Type.h revision 30a2e16f6c27f888dd11eba6bbbae1e980078fcb
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/AST/NestedNameSpecifier.h" 18#include "clang/AST/TemplateName.h" 19#include "clang/Basic/Diagnostic.h" 20#include "clang/Basic/ExceptionSpecificationType.h" 21#include "clang/Basic/IdentifierTable.h" 22#include "clang/Basic/LLVM.h" 23#include "clang/Basic/Linkage.h" 24#include "clang/Basic/PartialDiagnostic.h" 25#include "clang/Basic/Specifiers.h" 26#include "clang/Basic/Visibility.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32#include "llvm/ADT/Twine.h" 33#include "llvm/Support/ErrorHandling.h" 34#include "llvm/Support/type_traits.h" 35 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefNameDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class FunctionDecl; 85 class ObjCInterfaceDecl; 86 class ObjCProtocolDecl; 87 class ObjCMethodDecl; 88 class UnresolvedUsingTypenameDecl; 89 class Expr; 90 class Stmt; 91 class SourceLocation; 92 class StmtIteratorBase; 93 class TemplateArgument; 94 class TemplateArgumentLoc; 95 class TemplateArgumentListInfo; 96 class ElaboratedType; 97 class ExtQuals; 98 class ExtQualsTypeCommonBase; 99 struct PrintingPolicy; 100 101 template <typename> class CanQual; 102 typedef CanQual<Type> CanQualType; 103 104 // Provide forward declarations for all of the *Type classes 105#define TYPE(Class, Base) class Class##Type; 106#include "clang/AST/TypeNodes.def" 107 108/// Qualifiers - The collection of all-type qualifiers we support. 109/// Clang supports five independent qualifiers: 110/// * C99: const, volatile, and restrict 111/// * Embedded C (TR18037): address spaces 112/// * Objective C: the GC attributes (none, weak, or strong) 113class Qualifiers { 114public: 115 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 116 Const = 0x1, 117 Restrict = 0x2, 118 Volatile = 0x4, 119 CVRMask = Const | Volatile | Restrict 120 }; 121 122 enum GC { 123 GCNone = 0, 124 Weak, 125 Strong 126 }; 127 128 enum ObjCLifetime { 129 /// There is no lifetime qualification on this type. 130 OCL_None, 131 132 /// This object can be modified without requiring retains or 133 /// releases. 134 OCL_ExplicitNone, 135 136 /// Assigning into this object requires the old value to be 137 /// released and the new value to be retained. The timing of the 138 /// release of the old value is inexact: it may be moved to 139 /// immediately after the last known point where the value is 140 /// live. 141 OCL_Strong, 142 143 /// Reading or writing from this object requires a barrier call. 144 OCL_Weak, 145 146 /// Assigning into this object requires a lifetime extension. 147 OCL_Autoreleasing 148 }; 149 150 enum { 151 /// The maximum supported address space number. 152 /// 24 bits should be enough for anyone. 153 MaxAddressSpace = 0xffffffu, 154 155 /// The width of the "fast" qualifier mask. 156 FastWidth = 3, 157 158 /// The fast qualifier mask. 159 FastMask = (1 << FastWidth) - 1 160 }; 161 162 Qualifiers() : Mask(0) {} 163 164 /// \brief Returns the common set of qualifiers while removing them from 165 /// the given sets. 166 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { 167 // If both are only CVR-qualified, bit operations are sufficient. 168 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { 169 Qualifiers Q; 170 Q.Mask = L.Mask & R.Mask; 171 L.Mask &= ~Q.Mask; 172 R.Mask &= ~Q.Mask; 173 return Q; 174 } 175 176 Qualifiers Q; 177 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); 178 Q.addCVRQualifiers(CommonCRV); 179 L.removeCVRQualifiers(CommonCRV); 180 R.removeCVRQualifiers(CommonCRV); 181 182 if (L.getObjCGCAttr() == R.getObjCGCAttr()) { 183 Q.setObjCGCAttr(L.getObjCGCAttr()); 184 L.removeObjCGCAttr(); 185 R.removeObjCGCAttr(); 186 } 187 188 if (L.getObjCLifetime() == R.getObjCLifetime()) { 189 Q.setObjCLifetime(L.getObjCLifetime()); 190 L.removeObjCLifetime(); 191 R.removeObjCLifetime(); 192 } 193 194 if (L.getAddressSpace() == R.getAddressSpace()) { 195 Q.setAddressSpace(L.getAddressSpace()); 196 L.removeAddressSpace(); 197 R.removeAddressSpace(); 198 } 199 return Q; 200 } 201 202 static Qualifiers fromFastMask(unsigned Mask) { 203 Qualifiers Qs; 204 Qs.addFastQualifiers(Mask); 205 return Qs; 206 } 207 208 static Qualifiers fromCVRMask(unsigned CVR) { 209 Qualifiers Qs; 210 Qs.addCVRQualifiers(CVR); 211 return Qs; 212 } 213 214 // Deserialize qualifiers from an opaque representation. 215 static Qualifiers fromOpaqueValue(unsigned opaque) { 216 Qualifiers Qs; 217 Qs.Mask = opaque; 218 return Qs; 219 } 220 221 // Serialize these qualifiers into an opaque representation. 222 unsigned getAsOpaqueValue() const { 223 return Mask; 224 } 225 226 bool hasConst() const { return Mask & Const; } 227 void setConst(bool flag) { 228 Mask = (Mask & ~Const) | (flag ? Const : 0); 229 } 230 void removeConst() { Mask &= ~Const; } 231 void addConst() { Mask |= Const; } 232 233 bool hasVolatile() const { return Mask & Volatile; } 234 void setVolatile(bool flag) { 235 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 236 } 237 void removeVolatile() { Mask &= ~Volatile; } 238 void addVolatile() { Mask |= Volatile; } 239 240 bool hasRestrict() const { return Mask & Restrict; } 241 void setRestrict(bool flag) { 242 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 243 } 244 void removeRestrict() { Mask &= ~Restrict; } 245 void addRestrict() { Mask |= Restrict; } 246 247 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 248 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 249 void setCVRQualifiers(unsigned mask) { 250 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 251 Mask = (Mask & ~CVRMask) | mask; 252 } 253 void removeCVRQualifiers(unsigned mask) { 254 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 255 Mask &= ~mask; 256 } 257 void removeCVRQualifiers() { 258 removeCVRQualifiers(CVRMask); 259 } 260 void addCVRQualifiers(unsigned mask) { 261 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 262 Mask |= mask; 263 } 264 265 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 266 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 267 void setObjCGCAttr(GC type) { 268 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 269 } 270 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 271 void addObjCGCAttr(GC type) { 272 assert(type); 273 setObjCGCAttr(type); 274 } 275 Qualifiers withoutObjCGCAttr() const { 276 Qualifiers qs = *this; 277 qs.removeObjCGCAttr(); 278 return qs; 279 } 280 Qualifiers withoutObjCLifetime() const { 281 Qualifiers qs = *this; 282 qs.removeObjCLifetime(); 283 return qs; 284 } 285 286 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 287 ObjCLifetime getObjCLifetime() const { 288 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 289 } 290 void setObjCLifetime(ObjCLifetime type) { 291 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 292 } 293 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 294 void addObjCLifetime(ObjCLifetime type) { 295 assert(type); 296 assert(!hasObjCLifetime()); 297 Mask |= (type << LifetimeShift); 298 } 299 300 /// True if the lifetime is neither None or ExplicitNone. 301 bool hasNonTrivialObjCLifetime() const { 302 ObjCLifetime lifetime = getObjCLifetime(); 303 return (lifetime > OCL_ExplicitNone); 304 } 305 306 /// True if the lifetime is either strong or weak. 307 bool hasStrongOrWeakObjCLifetime() const { 308 ObjCLifetime lifetime = getObjCLifetime(); 309 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 310 } 311 312 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 313 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 314 void setAddressSpace(unsigned space) { 315 assert(space <= MaxAddressSpace); 316 Mask = (Mask & ~AddressSpaceMask) 317 | (((uint32_t) space) << AddressSpaceShift); 318 } 319 void removeAddressSpace() { setAddressSpace(0); } 320 void addAddressSpace(unsigned space) { 321 assert(space); 322 setAddressSpace(space); 323 } 324 325 // Fast qualifiers are those that can be allocated directly 326 // on a QualType object. 327 bool hasFastQualifiers() const { return getFastQualifiers(); } 328 unsigned getFastQualifiers() const { return Mask & FastMask; } 329 void setFastQualifiers(unsigned mask) { 330 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 331 Mask = (Mask & ~FastMask) | mask; 332 } 333 void removeFastQualifiers(unsigned mask) { 334 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 335 Mask &= ~mask; 336 } 337 void removeFastQualifiers() { 338 removeFastQualifiers(FastMask); 339 } 340 void addFastQualifiers(unsigned mask) { 341 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 342 Mask |= mask; 343 } 344 345 /// hasNonFastQualifiers - Return true if the set contains any 346 /// qualifiers which require an ExtQuals node to be allocated. 347 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 348 Qualifiers getNonFastQualifiers() const { 349 Qualifiers Quals = *this; 350 Quals.setFastQualifiers(0); 351 return Quals; 352 } 353 354 /// hasQualifiers - Return true if the set contains any qualifiers. 355 bool hasQualifiers() const { return Mask; } 356 bool empty() const { return !Mask; } 357 358 /// \brief Add the qualifiers from the given set to this set. 359 void addQualifiers(Qualifiers Q) { 360 // If the other set doesn't have any non-boolean qualifiers, just 361 // bit-or it in. 362 if (!(Q.Mask & ~CVRMask)) 363 Mask |= Q.Mask; 364 else { 365 Mask |= (Q.Mask & CVRMask); 366 if (Q.hasAddressSpace()) 367 addAddressSpace(Q.getAddressSpace()); 368 if (Q.hasObjCGCAttr()) 369 addObjCGCAttr(Q.getObjCGCAttr()); 370 if (Q.hasObjCLifetime()) 371 addObjCLifetime(Q.getObjCLifetime()); 372 } 373 } 374 375 /// \brief Remove the qualifiers from the given set from this set. 376 void removeQualifiers(Qualifiers Q) { 377 // If the other set doesn't have any non-boolean qualifiers, just 378 // bit-and the inverse in. 379 if (!(Q.Mask & ~CVRMask)) 380 Mask &= ~Q.Mask; 381 else { 382 Mask &= ~(Q.Mask & CVRMask); 383 if (getObjCGCAttr() == Q.getObjCGCAttr()) 384 removeObjCGCAttr(); 385 if (getObjCLifetime() == Q.getObjCLifetime()) 386 removeObjCLifetime(); 387 if (getAddressSpace() == Q.getAddressSpace()) 388 removeAddressSpace(); 389 } 390 } 391 392 /// \brief Add the qualifiers from the given set to this set, given that 393 /// they don't conflict. 394 void addConsistentQualifiers(Qualifiers qs) { 395 assert(getAddressSpace() == qs.getAddressSpace() || 396 !hasAddressSpace() || !qs.hasAddressSpace()); 397 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 398 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 399 assert(getObjCLifetime() == qs.getObjCLifetime() || 400 !hasObjCLifetime() || !qs.hasObjCLifetime()); 401 Mask |= qs.Mask; 402 } 403 404 /// \brief Determines if these qualifiers compatibly include another set. 405 /// Generally this answers the question of whether an object with the other 406 /// qualifiers can be safely used as an object with these qualifiers. 407 bool compatiblyIncludes(Qualifiers other) const { 408 return 409 // Address spaces must match exactly. 410 getAddressSpace() == other.getAddressSpace() && 411 // ObjC GC qualifiers can match, be added, or be removed, but can't be 412 // changed. 413 (getObjCGCAttr() == other.getObjCGCAttr() || 414 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 415 // ObjC lifetime qualifiers must match exactly. 416 getObjCLifetime() == other.getObjCLifetime() && 417 // CVR qualifiers may subset. 418 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 419 } 420 421 /// \brief Determines if these qualifiers compatibly include another set of 422 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 423 /// 424 /// One set of Objective-C lifetime qualifiers compatibly includes the other 425 /// if the lifetime qualifiers match, or if both are non-__weak and the 426 /// including set also contains the 'const' qualifier. 427 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 428 if (getObjCLifetime() == other.getObjCLifetime()) 429 return true; 430 431 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 432 return false; 433 434 return hasConst(); 435 } 436 437 /// \brief Determine whether this set of qualifiers is a strict superset of 438 /// another set of qualifiers, not considering qualifier compatibility. 439 bool isStrictSupersetOf(Qualifiers Other) const; 440 441 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 442 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 443 444 operator bool() const { return hasQualifiers(); } 445 446 Qualifiers &operator+=(Qualifiers R) { 447 addQualifiers(R); 448 return *this; 449 } 450 451 // Union two qualifier sets. If an enumerated qualifier appears 452 // in both sets, use the one from the right. 453 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 454 L += R; 455 return L; 456 } 457 458 Qualifiers &operator-=(Qualifiers R) { 459 removeQualifiers(R); 460 return *this; 461 } 462 463 /// \brief Compute the difference between two qualifier sets. 464 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 465 L -= R; 466 return L; 467 } 468 469 std::string getAsString() const; 470 std::string getAsString(const PrintingPolicy &Policy) const; 471 472 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; 473 void print(raw_ostream &OS, const PrintingPolicy &Policy, 474 bool appendSpaceIfNonEmpty = false) const; 475 476 void Profile(llvm::FoldingSetNodeID &ID) const { 477 ID.AddInteger(Mask); 478 } 479 480private: 481 482 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 483 // |C R V|GCAttr|Lifetime|AddressSpace| 484 uint32_t Mask; 485 486 static const uint32_t GCAttrMask = 0x18; 487 static const uint32_t GCAttrShift = 3; 488 static const uint32_t LifetimeMask = 0xE0; 489 static const uint32_t LifetimeShift = 5; 490 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 491 static const uint32_t AddressSpaceShift = 8; 492}; 493 494/// A std::pair-like structure for storing a qualified type split 495/// into its local qualifiers and its locally-unqualified type. 496struct SplitQualType { 497 /// The locally-unqualified type. 498 const Type *Ty; 499 500 /// The local qualifiers. 501 Qualifiers Quals; 502 503 SplitQualType() : Ty(0), Quals() {} 504 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 505 506 SplitQualType getSingleStepDesugaredType() const; // end of this file 507 508 // Make llvm::tie work. 509 operator std::pair<const Type *,Qualifiers>() const { 510 return std::pair<const Type *,Qualifiers>(Ty, Quals); 511 } 512 513 friend bool operator==(SplitQualType a, SplitQualType b) { 514 return a.Ty == b.Ty && a.Quals == b.Quals; 515 } 516 friend bool operator!=(SplitQualType a, SplitQualType b) { 517 return a.Ty != b.Ty || a.Quals != b.Quals; 518 } 519}; 520 521/// QualType - For efficiency, we don't store CV-qualified types as nodes on 522/// their own: instead each reference to a type stores the qualifiers. This 523/// greatly reduces the number of nodes we need to allocate for types (for 524/// example we only need one for 'int', 'const int', 'volatile int', 525/// 'const volatile int', etc). 526/// 527/// As an added efficiency bonus, instead of making this a pair, we 528/// just store the two bits we care about in the low bits of the 529/// pointer. To handle the packing/unpacking, we make QualType be a 530/// simple wrapper class that acts like a smart pointer. A third bit 531/// indicates whether there are extended qualifiers present, in which 532/// case the pointer points to a special structure. 533class QualType { 534 // Thankfully, these are efficiently composable. 535 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 536 Qualifiers::FastWidth> Value; 537 538 const ExtQuals *getExtQualsUnsafe() const { 539 return Value.getPointer().get<const ExtQuals*>(); 540 } 541 542 const Type *getTypePtrUnsafe() const { 543 return Value.getPointer().get<const Type*>(); 544 } 545 546 const ExtQualsTypeCommonBase *getCommonPtr() const { 547 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 548 uintptr_t CommonPtrVal 549 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 550 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 551 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 552 } 553 554 friend class QualifierCollector; 555public: 556 QualType() {} 557 558 QualType(const Type *Ptr, unsigned Quals) 559 : Value(Ptr, Quals) {} 560 QualType(const ExtQuals *Ptr, unsigned Quals) 561 : Value(Ptr, Quals) {} 562 563 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 564 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 565 566 /// Retrieves a pointer to the underlying (unqualified) type. 567 /// 568 /// This function requires that the type not be NULL. If the type might be 569 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 570 const Type *getTypePtr() const; 571 572 const Type *getTypePtrOrNull() const; 573 574 /// Retrieves a pointer to the name of the base type. 575 const IdentifierInfo *getBaseTypeIdentifier() const; 576 577 /// Divides a QualType into its unqualified type and a set of local 578 /// qualifiers. 579 SplitQualType split() const; 580 581 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 582 static QualType getFromOpaquePtr(const void *Ptr) { 583 QualType T; 584 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 585 return T; 586 } 587 588 const Type &operator*() const { 589 return *getTypePtr(); 590 } 591 592 const Type *operator->() const { 593 return getTypePtr(); 594 } 595 596 bool isCanonical() const; 597 bool isCanonicalAsParam() const; 598 599 /// isNull - Return true if this QualType doesn't point to a type yet. 600 bool isNull() const { 601 return Value.getPointer().isNull(); 602 } 603 604 /// \brief Determine whether this particular QualType instance has the 605 /// "const" qualifier set, without looking through typedefs that may have 606 /// added "const" at a different level. 607 bool isLocalConstQualified() const { 608 return (getLocalFastQualifiers() & Qualifiers::Const); 609 } 610 611 /// \brief Determine whether this type is const-qualified. 612 bool isConstQualified() const; 613 614 /// \brief Determine whether this particular QualType instance has the 615 /// "restrict" qualifier set, without looking through typedefs that may have 616 /// added "restrict" at a different level. 617 bool isLocalRestrictQualified() const { 618 return (getLocalFastQualifiers() & Qualifiers::Restrict); 619 } 620 621 /// \brief Determine whether this type is restrict-qualified. 622 bool isRestrictQualified() const; 623 624 /// \brief Determine whether this particular QualType instance has the 625 /// "volatile" qualifier set, without looking through typedefs that may have 626 /// added "volatile" at a different level. 627 bool isLocalVolatileQualified() const { 628 return (getLocalFastQualifiers() & Qualifiers::Volatile); 629 } 630 631 /// \brief Determine whether this type is volatile-qualified. 632 bool isVolatileQualified() const; 633 634 /// \brief Determine whether this particular QualType instance has any 635 /// qualifiers, without looking through any typedefs that might add 636 /// qualifiers at a different level. 637 bool hasLocalQualifiers() const { 638 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 639 } 640 641 /// \brief Determine whether this type has any qualifiers. 642 bool hasQualifiers() const; 643 644 /// \brief Determine whether this particular QualType instance has any 645 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 646 /// instance. 647 bool hasLocalNonFastQualifiers() const { 648 return Value.getPointer().is<const ExtQuals*>(); 649 } 650 651 /// \brief Retrieve the set of qualifiers local to this particular QualType 652 /// instance, not including any qualifiers acquired through typedefs or 653 /// other sugar. 654 Qualifiers getLocalQualifiers() const; 655 656 /// \brief Retrieve the set of qualifiers applied to this type. 657 Qualifiers getQualifiers() const; 658 659 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 660 /// local to this particular QualType instance, not including any qualifiers 661 /// acquired through typedefs or other sugar. 662 unsigned getLocalCVRQualifiers() const { 663 return getLocalFastQualifiers(); 664 } 665 666 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 667 /// applied to this type. 668 unsigned getCVRQualifiers() const; 669 670 bool isConstant(ASTContext& Ctx) const { 671 return QualType::isConstant(*this, Ctx); 672 } 673 674 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 675 bool isPODType(ASTContext &Context) const; 676 677 /// isCXX98PODType() - Return true if this is a POD type according to the 678 /// rules of the C++98 standard, regardless of the current compilation's 679 /// language. 680 bool isCXX98PODType(ASTContext &Context) const; 681 682 /// isCXX11PODType() - Return true if this is a POD type according to the 683 /// more relaxed rules of the C++11 standard, regardless of the current 684 /// compilation's language. 685 /// (C++0x [basic.types]p9) 686 bool isCXX11PODType(ASTContext &Context) const; 687 688 /// isTrivialType - Return true if this is a trivial type 689 /// (C++0x [basic.types]p9) 690 bool isTrivialType(ASTContext &Context) const; 691 692 /// isTriviallyCopyableType - Return true if this is a trivially 693 /// copyable type (C++0x [basic.types]p9) 694 bool isTriviallyCopyableType(ASTContext &Context) const; 695 696 // Don't promise in the API that anything besides 'const' can be 697 // easily added. 698 699 /// addConst - add the specified type qualifier to this QualType. 700 void addConst() { 701 addFastQualifiers(Qualifiers::Const); 702 } 703 QualType withConst() const { 704 return withFastQualifiers(Qualifiers::Const); 705 } 706 707 /// addVolatile - add the specified type qualifier to this QualType. 708 void addVolatile() { 709 addFastQualifiers(Qualifiers::Volatile); 710 } 711 QualType withVolatile() const { 712 return withFastQualifiers(Qualifiers::Volatile); 713 } 714 715 /// Add the restrict qualifier to this QualType. 