Type.h revision 4410489163931892b568f0a43bd49c430a3aa3f5
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/AST/NestedNameSpecifier.h" 18#include "clang/AST/TemplateName.h" 19#include "clang/Basic/Diagnostic.h" 20#include "clang/Basic/ExceptionSpecificationType.h" 21#include "clang/Basic/IdentifierTable.h" 22#include "clang/Basic/LLVM.h" 23#include "clang/Basic/Linkage.h" 24#include "clang/Basic/PartialDiagnostic.h" 25#include "clang/Basic/Specifiers.h" 26#include "clang/Basic/Visibility.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32#include "llvm/ADT/Twine.h" 33#include "llvm/Support/ErrorHandling.h" 34#include "llvm/Support/type_traits.h" 35 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefNameDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class FunctionDecl; 85 class ObjCInterfaceDecl; 86 class ObjCProtocolDecl; 87 class ObjCMethodDecl; 88 class UnresolvedUsingTypenameDecl; 89 class Expr; 90 class Stmt; 91 class SourceLocation; 92 class StmtIteratorBase; 93 class TemplateArgument; 94 class TemplateArgumentLoc; 95 class TemplateArgumentListInfo; 96 class ElaboratedType; 97 class ExtQuals; 98 class ExtQualsTypeCommonBase; 99 struct PrintingPolicy; 100 101 template <typename> class CanQual; 102 typedef CanQual<Type> CanQualType; 103 104 // Provide forward declarations for all of the *Type classes 105#define TYPE(Class, Base) class Class##Type; 106#include "clang/AST/TypeNodes.def" 107 108/// Qualifiers - The collection of all-type qualifiers we support. 109/// Clang supports five independent qualifiers: 110/// * C99: const, volatile, and restrict 111/// * Embedded C (TR18037): address spaces 112/// * Objective C: the GC attributes (none, weak, or strong) 113class Qualifiers { 114public: 115 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 116 Const = 0x1, 117 Restrict = 0x2, 118 Volatile = 0x4, 119 CVRMask = Const | Volatile | Restrict 120 }; 121 122 enum GC { 123 GCNone = 0, 124 Weak, 125 Strong 126 }; 127 128 enum ObjCLifetime { 129 /// There is no lifetime qualification on this type. 130 OCL_None, 131 132 /// This object can be modified without requiring retains or 133 /// releases. 134 OCL_ExplicitNone, 135 136 /// Assigning into this object requires the old value to be 137 /// released and the new value to be retained. The timing of the 138 /// release of the old value is inexact: it may be moved to 139 /// immediately after the last known point where the value is 140 /// live. 141 OCL_Strong, 142 143 /// Reading or writing from this object requires a barrier call. 144 OCL_Weak, 145 146 /// Assigning into this object requires a lifetime extension. 147 OCL_Autoreleasing 148 }; 149 150 enum { 151 /// The maximum supported address space number. 152 /// 24 bits should be enough for anyone. 153 MaxAddressSpace = 0xffffffu, 154 155 /// The width of the "fast" qualifier mask. 156 FastWidth = 3, 157 158 /// The fast qualifier mask. 159 FastMask = (1 << FastWidth) - 1 160 }; 161 162 Qualifiers() : Mask(0) {} 163 164 /// \brief Returns the common set of qualifiers while removing them from 165 /// the given sets. 166 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { 167 // If both are only CVR-qualified, bit operations are sufficient. 168 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { 169 Qualifiers Q; 170 Q.Mask = L.Mask & R.Mask; 171 L.Mask &= ~Q.Mask; 172 R.Mask &= ~Q.Mask; 173 return Q; 174 } 175 176 Qualifiers Q; 177 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); 178 Q.addCVRQualifiers(CommonCRV); 179 L.removeCVRQualifiers(CommonCRV); 180 R.removeCVRQualifiers(CommonCRV); 181 182 if (L.getObjCGCAttr() == R.getObjCGCAttr()) { 183 Q.setObjCGCAttr(L.getObjCGCAttr()); 184 L.removeObjCGCAttr(); 185 R.removeObjCGCAttr(); 186 } 187 188 if (L.getObjCLifetime() == R.getObjCLifetime()) { 189 Q.setObjCLifetime(L.getObjCLifetime()); 190 L.removeObjCLifetime(); 191 R.removeObjCLifetime(); 192 } 193 194 if (L.getAddressSpace() == R.getAddressSpace()) { 195 Q.setAddressSpace(L.getAddressSpace()); 196 L.removeAddressSpace(); 197 R.removeAddressSpace(); 198 } 199 return Q; 200 } 201 202 static Qualifiers fromFastMask(unsigned Mask) { 203 Qualifiers Qs; 204 Qs.addFastQualifiers(Mask); 205 return Qs; 206 } 207 208 static Qualifiers fromCVRMask(unsigned CVR) { 209 Qualifiers Qs; 210 Qs.addCVRQualifiers(CVR); 211 return Qs; 212 } 213 214 // Deserialize qualifiers from an opaque representation. 215 static Qualifiers fromOpaqueValue(unsigned opaque) { 216 Qualifiers Qs; 217 Qs.Mask = opaque; 218 return Qs; 219 } 220 221 // Serialize these qualifiers into an opaque representation. 222 unsigned getAsOpaqueValue() const { 223 return Mask; 224 } 225 226 bool hasConst() const { return Mask & Const; } 227 void setConst(bool flag) { 228 Mask = (Mask & ~Const) | (flag ? Const : 0); 229 } 230 void removeConst() { Mask &= ~Const; } 231 void addConst() { Mask |= Const; } 232 233 bool hasVolatile() const { return Mask & Volatile; } 234 void setVolatile(bool flag) { 235 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 236 } 237 void removeVolatile() { Mask &= ~Volatile; } 238 void addVolatile() { Mask |= Volatile; } 239 240 bool hasRestrict() const { return Mask & Restrict; } 241 void setRestrict(bool flag) { 242 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 243 } 244 void removeRestrict() { Mask &= ~Restrict; } 245 void addRestrict() { Mask |= Restrict; } 246 247 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 248 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 249 void setCVRQualifiers(unsigned mask) { 250 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 251 Mask = (Mask & ~CVRMask) | mask; 252 } 253 void removeCVRQualifiers(unsigned mask) { 254 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 255 Mask &= ~mask; 256 } 257 void removeCVRQualifiers() { 258 removeCVRQualifiers(CVRMask); 259 } 260 void addCVRQualifiers(unsigned mask) { 261 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 262 Mask |= mask; 263 } 264 265 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 266 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 267 void setObjCGCAttr(GC type) { 268 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 269 } 270 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 271 void addObjCGCAttr(GC type) { 272 assert(type); 273 setObjCGCAttr(type); 274 } 275 Qualifiers withoutObjCGCAttr() const { 276 Qualifiers qs = *this; 277 qs.removeObjCGCAttr(); 278 return qs; 279 } 280 Qualifiers withoutObjCLifetime() const { 281 Qualifiers qs = *this; 282 qs.removeObjCLifetime(); 283 return qs; 284 } 285 286 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 287 ObjCLifetime getObjCLifetime() const { 288 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 289 } 290 void setObjCLifetime(ObjCLifetime type) { 291 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 292 } 293 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 294 void addObjCLifetime(ObjCLifetime type) { 295 assert(type); 296 assert(!hasObjCLifetime()); 297 Mask |= (type << LifetimeShift); 298 } 299 300 /// True if the lifetime is neither None or ExplicitNone. 301 bool hasNonTrivialObjCLifetime() const { 302 ObjCLifetime lifetime = getObjCLifetime(); 303 return (lifetime > OCL_ExplicitNone); 304 } 305 306 /// True if the lifetime is either strong or weak. 307 bool hasStrongOrWeakObjCLifetime() const { 308 ObjCLifetime lifetime = getObjCLifetime(); 309 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 310 } 311 312 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 313 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 314 void setAddressSpace(unsigned space) { 315 assert(space <= MaxAddressSpace); 316 Mask = (Mask & ~AddressSpaceMask) 317 | (((uint32_t) space) << AddressSpaceShift); 318 } 319 void removeAddressSpace() { setAddressSpace(0); } 320 void addAddressSpace(unsigned space) { 321 assert(space); 322 setAddressSpace(space); 323 } 324 325 // Fast qualifiers are those that can be allocated directly 326 // on a QualType object. 327 bool hasFastQualifiers() const { return getFastQualifiers(); } 328 unsigned getFastQualifiers() const { return Mask & FastMask; } 329 void setFastQualifiers(unsigned mask) { 330 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 331 Mask = (Mask & ~FastMask) | mask; 332 } 333 void removeFastQualifiers(unsigned mask) { 334 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 335 Mask &= ~mask; 336 } 337 void removeFastQualifiers() { 338 removeFastQualifiers(FastMask); 339 } 340 void addFastQualifiers(unsigned mask) { 341 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 342 Mask |= mask; 343 } 344 345 /// hasNonFastQualifiers - Return true if the set contains any 346 /// qualifiers which require an ExtQuals node to be allocated. 347 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 348 Qualifiers getNonFastQualifiers() const { 349 Qualifiers Quals = *this; 350 Quals.setFastQualifiers(0); 351 return Quals; 352 } 353 354 /// hasQualifiers - Return true if the set contains any qualifiers. 355 bool hasQualifiers() const { return Mask; } 356 bool empty() const { return !Mask; } 357 358 /// \brief Add the qualifiers from the given set to this set. 359 void addQualifiers(Qualifiers Q) { 360 // If the other set doesn't have any non-boolean qualifiers, just 361 // bit-or it in. 362 if (!(Q.Mask & ~CVRMask)) 363 Mask |= Q.Mask; 364 else { 365 Mask |= (Q.Mask & CVRMask); 366 if (Q.hasAddressSpace()) 367 addAddressSpace(Q.getAddressSpace()); 368 if (Q.hasObjCGCAttr()) 369 addObjCGCAttr(Q.getObjCGCAttr()); 370 if (Q.hasObjCLifetime()) 371 addObjCLifetime(Q.getObjCLifetime()); 372 } 373 } 374 375 /// \brief Remove the qualifiers from the given set from this set. 376 void removeQualifiers(Qualifiers Q) { 377 // If the other set doesn't have any non-boolean qualifiers, just 378 // bit-and the inverse in. 379 if (!(Q.Mask & ~CVRMask)) 380 Mask &= ~Q.Mask; 381 else { 382 Mask &= ~(Q.Mask & CVRMask); 383 if (getObjCGCAttr() == Q.getObjCGCAttr()) 384 removeObjCGCAttr(); 385 if (getObjCLifetime() == Q.getObjCLifetime()) 386 removeObjCLifetime(); 387 if (getAddressSpace() == Q.getAddressSpace()) 388 removeAddressSpace(); 389 } 390 } 391 392 /// \brief Add the qualifiers from the given set to this set, given that 393 /// they don't conflict. 394 void addConsistentQualifiers(Qualifiers qs) { 395 assert(getAddressSpace() == qs.getAddressSpace() || 396 !hasAddressSpace() || !qs.hasAddressSpace()); 397 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 398 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 399 assert(getObjCLifetime() == qs.getObjCLifetime() || 400 !hasObjCLifetime() || !qs.hasObjCLifetime()); 401 Mask |= qs.Mask; 402 } 403 404 /// \brief Determines if these qualifiers compatibly include another set. 405 /// Generally this answers the question of whether an object with the other 406 /// qualifiers can be safely used as an object with these qualifiers. 407 bool compatiblyIncludes(Qualifiers other) const { 408 return 409 // Address spaces must match exactly. 410 getAddressSpace() == other.getAddressSpace() && 411 // ObjC GC qualifiers can match, be added, or be removed, but can't be 412 // changed. 413 (getObjCGCAttr() == other.getObjCGCAttr() || 414 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 415 // ObjC lifetime qualifiers must match exactly. 416 getObjCLifetime() == other.getObjCLifetime() && 417 // CVR qualifiers may subset. 418 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 419 } 420 421 /// \brief Determines if these qualifiers compatibly include another set of 422 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 423 /// 424 /// One set of Objective-C lifetime qualifiers compatibly includes the other 425 /// if the lifetime qualifiers match, or if both are non-__weak and the 426 /// including set also contains the 'const' qualifier. 427 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 428 if (getObjCLifetime() == other.getObjCLifetime()) 429 return true; 430 431 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 432 return false; 433 434 return hasConst(); 435 } 436 437 /// \brief Determine whether this set of qualifiers is a strict superset of 438 /// another set of qualifiers, not considering qualifier compatibility. 439 bool isStrictSupersetOf(Qualifiers Other) const; 440 441 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 442 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 443 444 operator bool() const { return hasQualifiers(); } 445 446 Qualifiers &operator+=(Qualifiers R) { 447 addQualifiers(R); 448 return *this; 449 } 450 451 // Union two qualifier sets. If an enumerated qualifier appears 452 // in both sets, use the one from the right. 453 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 454 L += R; 455 return L; 456 } 457 458 Qualifiers &operator-=(Qualifiers R) { 459 removeQualifiers(R); 460 return *this; 461 } 462 463 /// \brief Compute the difference between two qualifier sets. 464 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 465 L -= R; 466 return L; 467 } 468 469 std::string getAsString() const; 470 std::string getAsString(const PrintingPolicy &Policy) const; 471 472 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; 473 void print(raw_ostream &OS, const PrintingPolicy &Policy, 474 bool appendSpaceIfNonEmpty = false) const; 475 476 void Profile(llvm::FoldingSetNodeID &ID) const { 477 ID.AddInteger(Mask); 478 } 479 480private: 481 482 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 483 // |C R V|GCAttr|Lifetime|AddressSpace| 484 uint32_t Mask; 485 486 static const uint32_t GCAttrMask = 0x18; 487 static const uint32_t GCAttrShift = 3; 488 static const uint32_t LifetimeMask = 0xE0; 489 static const uint32_t LifetimeShift = 5; 490 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 491 static const uint32_t AddressSpaceShift = 8; 492}; 493 494/// A std::pair-like structure for storing a qualified type split 495/// into its local qualifiers and its locally-unqualified type. 496struct SplitQualType { 497 /// The locally-unqualified type. 498 const Type *Ty; 499 500 /// The local qualifiers. 501 Qualifiers Quals; 502 503 SplitQualType() : Ty(0), Quals() {} 504 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 505 506 SplitQualType getSingleStepDesugaredType() const; // end of this file 507 508 // Make llvm::tie work. 509 operator std::pair<const Type *,Qualifiers>() const { 510 return std::pair<const Type *,Qualifiers>(Ty, Quals); 511 } 512 513 friend bool operator==(SplitQualType a, SplitQualType b) { 514 return a.Ty == b.Ty && a.Quals == b.Quals; 515 } 516 friend bool operator!=(SplitQualType a, SplitQualType b) { 517 return a.Ty != b.Ty || a.Quals != b.Quals; 518 } 519}; 520 521/// QualType - For efficiency, we don't store CV-qualified types as nodes on 522/// their own: instead each reference to a type stores the qualifiers. This 523/// greatly reduces the number of nodes we need to allocate for types (for 524/// example we only need one for 'int', 'const int', 'volatile int', 525/// 'const volatile int', etc). 526/// 527/// As an added efficiency bonus, instead of making this a pair, we 528/// just store the two bits we care about in the low bits of the 529/// pointer. To handle the packing/unpacking, we make QualType be a 530/// simple wrapper class that acts like a smart pointer. A third bit 531/// indicates whether there are extended qualifiers present, in which 532/// case the pointer points to a special structure. 533class QualType { 534 // Thankfully, these are efficiently composable. 535 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 536 Qualifiers::FastWidth> Value; 537 538 const ExtQuals *getExtQualsUnsafe() const { 539 return Value.getPointer().get<const ExtQuals*>(); 540 } 541 542 const Type *getTypePtrUnsafe() const { 543 return Value.getPointer().get<const Type*>(); 544 } 545 546 const ExtQualsTypeCommonBase *getCommonPtr() const { 547 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 548 uintptr_t CommonPtrVal 549 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 550 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 551 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 552 } 553 554 friend class QualifierCollector; 555public: 556 QualType() {} 557 558 QualType(const Type *Ptr, unsigned Quals) 559 : Value(Ptr, Quals) {} 560 QualType(const ExtQuals *Ptr, unsigned Quals) 561 : Value(Ptr, Quals) {} 562 563 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 564 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 565 566 /// Retrieves a pointer to the underlying (unqualified) type. 567 /// 568 /// This function requires that the type not be NULL. If the type might be 569 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 570 const Type *getTypePtr() const; 571 572 const Type *getTypePtrOrNull() const; 573 574 /// Retrieves a pointer to the name of the base type. 575 const IdentifierInfo *getBaseTypeIdentifier() const; 576 577 /// Divides a QualType into its unqualified type and a set of local 578 /// qualifiers. 579 SplitQualType split() const; 580 581 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 582 static QualType getFromOpaquePtr(const void *Ptr) { 583 QualType T; 584 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 585 return T; 586 } 587 588 const Type &operator*() const { 589 return *getTypePtr(); 590 } 591 592 const Type *operator->() const { 593 return getTypePtr(); 594 } 595 596 bool isCanonical() const; 597 bool isCanonicalAsParam() const; 598 599 /// isNull - Return true if this QualType doesn't point to a type yet. 600 bool isNull() const { 601 return Value.getPointer().isNull(); 602 } 603 604 /// \brief Determine whether this particular QualType instance has the 605 /// "const" qualifier set, without looking through typedefs that may have 606 /// added "const" at a different level. 607 bool isLocalConstQualified() const { 608 return (getLocalFastQualifiers() & Qualifiers::Const); 609 } 610 611 /// \brief Determine whether this type is const-qualified. 612 bool isConstQualified() const; 613 614 /// \brief Determine whether this particular QualType instance has the 615 /// "restrict" qualifier set, without looking through typedefs that may have 616 /// added "restrict" at a different level. 617 bool isLocalRestrictQualified() const { 618 return (getLocalFastQualifiers() & Qualifiers::Restrict); 619 } 620 621 /// \brief Determine whether this type is restrict-qualified. 622 bool isRestrictQualified() const; 623 624 /// \brief Determine whether this particular QualType instance has the 625 /// "volatile" qualifier set, without looking through typedefs that may have 626 /// added "volatile" at a different level. 627 bool isLocalVolatileQualified() const { 628 return (getLocalFastQualifiers() & Qualifiers::Volatile); 629 } 630 631 /// \brief Determine whether this type is volatile-qualified. 632 bool isVolatileQualified() const; 633 634 /// \brief Determine whether this particular QualType instance has any 635 /// qualifiers, without looking through any typedefs that might add 636 /// qualifiers at a different level. 637 bool hasLocalQualifiers() const { 638 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 639 } 640 641 /// \brief Determine whether this type has any qualifiers. 642 bool hasQualifiers() const; 643 644 /// \brief Determine whether this particular QualType instance has any 645 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 646 /// instance. 647 bool hasLocalNonFastQualifiers() const { 648 return Value.getPointer().is<const ExtQuals*>(); 649 } 650 651 /// \brief Retrieve the set of qualifiers local to this particular QualType 652 /// instance, not including any qualifiers acquired through typedefs or 653 /// other sugar. 654 Qualifiers getLocalQualifiers() const; 655 656 /// \brief Retrieve the set of qualifiers applied to this type. 657 Qualifiers getQualifiers() const; 658 659 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 660 /// local to this particular QualType instance, not including any qualifiers 661 /// acquired through typedefs or other sugar. 662 unsigned getLocalCVRQualifiers() const { 663 return getLocalFastQualifiers(); 664 } 665 666 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 667 /// applied to this type. 668 unsigned getCVRQualifiers() const; 669 670 bool isConstant(ASTContext& Ctx) const { 671 return QualType::isConstant(*this, Ctx); 672 } 673 674 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 675 bool isPODType(ASTContext &Context) const; 676 677 /// isCXX98PODType() - Return true if this is a POD type according to the 678 /// rules of the C++98 standard, regardless of the current compilation's 679 /// language. 680 bool isCXX98PODType(ASTContext &Context) const; 681 682 /// isCXX11PODType() - Return true if this is a POD type according to the 683 /// more relaxed rules of the C++11 standard, regardless of the current 684 /// compilation's language. 685 /// (C++0x [basic.types]p9) 686 bool isCXX11PODType(ASTContext &Context) const; 687 688 /// isTrivialType - Return true if this is a trivial type 689 /// (C++0x [basic.types]p9) 690 bool isTrivialType(ASTContext &Context) const; 691 692 /// isTriviallyCopyableType - Return true if this is a trivially 693 /// copyable type (C++0x [basic.types]p9) 694 bool isTriviallyCopyableType(ASTContext &Context) const; 695 696 // Don't promise in the API that anything besides 'const' can be 697 // easily added. 698 699 /// addConst - add the specified type qualifier to this QualType. 700 void addConst() { 701 addFastQualifiers(Qualifiers::Const); 702 } 703 QualType withConst() const { 704 return withFastQualifiers(Qualifiers::Const); 705 } 706 707 /// addVolatile - add the specified type qualifier to this QualType. 708 void addVolatile() { 709 addFastQualifiers(Qualifiers::Volatile); 710 } 711 QualType withVolatile() const { 712 return withFastQualifiers(Qualifiers::Volatile); 713 } 714 715 /// Add the restrict qualifier to this QualType. 