Type.h revision e6b9d802fb7b16d93474c4f1c179ab36202e8a8b
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/AST/NestedNameSpecifier.h" 18#include "clang/AST/TemplateName.h" 19#include "clang/Basic/Diagnostic.h" 20#include "clang/Basic/ExceptionSpecificationType.h" 21#include "clang/Basic/IdentifierTable.h" 22#include "clang/Basic/LLVM.h" 23#include "clang/Basic/Linkage.h" 24#include "clang/Basic/PartialDiagnostic.h" 25#include "clang/Basic/Specifiers.h" 26#include "clang/Basic/Visibility.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32#include "llvm/ADT/Twine.h" 33#include "llvm/Support/ErrorHandling.h" 34#include "llvm/Support/type_traits.h" 35 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefNameDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class FunctionDecl; 85 class ObjCInterfaceDecl; 86 class ObjCProtocolDecl; 87 class ObjCMethodDecl; 88 class UnresolvedUsingTypenameDecl; 89 class Expr; 90 class Stmt; 91 class SourceLocation; 92 class StmtIteratorBase; 93 class TemplateArgument; 94 class TemplateArgumentLoc; 95 class TemplateArgumentListInfo; 96 class ElaboratedType; 97 class ExtQuals; 98 class ExtQualsTypeCommonBase; 99 struct PrintingPolicy; 100 101 template <typename> class CanQual; 102 typedef CanQual<Type> CanQualType; 103 104 // Provide forward declarations for all of the *Type classes 105#define TYPE(Class, Base) class Class##Type; 106#include "clang/AST/TypeNodes.def" 107 108/// Qualifiers - The collection of all-type qualifiers we support. 109/// Clang supports five independent qualifiers: 110/// * C99: const, volatile, and restrict 111/// * Embedded C (TR18037): address spaces 112/// * Objective C: the GC attributes (none, weak, or strong) 113class Qualifiers { 114public: 115 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 116 Const = 0x1, 117 Restrict = 0x2, 118 Volatile = 0x4, 119 CVRMask = Const | Volatile | Restrict 120 }; 121 122 enum GC { 123 GCNone = 0, 124 Weak, 125 Strong 126 }; 127 128 enum ObjCLifetime { 129 /// There is no lifetime qualification on this type. 130 OCL_None, 131 132 /// This object can be modified without requiring retains or 133 /// releases. 134 OCL_ExplicitNone, 135 136 /// Assigning into this object requires the old value to be 137 /// released and the new value to be retained. The timing of the 138 /// release of the old value is inexact: it may be moved to 139 /// immediately after the last known point where the value is 140 /// live. 141 OCL_Strong, 142 143 /// Reading or writing from this object requires a barrier call. 144 OCL_Weak, 145 146 /// Assigning into this object requires a lifetime extension. 147 OCL_Autoreleasing 148 }; 149 150 enum { 151 /// The maximum supported address space number. 152 /// 24 bits should be enough for anyone. 153 MaxAddressSpace = 0xffffffu, 154 155 /// The width of the "fast" qualifier mask. 156 FastWidth = 3, 157 158 /// The fast qualifier mask. 159 FastMask = (1 << FastWidth) - 1 160 }; 161 162 Qualifiers() : Mask(0) {} 163 164 /// \brief Returns the common set of qualifiers while removing them from 165 /// the given sets. 166 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { 167 // If both are only CVR-qualified, bit operations are sufficient. 168 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { 169 Qualifiers Q; 170 Q.Mask = L.Mask & R.Mask; 171 L.Mask &= ~Q.Mask; 172 R.Mask &= ~Q.Mask; 173 return Q; 174 } 175 176 Qualifiers Q; 177 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); 178 Q.addCVRQualifiers(CommonCRV); 179 L.removeCVRQualifiers(CommonCRV); 180 R.removeCVRQualifiers(CommonCRV); 181 182 if (L.getObjCGCAttr() == R.getObjCGCAttr()) { 183 Q.setObjCGCAttr(L.getObjCGCAttr()); 184 L.removeObjCGCAttr(); 185 R.removeObjCGCAttr(); 186 } 187 188 if (L.getObjCLifetime() == R.getObjCLifetime()) { 189 Q.setObjCLifetime(L.getObjCLifetime()); 190 L.removeObjCLifetime(); 191 R.removeObjCLifetime(); 192 } 193 194 if (L.getAddressSpace() == R.getAddressSpace()) { 195 Q.setAddressSpace(L.getAddressSpace()); 196 L.removeAddressSpace(); 197 R.removeAddressSpace(); 198 } 199 return Q; 200 } 201 202 static Qualifiers fromFastMask(unsigned Mask) { 203 Qualifiers Qs; 204 Qs.addFastQualifiers(Mask); 205 return Qs; 206 } 207 208 static Qualifiers fromCVRMask(unsigned CVR) { 209 Qualifiers Qs; 210 Qs.addCVRQualifiers(CVR); 211 return Qs; 212 } 213 214 // Deserialize qualifiers from an opaque representation. 