716 void addRestrict() { 717 addFastQualifiers(Qualifiers::Restrict); 718 } 719 QualType withRestrict() const { 720 return withFastQualifiers(Qualifiers::Restrict); 721 } 722 723 QualType withCVRQualifiers(unsigned CVR) const { 724 return withFastQualifiers(CVR); 725 } 726 727 void addFastQualifiers(unsigned TQs) { 728 assert(!(TQs & ~Qualifiers::FastMask) 729 && "non-fast qualifier bits set in mask!"); 730 Value.setInt(Value.getInt() | TQs); 731 } 732 733 void removeLocalConst(); 734 void removeLocalVolatile(); 735 void removeLocalRestrict(); 736 void removeLocalCVRQualifiers(unsigned Mask); 737 738 void removeLocalFastQualifiers() { Value.setInt(0); } 739 void removeLocalFastQualifiers(unsigned Mask) { 740 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 741 Value.setInt(Value.getInt() & ~Mask); 742 } 743 744 // Creates a type with the given qualifiers in addition to any 745 // qualifiers already on this type. 746 QualType withFastQualifiers(unsigned TQs) const { 747 QualType T = *this; 748 T.addFastQualifiers(TQs); 749 return T; 750 } 751 752 // Creates a type with exactly the given fast qualifiers, removing 753 // any existing fast qualifiers. 754 QualType withExactLocalFastQualifiers(unsigned TQs) const { 755 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 756 } 757 758 // Removes fast qualifiers, but leaves any extended qualifiers in place. 759 QualType withoutLocalFastQualifiers() const { 760 QualType T = *this; 761 T.removeLocalFastQualifiers(); 762 return T; 763 } 764 765 QualType getCanonicalType() const; 766 767 /// \brief Return this type with all of the instance-specific qualifiers 768 /// removed, but without removing any qualifiers that may have been applied 769 /// through typedefs. 770 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 771 772 /// \brief Retrieve the unqualified variant of the given type, 773 /// removing as little sugar as possible. 774 /// 775 /// This routine looks through various kinds of sugar to find the 776 /// least-desugared type that is unqualified. For example, given: 777 /// 778 /// \code 779 /// typedef int Integer; 780 /// typedef const Integer CInteger; 781 /// typedef CInteger DifferenceType; 782 /// \endcode 783 /// 784 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 785 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 786 /// 787 /// The resulting type might still be qualified if it's an array 788 /// type. To strip qualifiers even from within an array type, use 789 /// ASTContext::getUnqualifiedArrayType. 790 inline QualType getUnqualifiedType() const; 791 792 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 793 /// given type, removing as little sugar as possible. 794 /// 795 /// Like getUnqualifiedType(), but also returns the set of 796 /// qualifiers that were built up. 797 /// 798 /// The resulting type might still be qualified if it's an array 799 /// type. To strip qualifiers even from within an array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982private: 983 // These methods are implemented in a separate translation unit; 984 // "static"-ize them to avoid creating temporary QualTypes in the 985 // caller. 986 static bool isConstant(QualType T, ASTContext& Ctx); 987 static QualType getDesugaredType(QualType T, const ASTContext &Context); 988 static SplitQualType getSplitDesugaredType(QualType T); 989 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 990 static QualType getSingleStepDesugaredTypeImpl(QualType type, 991 const ASTContext &C); 992 static QualType IgnoreParens(QualType T); 993 static DestructionKind isDestructedTypeImpl(QualType type); 994}; 995 996} // end clang. 997 998namespace llvm { 999/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000/// to a specific Type class. 1001template<> struct simplify_type<const ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 1004 return Val.getTypePtr(); 1005 } 1006}; 1007template<> struct simplify_type< ::clang::QualType> 1008 : public simplify_type<const ::clang::QualType> {}; 1009 1010// Teach SmallPtrSet that QualType is "basically a pointer". 1011template<> 1012class PointerLikeTypeTraits<clang::QualType> { 1013public: 1014 static inline void *getAsVoidPointer(clang::QualType P) { 1015 return P.getAsOpaquePtr(); 1016 } 1017 static inline clang::QualType getFromVoidPointer(void *P) { 1018 return clang::QualType::getFromOpaquePtr(P); 1019 } 1020 // Various qualifiers go in low bits. 1021 enum { NumLowBitsAvailable = 0 }; 1022}; 1023 1024} // end namespace llvm 1025 1026namespace clang { 1027 1028/// \brief Base class that is common to both the \c ExtQuals and \c Type 1029/// classes, which allows \c QualType to access the common fields between the 1030/// two. 1031/// 1032class ExtQualsTypeCommonBase { 1033 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1034 : BaseType(baseType), CanonicalType(canon) {} 1035 1036 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1037 /// a self-referential pointer (for \c Type). 1038 /// 1039 /// This pointer allows an efficient mapping from a QualType to its 1040 /// underlying type pointer. 1041 const Type *const BaseType; 1042 1043 /// \brief The canonical type of this type. A QualType. 1044 QualType CanonicalType; 1045 1046 friend class QualType; 1047 friend class Type; 1048 friend class ExtQuals; 1049}; 1050 1051/// ExtQuals - We can encode up to four bits in the low bits of a 1052/// type pointer, but there are many more type qualifiers that we want 1053/// to be able to apply to an arbitrary type. Therefore we have this 1054/// struct, intended to be heap-allocated and used by QualType to 1055/// store qualifiers. 1056/// 1057/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1058/// in three low bits on the QualType pointer; a fourth bit records whether 1059/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1060/// Objective-C GC attributes) are much more rare. 1061class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1062 // NOTE: changing the fast qualifiers should be straightforward as 1063 // long as you don't make 'const' non-fast. 1064 // 1. Qualifiers: 1065 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1066 // Fast qualifiers must occupy the low-order bits. 1067 // b) Update Qualifiers::FastWidth and FastMask. 1068 // 2. QualType: 1069 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1070 // b) Update remove{Volatile,Restrict}, defined near the end of 1071 // this header. 1072 // 3. ASTContext: 1073 // a) Update get{Volatile,Restrict}Type. 1074 1075 /// Quals - the immutable set of qualifiers applied by this 1076 /// node; always contains extended qualifiers. 1077 Qualifiers Quals; 1078 1079 ExtQuals *this_() { return this; } 1080 1081public: 1082 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1083 : ExtQualsTypeCommonBase(baseType, 1084 canon.isNull() ? QualType(this_(), 0) : canon), 1085 Quals(quals) 1086 { 1087 assert(Quals.hasNonFastQualifiers() 1088 && "ExtQuals created with no fast qualifiers"); 1089 assert(!Quals.hasFastQualifiers() 1090 && "ExtQuals created with fast qualifiers"); 1091 } 1092 1093 Qualifiers getQualifiers() const { return Quals; } 1094 1095 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1096 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1097 1098 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1099 Qualifiers::ObjCLifetime getObjCLifetime() const { 1100 return Quals.getObjCLifetime(); 1101 } 1102 1103 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1104 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1105 1106 const Type *getBaseType() const { return BaseType; } 1107 1108public: 1109 void Profile(llvm::FoldingSetNodeID &ID) const { 1110 Profile(ID, getBaseType(), Quals); 1111 } 1112 static void Profile(llvm::FoldingSetNodeID &ID, 1113 const Type *BaseType, 1114 Qualifiers Quals) { 1115 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1116 ID.AddPointer(BaseType); 1117 Quals.Profile(ID); 1118 } 1119}; 1120 1121/// \brief The kind of C++0x ref-qualifier associated with a function type, 1122/// which determines whether a member function's "this" object can be an 1123/// lvalue, rvalue, or neither. 1124enum RefQualifierKind { 1125 /// \brief No ref-qualifier was provided. 1126 RQ_None = 0, 1127 /// \brief An lvalue ref-qualifier was provided (\c &). 1128 RQ_LValue, 1129 /// \brief An rvalue ref-qualifier was provided (\c &&). 1130 RQ_RValue 1131}; 1132 1133/// Type - This is the base class of the type hierarchy. A central concept 1134/// with types is that each type always has a canonical type. A canonical type 1135/// is the type with any typedef names stripped out of it or the types it 1136/// references. For example, consider: 1137/// 1138/// typedef int foo; 1139/// typedef foo* bar; 1140/// 'int *' 'foo *' 'bar' 1141/// 1142/// There will be a Type object created for 'int'. Since int is canonical, its 1143/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1144/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1145/// there is a PointerType that represents 'int*', which, like 'int', is 1146/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1147/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1148/// is also 'int*'. 1149/// 1150/// Non-canonical types are useful for emitting diagnostics, without losing 1151/// information about typedefs being used. Canonical types are useful for type 1152/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1153/// about whether something has a particular form (e.g. is a function type), 1154/// because they implicitly, recursively, strip all typedefs out of a type. 1155/// 1156/// Types, once created, are immutable. 1157/// 1158class Type : public ExtQualsTypeCommonBase { 1159public: 1160 enum TypeClass { 1161#define TYPE(Class, Base) Class, 1162#define LAST_TYPE(Class) TypeLast = Class, 1163#define ABSTRACT_TYPE(Class, Base) 1164#include "clang/AST/TypeNodes.def" 1165 TagFirst = Record, TagLast = Enum 1166 }; 1167 1168private: 1169 Type(const Type &) LLVM_DELETED_FUNCTION; 1170 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1171 1172 /// Bitfields required by the Type class. 1173 class TypeBitfields { 1174 friend class Type; 1175 template <class T> friend class TypePropertyCache; 1176 1177 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1178 unsigned TC : 8; 1179 1180 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1181 unsigned Dependent : 1; 1182 1183 /// \brief Whether this type somehow involves a template parameter, even 1184 /// if the resolution of the type does not depend on a template parameter. 1185 unsigned InstantiationDependent : 1; 1186 1187 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1188 unsigned VariablyModified : 1; 1189 1190 /// \brief Whether this type contains an unexpanded parameter pack 1191 /// (for C++0x variadic templates). 1192 unsigned ContainsUnexpandedParameterPack : 1; 1193 1194 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1195 /// with 'Cache') is valid. If so, then this is a 1196 /// LangOptions::VisibilityMode+1. 1197 mutable unsigned CacheValidAndVisibility : 2; 1198 1199 /// \brief True if the visibility was set explicitly in the source code. 1200 mutable unsigned CachedExplicitVisibility : 1; 1201 1202 /// \brief Linkage of this type. 1203 mutable unsigned CachedLinkage : 2; 1204 1205 /// \brief Whether this type involves and local or unnamed types. 1206 mutable unsigned CachedLocalOrUnnamed : 1; 1207 1208 /// \brief FromAST - Whether this type comes from an AST file. 1209 mutable unsigned FromAST : 1; 1210 1211 bool isCacheValid() const { 1212 return (CacheValidAndVisibility != 0); 1213 } 1214 Visibility getVisibility() const { 1215 assert(isCacheValid() && "getting linkage from invalid cache"); 1216 return static_cast<Visibility>(CacheValidAndVisibility-1); 1217 } 1218 bool isVisibilityExplicit() const { 1219 assert(isCacheValid() && "getting linkage from invalid cache"); 1220 return CachedExplicitVisibility; 1221 } 1222 Linkage getLinkage() const { 1223 assert(isCacheValid() && "getting linkage from invalid cache"); 1224 return static_cast<Linkage>(CachedLinkage); 1225 } 1226 bool hasLocalOrUnnamedType() const { 1227 assert(isCacheValid() && "getting linkage from invalid cache"); 1228 return CachedLocalOrUnnamed; 1229 } 1230 }; 1231 enum { NumTypeBits = 19 }; 1232 1233protected: 1234 // These classes allow subclasses to somewhat cleanly pack bitfields 1235 // into Type. 1236 1237 class ArrayTypeBitfields { 1238 friend class ArrayType; 1239 1240 unsigned : NumTypeBits; 1241 1242 /// IndexTypeQuals - CVR qualifiers from declarations like 1243 /// 'int X[static restrict 4]'. For function parameters only. 1244 unsigned IndexTypeQuals : 3; 1245 1246 /// SizeModifier - storage class qualifiers from declarations like 1247 /// 'int X[static restrict 4]'. For function parameters only. 1248 /// Actually an ArrayType::ArraySizeModifier. 1249 unsigned SizeModifier : 3; 1250 }; 1251 1252 class BuiltinTypeBitfields { 1253 friend class BuiltinType; 1254 1255 unsigned : NumTypeBits; 1256 1257 /// The kind (BuiltinType::Kind) of builtin type this is. 1258 unsigned Kind : 8; 1259 }; 1260 1261 class FunctionTypeBitfields { 1262 friend class FunctionType; 1263 1264 unsigned : NumTypeBits; 1265 1266 /// Extra information which affects how the function is called, like 1267 /// regparm and the calling convention. 1268 unsigned ExtInfo : 9; 1269 1270 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1271 /// other bitfields. 1272 /// The qualifiers are part of FunctionProtoType because... 1273 /// 1274 /// C++ 8.3.5p4: The return type, the parameter type list and the 1275 /// cv-qualifier-seq, [...], are part of the function type. 1276 unsigned TypeQuals : 3; 1277 1278 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1279 /// 1280 /// This is a value of type \c RefQualifierKind. 1281 unsigned RefQualifier : 2; 1282 }; 1283 1284 class ObjCObjectTypeBitfields { 1285 friend class ObjCObjectType; 1286 1287 unsigned : NumTypeBits; 1288 1289 /// NumProtocols - The number of protocols stored directly on this 1290 /// object type. 1291 unsigned NumProtocols : 32 - NumTypeBits; 1292 }; 1293 1294 class ReferenceTypeBitfields { 1295 friend class ReferenceType; 1296 1297 unsigned : NumTypeBits; 1298 1299 /// True if the type was originally spelled with an lvalue sigil. 1300 /// This is never true of rvalue references but can also be false 1301 /// on lvalue references because of C++0x [dcl.typedef]p9, 1302 /// as follows: 1303 /// 1304 /// typedef int &ref; // lvalue, spelled lvalue 1305 /// typedef int &&rvref; // rvalue 1306 /// ref &a; // lvalue, inner ref, spelled lvalue 1307 /// ref &&a; // lvalue, inner ref 1308 /// rvref &a; // lvalue, inner ref, spelled lvalue 1309 /// rvref &&a; // rvalue, inner ref 1310 unsigned SpelledAsLValue : 1; 1311 1312 /// True if the inner type is a reference type. This only happens 1313 /// in non-canonical forms. 1314 unsigned InnerRef : 1; 1315 }; 1316 1317 class TypeWithKeywordBitfields { 1318 friend class TypeWithKeyword; 1319 1320 unsigned : NumTypeBits; 1321 1322 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1323 unsigned Keyword : 8; 1324 }; 1325 1326 class VectorTypeBitfields { 1327 friend class VectorType; 1328 1329 unsigned : NumTypeBits; 1330 1331 /// VecKind - The kind of vector, either a generic vector type or some 1332 /// target-specific vector type such as for AltiVec or Neon. 1333 unsigned VecKind : 3; 1334 1335 /// NumElements - The number of elements in the vector. 1336 unsigned NumElements : 29 - NumTypeBits; 1337 }; 1338 1339 class AttributedTypeBitfields { 1340 friend class AttributedType; 1341 1342 unsigned : NumTypeBits; 1343 1344 /// AttrKind - an AttributedType::Kind 1345 unsigned AttrKind : 32 - NumTypeBits; 1346 }; 1347 1348 union { 1349 TypeBitfields TypeBits; 1350 ArrayTypeBitfields ArrayTypeBits; 1351 AttributedTypeBitfields AttributedTypeBits; 1352 BuiltinTypeBitfields BuiltinTypeBits; 1353 FunctionTypeBitfields FunctionTypeBits; 1354 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1355 ReferenceTypeBitfields ReferenceTypeBits; 1356 TypeWithKeywordBitfields TypeWithKeywordBits; 1357 VectorTypeBitfields VectorTypeBits; 1358 }; 1359 1360private: 1361 /// \brief Set whether this type comes from an AST file. 1362 void setFromAST(bool V = true) const { 1363 TypeBits.FromAST = V; 1364 } 1365 1366 template <class T> friend class TypePropertyCache; 1367 1368protected: 1369 // silence VC++ warning C4355: 'this' : used in base member initializer list 1370 Type *this_() { return this; } 1371 Type(TypeClass tc, QualType canon, bool Dependent, 1372 bool InstantiationDependent, bool VariablyModified, 1373 bool ContainsUnexpandedParameterPack) 1374 : ExtQualsTypeCommonBase(this, 1375 canon.isNull() ? QualType(this_(), 0) : canon) { 1376 TypeBits.TC = tc; 1377 TypeBits.Dependent = Dependent; 1378 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1379 TypeBits.VariablyModified = VariablyModified; 1380 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1381 TypeBits.CacheValidAndVisibility = 0; 1382 TypeBits.CachedExplicitVisibility = false; 1383 TypeBits.CachedLocalOrUnnamed = false; 1384 TypeBits.CachedLinkage = NoLinkage; 1385 TypeBits.FromAST = false; 1386 } 1387 friend class ASTContext; 1388 1389 void setDependent(bool D = true) { 1390 TypeBits.Dependent = D; 1391 if (D) 1392 TypeBits.InstantiationDependent = true; 1393 } 1394 void setInstantiationDependent(bool D = true) { 1395 TypeBits.InstantiationDependent = D; } 1396 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1397 } 1398 void setContainsUnexpandedParameterPack(bool PP = true) { 1399 TypeBits.ContainsUnexpandedParameterPack = PP; 1400 } 1401 1402public: 1403 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1404 1405 /// \brief Whether this type comes from an AST file. 1406 bool isFromAST() const { return TypeBits.FromAST; } 1407 1408 /// \brief Whether this type is or contains an unexpanded parameter 1409 /// pack, used to support C++0x variadic templates. 1410 /// 1411 /// A type that contains a parameter pack shall be expanded by the 1412 /// ellipsis operator at some point. For example, the typedef in the 1413 /// following example contains an unexpanded parameter pack 'T': 1414 /// 1415 /// \code 1416 /// template<typename ...T> 1417 /// struct X { 1418 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1419 /// }; 1420 /// \endcode 1421 /// 1422 /// Note that this routine does not specify which 1423 bool containsUnexpandedParameterPack() const { 1424 return TypeBits.ContainsUnexpandedParameterPack; 1425 } 1426 1427 /// Determines if this type would be canonical if it had no further 1428 /// qualification. 1429 bool isCanonicalUnqualified() const { 1430 return CanonicalType == QualType(this, 0); 1431 } 1432 1433 /// Pull a single level of sugar off of this locally-unqualified type. 1434 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1435 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1436 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1437 1438 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1439 /// object types, function types, and incomplete types. 1440 1441 /// isIncompleteType - Return true if this is an incomplete type. 1442 /// A type that can describe objects, but which lacks information needed to 1443 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1444 /// routine will need to determine if the size is actually required. 1445 /// 1446 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1447 /// that can be completed (such as a C struct, C++ class, or Objective-C 1448 /// class), will be set to the declaration. 1449 bool isIncompleteType(NamedDecl **Def = 0) const; 1450 1451 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1452 /// type, in other words, not a function type. 1453 bool isIncompleteOrObjectType() const { 1454 return !isFunctionType(); 1455 } 1456 1457 /// \brief Determine whether this type is an object type. 1458 bool isObjectType() const { 1459 // C++ [basic.types]p8: 1460 // An object type is a (possibly cv-qualified) type that is not a 1461 // function type, not a reference type, and not a void type. 1462 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1463 } 1464 1465 /// isLiteralType - Return true if this is a literal type 1466 /// (C++0x [basic.types]p10) 1467 bool isLiteralType() const; 1468 1469 /// \brief Test if this type is a standard-layout type. 1470 /// (C++0x [basic.type]p9) 1471 bool isStandardLayoutType() const; 1472 1473 /// Helper methods to distinguish type categories. All type predicates 1474 /// operate on the canonical type, ignoring typedefs and qualifiers. 1475 1476 /// isBuiltinType - returns true if the type is a builtin type. 1477 bool isBuiltinType() const; 1478 1479 /// isSpecificBuiltinType - Test for a particular builtin type. 1480 bool isSpecificBuiltinType(unsigned K) const; 1481 1482 /// isPlaceholderType - Test for a type which does not represent an 1483 /// actual type-system type but is instead used as a placeholder for 1484 /// various convenient purposes within Clang. All such types are 1485 /// BuiltinTypes. 1486 bool isPlaceholderType() const; 1487 const BuiltinType *getAsPlaceholderType() const; 1488 1489 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1490 bool isSpecificPlaceholderType(unsigned K) const; 1491 1492 /// isNonOverloadPlaceholderType - Test for a placeholder type 1493 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1494 bool isNonOverloadPlaceholderType() const; 1495 1496 /// isIntegerType() does *not* include complex integers (a GCC extension). 1497 /// isComplexIntegerType() can be used to test for complex integers. 