716 void addRestrict() { 717 addFastQualifiers(Qualifiers::Restrict); 718 } 719 QualType withRestrict() const { 720 return withFastQualifiers(Qualifiers::Restrict); 721 } 722 723 QualType withCVRQualifiers(unsigned CVR) const { 724 return withFastQualifiers(CVR); 725 } 726 727 void addFastQualifiers(unsigned TQs) { 728 assert(!(TQs & ~Qualifiers::FastMask) 729 && "non-fast qualifier bits set in mask!"); 730 Value.setInt(Value.getInt() | TQs); 731 } 732 733 void removeLocalConst(); 734 void removeLocalVolatile(); 735 void removeLocalRestrict(); 736 void removeLocalCVRQualifiers(unsigned Mask); 737 738 void removeLocalFastQualifiers() { Value.setInt(0); } 739 void removeLocalFastQualifiers(unsigned Mask) { 740 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 741 Value.setInt(Value.getInt() & ~Mask); 742 } 743 744 // Creates a type with the given qualifiers in addition to any 745 // qualifiers already on this type. 746 QualType withFastQualifiers(unsigned TQs) const { 747 QualType T = *this; 748 T.addFastQualifiers(TQs); 749 return T; 750 } 751 752 // Creates a type with exactly the given fast qualifiers, removing 753 // any existing fast qualifiers. 754 QualType withExactLocalFastQualifiers(unsigned TQs) const { 755 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 756 } 757 758 // Removes fast qualifiers, but leaves any extended qualifiers in place. 759 QualType withoutLocalFastQualifiers() const { 760 QualType T = *this; 761 T.removeLocalFastQualifiers(); 762 return T; 763 } 764 765 QualType getCanonicalType() const; 766 767 /// \brief Return this type with all of the instance-specific qualifiers 768 /// removed, but without removing any qualifiers that may have been applied 769 /// through typedefs. 770 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 771 772 /// \brief Retrieve the unqualified variant of the given type, 773 /// removing as little sugar as possible. 774 /// 775 /// This routine looks through various kinds of sugar to find the 776 /// least-desugared type that is unqualified. For example, given: 777 /// 778 /// \code 779 /// typedef int Integer; 780 /// typedef const Integer CInteger; 781 /// typedef CInteger DifferenceType; 782 /// \endcode 783 /// 784 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 785 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 786 /// 787 /// The resulting type might still be qualified if it's sugar for an array 788 /// type. To strip qualifiers even from within a sugared array type, use 789 /// ASTContext::getUnqualifiedArrayType. 790 inline QualType getUnqualifiedType() const; 791 792 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 793 /// given type, removing as little sugar as possible. 794 /// 795 /// Like getUnqualifiedType(), but also returns the set of 796 /// qualifiers that were built up. 797 /// 798 /// The resulting type might still be qualified if it's sugar for an array 799 /// type. To strip qualifiers even from within a sugared array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982private: 983 // These methods are implemented in a separate translation unit; 984 // "static"-ize them to avoid creating temporary QualTypes in the 985 // caller. 986 static bool isConstant(QualType T, ASTContext& Ctx); 987 static QualType getDesugaredType(QualType T, const ASTContext &Context); 988 static SplitQualType getSplitDesugaredType(QualType T); 989 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 990 static QualType getSingleStepDesugaredTypeImpl(QualType type, 991 const ASTContext &C); 992 static QualType IgnoreParens(QualType T); 993 static DestructionKind isDestructedTypeImpl(QualType type); 994}; 995 996} // end clang. 997 998namespace llvm { 999/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000/// to a specific Type class. 1001template<> struct simplify_type< ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(::clang::QualType Val) { 1004 return Val.getTypePtr(); 1005 } 1006}; 1007 1008// Teach SmallPtrSet that QualType is "basically a pointer". 1009template<> 1010class PointerLikeTypeTraits<clang::QualType> { 1011public: 1012 static inline void *getAsVoidPointer(clang::QualType P) { 1013 return P.getAsOpaquePtr(); 1014 } 1015 static inline clang::QualType getFromVoidPointer(void *P) { 1016 return clang::QualType::getFromOpaquePtr(P); 1017 } 1018 // Various qualifiers go in low bits. 1019 enum { NumLowBitsAvailable = 0 }; 1020}; 1021 1022} // end namespace llvm 1023 1024namespace clang { 1025 1026/// \brief Base class that is common to both the \c ExtQuals and \c Type 1027/// classes, which allows \c QualType to access the common fields between the 1028/// two. 1029/// 1030class ExtQualsTypeCommonBase { 1031 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1032 : BaseType(baseType), CanonicalType(canon) {} 1033 1034 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1035 /// a self-referential pointer (for \c Type). 1036 /// 1037 /// This pointer allows an efficient mapping from a QualType to its 1038 /// underlying type pointer. 1039 const Type *const BaseType; 1040 1041 /// \brief The canonical type of this type. A QualType. 1042 QualType CanonicalType; 1043 1044 friend class QualType; 1045 friend class Type; 1046 friend class ExtQuals; 1047}; 1048 1049/// ExtQuals - We can encode up to four bits in the low bits of a 1050/// type pointer, but there are many more type qualifiers that we want 1051/// to be able to apply to an arbitrary type. Therefore we have this 1052/// struct, intended to be heap-allocated and used by QualType to 1053/// store qualifiers. 1054/// 1055/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1056/// in three low bits on the QualType pointer; a fourth bit records whether 1057/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1058/// Objective-C GC attributes) are much more rare. 1059class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1060 // NOTE: changing the fast qualifiers should be straightforward as 1061 // long as you don't make 'const' non-fast. 1062 // 1. Qualifiers: 1063 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1064 // Fast qualifiers must occupy the low-order bits. 1065 // b) Update Qualifiers::FastWidth and FastMask. 1066 // 2. QualType: 1067 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1068 // b) Update remove{Volatile,Restrict}, defined near the end of 1069 // this header. 1070 // 3. ASTContext: 1071 // a) Update get{Volatile,Restrict}Type. 1072 1073 /// Quals - the immutable set of qualifiers applied by this 1074 /// node; always contains extended qualifiers. 1075 Qualifiers Quals; 1076 1077 ExtQuals *this_() { return this; } 1078 1079public: 1080 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1081 : ExtQualsTypeCommonBase(baseType, 1082 canon.isNull() ? QualType(this_(), 0) : canon), 1083 Quals(quals) 1084 { 1085 assert(Quals.hasNonFastQualifiers() 1086 && "ExtQuals created with no fast qualifiers"); 1087 assert(!Quals.hasFastQualifiers() 1088 && "ExtQuals created with fast qualifiers"); 1089 } 1090 1091 Qualifiers getQualifiers() const { return Quals; } 1092 1093 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1094 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1095 1096 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1097 Qualifiers::ObjCLifetime getObjCLifetime() const { 1098 return Quals.getObjCLifetime(); 1099 } 1100 1101 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1102 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1103 1104 const Type *getBaseType() const { return BaseType; } 1105 1106public: 1107 void Profile(llvm::FoldingSetNodeID &ID) const { 1108 Profile(ID, getBaseType(), Quals); 1109 } 1110 static void Profile(llvm::FoldingSetNodeID &ID, 1111 const Type *BaseType, 1112 Qualifiers Quals) { 1113 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1114 ID.AddPointer(BaseType); 1115 Quals.Profile(ID); 1116 } 1117}; 1118 1119/// \brief The kind of C++0x ref-qualifier associated with a function type, 1120/// which determines whether a member function's "this" object can be an 1121/// lvalue, rvalue, or neither. 1122enum RefQualifierKind { 1123 /// \brief No ref-qualifier was provided. 1124 RQ_None = 0, 1125 /// \brief An lvalue ref-qualifier was provided (\c &). 1126 RQ_LValue, 1127 /// \brief An rvalue ref-qualifier was provided (\c &&). 1128 RQ_RValue 1129}; 1130 1131/// Type - This is the base class of the type hierarchy. A central concept 1132/// with types is that each type always has a canonical type. A canonical type 1133/// is the type with any typedef names stripped out of it or the types it 1134/// references. For example, consider: 1135/// 1136/// typedef int foo; 1137/// typedef foo* bar; 1138/// 'int *' 'foo *' 'bar' 1139/// 1140/// There will be a Type object created for 'int'. Since int is canonical, its 1141/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1142/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1143/// there is a PointerType that represents 'int*', which, like 'int', is 1144/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1145/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1146/// is also 'int*'. 1147/// 1148/// Non-canonical types are useful for emitting diagnostics, without losing 1149/// information about typedefs being used. Canonical types are useful for type 1150/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1151/// about whether something has a particular form (e.g. is a function type), 1152/// because they implicitly, recursively, strip all typedefs out of a type. 1153/// 1154/// Types, once created, are immutable. 1155/// 1156class Type : public ExtQualsTypeCommonBase { 1157public: 1158 enum TypeClass { 1159#define TYPE(Class, Base) Class, 1160#define LAST_TYPE(Class) TypeLast = Class, 1161#define ABSTRACT_TYPE(Class, Base) 1162#include "clang/AST/TypeNodes.def" 1163 TagFirst = Record, TagLast = Enum 1164 }; 1165 1166private: 1167 Type(const Type &) LLVM_DELETED_FUNCTION; 1168 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1169 1170 /// Bitfields required by the Type class. 1171 class TypeBitfields { 1172 friend class Type; 1173 template <class T> friend class TypePropertyCache; 1174 1175 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1176 unsigned TC : 8; 1177 1178 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1179 unsigned Dependent : 1; 1180 1181 /// \brief Whether this type somehow involves a template parameter, even 1182 /// if the resolution of the type does not depend on a template parameter. 1183 unsigned InstantiationDependent : 1; 1184 1185 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1186 unsigned VariablyModified : 1; 1187 1188 /// \brief Whether this type contains an unexpanded parameter pack 1189 /// (for C++0x variadic templates). 1190 unsigned ContainsUnexpandedParameterPack : 1; 1191 1192 /// \brief True if the cache (i.e. the bitfields here starting with 1193 /// 'Cache') is valid. 1194 mutable unsigned CacheValid : 1; 1195 1196 /// \brief Linkage of this type. 1197 mutable unsigned CachedLinkage : 2; 1198 1199 /// \brief Whether this type involves and local or unnamed types. 1200 mutable unsigned CachedLocalOrUnnamed : 1; 1201 1202 /// \brief FromAST - Whether this type comes from an AST file. 1203 mutable unsigned FromAST : 1; 1204 1205 bool isCacheValid() const { 1206 return CacheValid; 1207 } 1208 Linkage getLinkage() const { 1209 assert(isCacheValid() && "getting linkage from invalid cache"); 1210 return static_cast<Linkage>(CachedLinkage); 1211 } 1212 bool hasLocalOrUnnamedType() const { 1213 assert(isCacheValid() && "getting linkage from invalid cache"); 1214 return CachedLocalOrUnnamed; 1215 } 1216 }; 1217 enum { NumTypeBits = 19 }; 1218 1219protected: 1220 // These classes allow subclasses to somewhat cleanly pack bitfields 1221 // into Type. 1222 1223 class ArrayTypeBitfields { 1224 friend class ArrayType; 1225 1226 unsigned : NumTypeBits; 1227 1228 /// IndexTypeQuals - CVR qualifiers from declarations like 1229 /// 'int X[static restrict 4]'. For function parameters only. 1230 unsigned IndexTypeQuals : 3; 1231 1232 /// SizeModifier - storage class qualifiers from declarations like 1233 /// 'int X[static restrict 4]'. For function parameters only. 1234 /// Actually an ArrayType::ArraySizeModifier. 1235 unsigned SizeModifier : 3; 1236 }; 1237 1238 class BuiltinTypeBitfields { 1239 friend class BuiltinType; 1240 1241 unsigned : NumTypeBits; 1242 1243 /// The kind (BuiltinType::Kind) of builtin type this is. 1244 unsigned Kind : 8; 1245 }; 1246 1247 class FunctionTypeBitfields { 1248 friend class FunctionType; 1249 1250 unsigned : NumTypeBits; 1251 1252 /// Extra information which affects how the function is called, like 1253 /// regparm and the calling convention. 1254 unsigned ExtInfo : 9; 1255 1256 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1257 /// other bitfields. 1258 /// The qualifiers are part of FunctionProtoType because... 1259 /// 1260 /// C++ 8.3.5p4: The return type, the parameter type list and the 1261 /// cv-qualifier-seq, [...], are part of the function type. 1262 unsigned TypeQuals : 3; 1263 }; 1264 1265 class ObjCObjectTypeBitfields { 1266 friend class ObjCObjectType; 1267 1268 unsigned : NumTypeBits; 1269 1270 /// NumProtocols - The number of protocols stored directly on this 1271 /// object type. 1272 unsigned NumProtocols : 32 - NumTypeBits; 1273 }; 1274 1275 class ReferenceTypeBitfields { 1276 friend class ReferenceType; 1277 1278 unsigned : NumTypeBits; 1279 1280 /// True if the type was originally spelled with an lvalue sigil. 1281 /// This is never true of rvalue references but can also be false 1282 /// on lvalue references because of C++0x [dcl.typedef]p9, 1283 /// as follows: 1284 /// 1285 /// typedef int &ref; // lvalue, spelled lvalue 1286 /// typedef int &&rvref; // rvalue 1287 /// ref &a; // lvalue, inner ref, spelled lvalue 1288 /// ref &&a; // lvalue, inner ref 1289 /// rvref &a; // lvalue, inner ref, spelled lvalue 1290 /// rvref &&a; // rvalue, inner ref 1291 unsigned SpelledAsLValue : 1; 1292 1293 /// True if the inner type is a reference type. This only happens 1294 /// in non-canonical forms. 1295 unsigned InnerRef : 1; 1296 }; 1297 1298 class TypeWithKeywordBitfields { 1299 friend class TypeWithKeyword; 1300 1301 unsigned : NumTypeBits; 1302 1303 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1304 unsigned Keyword : 8; 1305 }; 1306 1307 class VectorTypeBitfields { 1308 friend class VectorType; 1309 1310 unsigned : NumTypeBits; 1311 1312 /// VecKind - The kind of vector, either a generic vector type or some 1313 /// target-specific vector type such as for AltiVec or Neon. 1314 unsigned VecKind : 3; 1315 1316 /// NumElements - The number of elements in the vector. 1317 unsigned NumElements : 29 - NumTypeBits; 1318 }; 1319 1320 class AttributedTypeBitfields { 1321 friend class AttributedType; 1322 1323 unsigned : NumTypeBits; 1324 1325 /// AttrKind - an AttributedType::Kind 1326 unsigned AttrKind : 32 - NumTypeBits; 1327 }; 1328 1329 union { 1330 TypeBitfields TypeBits; 1331 ArrayTypeBitfields ArrayTypeBits; 1332 AttributedTypeBitfields AttributedTypeBits; 1333 BuiltinTypeBitfields BuiltinTypeBits; 1334 FunctionTypeBitfields FunctionTypeBits; 1335 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1336 ReferenceTypeBitfields ReferenceTypeBits; 1337 TypeWithKeywordBitfields TypeWithKeywordBits; 1338 VectorTypeBitfields VectorTypeBits; 1339 }; 1340 1341private: 1342 /// \brief Set whether this type comes from an AST file. 1343 void setFromAST(bool V = true) const { 1344 TypeBits.FromAST = V; 1345 } 1346 1347 template <class T> friend class TypePropertyCache; 1348 1349protected: 1350 // silence VC++ warning C4355: 'this' : used in base member initializer list 1351 Type *this_() { return this; } 1352 Type(TypeClass tc, QualType canon, bool Dependent, 1353 bool InstantiationDependent, bool VariablyModified, 1354 bool ContainsUnexpandedParameterPack) 1355 : ExtQualsTypeCommonBase(this, 1356 canon.isNull() ? QualType(this_(), 0) : canon) { 1357 TypeBits.TC = tc; 1358 TypeBits.Dependent = Dependent; 1359 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1360 TypeBits.VariablyModified = VariablyModified; 1361 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1362 TypeBits.CacheValid = false; 1363 TypeBits.CachedLocalOrUnnamed = false; 1364 TypeBits.CachedLinkage = NoLinkage; 1365 TypeBits.FromAST = false; 1366 } 1367 friend class ASTContext; 1368 1369 void setDependent(bool D = true) { 1370 TypeBits.Dependent = D; 1371 if (D) 1372 TypeBits.InstantiationDependent = true; 1373 } 1374 void setInstantiationDependent(bool D = true) { 1375 TypeBits.InstantiationDependent = D; } 1376 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1377 } 1378 void setContainsUnexpandedParameterPack(bool PP = true) { 1379 TypeBits.ContainsUnexpandedParameterPack = PP; 1380 } 1381 1382public: 1383 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1384 1385 /// \brief Whether this type comes from an AST file. 1386 bool isFromAST() const { return TypeBits.FromAST; } 1387 1388 /// \brief Whether this type is or contains an unexpanded parameter 1389 /// pack, used to support C++0x variadic templates. 1390 /// 1391 /// A type that contains a parameter pack shall be expanded by the 1392 /// ellipsis operator at some point. For example, the typedef in the 1393 /// following example contains an unexpanded parameter pack 'T': 1394 /// 1395 /// \code 1396 /// template<typename ...T> 1397 /// struct X { 1398 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1399 /// }; 1400 /// \endcode 1401 /// 1402 /// Note that this routine does not specify which 1403 bool containsUnexpandedParameterPack() const { 1404 return TypeBits.ContainsUnexpandedParameterPack; 1405 } 1406 1407 /// Determines if this type would be canonical if it had no further 1408 /// qualification. 1409 bool isCanonicalUnqualified() const { 1410 return CanonicalType == QualType(this, 0); 1411 } 1412 1413 /// Pull a single level of sugar off of this locally-unqualified type. 1414 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1415 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1416 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1417 1418 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1419 /// object types, function types, and incomplete types. 1420 1421 /// isIncompleteType - Return true if this is an incomplete type. 1422 /// A type that can describe objects, but which lacks information needed to 1423 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1424 /// routine will need to determine if the size is actually required. 1425 /// 1426 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1427 /// that can be completed (such as a C struct, C++ class, or Objective-C 1428 /// class), will be set to the declaration. 1429 bool isIncompleteType(NamedDecl **Def = 0) const; 1430 1431 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1432 /// type, in other words, not a function type. 1433 bool isIncompleteOrObjectType() const { 1434 return !isFunctionType(); 1435 } 1436 1437 /// \brief Determine whether this type is an object type. 1438 bool isObjectType() const { 1439 // C++ [basic.types]p8: 1440 // An object type is a (possibly cv-qualified) type that is not a 1441 // function type, not a reference type, and not a void type. 1442 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1443 } 1444 1445 /// isLiteralType - Return true if this is a literal type 1446 /// (C++0x [basic.types]p10) 1447 bool isLiteralType() const; 1448 1449 /// \brief Test if this type is a standard-layout type. 1450 /// (C++0x [basic.type]p9) 1451 bool isStandardLayoutType() const; 1452 1453 /// Helper methods to distinguish type categories. All type predicates 1454 /// operate on the canonical type, ignoring typedefs and qualifiers. 1455 1456 /// isBuiltinType - returns true if the type is a builtin type. 1457 bool isBuiltinType() const; 1458 1459 /// isSpecificBuiltinType - Test for a particular builtin type. 1460 bool isSpecificBuiltinType(unsigned K) const; 1461 1462 /// isPlaceholderType - Test for a type which does not represent an 1463 /// actual type-system type but is instead used as a placeholder for 1464 /// various convenient purposes within Clang. All such types are 1465 /// BuiltinTypes. 1466 bool isPlaceholderType() const; 1467 const BuiltinType *getAsPlaceholderType() const; 1468 1469 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1470 bool isSpecificPlaceholderType(unsigned K) const; 1471 1472 /// isNonOverloadPlaceholderType - Test for a placeholder type 1473 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1474 bool isNonOverloadPlaceholderType() const; 1475 1476 /// isIntegerType() does *not* include complex integers (a GCC extension). 1477 /// isComplexIntegerType() can be used to test for complex integers. 1478 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1479 bool isEnumeralType() const; 1480 bool isBooleanType() const; 1481 bool isCharType() const; 1482 bool isWideCharType() const; 1483 bool isChar16Type() const; 1484 bool isChar32Type() const; 1485 bool isAnyCharacterType() const; 1486 bool isIntegralType(ASTContext &Ctx) const; 1487 1488 /// \brief Determine whether this type is an integral or enumeration type. 1489 bool isIntegralOrEnumerationType() const; 1490 /// \brief Determine whether this type is an integral or unscoped enumeration 1491 /// type. 1492 bool isIntegralOrUnscopedEnumerationType() const; 1493 1494 /// Floating point categories. 1495 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1496 /// isComplexType() does *not* include complex integers (a GCC extension). 1497 /// isComplexIntegerType() can be used to test for complex integers. 