215 static Qualifiers fromOpaqueValue(unsigned opaque) { 216 Qualifiers Qs; 217 Qs.Mask = opaque; 218 return Qs; 219 } 220 221 // Serialize these qualifiers into an opaque representation. 222 unsigned getAsOpaqueValue() const { 223 return Mask; 224 } 225 226 bool hasConst() const { return Mask & Const; } 227 void setConst(bool flag) { 228 Mask = (Mask & ~Const) | (flag ? Const : 0); 229 } 230 void removeConst() { Mask &= ~Const; } 231 void addConst() { Mask |= Const; } 232 233 bool hasVolatile() const { return Mask & Volatile; } 234 void setVolatile(bool flag) { 235 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 236 } 237 void removeVolatile() { Mask &= ~Volatile; } 238 void addVolatile() { Mask |= Volatile; } 239 240 bool hasRestrict() const { return Mask & Restrict; } 241 void setRestrict(bool flag) { 242 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 243 } 244 void removeRestrict() { Mask &= ~Restrict; } 245 void addRestrict() { Mask |= Restrict; } 246 247 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 248 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 249 void setCVRQualifiers(unsigned mask) { 250 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 251 Mask = (Mask & ~CVRMask) | mask; 252 } 253 void removeCVRQualifiers(unsigned mask) { 254 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 255 Mask &= ~mask; 256 } 257 void removeCVRQualifiers() { 258 removeCVRQualifiers(CVRMask); 259 } 260 void addCVRQualifiers(unsigned mask) { 261 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 262 Mask |= mask; 263 } 264 265 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 266 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 267 void setObjCGCAttr(GC type) { 268 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 269 } 270 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 271 void addObjCGCAttr(GC type) { 272 assert(type); 273 setObjCGCAttr(type); 274 } 275 Qualifiers withoutObjCGCAttr() const { 276 Qualifiers qs = *this; 277 qs.removeObjCGCAttr(); 278 return qs; 279 } 280 Qualifiers withoutObjCLifetime() const { 281 Qualifiers qs = *this; 282 qs.removeObjCLifetime(); 283 return qs; 284 } 285 286 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 287 ObjCLifetime getObjCLifetime() const { 288 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 289 } 290 void setObjCLifetime(ObjCLifetime type) { 291 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 292 } 293 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 294 void addObjCLifetime(ObjCLifetime type) { 295 assert(type); 296 assert(!hasObjCLifetime()); 297 Mask |= (type << LifetimeShift); 298 } 299 300 /// True if the lifetime is neither None or ExplicitNone. 301 bool hasNonTrivialObjCLifetime() const { 302 ObjCLifetime lifetime = getObjCLifetime(); 303 return (lifetime > OCL_ExplicitNone); 304 } 305 306 /// True if the lifetime is either strong or weak. 307 bool hasStrongOrWeakObjCLifetime() const { 308 ObjCLifetime lifetime = getObjCLifetime(); 309 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 310 } 311 312 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 313 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 314 void setAddressSpace(unsigned space) { 315 assert(space <= MaxAddressSpace); 316 Mask = (Mask & ~AddressSpaceMask) 317 | (((uint32_t) space) << AddressSpaceShift); 318 } 319 void removeAddressSpace() { setAddressSpace(0); } 320 void addAddressSpace(unsigned space) { 321 assert(space); 322 setAddressSpace(space); 323 } 324 325 // Fast qualifiers are those that can be allocated directly 326 // on a QualType object. 327 bool hasFastQualifiers() const { return getFastQualifiers(); } 328 unsigned getFastQualifiers() const { return Mask & FastMask; } 329 void setFastQualifiers(unsigned mask) { 330 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 331 Mask = (Mask & ~FastMask) | mask; 332 } 333 void removeFastQualifiers(unsigned mask) { 334 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 335 Mask &= ~mask; 336 } 337 void removeFastQualifiers() { 338 removeFastQualifiers(FastMask); 339 } 340 void addFastQualifiers(unsigned mask) { 341 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 342 Mask |= mask; 343 } 344 345 /// hasNonFastQualifiers - Return true if the set contains any 346 /// qualifiers which require an ExtQuals node to be allocated. 