1498 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1499 bool isEnumeralType() const; 1500 bool isBooleanType() const; 1501 bool isCharType() const; 1502 bool isWideCharType() const; 1503 bool isChar16Type() const; 1504 bool isChar32Type() const; 1505 bool isAnyCharacterType() const; 1506 bool isIntegralType(ASTContext &Ctx) const; 1507 1508 /// \brief Determine whether this type is an integral or enumeration type. 1509 bool isIntegralOrEnumerationType() const; 1510 /// \brief Determine whether this type is an integral or unscoped enumeration 1511 /// type. 1512 bool isIntegralOrUnscopedEnumerationType() const; 1513 1514 /// Floating point categories. 1515 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1516 /// isComplexType() does *not* include complex integers (a GCC extension). 1517 /// isComplexIntegerType() can be used to test for complex integers. 1518 bool isComplexType() const; // C99 6.2.5p11 (complex) 1519 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1520 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1521 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1522 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1523 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1524 bool isVoidType() const; // C99 6.2.5p19 1525 bool isDerivedType() const; // C99 6.2.5p20 1526 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1527 bool isAggregateType() const; 1528 bool isFundamentalType() const; 1529 bool isCompoundType() const; 1530 1531 // Type Predicates: Check to see if this type is structurally the specified 1532 // type, ignoring typedefs and qualifiers. 1533 bool isFunctionType() const; 1534 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1535 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1536 bool isPointerType() const; 1537 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1538 bool isBlockPointerType() const; 1539 bool isVoidPointerType() const; 1540 bool isReferenceType() const; 1541 bool isLValueReferenceType() const; 1542 bool isRValueReferenceType() const; 1543 bool isFunctionPointerType() const; 1544 bool isMemberPointerType() const; 1545 bool isMemberFunctionPointerType() const; 1546 bool isMemberDataPointerType() const; 1547 bool isArrayType() const; 1548 bool isConstantArrayType() const; 1549 bool isIncompleteArrayType() const; 1550 bool isVariableArrayType() const; 1551 bool isDependentSizedArrayType() const; 1552 bool isRecordType() const; 1553 bool isClassType() const; 1554 bool isStructureType() const; 1555 bool isInterfaceType() const; 1556 bool isStructureOrClassType() const; 1557 bool isUnionType() const; 1558 bool isComplexIntegerType() const; // GCC _Complex integer type. 1559 bool isVectorType() const; // GCC vector type. 1560 bool isExtVectorType() const; // Extended vector type. 1561 bool isObjCObjectPointerType() const; // pointer to ObjC object 1562 bool isObjCRetainableType() const; // ObjC object or block pointer 1563 bool isObjCLifetimeType() const; // (array of)* retainable type 1564 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1565 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1566 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1567 // for the common case. 1568 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1569 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1570 bool isObjCQualifiedIdType() const; // id<foo> 1571 bool isObjCQualifiedClassType() const; // Class<foo> 1572 bool isObjCObjectOrInterfaceType() const; 1573 bool isObjCIdType() const; // id 1574 bool isObjCClassType() const; // Class 1575 bool isObjCSelType() const; // Class 1576 bool isObjCBuiltinType() const; // 'id' or 'Class' 1577 bool isObjCARCBridgableType() const; 1578 bool isCARCBridgableType() const; 1579 bool isTemplateTypeParmType() const; // C++ template type parameter 1580 bool isNullPtrType() const; // C++0x nullptr_t 1581 bool isAtomicType() const; // C11 _Atomic() 1582 1583 /// Determines if this type, which must satisfy 1584 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1585 /// than implicitly __strong. 1586 bool isObjCARCImplicitlyUnretainedType() const; 1587 1588 /// Return the implicit lifetime for this type, which must not be dependent. 1589 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1590 1591 enum ScalarTypeKind { 1592 STK_CPointer, 1593 STK_BlockPointer, 1594 STK_ObjCObjectPointer, 1595 STK_MemberPointer, 1596 STK_Bool, 1597 STK_Integral, 1598 STK_Floating, 1599 STK_IntegralComplex, 1600 STK_FloatingComplex 1601 }; 1602 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1603 ScalarTypeKind getScalarTypeKind() const; 1604 1605 /// isDependentType - Whether this type is a dependent type, meaning 1606 /// that its definition somehow depends on a template parameter 1607 /// (C++ [temp.dep.type]). 1608 bool isDependentType() const { return TypeBits.Dependent; } 1609 1610 /// \brief Determine whether this type is an instantiation-dependent type, 1611 /// meaning that the type involves a template parameter (even if the 1612 /// definition does not actually depend on the type substituted for that 1613 /// template parameter). 1614 bool isInstantiationDependentType() const { 1615 return TypeBits.InstantiationDependent; 1616 } 1617 1618 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1619 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1620 1621 /// \brief Whether this type involves a variable-length array type 1622 /// with a definite size. 1623 bool hasSizedVLAType() const; 1624 1625 /// \brief Whether this type is or contains a local or unnamed type. 1626 bool hasUnnamedOrLocalType() const; 1627 1628 bool isOverloadableType() const; 1629 1630 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1631 bool isElaboratedTypeSpecifier() const; 1632 1633 bool canDecayToPointerType() const; 1634 1635 /// hasPointerRepresentation - Whether this type is represented 1636 /// natively as a pointer; this includes pointers, references, block 1637 /// pointers, and Objective-C interface, qualified id, and qualified 1638 /// interface types, as well as nullptr_t. 1639 bool hasPointerRepresentation() const; 1640 1641 /// hasObjCPointerRepresentation - Whether this type can represent 1642 /// an objective pointer type for the purpose of GC'ability 1643 bool hasObjCPointerRepresentation() const; 1644 1645 /// \brief Determine whether this type has an integer representation 1646 /// of some sort, e.g., it is an integer type or a vector. 1647 bool hasIntegerRepresentation() const; 1648 1649 /// \brief Determine whether this type has an signed integer representation 1650 /// of some sort, e.g., it is an signed integer type or a vector. 1651 bool hasSignedIntegerRepresentation() const; 1652 1653 /// \brief Determine whether this type has an unsigned integer representation 1654 /// of some sort, e.g., it is an unsigned integer type or a vector. 1655 bool hasUnsignedIntegerRepresentation() const; 1656 1657 /// \brief Determine whether this type has a floating-point representation 1658 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1659 bool hasFloatingRepresentation() const; 1660 1661 // Type Checking Functions: Check to see if this type is structurally the 1662 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1663 // the best type we can. 1664 const RecordType *getAsStructureType() const; 1665 /// NOTE: getAs*ArrayType are methods on ASTContext. 1666 const RecordType *getAsUnionType() const; 1667 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1668 // The following is a convenience method that returns an ObjCObjectPointerType 1669 // for object declared using an interface. 1670 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1671 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1672 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1673 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1674 1675 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1676 /// because the type is a RecordType or because it is the injected-class-name 1677 /// type of a class template or class template partial specialization. 1678 CXXRecordDecl *getAsCXXRecordDecl() const; 1679 1680 /// If this is a pointer or reference to a RecordType, return the 1681 /// CXXRecordDecl that that type refers to. 1682 /// 1683 /// If this is not a pointer or reference, or the type being pointed to does 1684 /// not refer to a CXXRecordDecl, returns NULL. 1685 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1686 1687 /// \brief Get the AutoType whose type will be deduced for a variable with 1688 /// an initializer of this type. This looks through declarators like pointer 1689 /// types, but not through decltype or typedefs. 1690 AutoType *getContainedAutoType() const; 1691 1692 /// Member-template getAs<specific type>'. Look through sugar for 1693 /// an instance of \<specific type>. This scheme will eventually 1694 /// replace the specific getAsXXXX methods above. 1695 /// 1696 /// There are some specializations of this member template listed 1697 /// immediately following this class. 1698 template <typename T> const T *getAs() const; 1699 1700 /// A variant of getAs<> for array types which silently discards 1701 /// qualifiers from the outermost type. 1702 const ArrayType *getAsArrayTypeUnsafe() const; 1703 1704 /// Member-template castAs<specific type>. Look through sugar for 1705 /// the underlying instance of \<specific type>. 1706 /// 1707 /// This method has the same relationship to getAs<T> as cast<T> has 1708 /// to dyn_cast<T>; which is to say, the underlying type *must* 1709 /// have the intended type, and this method will never return null. 1710 template <typename T> const T *castAs() const; 1711 1712 /// A variant of castAs<> for array type which silently discards 1713 /// qualifiers from the outermost type. 1714 const ArrayType *castAsArrayTypeUnsafe() const; 1715 1716 /// getBaseElementTypeUnsafe - Get the base element type of this 1717 /// type, potentially discarding type qualifiers. This method 1718 /// should never be used when type qualifiers are meaningful. 1719 const Type *getBaseElementTypeUnsafe() const; 1720 1721 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1722 /// element type of the array, potentially with type qualifiers missing. 1723 /// This method should never be used when type qualifiers are meaningful. 1724 const Type *getArrayElementTypeNoTypeQual() const; 1725 1726 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1727 /// pointer, this returns the respective pointee. 1728 QualType getPointeeType() const; 1729 1730 /// getUnqualifiedDesugaredType() - Return the specified type with 1731 /// any "sugar" removed from the type, removing any typedefs, 1732 /// typeofs, etc., as well as any qualifiers. 1733 const Type *getUnqualifiedDesugaredType() const; 1734 1735 /// More type predicates useful for type checking/promotion 1736 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1737 1738 /// isSignedIntegerType - Return true if this is an integer type that is 1739 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1740 /// or an enum decl which has a signed representation. 1741 bool isSignedIntegerType() const; 1742 1743 /// isUnsignedIntegerType - Return true if this is an integer type that is 1744 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1745 /// or an enum decl which has an unsigned representation. 1746 bool isUnsignedIntegerType() const; 1747 1748 /// Determines whether this is an integer type that is signed or an 1749 /// enumeration types whose underlying type is a signed integer type. 1750 bool isSignedIntegerOrEnumerationType() const; 1751 1752 /// Determines whether this is an integer type that is unsigned or an 1753 /// enumeration types whose underlying type is a unsigned integer type. 1754 bool isUnsignedIntegerOrEnumerationType() const; 1755 1756 /// isConstantSizeType - Return true if this is not a variable sized type, 1757 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1758 /// incomplete types. 1759 bool isConstantSizeType() const; 1760 1761 /// isSpecifierType - Returns true if this type can be represented by some 1762 /// set of type specifiers. 1763 bool isSpecifierType() const; 1764 1765 /// \brief Determine the linkage of this type. 1766 Linkage getLinkage() const; 1767 1768 /// \brief Determine the visibility of this type. 1769 Visibility getVisibility() const; 1770 1771 /// \brief Return true if the visibility was explicitly set is the code. 1772 bool isVisibilityExplicit() const; 1773 1774 /// \brief Determine the linkage and visibility of this type. 1775 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1776 1777 /// \brief Note that the linkage is no longer known. 1778 void ClearLinkageCache(); 1779 1780 const char *getTypeClassName() const; 1781 1782 QualType getCanonicalTypeInternal() const { 1783 return CanonicalType; 1784 } 1785 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1786 LLVM_ATTRIBUTE_USED void dump() const; 1787 1788 friend class ASTReader; 1789 friend class ASTWriter; 1790}; 1791 1792/// \brief This will check for a TypedefType by removing any existing sugar 1793/// until it reaches a TypedefType or a non-sugared type. 1794template <> const TypedefType *Type::getAs() const; 1795 1796/// \brief This will check for a TemplateSpecializationType by removing any 1797/// existing sugar until it reaches a TemplateSpecializationType or a 1798/// non-sugared type. 1799template <> const TemplateSpecializationType *Type::getAs() const; 1800 1801// We can do canonical leaf types faster, because we don't have to 1802// worry about preserving child type decoration. 1803#define TYPE(Class, Base) 1804#define LEAF_TYPE(Class) \ 1805template <> inline const Class##Type *Type::getAs() const { \ 1806 return dyn_cast<Class##Type>(CanonicalType); \ 1807} \ 1808template <> inline const Class##Type *Type::castAs() const { \ 1809 return cast<Class##Type>(CanonicalType); \ 1810} 1811#include "clang/AST/TypeNodes.def" 1812 1813 1814/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1815/// types are always canonical and have a literal name field. 1816class BuiltinType : public Type { 1817public: 1818 enum Kind { 1819#define BUILTIN_TYPE(Id, SingletonId) Id, 1820#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1821#include "clang/AST/BuiltinTypes.def" 1822 }; 1823 1824public: 1825 BuiltinType(Kind K) 1826 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1827 /*InstantiationDependent=*/(K == Dependent), 1828 /*VariablyModified=*/false, 1829 /*Unexpanded paramter pack=*/false) { 1830 BuiltinTypeBits.Kind = K; 1831 } 1832 1833 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1834 StringRef getName(const PrintingPolicy &Policy) const; 1835 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1836 // The StringRef is null-terminated. 1837 StringRef str = getName(Policy); 1838 assert(!str.empty() && str.data()[str.size()] == '\0'); 1839 return str.data(); 1840 } 1841 1842 bool isSugared() const { return false; } 1843 QualType desugar() const { return QualType(this, 0); } 1844 1845 bool isInteger() const { 1846 return getKind() >= Bool && getKind() <= Int128; 1847 } 1848 1849 bool isSignedInteger() const { 1850 return getKind() >= Char_S && getKind() <= Int128; 1851 } 1852 1853 bool isUnsignedInteger() const { 1854 return getKind() >= Bool && getKind() <= UInt128; 1855 } 1856 1857 bool isFloatingPoint() const { 1858 return getKind() >= Half && getKind() <= LongDouble; 1859 } 1860 1861 /// Determines whether the given kind corresponds to a placeholder type. 1862 static bool isPlaceholderTypeKind(Kind K) { 1863 return K >= Overload; 1864 } 1865 1866 /// Determines whether this type is a placeholder type, i.e. a type 1867 /// which cannot appear in arbitrary positions in a fully-formed 1868 /// expression. 1869 bool isPlaceholderType() const { 1870 return isPlaceholderTypeKind(getKind()); 1871 } 1872 1873 /// Determines whether this type is a placeholder type other than 1874 /// Overload. Most placeholder types require only syntactic 1875 /// information about their context in order to be resolved (e.g. 1876 /// whether it is a call expression), which means they can (and 1877 /// should) be resolved in an earlier "phase" of analysis. 1878 /// Overload expressions sometimes pick up further information 1879 /// from their context, like whether the context expects a 1880 /// specific function-pointer type, and so frequently need 1881 /// special treatment. 1882 bool isNonOverloadPlaceholderType() const { 1883 return getKind() > Overload; 1884 } 1885 1886 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1887}; 1888 1889/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1890/// types (_Complex float etc) as well as the GCC integer complex extensions. 1891/// 1892class ComplexType : public Type, public llvm::FoldingSetNode { 1893 QualType ElementType; 1894 ComplexType(QualType Element, QualType CanonicalPtr) : 1895 Type(Complex, CanonicalPtr, Element->isDependentType(), 1896 Element->isInstantiationDependentType(), 1897 Element->isVariablyModifiedType(), 1898 Element->containsUnexpandedParameterPack()), 1899 ElementType(Element) { 1900 } 1901 friend class ASTContext; // ASTContext creates these. 1902 1903public: 1904 QualType getElementType() const { return ElementType; } 1905 1906 bool isSugared() const { return false; } 1907 QualType desugar() const { return QualType(this, 0); } 1908 1909 void Profile(llvm::FoldingSetNodeID &ID) { 1910 Profile(ID, getElementType()); 1911 } 1912 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1913 ID.AddPointer(Element.getAsOpaquePtr()); 1914 } 1915 1916 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1917}; 1918 1919/// ParenType - Sugar for parentheses used when specifying types. 1920/// 1921class ParenType : public Type, public llvm::FoldingSetNode { 1922 QualType Inner; 1923 1924 ParenType(QualType InnerType, QualType CanonType) : 1925 Type(Paren, CanonType, InnerType->isDependentType(), 1926 InnerType->isInstantiationDependentType(), 1927 InnerType->isVariablyModifiedType(), 1928 InnerType->containsUnexpandedParameterPack()), 1929 Inner(InnerType) { 1930 } 1931 friend class ASTContext; // ASTContext creates these. 1932 1933public: 1934 1935 QualType getInnerType() const { return Inner; } 1936 1937 bool isSugared() const { return true; } 1938 QualType desugar() const { return getInnerType(); } 1939 1940 void Profile(llvm::FoldingSetNodeID &ID) { 1941 Profile(ID, getInnerType()); 1942 } 1943 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1944 Inner.Profile(ID); 1945 } 1946 1947 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1948}; 1949 1950/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1951/// 1952class PointerType : public Type, public llvm::FoldingSetNode { 1953 QualType PointeeType; 1954 1955 PointerType(QualType Pointee, QualType CanonicalPtr) : 1956 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1957 Pointee->isInstantiationDependentType(), 1958 Pointee->isVariablyModifiedType(), 1959 Pointee->containsUnexpandedParameterPack()), 1960 PointeeType(Pointee) { 1961 } 1962 friend class ASTContext; // ASTContext creates these. 1963 1964public: 1965 1966 QualType getPointeeType() const { return PointeeType; } 1967 1968 bool isSugared() const { return false; } 1969 QualType desugar() const { return QualType(this, 0); } 1970 1971 void Profile(llvm::FoldingSetNodeID &ID) { 1972 Profile(ID, getPointeeType()); 1973 } 1974 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1975 ID.AddPointer(Pointee.getAsOpaquePtr()); 1976 } 1977 1978 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1979}; 1980 1981/// BlockPointerType - pointer to a block type. 1982/// This type is to represent types syntactically represented as 1983/// "void (^)(int)", etc. Pointee is required to always be a function type. 1984/// 1985class BlockPointerType : public Type, public llvm::FoldingSetNode { 1986 QualType PointeeType; // Block is some kind of pointer type 1987 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1988 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1989 Pointee->isInstantiationDependentType(), 1990 Pointee->isVariablyModifiedType(), 1991 Pointee->containsUnexpandedParameterPack()), 1992 PointeeType(Pointee) { 1993 } 1994 friend class ASTContext; // ASTContext creates these. 