1498 bool isComplexType() const; // C99 6.2.5p11 (complex) 1499 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1500 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1501 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1502 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1503 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1504 bool isVoidType() const; // C99 6.2.5p19 1505 bool isDerivedType() const; // C99 6.2.5p20 1506 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1507 bool isAggregateType() const; 1508 bool isFundamentalType() const; 1509 bool isCompoundType() const; 1510 1511 // Type Predicates: Check to see if this type is structurally the specified 1512 // type, ignoring typedefs and qualifiers. 1513 bool isFunctionType() const; 1514 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1515 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1516 bool isPointerType() const; 1517 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1518 bool isBlockPointerType() const; 1519 bool isVoidPointerType() const; 1520 bool isReferenceType() const; 1521 bool isLValueReferenceType() const; 1522 bool isRValueReferenceType() const; 1523 bool isFunctionPointerType() const; 1524 bool isMemberPointerType() const; 1525 bool isMemberFunctionPointerType() const; 1526 bool isMemberDataPointerType() const; 1527 bool isArrayType() const; 1528 bool isConstantArrayType() const; 1529 bool isIncompleteArrayType() const; 1530 bool isVariableArrayType() const; 1531 bool isDependentSizedArrayType() const; 1532 bool isRecordType() const; 1533 bool isClassType() const; 1534 bool isStructureType() const; 1535 bool isInterfaceType() const; 1536 bool isStructureOrClassType() const; 1537 bool isUnionType() const; 1538 bool isComplexIntegerType() const; // GCC _Complex integer type. 1539 bool isVectorType() const; // GCC vector type. 1540 bool isExtVectorType() const; // Extended vector type. 1541 bool isObjCObjectPointerType() const; // pointer to ObjC object 1542 bool isObjCRetainableType() const; // ObjC object or block pointer 1543 bool isObjCLifetimeType() const; // (array of)* retainable type 1544 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1545 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1546 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1547 // for the common case. 1548 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1549 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1550 bool isObjCQualifiedIdType() const; // id<foo> 1551 bool isObjCQualifiedClassType() const; // Class<foo> 1552 bool isObjCObjectOrInterfaceType() const; 1553 bool isObjCIdType() const; // id 1554 bool isObjCClassType() const; // Class 1555 bool isObjCSelType() const; // Class 1556 bool isObjCBuiltinType() const; // 'id' or 'Class' 1557 bool isObjCARCBridgableType() const; 1558 bool isCARCBridgableType() const; 1559 bool isTemplateTypeParmType() const; // C++ template type parameter 1560 bool isNullPtrType() const; // C++0x nullptr_t 1561 bool isAtomicType() const; // C11 _Atomic() 1562 1563 bool isImage1dT() const; // OpenCL image1d_t 1564 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1565 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1566 bool isImage2dT() const; // OpenCL image2d_t 1567 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1568 bool isImage3dT() const; // OpenCL image3d_t 1569 1570 bool isImageType() const; // Any OpenCL image type 1571 1572 bool isSamplerT() const; // OpenCL sampler_t 1573 bool isEventT() const; // OpenCL event_t 1574 1575 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1576 1577 /// Determines if this type, which must satisfy 1578 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1579 /// than implicitly __strong. 1580 bool isObjCARCImplicitlyUnretainedType() const; 1581 1582 /// Return the implicit lifetime for this type, which must not be dependent. 1583 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1584 1585 enum ScalarTypeKind { 1586 STK_CPointer, 1587 STK_BlockPointer, 1588 STK_ObjCObjectPointer, 1589 STK_MemberPointer, 1590 STK_Bool, 1591 STK_Integral, 1592 STK_Floating, 1593 STK_IntegralComplex, 1594 STK_FloatingComplex 1595 }; 1596 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1597 ScalarTypeKind getScalarTypeKind() const; 1598 1599 /// isDependentType - Whether this type is a dependent type, meaning 1600 /// that its definition somehow depends on a template parameter 1601 /// (C++ [temp.dep.type]). 1602 bool isDependentType() const { return TypeBits.Dependent; } 1603 1604 /// \brief Determine whether this type is an instantiation-dependent type, 1605 /// meaning that the type involves a template parameter (even if the 1606 /// definition does not actually depend on the type substituted for that 1607 /// template parameter). 1608 bool isInstantiationDependentType() const { 1609 return TypeBits.InstantiationDependent; 1610 } 1611 1612 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1613 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1614 1615 /// \brief Whether this type involves a variable-length array type 1616 /// with a definite size. 1617 bool hasSizedVLAType() const; 1618 1619 /// \brief Whether this type is or contains a local or unnamed type. 1620 bool hasUnnamedOrLocalType() const; 1621 1622 bool isOverloadableType() const; 1623 1624 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1625 bool isElaboratedTypeSpecifier() const; 1626 1627 bool canDecayToPointerType() const; 1628 1629 /// hasPointerRepresentation - Whether this type is represented 1630 /// natively as a pointer; this includes pointers, references, block 1631 /// pointers, and Objective-C interface, qualified id, and qualified 1632 /// interface types, as well as nullptr_t. 1633 bool hasPointerRepresentation() const; 1634 1635 /// hasObjCPointerRepresentation - Whether this type can represent 1636 /// an objective pointer type for the purpose of GC'ability 1637 bool hasObjCPointerRepresentation() const; 1638 1639 /// \brief Determine whether this type has an integer representation 1640 /// of some sort, e.g., it is an integer type or a vector. 1641 bool hasIntegerRepresentation() const; 1642 1643 /// \brief Determine whether this type has an signed integer representation 1644 /// of some sort, e.g., it is an signed integer type or a vector. 1645 bool hasSignedIntegerRepresentation() const; 1646 1647 /// \brief Determine whether this type has an unsigned integer representation 1648 /// of some sort, e.g., it is an unsigned integer type or a vector. 1649 bool hasUnsignedIntegerRepresentation() const; 1650 1651 /// \brief Determine whether this type has a floating-point representation 1652 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1653 bool hasFloatingRepresentation() const; 1654 1655 // Type Checking Functions: Check to see if this type is structurally the 1656 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1657 // the best type we can. 1658 const RecordType *getAsStructureType() const; 1659 /// NOTE: getAs*ArrayType are methods on ASTContext. 1660 const RecordType *getAsUnionType() const; 1661 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1662 // The following is a convenience method that returns an ObjCObjectPointerType 1663 // for object declared using an interface. 1664 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1665 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1666 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1667 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1668 1669 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1670 /// because the type is a RecordType or because it is the injected-class-name 1671 /// type of a class template or class template partial specialization. 1672 CXXRecordDecl *getAsCXXRecordDecl() const; 1673 1674 /// If this is a pointer or reference to a RecordType, return the 1675 /// CXXRecordDecl that that type refers to. 1676 /// 1677 /// If this is not a pointer or reference, or the type being pointed to does 1678 /// not refer to a CXXRecordDecl, returns NULL. 1679 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1680 1681 /// \brief Get the AutoType whose type will be deduced for a variable with 1682 /// an initializer of this type. This looks through declarators like pointer 1683 /// types, but not through decltype or typedefs. 1684 AutoType *getContainedAutoType() const; 1685 1686 /// Member-template getAs<specific type>'. Look through sugar for 1687 /// an instance of \<specific type>. This scheme will eventually 1688 /// replace the specific getAsXXXX methods above. 1689 /// 1690 /// There are some specializations of this member template listed 1691 /// immediately following this class. 1692 template <typename T> const T *getAs() const; 1693 1694 /// A variant of getAs<> for array types which silently discards 1695 /// qualifiers from the outermost type. 1696 const ArrayType *getAsArrayTypeUnsafe() const; 1697 1698 /// Member-template castAs<specific type>. Look through sugar for 1699 /// the underlying instance of \<specific type>. 1700 /// 1701 /// This method has the same relationship to getAs<T> as cast<T> has 1702 /// to dyn_cast<T>; which is to say, the underlying type *must* 1703 /// have the intended type, and this method will never return null. 1704 template <typename T> const T *castAs() const; 1705 1706 /// A variant of castAs<> for array type which silently discards 1707 /// qualifiers from the outermost type. 1708 const ArrayType *castAsArrayTypeUnsafe() const; 1709 1710 /// getBaseElementTypeUnsafe - Get the base element type of this 1711 /// type, potentially discarding type qualifiers. This method 1712 /// should never be used when type qualifiers are meaningful. 1713 const Type *getBaseElementTypeUnsafe() const; 1714 1715 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1716 /// element type of the array, potentially with type qualifiers missing. 1717 /// This method should never be used when type qualifiers are meaningful. 1718 const Type *getArrayElementTypeNoTypeQual() const; 1719 1720 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1721 /// pointer, this returns the respective pointee. 1722 QualType getPointeeType() const; 1723 1724 /// getUnqualifiedDesugaredType() - Return the specified type with 1725 /// any "sugar" removed from the type, removing any typedefs, 1726 /// typeofs, etc., as well as any qualifiers. 1727 const Type *getUnqualifiedDesugaredType() const; 1728 1729 /// More type predicates useful for type checking/promotion 1730 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1731 1732 /// isSignedIntegerType - Return true if this is an integer type that is 1733 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1734 /// or an enum decl which has a signed representation. 1735 bool isSignedIntegerType() const; 1736 1737 /// isUnsignedIntegerType - Return true if this is an integer type that is 1738 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1739 /// or an enum decl which has an unsigned representation. 1740 bool isUnsignedIntegerType() const; 1741 1742 /// Determines whether this is an integer type that is signed or an 1743 /// enumeration types whose underlying type is a signed integer type. 1744 bool isSignedIntegerOrEnumerationType() const; 1745 1746 /// Determines whether this is an integer type that is unsigned or an 1747 /// enumeration types whose underlying type is a unsigned integer type. 1748 bool isUnsignedIntegerOrEnumerationType() const; 1749 1750 /// isConstantSizeType - Return true if this is not a variable sized type, 1751 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1752 /// incomplete types. 1753 bool isConstantSizeType() const; 1754 1755 /// isSpecifierType - Returns true if this type can be represented by some 1756 /// set of type specifiers. 1757 bool isSpecifierType() const; 1758 1759 /// \brief Determine the linkage of this type. 1760 Linkage getLinkage() const; 1761 1762 /// \brief Determine the visibility of this type. 1763 Visibility getVisibility() const { 1764 return getLinkageAndVisibility().getVisibility(); 1765 } 1766 1767 /// \brief Return true if the visibility was explicitly set is the code. 1768 bool isVisibilityExplicit() const { 1769 return getLinkageAndVisibility().isVisibilityExplicit(); 1770 } 1771 1772 /// \brief Determine the linkage and visibility of this type. 1773 LinkageInfo getLinkageAndVisibility() const; 1774 1775 /// \brief True if the computed linkage is valid. Used for consistency 1776 /// checking. Should always return true. 1777 bool isLinkageValid() const; 1778 1779 const char *getTypeClassName() const; 1780 1781 QualType getCanonicalTypeInternal() const { 1782 return CanonicalType; 1783 } 1784 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1785 LLVM_ATTRIBUTE_USED void dump() const; 1786 1787 friend class ASTReader; 1788 friend class ASTWriter; 1789}; 1790 1791/// \brief This will check for a TypedefType by removing any existing sugar 1792/// until it reaches a TypedefType or a non-sugared type. 1793template <> const TypedefType *Type::getAs() const; 1794 1795/// \brief This will check for a TemplateSpecializationType by removing any 1796/// existing sugar until it reaches a TemplateSpecializationType or a 1797/// non-sugared type. 1798template <> const TemplateSpecializationType *Type::getAs() const; 1799 1800// We can do canonical leaf types faster, because we don't have to 1801// worry about preserving child type decoration. 1802#define TYPE(Class, Base) 1803#define LEAF_TYPE(Class) \ 1804template <> inline const Class##Type *Type::getAs() const { \ 1805 return dyn_cast<Class##Type>(CanonicalType); \ 1806} \ 1807template <> inline const Class##Type *Type::castAs() const { \ 1808 return cast<Class##Type>(CanonicalType); \ 1809} 1810#include "clang/AST/TypeNodes.def" 1811 1812 1813/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1814/// types are always canonical and have a literal name field. 1815class BuiltinType : public Type { 1816public: 1817 enum Kind { 1818#define BUILTIN_TYPE(Id, SingletonId) Id, 1819#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1820#include "clang/AST/BuiltinTypes.def" 1821 }; 1822 1823public: 1824 BuiltinType(Kind K) 1825 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1826 /*InstantiationDependent=*/(K == Dependent), 1827 /*VariablyModified=*/false, 1828 /*Unexpanded paramter pack=*/false) { 1829 BuiltinTypeBits.Kind = K; 1830 } 1831 1832 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1833 StringRef getName(const PrintingPolicy &Policy) const; 1834 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1835 // The StringRef is null-terminated. 1836 StringRef str = getName(Policy); 1837 assert(!str.empty() && str.data()[str.size()] == '\0'); 1838 return str.data(); 1839 } 1840 1841 bool isSugared() const { return false; } 1842 QualType desugar() const { return QualType(this, 0); } 1843 1844 bool isInteger() const { 1845 return getKind() >= Bool && getKind() <= Int128; 1846 } 1847 1848 bool isSignedInteger() const { 1849 return getKind() >= Char_S && getKind() <= Int128; 1850 } 1851 1852 bool isUnsignedInteger() const { 1853 return getKind() >= Bool && getKind() <= UInt128; 1854 } 1855 1856 bool isFloatingPoint() const { 1857 return getKind() >= Half && getKind() <= LongDouble; 1858 } 1859 1860 /// Determines whether the given kind corresponds to a placeholder type. 1861 static bool isPlaceholderTypeKind(Kind K) { 1862 return K >= Overload; 1863 } 1864 1865 /// Determines whether this type is a placeholder type, i.e. a type 1866 /// which cannot appear in arbitrary positions in a fully-formed 1867 /// expression. 1868 bool isPlaceholderType() const { 1869 return isPlaceholderTypeKind(getKind()); 1870 } 1871 1872 /// Determines whether this type is a placeholder type other than 1873 /// Overload. Most placeholder types require only syntactic 1874 /// information about their context in order to be resolved (e.g. 1875 /// whether it is a call expression), which means they can (and 1876 /// should) be resolved in an earlier "phase" of analysis. 1877 /// Overload expressions sometimes pick up further information 1878 /// from their context, like whether the context expects a 1879 /// specific function-pointer type, and so frequently need 1880 /// special treatment. 1881 bool isNonOverloadPlaceholderType() const { 1882 return getKind() > Overload; 1883 } 1884 1885 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1886}; 1887 1888/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1889/// types (_Complex float etc) as well as the GCC integer complex extensions. 1890/// 1891class ComplexType : public Type, public llvm::FoldingSetNode { 1892 QualType ElementType; 1893 ComplexType(QualType Element, QualType CanonicalPtr) : 1894 Type(Complex, CanonicalPtr, Element->isDependentType(), 1895 Element->isInstantiationDependentType(), 1896 Element->isVariablyModifiedType(), 1897 Element->containsUnexpandedParameterPack()), 1898 ElementType(Element) { 1899 } 1900 friend class ASTContext; // ASTContext creates these. 1901 1902public: 1903 QualType getElementType() const { return ElementType; } 1904 1905 bool isSugared() const { return false; } 1906 QualType desugar() const { return QualType(this, 0); } 1907 1908 void Profile(llvm::FoldingSetNodeID &ID) { 1909 Profile(ID, getElementType()); 1910 } 1911 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1912 ID.AddPointer(Element.getAsOpaquePtr()); 1913 } 1914 1915 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1916}; 1917 1918/// ParenType - Sugar for parentheses used when specifying types. 1919/// 1920class ParenType : public Type, public llvm::FoldingSetNode { 1921 QualType Inner; 1922 1923 ParenType(QualType InnerType, QualType CanonType) : 1924 Type(Paren, CanonType, InnerType->isDependentType(), 1925 InnerType->isInstantiationDependentType(), 1926 InnerType->isVariablyModifiedType(), 1927 InnerType->containsUnexpandedParameterPack()), 1928 Inner(InnerType) { 1929 } 1930 friend class ASTContext; // ASTContext creates these. 1931 1932public: 1933 1934 QualType getInnerType() const { return Inner; } 1935 1936 bool isSugared() const { return true; } 1937 QualType desugar() const { return getInnerType(); } 1938 1939 void Profile(llvm::FoldingSetNodeID &ID) { 1940 Profile(ID, getInnerType()); 1941 } 1942 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1943 Inner.Profile(ID); 1944 } 1945 1946 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1947}; 1948 1949/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1950/// 1951class PointerType : public Type, public llvm::FoldingSetNode { 1952 QualType PointeeType; 1953 1954 PointerType(QualType Pointee, QualType CanonicalPtr) : 1955 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1956 Pointee->isInstantiationDependentType(), 1957 Pointee->isVariablyModifiedType(), 1958 Pointee->containsUnexpandedParameterPack()), 1959 PointeeType(Pointee) { 1960 } 1961 friend class ASTContext; // ASTContext creates these. 1962 1963public: 1964 1965 QualType getPointeeType() const { return PointeeType; } 1966 1967 bool isSugared() const { return false; } 1968 QualType desugar() const { return QualType(this, 0); } 1969 1970 void Profile(llvm::FoldingSetNodeID &ID) { 1971 Profile(ID, getPointeeType()); 1972 } 1973 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1974 ID.AddPointer(Pointee.getAsOpaquePtr()); 1975 } 1976 1977 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1978}; 1979 1980/// BlockPointerType - pointer to a block type. 1981/// This type is to represent types syntactically represented as 1982/// "void (^)(int)", etc. Pointee is required to always be a function type. 1983/// 1984class BlockPointerType : public Type, public llvm::FoldingSetNode { 1985 QualType PointeeType; // Block is some kind of pointer type 1986 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1987 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1988 Pointee->isInstantiationDependentType(), 1989 Pointee->isVariablyModifiedType(), 1990 Pointee->containsUnexpandedParameterPack()), 1991 PointeeType(Pointee) { 1992 } 1993 friend class ASTContext; // ASTContext creates these. 1994 1995public: 1996 1997 // Get the pointee type. Pointee is required to always be a function type. 1998 QualType getPointeeType() const { return PointeeType; } 1999 2000 bool isSugared() const { return false; } 2001 QualType desugar() const { return QualType(this, 0); } 2002 2003 void Profile(llvm::FoldingSetNodeID &ID) { 2004 Profile(ID, getPointeeType()); 2005 } 2006 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2007 ID.AddPointer(Pointee.getAsOpaquePtr()); 2008 } 2009 2010 static bool classof(const Type *T) { 2011 return T->getTypeClass() == BlockPointer; 2012 } 2013}; 2014 2015/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2016/// 2017class ReferenceType : public Type, public llvm::FoldingSetNode { 2018 QualType PointeeType; 2019 2020protected: 2021 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2022 bool SpelledAsLValue) : 2023 Type(tc, CanonicalRef, Referencee->isDependentType(), 2024 Referencee->isInstantiationDependentType(), 2025 Referencee->isVariablyModifiedType(), 2026 Referencee->containsUnexpandedParameterPack()), 2027 PointeeType(Referencee) 2028 { 2029 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2030 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2031 } 2032 2033public: 2034 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2035 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2036 2037 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2038 QualType getPointeeType() const { 2039 // FIXME: this might strip inner qualifiers; okay? 2040 const ReferenceType *T = this; 2041 while (T->isInnerRef()) 2042 T = T->PointeeType->castAs<ReferenceType>(); 2043 return T->PointeeType; 2044 } 2045 2046 void Profile(llvm::FoldingSetNodeID &ID) { 2047 Profile(ID, PointeeType, isSpelledAsLValue()); 2048 } 2049 static void Profile(llvm::FoldingSetNodeID &ID, 2050 QualType Referencee, 2051 bool SpelledAsLValue) { 2052 ID.AddPointer(Referencee.getAsOpaquePtr()); 2053 ID.AddBoolean(SpelledAsLValue); 2054 } 2055 2056 static bool classof(const Type *T) { 2057 return T->getTypeClass() == LValueReference || 2058 T->getTypeClass() == RValueReference; 2059 } 2060}; 2061 2062/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2063/// 2064class LValueReferenceType : public ReferenceType { 2065 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2066 bool SpelledAsLValue) : 2067 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2068 {} 2069 friend class ASTContext; // ASTContext creates these 2070public: 2071 bool isSugared() const { return false; } 2072 QualType desugar() const { return QualType(this, 0); } 2073 2074 static bool classof(const Type *T) { 2075 return T->getTypeClass() == LValueReference; 2076 } 2077}; 2078 2079/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2080/// 2081class RValueReferenceType : public ReferenceType { 2082 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2083 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2084 } 2085 friend class ASTContext; // ASTContext creates these 2086public: 2087 bool isSugared() const { return false; } 2088 QualType desugar() const { return QualType(this, 0); } 2089 2090 static bool classof(const Type *T) { 2091 return T->getTypeClass() == RValueReference; 2092 } 2093}; 2094 2095/// The inheritance model to use for this member pointer. 