347 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 348 Qualifiers getNonFastQualifiers() const { 349 Qualifiers Quals = *this; 350 Quals.setFastQualifiers(0); 351 return Quals; 352 } 353 354 /// hasQualifiers - Return true if the set contains any qualifiers. 355 bool hasQualifiers() const { return Mask; } 356 bool empty() const { return !Mask; } 357 358 /// \brief Add the qualifiers from the given set to this set. 359 void addQualifiers(Qualifiers Q) { 360 // If the other set doesn't have any non-boolean qualifiers, just 361 // bit-or it in. 362 if (!(Q.Mask & ~CVRMask)) 363 Mask |= Q.Mask; 364 else { 365 Mask |= (Q.Mask & CVRMask); 366 if (Q.hasAddressSpace()) 367 addAddressSpace(Q.getAddressSpace()); 368 if (Q.hasObjCGCAttr()) 369 addObjCGCAttr(Q.getObjCGCAttr()); 370 if (Q.hasObjCLifetime()) 371 addObjCLifetime(Q.getObjCLifetime()); 372 } 373 } 374 375 /// \brief Remove the qualifiers from the given set from this set. 376 void removeQualifiers(Qualifiers Q) { 377 // If the other set doesn't have any non-boolean qualifiers, just 378 // bit-and the inverse in. 379 if (!(Q.Mask & ~CVRMask)) 380 Mask &= ~Q.Mask; 381 else { 382 Mask &= ~(Q.Mask & CVRMask); 383 if (getObjCGCAttr() == Q.getObjCGCAttr()) 384 removeObjCGCAttr(); 385 if (getObjCLifetime() == Q.getObjCLifetime()) 386 removeObjCLifetime(); 387 if (getAddressSpace() == Q.getAddressSpace()) 388 removeAddressSpace(); 389 } 390 } 391 392 /// \brief Add the qualifiers from the given set to this set, given that 393 /// they don't conflict. 394 void addConsistentQualifiers(Qualifiers qs) { 395 assert(getAddressSpace() == qs.getAddressSpace() || 396 !hasAddressSpace() || !qs.hasAddressSpace()); 397 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 398 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 399 assert(getObjCLifetime() == qs.getObjCLifetime() || 400 !hasObjCLifetime() || !qs.hasObjCLifetime()); 401 Mask |= qs.Mask; 402 } 403 404 /// \brief Determines if these qualifiers compatibly include another set. 405 /// Generally this answers the question of whether an object with the other 406 /// qualifiers can be safely used as an object with these qualifiers. 407 bool compatiblyIncludes(Qualifiers other) const { 408 return 409 // Address spaces must match exactly. 410 getAddressSpace() == other.getAddressSpace() && 411 // ObjC GC qualifiers can match, be added, or be removed, but can't be 412 // changed. 413 (getObjCGCAttr() == other.getObjCGCAttr() || 414 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 415 // ObjC lifetime qualifiers must match exactly. 416 getObjCLifetime() == other.getObjCLifetime() && 417 // CVR qualifiers may subset. 418 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 419 } 420 421 /// \brief Determines if these qualifiers compatibly include another set of 422 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 423 /// 424 /// One set of Objective-C lifetime qualifiers compatibly includes the other 425 /// if the lifetime qualifiers match, or if both are non-__weak and the 426 /// including set also contains the 'const' qualifier. 427 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 428 if (getObjCLifetime() == other.getObjCLifetime()) 429 return true; 430 431 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 432 return false; 433 434 return hasConst(); 435 } 436 437 /// \brief Determine whether this set of qualifiers is a strict superset of 438 /// another set of qualifiers, not considering qualifier compatibility. 439 bool isStrictSupersetOf(Qualifiers Other) const; 440 441 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 442 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 443 444 operator bool() const { return hasQualifiers(); } 445 446 Qualifiers &operator+=(Qualifiers R) { 447 addQualifiers(R); 448 return *this; 449 } 450 451 // Union two qualifier sets. If an enumerated qualifier appears 452 // in both sets, use the one from the right. 