1995 1996public: 1997 1998 // Get the pointee type. Pointee is required to always be a function type. 1999 QualType getPointeeType() const { return PointeeType; } 2000 2001 bool isSugared() const { return false; } 2002 QualType desugar() const { return QualType(this, 0); } 2003 2004 void Profile(llvm::FoldingSetNodeID &ID) { 2005 Profile(ID, getPointeeType()); 2006 } 2007 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2008 ID.AddPointer(Pointee.getAsOpaquePtr()); 2009 } 2010 2011 static bool classof(const Type *T) { 2012 return T->getTypeClass() == BlockPointer; 2013 } 2014}; 2015 2016/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2017/// 2018class ReferenceType : public Type, public llvm::FoldingSetNode { 2019 QualType PointeeType; 2020 2021protected: 2022 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2023 bool SpelledAsLValue) : 2024 Type(tc, CanonicalRef, Referencee->isDependentType(), 2025 Referencee->isInstantiationDependentType(), 2026 Referencee->isVariablyModifiedType(), 2027 Referencee->containsUnexpandedParameterPack()), 2028 PointeeType(Referencee) 2029 { 2030 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2031 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2032 } 2033 2034public: 2035 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2036 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2037 2038 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2039 QualType getPointeeType() const { 2040 // FIXME: this might strip inner qualifiers; okay? 2041 const ReferenceType *T = this; 2042 while (T->isInnerRef()) 2043 T = T->PointeeType->castAs<ReferenceType>(); 2044 return T->PointeeType; 2045 } 2046 2047 void Profile(llvm::FoldingSetNodeID &ID) { 2048 Profile(ID, PointeeType, isSpelledAsLValue()); 2049 } 2050 static void Profile(llvm::FoldingSetNodeID &ID, 2051 QualType Referencee, 2052 bool SpelledAsLValue) { 2053 ID.AddPointer(Referencee.getAsOpaquePtr()); 2054 ID.AddBoolean(SpelledAsLValue); 2055 } 2056 2057 static bool classof(const Type *T) { 2058 return T->getTypeClass() == LValueReference || 2059 T->getTypeClass() == RValueReference; 2060 } 2061}; 2062 2063/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2064/// 2065class LValueReferenceType : public ReferenceType { 2066 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2067 bool SpelledAsLValue) : 2068 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2069 {} 2070 friend class ASTContext; // ASTContext creates these 2071public: 2072 bool isSugared() const { return false; } 2073 QualType desugar() const { return QualType(this, 0); } 2074 2075 static bool classof(const Type *T) { 2076 return T->getTypeClass() == LValueReference; 2077 } 2078}; 2079 2080/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2081/// 2082class RValueReferenceType : public ReferenceType { 2083 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2084 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2085 } 2086 friend class ASTContext; // ASTContext creates these 2087public: 2088 bool isSugared() const { return false; } 2089 QualType desugar() const { return QualType(this, 0); } 2090 2091 static bool classof(const Type *T) { 2092 return T->getTypeClass() == RValueReference; 2093 } 2094}; 2095 2096/// MemberPointerType - C++ 8.3.3 - Pointers to members 2097/// 2098class MemberPointerType : public Type, public llvm::FoldingSetNode { 2099 QualType PointeeType; 2100 /// The class of which the pointee is a member. Must ultimately be a 2101 /// RecordType, but could be a typedef or a template parameter too. 2102 const Type *Class; 2103 2104 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2105 Type(MemberPointer, CanonicalPtr, 2106 Cls->isDependentType() || Pointee->isDependentType(), 2107 (Cls->isInstantiationDependentType() || 2108 Pointee->isInstantiationDependentType()), 2109 Pointee->isVariablyModifiedType(), 2110 (Cls->containsUnexpandedParameterPack() || 2111 Pointee->containsUnexpandedParameterPack())), 2112 PointeeType(Pointee), Class(Cls) { 2113 } 2114 friend class ASTContext; // ASTContext creates these. 2115 2116public: 2117 QualType getPointeeType() const { return PointeeType; } 2118 2119 /// Returns true if the member type (i.e. the pointee type) is a 2120 /// function type rather than a data-member type. 2121 bool isMemberFunctionPointer() const { 2122 return PointeeType->isFunctionProtoType(); 2123 } 2124 2125 /// Returns true if the member type (i.e. the pointee type) is a 2126 /// data type rather than a function type. 2127 bool isMemberDataPointer() const { 2128 return !PointeeType->isFunctionProtoType(); 2129 } 2130 2131 const Type *getClass() const { return Class; } 2132 2133 bool isSugared() const { return false; } 2134 QualType desugar() const { return QualType(this, 0); } 2135 2136 void Profile(llvm::FoldingSetNodeID &ID) { 2137 Profile(ID, getPointeeType(), getClass()); 2138 } 2139 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2140 const Type *Class) { 2141 ID.AddPointer(Pointee.getAsOpaquePtr()); 2142 ID.AddPointer(Class); 2143 } 2144 2145 static bool classof(const Type *T) { 2146 return T->getTypeClass() == MemberPointer; 2147 } 2148}; 2149 2150/// ArrayType - C99 6.7.5.2 - Array Declarators. 2151/// 2152class ArrayType : public Type, public llvm::FoldingSetNode { 2153public: 2154 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2155 /// an array with a static size (e.g. int X[static 4]), or an array 2156 /// with a star size (e.g. int X[*]). 2157 /// 'static' is only allowed on function parameters. 2158 enum ArraySizeModifier { 2159 Normal, Static, Star 2160 }; 2161private: 2162 /// ElementType - The element type of the array. 2163 QualType ElementType; 2164 2165protected: 2166 // C++ [temp.dep.type]p1: 2167 // A type is dependent if it is... 2168 // - an array type constructed from any dependent type or whose 2169 // size is specified by a constant expression that is 2170 // value-dependent, 2171 ArrayType(TypeClass tc, QualType et, QualType can, 2172 ArraySizeModifier sm, unsigned tq, 2173 bool ContainsUnexpandedParameterPack) 2174 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2175 et->isInstantiationDependentType() || tc == DependentSizedArray, 2176 (tc == VariableArray || et->isVariablyModifiedType()), 2177 ContainsUnexpandedParameterPack), 2178 ElementType(et) { 2179 ArrayTypeBits.IndexTypeQuals = tq; 2180 ArrayTypeBits.SizeModifier = sm; 2181 } 2182 2183 friend class ASTContext; // ASTContext creates these. 2184 2185public: 2186 QualType getElementType() const { return ElementType; } 2187 ArraySizeModifier getSizeModifier() const { 2188 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2189 } 2190 Qualifiers getIndexTypeQualifiers() const { 2191 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2192 } 2193 unsigned getIndexTypeCVRQualifiers() const { 2194 return ArrayTypeBits.IndexTypeQuals; 2195 } 2196 2197 static bool classof(const Type *T) { 2198 return T->getTypeClass() == ConstantArray || 2199 T->getTypeClass() == VariableArray || 2200 T->getTypeClass() == IncompleteArray || 2201 T->getTypeClass() == DependentSizedArray; 2202 } 2203}; 2204 2205/// ConstantArrayType - This class represents the canonical version of 2206/// C arrays with a specified constant size. For example, the canonical 2207/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2208/// type is 'int' and the size is 404. 2209class ConstantArrayType : public ArrayType { 2210 llvm::APInt Size; // Allows us to unique the type. 2211 2212 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2213 ArraySizeModifier sm, unsigned tq) 2214 : ArrayType(ConstantArray, et, can, sm, tq, 2215 et->containsUnexpandedParameterPack()), 2216 Size(size) {} 2217protected: 2218 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2219 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2220 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2221 Size(size) {} 2222 friend class ASTContext; // ASTContext creates these. 2223public: 2224 const llvm::APInt &getSize() const { return Size; } 2225 bool isSugared() const { return false; } 2226 QualType desugar() const { return QualType(this, 0); } 2227 2228 2229 /// \brief Determine the number of bits required to address a member of 2230 // an array with the given element type and number of elements. 2231 static unsigned getNumAddressingBits(ASTContext &Context, 2232 QualType ElementType, 2233 const llvm::APInt &NumElements); 2234 2235 /// \brief Determine the maximum number of active bits that an array's size 2236 /// can require, which limits the maximum size of the array. 2237 static unsigned getMaxSizeBits(ASTContext &Context); 2238 2239 void Profile(llvm::FoldingSetNodeID &ID) { 2240 Profile(ID, getElementType(), getSize(), 2241 getSizeModifier(), getIndexTypeCVRQualifiers()); 2242 } 2243 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2244 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2245 unsigned TypeQuals) { 2246 ID.AddPointer(ET.getAsOpaquePtr()); 2247 ID.AddInteger(ArraySize.getZExtValue()); 2248 ID.AddInteger(SizeMod); 2249 ID.AddInteger(TypeQuals); 2250 } 2251 static bool classof(const Type *T) { 2252 return T->getTypeClass() == ConstantArray; 2253 } 2254}; 2255 2256/// IncompleteArrayType - This class represents C arrays with an unspecified 2257/// size. For example 'int A[]' has an IncompleteArrayType where the element 2258/// type is 'int' and the size is unspecified. 2259class IncompleteArrayType : public ArrayType { 2260 2261 IncompleteArrayType(QualType et, QualType can, 2262 ArraySizeModifier sm, unsigned tq) 2263 : ArrayType(IncompleteArray, et, can, sm, tq, 2264 et->containsUnexpandedParameterPack()) {} 2265 friend class ASTContext; // ASTContext creates these. 2266public: 2267 bool isSugared() const { return false; } 2268 QualType desugar() const { return QualType(this, 0); } 2269 2270 static bool classof(const Type *T) { 2271 return T->getTypeClass() == IncompleteArray; 2272 } 2273 2274 friend class StmtIteratorBase; 2275 2276 void Profile(llvm::FoldingSetNodeID &ID) { 2277 Profile(ID, getElementType(), getSizeModifier(), 2278 getIndexTypeCVRQualifiers()); 2279 } 2280 2281 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2282 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2283 ID.AddPointer(ET.getAsOpaquePtr()); 2284 ID.AddInteger(SizeMod); 2285 ID.AddInteger(TypeQuals); 2286 } 2287}; 2288 2289/// VariableArrayType - This class represents C arrays with a specified size 2290/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2291/// Since the size expression is an arbitrary expression, we store it as such. 2292/// 2293/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2294/// should not be: two lexically equivalent variable array types could mean 2295/// different things, for example, these variables do not have the same type 2296/// dynamically: 2297/// 2298/// void foo(int x) { 2299/// int Y[x]; 2300/// ++x; 2301/// int Z[x]; 2302/// } 2303/// 2304class VariableArrayType : public ArrayType { 2305 /// SizeExpr - An assignment expression. VLA's are only permitted within 2306 /// a function block. 2307 Stmt *SizeExpr; 2308 /// Brackets - The left and right array brackets. 2309 SourceRange Brackets; 2310 2311 VariableArrayType(QualType et, QualType can, Expr *e, 2312 ArraySizeModifier sm, unsigned tq, 2313 SourceRange brackets) 2314 : ArrayType(VariableArray, et, can, sm, tq, 2315 et->containsUnexpandedParameterPack()), 2316 SizeExpr((Stmt*) e), Brackets(brackets) {} 2317 friend class ASTContext; // ASTContext creates these. 2318 2319public: 2320 Expr *getSizeExpr() const { 2321 // We use C-style casts instead of cast<> here because we do not wish 2322 // to have a dependency of Type.h on Stmt.h/Expr.h. 2323 return (Expr*) SizeExpr; 2324 } 2325 SourceRange getBracketsRange() const { return Brackets; } 2326 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2327 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2328 2329 bool isSugared() const { return false; } 2330 QualType desugar() const { return QualType(this, 0); } 2331 2332 static bool classof(const Type *T) { 2333 return T->getTypeClass() == VariableArray; 2334 } 2335 2336 friend class StmtIteratorBase; 2337 2338 void Profile(llvm::FoldingSetNodeID &ID) { 2339 llvm_unreachable("Cannot unique VariableArrayTypes."); 2340 } 2341}; 2342 2343/// DependentSizedArrayType - This type represents an array type in 2344/// C++ whose size is a value-dependent expression. For example: 2345/// 2346/// \code 2347/// template<typename T, int Size> 2348/// class array { 2349/// T data[Size]; 2350/// }; 2351/// \endcode 2352/// 2353/// For these types, we won't actually know what the array bound is 2354/// until template instantiation occurs, at which point this will 2355/// become either a ConstantArrayType or a VariableArrayType. 2356class DependentSizedArrayType : public ArrayType { 2357 const ASTContext &Context; 2358 2359 /// \brief An assignment expression that will instantiate to the 2360 /// size of the array. 2361 /// 2362 /// The expression itself might be NULL, in which case the array 2363 /// type will have its size deduced from an initializer. 2364 Stmt *SizeExpr; 2365 2366 /// Brackets - The left and right array brackets. 2367 SourceRange Brackets; 2368 2369 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2370 Expr *e, ArraySizeModifier sm, unsigned tq, 2371 SourceRange brackets); 2372 2373 friend class ASTContext; // ASTContext creates these. 2374 2375public: 2376 Expr *getSizeExpr() const { 2377 // We use C-style casts instead of cast<> here because we do not wish 2378 // to have a dependency of Type.h on Stmt.h/Expr.h. 2379 return (Expr*) SizeExpr; 2380 } 2381 SourceRange getBracketsRange() const { return Brackets; } 2382 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2383 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2384 2385 bool isSugared() const { return false; } 2386 QualType desugar() const { return QualType(this, 0); } 2387 2388 static bool classof(const Type *T) { 2389 return T->getTypeClass() == DependentSizedArray; 2390 } 2391 2392 friend class StmtIteratorBase; 2393 2394 2395 void Profile(llvm::FoldingSetNodeID &ID) { 2396 Profile(ID, Context, getElementType(), 2397 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2398 } 2399 2400 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2401 QualType ET, ArraySizeModifier SizeMod, 2402 unsigned TypeQuals, Expr *E); 2403}; 2404 2405/// DependentSizedExtVectorType - This type represent an extended vector type 2406/// where either the type or size is dependent. For example: 2407/// @code 2408/// template<typename T, int Size> 2409/// class vector { 2410/// typedef T __attribute__((ext_vector_type(Size))) type; 2411/// } 2412/// @endcode 2413class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2414 const ASTContext &Context; 2415 Expr *SizeExpr; 2416 /// ElementType - The element type of the array. 2417 QualType ElementType; 2418 SourceLocation loc; 2419 2420 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2421 QualType can, Expr *SizeExpr, SourceLocation loc); 2422 2423 friend class ASTContext; 2424 2425public: 2426 Expr *getSizeExpr() const { return SizeExpr; } 2427 QualType getElementType() const { return ElementType; } 2428 SourceLocation getAttributeLoc() const { return loc; } 2429 2430 bool isSugared() const { return false; } 2431 QualType desugar() const { return QualType(this, 0); } 2432 2433 static bool classof(const Type *T) { 2434 return T->getTypeClass() == DependentSizedExtVector; 2435 } 2436 2437 void Profile(llvm::FoldingSetNodeID &ID) { 2438 Profile(ID, Context, getElementType(), getSizeExpr()); 2439 } 2440 2441 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2442 QualType ElementType, Expr *SizeExpr); 2443}; 2444 2445 2446/// VectorType - GCC generic vector type. This type is created using 2447/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2448/// bytes; or from an Altivec __vector or vector declaration. 2449/// Since the constructor takes the number of vector elements, the 2450/// client is responsible for converting the size into the number of elements. 2451class VectorType : public Type, public llvm::FoldingSetNode { 2452public: 2453 enum VectorKind { 2454 GenericVector, // not a target-specific vector type 2455 AltiVecVector, // is AltiVec vector 2456 AltiVecPixel, // is AltiVec 'vector Pixel' 2457 AltiVecBool, // is AltiVec 'vector bool ...' 2458 NeonVector, // is ARM Neon vector 2459 NeonPolyVector // is ARM Neon polynomial vector 2460 }; 2461protected: 2462 /// ElementType - The element type of the vector. 2463 QualType ElementType; 2464 2465 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2466 VectorKind vecKind); 2467 2468 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2469 QualType canonType, VectorKind vecKind); 2470 2471 friend class ASTContext; // ASTContext creates these. 2472 2473public: 2474 2475 QualType getElementType() const { return ElementType; } 2476 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2477 2478 bool isSugared() const { return false; } 2479 QualType desugar() const { return QualType(this, 0); } 2480 2481 VectorKind getVectorKind() const { 2482 return VectorKind(VectorTypeBits.VecKind); 2483 } 2484 2485 void Profile(llvm::FoldingSetNodeID &ID) { 2486 Profile(ID, getElementType(), getNumElements(), 2487 getTypeClass(), getVectorKind()); 2488 } 2489 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2490 unsigned NumElements, TypeClass TypeClass, 2491 VectorKind VecKind) { 2492 ID.AddPointer(ElementType.getAsOpaquePtr()); 2493 ID.AddInteger(NumElements); 2494 ID.AddInteger(TypeClass); 2495 ID.AddInteger(VecKind); 2496 } 2497 2498 static bool classof(const Type *T) { 2499 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2500 } 2501}; 2502 2503/// ExtVectorType - Extended vector type. This type is created using 2504/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2505/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2506/// class enables syntactic extensions, like Vector Components for accessing 2507/// points, colors, and textures (modeled after OpenGL Shading Language). 2508class ExtVectorType : public VectorType { 2509 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2510 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2511 friend class ASTContext; // ASTContext creates these. 2512public: 2513 static int getPointAccessorIdx(char c) { 2514 switch (c) { 2515 default: return -1; 2516 case 'x': return 0; 2517 case 'y': return 1; 2518 case 'z': return 2; 2519 case 'w': return 3; 2520 } 2521 } 2522 static int getNumericAccessorIdx(char c) { 2523 switch (c) { 2524 default: return -1; 2525 case '0': return 0; 2526 case '1': return 1; 2527 case '2': return 2; 2528 case '3': return 3; 2529 case '4': return 4; 2530 case '5': return 5; 2531 case '6': return 6; 2532 case '7': return 7; 2533 case '8': return 8; 2534 case '9': return 9; 2535 case 'A': 2536 case 'a': return 10; 2537 case 'B': 2538 case 'b': return 11; 2539 case 'C': 2540 case 'c': return 12; 2541 case 'D': 2542 case 'd': return 13; 2543 case 'E': 2544 case 'e': return 14; 2545 case 'F': 2546 case 'f': return 15; 2547 } 2548 } 2549 2550 static int getAccessorIdx(char c) { 2551 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2552 return getNumericAccessorIdx(c); 2553 } 2554 2555 bool isAccessorWithinNumElements(char c) const { 2556 if (int idx = getAccessorIdx(c)+1) 2557 return unsigned(idx-1) < getNumElements(); 2558 return false; 2559 } 2560 bool isSugared() const { return false; } 2561 QualType desugar() const { return QualType(this, 0); } 2562 2563 static bool classof(const Type *T) { 2564 return T->getTypeClass() == ExtVector; 2565 } 2566}; 2567 2568/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2569/// class of FunctionNoProtoType and FunctionProtoType. 2570/// 2571class FunctionType : public Type { 2572 // The type returned by the function. 2573 QualType ResultType; 2574 2575 public: 2576 /// ExtInfo - A class which abstracts out some details necessary for 2577 /// making a call. 2578 /// 2579 /// It is not actually used directly for storing this information in 2580 /// a FunctionType, although FunctionType does currently use the 2581 /// same bit-pattern. 2582 /// 2583 // If you add a field (say Foo), other than the obvious places (both, 2584 // constructors, compile failures), what you need to update is 2585 // * Operator== 2586 // * getFoo 2587 // * withFoo 2588 // * functionType. Add Foo, getFoo. 2589 // * ASTContext::getFooType 2590 // * ASTContext::mergeFunctionTypes 2591 // * FunctionNoProtoType::Profile 2592 // * FunctionProtoType::Profile 2593 // * TypePrinter::PrintFunctionProto 2594 // * AST read and write 2595 // * Codegen 2596 class ExtInfo { 2597 // Feel free to rearrange or add bits, but if you go over 9, 2598 // you'll need to adjust both the Bits field below and 2599 // Type::FunctionTypeBitfields. 2600 2601 // | CC |noreturn|produces|regparm| 2602 // |0 .. 3| 4 | 5 | 6 .. 8| 2603 // 2604 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2605 enum { CallConvMask = 0xF }; 2606 enum { NoReturnMask = 0x10 }; 2607 enum { ProducesResultMask = 0x20 }; 2608 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2609 RegParmOffset = 6 }; // Assumed to be the last field 2610 2611 uint16_t Bits; 2612 2613 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2614 2615 friend class FunctionType; 2616 2617 public: 2618 // Constructor with no defaults. Use this when you know that you 2619 // have all the elements (when reading an AST file for example). 2620 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2621 bool producesResult) { 2622 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2623 Bits = ((unsigned) cc) | 2624 (noReturn ? NoReturnMask : 0) | 2625 (producesResult ? ProducesResultMask : 0) | 2626 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2627 } 2628 2629 // Constructor with all defaults. Use when for example creating a 2630 // function know to use defaults. 2631 ExtInfo() : Bits(0) {} 2632 2633 bool getNoReturn() const { return Bits & NoReturnMask; } 2634 bool getProducesResult() const { return Bits & ProducesResultMask; } 2635 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2636 unsigned getRegParm() const { 2637 unsigned RegParm = Bits >> RegParmOffset; 2638 if (RegParm > 0) 2639 --RegParm; 2640 return RegParm; 2641 } 2642 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2643 2644 bool operator==(ExtInfo Other) const { 2645 return Bits == Other.Bits; 2646 } 2647 bool operator!=(ExtInfo Other) const { 2648 return Bits != Other.Bits; 2649 } 2650 2651 // Note that we don't have setters. That is by design, use 2652 // the following with methods instead of mutating these objects. 