2096enum MSInheritanceModel { 2097 IHM_Single, 2098 IHM_Multiple, 2099 IHM_Virtual, 2100 IHM_Unspecified 2101}; 2102 2103/// MemberPointerType - C++ 8.3.3 - Pointers to members 2104/// 2105class MemberPointerType : public Type, public llvm::FoldingSetNode { 2106 QualType PointeeType; 2107 /// The class of which the pointee is a member. Must ultimately be a 2108 /// RecordType, but could be a typedef or a template parameter too. 2109 const Type *Class; 2110 2111 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2112 Type(MemberPointer, CanonicalPtr, 2113 Cls->isDependentType() || Pointee->isDependentType(), 2114 (Cls->isInstantiationDependentType() || 2115 Pointee->isInstantiationDependentType()), 2116 Pointee->isVariablyModifiedType(), 2117 (Cls->containsUnexpandedParameterPack() || 2118 Pointee->containsUnexpandedParameterPack())), 2119 PointeeType(Pointee), Class(Cls) { 2120 } 2121 friend class ASTContext; // ASTContext creates these. 2122 2123public: 2124 QualType getPointeeType() const { return PointeeType; } 2125 2126 /// Returns true if the member type (i.e. the pointee type) is a 2127 /// function type rather than a data-member type. 2128 bool isMemberFunctionPointer() const { 2129 return PointeeType->isFunctionProtoType(); 2130 } 2131 2132 /// Returns true if the member type (i.e. the pointee type) is a 2133 /// data type rather than a function type. 2134 bool isMemberDataPointer() const { 2135 return !PointeeType->isFunctionProtoType(); 2136 } 2137 2138 /// Returns the number of pointer and integer slots used to represent this 2139 /// member pointer in the MS C++ ABI. 2140 std::pair<unsigned, unsigned> getMSMemberPointerSlots() const; 2141 2142 const Type *getClass() const { return Class; } 2143 2144 bool isSugared() const { return false; } 2145 QualType desugar() const { return QualType(this, 0); } 2146 2147 void Profile(llvm::FoldingSetNodeID &ID) { 2148 Profile(ID, getPointeeType(), getClass()); 2149 } 2150 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2151 const Type *Class) { 2152 ID.AddPointer(Pointee.getAsOpaquePtr()); 2153 ID.AddPointer(Class); 2154 } 2155 2156 static bool classof(const Type *T) { 2157 return T->getTypeClass() == MemberPointer; 2158 } 2159}; 2160 2161/// ArrayType - C99 6.7.5.2 - Array Declarators. 2162/// 2163class ArrayType : public Type, public llvm::FoldingSetNode { 2164public: 2165 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2166 /// an array with a static size (e.g. int X[static 4]), or an array 2167 /// with a star size (e.g. int X[*]). 2168 /// 'static' is only allowed on function parameters. 2169 enum ArraySizeModifier { 2170 Normal, Static, Star 2171 }; 2172private: 2173 /// ElementType - The element type of the array. 2174 QualType ElementType; 2175 2176protected: 2177 // C++ [temp.dep.type]p1: 2178 // A type is dependent if it is... 2179 // - an array type constructed from any dependent type or whose 2180 // size is specified by a constant expression that is 2181 // value-dependent, 2182 ArrayType(TypeClass tc, QualType et, QualType can, 2183 ArraySizeModifier sm, unsigned tq, 2184 bool ContainsUnexpandedParameterPack) 2185 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2186 et->isInstantiationDependentType() || tc == DependentSizedArray, 2187 (tc == VariableArray || et->isVariablyModifiedType()), 2188 ContainsUnexpandedParameterPack), 2189 ElementType(et) { 2190 ArrayTypeBits.IndexTypeQuals = tq; 2191 ArrayTypeBits.SizeModifier = sm; 2192 } 2193 2194 friend class ASTContext; // ASTContext creates these. 2195 2196public: 2197 QualType getElementType() const { return ElementType; } 2198 ArraySizeModifier getSizeModifier() const { 2199 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2200 } 2201 Qualifiers getIndexTypeQualifiers() const { 2202 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2203 } 2204 unsigned getIndexTypeCVRQualifiers() const { 2205 return ArrayTypeBits.IndexTypeQuals; 2206 } 2207 2208 static bool classof(const Type *T) { 2209 return T->getTypeClass() == ConstantArray || 2210 T->getTypeClass() == VariableArray || 2211 T->getTypeClass() == IncompleteArray || 2212 T->getTypeClass() == DependentSizedArray; 2213 } 2214}; 2215 2216/// ConstantArrayType - This class represents the canonical version of 2217/// C arrays with a specified constant size. For example, the canonical 2218/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2219/// type is 'int' and the size is 404. 2220class ConstantArrayType : public ArrayType { 2221 llvm::APInt Size; // Allows us to unique the type. 2222 2223 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2224 ArraySizeModifier sm, unsigned tq) 2225 : ArrayType(ConstantArray, et, can, sm, tq, 2226 et->containsUnexpandedParameterPack()), 2227 Size(size) {} 2228protected: 2229 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2230 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2231 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2232 Size(size) {} 2233 friend class ASTContext; // ASTContext creates these. 2234public: 2235 const llvm::APInt &getSize() const { return Size; } 2236 bool isSugared() const { return false; } 2237 QualType desugar() const { return QualType(this, 0); } 2238 2239 2240 /// \brief Determine the number of bits required to address a member of 2241 // an array with the given element type and number of elements. 2242 static unsigned getNumAddressingBits(ASTContext &Context, 2243 QualType ElementType, 2244 const llvm::APInt &NumElements); 2245 2246 /// \brief Determine the maximum number of active bits that an array's size 2247 /// can require, which limits the maximum size of the array. 2248 static unsigned getMaxSizeBits(ASTContext &Context); 2249 2250 void Profile(llvm::FoldingSetNodeID &ID) { 2251 Profile(ID, getElementType(), getSize(), 2252 getSizeModifier(), getIndexTypeCVRQualifiers()); 2253 } 2254 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2255 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2256 unsigned TypeQuals) { 2257 ID.AddPointer(ET.getAsOpaquePtr()); 2258 ID.AddInteger(ArraySize.getZExtValue()); 2259 ID.AddInteger(SizeMod); 2260 ID.AddInteger(TypeQuals); 2261 } 2262 static bool classof(const Type *T) { 2263 return T->getTypeClass() == ConstantArray; 2264 } 2265}; 2266 2267/// IncompleteArrayType - This class represents C arrays with an unspecified 2268/// size. For example 'int A[]' has an IncompleteArrayType where the element 2269/// type is 'int' and the size is unspecified. 2270class IncompleteArrayType : public ArrayType { 2271 2272 IncompleteArrayType(QualType et, QualType can, 2273 ArraySizeModifier sm, unsigned tq) 2274 : ArrayType(IncompleteArray, et, can, sm, tq, 2275 et->containsUnexpandedParameterPack()) {} 2276 friend class ASTContext; // ASTContext creates these. 2277public: 2278 bool isSugared() const { return false; } 2279 QualType desugar() const { return QualType(this, 0); } 2280 2281 static bool classof(const Type *T) { 2282 return T->getTypeClass() == IncompleteArray; 2283 } 2284 2285 friend class StmtIteratorBase; 2286 2287 void Profile(llvm::FoldingSetNodeID &ID) { 2288 Profile(ID, getElementType(), getSizeModifier(), 2289 getIndexTypeCVRQualifiers()); 2290 } 2291 2292 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2293 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2294 ID.AddPointer(ET.getAsOpaquePtr()); 2295 ID.AddInteger(SizeMod); 2296 ID.AddInteger(TypeQuals); 2297 } 2298}; 2299 2300/// VariableArrayType - This class represents C arrays with a specified size 2301/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2302/// Since the size expression is an arbitrary expression, we store it as such. 2303/// 2304/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2305/// should not be: two lexically equivalent variable array types could mean 2306/// different things, for example, these variables do not have the same type 2307/// dynamically: 2308/// 2309/// void foo(int x) { 2310/// int Y[x]; 2311/// ++x; 2312/// int Z[x]; 2313/// } 2314/// 2315class VariableArrayType : public ArrayType { 2316 /// SizeExpr - An assignment expression. VLA's are only permitted within 2317 /// a function block. 2318 Stmt *SizeExpr; 2319 /// Brackets - The left and right array brackets. 2320 SourceRange Brackets; 2321 2322 VariableArrayType(QualType et, QualType can, Expr *e, 2323 ArraySizeModifier sm, unsigned tq, 2324 SourceRange brackets) 2325 : ArrayType(VariableArray, et, can, sm, tq, 2326 et->containsUnexpandedParameterPack()), 2327 SizeExpr((Stmt*) e), Brackets(brackets) {} 2328 friend class ASTContext; // ASTContext creates these. 2329 2330public: 2331 Expr *getSizeExpr() const { 2332 // We use C-style casts instead of cast<> here because we do not wish 2333 // to have a dependency of Type.h on Stmt.h/Expr.h. 2334 return (Expr*) SizeExpr; 2335 } 2336 SourceRange getBracketsRange() const { return Brackets; } 2337 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2338 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2339 2340 bool isSugared() const { return false; } 2341 QualType desugar() const { return QualType(this, 0); } 2342 2343 static bool classof(const Type *T) { 2344 return T->getTypeClass() == VariableArray; 2345 } 2346 2347 friend class StmtIteratorBase; 2348 2349 void Profile(llvm::FoldingSetNodeID &ID) { 2350 llvm_unreachable("Cannot unique VariableArrayTypes."); 2351 } 2352}; 2353 2354/// DependentSizedArrayType - This type represents an array type in 2355/// C++ whose size is a value-dependent expression. For example: 2356/// 2357/// \code 2358/// template<typename T, int Size> 2359/// class array { 2360/// T data[Size]; 2361/// }; 2362/// \endcode 2363/// 2364/// For these types, we won't actually know what the array bound is 2365/// until template instantiation occurs, at which point this will 2366/// become either a ConstantArrayType or a VariableArrayType. 2367class DependentSizedArrayType : public ArrayType { 2368 const ASTContext &Context; 2369 2370 /// \brief An assignment expression that will instantiate to the 2371 /// size of the array. 2372 /// 2373 /// The expression itself might be NULL, in which case the array 2374 /// type will have its size deduced from an initializer. 2375 Stmt *SizeExpr; 2376 2377 /// Brackets - The left and right array brackets. 2378 SourceRange Brackets; 2379 2380 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2381 Expr *e, ArraySizeModifier sm, unsigned tq, 2382 SourceRange brackets); 2383 2384 friend class ASTContext; // ASTContext creates these. 2385 2386public: 2387 Expr *getSizeExpr() const { 2388 // We use C-style casts instead of cast<> here because we do not wish 2389 // to have a dependency of Type.h on Stmt.h/Expr.h. 2390 return (Expr*) SizeExpr; 2391 } 2392 SourceRange getBracketsRange() const { return Brackets; } 2393 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2394 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2395 2396 bool isSugared() const { return false; } 2397 QualType desugar() const { return QualType(this, 0); } 2398 2399 static bool classof(const Type *T) { 2400 return T->getTypeClass() == DependentSizedArray; 2401 } 2402 2403 friend class StmtIteratorBase; 2404 2405 2406 void Profile(llvm::FoldingSetNodeID &ID) { 2407 Profile(ID, Context, getElementType(), 2408 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2409 } 2410 2411 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2412 QualType ET, ArraySizeModifier SizeMod, 2413 unsigned TypeQuals, Expr *E); 2414}; 2415 2416/// DependentSizedExtVectorType - This type represent an extended vector type 2417/// where either the type or size is dependent. For example: 2418/// @code 2419/// template<typename T, int Size> 2420/// class vector { 2421/// typedef T __attribute__((ext_vector_type(Size))) type; 2422/// } 2423/// @endcode 2424class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2425 const ASTContext &Context; 2426 Expr *SizeExpr; 2427 /// ElementType - The element type of the array. 2428 QualType ElementType; 2429 SourceLocation loc; 2430 2431 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2432 QualType can, Expr *SizeExpr, SourceLocation loc); 2433 2434 friend class ASTContext; 2435 2436public: 2437 Expr *getSizeExpr() const { return SizeExpr; } 2438 QualType getElementType() const { return ElementType; } 2439 SourceLocation getAttributeLoc() const { return loc; } 2440 2441 bool isSugared() const { return false; } 2442 QualType desugar() const { return QualType(this, 0); } 2443 2444 static bool classof(const Type *T) { 2445 return T->getTypeClass() == DependentSizedExtVector; 2446 } 2447 2448 void Profile(llvm::FoldingSetNodeID &ID) { 2449 Profile(ID, Context, getElementType(), getSizeExpr()); 2450 } 2451 2452 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2453 QualType ElementType, Expr *SizeExpr); 2454}; 2455 2456 2457/// VectorType - GCC generic vector type. This type is created using 2458/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2459/// bytes; or from an Altivec __vector or vector declaration. 2460/// Since the constructor takes the number of vector elements, the 2461/// client is responsible for converting the size into the number of elements. 2462class VectorType : public Type, public llvm::FoldingSetNode { 2463public: 2464 enum VectorKind { 2465 GenericVector, // not a target-specific vector type 2466 AltiVecVector, // is AltiVec vector 2467 AltiVecPixel, // is AltiVec 'vector Pixel' 2468 AltiVecBool, // is AltiVec 'vector bool ...' 2469 NeonVector, // is ARM Neon vector 2470 NeonPolyVector // is ARM Neon polynomial vector 2471 }; 2472protected: 2473 /// ElementType - The element type of the vector. 2474 QualType ElementType; 2475 2476 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2477 VectorKind vecKind); 2478 2479 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2480 QualType canonType, VectorKind vecKind); 2481 2482 friend class ASTContext; // ASTContext creates these. 2483 2484public: 2485 2486 QualType getElementType() const { return ElementType; } 2487 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2488 2489 bool isSugared() const { return false; } 2490 QualType desugar() const { return QualType(this, 0); } 2491 2492 VectorKind getVectorKind() const { 2493 return VectorKind(VectorTypeBits.VecKind); 2494 } 2495 2496 void Profile(llvm::FoldingSetNodeID &ID) { 2497 Profile(ID, getElementType(), getNumElements(), 2498 getTypeClass(), getVectorKind()); 2499 } 2500 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2501 unsigned NumElements, TypeClass TypeClass, 2502 VectorKind VecKind) { 2503 ID.AddPointer(ElementType.getAsOpaquePtr()); 2504 ID.AddInteger(NumElements); 2505 ID.AddInteger(TypeClass); 2506 ID.AddInteger(VecKind); 2507 } 2508 2509 static bool classof(const Type *T) { 2510 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2511 } 2512}; 2513 2514/// ExtVectorType - Extended vector type. This type is created using 2515/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2516/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2517/// class enables syntactic extensions, like Vector Components for accessing 2518/// points, colors, and textures (modeled after OpenGL Shading Language). 2519class ExtVectorType : public VectorType { 2520 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2521 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2522 friend class ASTContext; // ASTContext creates these. 2523public: 2524 static int getPointAccessorIdx(char c) { 2525 switch (c) { 2526 default: return -1; 2527 case 'x': return 0; 2528 case 'y': return 1; 2529 case 'z': return 2; 2530 case 'w': return 3; 2531 } 2532 } 2533 static int getNumericAccessorIdx(char c) { 2534 switch (c) { 2535 default: return -1; 2536 case '0': return 0; 2537 case '1': return 1; 2538 case '2': return 2; 2539 case '3': return 3; 2540 case '4': return 4; 2541 case '5': return 5; 2542 case '6': return 6; 2543 case '7': return 7; 2544 case '8': return 8; 2545 case '9': return 9; 2546 case 'A': 2547 case 'a': return 10; 2548 case 'B': 2549 case 'b': return 11; 2550 case 'C': 2551 case 'c': return 12; 2552 case 'D': 2553 case 'd': return 13; 2554 case 'E': 2555 case 'e': return 14; 2556 case 'F': 2557 case 'f': return 15; 2558 } 2559 } 2560 2561 static int getAccessorIdx(char c) { 2562 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2563 return getNumericAccessorIdx(c); 2564 } 2565 2566 bool isAccessorWithinNumElements(char c) const { 2567 if (int idx = getAccessorIdx(c)+1) 2568 return unsigned(idx-1) < getNumElements(); 2569 return false; 2570 } 2571 bool isSugared() const { return false; } 2572 QualType desugar() const { return QualType(this, 0); } 2573 2574 static bool classof(const Type *T) { 2575 return T->getTypeClass() == ExtVector; 2576 } 2577}; 2578 2579/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2580/// class of FunctionNoProtoType and FunctionProtoType. 2581/// 2582class FunctionType : public Type { 2583 // The type returned by the function. 2584 QualType ResultType; 2585 2586 public: 2587 /// ExtInfo - A class which abstracts out some details necessary for 2588 /// making a call. 2589 /// 2590 /// It is not actually used directly for storing this information in 2591 /// a FunctionType, although FunctionType does currently use the 2592 /// same bit-pattern. 2593 /// 2594 // If you add a field (say Foo), other than the obvious places (both, 2595 // constructors, compile failures), what you need to update is 2596 // * Operator== 2597 // * getFoo 2598 // * withFoo 2599 // * functionType. Add Foo, getFoo. 2600 // * ASTContext::getFooType 2601 // * ASTContext::mergeFunctionTypes 2602 // * FunctionNoProtoType::Profile 2603 // * FunctionProtoType::Profile 2604 // * TypePrinter::PrintFunctionProto 2605 // * AST read and write 2606 // * Codegen 2607 class ExtInfo { 2608 // Feel free to rearrange or add bits, but if you go over 9, 2609 // you'll need to adjust both the Bits field below and 2610 // Type::FunctionTypeBitfields. 2611 2612 // | CC |noreturn|produces|regparm| 2613 // |0 .. 3| 4 | 5 | 6 .. 8| 2614 // 2615 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2616 enum { CallConvMask = 0xF }; 2617 enum { NoReturnMask = 0x10 }; 2618 enum { ProducesResultMask = 0x20 }; 2619 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2620 RegParmOffset = 6 }; // Assumed to be the last field 2621 2622 uint16_t Bits; 2623 2624 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2625 2626 friend class FunctionType; 2627 2628 public: 2629 // Constructor with no defaults. Use this when you know that you 2630 // have all the elements (when reading an AST file for example). 2631 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2632 bool producesResult) { 2633 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2634 Bits = ((unsigned) cc) | 2635 (noReturn ? NoReturnMask : 0) | 2636 (producesResult ? ProducesResultMask : 0) | 2637 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2638 } 2639 2640 // Constructor with all defaults. Use when for example creating a 2641 // function know to use defaults. 2642 ExtInfo() : Bits(0) {} 2643 2644 bool getNoReturn() const { return Bits & NoReturnMask; } 2645 bool getProducesResult() const { return Bits & ProducesResultMask; } 2646 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2647 unsigned getRegParm() const { 2648 unsigned RegParm = Bits >> RegParmOffset; 2649 if (RegParm > 0) 2650 --RegParm; 2651 return RegParm; 2652 } 2653 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2654 2655 bool operator==(ExtInfo Other) const { 2656 return Bits == Other.Bits; 2657 } 2658 bool operator!=(ExtInfo Other) const { 2659 return Bits != Other.Bits; 2660 } 2661 2662 // Note that we don't have setters. That is by design, use 2663 // the following with methods instead of mutating these objects. 