453 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 454 L += R; 455 return L; 456 } 457 458 Qualifiers &operator-=(Qualifiers R) { 459 removeQualifiers(R); 460 return *this; 461 } 462 463 /// \brief Compute the difference between two qualifier sets. 464 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 465 L -= R; 466 return L; 467 } 468 469 std::string getAsString() const; 470 std::string getAsString(const PrintingPolicy &Policy) const; 471 472 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; 473 void print(raw_ostream &OS, const PrintingPolicy &Policy, 474 bool appendSpaceIfNonEmpty = false) const; 475 476 void Profile(llvm::FoldingSetNodeID &ID) const { 477 ID.AddInteger(Mask); 478 } 479 480private: 481 482 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 483 // |C R V|GCAttr|Lifetime|AddressSpace| 484 uint32_t Mask; 485 486 static const uint32_t GCAttrMask = 0x18; 487 static const uint32_t GCAttrShift = 3; 488 static const uint32_t LifetimeMask = 0xE0; 489 static const uint32_t LifetimeShift = 5; 490 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 491 static const uint32_t AddressSpaceShift = 8; 492}; 493 494/// A std::pair-like structure for storing a qualified type split 495/// into its local qualifiers and its locally-unqualified type. 496struct SplitQualType { 497 /// The locally-unqualified type. 498 const Type *Ty; 499 500 /// The local qualifiers. 501 Qualifiers Quals; 502 503 SplitQualType() : Ty(0), Quals() {} 504 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 505 506 SplitQualType getSingleStepDesugaredType() const; // end of this file 507 508 // Make llvm::tie work. 509 operator std::pair<const Type *,Qualifiers>() const { 510 return std::pair<const Type *,Qualifiers>(Ty, Quals); 511 } 512 513 friend bool operator==(SplitQualType a, SplitQualType b) { 514 return a.Ty == b.Ty && a.Quals == b.Quals; 515 } 516 friend bool operator!=(SplitQualType a, SplitQualType b) { 517 return a.Ty != b.Ty || a.Quals != b.Quals; 518 } 519}; 520 521/// QualType - For efficiency, we don't store CV-qualified types as nodes on 522/// their own: instead each reference to a type stores the qualifiers. This 523/// greatly reduces the number of nodes we need to allocate for types (for 524/// example we only need one for 'int', 'const int', 'volatile int', 525/// 'const volatile int', etc). 526/// 527/// As an added efficiency bonus, instead of making this a pair, we 528/// just store the two bits we care about in the low bits of the 529/// pointer. To handle the packing/unpacking, we make QualType be a 530/// simple wrapper class that acts like a smart pointer. A third bit 531/// indicates whether there are extended qualifiers present, in which 532/// case the pointer points to a special structure. 533class QualType { 534 // Thankfully, these are efficiently composable. 535 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 536 Qualifiers::FastWidth> Value; 537 538 const ExtQuals *getExtQualsUnsafe() const { 539 return Value.getPointer().get<const ExtQuals*>(); 540 } 541 542 const Type *getTypePtrUnsafe() const { 543 return Value.getPointer().get<const Type*>(); 544 } 545 546 const ExtQualsTypeCommonBase *getCommonPtr() const { 547 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 548 uintptr_t CommonPtrVal 549 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 550 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 551 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 552 } 553 554 friend class QualifierCollector; 555public: 556 QualType() {} 557 558 QualType(const Type *Ptr, unsigned Quals) 559 : Value(Ptr, Quals) {} 560 QualType(const ExtQuals *Ptr, unsigned Quals) 561 : Value(Ptr, Quals) {} 562 563 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 564 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 565 566 /// Retrieves a pointer to the underlying (unqualified) type. 567 /// 568 /// This function requires that the type not be NULL. If the type might be 569 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 570 const Type *getTypePtr() const; 571 572 const Type *getTypePtrOrNull() const; 573 574 /// Retrieves a pointer to the name of the base type. 575 const IdentifierInfo *getBaseTypeIdentifier() const; 576 577 /// Divides a QualType into its unqualified type and a set of local 578 /// qualifiers. 