2653 2654 ExtInfo withNoReturn(bool noReturn) const { 2655 if (noReturn) 2656 return ExtInfo(Bits | NoReturnMask); 2657 else 2658 return ExtInfo(Bits & ~NoReturnMask); 2659 } 2660 2661 ExtInfo withProducesResult(bool producesResult) const { 2662 if (producesResult) 2663 return ExtInfo(Bits | ProducesResultMask); 2664 else 2665 return ExtInfo(Bits & ~ProducesResultMask); 2666 } 2667 2668 ExtInfo withRegParm(unsigned RegParm) const { 2669 assert(RegParm < 7 && "Invalid regparm value"); 2670 return ExtInfo((Bits & ~RegParmMask) | 2671 ((RegParm + 1) << RegParmOffset)); 2672 } 2673 2674 ExtInfo withCallingConv(CallingConv cc) const { 2675 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2676 } 2677 2678 void Profile(llvm::FoldingSetNodeID &ID) const { 2679 ID.AddInteger(Bits); 2680 } 2681 }; 2682 2683protected: 2684 FunctionType(TypeClass tc, QualType res, 2685 unsigned typeQuals, RefQualifierKind RefQualifier, 2686 QualType Canonical, bool Dependent, 2687 bool InstantiationDependent, 2688 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2689 ExtInfo Info) 2690 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2691 ContainsUnexpandedParameterPack), 2692 ResultType(res) { 2693 FunctionTypeBits.ExtInfo = Info.Bits; 2694 FunctionTypeBits.TypeQuals = typeQuals; 2695 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2696 } 2697 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2698 2699 RefQualifierKind getRefQualifier() const { 2700 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2701 } 2702 2703public: 2704 2705 QualType getResultType() const { return ResultType; } 2706 2707 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2708 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2709 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2710 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2711 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2712 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2713 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2714 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2715 2716 /// \brief Determine the type of an expression that calls a function of 2717 /// this type. 2718 QualType getCallResultType(ASTContext &Context) const { 2719 return getResultType().getNonLValueExprType(Context); 2720 } 2721 2722 static StringRef getNameForCallConv(CallingConv CC); 2723 2724 static bool classof(const Type *T) { 2725 return T->getTypeClass() == FunctionNoProto || 2726 T->getTypeClass() == FunctionProto; 2727 } 2728}; 2729 2730/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2731/// no information available about its arguments. 2732class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2733 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2734 : FunctionType(FunctionNoProto, Result, 0, RQ_None, Canonical, 2735 /*Dependent=*/false, /*InstantiationDependent=*/false, 2736 Result->isVariablyModifiedType(), 2737 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2738 2739 friend class ASTContext; // ASTContext creates these. 2740 2741public: 2742 // No additional state past what FunctionType provides. 2743 2744 bool isSugared() const { return false; } 2745 QualType desugar() const { return QualType(this, 0); } 2746 2747 void Profile(llvm::FoldingSetNodeID &ID) { 2748 Profile(ID, getResultType(), getExtInfo()); 2749 } 2750 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2751 ExtInfo Info) { 2752 Info.Profile(ID); 2753 ID.AddPointer(ResultType.getAsOpaquePtr()); 2754 } 2755 2756 static bool classof(const Type *T) { 2757 return T->getTypeClass() == FunctionNoProto; 2758 } 2759}; 2760 2761/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2762/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2763/// arguments, not as having a single void argument. Such a type can have an 2764/// exception specification, but this specification is not part of the canonical 2765/// type. 2766class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2767public: 2768 /// ExtProtoInfo - Extra information about a function prototype. 2769 struct ExtProtoInfo { 2770 ExtProtoInfo() : 2771 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2772 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2773 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2774 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2775 ConsumedArguments(0) {} 2776 2777 FunctionType::ExtInfo ExtInfo; 2778 bool Variadic : 1; 2779 bool HasTrailingReturn : 1; 2780 unsigned char TypeQuals; 2781 ExceptionSpecificationType ExceptionSpecType; 2782 RefQualifierKind RefQualifier; 2783 unsigned NumExceptions; 2784 const QualType *Exceptions; 2785 Expr *NoexceptExpr; 2786 FunctionDecl *ExceptionSpecDecl; 2787 FunctionDecl *ExceptionSpecTemplate; 2788 const bool *ConsumedArguments; 2789 }; 2790 2791private: 2792 /// \brief Determine whether there are any argument types that 2793 /// contain an unexpanded parameter pack. 2794 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2795 unsigned numArgs) { 2796 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2797 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2798 return true; 2799 2800 return false; 2801 } 2802 2803 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2804 QualType canonical, const ExtProtoInfo &epi); 2805 2806 /// NumArgs - The number of arguments this function has, not counting '...'. 2807 unsigned NumArgs : 17; 2808 2809 /// NumExceptions - The number of types in the exception spec, if any. 2810 unsigned NumExceptions : 9; 2811 2812 /// ExceptionSpecType - The type of exception specification this function has. 2813 unsigned ExceptionSpecType : 3; 2814 2815 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2816 unsigned HasAnyConsumedArgs : 1; 2817 2818 /// Variadic - Whether the function is variadic. 2819 unsigned Variadic : 1; 2820 2821 /// HasTrailingReturn - Whether this function has a trailing return type. 2822 unsigned HasTrailingReturn : 1; 2823 2824 // ArgInfo - There is an variable size array after the class in memory that 2825 // holds the argument types. 2826 2827 // Exceptions - There is another variable size array after ArgInfo that 2828 // holds the exception types. 2829 2830 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2831 // to the expression in the noexcept() specifier. 2832 2833 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2834 // be a pair of FunctionDecl* pointing to the function which should be used to 2835 // instantiate this function type's exception specification, and the function 2836 // from which it should be instantiated. 2837 2838 // ConsumedArgs - A variable size array, following Exceptions 2839 // and of length NumArgs, holding flags indicating which arguments 2840 // are consumed. This only appears if HasAnyConsumedArgs is true. 2841 2842 friend class ASTContext; // ASTContext creates these. 2843 2844 const bool *getConsumedArgsBuffer() const { 2845 assert(hasAnyConsumedArgs()); 2846 2847 // Find the end of the exceptions. 2848 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2849 if (getExceptionSpecType() != EST_ComputedNoexcept) 2850 eh_end += NumExceptions; 2851 else 2852 eh_end += 1; // NoexceptExpr 2853 2854 return reinterpret_cast<const bool*>(eh_end); 2855 } 2856 2857public: 2858 unsigned getNumArgs() const { return NumArgs; } 2859 QualType getArgType(unsigned i) const { 2860 assert(i < NumArgs && "Invalid argument number!"); 2861 return arg_type_begin()[i]; 2862 } 2863 2864 ExtProtoInfo getExtProtoInfo() const { 2865 ExtProtoInfo EPI; 2866 EPI.ExtInfo = getExtInfo(); 2867 EPI.Variadic = isVariadic(); 2868 EPI.HasTrailingReturn = hasTrailingReturn(); 2869 EPI.ExceptionSpecType = getExceptionSpecType(); 2870 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2871 EPI.RefQualifier = getRefQualifier(); 2872 if (EPI.ExceptionSpecType == EST_Dynamic) { 2873 EPI.NumExceptions = NumExceptions; 2874 EPI.Exceptions = exception_begin(); 2875 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2876 EPI.NoexceptExpr = getNoexceptExpr(); 2877 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2878 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2879 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2880 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2881 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2882 } 2883 if (hasAnyConsumedArgs()) 2884 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2885 return EPI; 2886 } 2887 2888 /// \brief Get the kind of exception specification on this function. 2889 ExceptionSpecificationType getExceptionSpecType() const { 2890 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2891 } 2892 /// \brief Return whether this function has any kind of exception spec. 2893 bool hasExceptionSpec() const { 2894 return getExceptionSpecType() != EST_None; 2895 } 2896 /// \brief Return whether this function has a dynamic (throw) exception spec. 2897 bool hasDynamicExceptionSpec() const { 2898 return isDynamicExceptionSpec(getExceptionSpecType()); 2899 } 2900 /// \brief Return whether this function has a noexcept exception spec. 2901 bool hasNoexceptExceptionSpec() const { 2902 return isNoexceptExceptionSpec(getExceptionSpecType()); 2903 } 2904 /// \brief Result type of getNoexceptSpec(). 2905 enum NoexceptResult { 2906 NR_NoNoexcept, ///< There is no noexcept specifier. 2907 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2908 NR_Dependent, ///< The noexcept specifier is dependent. 2909 NR_Throw, ///< The noexcept specifier evaluates to false. 2910 NR_Nothrow ///< The noexcept specifier evaluates to true. 2911 }; 2912 /// \brief Get the meaning of the noexcept spec on this function, if any. 2913 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2914 unsigned getNumExceptions() const { return NumExceptions; } 2915 QualType getExceptionType(unsigned i) const { 2916 assert(i < NumExceptions && "Invalid exception number!"); 2917 return exception_begin()[i]; 2918 } 2919 Expr *getNoexceptExpr() const { 2920 if (getExceptionSpecType() != EST_ComputedNoexcept) 2921 return 0; 2922 // NoexceptExpr sits where the arguments end. 2923 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2924 } 2925 /// \brief If this function type has an exception specification which hasn't 2926 /// been determined yet (either because it has not been evaluated or because 2927 /// it has not been instantiated), this is the function whose exception 2928 /// specification is represented by this type. 2929 FunctionDecl *getExceptionSpecDecl() const { 2930 if (getExceptionSpecType() != EST_Uninstantiated && 2931 getExceptionSpecType() != EST_Unevaluated) 2932 return 0; 2933 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2934 } 2935 /// \brief If this function type has an uninstantiated exception 2936 /// specification, this is the function whose exception specification 2937 /// should be instantiated to find the exception specification for 2938 /// this type. 2939 FunctionDecl *getExceptionSpecTemplate() const { 2940 if (getExceptionSpecType() != EST_Uninstantiated) 2941 return 0; 2942 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2943 } 2944 bool isNothrow(ASTContext &Ctx) const { 2945 ExceptionSpecificationType EST = getExceptionSpecType(); 2946 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2947 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2948 return true; 2949 if (EST != EST_ComputedNoexcept) 2950 return false; 2951 return getNoexceptSpec(Ctx) == NR_Nothrow; 2952 } 2953 2954 bool isVariadic() const { return Variadic; } 2955 2956 /// \brief Determines whether this function prototype contains a 2957 /// parameter pack at the end. 2958 /// 2959 /// A function template whose last parameter is a parameter pack can be 2960 /// called with an arbitrary number of arguments, much like a variadic 2961 /// function. 2962 bool isTemplateVariadic() const; 2963 2964 bool hasTrailingReturn() const { return HasTrailingReturn; } 2965 2966 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2967 2968 2969 /// \brief Retrieve the ref-qualifier associated with this function type. 2970 RefQualifierKind getRefQualifier() const { 2971 return FunctionType::getRefQualifier(); 2972 } 2973 2974 typedef const QualType *arg_type_iterator; 2975 arg_type_iterator arg_type_begin() const { 2976 return reinterpret_cast<const QualType *>(this+1); 2977 } 2978 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2979 2980 typedef const QualType *exception_iterator; 2981 exception_iterator exception_begin() const { 2982 // exceptions begin where arguments end 2983 return arg_type_end(); 2984 } 2985 exception_iterator exception_end() const { 2986 if (getExceptionSpecType() != EST_Dynamic) 2987 return exception_begin(); 2988 return exception_begin() + NumExceptions; 2989 } 2990 2991 bool hasAnyConsumedArgs() const { 2992 return HasAnyConsumedArgs; 2993 } 2994 bool isArgConsumed(unsigned I) const { 2995 assert(I < getNumArgs() && "argument index out of range!"); 2996 if (hasAnyConsumedArgs()) 2997 return getConsumedArgsBuffer()[I]; 2998 return false; 2999 } 3000 3001 bool isSugared() const { return false; } 3002 QualType desugar() const { return QualType(this, 0); } 3003 3004 // FIXME: Remove the string version. 3005 void printExceptionSpecification(std::string &S, 3006 const PrintingPolicy &Policy) const; 3007 void printExceptionSpecification(raw_ostream &OS, 3008 const PrintingPolicy &Policy) const; 3009 3010 static bool classof(const Type *T) { 3011 return T->getTypeClass() == FunctionProto; 3012 } 3013 3014 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3015 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3016 arg_type_iterator ArgTys, unsigned NumArgs, 3017 const ExtProtoInfo &EPI, const ASTContext &Context); 3018}; 3019 3020 3021/// \brief Represents the dependent type named by a dependently-scoped 3022/// typename using declaration, e.g. 3023/// using typename Base<T>::foo; 3024/// Template instantiation turns these into the underlying type. 3025class UnresolvedUsingType : public Type { 3026 UnresolvedUsingTypenameDecl *Decl; 3027 3028 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3029 : Type(UnresolvedUsing, QualType(), true, true, false, 3030 /*ContainsUnexpandedParameterPack=*/false), 3031 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3032 friend class ASTContext; // ASTContext creates these. 3033public: 3034 3035 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3036 3037 bool isSugared() const { return false; } 3038 QualType desugar() const { return QualType(this, 0); } 3039 3040 static bool classof(const Type *T) { 3041 return T->getTypeClass() == UnresolvedUsing; 3042 } 3043 3044 void Profile(llvm::FoldingSetNodeID &ID) { 3045 return Profile(ID, Decl); 3046 } 3047 static void Profile(llvm::FoldingSetNodeID &ID, 3048 UnresolvedUsingTypenameDecl *D) { 3049 ID.AddPointer(D); 3050 } 3051}; 3052 3053 3054class TypedefType : public Type { 3055 TypedefNameDecl *Decl; 3056protected: 3057 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3058 : Type(tc, can, can->isDependentType(), 3059 can->isInstantiationDependentType(), 3060 can->isVariablyModifiedType(), 3061 /*ContainsUnexpandedParameterPack=*/false), 3062 Decl(const_cast<TypedefNameDecl*>(D)) { 3063 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3064 } 3065 friend class ASTContext; // ASTContext creates these. 3066public: 3067 3068 TypedefNameDecl *getDecl() const { return Decl; } 3069 3070 bool isSugared() const { return true; } 3071 QualType desugar() const; 3072 3073 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3074}; 3075 3076/// TypeOfExprType (GCC extension). 3077class TypeOfExprType : public Type { 3078 Expr *TOExpr; 3079 3080protected: 3081 TypeOfExprType(Expr *E, QualType can = QualType()); 3082 friend class ASTContext; // ASTContext creates these. 3083public: 3084 Expr *getUnderlyingExpr() const { return TOExpr; } 3085 3086 /// \brief Remove a single level of sugar. 3087 QualType desugar() const; 3088 3089 /// \brief Returns whether this type directly provides sugar. 3090 bool isSugared() const; 3091 3092 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3093}; 3094 3095/// \brief Internal representation of canonical, dependent 3096/// typeof(expr) types. 3097/// 3098/// This class is used internally by the ASTContext to manage 3099/// canonical, dependent types, only. Clients will only see instances 3100/// of this class via TypeOfExprType nodes. 3101class DependentTypeOfExprType 3102 : public TypeOfExprType, public llvm::FoldingSetNode { 3103 const ASTContext &Context; 3104 3105public: 3106 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3107 : TypeOfExprType(E), Context(Context) { } 3108 3109 void Profile(llvm::FoldingSetNodeID &ID) { 3110 Profile(ID, Context, getUnderlyingExpr()); 3111 } 3112 3113 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3114 Expr *E); 3115}; 3116 3117/// TypeOfType (GCC extension). 3118class TypeOfType : public Type { 3119 QualType TOType; 3120 TypeOfType(QualType T, QualType can) 3121 : Type(TypeOf, can, T->isDependentType(), 3122 T->isInstantiationDependentType(), 3123 T->isVariablyModifiedType(), 3124 T->containsUnexpandedParameterPack()), 3125 TOType(T) { 3126 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3127 } 3128 friend class ASTContext; // ASTContext creates these. 3129public: 3130 QualType getUnderlyingType() const { return TOType; } 3131 3132 /// \brief Remove a single level of sugar. 3133 QualType desugar() const { return getUnderlyingType(); } 3134 3135 /// \brief Returns whether this type directly provides sugar. 3136 bool isSugared() const { return true; } 3137 3138 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3139}; 3140 3141/// DecltypeType (C++0x) 3142class DecltypeType : public Type { 3143 Expr *E; 3144 QualType UnderlyingType; 3145 3146protected: 3147 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3148 friend class ASTContext; // ASTContext creates these. 3149public: 3150 Expr *getUnderlyingExpr() const { return E; } 3151 QualType getUnderlyingType() const { return UnderlyingType; } 3152 3153 /// \brief Remove a single level of sugar. 3154 QualType desugar() const; 3155 3156 /// \brief Returns whether this type directly provides sugar. 3157 bool isSugared() const; 3158 3159 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3160}; 3161 3162/// \brief Internal representation of canonical, dependent 3163/// decltype(expr) types. 3164/// 3165/// This class is used internally by the ASTContext to manage 3166/// canonical, dependent types, only. Clients will only see instances 3167/// of this class via DecltypeType nodes. 3168class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3169 const ASTContext &Context; 3170 3171public: 3172 DependentDecltypeType(const ASTContext &Context, Expr *E); 3173 3174 void Profile(llvm::FoldingSetNodeID &ID) { 3175 Profile(ID, Context, getUnderlyingExpr()); 3176 } 3177 3178 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3179 Expr *E); 3180}; 3181 3182/// \brief A unary type transform, which is a type constructed from another 3183class UnaryTransformType : public Type { 3184public: 3185 enum UTTKind { 3186 EnumUnderlyingType 3187 }; 3188 3189private: 3190 /// The untransformed type. 3191 QualType BaseType; 3192 /// The transformed type if not dependent, otherwise the same as BaseType. 3193 QualType UnderlyingType; 3194 3195 UTTKind UKind; 3196protected: 3197 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3198 QualType CanonicalTy); 3199 friend class ASTContext; 3200public: 3201 bool isSugared() const { return !isDependentType(); } 3202 QualType desugar() const { return UnderlyingType; } 3203 3204 QualType getUnderlyingType() const { return UnderlyingType; } 3205 QualType getBaseType() const { return BaseType; } 3206 3207 UTTKind getUTTKind() const { return UKind; } 3208 3209 static bool classof(const Type *T) { 3210 return T->getTypeClass() == UnaryTransform; 3211 } 3212}; 3213 3214class TagType : public Type { 3215 /// Stores the TagDecl associated with this type. The decl may point to any 3216 /// TagDecl that declares the entity. 3217 TagDecl * decl; 3218 3219 friend class ASTReader; 3220 3221protected: 3222 TagType(TypeClass TC, const TagDecl *D, QualType can); 3223 3224public: 3225 TagDecl *getDecl() const; 3226 3227 /// @brief Determines whether this type is in the process of being 3228 /// defined. 3229 bool isBeingDefined() const; 3230 3231 static bool classof(const Type *T) { 3232 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3233 } 3234}; 3235 3236/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3237/// to detect TagType objects of structs/unions/classes. 3238class RecordType : public TagType { 3239protected: 3240 explicit RecordType(const RecordDecl *D) 3241 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3242 explicit RecordType(TypeClass TC, RecordDecl *D) 3243 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3244 friend class ASTContext; // ASTContext creates these. 3245public: 3246 3247 RecordDecl *getDecl() const { 3248 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3249 } 3250 3251 // FIXME: This predicate is a helper to QualType/Type. It needs to 3252 // recursively check all fields for const-ness. If any field is declared 3253 // const, it needs to return false. 3254 bool hasConstFields() const { return false; } 3255 3256 bool isSugared() const { return false; } 3257 QualType desugar() const { return QualType(this, 0); } 3258 3259 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3260}; 3261 3262/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3263/// to detect TagType objects of enums. 3264class EnumType : public TagType { 3265 explicit EnumType(const EnumDecl *D) 3266 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3267 friend class ASTContext; // ASTContext creates these. 3268public: 3269 3270 EnumDecl *getDecl() const { 3271 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3272 } 3273 3274 bool isSugared() const { return false; } 3275 QualType desugar() const { return QualType(this, 0); } 3276 3277 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3278}; 3279 3280/// AttributedType - An attributed type is a type to which a type 3281/// attribute has been applied. The "modified type" is the 3282/// fully-sugared type to which the attributed type was applied; 3283/// generally it is not canonically equivalent to the attributed type. 3284/// The "equivalent type" is the minimally-desugared type which the 3285/// type is canonically equivalent to. 3286/// 3287/// For example, in the following attributed type: 3288/// int32_t __attribute__((vector_size(16))) 3289/// - the modified type is the TypedefType for int32_t 3290/// - the equivalent type is VectorType(16, int32_t) 3291/// - the canonical type is VectorType(16, int) 3292class AttributedType : public Type, public llvm::FoldingSetNode { 3293public: 3294 // It is really silly to have yet another attribute-kind enum, but 3295 // clang::attr::Kind doesn't currently cover the pure type attrs. 