2664 2665 ExtInfo withNoReturn(bool noReturn) const { 2666 if (noReturn) 2667 return ExtInfo(Bits | NoReturnMask); 2668 else 2669 return ExtInfo(Bits & ~NoReturnMask); 2670 } 2671 2672 ExtInfo withProducesResult(bool producesResult) const { 2673 if (producesResult) 2674 return ExtInfo(Bits | ProducesResultMask); 2675 else 2676 return ExtInfo(Bits & ~ProducesResultMask); 2677 } 2678 2679 ExtInfo withRegParm(unsigned RegParm) const { 2680 assert(RegParm < 7 && "Invalid regparm value"); 2681 return ExtInfo((Bits & ~RegParmMask) | 2682 ((RegParm + 1) << RegParmOffset)); 2683 } 2684 2685 ExtInfo withCallingConv(CallingConv cc) const { 2686 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2687 } 2688 2689 void Profile(llvm::FoldingSetNodeID &ID) const { 2690 ID.AddInteger(Bits); 2691 } 2692 }; 2693 2694protected: 2695 FunctionType(TypeClass tc, QualType res, 2696 unsigned typeQuals, QualType Canonical, bool Dependent, 2697 bool InstantiationDependent, 2698 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2699 ExtInfo Info) 2700 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2701 ContainsUnexpandedParameterPack), 2702 ResultType(res) { 2703 FunctionTypeBits.ExtInfo = Info.Bits; 2704 FunctionTypeBits.TypeQuals = typeQuals; 2705 } 2706 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2707 2708public: 2709 2710 QualType getResultType() const { return ResultType; } 2711 2712 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2713 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2714 /// \brief Determine whether this function type includes the GNU noreturn 2715 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2716 /// type. 2717 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2718 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2719 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2720 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2721 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2722 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2723 2724 /// \brief Determine the type of an expression that calls a function of 2725 /// this type. 2726 QualType getCallResultType(ASTContext &Context) const { 2727 return getResultType().getNonLValueExprType(Context); 2728 } 2729 2730 static StringRef getNameForCallConv(CallingConv CC); 2731 2732 static bool classof(const Type *T) { 2733 return T->getTypeClass() == FunctionNoProto || 2734 T->getTypeClass() == FunctionProto; 2735 } 2736}; 2737 2738/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2739/// no information available about its arguments. 2740class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2741 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2742 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2743 /*Dependent=*/false, /*InstantiationDependent=*/false, 2744 Result->isVariablyModifiedType(), 2745 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2746 2747 friend class ASTContext; // ASTContext creates these. 2748 2749public: 2750 // No additional state past what FunctionType provides. 2751 2752 bool isSugared() const { return false; } 2753 QualType desugar() const { return QualType(this, 0); } 2754 2755 void Profile(llvm::FoldingSetNodeID &ID) { 2756 Profile(ID, getResultType(), getExtInfo()); 2757 } 2758 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2759 ExtInfo Info) { 2760 Info.Profile(ID); 2761 ID.AddPointer(ResultType.getAsOpaquePtr()); 2762 } 2763 2764 static bool classof(const Type *T) { 2765 return T->getTypeClass() == FunctionNoProto; 2766 } 2767}; 2768 2769/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2770/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2771/// arguments, not as having a single void argument. Such a type can have an 2772/// exception specification, but this specification is not part of the canonical 2773/// type. 2774class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2775public: 2776 /// ExtProtoInfo - Extra information about a function prototype. 2777 struct ExtProtoInfo { 2778 ExtProtoInfo() : 2779 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2780 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2781 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2782 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2783 ConsumedArguments(0) {} 2784 2785 FunctionType::ExtInfo ExtInfo; 2786 bool Variadic : 1; 2787 bool HasTrailingReturn : 1; 2788 unsigned char TypeQuals; 2789 ExceptionSpecificationType ExceptionSpecType; 2790 RefQualifierKind RefQualifier; 2791 unsigned NumExceptions; 2792 const QualType *Exceptions; 2793 Expr *NoexceptExpr; 2794 FunctionDecl *ExceptionSpecDecl; 2795 FunctionDecl *ExceptionSpecTemplate; 2796 const bool *ConsumedArguments; 2797 }; 2798 2799private: 2800 /// \brief Determine whether there are any argument types that 2801 /// contain an unexpanded parameter pack. 2802 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2803 unsigned numArgs) { 2804 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2805 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2806 return true; 2807 2808 return false; 2809 } 2810 2811 FunctionProtoType(QualType result, ArrayRef<QualType> args, 2812 QualType canonical, const ExtProtoInfo &epi); 2813 2814 /// NumArgs - The number of arguments this function has, not counting '...'. 2815 unsigned NumArgs : 15; 2816 2817 /// NumExceptions - The number of types in the exception spec, if any. 2818 unsigned NumExceptions : 9; 2819 2820 /// ExceptionSpecType - The type of exception specification this function has. 2821 unsigned ExceptionSpecType : 3; 2822 2823 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2824 unsigned HasAnyConsumedArgs : 1; 2825 2826 /// Variadic - Whether the function is variadic. 2827 unsigned Variadic : 1; 2828 2829 /// HasTrailingReturn - Whether this function has a trailing return type. 2830 unsigned HasTrailingReturn : 1; 2831 2832 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2833 /// 2834 /// This is a value of type \c RefQualifierKind. 2835 unsigned RefQualifier : 2; 2836 2837 // ArgInfo - There is an variable size array after the class in memory that 2838 // holds the argument types. 2839 2840 // Exceptions - There is another variable size array after ArgInfo that 2841 // holds the exception types. 2842 2843 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2844 // to the expression in the noexcept() specifier. 2845 2846 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2847 // be a pair of FunctionDecl* pointing to the function which should be used to 2848 // instantiate this function type's exception specification, and the function 2849 // from which it should be instantiated. 2850 2851 // ConsumedArgs - A variable size array, following Exceptions 2852 // and of length NumArgs, holding flags indicating which arguments 2853 // are consumed. This only appears if HasAnyConsumedArgs is true. 2854 2855 friend class ASTContext; // ASTContext creates these. 2856 2857 const bool *getConsumedArgsBuffer() const { 2858 assert(hasAnyConsumedArgs()); 2859 2860 // Find the end of the exceptions. 2861 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2862 if (getExceptionSpecType() != EST_ComputedNoexcept) 2863 eh_end += NumExceptions; 2864 else 2865 eh_end += 1; // NoexceptExpr 2866 2867 return reinterpret_cast<const bool*>(eh_end); 2868 } 2869 2870public: 2871 unsigned getNumArgs() const { return NumArgs; } 2872 QualType getArgType(unsigned i) const { 2873 assert(i < NumArgs && "Invalid argument number!"); 2874 return arg_type_begin()[i]; 2875 } 2876 ArrayRef<QualType> getArgTypes() const { 2877 return ArrayRef<QualType>(arg_type_begin(), arg_type_end()); 2878 } 2879 2880 ExtProtoInfo getExtProtoInfo() const { 2881 ExtProtoInfo EPI; 2882 EPI.ExtInfo = getExtInfo(); 2883 EPI.Variadic = isVariadic(); 2884 EPI.HasTrailingReturn = hasTrailingReturn(); 2885 EPI.ExceptionSpecType = getExceptionSpecType(); 2886 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2887 EPI.RefQualifier = getRefQualifier(); 2888 if (EPI.ExceptionSpecType == EST_Dynamic) { 2889 EPI.NumExceptions = NumExceptions; 2890 EPI.Exceptions = exception_begin(); 2891 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2892 EPI.NoexceptExpr = getNoexceptExpr(); 2893 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2894 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2895 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2896 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2897 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2898 } 2899 if (hasAnyConsumedArgs()) 2900 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2901 return EPI; 2902 } 2903 2904 /// \brief Get the kind of exception specification on this function. 2905 ExceptionSpecificationType getExceptionSpecType() const { 2906 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2907 } 2908 /// \brief Return whether this function has any kind of exception spec. 2909 bool hasExceptionSpec() const { 2910 return getExceptionSpecType() != EST_None; 2911 } 2912 /// \brief Return whether this function has a dynamic (throw) exception spec. 2913 bool hasDynamicExceptionSpec() const { 2914 return isDynamicExceptionSpec(getExceptionSpecType()); 2915 } 2916 /// \brief Return whether this function has a noexcept exception spec. 2917 bool hasNoexceptExceptionSpec() const { 2918 return isNoexceptExceptionSpec(getExceptionSpecType()); 2919 } 2920 /// \brief Result type of getNoexceptSpec(). 2921 enum NoexceptResult { 2922 NR_NoNoexcept, ///< There is no noexcept specifier. 2923 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2924 NR_Dependent, ///< The noexcept specifier is dependent. 2925 NR_Throw, ///< The noexcept specifier evaluates to false. 2926 NR_Nothrow ///< The noexcept specifier evaluates to true. 2927 }; 2928 /// \brief Get the meaning of the noexcept spec on this function, if any. 2929 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2930 unsigned getNumExceptions() const { return NumExceptions; } 2931 QualType getExceptionType(unsigned i) const { 2932 assert(i < NumExceptions && "Invalid exception number!"); 2933 return exception_begin()[i]; 2934 } 2935 Expr *getNoexceptExpr() const { 2936 if (getExceptionSpecType() != EST_ComputedNoexcept) 2937 return 0; 2938 // NoexceptExpr sits where the arguments end. 2939 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2940 } 2941 /// \brief If this function type has an exception specification which hasn't 2942 /// been determined yet (either because it has not been evaluated or because 2943 /// it has not been instantiated), this is the function whose exception 2944 /// specification is represented by this type. 2945 FunctionDecl *getExceptionSpecDecl() const { 2946 if (getExceptionSpecType() != EST_Uninstantiated && 2947 getExceptionSpecType() != EST_Unevaluated) 2948 return 0; 2949 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2950 } 2951 /// \brief If this function type has an uninstantiated exception 2952 /// specification, this is the function whose exception specification 2953 /// should be instantiated to find the exception specification for 2954 /// this type. 2955 FunctionDecl *getExceptionSpecTemplate() const { 2956 if (getExceptionSpecType() != EST_Uninstantiated) 2957 return 0; 2958 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2959 } 2960 bool isNothrow(ASTContext &Ctx) const { 2961 ExceptionSpecificationType EST = getExceptionSpecType(); 2962 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2963 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2964 return true; 2965 if (EST != EST_ComputedNoexcept) 2966 return false; 2967 return getNoexceptSpec(Ctx) == NR_Nothrow; 2968 } 2969 2970 bool isVariadic() const { return Variadic; } 2971 2972 /// \brief Determines whether this function prototype contains a 2973 /// parameter pack at the end. 2974 /// 2975 /// A function template whose last parameter is a parameter pack can be 2976 /// called with an arbitrary number of arguments, much like a variadic 2977 /// function. 2978 bool isTemplateVariadic() const; 2979 2980 bool hasTrailingReturn() const { return HasTrailingReturn; } 2981 2982 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2983 2984 2985 /// \brief Retrieve the ref-qualifier associated with this function type. 2986 RefQualifierKind getRefQualifier() const { 2987 return static_cast<RefQualifierKind>(RefQualifier); 2988 } 2989 2990 typedef const QualType *arg_type_iterator; 2991 arg_type_iterator arg_type_begin() const { 2992 return reinterpret_cast<const QualType *>(this+1); 2993 } 2994 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2995 2996 typedef const QualType *exception_iterator; 2997 exception_iterator exception_begin() const { 2998 // exceptions begin where arguments end 2999 return arg_type_end(); 3000 } 3001 exception_iterator exception_end() const { 3002 if (getExceptionSpecType() != EST_Dynamic) 3003 return exception_begin(); 3004 return exception_begin() + NumExceptions; 3005 } 3006 3007 bool hasAnyConsumedArgs() const { 3008 return HasAnyConsumedArgs; 3009 } 3010 bool isArgConsumed(unsigned I) const { 3011 assert(I < getNumArgs() && "argument index out of range!"); 3012 if (hasAnyConsumedArgs()) 3013 return getConsumedArgsBuffer()[I]; 3014 return false; 3015 } 3016 3017 bool isSugared() const { return false; } 3018 QualType desugar() const { return QualType(this, 0); } 3019 3020 void printExceptionSpecification(raw_ostream &OS, 3021 const PrintingPolicy &Policy) const; 3022 3023 static bool classof(const Type *T) { 3024 return T->getTypeClass() == FunctionProto; 3025 } 3026 3027 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3028 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3029 arg_type_iterator ArgTys, unsigned NumArgs, 3030 const ExtProtoInfo &EPI, const ASTContext &Context); 3031}; 3032 3033 3034/// \brief Represents the dependent type named by a dependently-scoped 3035/// typename using declaration, e.g. 3036/// using typename Base<T>::foo; 3037/// Template instantiation turns these into the underlying type. 3038class UnresolvedUsingType : public Type { 3039 UnresolvedUsingTypenameDecl *Decl; 3040 3041 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3042 : Type(UnresolvedUsing, QualType(), true, true, false, 3043 /*ContainsUnexpandedParameterPack=*/false), 3044 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3045 friend class ASTContext; // ASTContext creates these. 3046public: 3047 3048 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3049 3050 bool isSugared() const { return false; } 3051 QualType desugar() const { return QualType(this, 0); } 3052 3053 static bool classof(const Type *T) { 3054 return T->getTypeClass() == UnresolvedUsing; 3055 } 3056 3057 void Profile(llvm::FoldingSetNodeID &ID) { 3058 return Profile(ID, Decl); 3059 } 3060 static void Profile(llvm::FoldingSetNodeID &ID, 3061 UnresolvedUsingTypenameDecl *D) { 3062 ID.AddPointer(D); 3063 } 3064}; 3065 3066 3067class TypedefType : public Type { 3068 TypedefNameDecl *Decl; 3069protected: 3070 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3071 : Type(tc, can, can->isDependentType(), 3072 can->isInstantiationDependentType(), 3073 can->isVariablyModifiedType(), 3074 /*ContainsUnexpandedParameterPack=*/false), 3075 Decl(const_cast<TypedefNameDecl*>(D)) { 3076 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3077 } 3078 friend class ASTContext; // ASTContext creates these. 3079public: 3080 3081 TypedefNameDecl *getDecl() const { return Decl; } 3082 3083 bool isSugared() const { return true; } 3084 QualType desugar() const; 3085 3086 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3087}; 3088 3089/// TypeOfExprType (GCC extension). 3090class TypeOfExprType : public Type { 3091 Expr *TOExpr; 3092 3093protected: 3094 TypeOfExprType(Expr *E, QualType can = QualType()); 3095 friend class ASTContext; // ASTContext creates these. 3096public: 3097 Expr *getUnderlyingExpr() const { return TOExpr; } 3098 3099 /// \brief Remove a single level of sugar. 3100 QualType desugar() const; 3101 3102 /// \brief Returns whether this type directly provides sugar. 3103 bool isSugared() const; 3104 3105 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3106}; 3107 3108/// \brief Internal representation of canonical, dependent 3109/// typeof(expr) types. 3110/// 3111/// This class is used internally by the ASTContext to manage 3112/// canonical, dependent types, only. Clients will only see instances 3113/// of this class via TypeOfExprType nodes. 3114class DependentTypeOfExprType 3115 : public TypeOfExprType, public llvm::FoldingSetNode { 3116 const ASTContext &Context; 3117 3118public: 3119 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3120 : TypeOfExprType(E), Context(Context) { } 3121 3122 void Profile(llvm::FoldingSetNodeID &ID) { 3123 Profile(ID, Context, getUnderlyingExpr()); 3124 } 3125 3126 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3127 Expr *E); 3128}; 3129 3130/// TypeOfType (GCC extension). 3131class TypeOfType : public Type { 3132 QualType TOType; 3133 TypeOfType(QualType T, QualType can) 3134 : Type(TypeOf, can, T->isDependentType(), 3135 T->isInstantiationDependentType(), 3136 T->isVariablyModifiedType(), 3137 T->containsUnexpandedParameterPack()), 3138 TOType(T) { 3139 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3140 } 3141 friend class ASTContext; // ASTContext creates these. 3142public: 3143 QualType getUnderlyingType() const { return TOType; } 3144 3145 /// \brief Remove a single level of sugar. 3146 QualType desugar() const { return getUnderlyingType(); } 3147 3148 /// \brief Returns whether this type directly provides sugar. 3149 bool isSugared() const { return true; } 3150 3151 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3152}; 3153 3154/// DecltypeType (C++0x) 3155class DecltypeType : public Type { 3156 Expr *E; 3157 QualType UnderlyingType; 3158 3159protected: 3160 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3161 friend class ASTContext; // ASTContext creates these. 3162public: 3163 Expr *getUnderlyingExpr() const { return E; } 3164 QualType getUnderlyingType() const { return UnderlyingType; } 3165 3166 /// \brief Remove a single level of sugar. 3167 QualType desugar() const; 3168 3169 /// \brief Returns whether this type directly provides sugar. 3170 bool isSugared() const; 3171 3172 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3173}; 3174 3175/// \brief Internal representation of canonical, dependent 3176/// decltype(expr) types. 3177/// 3178/// This class is used internally by the ASTContext to manage 3179/// canonical, dependent types, only. Clients will only see instances 3180/// of this class via DecltypeType nodes. 3181class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3182 const ASTContext &Context; 3183 3184public: 3185 DependentDecltypeType(const ASTContext &Context, Expr *E); 3186 3187 void Profile(llvm::FoldingSetNodeID &ID) { 3188 Profile(ID, Context, getUnderlyingExpr()); 3189 } 3190 3191 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3192 Expr *E); 3193}; 3194 3195/// \brief A unary type transform, which is a type constructed from another 3196class UnaryTransformType : public Type { 3197public: 3198 enum UTTKind { 3199 EnumUnderlyingType 3200 }; 3201 3202private: 3203 /// The untransformed type. 3204 QualType BaseType; 3205 /// The transformed type if not dependent, otherwise the same as BaseType. 3206 QualType UnderlyingType; 3207 3208 UTTKind UKind; 3209protected: 3210 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3211 QualType CanonicalTy); 3212 friend class ASTContext; 3213public: 3214 bool isSugared() const { return !isDependentType(); } 3215 QualType desugar() const { return UnderlyingType; } 3216 3217 QualType getUnderlyingType() const { return UnderlyingType; } 3218 QualType getBaseType() const { return BaseType; } 3219 3220 UTTKind getUTTKind() const { return UKind; } 3221 3222 static bool classof(const Type *T) { 3223 return T->getTypeClass() == UnaryTransform; 3224 } 3225}; 3226 3227class TagType : public Type { 3228 /// Stores the TagDecl associated with this type. The decl may point to any 3229 /// TagDecl that declares the entity. 3230 TagDecl * decl; 3231 3232 friend class ASTReader; 3233 3234protected: 3235 TagType(TypeClass TC, const TagDecl *D, QualType can); 3236 3237public: 3238 TagDecl *getDecl() const; 3239 3240 /// @brief Determines whether this type is in the process of being 3241 /// defined. 3242 bool isBeingDefined() const; 3243 3244 static bool classof(const Type *T) { 3245 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3246 } 3247}; 3248 3249/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3250/// to detect TagType objects of structs/unions/classes. 3251class RecordType : public TagType { 3252protected: 3253 explicit RecordType(const RecordDecl *D) 3254 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3255 explicit RecordType(TypeClass TC, RecordDecl *D) 3256 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3257 friend class ASTContext; // ASTContext creates these. 3258public: 3259 3260 RecordDecl *getDecl() const { 3261 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3262 } 3263 3264 // FIXME: This predicate is a helper to QualType/Type. It needs to 3265 // recursively check all fields for const-ness. If any field is declared 3266 // const, it needs to return false. 3267 bool hasConstFields() const { return false; } 3268 3269 bool isSugared() const { return false; } 3270 QualType desugar() const { return QualType(this, 0); } 3271 3272 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3273}; 3274 3275/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3276/// to detect TagType objects of enums. 3277class EnumType : public TagType { 3278 explicit EnumType(const EnumDecl *D) 3279 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3280 friend class ASTContext; // ASTContext creates these. 3281public: 3282 3283 EnumDecl *getDecl() const { 3284 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3285 } 3286 3287 bool isSugared() const { return false; } 3288 QualType desugar() const { return QualType(this, 0); } 3289 3290 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3291}; 3292 3293/// AttributedType - An attributed type is a type to which a type 3294/// attribute has been applied. The "modified type" is the 3295/// fully-sugared type to which the attributed type was applied; 3296/// generally it is not canonically equivalent to the attributed type. 3297/// The "equivalent type" is the minimally-desugared type which the 3298/// type is canonically equivalent to. 3299/// 3300/// For example, in the following attributed type: 3301/// int32_t __attribute__((vector_size(16))) 3302/// - the modified type is the TypedefType for int32_t 3303/// - the equivalent type is VectorType(16, int32_t) 3304/// - the canonical type is VectorType(16, int) 3305class AttributedType : public Type, public llvm::FoldingSetNode { 3306public: 3307 // It is really silly to have yet another attribute-kind enum, but 3308 // clang::attr::Kind doesn't currently cover the pure type attrs. 