579 SplitQualType split() const; 580 581 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 582 static QualType getFromOpaquePtr(const void *Ptr) { 583 QualType T; 584 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 585 return T; 586 } 587 588 const Type &operator*() const { 589 return *getTypePtr(); 590 } 591 592 const Type *operator->() const { 593 return getTypePtr(); 594 } 595 596 bool isCanonical() const; 597 bool isCanonicalAsParam() const; 598 599 /// isNull - Return true if this QualType doesn't point to a type yet. 600 bool isNull() const { 601 return Value.getPointer().isNull(); 602 } 603 604 /// \brief Determine whether this particular QualType instance has the 605 /// "const" qualifier set, without looking through typedefs that may have 606 /// added "const" at a different level. 607 bool isLocalConstQualified() const { 608 return (getLocalFastQualifiers() & Qualifiers::Const); 609 } 610 611 /// \brief Determine whether this type is const-qualified. 612 bool isConstQualified() const; 613 614 /// \brief Determine whether this particular QualType instance has the 615 /// "restrict" qualifier set, without looking through typedefs that may have 616 /// added "restrict" at a different level. 617 bool isLocalRestrictQualified() const { 618 return (getLocalFastQualifiers() & Qualifiers::Restrict); 619 } 620 621 /// \brief Determine whether this type is restrict-qualified. 622 bool isRestrictQualified() const; 623 624 /// \brief Determine whether this particular QualType instance has the 625 /// "volatile" qualifier set, without looking through typedefs that may have 626 /// added "volatile" at a different level. 627 bool isLocalVolatileQualified() const { 628 return (getLocalFastQualifiers() & Qualifiers::Volatile); 629 } 630 631 /// \brief Determine whether this type is volatile-qualified. 632 bool isVolatileQualified() const; 633 634 /// \brief Determine whether this particular QualType instance has any 635 /// qualifiers, without looking through any typedefs that might add 636 /// qualifiers at a different level. 637 bool hasLocalQualifiers() const { 638 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 639 } 640 641 /// \brief Determine whether this type has any qualifiers. 642 bool hasQualifiers() const; 643 644 /// \brief Determine whether this particular QualType instance has any 645 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 646 /// instance. 647 bool hasLocalNonFastQualifiers() const { 648 return Value.getPointer().is<const ExtQuals*>(); 649 } 650 651 /// \brief Retrieve the set of qualifiers local to this particular QualType 652 /// instance, not including any qualifiers acquired through typedefs or 653 /// other sugar. 654 Qualifiers getLocalQualifiers() const; 655 656 /// \brief Retrieve the set of qualifiers applied to this type. 657 Qualifiers getQualifiers() const; 658 659 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 660 /// local to this particular QualType instance, not including any qualifiers 661 /// acquired through typedefs or other sugar. 662 unsigned getLocalCVRQualifiers() const { 663 return getLocalFastQualifiers(); 664 } 665 666 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 667 /// applied to this type. 668 unsigned getCVRQualifiers() const; 669 670 bool isConstant(ASTContext& Ctx) const { 671 return QualType::isConstant(*this, Ctx); 672 } 673 674 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 675 bool isPODType(ASTContext &Context) const; 676 677 /// isCXX98PODType() - Return true if this is a POD type according to the 678 /// rules of the C++98 standard, regardless of the current compilation's 679 /// language. 680 bool isCXX98PODType(ASTContext &Context) const; 681 682 /// isCXX11PODType() - Return true if this is a POD type according to the 683 /// more relaxed rules of the C++11 standard, regardless of the current 684 /// compilation's language. 685 /// (C++0x [basic.types]p9) 686 bool isCXX11PODType(ASTContext &Context) const; 687 688 /// isTrivialType - Return true if this is a trivial type 689 /// (C++0x [basic.types]p9) 690 bool isTrivialType(ASTContext &Context) const; 691 692 /// isTriviallyCopyableType - Return true if this is a trivially 693 /// copyable type (C++0x [basic.types]p9) 694 bool isTriviallyCopyableType(ASTContext &Context) const; 695 696 // Don't promise in the API that anything besides 'const' can be 697 // easily added. 