3296 enum Kind { 3297 // Expression operand. 3298 attr_address_space, 3299 attr_regparm, 3300 attr_vector_size, 3301 attr_neon_vector_type, 3302 attr_neon_polyvector_type, 3303 3304 FirstExprOperandKind = attr_address_space, 3305 LastExprOperandKind = attr_neon_polyvector_type, 3306 3307 // Enumerated operand (string or keyword). 3308 attr_objc_gc, 3309 attr_objc_ownership, 3310 attr_pcs, 3311 3312 FirstEnumOperandKind = attr_objc_gc, 3313 LastEnumOperandKind = attr_pcs, 3314 3315 // No operand. 3316 attr_noreturn, 3317 attr_cdecl, 3318 attr_fastcall, 3319 attr_stdcall, 3320 attr_thiscall, 3321 attr_pascal, 3322 attr_pnaclcall 3323 }; 3324 3325private: 3326 QualType ModifiedType; 3327 QualType EquivalentType; 3328 3329 friend class ASTContext; // creates these 3330 3331 AttributedType(QualType canon, Kind attrKind, 3332 QualType modified, QualType equivalent) 3333 : Type(Attributed, canon, canon->isDependentType(), 3334 canon->isInstantiationDependentType(), 3335 canon->isVariablyModifiedType(), 3336 canon->containsUnexpandedParameterPack()), 3337 ModifiedType(modified), EquivalentType(equivalent) { 3338 AttributedTypeBits.AttrKind = attrKind; 3339 } 3340 3341public: 3342 Kind getAttrKind() const { 3343 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3344 } 3345 3346 QualType getModifiedType() const { return ModifiedType; } 3347 QualType getEquivalentType() const { return EquivalentType; } 3348 3349 bool isSugared() const { return true; } 3350 QualType desugar() const { return getEquivalentType(); } 3351 3352 void Profile(llvm::FoldingSetNodeID &ID) { 3353 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3354 } 3355 3356 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3357 QualType modified, QualType equivalent) { 3358 ID.AddInteger(attrKind); 3359 ID.AddPointer(modified.getAsOpaquePtr()); 3360 ID.AddPointer(equivalent.getAsOpaquePtr()); 3361 } 3362 3363 static bool classof(const Type *T) { 3364 return T->getTypeClass() == Attributed; 3365 } 3366}; 3367 3368class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3369 // Helper data collector for canonical types. 3370 struct CanonicalTTPTInfo { 3371 unsigned Depth : 15; 3372 unsigned ParameterPack : 1; 3373 unsigned Index : 16; 3374 }; 3375 3376 union { 3377 // Info for the canonical type. 3378 CanonicalTTPTInfo CanTTPTInfo; 3379 // Info for the non-canonical type. 3380 TemplateTypeParmDecl *TTPDecl; 3381 }; 3382 3383 /// Build a non-canonical type. 3384 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3385 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3386 /*InstantiationDependent=*/true, 3387 /*VariablyModified=*/false, 3388 Canon->containsUnexpandedParameterPack()), 3389 TTPDecl(TTPDecl) { } 3390 3391 /// Build the canonical type. 3392 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3393 : Type(TemplateTypeParm, QualType(this, 0), 3394 /*Dependent=*/true, 3395 /*InstantiationDependent=*/true, 3396 /*VariablyModified=*/false, PP) { 3397 CanTTPTInfo.Depth = D; 3398 CanTTPTInfo.Index = I; 3399 CanTTPTInfo.ParameterPack = PP; 3400 } 3401 3402 friend class ASTContext; // ASTContext creates these 3403 3404 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3405 QualType Can = getCanonicalTypeInternal(); 3406 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3407 } 3408 3409public: 3410 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3411 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3412 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3413 3414 TemplateTypeParmDecl *getDecl() const { 3415 return isCanonicalUnqualified() ? 0 : TTPDecl; 3416 } 3417 3418 IdentifierInfo *getIdentifier() const; 3419 3420 bool isSugared() const { return false; } 3421 QualType desugar() const { return QualType(this, 0); } 3422 3423 void Profile(llvm::FoldingSetNodeID &ID) { 3424 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3425 } 3426 3427 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3428 unsigned Index, bool ParameterPack, 3429 TemplateTypeParmDecl *TTPDecl) { 3430 ID.AddInteger(Depth); 3431 ID.AddInteger(Index); 3432 ID.AddBoolean(ParameterPack); 3433 ID.AddPointer(TTPDecl); 3434 } 3435 3436 static bool classof(const Type *T) { 3437 return T->getTypeClass() == TemplateTypeParm; 3438 } 3439}; 3440 3441/// \brief Represents the result of substituting a type for a template 3442/// type parameter. 3443/// 3444/// Within an instantiated template, all template type parameters have 3445/// been replaced with these. They are used solely to record that a 3446/// type was originally written as a template type parameter; 3447/// therefore they are never canonical. 3448class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3449 // The original type parameter. 3450 const TemplateTypeParmType *Replaced; 3451 3452 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3453 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3454 Canon->isInstantiationDependentType(), 3455 Canon->isVariablyModifiedType(), 3456 Canon->containsUnexpandedParameterPack()), 3457 Replaced(Param) { } 3458 3459 friend class ASTContext; 3460 3461public: 3462 /// Gets the template parameter that was substituted for. 3463 const TemplateTypeParmType *getReplacedParameter() const { 3464 return Replaced; 3465 } 3466 3467 /// Gets the type that was substituted for the template 3468 /// parameter. 3469 QualType getReplacementType() const { 3470 return getCanonicalTypeInternal(); 3471 } 3472 3473 bool isSugared() const { return true; } 3474 QualType desugar() const { return getReplacementType(); } 3475 3476 void Profile(llvm::FoldingSetNodeID &ID) { 3477 Profile(ID, getReplacedParameter(), getReplacementType()); 3478 } 3479 static void Profile(llvm::FoldingSetNodeID &ID, 3480 const TemplateTypeParmType *Replaced, 3481 QualType Replacement) { 3482 ID.AddPointer(Replaced); 3483 ID.AddPointer(Replacement.getAsOpaquePtr()); 3484 } 3485 3486 static bool classof(const Type *T) { 3487 return T->getTypeClass() == SubstTemplateTypeParm; 3488 } 3489}; 3490 3491/// \brief Represents the result of substituting a set of types for a template 3492/// type parameter pack. 3493/// 3494/// When a pack expansion in the source code contains multiple parameter packs 3495/// and those parameter packs correspond to different levels of template 3496/// parameter lists, this type node is used to represent a template type 3497/// parameter pack from an outer level, which has already had its argument pack 3498/// substituted but that still lives within a pack expansion that itself 3499/// could not be instantiated. When actually performing a substitution into 3500/// that pack expansion (e.g., when all template parameters have corresponding 3501/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3502/// at the current pack substitution index. 3503class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3504 /// \brief The original type parameter. 3505 const TemplateTypeParmType *Replaced; 3506 3507 /// \brief A pointer to the set of template arguments that this 3508 /// parameter pack is instantiated with. 3509 const TemplateArgument *Arguments; 3510 3511 /// \brief The number of template arguments in \c Arguments. 3512 unsigned NumArguments; 3513 3514 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3515 QualType Canon, 3516 const TemplateArgument &ArgPack); 3517 3518 friend class ASTContext; 3519 3520public: 3521 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3522 3523 /// Gets the template parameter that was substituted for. 3524 const TemplateTypeParmType *getReplacedParameter() const { 3525 return Replaced; 3526 } 3527 3528 bool isSugared() const { return false; } 3529 QualType desugar() const { return QualType(this, 0); } 3530 3531 TemplateArgument getArgumentPack() const; 3532 3533 void Profile(llvm::FoldingSetNodeID &ID); 3534 static void Profile(llvm::FoldingSetNodeID &ID, 3535 const TemplateTypeParmType *Replaced, 3536 const TemplateArgument &ArgPack); 3537 3538 static bool classof(const Type *T) { 3539 return T->getTypeClass() == SubstTemplateTypeParmPack; 3540 } 3541}; 3542 3543/// \brief Represents a C++0x auto type. 3544/// 3545/// These types are usually a placeholder for a deduced type. However, within 3546/// templates and before the initializer is attached, there is no deduced type 3547/// and an auto type is type-dependent and canonical. 3548class AutoType : public Type, public llvm::FoldingSetNode { 3549 AutoType(QualType DeducedType) 3550 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3551 /*Dependent=*/DeducedType.isNull(), 3552 /*InstantiationDependent=*/DeducedType.isNull(), 3553 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3554 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3555 "deduced a dependent type for auto"); 3556 } 3557 3558 friend class ASTContext; // ASTContext creates these 3559 3560public: 3561 bool isSugared() const { return isDeduced(); } 3562 QualType desugar() const { return getCanonicalTypeInternal(); } 3563 3564 QualType getDeducedType() const { 3565 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3566 } 3567 bool isDeduced() const { 3568 return !isDependentType(); 3569 } 3570 3571 void Profile(llvm::FoldingSetNodeID &ID) { 3572 Profile(ID, getDeducedType()); 3573 } 3574 3575 static void Profile(llvm::FoldingSetNodeID &ID, 3576 QualType Deduced) { 3577 ID.AddPointer(Deduced.getAsOpaquePtr()); 3578 } 3579 3580 static bool classof(const Type *T) { 3581 return T->getTypeClass() == Auto; 3582 } 3583}; 3584 3585/// \brief Represents a type template specialization; the template 3586/// must be a class template, a type alias template, or a template 3587/// template parameter. A template which cannot be resolved to one of 3588/// these, e.g. because it is written with a dependent scope 3589/// specifier, is instead represented as a 3590/// @c DependentTemplateSpecializationType. 3591/// 3592/// A non-dependent template specialization type is always "sugar", 3593/// typically for a @c RecordType. For example, a class template 3594/// specialization type of @c vector<int> will refer to a tag type for 3595/// the instantiation @c std::vector<int, std::allocator<int>> 3596/// 3597/// Template specializations are dependent if either the template or 3598/// any of the template arguments are dependent, in which case the 3599/// type may also be canonical. 3600/// 3601/// Instances of this type are allocated with a trailing array of 3602/// TemplateArguments, followed by a QualType representing the 3603/// non-canonical aliased type when the template is a type alias 3604/// template. 3605class TemplateSpecializationType 3606 : public Type, public llvm::FoldingSetNode { 3607 /// \brief The name of the template being specialized. This is 3608 /// either a TemplateName::Template (in which case it is a 3609 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3610 /// TypeAliasTemplateDecl*), a 3611 /// TemplateName::SubstTemplateTemplateParmPack, or a 3612 /// TemplateName::SubstTemplateTemplateParm (in which case the 3613 /// replacement must, recursively, be one of these). 3614 TemplateName Template; 3615 3616 /// \brief - The number of template arguments named in this class 3617 /// template specialization. 3618 unsigned NumArgs : 31; 3619 3620 /// \brief Whether this template specialization type is a substituted 3621 /// type alias. 3622 bool TypeAlias : 1; 3623 3624 TemplateSpecializationType(TemplateName T, 3625 const TemplateArgument *Args, 3626 unsigned NumArgs, QualType Canon, 3627 QualType Aliased); 3628 3629 friend class ASTContext; // ASTContext creates these 3630 3631public: 3632 /// \brief Determine whether any of the given template arguments are 3633 /// dependent. 3634 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3635 unsigned NumArgs, 3636 bool &InstantiationDependent); 3637 3638 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3639 unsigned NumArgs, 3640 bool &InstantiationDependent); 3641 3642 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3643 bool &InstantiationDependent); 3644 3645 /// \brief Print a template argument list, including the '<' and '>' 3646 /// enclosing the template arguments. 3647 // FIXME: remove the string ones. 3648 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3649 unsigned NumArgs, 3650 const PrintingPolicy &Policy, 3651 bool SkipBrackets = false); 3652 3653 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3654 unsigned NumArgs, 3655 const PrintingPolicy &Policy); 3656 3657 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3658 const PrintingPolicy &Policy); 3659 3660 /// \brief Print a template argument list, including the '<' and '>' 3661 /// enclosing the template arguments. 3662 static void PrintTemplateArgumentList(raw_ostream &OS, 3663 const TemplateArgument *Args, 3664 unsigned NumArgs, 3665 const PrintingPolicy &Policy, 3666 bool SkipBrackets = false); 3667 3668 static void PrintTemplateArgumentList(raw_ostream &OS, 3669 const TemplateArgumentLoc *Args, 3670 unsigned NumArgs, 3671 const PrintingPolicy &Policy); 3672 3673 static void PrintTemplateArgumentList(raw_ostream &OS, 3674 const TemplateArgumentListInfo &, 3675 const PrintingPolicy &Policy); 3676 3677 /// True if this template specialization type matches a current 3678 /// instantiation in the context in which it is found. 3679 bool isCurrentInstantiation() const { 3680 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3681 } 3682 3683 /// \brief Determine if this template specialization type is for a type alias 3684 /// template that has been substituted. 3685 /// 3686 /// Nearly every template specialization type whose template is an alias 3687 /// template will be substituted. However, this is not the case when 3688 /// the specialization contains a pack expansion but the template alias 3689 /// does not have a corresponding parameter pack, e.g., 3690 /// 3691 /// \code 3692 /// template<typename T, typename U, typename V> struct S; 3693 /// template<typename T, typename U> using A = S<T, int, U>; 3694 /// template<typename... Ts> struct X { 3695 /// typedef A<Ts...> type; // not a type alias 3696 /// }; 3697 /// \endcode 3698 bool isTypeAlias() const { return TypeAlias; } 3699 3700 /// Get the aliased type, if this is a specialization of a type alias 3701 /// template. 3702 QualType getAliasedType() const { 3703 assert(isTypeAlias() && "not a type alias template specialization"); 3704 return *reinterpret_cast<const QualType*>(end()); 3705 } 3706 3707 typedef const TemplateArgument * iterator; 3708 3709 iterator begin() const { return getArgs(); } 3710 iterator end() const; // defined inline in TemplateBase.h 3711 3712 /// \brief Retrieve the name of the template that we are specializing. 3713 TemplateName getTemplateName() const { return Template; } 3714 3715 /// \brief Retrieve the template arguments. 3716 const TemplateArgument *getArgs() const { 3717 return reinterpret_cast<const TemplateArgument *>(this + 1); 3718 } 3719 3720 /// \brief Retrieve the number of template arguments. 3721 unsigned getNumArgs() const { return NumArgs; } 3722 3723 /// \brief Retrieve a specific template argument as a type. 3724 /// \pre @c isArgType(Arg) 3725 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3726 3727 bool isSugared() const { 3728 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3729 } 3730 QualType desugar() const { return getCanonicalTypeInternal(); } 3731 3732 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3733 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3734 if (isTypeAlias()) 3735 getAliasedType().Profile(ID); 3736 } 3737 3738 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3739 const TemplateArgument *Args, 3740 unsigned NumArgs, 3741 const ASTContext &Context); 3742 3743 static bool classof(const Type *T) { 3744 return T->getTypeClass() == TemplateSpecialization; 3745 } 3746}; 3747 3748/// \brief The injected class name of a C++ class template or class 3749/// template partial specialization. Used to record that a type was 3750/// spelled with a bare identifier rather than as a template-id; the 3751/// equivalent for non-templated classes is just RecordType. 3752/// 3753/// Injected class name types are always dependent. Template 3754/// instantiation turns these into RecordTypes. 3755/// 3756/// Injected class name types are always canonical. This works 3757/// because it is impossible to compare an injected class name type 3758/// with the corresponding non-injected template type, for the same 3759/// reason that it is impossible to directly compare template 3760/// parameters from different dependent contexts: injected class name 3761/// types can only occur within the scope of a particular templated 3762/// declaration, and within that scope every template specialization 3763/// will canonicalize to the injected class name (when appropriate 3764/// according to the rules of the language). 3765class InjectedClassNameType : public Type { 3766 CXXRecordDecl *Decl; 3767 3768 /// The template specialization which this type represents. 3769 /// For example, in 3770 /// template <class T> class A { ... }; 3771 /// this is A<T>, whereas in 3772 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3773 /// this is A<B<X,Y> >. 3774 /// 3775 /// It is always unqualified, always a template specialization type, 3776 /// and always dependent. 3777 QualType InjectedType; 3778 3779 friend class ASTContext; // ASTContext creates these. 3780 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3781 // currently suitable for AST reading, too much 3782 // interdependencies. 3783 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3784 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3785 /*InstantiationDependent=*/true, 3786 /*VariablyModified=*/false, 3787 /*ContainsUnexpandedParameterPack=*/false), 3788 Decl(D), InjectedType(TST) { 3789 assert(isa<TemplateSpecializationType>(TST)); 3790 assert(!TST.hasQualifiers()); 3791 assert(TST->isDependentType()); 3792 } 3793 3794public: 3795 QualType getInjectedSpecializationType() const { return InjectedType; } 3796 const TemplateSpecializationType *getInjectedTST() const { 3797 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3798 } 3799 3800 CXXRecordDecl *getDecl() const; 3801 3802 bool isSugared() const { return false; } 3803 QualType desugar() const { return QualType(this, 0); } 3804 3805 static bool classof(const Type *T) { 3806 return T->getTypeClass() == InjectedClassName; 3807 } 3808}; 3809 3810/// \brief The kind of a tag type. 3811enum TagTypeKind { 3812 /// \brief The "struct" keyword. 3813 TTK_Struct, 3814 /// \brief The "__interface" keyword. 3815 TTK_Interface, 3816 /// \brief The "union" keyword. 3817 TTK_Union, 3818 /// \brief The "class" keyword. 3819 TTK_Class, 3820 /// \brief The "enum" keyword. 3821 TTK_Enum 3822}; 3823 3824/// \brief The elaboration keyword that precedes a qualified type name or 3825/// introduces an elaborated-type-specifier. 3826enum ElaboratedTypeKeyword { 3827 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3828 ETK_Struct, 3829 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3830 ETK_Interface, 3831 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3832 ETK_Union, 3833 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3834 ETK_Class, 3835 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3836 ETK_Enum, 3837 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3838 /// \c typename T::type. 3839 ETK_Typename, 3840 /// \brief No keyword precedes the qualified type name. 3841 ETK_None 3842}; 3843 3844/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3845/// The keyword in stored in the free bits of the base class. 3846/// Also provides a few static helpers for converting and printing 3847/// elaborated type keyword and tag type kind enumerations. 3848class TypeWithKeyword : public Type { 3849protected: 3850 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3851 QualType Canonical, bool Dependent, 3852 bool InstantiationDependent, bool VariablyModified, 3853 bool ContainsUnexpandedParameterPack) 3854 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3855 ContainsUnexpandedParameterPack) { 3856 TypeWithKeywordBits.Keyword = Keyword; 3857 } 3858 3859public: 3860 ElaboratedTypeKeyword getKeyword() const { 3861 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3862 } 3863 3864 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3865 /// into an elaborated type keyword. 3866 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3867 3868 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3869 /// into a tag type kind. It is an error to provide a type specifier 3870 /// which *isn't* a tag kind here. 3871 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3872 3873 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3874 /// elaborated type keyword. 3875 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3876 3877 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3878 // a TagTypeKind. It is an error to provide an elaborated type keyword 3879 /// which *isn't* a tag kind here. 3880 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3881 3882 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3883 3884 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3885 3886 static const char *getTagTypeKindName(TagTypeKind Kind) { 3887 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3888 } 3889 3890 class CannotCastToThisType {}; 3891 static CannotCastToThisType classof(const Type *); 3892}; 3893 3894/// \brief Represents a type that was referred to using an elaborated type 3895/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3896/// or both. 3897/// 3898/// This type is used to keep track of a type name as written in the 3899/// source code, including tag keywords and any nested-name-specifiers. 