3309 enum Kind { 3310 // Expression operand. 3311 attr_address_space, 3312 attr_regparm, 3313 attr_vector_size, 3314 attr_neon_vector_type, 3315 attr_neon_polyvector_type, 3316 3317 FirstExprOperandKind = attr_address_space, 3318 LastExprOperandKind = attr_neon_polyvector_type, 3319 3320 // Enumerated operand (string or keyword). 3321 attr_objc_gc, 3322 attr_objc_ownership, 3323 attr_pcs, 3324 3325 FirstEnumOperandKind = attr_objc_gc, 3326 LastEnumOperandKind = attr_pcs, 3327 3328 // No operand. 3329 attr_noreturn, 3330 attr_cdecl, 3331 attr_fastcall, 3332 attr_stdcall, 3333 attr_thiscall, 3334 attr_pascal, 3335 attr_pnaclcall, 3336 attr_inteloclbicc 3337 }; 3338 3339private: 3340 QualType ModifiedType; 3341 QualType EquivalentType; 3342 3343 friend class ASTContext; // creates these 3344 3345 AttributedType(QualType canon, Kind attrKind, 3346 QualType modified, QualType equivalent) 3347 : Type(Attributed, canon, canon->isDependentType(), 3348 canon->isInstantiationDependentType(), 3349 canon->isVariablyModifiedType(), 3350 canon->containsUnexpandedParameterPack()), 3351 ModifiedType(modified), EquivalentType(equivalent) { 3352 AttributedTypeBits.AttrKind = attrKind; 3353 } 3354 3355public: 3356 Kind getAttrKind() const { 3357 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3358 } 3359 3360 QualType getModifiedType() const { return ModifiedType; } 3361 QualType getEquivalentType() const { return EquivalentType; } 3362 3363 bool isSugared() const { return true; } 3364 QualType desugar() const { return getEquivalentType(); } 3365 3366 void Profile(llvm::FoldingSetNodeID &ID) { 3367 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3368 } 3369 3370 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3371 QualType modified, QualType equivalent) { 3372 ID.AddInteger(attrKind); 3373 ID.AddPointer(modified.getAsOpaquePtr()); 3374 ID.AddPointer(equivalent.getAsOpaquePtr()); 3375 } 3376 3377 static bool classof(const Type *T) { 3378 return T->getTypeClass() == Attributed; 3379 } 3380}; 3381 3382class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3383 // Helper data collector for canonical types. 3384 struct CanonicalTTPTInfo { 3385 unsigned Depth : 15; 3386 unsigned ParameterPack : 1; 3387 unsigned Index : 16; 3388 }; 3389 3390 union { 3391 // Info for the canonical type. 3392 CanonicalTTPTInfo CanTTPTInfo; 3393 // Info for the non-canonical type. 3394 TemplateTypeParmDecl *TTPDecl; 3395 }; 3396 3397 /// Build a non-canonical type. 3398 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3399 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3400 /*InstantiationDependent=*/true, 3401 /*VariablyModified=*/false, 3402 Canon->containsUnexpandedParameterPack()), 3403 TTPDecl(TTPDecl) { } 3404 3405 /// Build the canonical type. 3406 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3407 : Type(TemplateTypeParm, QualType(this, 0), 3408 /*Dependent=*/true, 3409 /*InstantiationDependent=*/true, 3410 /*VariablyModified=*/false, PP) { 3411 CanTTPTInfo.Depth = D; 3412 CanTTPTInfo.Index = I; 3413 CanTTPTInfo.ParameterPack = PP; 3414 } 3415 3416 friend class ASTContext; // ASTContext creates these 3417 3418 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3419 QualType Can = getCanonicalTypeInternal(); 3420 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3421 } 3422 3423public: 3424 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3425 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3426 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3427 3428 TemplateTypeParmDecl *getDecl() const { 3429 return isCanonicalUnqualified() ? 0 : TTPDecl; 3430 } 3431 3432 IdentifierInfo *getIdentifier() const; 3433 3434 bool isSugared() const { return false; } 3435 QualType desugar() const { return QualType(this, 0); } 3436 3437 void Profile(llvm::FoldingSetNodeID &ID) { 3438 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3439 } 3440 3441 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3442 unsigned Index, bool ParameterPack, 3443 TemplateTypeParmDecl *TTPDecl) { 3444 ID.AddInteger(Depth); 3445 ID.AddInteger(Index); 3446 ID.AddBoolean(ParameterPack); 3447 ID.AddPointer(TTPDecl); 3448 } 3449 3450 static bool classof(const Type *T) { 3451 return T->getTypeClass() == TemplateTypeParm; 3452 } 3453}; 3454 3455/// \brief Represents the result of substituting a type for a template 3456/// type parameter. 3457/// 3458/// Within an instantiated template, all template type parameters have 3459/// been replaced with these. They are used solely to record that a 3460/// type was originally written as a template type parameter; 3461/// therefore they are never canonical. 3462class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3463 // The original type parameter. 3464 const TemplateTypeParmType *Replaced; 3465 3466 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3467 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3468 Canon->isInstantiationDependentType(), 3469 Canon->isVariablyModifiedType(), 3470 Canon->containsUnexpandedParameterPack()), 3471 Replaced(Param) { } 3472 3473 friend class ASTContext; 3474 3475public: 3476 /// Gets the template parameter that was substituted for. 3477 const TemplateTypeParmType *getReplacedParameter() const { 3478 return Replaced; 3479 } 3480 3481 /// Gets the type that was substituted for the template 3482 /// parameter. 3483 QualType getReplacementType() const { 3484 return getCanonicalTypeInternal(); 3485 } 3486 3487 bool isSugared() const { return true; } 3488 QualType desugar() const { return getReplacementType(); } 3489 3490 void Profile(llvm::FoldingSetNodeID &ID) { 3491 Profile(ID, getReplacedParameter(), getReplacementType()); 3492 } 3493 static void Profile(llvm::FoldingSetNodeID &ID, 3494 const TemplateTypeParmType *Replaced, 3495 QualType Replacement) { 3496 ID.AddPointer(Replaced); 3497 ID.AddPointer(Replacement.getAsOpaquePtr()); 3498 } 3499 3500 static bool classof(const Type *T) { 3501 return T->getTypeClass() == SubstTemplateTypeParm; 3502 } 3503}; 3504 3505/// \brief Represents the result of substituting a set of types for a template 3506/// type parameter pack. 3507/// 3508/// When a pack expansion in the source code contains multiple parameter packs 3509/// and those parameter packs correspond to different levels of template 3510/// parameter lists, this type node is used to represent a template type 3511/// parameter pack from an outer level, which has already had its argument pack 3512/// substituted but that still lives within a pack expansion that itself 3513/// could not be instantiated. When actually performing a substitution into 3514/// that pack expansion (e.g., when all template parameters have corresponding 3515/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3516/// at the current pack substitution index. 3517class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3518 /// \brief The original type parameter. 3519 const TemplateTypeParmType *Replaced; 3520 3521 /// \brief A pointer to the set of template arguments that this 3522 /// parameter pack is instantiated with. 3523 const TemplateArgument *Arguments; 3524 3525 /// \brief The number of template arguments in \c Arguments. 3526 unsigned NumArguments; 3527 3528 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3529 QualType Canon, 3530 const TemplateArgument &ArgPack); 3531 3532 friend class ASTContext; 3533 3534public: 3535 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3536 3537 /// Gets the template parameter that was substituted for. 3538 const TemplateTypeParmType *getReplacedParameter() const { 3539 return Replaced; 3540 } 3541 3542 bool isSugared() const { return false; } 3543 QualType desugar() const { return QualType(this, 0); } 3544 3545 TemplateArgument getArgumentPack() const; 3546 3547 void Profile(llvm::FoldingSetNodeID &ID); 3548 static void Profile(llvm::FoldingSetNodeID &ID, 3549 const TemplateTypeParmType *Replaced, 3550 const TemplateArgument &ArgPack); 3551 3552 static bool classof(const Type *T) { 3553 return T->getTypeClass() == SubstTemplateTypeParmPack; 3554 } 3555}; 3556 3557/// \brief Represents a C++0x auto type. 3558/// 3559/// These types are usually a placeholder for a deduced type. However, within 3560/// templates and before the initializer is attached, there is no deduced type 3561/// and an auto type is type-dependent and canonical. 3562class AutoType : public Type, public llvm::FoldingSetNode { 3563 AutoType(QualType DeducedType) 3564 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3565 /*Dependent=*/DeducedType.isNull(), 3566 /*InstantiationDependent=*/DeducedType.isNull(), 3567 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3568 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3569 "deduced a dependent type for auto"); 3570 } 3571 3572 friend class ASTContext; // ASTContext creates these 3573 3574public: 3575 bool isSugared() const { return isDeduced(); } 3576 QualType desugar() const { return getCanonicalTypeInternal(); } 3577 3578 QualType getDeducedType() const { 3579 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3580 } 3581 bool isDeduced() const { 3582 return !isDependentType(); 3583 } 3584 3585 void Profile(llvm::FoldingSetNodeID &ID) { 3586 Profile(ID, getDeducedType()); 3587 } 3588 3589 static void Profile(llvm::FoldingSetNodeID &ID, 3590 QualType Deduced) { 3591 ID.AddPointer(Deduced.getAsOpaquePtr()); 3592 } 3593 3594 static bool classof(const Type *T) { 3595 return T->getTypeClass() == Auto; 3596 } 3597}; 3598 3599/// \brief Represents a type template specialization; the template 3600/// must be a class template, a type alias template, or a template 3601/// template parameter. A template which cannot be resolved to one of 3602/// these, e.g. because it is written with a dependent scope 3603/// specifier, is instead represented as a 3604/// @c DependentTemplateSpecializationType. 3605/// 3606/// A non-dependent template specialization type is always "sugar", 3607/// typically for a @c RecordType. For example, a class template 3608/// specialization type of @c vector<int> will refer to a tag type for 3609/// the instantiation @c std::vector<int, std::allocator<int>> 3610/// 3611/// Template specializations are dependent if either the template or 3612/// any of the template arguments are dependent, in which case the 3613/// type may also be canonical. 3614/// 3615/// Instances of this type are allocated with a trailing array of 3616/// TemplateArguments, followed by a QualType representing the 3617/// non-canonical aliased type when the template is a type alias 3618/// template. 3619class TemplateSpecializationType 3620 : public Type, public llvm::FoldingSetNode { 3621 /// \brief The name of the template being specialized. This is 3622 /// either a TemplateName::Template (in which case it is a 3623 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3624 /// TypeAliasTemplateDecl*), a 3625 /// TemplateName::SubstTemplateTemplateParmPack, or a 3626 /// TemplateName::SubstTemplateTemplateParm (in which case the 3627 /// replacement must, recursively, be one of these). 3628 TemplateName Template; 3629 3630 /// \brief - The number of template arguments named in this class 3631 /// template specialization. 3632 unsigned NumArgs : 31; 3633 3634 /// \brief Whether this template specialization type is a substituted 3635 /// type alias. 3636 bool TypeAlias : 1; 3637 3638 TemplateSpecializationType(TemplateName T, 3639 const TemplateArgument *Args, 3640 unsigned NumArgs, QualType Canon, 3641 QualType Aliased); 3642 3643 friend class ASTContext; // ASTContext creates these 3644 3645public: 3646 /// \brief Determine whether any of the given template arguments are 3647 /// dependent. 3648 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3649 unsigned NumArgs, 3650 bool &InstantiationDependent); 3651 3652 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3653 unsigned NumArgs, 3654 bool &InstantiationDependent); 3655 3656 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3657 bool &InstantiationDependent); 3658 3659 /// \brief Print a template argument list, including the '<' and '>' 3660 /// enclosing the template arguments. 3661 static void PrintTemplateArgumentList(raw_ostream &OS, 3662 const TemplateArgument *Args, 3663 unsigned NumArgs, 3664 const PrintingPolicy &Policy, 3665 bool SkipBrackets = false); 3666 3667 static void PrintTemplateArgumentList(raw_ostream &OS, 3668 const TemplateArgumentLoc *Args, 3669 unsigned NumArgs, 3670 const PrintingPolicy &Policy); 3671 3672 static void PrintTemplateArgumentList(raw_ostream &OS, 3673 const TemplateArgumentListInfo &, 3674 const PrintingPolicy &Policy); 3675 3676 /// True if this template specialization type matches a current 3677 /// instantiation in the context in which it is found. 3678 bool isCurrentInstantiation() const { 3679 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3680 } 3681 3682 /// \brief Determine if this template specialization type is for a type alias 3683 /// template that has been substituted. 3684 /// 3685 /// Nearly every template specialization type whose template is an alias 3686 /// template will be substituted. However, this is not the case when 3687 /// the specialization contains a pack expansion but the template alias 3688 /// does not have a corresponding parameter pack, e.g., 3689 /// 3690 /// \code 3691 /// template<typename T, typename U, typename V> struct S; 3692 /// template<typename T, typename U> using A = S<T, int, U>; 3693 /// template<typename... Ts> struct X { 3694 /// typedef A<Ts...> type; // not a type alias 3695 /// }; 3696 /// \endcode 3697 bool isTypeAlias() const { return TypeAlias; } 3698 3699 /// Get the aliased type, if this is a specialization of a type alias 3700 /// template. 3701 QualType getAliasedType() const { 3702 assert(isTypeAlias() && "not a type alias template specialization"); 3703 return *reinterpret_cast<const QualType*>(end()); 3704 } 3705 3706 typedef const TemplateArgument * iterator; 3707 3708 iterator begin() const { return getArgs(); } 3709 iterator end() const; // defined inline in TemplateBase.h 3710 3711 /// \brief Retrieve the name of the template that we are specializing. 3712 TemplateName getTemplateName() const { return Template; } 3713 3714 /// \brief Retrieve the template arguments. 3715 const TemplateArgument *getArgs() const { 3716 return reinterpret_cast<const TemplateArgument *>(this + 1); 3717 } 3718 3719 /// \brief Retrieve the number of template arguments. 3720 unsigned getNumArgs() const { return NumArgs; } 3721 3722 /// \brief Retrieve a specific template argument as a type. 3723 /// \pre @c isArgType(Arg) 3724 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3725 3726 bool isSugared() const { 3727 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3728 } 3729 QualType desugar() const { return getCanonicalTypeInternal(); } 3730 3731 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3732 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3733 if (isTypeAlias()) 3734 getAliasedType().Profile(ID); 3735 } 3736 3737 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3738 const TemplateArgument *Args, 3739 unsigned NumArgs, 3740 const ASTContext &Context); 3741 3742 static bool classof(const Type *T) { 3743 return T->getTypeClass() == TemplateSpecialization; 3744 } 3745}; 3746 3747/// \brief The injected class name of a C++ class template or class 3748/// template partial specialization. Used to record that a type was 3749/// spelled with a bare identifier rather than as a template-id; the 3750/// equivalent for non-templated classes is just RecordType. 3751/// 3752/// Injected class name types are always dependent. Template 3753/// instantiation turns these into RecordTypes. 3754/// 3755/// Injected class name types are always canonical. This works 3756/// because it is impossible to compare an injected class name type 3757/// with the corresponding non-injected template type, for the same 3758/// reason that it is impossible to directly compare template 3759/// parameters from different dependent contexts: injected class name 3760/// types can only occur within the scope of a particular templated 3761/// declaration, and within that scope every template specialization 3762/// will canonicalize to the injected class name (when appropriate 3763/// according to the rules of the language). 3764class InjectedClassNameType : public Type { 3765 CXXRecordDecl *Decl; 3766 3767 /// The template specialization which this type represents. 3768 /// For example, in 3769 /// template <class T> class A { ... }; 3770 /// this is A<T>, whereas in 3771 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3772 /// this is A<B<X,Y> >. 3773 /// 3774 /// It is always unqualified, always a template specialization type, 3775 /// and always dependent. 3776 QualType InjectedType; 3777 3778 friend class ASTContext; // ASTContext creates these. 3779 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3780 // currently suitable for AST reading, too much 3781 // interdependencies. 3782 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3783 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3784 /*InstantiationDependent=*/true, 3785 /*VariablyModified=*/false, 3786 /*ContainsUnexpandedParameterPack=*/false), 3787 Decl(D), InjectedType(TST) { 3788 assert(isa<TemplateSpecializationType>(TST)); 3789 assert(!TST.hasQualifiers()); 3790 assert(TST->isDependentType()); 3791 } 3792 3793public: 3794 QualType getInjectedSpecializationType() const { return InjectedType; } 3795 const TemplateSpecializationType *getInjectedTST() const { 3796 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3797 } 3798 3799 CXXRecordDecl *getDecl() const; 3800 3801 bool isSugared() const { return false; } 3802 QualType desugar() const { return QualType(this, 0); } 3803 3804 static bool classof(const Type *T) { 3805 return T->getTypeClass() == InjectedClassName; 3806 } 3807}; 3808 3809/// \brief The kind of a tag type. 3810enum TagTypeKind { 3811 /// \brief The "struct" keyword. 3812 TTK_Struct, 3813 /// \brief The "__interface" keyword. 3814 TTK_Interface, 3815 /// \brief The "union" keyword. 3816 TTK_Union, 3817 /// \brief The "class" keyword. 3818 TTK_Class, 3819 /// \brief The "enum" keyword. 3820 TTK_Enum 3821}; 3822 3823/// \brief The elaboration keyword that precedes a qualified type name or 3824/// introduces an elaborated-type-specifier. 3825enum ElaboratedTypeKeyword { 3826 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3827 ETK_Struct, 3828 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3829 ETK_Interface, 3830 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3831 ETK_Union, 3832 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3833 ETK_Class, 3834 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3835 ETK_Enum, 3836 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3837 /// \c typename T::type. 3838 ETK_Typename, 3839 /// \brief No keyword precedes the qualified type name. 3840 ETK_None 3841}; 3842 3843/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3844/// The keyword in stored in the free bits of the base class. 3845/// Also provides a few static helpers for converting and printing 3846/// elaborated type keyword and tag type kind enumerations. 3847class TypeWithKeyword : public Type { 3848protected: 3849 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3850 QualType Canonical, bool Dependent, 3851 bool InstantiationDependent, bool VariablyModified, 3852 bool ContainsUnexpandedParameterPack) 3853 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3854 ContainsUnexpandedParameterPack) { 3855 TypeWithKeywordBits.Keyword = Keyword; 3856 } 3857 3858public: 3859 ElaboratedTypeKeyword getKeyword() const { 3860 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3861 } 3862 3863 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3864 /// into an elaborated type keyword. 3865 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3866 3867 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3868 /// into a tag type kind. It is an error to provide a type specifier 3869 /// which *isn't* a tag kind here. 3870 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3871 3872 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3873 /// elaborated type keyword. 3874 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3875 3876 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3877 // a TagTypeKind. It is an error to provide an elaborated type keyword 3878 /// which *isn't* a tag kind here. 3879 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3880 3881 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3882 3883 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3884 3885 static const char *getTagTypeKindName(TagTypeKind Kind) { 3886 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3887 } 3888 3889 class CannotCastToThisType {}; 3890 static CannotCastToThisType classof(const Type *); 3891}; 3892 3893/// \brief Represents a type that was referred to using an elaborated type 3894/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3895/// or both. 3896/// 3897/// This type is used to keep track of a type name as written in the 3898/// source code, including tag keywords and any nested-name-specifiers. 3899/// The type itself is always "sugar", used to express what was written 3900/// in the source code but containing no additional semantic information. 3901class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3902 3903 /// \brief The nested name specifier containing the qualifier. 3904 NestedNameSpecifier *NNS; 3905 3906 /// \brief The type that this qualified name refers to. 3907 QualType NamedType; 3908 3909 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3910 QualType NamedType, QualType CanonType) 3911 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3912 NamedType->isDependentType(), 3913 NamedType->isInstantiationDependentType(), 3914 NamedType->isVariablyModifiedType(), 3915 NamedType->containsUnexpandedParameterPack()), 3916 NNS(NNS), NamedType(NamedType) { 3917 assert(!