698 699 /// addConst - add the specified type qualifier to this QualType. 700 void addConst() { 701 addFastQualifiers(Qualifiers::Const); 702 } 703 QualType withConst() const { 704 return withFastQualifiers(Qualifiers::Const); 705 } 706 707 /// addVolatile - add the specified type qualifier to this QualType. 708 void addVolatile() { 709 addFastQualifiers(Qualifiers::Volatile); 710 } 711 QualType withVolatile() const { 712 return withFastQualifiers(Qualifiers::Volatile); 713 } 714 715 /// Add the restrict qualifier to this QualType. 716 void addRestrict() { 717 addFastQualifiers(Qualifiers::Restrict); 718 } 719 QualType withRestrict() const { 720 return withFastQualifiers(Qualifiers::Restrict); 721 } 722 723 QualType withCVRQualifiers(unsigned CVR) const { 724 return withFastQualifiers(CVR); 725 } 726 727 void addFastQualifiers(unsigned TQs) { 728 assert(!(TQs & ~Qualifiers::FastMask) 729 && "non-fast qualifier bits set in mask!"); 730 Value.setInt(Value.getInt() | TQs); 731 } 732 733 void removeLocalConst(); 734 void removeLocalVolatile(); 735 void removeLocalRestrict(); 736 void removeLocalCVRQualifiers(unsigned Mask); 737 738 void removeLocalFastQualifiers() { Value.setInt(0); } 739 void removeLocalFastQualifiers(unsigned Mask) { 740 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 741 Value.setInt(Value.getInt() & ~Mask); 742 } 743 744 // Creates a type with the given qualifiers in addition to any 745 // qualifiers already on this type. 746 QualType withFastQualifiers(unsigned TQs) const { 747 QualType T = *this; 748 T.addFastQualifiers(TQs); 749 return T; 750 } 751 752 // Creates a type with exactly the given fast qualifiers, removing 753 // any existing fast qualifiers. 754 QualType withExactLocalFastQualifiers(unsigned TQs) const { 755 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 756 } 757 758 // Removes fast qualifiers, but leaves any extended qualifiers in place. 759 QualType withoutLocalFastQualifiers() const { 760 QualType T = *this; 761 T.removeLocalFastQualifiers(); 762 return T; 763 } 764 765 QualType getCanonicalType() const; 766 767 /// \brief Return this type with all of the instance-specific qualifiers 768 /// removed, but without removing any qualifiers that may have been applied 769 /// through typedefs. 770 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 771 772 /// \brief Retrieve the unqualified variant of the given type, 773 /// removing as little sugar as possible. 774 /// 775 /// This routine looks through various kinds of sugar to find the 776 /// least-desugared type that is unqualified. For example, given: 777 /// 778 /// \code 779 /// typedef int Integer; 780 /// typedef const Integer CInteger; 781 /// typedef CInteger DifferenceType; 782 /// \endcode 783 /// 784 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 785 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 786 /// 787 /// The resulting type might still be qualified if it's an array 788 /// type. To strip qualifiers even from within an array type, use 789 /// ASTContext::getUnqualifiedArrayType. 790 inline QualType getUnqualifiedType() const; 791 792 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 793 /// given type, removing as little sugar as possible. 794 /// 795 /// Like getUnqualifiedType(), but also returns the set of 796 /// qualifiers that were built up. 797 /// 798 /// The resulting type might still be qualified if it's an array 799 /// type. To strip qualifiers even from within an array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982private: 983 // These methods are implemented in a separate translation unit; 984 // "static"-ize them to avoid creating temporary QualTypes in the 985 // caller. 986 static bool isConstant(QualType T, ASTContext& Ctx); 987 static QualType getDesugaredType(QualType T, const ASTContext &Context); 988 static SplitQualType getSplitDesugaredType(QualType T); 989 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 990 static QualType getSingleStepDesugaredTypeImpl(QualType type, 991 const ASTContext &C); 992 static QualType IgnoreParens(QualType T); 993 static DestructionKind isDestructedTypeImpl(QualType type); 994}; 995 996} // end clang. 