3900/// The type itself is always "sugar", used to express what was written 3901/// in the source code but containing no additional semantic information. 3902class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3903 3904 /// \brief The nested name specifier containing the qualifier. 3905 NestedNameSpecifier *NNS; 3906 3907 /// \brief The type that this qualified name refers to. 3908 QualType NamedType; 3909 3910 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3911 QualType NamedType, QualType CanonType) 3912 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3913 NamedType->isDependentType(), 3914 NamedType->isInstantiationDependentType(), 3915 NamedType->isVariablyModifiedType(), 3916 NamedType->containsUnexpandedParameterPack()), 3917 NNS(NNS), NamedType(NamedType) { 3918 assert(!(Keyword == ETK_None && NNS == 0) && 3919 "ElaboratedType cannot have elaborated type keyword " 3920 "and name qualifier both null."); 3921 } 3922 3923 friend class ASTContext; // ASTContext creates these 3924 3925public: 3926 ~ElaboratedType(); 3927 3928 /// \brief Retrieve the qualification on this type. 3929 NestedNameSpecifier *getQualifier() const { return NNS; } 3930 3931 /// \brief Retrieve the type named by the qualified-id. 3932 QualType getNamedType() const { return NamedType; } 3933 3934 /// \brief Remove a single level of sugar. 3935 QualType desugar() const { return getNamedType(); } 3936 3937 /// \brief Returns whether this type directly provides sugar. 3938 bool isSugared() const { return true; } 3939 3940 void Profile(llvm::FoldingSetNodeID &ID) { 3941 Profile(ID, getKeyword(), NNS, NamedType); 3942 } 3943 3944 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3945 NestedNameSpecifier *NNS, QualType NamedType) { 3946 ID.AddInteger(Keyword); 3947 ID.AddPointer(NNS); 3948 NamedType.Profile(ID); 3949 } 3950 3951 static bool classof(const Type *T) { 3952 return T->getTypeClass() == Elaborated; 3953 } 3954}; 3955 3956/// \brief Represents a qualified type name for which the type name is 3957/// dependent. 3958/// 3959/// DependentNameType represents a class of dependent types that involve a 3960/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3961/// name of a type. The DependentNameType may start with a "typename" (for a 3962/// typename-specifier), "class", "struct", "union", or "enum" (for a 3963/// dependent elaborated-type-specifier), or nothing (in contexts where we 3964/// know that we must be referring to a type, e.g., in a base class specifier). 3965class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3966 3967 /// \brief The nested name specifier containing the qualifier. 3968 NestedNameSpecifier *NNS; 3969 3970 /// \brief The type that this typename specifier refers to. 3971 const IdentifierInfo *Name; 3972 3973 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3974 const IdentifierInfo *Name, QualType CanonType) 3975 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3976 /*InstantiationDependent=*/true, 3977 /*VariablyModified=*/false, 3978 NNS->containsUnexpandedParameterPack()), 3979 NNS(NNS), Name(Name) { 3980 assert(NNS->isDependent() && 3981 "DependentNameType requires a dependent nested-name-specifier"); 3982 } 3983 3984 friend class ASTContext; // ASTContext creates these 3985 3986public: 3987 /// \brief Retrieve the qualification on this type. 3988 NestedNameSpecifier *getQualifier() const { return NNS; } 3989 3990 /// \brief Retrieve the type named by the typename specifier as an 3991 /// identifier. 3992 /// 3993 /// This routine will return a non-NULL identifier pointer when the 3994 /// form of the original typename was terminated by an identifier, 3995 /// e.g., "typename T::type". 3996 const IdentifierInfo *getIdentifier() const { 3997 return Name; 3998 } 3999 4000 bool isSugared() const { return false; } 4001 QualType desugar() const { return QualType(this, 0); } 4002 4003 void Profile(llvm::FoldingSetNodeID &ID) { 4004 Profile(ID, getKeyword(), NNS, Name); 4005 } 4006 4007 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4008 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4009 ID.AddInteger(Keyword); 4010 ID.AddPointer(NNS); 4011 ID.AddPointer(Name); 4012 } 4013 4014 static bool classof(const Type *T) { 4015 return T->getTypeClass() == DependentName; 4016 } 4017}; 4018 4019/// DependentTemplateSpecializationType - Represents a template 4020/// specialization type whose template cannot be resolved, e.g. 4021/// A<T>::template B<T> 4022class DependentTemplateSpecializationType : 4023 public TypeWithKeyword, public llvm::FoldingSetNode { 4024 4025 /// \brief The nested name specifier containing the qualifier. 4026 NestedNameSpecifier *NNS; 4027 4028 /// \brief The identifier of the template. 4029 const IdentifierInfo *Name; 4030 4031 /// \brief - The number of template arguments named in this class 4032 /// template specialization. 4033 unsigned NumArgs; 4034 4035 const TemplateArgument *getArgBuffer() const { 4036 return reinterpret_cast<const TemplateArgument*>(this+1); 4037 } 4038 TemplateArgument *getArgBuffer() { 4039 return reinterpret_cast<TemplateArgument*>(this+1); 4040 } 4041 4042 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4043 NestedNameSpecifier *NNS, 4044 const IdentifierInfo *Name, 4045 unsigned NumArgs, 4046 const TemplateArgument *Args, 4047 QualType Canon); 4048 4049 friend class ASTContext; // ASTContext creates these 4050 4051public: 4052 NestedNameSpecifier *getQualifier() const { return NNS; } 4053 const IdentifierInfo *getIdentifier() const { return Name; } 4054 4055 /// \brief Retrieve the template arguments. 4056 const TemplateArgument *getArgs() const { 4057 return getArgBuffer(); 4058 } 4059 4060 /// \brief Retrieve the number of template arguments. 4061 unsigned getNumArgs() const { return NumArgs; } 4062 4063 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4064 4065 typedef const TemplateArgument * iterator; 4066 iterator begin() const { return getArgs(); } 4067 iterator end() const; // inline in TemplateBase.h 4068 4069 bool isSugared() const { return false; } 4070 QualType desugar() const { return QualType(this, 0); } 4071 4072 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4073 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4074 } 4075 4076 static void Profile(llvm::FoldingSetNodeID &ID, 4077 const ASTContext &Context, 4078 ElaboratedTypeKeyword Keyword, 4079 NestedNameSpecifier *Qualifier, 4080 const IdentifierInfo *Name, 4081 unsigned NumArgs, 4082 const TemplateArgument *Args); 4083 4084 static bool classof(const Type *T) { 4085 return T->getTypeClass() == DependentTemplateSpecialization; 4086 } 4087}; 4088 4089/// \brief Represents a pack expansion of types. 4090/// 4091/// Pack expansions are part of C++0x variadic templates. A pack 4092/// expansion contains a pattern, which itself contains one or more 4093/// "unexpanded" parameter packs. When instantiated, a pack expansion 4094/// produces a series of types, each instantiated from the pattern of 4095/// the expansion, where the Ith instantiation of the pattern uses the 4096/// Ith arguments bound to each of the unexpanded parameter packs. The 4097/// pack expansion is considered to "expand" these unexpanded 4098/// parameter packs. 4099/// 4100/// \code 4101/// template<typename ...Types> struct tuple; 4102/// 4103/// template<typename ...Types> 4104/// struct tuple_of_references { 4105/// typedef tuple<Types&...> type; 4106/// }; 4107/// \endcode 4108/// 4109/// Here, the pack expansion \c Types&... is represented via a 4110/// PackExpansionType whose pattern is Types&. 4111class PackExpansionType : public Type, public llvm::FoldingSetNode { 4112 /// \brief The pattern of the pack expansion. 4113 QualType Pattern; 4114 4115 /// \brief The number of expansions that this pack expansion will 4116 /// generate when substituted (+1), or indicates that 4117 /// 4118 /// This field will only have a non-zero value when some of the parameter 4119 /// packs that occur within the pattern have been substituted but others have 4120 /// not. 4121 unsigned NumExpansions; 4122 4123 PackExpansionType(QualType Pattern, QualType Canon, 4124 llvm::Optional<unsigned> NumExpansions) 4125 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4126 /*InstantiationDependent=*/true, 4127 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4128 /*ContainsUnexpandedParameterPack=*/false), 4129 Pattern(Pattern), 4130 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4131 4132 friend class ASTContext; // ASTContext creates these 4133 4134public: 4135 /// \brief Retrieve the pattern of this pack expansion, which is the 4136 /// type that will be repeatedly instantiated when instantiating the 4137 /// pack expansion itself. 4138 QualType getPattern() const { return Pattern; } 4139 4140 /// \brief Retrieve the number of expansions that this pack expansion will 4141 /// generate, if known. 4142 llvm::Optional<unsigned> getNumExpansions() const { 4143 if (NumExpansions) 4144 return NumExpansions - 1; 4145 4146 return llvm::Optional<unsigned>(); 4147 } 4148 4149 bool isSugared() const { return false; } 4150 QualType desugar() const { return QualType(this, 0); } 4151 4152 void Profile(llvm::FoldingSetNodeID &ID) { 4153 Profile(ID, getPattern(), getNumExpansions()); 4154 } 4155 4156 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4157 llvm::Optional<unsigned> NumExpansions) { 4158 ID.AddPointer(Pattern.getAsOpaquePtr()); 4159 ID.AddBoolean(NumExpansions); 4160 if (NumExpansions) 4161 ID.AddInteger(*NumExpansions); 4162 } 4163 4164 static bool classof(const Type *T) { 4165 return T->getTypeClass() == PackExpansion; 4166 } 4167}; 4168 4169/// ObjCObjectType - Represents a class type in Objective C. 4170/// Every Objective C type is a combination of a base type and a 4171/// list of protocols. 4172/// 4173/// Given the following declarations: 4174/// \code 4175/// \@class C; 4176/// \@protocol P; 4177/// \endcode 4178/// 4179/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4180/// with base C and no protocols. 4181/// 4182/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4183/// 4184/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4185/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4186/// and no protocols. 4187/// 4188/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4189/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4190/// this should get its own sugar class to better represent the source. 4191class ObjCObjectType : public Type { 4192 // ObjCObjectType.NumProtocols - the number of protocols stored 4193 // after the ObjCObjectPointerType node. 4194 // 4195 // These protocols are those written directly on the type. If 4196 // protocol qualifiers ever become additive, the iterators will need 4197 // to get kindof complicated. 4198 // 4199 // In the canonical object type, these are sorted alphabetically 4200 // and uniqued. 4201 4202 /// Either a BuiltinType or an InterfaceType or sugar for either. 4203 QualType BaseType; 4204 4205 ObjCProtocolDecl * const *getProtocolStorage() const { 4206 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4207 } 4208 4209 ObjCProtocolDecl **getProtocolStorage(); 4210 4211protected: 4212 ObjCObjectType(QualType Canonical, QualType Base, 4213 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4214 4215 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4216 ObjCObjectType(enum Nonce_ObjCInterface) 4217 : Type(ObjCInterface, QualType(), false, false, false, false), 4218 BaseType(QualType(this_(), 0)) { 4219 ObjCObjectTypeBits.NumProtocols = 0; 4220 } 4221 4222public: 4223 /// getBaseType - Gets the base type of this object type. This is 4224 /// always (possibly sugar for) one of: 4225 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4226 /// user, which is a typedef for an ObjCPointerType) 4227 /// - the 'Class' builtin type (same caveat) 4228 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4229 QualType getBaseType() const { return BaseType; } 4230 4231 bool isObjCId() const { 4232 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4233 } 4234 bool isObjCClass() const { 4235 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4236 } 4237 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4238 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4239 bool isObjCUnqualifiedIdOrClass() const { 4240 if (!qual_empty()) return false; 4241 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4242 return T->getKind() == BuiltinType::ObjCId || 4243 T->getKind() == BuiltinType::ObjCClass; 4244 return false; 4245 } 4246 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4247 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4248 4249 /// Gets the interface declaration for this object type, if the base type 4250 /// really is an interface. 4251 ObjCInterfaceDecl *getInterface() const; 4252 4253 typedef ObjCProtocolDecl * const *qual_iterator; 4254 4255 qual_iterator qual_begin() const { return getProtocolStorage(); } 4256 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4257 4258 bool qual_empty() const { return getNumProtocols() == 0; } 4259 4260 /// getNumProtocols - Return the number of qualifying protocols in this 4261 /// interface type, or 0 if there are none. 4262 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4263 4264 /// \brief Fetch a protocol by index. 4265 ObjCProtocolDecl *getProtocol(unsigned I) const { 4266 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4267 return qual_begin()[I]; 4268 } 4269 4270 bool isSugared() const { return false; } 4271 QualType desugar() const { return QualType(this, 0); } 4272 4273 static bool classof(const Type *T) { 4274 return T->getTypeClass() == ObjCObject || 4275 T->getTypeClass() == ObjCInterface; 4276 } 4277}; 4278 4279/// ObjCObjectTypeImpl - A class providing a concrete implementation 4280/// of ObjCObjectType, so as to not increase the footprint of 4281/// ObjCInterfaceType. Code outside of ASTContext and the core type 4282/// system should not reference this type. 4283class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4284 friend class ASTContext; 4285 4286 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4287 // will need to be modified. 4288 4289 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4290 ObjCProtocolDecl * const *Protocols, 4291 unsigned NumProtocols) 4292 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4293 4294public: 4295 void Profile(llvm::FoldingSetNodeID &ID); 4296 static void Profile(llvm::FoldingSetNodeID &ID, 4297 QualType Base, 4298 ObjCProtocolDecl *const *protocols, 4299 unsigned NumProtocols); 4300}; 4301 4302inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4303 return reinterpret_cast<ObjCProtocolDecl**>( 4304 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4305} 4306 4307/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4308/// object oriented design. They basically correspond to C++ classes. There 4309/// are two kinds of interface types, normal interfaces like "NSString" and 4310/// qualified interfaces, which are qualified with a protocol list like 4311/// "NSString<NSCopyable, NSAmazing>". 4312/// 4313/// ObjCInterfaceType guarantees the following properties when considered 4314/// as a subtype of its superclass, ObjCObjectType: 4315/// - There are no protocol qualifiers. To reinforce this, code which 4316/// tries to invoke the protocol methods via an ObjCInterfaceType will 4317/// fail to compile. 4318/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4319/// T->getBaseType() == QualType(T, 0). 4320class ObjCInterfaceType : public ObjCObjectType { 4321 mutable ObjCInterfaceDecl *Decl; 4322 4323 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4324 : ObjCObjectType(Nonce_ObjCInterface), 4325 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4326 friend class ASTContext; // ASTContext creates these. 4327 friend class ASTReader; 4328 friend class ObjCInterfaceDecl; 4329 4330public: 4331 /// getDecl - Get the declaration of this interface. 4332 ObjCInterfaceDecl *getDecl() const { return Decl; } 4333 4334 bool isSugared() const { return false; } 4335 QualType desugar() const { return QualType(this, 0); } 4336 4337 static bool classof(const Type *T) { 4338 return T->getTypeClass() == ObjCInterface; 4339 } 4340 4341 // Nonsense to "hide" certain members of ObjCObjectType within this 4342 // class. People asking for protocols on an ObjCInterfaceType are 4343 // not going to get what they want: ObjCInterfaceTypes are 4344 // guaranteed to have no protocols. 4345 enum { 4346 qual_iterator, 4347 qual_begin, 4348 qual_end, 4349 getNumProtocols, 4350 getProtocol 4351 }; 4352}; 4353 4354inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4355 if (const ObjCInterfaceType *T = 4356 getBaseType()->getAs<ObjCInterfaceType>()) 4357 return T->getDecl(); 4358 return 0; 4359} 4360 4361/// ObjCObjectPointerType - Used to represent a pointer to an 4362/// Objective C object. These are constructed from pointer 4363/// declarators when the pointee type is an ObjCObjectType (or sugar 4364/// for one). In addition, the 'id' and 'Class' types are typedefs 4365/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4366/// are translated into these. 4367/// 4368/// Pointers to pointers to Objective C objects are still PointerTypes; 4369/// only the first level of pointer gets it own type implementation. 4370class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4371 QualType PointeeType; 4372 4373 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4374 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4375 PointeeType(Pointee) {} 4376 friend class ASTContext; // ASTContext creates these. 4377 4378public: 4379 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4380 /// The result will always be an ObjCObjectType or sugar thereof. 4381 QualType getPointeeType() const { return PointeeType; } 4382 4383 /// getObjCObjectType - Gets the type pointed to by this ObjC 4384 /// pointer. This method always returns non-null. 4385 /// 4386 /// This method is equivalent to getPointeeType() except that 4387 /// it discards any typedefs (or other sugar) between this 4388 /// type and the "outermost" object type. So for: 4389 /// \code 4390 /// \@class A; \@protocol P; \@protocol Q; 4391 /// typedef A<P> AP; 4392 /// typedef A A1; 4393 /// typedef A1<P> A1P; 4394 /// typedef A1P<Q> A1PQ; 4395 /// \endcode 4396 /// For 'A*', getObjectType() will return 'A'. 4397 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4398 /// For 'AP*', getObjectType() will return 'A<P>'. 4399 /// For 'A1*', getObjectType() will return 'A'. 4400 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4401 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4402 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4403 /// adding protocols to a protocol-qualified base discards the 4404 /// old qualifiers (for now). But if it didn't, getObjectType() 4405 /// would return 'A1P<Q>' (and we'd have to make iterating over 4406 /// qualifiers more complicated). 4407 const ObjCObjectType *getObjectType() const { 4408 return PointeeType->castAs<ObjCObjectType>(); 4409 } 4410 4411 /// getInterfaceType - If this pointer points to an Objective C 4412 /// \@interface type, gets the type for that interface. Any protocol 4413 /// qualifiers on the interface are ignored. 4414 /// 4415 /// \return null if the base type for this pointer is 'id' or 'Class' 4416 const ObjCInterfaceType *getInterfaceType() const { 4417 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4418 } 4419 4420 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4421 /// type, gets the declaration for that interface. 4422 /// 4423 /// \return null if the base type for this pointer is 'id' or 'Class' 4424 ObjCInterfaceDecl *getInterfaceDecl() const { 4425 return getObjectType()->getInterface(); 4426 } 4427 4428 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4429 /// its object type is the primitive 'id' type with no protocols. 4430 bool isObjCIdType() const { 4431 return getObjectType()->isObjCUnqualifiedId(); 4432 } 4433 4434 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4435 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4436 bool isObjCClassType() const { 4437 return getObjectType()->isObjCUnqualifiedClass(); 4438 } 4439 4440 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4441 /// non-empty set of protocols. 4442 bool isObjCQualifiedIdType() const { 4443 return getObjectType()->isObjCQualifiedId(); 4444 } 4445 4446 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4447 /// some non-empty set of protocols. 4448 bool isObjCQualifiedClassType() const { 4449 return getObjectType()->isObjCQualifiedClass(); 4450 } 4451 4452 /// An iterator over the qualifiers on the object type. Provided 4453 /// for convenience. This will always iterate over the full set of 4454 /// protocols on a type, not just those provided directly. 