(Keyword == ETK_None && NNS == 0) && 3918 "ElaboratedType cannot have elaborated type keyword " 3919 "and name qualifier both null."); 3920 } 3921 3922 friend class ASTContext; // ASTContext creates these 3923 3924public: 3925 ~ElaboratedType(); 3926 3927 /// \brief Retrieve the qualification on this type. 3928 NestedNameSpecifier *getQualifier() const { return NNS; } 3929 3930 /// \brief Retrieve the type named by the qualified-id. 3931 QualType getNamedType() const { return NamedType; } 3932 3933 /// \brief Remove a single level of sugar. 3934 QualType desugar() const { return getNamedType(); } 3935 3936 /// \brief Returns whether this type directly provides sugar. 3937 bool isSugared() const { return true; } 3938 3939 void Profile(llvm::FoldingSetNodeID &ID) { 3940 Profile(ID, getKeyword(), NNS, NamedType); 3941 } 3942 3943 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3944 NestedNameSpecifier *NNS, QualType NamedType) { 3945 ID.AddInteger(Keyword); 3946 ID.AddPointer(NNS); 3947 NamedType.Profile(ID); 3948 } 3949 3950 static bool classof(const Type *T) { 3951 return T->getTypeClass() == Elaborated; 3952 } 3953}; 3954 3955/// \brief Represents a qualified type name for which the type name is 3956/// dependent. 3957/// 3958/// DependentNameType represents a class of dependent types that involve a 3959/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3960/// name of a type. The DependentNameType may start with a "typename" (for a 3961/// typename-specifier), "class", "struct", "union", or "enum" (for a 3962/// dependent elaborated-type-specifier), or nothing (in contexts where we 3963/// know that we must be referring to a type, e.g., in a base class specifier). 3964class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3965 3966 /// \brief The nested name specifier containing the qualifier. 3967 NestedNameSpecifier *NNS; 3968 3969 /// \brief The type that this typename specifier refers to. 3970 const IdentifierInfo *Name; 3971 3972 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3973 const IdentifierInfo *Name, QualType CanonType) 3974 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3975 /*InstantiationDependent=*/true, 3976 /*VariablyModified=*/false, 3977 NNS->containsUnexpandedParameterPack()), 3978 NNS(NNS), Name(Name) { 3979 assert(NNS->isDependent() && 3980 "DependentNameType requires a dependent nested-name-specifier"); 3981 } 3982 3983 friend class ASTContext; // ASTContext creates these 3984 3985public: 3986 /// \brief Retrieve the qualification on this type. 3987 NestedNameSpecifier *getQualifier() const { return NNS; } 3988 3989 /// \brief Retrieve the type named by the typename specifier as an 3990 /// identifier. 3991 /// 3992 /// This routine will return a non-NULL identifier pointer when the 3993 /// form of the original typename was terminated by an identifier, 3994 /// e.g., "typename T::type". 3995 const IdentifierInfo *getIdentifier() const { 3996 return Name; 3997 } 3998 3999 bool isSugared() const { return false; } 4000 QualType desugar() const { return QualType(this, 0); } 4001 4002 void Profile(llvm::FoldingSetNodeID &ID) { 4003 Profile(ID, getKeyword(), NNS, Name); 4004 } 4005 4006 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4007 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4008 ID.AddInteger(Keyword); 4009 ID.AddPointer(NNS); 4010 ID.AddPointer(Name); 4011 } 4012 4013 static bool classof(const Type *T) { 4014 return T->getTypeClass() == DependentName; 4015 } 4016}; 4017 4018/// DependentTemplateSpecializationType - Represents a template 4019/// specialization type whose template cannot be resolved, e.g. 4020/// A<T>::template B<T> 4021class DependentTemplateSpecializationType : 4022 public TypeWithKeyword, public llvm::FoldingSetNode { 4023 4024 /// \brief The nested name specifier containing the qualifier. 4025 NestedNameSpecifier *NNS; 4026 4027 /// \brief The identifier of the template. 4028 const IdentifierInfo *Name; 4029 4030 /// \brief - The number of template arguments named in this class 4031 /// template specialization. 4032 unsigned NumArgs; 4033 4034 const TemplateArgument *getArgBuffer() const { 4035 return reinterpret_cast<const TemplateArgument*>(this+1); 4036 } 4037 TemplateArgument *getArgBuffer() { 4038 return reinterpret_cast<TemplateArgument*>(this+1); 4039 } 4040 4041 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4042 NestedNameSpecifier *NNS, 4043 const IdentifierInfo *Name, 4044 unsigned NumArgs, 4045 const TemplateArgument *Args, 4046 QualType Canon); 4047 4048 friend class ASTContext; // ASTContext creates these 4049 4050public: 4051 NestedNameSpecifier *getQualifier() const { return NNS; } 4052 const IdentifierInfo *getIdentifier() const { return Name; } 4053 4054 /// \brief Retrieve the template arguments. 4055 const TemplateArgument *getArgs() const { 4056 return getArgBuffer(); 4057 } 4058 4059 /// \brief Retrieve the number of template arguments. 4060 unsigned getNumArgs() const { return NumArgs; } 4061 4062 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4063 4064 typedef const TemplateArgument * iterator; 4065 iterator begin() const { return getArgs(); } 4066 iterator end() const; // inline in TemplateBase.h 4067 4068 bool isSugared() const { return false; } 4069 QualType desugar() const { return QualType(this, 0); } 4070 4071 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4072 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4073 } 4074 4075 static void Profile(llvm::FoldingSetNodeID &ID, 4076 const ASTContext &Context, 4077 ElaboratedTypeKeyword Keyword, 4078 NestedNameSpecifier *Qualifier, 4079 const IdentifierInfo *Name, 4080 unsigned NumArgs, 4081 const TemplateArgument *Args); 4082 4083 static bool classof(const Type *T) { 4084 return T->getTypeClass() == DependentTemplateSpecialization; 4085 } 4086}; 4087 4088/// \brief Represents a pack expansion of types. 4089/// 4090/// Pack expansions are part of C++0x variadic templates. A pack 4091/// expansion contains a pattern, which itself contains one or more 4092/// "unexpanded" parameter packs. When instantiated, a pack expansion 4093/// produces a series of types, each instantiated from the pattern of 4094/// the expansion, where the Ith instantiation of the pattern uses the 4095/// Ith arguments bound to each of the unexpanded parameter packs. The 4096/// pack expansion is considered to "expand" these unexpanded 4097/// parameter packs. 4098/// 4099/// \code 4100/// template<typename ...Types> struct tuple; 4101/// 4102/// template<typename ...Types> 4103/// struct tuple_of_references { 4104/// typedef tuple<Types&...> type; 4105/// }; 4106/// \endcode 4107/// 4108/// Here, the pack expansion \c Types&... is represented via a 4109/// PackExpansionType whose pattern is Types&. 4110class PackExpansionType : public Type, public llvm::FoldingSetNode { 4111 /// \brief The pattern of the pack expansion. 4112 QualType Pattern; 4113 4114 /// \brief The number of expansions that this pack expansion will 4115 /// generate when substituted (+1), or indicates that 4116 /// 4117 /// This field will only have a non-zero value when some of the parameter 4118 /// packs that occur within the pattern have been substituted but others have 4119 /// not. 4120 unsigned NumExpansions; 4121 4122 PackExpansionType(QualType Pattern, QualType Canon, 4123 Optional<unsigned> NumExpansions) 4124 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4125 /*InstantiationDependent=*/true, 4126 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4127 /*ContainsUnexpandedParameterPack=*/false), 4128 Pattern(Pattern), 4129 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4130 4131 friend class ASTContext; // ASTContext creates these 4132 4133public: 4134 /// \brief Retrieve the pattern of this pack expansion, which is the 4135 /// type that will be repeatedly instantiated when instantiating the 4136 /// pack expansion itself. 4137 QualType getPattern() const { return Pattern; } 4138 4139 /// \brief Retrieve the number of expansions that this pack expansion will 4140 /// generate, if known. 4141 Optional<unsigned> getNumExpansions() const { 4142 if (NumExpansions) 4143 return NumExpansions - 1; 4144 4145 return None; 4146 } 4147 4148 bool isSugared() const { return false; } 4149 QualType desugar() const { return QualType(this, 0); } 4150 4151 void Profile(llvm::FoldingSetNodeID &ID) { 4152 Profile(ID, getPattern(), getNumExpansions()); 4153 } 4154 4155 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4156 Optional<unsigned> NumExpansions) { 4157 ID.AddPointer(Pattern.getAsOpaquePtr()); 4158 ID.AddBoolean(NumExpansions.hasValue()); 4159 if (NumExpansions) 4160 ID.AddInteger(*NumExpansions); 4161 } 4162 4163 static bool classof(const Type *T) { 4164 return T->getTypeClass() == PackExpansion; 4165 } 4166}; 4167 4168/// ObjCObjectType - Represents a class type in Objective C. 4169/// Every Objective C type is a combination of a base type and a 4170/// list of protocols. 4171/// 4172/// Given the following declarations: 4173/// \code 4174/// \@class C; 4175/// \@protocol P; 4176/// \endcode 4177/// 4178/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4179/// with base C and no protocols. 4180/// 4181/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4182/// 4183/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4184/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4185/// and no protocols. 4186/// 4187/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4188/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4189/// this should get its own sugar class to better represent the source. 4190class ObjCObjectType : public Type { 4191 // ObjCObjectType.NumProtocols - the number of protocols stored 4192 // after the ObjCObjectPointerType node. 4193 // 4194 // These protocols are those written directly on the type. If 4195 // protocol qualifiers ever become additive, the iterators will need 4196 // to get kindof complicated. 4197 // 4198 // In the canonical object type, these are sorted alphabetically 4199 // and uniqued. 4200 4201 /// Either a BuiltinType or an InterfaceType or sugar for either. 4202 QualType BaseType; 4203 4204 ObjCProtocolDecl * const *getProtocolStorage() const { 4205 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4206 } 4207 4208 ObjCProtocolDecl **getProtocolStorage(); 4209 4210protected: 4211 ObjCObjectType(QualType Canonical, QualType Base, 4212 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4213 4214 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4215 ObjCObjectType(enum Nonce_ObjCInterface) 4216 : Type(ObjCInterface, QualType(), false, false, false, false), 4217 BaseType(QualType(this_(), 0)) { 4218 ObjCObjectTypeBits.NumProtocols = 0; 4219 } 4220 4221public: 4222 /// getBaseType - Gets the base type of this object type. This is 4223 /// always (possibly sugar for) one of: 4224 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4225 /// user, which is a typedef for an ObjCPointerType) 4226 /// - the 'Class' builtin type (same caveat) 4227 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4228 QualType getBaseType() const { return BaseType; } 4229 4230 bool isObjCId() const { 4231 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4232 } 4233 bool isObjCClass() const { 4234 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4235 } 4236 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4237 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4238 bool isObjCUnqualifiedIdOrClass() const { 4239 if (!qual_empty()) return false; 4240 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4241 return T->getKind() == BuiltinType::ObjCId || 4242 T->getKind() == BuiltinType::ObjCClass; 4243 return false; 4244 } 4245 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4246 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4247 4248 /// Gets the interface declaration for this object type, if the base type 4249 /// really is an interface. 4250 ObjCInterfaceDecl *getInterface() const; 4251 4252 typedef ObjCProtocolDecl * const *qual_iterator; 4253 4254 qual_iterator qual_begin() const { return getProtocolStorage(); } 4255 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4256 4257 bool qual_empty() const { return getNumProtocols() == 0; } 4258 4259 /// getNumProtocols - Return the number of qualifying protocols in this 4260 /// interface type, or 0 if there are none. 4261 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4262 4263 /// \brief Fetch a protocol by index. 4264 ObjCProtocolDecl *getProtocol(unsigned I) const { 4265 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4266 return qual_begin()[I]; 4267 } 4268 4269 bool isSugared() const { return false; } 4270 QualType desugar() const { return QualType(this, 0); } 4271 4272 static bool classof(const Type *T) { 4273 return T->getTypeClass() == ObjCObject || 4274 T->getTypeClass() == ObjCInterface; 4275 } 4276}; 4277 4278/// ObjCObjectTypeImpl - A class providing a concrete implementation 4279/// of ObjCObjectType, so as to not increase the footprint of 4280/// ObjCInterfaceType. Code outside of ASTContext and the core type 4281/// system should not reference this type. 4282class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4283 friend class ASTContext; 4284 4285 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4286 // will need to be modified. 4287 4288 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4289 ObjCProtocolDecl * const *Protocols, 4290 unsigned NumProtocols) 4291 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4292 4293public: 4294 void Profile(llvm::FoldingSetNodeID &ID); 4295 static void Profile(llvm::FoldingSetNodeID &ID, 4296 QualType Base, 4297 ObjCProtocolDecl *const *protocols, 4298 unsigned NumProtocols); 4299}; 4300 4301inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4302 return reinterpret_cast<ObjCProtocolDecl**>( 4303 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4304} 4305 4306/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4307/// object oriented design. They basically correspond to C++ classes. There 4308/// are two kinds of interface types, normal interfaces like "NSString" and 4309/// qualified interfaces, which are qualified with a protocol list like 4310/// "NSString<NSCopyable, NSAmazing>". 4311/// 4312/// ObjCInterfaceType guarantees the following properties when considered 4313/// as a subtype of its superclass, ObjCObjectType: 4314/// - There are no protocol qualifiers. To reinforce this, code which 4315/// tries to invoke the protocol methods via an ObjCInterfaceType will 4316/// fail to compile. 4317/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4318/// T->getBaseType() == QualType(T, 0). 4319class ObjCInterfaceType : public ObjCObjectType { 4320 mutable ObjCInterfaceDecl *Decl; 4321 4322 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4323 : ObjCObjectType(Nonce_ObjCInterface), 4324 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4325 friend class ASTContext; // ASTContext creates these. 4326 friend class ASTReader; 4327 friend class ObjCInterfaceDecl; 4328 4329public: 4330 /// getDecl - Get the declaration of this interface. 4331 ObjCInterfaceDecl *getDecl() const { return Decl; } 4332 4333 bool isSugared() const { return false; } 4334 QualType desugar() const { return QualType(this, 0); } 4335 4336 static bool classof(const Type *T) { 4337 return T->getTypeClass() == ObjCInterface; 4338 } 4339 4340 // Nonsense to "hide" certain members of ObjCObjectType within this 4341 // class. People asking for protocols on an ObjCInterfaceType are 4342 // not going to get what they want: ObjCInterfaceTypes are 4343 // guaranteed to have no protocols. 4344 enum { 4345 qual_iterator, 4346 qual_begin, 4347 qual_end, 4348 getNumProtocols, 4349 getProtocol 4350 }; 4351}; 4352 4353inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4354 if (const ObjCInterfaceType *T = 4355 getBaseType()->getAs<ObjCInterfaceType>()) 4356 return T->getDecl(); 4357 return 0; 4358} 4359 4360/// ObjCObjectPointerType - Used to represent a pointer to an 4361/// Objective C object. These are constructed from pointer 4362/// declarators when the pointee type is an ObjCObjectType (or sugar 4363/// for one). In addition, the 'id' and 'Class' types are typedefs 4364/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4365/// are translated into these. 4366/// 4367/// Pointers to pointers to Objective C objects are still PointerTypes; 4368/// only the first level of pointer gets it own type implementation. 4369class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4370 QualType PointeeType; 4371 4372 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4373 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4374 PointeeType(Pointee) {} 4375 friend class ASTContext; // ASTContext creates these. 4376 4377public: 4378 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4379 /// The result will always be an ObjCObjectType or sugar thereof. 4380 QualType getPointeeType() const { return PointeeType; } 4381 4382 /// getObjCObjectType - Gets the type pointed to by this ObjC 4383 /// pointer. This method always returns non-null. 4384 /// 4385 /// This method is equivalent to getPointeeType() except that 4386 /// it discards any typedefs (or other sugar) between this 4387 /// type and the "outermost" object type. So for: 4388 /// \code 4389 /// \@class A; \@protocol P; \@protocol Q; 4390 /// typedef A<P> AP; 4391 /// typedef A A1; 4392 /// typedef A1<P> A1P; 4393 /// typedef A1P<Q> A1PQ; 4394 /// \endcode 4395 /// For 'A*', getObjectType() will return 'A'. 4396 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4397 /// For 'AP*', getObjectType() will return 'A<P>'. 4398 /// For 'A1*', getObjectType() will return 'A'. 4399 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4400 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4401 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4402 /// adding protocols to a protocol-qualified base discards the 4403 /// old qualifiers (for now). But if it didn't, getObjectType() 4404 /// would return 'A1P<Q>' (and we'd have to make iterating over 4405 /// qualifiers more complicated). 4406 const ObjCObjectType *getObjectType() const { 4407 return PointeeType->castAs<ObjCObjectType>(); 4408 } 4409 4410 /// getInterfaceType - If this pointer points to an Objective C 4411 /// \@interface type, gets the type for that interface. Any protocol 4412 /// qualifiers on the interface are ignored. 4413 /// 4414 /// \return null if the base type for this pointer is 'id' or 'Class' 4415 const ObjCInterfaceType *getInterfaceType() const { 4416 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4417 } 4418 4419 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4420 /// type, gets the declaration for that interface. 4421 /// 4422 /// \return null if the base type for this pointer is 'id' or 'Class' 4423 ObjCInterfaceDecl *getInterfaceDecl() const { 4424 return getObjectType()->getInterface(); 4425 } 4426 4427 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4428 /// its object type is the primitive 'id' type with no protocols. 4429 bool isObjCIdType() const { 4430 return getObjectType()->isObjCUnqualifiedId(); 4431 } 4432 4433 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4434 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4435 bool isObjCClassType() const { 4436 return getObjectType()->isObjCUnqualifiedClass(); 4437 } 4438 4439 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4440 /// non-empty set of protocols. 4441 bool isObjCQualifiedIdType() const { 4442 return getObjectType()->isObjCQualifiedId(); 4443 } 4444 4445 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4446 /// some non-empty set of protocols. 4447 bool isObjCQualifiedClassType() const { 4448 return getObjectType()->isObjCQualifiedClass(); 4449 } 4450 4451 /// An iterator over the qualifiers on the object type. Provided 4452 /// for convenience. This will always iterate over the full set of 4453 /// protocols on a type, not just those provided directly. 4454 typedef ObjCObjectType::qual_iterator qual_iterator; 4455 4456 qual_iterator qual_begin() const { 4457 return getObjectType()->qual_begin(); 4458 } 4459 qual_iterator qual_end() const { 4460 return getObjectType()->qual_end(); 4461 } 4462 bool qual_empty() const { return getObjectType()->qual_empty(); } 4463 4464 /// getNumProtocols - Return the number of qualifying protocols on 4465 /// the object type. 4466 unsigned getNumProtocols() const { 4467 return getObjectType()->getNumProtocols(); 4468 } 4469 4470 /// \brief Retrieve a qualifying protocol by index on the object 4471 /// type. 4472 ObjCProtocolDecl *getProtocol(unsigned I) const { 4473 return getObjectType()->getProtocol(I); 4474 } 4475 4476 bool isSugared() const { return false; } 4477 QualType desugar() const { return QualType(this, 0); } 4478 4479 void Profile(llvm::FoldingSetNodeID &ID) { 4480 Profile(ID, getPointeeType()); 4481 } 4482 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4483 ID.AddPointer(T.getAsOpaquePtr()); 4484 } 4485 static bool classof(const Type *T) { 4486 return T->getTypeClass() == ObjCObjectPointer; 4487 } 4488}; 4489 4490class AtomicType : public Type, public llvm::FoldingSetNode { 4491 QualType ValueType; 4492 4493 AtomicType(QualType ValTy, QualType Canonical) 4494 : Type(Atomic, Canonical, ValTy->isDependentType(), 4495 ValTy->isInstantiationDependentType(), 4496 ValTy->isVariablyModifiedType(), 4497 ValTy->containsUnexpandedParameterPack()), 4498 ValueType(ValTy) {} 4499 friend class ASTContext; // ASTContext creates these. 