4455 typedef ObjCObjectType::qual_iterator qual_iterator; 4456 4457 qual_iterator qual_begin() const { 4458 return getObjectType()->qual_begin(); 4459 } 4460 qual_iterator qual_end() const { 4461 return getObjectType()->qual_end(); 4462 } 4463 bool qual_empty() const { return getObjectType()->qual_empty(); } 4464 4465 /// getNumProtocols - Return the number of qualifying protocols on 4466 /// the object type. 4467 unsigned getNumProtocols() const { 4468 return getObjectType()->getNumProtocols(); 4469 } 4470 4471 /// \brief Retrieve a qualifying protocol by index on the object 4472 /// type. 4473 ObjCProtocolDecl *getProtocol(unsigned I) const { 4474 return getObjectType()->getProtocol(I); 4475 } 4476 4477 bool isSugared() const { return false; } 4478 QualType desugar() const { return QualType(this, 0); } 4479 4480 void Profile(llvm::FoldingSetNodeID &ID) { 4481 Profile(ID, getPointeeType()); 4482 } 4483 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4484 ID.AddPointer(T.getAsOpaquePtr()); 4485 } 4486 static bool classof(const Type *T) { 4487 return T->getTypeClass() == ObjCObjectPointer; 4488 } 4489}; 4490 4491class AtomicType : public Type, public llvm::FoldingSetNode { 4492 QualType ValueType; 4493 4494 AtomicType(QualType ValTy, QualType Canonical) 4495 : Type(Atomic, Canonical, ValTy->isDependentType(), 4496 ValTy->isInstantiationDependentType(), 4497 ValTy->isVariablyModifiedType(), 4498 ValTy->containsUnexpandedParameterPack()), 4499 ValueType(ValTy) {} 4500 friend class ASTContext; // ASTContext creates these. 4501 4502 public: 4503 /// getValueType - Gets the type contained by this atomic type, i.e. 4504 /// the type returned by performing an atomic load of this atomic type. 4505 QualType getValueType() const { return ValueType; } 4506 4507 bool isSugared() const { return false; } 4508 QualType desugar() const { return QualType(this, 0); } 4509 4510 void Profile(llvm::FoldingSetNodeID &ID) { 4511 Profile(ID, getValueType()); 4512 } 4513 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4514 ID.AddPointer(T.getAsOpaquePtr()); 4515 } 4516 static bool classof(const Type *T) { 4517 return T->getTypeClass() == Atomic; 4518 } 4519}; 4520 4521/// A qualifier set is used to build a set of qualifiers. 4522class QualifierCollector : public Qualifiers { 4523public: 4524 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4525 4526 /// Collect any qualifiers on the given type and return an 4527 /// unqualified type. The qualifiers are assumed to be consistent 4528 /// with those already in the type. 4529 const Type *strip(QualType type) { 4530 addFastQualifiers(type.getLocalFastQualifiers()); 4531 if (!type.hasLocalNonFastQualifiers()) 4532 return type.getTypePtrUnsafe(); 4533 4534 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4535 addConsistentQualifiers(extQuals->getQualifiers()); 4536 return extQuals->getBaseType(); 4537 } 4538 4539 /// Apply the collected qualifiers to the given type. 4540 QualType apply(const ASTContext &Context, QualType QT) const; 4541 4542 /// Apply the collected qualifiers to the given type. 4543 QualType apply(const ASTContext &Context, const Type* T) const; 4544}; 4545 4546 4547// Inline function definitions. 4548 4549inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4550 SplitQualType desugar = 4551 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4552 desugar.Quals.addConsistentQualifiers(Quals); 4553 return desugar; 4554} 4555 4556inline const Type *QualType::getTypePtr() const { 4557 return getCommonPtr()->BaseType; 4558} 4559 4560inline const Type *QualType::getTypePtrOrNull() const { 4561 return (isNull() ? 0 : getCommonPtr()->BaseType); 4562} 4563 4564inline SplitQualType QualType::split() const { 4565 if (!hasLocalNonFastQualifiers()) 4566 return SplitQualType(getTypePtrUnsafe(), 4567 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4568 4569 const ExtQuals *eq = getExtQualsUnsafe(); 4570 Qualifiers qs = eq->getQualifiers(); 4571 qs.addFastQualifiers(getLocalFastQualifiers()); 4572 return SplitQualType(eq->getBaseType(), qs); 4573} 4574 4575inline Qualifiers QualType::getLocalQualifiers() const { 4576 Qualifiers Quals; 4577 if (hasLocalNonFastQualifiers()) 4578 Quals = getExtQualsUnsafe()->getQualifiers(); 4579 Quals.addFastQualifiers(getLocalFastQualifiers()); 4580 return Quals; 4581} 4582 4583inline Qualifiers QualType::getQualifiers() const { 4584 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4585 quals.addFastQualifiers(getLocalFastQualifiers()); 4586 return quals; 4587} 4588 4589inline unsigned QualType::getCVRQualifiers() const { 4590 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4591 cvr |= getLocalCVRQualifiers(); 4592 return cvr; 4593} 4594 4595inline QualType QualType::getCanonicalType() const { 4596 QualType canon = getCommonPtr()->CanonicalType; 4597 return canon.withFastQualifiers(getLocalFastQualifiers()); 4598} 4599 4600inline bool QualType::isCanonical() const { 4601 return getTypePtr()->isCanonicalUnqualified(); 4602} 4603 4604inline bool QualType::isCanonicalAsParam() const { 4605 if (!isCanonical()) return false; 4606 if (hasLocalQualifiers()) return false; 4607 4608 const Type *T = getTypePtr(); 4609 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4610 return false; 4611 4612 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4613} 4614 4615inline bool QualType::isConstQualified() const { 4616 return isLocalConstQualified() || 4617 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4618} 4619 4620inline bool QualType::isRestrictQualified() const { 4621 return isLocalRestrictQualified() || 4622 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4623} 4624 4625 4626inline bool QualType::isVolatileQualified() const { 4627 return isLocalVolatileQualified() || 4628 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4629} 4630 4631inline bool QualType::hasQualifiers() const { 4632 return hasLocalQualifiers() || 4633 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4634} 4635 4636inline QualType QualType::getUnqualifiedType() const { 4637 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4638 return QualType(getTypePtr(), 0); 4639 4640 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4641} 4642 4643inline SplitQualType QualType::getSplitUnqualifiedType() const { 4644 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4645 return split(); 4646 4647 return getSplitUnqualifiedTypeImpl(*this); 4648} 4649 4650inline void QualType::removeLocalConst() { 4651 removeLocalFastQualifiers(Qualifiers::Const); 4652} 4653 4654inline void QualType::removeLocalRestrict() { 4655 removeLocalFastQualifiers(Qualifiers::Restrict); 4656} 4657 4658inline void QualType::removeLocalVolatile() { 4659 removeLocalFastQualifiers(Qualifiers::Volatile); 4660} 4661 4662inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4663 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4664 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4665 4666 // Fast path: we don't need to touch the slow qualifiers. 4667 removeLocalFastQualifiers(Mask); 4668} 4669 4670/// getAddressSpace - Return the address space of this type. 4671inline unsigned QualType::getAddressSpace() const { 4672 return getQualifiers().getAddressSpace(); 4673} 4674 4675/// getObjCGCAttr - Return the gc attribute of this type. 4676inline Qualifiers::GC QualType::getObjCGCAttr() const { 4677 return getQualifiers().getObjCGCAttr(); 4678} 4679 4680inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4681 if (const PointerType *PT = t.getAs<PointerType>()) { 4682 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4683 return FT->getExtInfo(); 4684 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4685 return FT->getExtInfo(); 4686 4687 return FunctionType::ExtInfo(); 4688} 4689 4690inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4691 return getFunctionExtInfo(*t); 4692} 4693 4694/// isMoreQualifiedThan - Determine whether this type is more 4695/// qualified than the Other type. For example, "const volatile int" 4696/// is more qualified than "const int", "volatile int", and 4697/// "int". However, it is not more qualified than "const volatile 4698/// int". 4699inline bool QualType::isMoreQualifiedThan(QualType other) const { 4700 Qualifiers myQuals = getQualifiers(); 4701 Qualifiers otherQuals = other.getQualifiers(); 4702 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4703} 4704 4705/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4706/// as qualified as the Other type. For example, "const volatile 4707/// int" is at least as qualified as "const int", "volatile int", 4708/// "int", and "const volatile int". 4709inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4710 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4711} 4712 4713/// getNonReferenceType - If Type is a reference type (e.g., const 4714/// int&), returns the type that the reference refers to ("const 4715/// int"). Otherwise, returns the type itself. This routine is used 4716/// throughout Sema to implement C++ 5p6: 4717/// 4718/// If an expression initially has the type "reference to T" (8.3.2, 4719/// 8.5.3), the type is adjusted to "T" prior to any further 4720/// analysis, the expression designates the object or function 4721/// denoted by the reference, and the expression is an lvalue. 4722inline QualType QualType::getNonReferenceType() const { 4723 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4724 return RefType->getPointeeType(); 4725 else 4726 return *this; 4727} 4728 4729inline bool QualType::isCForbiddenLValueType() const { 4730 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4731 getTypePtr()->isFunctionType()); 4732} 4733 4734/// \brief Tests whether the type is categorized as a fundamental type. 4735/// 4736/// \returns True for types specified in C++0x [basic.fundamental]. 4737inline bool Type::isFundamentalType() const { 4738 return isVoidType() || 4739 // FIXME: It's really annoying that we don't have an 4740 // 'isArithmeticType()' which agrees with the standard definition. 4741 (isArithmeticType() && !isEnumeralType()); 4742} 4743 4744/// \brief Tests whether the type is categorized as a compound type. 4745/// 4746/// \returns True for types specified in C++0x [basic.compound]. 4747inline bool Type::isCompoundType() const { 4748 // C++0x [basic.compound]p1: 4749 // Compound types can be constructed in the following ways: 4750 // -- arrays of objects of a given type [...]; 4751 return isArrayType() || 4752 // -- functions, which have parameters of given types [...]; 4753 isFunctionType() || 4754 // -- pointers to void or objects or functions [...]; 4755 isPointerType() || 4756 // -- references to objects or functions of a given type. [...] 4757 isReferenceType() || 4758 // -- classes containing a sequence of objects of various types, [...]; 4759 isRecordType() || 4760 // -- unions, which are classes capable of containing objects of different 4761 // types at different times; 4762 isUnionType() || 4763 // -- enumerations, which comprise a set of named constant values. [...]; 4764 isEnumeralType() || 4765 // -- pointers to non-static class members, [...]. 4766 isMemberPointerType(); 4767} 4768 4769inline bool Type::isFunctionType() const { 4770 return isa<FunctionType>(CanonicalType); 4771} 4772inline bool Type::isPointerType() const { 4773 return isa<PointerType>(CanonicalType); 4774} 4775inline bool Type::isAnyPointerType() const { 4776 return isPointerType() || isObjCObjectPointerType(); 4777} 4778inline bool Type::isBlockPointerType() const { 4779 return isa<BlockPointerType>(CanonicalType); 4780} 4781inline bool Type::isReferenceType() const { 4782 return isa<ReferenceType>(CanonicalType); 4783} 4784inline bool Type::isLValueReferenceType() const { 4785 return isa<LValueReferenceType>(CanonicalType); 4786} 4787inline bool Type::isRValueReferenceType() const { 4788 return isa<RValueReferenceType>(CanonicalType); 4789} 4790inline bool Type::isFunctionPointerType() const { 4791 if (const PointerType *T = getAs<PointerType>()) 4792 return T->getPointeeType()->isFunctionType(); 4793 else 4794 return false; 4795} 4796inline bool Type::isMemberPointerType() const { 4797 return isa<MemberPointerType>(CanonicalType); 4798} 4799inline bool Type::isMemberFunctionPointerType() const { 4800 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4801 return T->isMemberFunctionPointer(); 4802 else 4803 return false; 4804} 4805inline bool Type::isMemberDataPointerType() const { 4806 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4807 return T->isMemberDataPointer(); 4808 else 4809 return false; 4810} 4811inline bool Type::isArrayType() const { 4812 return isa<ArrayType>(CanonicalType); 4813} 4814inline bool Type::isConstantArrayType() const { 4815 return isa<ConstantArrayType>(CanonicalType); 4816} 4817inline bool Type::isIncompleteArrayType() const { 4818 return isa<IncompleteArrayType>(CanonicalType); 4819} 4820inline bool Type::isVariableArrayType() const { 4821 return isa<VariableArrayType>(CanonicalType); 4822} 4823inline bool Type::isDependentSizedArrayType() const { 4824 return isa<DependentSizedArrayType>(CanonicalType); 4825} 4826inline bool Type::isBuiltinType() const { 4827 return isa<BuiltinType>(CanonicalType); 4828} 4829inline bool Type::isRecordType() const { 4830 return isa<RecordType>(CanonicalType); 4831} 4832inline bool Type::isEnumeralType() const { 4833 return isa<EnumType>(CanonicalType); 4834} 4835inline bool Type::isAnyComplexType() const { 4836 return isa<ComplexType>(CanonicalType); 4837} 4838inline bool Type::isVectorType() const { 4839 return isa<VectorType>(CanonicalType); 4840} 4841inline bool Type::isExtVectorType() const { 4842 return isa<ExtVectorType>(CanonicalType); 4843} 4844inline bool Type::isObjCObjectPointerType() const { 4845 return isa<ObjCObjectPointerType>(CanonicalType); 4846} 4847inline bool Type::isObjCObjectType() const { 4848 return isa<ObjCObjectType>(CanonicalType); 4849} 4850inline bool Type::isObjCObjectOrInterfaceType() const { 4851 return isa<ObjCInterfaceType>(CanonicalType) || 4852 isa<ObjCObjectType>(CanonicalType); 4853} 4854inline bool Type::isAtomicType() const { 4855 return isa<AtomicType>(CanonicalType); 4856} 4857 4858inline bool Type::isObjCQualifiedIdType() const { 4859 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4860 return OPT->isObjCQualifiedIdType(); 4861 return false; 4862} 4863inline bool Type::isObjCQualifiedClassType() const { 4864 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4865 return OPT->isObjCQualifiedClassType(); 4866 return false; 4867} 4868inline bool Type::isObjCIdType() const { 4869 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4870 return OPT->isObjCIdType(); 4871 return false; 4872} 4873inline bool Type::isObjCClassType() const { 4874 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4875 return OPT->isObjCClassType(); 4876 return false; 4877} 4878inline bool Type::isObjCSelType() const { 4879 if (const PointerType *OPT = getAs<PointerType>()) 4880 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4881 return false; 4882} 4883inline bool Type::isObjCBuiltinType() const { 4884 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4885} 4886inline bool Type::isTemplateTypeParmType() const { 4887 return isa<TemplateTypeParmType>(CanonicalType); 4888} 4889 4890inline bool Type::isSpecificBuiltinType(unsigned K) const { 4891 if (const BuiltinType *BT = getAs<BuiltinType>()) 4892 if (BT->getKind() == (BuiltinType::Kind) K) 4893 return true; 4894 return false; 4895} 4896 4897inline bool Type::isPlaceholderType() const { 4898 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4899 return BT->isPlaceholderType(); 4900 return false; 4901} 4902 4903inline const BuiltinType *Type::getAsPlaceholderType() const { 4904 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4905 if (BT->isPlaceholderType()) 4906 return BT; 4907 return 0; 4908} 4909 4910inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4911 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4912 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4913 return (BT->getKind() == (BuiltinType::Kind) K); 4914 return false; 4915} 4916 4917inline bool Type::isNonOverloadPlaceholderType() const { 4918 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4919 return BT->isNonOverloadPlaceholderType(); 4920 return false; 4921} 4922 4923inline bool Type::isVoidType() const { 4924 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4925 return BT->getKind() == BuiltinType::Void; 4926 return false; 4927} 4928 4929inline bool Type::isHalfType() const { 4930 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4931 return BT->getKind() == BuiltinType::Half; 4932 // FIXME: Should we allow complex __fp16? Probably not. 4933 return false; 4934} 4935 4936inline bool Type::isNullPtrType() const { 4937 if (const BuiltinType *BT = getAs<BuiltinType>()) 4938 return BT->getKind() == BuiltinType::NullPtr; 4939 return false; 4940} 4941 4942extern bool IsEnumDeclComplete(EnumDecl *); 4943extern bool IsEnumDeclScoped(EnumDecl *); 4944 4945inline bool Type::isIntegerType() const { 4946 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4947 return BT->getKind() >= BuiltinType::Bool && 4948 BT->getKind() <= BuiltinType::Int128; 4949 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4950 // Incomplete enum types are not treated as integer types. 4951 // FIXME: In C++, enum types are never integer types. 4952 return IsEnumDeclComplete(ET->getDecl()) && 4953 !IsEnumDeclScoped(ET->getDecl()); 4954 } 4955 return false; 4956} 4957 4958inline bool Type::isScalarType() const { 4959 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4960 return BT->getKind() > BuiltinType::Void && 4961 BT->getKind() <= BuiltinType::NullPtr; 4962 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4963 // Enums are scalar types, but only if they are defined. Incomplete enums 4964 // are not treated as scalar types. 4965 return IsEnumDeclComplete(ET->getDecl()); 4966 return isa<PointerType>(CanonicalType) || 4967 isa<BlockPointerType>(CanonicalType) || 4968 isa<MemberPointerType>(CanonicalType) || 4969 isa<ComplexType>(CanonicalType) || 4970 isa<ObjCObjectPointerType>(CanonicalType); 4971} 4972 4973inline bool Type::isIntegralOrEnumerationType() const { 4974 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4975 return BT->getKind() >= BuiltinType::Bool && 4976 BT->getKind() <= BuiltinType::Int128; 4977 4978 // Check for a complete enum type; incomplete enum types are not properly an 4979 // enumeration type in the sense required here. 4980 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4981 return IsEnumDeclComplete(ET->getDecl()); 4982 4983 return false; 4984} 4985 4986inline bool Type::isBooleanType() const { 4987 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4988 return BT->getKind() == BuiltinType::Bool; 4989 return false; 4990} 4991 4992/// \brief Determines whether this is a type for which one can define 4993/// an overloaded operator. 4994inline bool Type::isOverloadableType() const { 4995 return isDependentType() || isRecordType() || isEnumeralType(); 4996} 4997 4998/// \brief Determines whether this type can decay to a pointer type. 4999inline bool Type::canDecayToPointerType() const { 5000 return isFunctionType() || isArrayType(); 5001} 5002 5003inline bool Type::hasPointerRepresentation() const { 5004 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5005 isObjCObjectPointerType() || isNullPtrType()); 5006} 5007 5008inline bool Type::hasObjCPointerRepresentation() const { 5009 return isObjCObjectPointerType(); 5010} 5011 5012inline const Type *Type::getBaseElementTypeUnsafe() const { 5013 const Type *type = this; 5014 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5015 type = arrayType->getElementType().getTypePtr(); 5016 return type; 5017} 5018 5019/// Insertion operator for diagnostics. This allows sending QualType's into a 5020/// diagnostic with <<. 5021inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5022 QualType T) { 5023 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5024 DiagnosticsEngine::ak_qualtype); 5025 return DB; 5026} 5027 5028/// Insertion operator for partial diagnostics. This allows sending QualType's 5029/// into a diagnostic with <<. 5030inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5031 QualType T) { 5032 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5033 DiagnosticsEngine::ak_qualtype); 5034 return PD; 5035} 5036 5037// Helper class template that is used by Type::getAs to ensure that one does 5038// not try to look through a qualified type to get to an array type. 5039template<typename T, 5040 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5041 llvm::is_base_of<ArrayType, T>::value)> 5042struct ArrayType_cannot_be_used_with_getAs { }; 5043 5044template<typename T> 5045struct ArrayType_cannot_be_used_with_getAs<T, true>; 5046 5047// Member-template getAs<specific type>'. 5048template <typename T> const T *Type::getAs() const { 5049 ArrayType_cannot_be_used_with_getAs<T> at; 5050 (void)at; 5051 5052 // If this is directly a T type, return it. 5053 if (const T *Ty = dyn_cast<T>(this)) 5054 return Ty; 5055 5056 // If the canonical form of this type isn't the right kind, reject it. 5057 if (!isa<T>(CanonicalType)) 5058 return 0; 5059 5060 // If this is a typedef for the type, strip the typedef off without 5061 // losing all typedef information. 5062 return cast<T>(getUnqualifiedDesugaredType()); 5063} 5064 5065inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5066 // If this is directly an array type, return it. 5067 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5068 return arr; 5069 5070 // If the canonical form of this type isn't the right kind, reject it. 5071 if (!isa<ArrayType>(CanonicalType)) 5072 return 0; 5073 5074 // If this is a typedef for the type, strip the typedef off without 5075 // losing all typedef information. 5076 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5077} 5078 5079template <typename T> const T *Type::castAs() const { 5080 ArrayType_cannot_be_used_with_getAs<T> at; 5081 (void) at; 5082 5083 assert(isa<T>(CanonicalType)); 5084 if (const T *ty = dyn_cast<T>(this)) return ty; 5085 return cast<T>(getUnqualifiedDesugaredType()); 5086} 5087 5088inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5089 assert(isa<ArrayType>(CanonicalType)); 5090 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5091 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5092} 5093 5094} // end namespace clang 5095 5096#endif 5097