4500 4501 public: 4502 /// getValueType - Gets the type contained by this atomic type, i.e. 4503 /// the type returned by performing an atomic load of this atomic type. 4504 QualType getValueType() const { return ValueType; } 4505 4506 bool isSugared() const { return false; } 4507 QualType desugar() const { return QualType(this, 0); } 4508 4509 void Profile(llvm::FoldingSetNodeID &ID) { 4510 Profile(ID, getValueType()); 4511 } 4512 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4513 ID.AddPointer(T.getAsOpaquePtr()); 4514 } 4515 static bool classof(const Type *T) { 4516 return T->getTypeClass() == Atomic; 4517 } 4518}; 4519 4520/// A qualifier set is used to build a set of qualifiers. 4521class QualifierCollector : public Qualifiers { 4522public: 4523 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4524 4525 /// Collect any qualifiers on the given type and return an 4526 /// unqualified type. The qualifiers are assumed to be consistent 4527 /// with those already in the type. 4528 const Type *strip(QualType type) { 4529 addFastQualifiers(type.getLocalFastQualifiers()); 4530 if (!type.hasLocalNonFastQualifiers()) 4531 return type.getTypePtrUnsafe(); 4532 4533 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4534 addConsistentQualifiers(extQuals->getQualifiers()); 4535 return extQuals->getBaseType(); 4536 } 4537 4538 /// Apply the collected qualifiers to the given type. 4539 QualType apply(const ASTContext &Context, QualType QT) const; 4540 4541 /// Apply the collected qualifiers to the given type. 4542 QualType apply(const ASTContext &Context, const Type* T) const; 4543}; 4544 4545 4546// Inline function definitions. 4547 4548inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4549 SplitQualType desugar = 4550 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4551 desugar.Quals.addConsistentQualifiers(Quals); 4552 return desugar; 4553} 4554 4555inline const Type *QualType::getTypePtr() const { 4556 return getCommonPtr()->BaseType; 4557} 4558 4559inline const Type *QualType::getTypePtrOrNull() const { 4560 return (isNull() ? 0 : getCommonPtr()->BaseType); 4561} 4562 4563inline SplitQualType QualType::split() const { 4564 if (!hasLocalNonFastQualifiers()) 4565 return SplitQualType(getTypePtrUnsafe(), 4566 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4567 4568 const ExtQuals *eq = getExtQualsUnsafe(); 4569 Qualifiers qs = eq->getQualifiers(); 4570 qs.addFastQualifiers(getLocalFastQualifiers()); 4571 return SplitQualType(eq->getBaseType(), qs); 4572} 4573 4574inline Qualifiers QualType::getLocalQualifiers() const { 4575 Qualifiers Quals; 4576 if (hasLocalNonFastQualifiers()) 4577 Quals = getExtQualsUnsafe()->getQualifiers(); 4578 Quals.addFastQualifiers(getLocalFastQualifiers()); 4579 return Quals; 4580} 4581 4582inline Qualifiers QualType::getQualifiers() const { 4583 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4584 quals.addFastQualifiers(getLocalFastQualifiers()); 4585 return quals; 4586} 4587 4588inline unsigned QualType::getCVRQualifiers() const { 4589 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4590 cvr |= getLocalCVRQualifiers(); 4591 return cvr; 4592} 4593 4594inline QualType QualType::getCanonicalType() const { 4595 QualType canon = getCommonPtr()->CanonicalType; 4596 return canon.withFastQualifiers(getLocalFastQualifiers()); 4597} 4598 4599inline bool QualType::isCanonical() const { 4600 return getTypePtr()->isCanonicalUnqualified(); 4601} 4602 4603inline bool QualType::isCanonicalAsParam() const { 4604 if (!isCanonical()) return false; 4605 if (hasLocalQualifiers()) return false; 4606 4607 const Type *T = getTypePtr(); 4608 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4609 return false; 4610 4611 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4612} 4613 4614inline bool QualType::isConstQualified() const { 4615 return isLocalConstQualified() || 4616 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4617} 4618 4619inline bool QualType::isRestrictQualified() const { 4620 return isLocalRestrictQualified() || 4621 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4622} 4623 4624 4625inline bool QualType::isVolatileQualified() const { 4626 return isLocalVolatileQualified() || 4627 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4628} 4629 4630inline bool QualType::hasQualifiers() const { 4631 return hasLocalQualifiers() || 4632 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4633} 4634 4635inline QualType QualType::getUnqualifiedType() const { 4636 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4637 return QualType(getTypePtr(), 0); 4638 4639 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4640} 4641 4642inline SplitQualType QualType::getSplitUnqualifiedType() const { 4643 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4644 return split(); 4645 4646 return getSplitUnqualifiedTypeImpl(*this); 4647} 4648 4649inline void QualType::removeLocalConst() { 4650 removeLocalFastQualifiers(Qualifiers::Const); 4651} 4652 4653inline void QualType::removeLocalRestrict() { 4654 removeLocalFastQualifiers(Qualifiers::Restrict); 4655} 4656 4657inline void QualType::removeLocalVolatile() { 4658 removeLocalFastQualifiers(Qualifiers::Volatile); 4659} 4660 4661inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4662 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4663 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4664 4665 // Fast path: we don't need to touch the slow qualifiers. 4666 removeLocalFastQualifiers(Mask); 4667} 4668 4669/// getAddressSpace - Return the address space of this type. 4670inline unsigned QualType::getAddressSpace() const { 4671 return getQualifiers().getAddressSpace(); 4672} 4673 4674/// getObjCGCAttr - Return the gc attribute of this type. 4675inline Qualifiers::GC QualType::getObjCGCAttr() const { 4676 return getQualifiers().getObjCGCAttr(); 4677} 4678 4679inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4680 if (const PointerType *PT = t.getAs<PointerType>()) { 4681 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4682 return FT->getExtInfo(); 4683 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4684 return FT->getExtInfo(); 4685 4686 return FunctionType::ExtInfo(); 4687} 4688 4689inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4690 return getFunctionExtInfo(*t); 4691} 4692 4693/// isMoreQualifiedThan - Determine whether this type is more 4694/// qualified than the Other type. For example, "const volatile int" 4695/// is more qualified than "const int", "volatile int", and 4696/// "int". However, it is not more qualified than "const volatile 4697/// int". 4698inline bool QualType::isMoreQualifiedThan(QualType other) const { 4699 Qualifiers myQuals = getQualifiers(); 4700 Qualifiers otherQuals = other.getQualifiers(); 4701 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4702} 4703 4704/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4705/// as qualified as the Other type. For example, "const volatile 4706/// int" is at least as qualified as "const int", "volatile int", 4707/// "int", and "const volatile int". 4708inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4709 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4710} 4711 4712/// getNonReferenceType - If Type is a reference type (e.g., const 4713/// int&), returns the type that the reference refers to ("const 4714/// int"). Otherwise, returns the type itself. This routine is used 4715/// throughout Sema to implement C++ 5p6: 4716/// 4717/// If an expression initially has the type "reference to T" (8.3.2, 4718/// 8.5.3), the type is adjusted to "T" prior to any further 4719/// analysis, the expression designates the object or function 4720/// denoted by the reference, and the expression is an lvalue. 4721inline QualType QualType::getNonReferenceType() const { 4722 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4723 return RefType->getPointeeType(); 4724 else 4725 return *this; 4726} 4727 4728inline bool QualType::isCForbiddenLValueType() const { 4729 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4730 getTypePtr()->isFunctionType()); 4731} 4732 4733/// \brief Tests whether the type is categorized as a fundamental type. 4734/// 4735/// \returns True for types specified in C++0x [basic.fundamental]. 4736inline bool Type::isFundamentalType() const { 4737 return isVoidType() || 4738 // FIXME: It's really annoying that we don't have an 4739 // 'isArithmeticType()' which agrees with the standard definition. 4740 (isArithmeticType() && !isEnumeralType()); 4741} 4742 4743/// \brief Tests whether the type is categorized as a compound type. 4744/// 4745/// \returns True for types specified in C++0x [basic.compound]. 4746inline bool Type::isCompoundType() const { 4747 // C++0x [basic.compound]p1: 4748 // Compound types can be constructed in the following ways: 4749 // -- arrays of objects of a given type [...]; 4750 return isArrayType() || 4751 // -- functions, which have parameters of given types [...]; 4752 isFunctionType() || 4753 // -- pointers to void or objects or functions [...]; 4754 isPointerType() || 4755 // -- references to objects or functions of a given type. [...] 4756 isReferenceType() || 4757 // -- classes containing a sequence of objects of various types, [...]; 4758 isRecordType() || 4759 // -- unions, which are classes capable of containing objects of different 4760 // types at different times; 4761 isUnionType() || 4762 // -- enumerations, which comprise a set of named constant values. [...]; 4763 isEnumeralType() || 4764 // -- pointers to non-static class members, [...]. 4765 isMemberPointerType(); 4766} 4767 4768inline bool Type::isFunctionType() const { 4769 return isa<FunctionType>(CanonicalType); 4770} 4771inline bool Type::isPointerType() const { 4772 return isa<PointerType>(CanonicalType); 4773} 4774inline bool Type::isAnyPointerType() const { 4775 return isPointerType() || isObjCObjectPointerType(); 4776} 4777inline bool Type::isBlockPointerType() const { 4778 return isa<BlockPointerType>(CanonicalType); 4779} 4780inline bool Type::isReferenceType() const { 4781 return isa<ReferenceType>(CanonicalType); 4782} 4783inline bool Type::isLValueReferenceType() const { 4784 return isa<LValueReferenceType>(CanonicalType); 4785} 4786inline bool Type::isRValueReferenceType() const { 4787 return isa<RValueReferenceType>(CanonicalType); 4788} 4789inline bool Type::isFunctionPointerType() const { 4790 if (const PointerType *T = getAs<PointerType>()) 4791 return T->getPointeeType()->isFunctionType(); 4792 else 4793 return false; 4794} 4795inline bool Type::isMemberPointerType() const { 4796 return isa<MemberPointerType>(CanonicalType); 4797} 4798inline bool Type::isMemberFunctionPointerType() const { 4799 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4800 return T->isMemberFunctionPointer(); 4801 else 4802 return false; 4803} 4804inline bool Type::isMemberDataPointerType() const { 4805 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4806 return T->isMemberDataPointer(); 4807 else 4808 return false; 4809} 4810inline bool Type::isArrayType() const { 4811 return isa<ArrayType>(CanonicalType); 4812} 4813inline bool Type::isConstantArrayType() const { 4814 return isa<ConstantArrayType>(CanonicalType); 4815} 4816inline bool Type::isIncompleteArrayType() const { 4817 return isa<IncompleteArrayType>(CanonicalType); 4818} 4819inline bool Type::isVariableArrayType() const { 4820 return isa<VariableArrayType>(CanonicalType); 4821} 4822inline bool Type::isDependentSizedArrayType() const { 4823 return isa<DependentSizedArrayType>(CanonicalType); 4824} 4825inline bool Type::isBuiltinType() const { 4826 return isa<BuiltinType>(CanonicalType); 4827} 4828inline bool Type::isRecordType() const { 4829 return isa<RecordType>(CanonicalType); 4830} 4831inline bool Type::isEnumeralType() const { 4832 return isa<EnumType>(CanonicalType); 4833} 4834inline bool Type::isAnyComplexType() const { 4835 return isa<ComplexType>(CanonicalType); 4836} 4837inline bool Type::isVectorType() const { 4838 return isa<VectorType>(CanonicalType); 4839} 4840inline bool Type::isExtVectorType() const { 4841 return isa<ExtVectorType>(CanonicalType); 4842} 4843inline bool Type::isObjCObjectPointerType() const { 4844 return isa<ObjCObjectPointerType>(CanonicalType); 4845} 4846inline bool Type::isObjCObjectType() const { 4847 return isa<ObjCObjectType>(CanonicalType); 4848} 4849inline bool Type::isObjCObjectOrInterfaceType() const { 4850 return isa<ObjCInterfaceType>(CanonicalType) || 4851 isa<ObjCObjectType>(CanonicalType); 4852} 4853inline bool Type::isAtomicType() const { 4854 return isa<AtomicType>(CanonicalType); 4855} 4856 4857inline bool Type::isObjCQualifiedIdType() const { 4858 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4859 return OPT->isObjCQualifiedIdType(); 4860 return false; 4861} 4862inline bool Type::isObjCQualifiedClassType() const { 4863 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4864 return OPT->isObjCQualifiedClassType(); 4865 return false; 4866} 4867inline bool Type::isObjCIdType() const { 4868 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4869 return OPT->isObjCIdType(); 4870 return false; 4871} 4872inline bool Type::isObjCClassType() const { 4873 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4874 return OPT->isObjCClassType(); 4875 return false; 4876} 4877inline bool Type::isObjCSelType() const { 4878 if (const PointerType *OPT = getAs<PointerType>()) 4879 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4880 return false; 4881} 4882inline bool Type::isObjCBuiltinType() const { 4883 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4884} 4885 4886inline bool Type::isImage1dT() const { 4887 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4888} 4889 4890inline bool Type::isImage1dArrayT() const { 4891 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4892} 4893 4894inline bool Type::isImage1dBufferT() const { 4895 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4896} 4897 4898inline bool Type::isImage2dT() const { 4899 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4900} 4901 4902inline bool Type::isImage2dArrayT() const { 4903 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4904} 4905 4906inline bool Type::isImage3dT() const { 4907 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4908} 4909 4910inline bool Type::isSamplerT() const { 4911 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4912} 4913 4914inline bool Type::isEventT() const { 4915 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4916} 4917 4918inline bool Type::isImageType() const { 4919 return isImage3dT() || 4920 isImage2dT() || isImage2dArrayT() || 4921 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4922} 4923 4924inline bool Type::isOpenCLSpecificType() const { 4925 return isSamplerT() || isEventT() || isImageType(); 4926} 4927 4928inline bool Type::isTemplateTypeParmType() const { 4929 return isa<TemplateTypeParmType>(CanonicalType); 4930} 4931 4932inline bool Type::isSpecificBuiltinType(unsigned K) const { 4933 if (const BuiltinType *BT = getAs<BuiltinType>()) 4934 if (BT->getKind() == (BuiltinType::Kind) K) 4935 return true; 4936 return false; 4937} 4938 4939inline bool Type::isPlaceholderType() const { 4940 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4941 return BT->isPlaceholderType(); 4942 return false; 4943} 4944 4945inline const BuiltinType *Type::getAsPlaceholderType() const { 4946 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4947 if (BT->isPlaceholderType()) 4948 return BT; 4949 return 0; 4950} 4951 4952inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4953 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4954 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4955 return (BT->getKind() == (BuiltinType::Kind) K); 4956 return false; 4957} 4958 4959inline bool Type::isNonOverloadPlaceholderType() const { 4960 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4961 return BT->isNonOverloadPlaceholderType(); 4962 return false; 4963} 4964 4965inline bool Type::isVoidType() const { 4966 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4967 return BT->getKind() == BuiltinType::Void; 4968 return false; 4969} 4970 4971inline bool Type::isHalfType() const { 4972 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4973 return BT->getKind() == BuiltinType::Half; 4974 // FIXME: Should we allow complex __fp16? Probably not. 4975 return false; 4976} 4977 4978inline bool Type::isNullPtrType() const { 4979 if (const BuiltinType *BT = getAs<BuiltinType>()) 4980 return BT->getKind() == BuiltinType::NullPtr; 4981 return false; 4982} 4983 4984extern bool IsEnumDeclComplete(EnumDecl *); 4985extern bool IsEnumDeclScoped(EnumDecl *); 4986 4987inline bool Type::isIntegerType() const { 4988 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4989 return BT->getKind() >= BuiltinType::Bool && 4990 BT->getKind() <= BuiltinType::Int128; 4991 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4992 // Incomplete enum types are not treated as integer types. 4993 // FIXME: In C++, enum types are never integer types. 4994 return IsEnumDeclComplete(ET->getDecl()) && 4995 !IsEnumDeclScoped(ET->getDecl()); 4996 } 4997 return false; 4998} 4999 5000inline bool Type::isScalarType() const { 5001 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5002 return BT->getKind() > BuiltinType::Void && 5003 BT->getKind() <= BuiltinType::NullPtr; 5004 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5005 // Enums are scalar types, but only if they are defined. Incomplete enums 5006 // are not treated as scalar types. 5007 return IsEnumDeclComplete(ET->getDecl()); 5008 return isa<PointerType>(CanonicalType) || 5009 isa<BlockPointerType>(CanonicalType) || 5010 isa<MemberPointerType>(CanonicalType) || 5011 isa<ComplexType>(CanonicalType) || 5012 isa<ObjCObjectPointerType>(CanonicalType); 5013} 5014 5015inline bool Type::isIntegralOrEnumerationType() const { 5016 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5017 return BT->getKind() >= BuiltinType::Bool && 5018 BT->getKind() <= BuiltinType::Int128; 5019 5020 // Check for a complete enum type; incomplete enum types are not properly an 5021 // enumeration type in the sense required here. 5022 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5023 return IsEnumDeclComplete(ET->getDecl()); 5024 5025 return false; 5026} 5027 5028inline bool Type::isBooleanType() const { 5029 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5030 return BT->getKind() == BuiltinType::Bool; 5031 return false; 5032} 5033 5034/// \brief Determines whether this is a type for which one can define 5035/// an overloaded operator. 5036inline bool Type::isOverloadableType() const { 5037 return isDependentType() || isRecordType() || isEnumeralType(); 5038} 5039 5040/// \brief Determines whether this type can decay to a pointer type. 5041inline bool Type::canDecayToPointerType() const { 5042 return isFunctionType() || isArrayType(); 5043} 5044 5045inline bool Type::hasPointerRepresentation() const { 5046 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5047 isObjCObjectPointerType() || isNullPtrType()); 5048} 5049 5050inline bool Type::hasObjCPointerRepresentation() const { 5051 return isObjCObjectPointerType(); 5052} 5053 5054inline const Type *Type::getBaseElementTypeUnsafe() const { 5055 const Type *type = this; 5056 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5057 type = arrayType->getElementType().getTypePtr(); 5058 return type; 5059} 5060 5061/// Insertion operator for diagnostics. This allows sending QualType's into a 5062/// diagnostic with <<. 5063inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5064 QualType T) { 5065 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5066 DiagnosticsEngine::ak_qualtype); 5067 return DB; 5068} 5069 5070/// Insertion operator for partial diagnostics. This allows sending QualType's 5071/// into a diagnostic with <<. 5072inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5073 QualType T) { 5074 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5075 DiagnosticsEngine::ak_qualtype); 5076 return PD; 5077} 5078 5079// Helper class template that is used by Type::getAs to ensure that one does 5080// not try to look through a qualified type to get to an array type. 5081template<typename T, 5082 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5083 llvm::is_base_of<ArrayType, T>::value)> 5084struct ArrayType_cannot_be_used_with_getAs { }; 5085 5086template<typename T> 5087struct ArrayType_cannot_be_used_with_getAs<T, true>; 5088 5089// Member-template getAs<specific type>'. 5090template <typename T> const T *Type::getAs() const { 5091 ArrayType_cannot_be_used_with_getAs<T> at; 5092 (void)at; 5093 5094 // If this is directly a T type, return it. 5095 if (const T *Ty = dyn_cast<T>(this)) 5096 return Ty; 5097 5098 // If the canonical form of this type isn't the right kind, reject it. 5099 if (!isa<T>(CanonicalType)) 5100 return 0; 5101 5102 // If this is a typedef for the type, strip the typedef off without 5103 // losing all typedef information. 5104 return cast<T>(getUnqualifiedDesugaredType()); 5105} 5106 5107inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5108 // If this is directly an array type, return it. 5109 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5110 return arr; 5111 5112 // If the canonical form of this type isn't the right kind, reject it. 5113 if (!isa<ArrayType>(CanonicalType)) 5114 return 0; 5115 5116 // If this is a typedef for the type, strip the typedef off without 5117 // losing all typedef information. 5118 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5119} 5120 5121template <typename T> const T *Type::castAs() const { 5122 ArrayType_cannot_be_used_with_getAs<T> at; 5123 (void) at; 5124 5125 assert(isa<T>(CanonicalType)); 5126 if (const T *ty = dyn_cast<T>(this)) return ty; 5127 return cast<T>(getUnqualifiedDesugaredType()); 5128} 5129 5130inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5131 assert(isa<ArrayType>(CanonicalType)); 5132 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5133 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5134} 5135 5136} // end namespace clang 5137 5138#endif 5139