997 998namespace llvm { 999/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000/// to a specific Type class. 1001template<> struct simplify_type<const ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 1004 return Val.getTypePtr(); 1005 } 1006}; 1007template<> struct simplify_type< ::clang::QualType> 1008 : public simplify_type<const ::clang::QualType> {}; 1009 1010// Teach SmallPtrSet that QualType is "basically a pointer". 1011template<> 1012class PointerLikeTypeTraits<clang::QualType> { 1013public: 1014 static inline void *getAsVoidPointer(clang::QualType P) { 1015 return P.getAsOpaquePtr(); 1016 } 1017 static inline clang::QualType getFromVoidPointer(void *P) { 1018 return clang::QualType::getFromOpaquePtr(P); 1019 } 1020 // Various qualifiers go in low bits. 1021 enum { NumLowBitsAvailable = 0 }; 1022}; 1023 1024} // end namespace llvm 1025 1026namespace clang { 1027 1028/// \brief Base class that is common to both the \c ExtQuals and \c Type 1029/// classes, which allows \c QualType to access the common fields between the 1030/// two. 1031/// 1032class ExtQualsTypeCommonBase { 1033 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1034 : BaseType(baseType), CanonicalType(canon) {} 1035 1036 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1037 /// a self-referential pointer (for \c Type). 1038 /// 1039 /// This pointer allows an efficient mapping from a QualType to its 1040 /// underlying type pointer. 1041 const Type *const BaseType; 1042 1043 /// \brief The canonical type of this type. A QualType. 1044 QualType CanonicalType; 1045 1046 friend class QualType; 1047 friend class Type; 1048 friend class ExtQuals; 1049}; 1050 1051/// ExtQuals - We can encode up to four bits in the low bits of a 1052/// type pointer, but there are many more type qualifiers that we want 1053/// to be able to apply to an arbitrary type. Therefore we have this 1054/// struct, intended to be heap-allocated and used by QualType to 1055/// store qualifiers. 1056/// 1057/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1058/// in three low bits on the QualType pointer; a fourth bit records whether 1059/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1060/// Objective-C GC attributes) are much more rare. 1061class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1062 // NOTE: changing the fast qualifiers should be straightforward as 1063 // long as you don't make 'const' non-fast. 1064 // 1. Qualifiers: 1065 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1066 // Fast qualifiers must occupy the low-order bits. 1067 // b) Update Qualifiers::FastWidth and FastMask. 1068 // 2. QualType: 1069 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1070 // b) Update remove{Volatile,Restrict}, defined near the end of 1071 // this header. 1072 // 3. ASTContext: 1073 // a) Update get{Volatile,Restrict}Type. 1074 1075 /// Quals - the immutable set of qualifiers applied by this 1076 /// node; always contains extended qualifiers. 1077 Qualifiers Quals; 1078 1079 ExtQuals *this_() { return this; } 1080 1081public: 1082 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1083 : ExtQualsTypeCommonBase(baseType, 1084 canon.isNull() ? QualType(this_(), 0) : canon), 1085 Quals(quals) 1086 { 1087 assert(Quals.hasNonFastQualifiers() 1088 && "ExtQuals created with no fast qualifiers"); 1089 assert(!Quals.hasFastQualifiers() 1090 && "ExtQuals created with fast qualifiers"); 1091 } 1092 1093 Qualifiers getQualifiers() const { return Quals; } 1094 1095 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1096 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1097 1098 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1099 Qualifiers::ObjCLifetime getObjCLifetime() const { 1100 return Quals.getObjCLifetime(); 1101 } 1102 1103 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1104 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1105 1106 const Type *getBaseType() const { return BaseType; } 1107 1108public: 1109 void Profile(llvm::FoldingSetNodeID &ID) const { 1110 Profile(ID, getBaseType(), Quals); 1111 } 1112 static void Profile(llvm::FoldingSetNodeID &ID, 1113 const Type *BaseType, 1114 Qualifiers Quals) { 1115 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1116 ID.AddPointer(BaseType); 1117 Quals.Profile(ID); 1118 } 1119}; 1120 1121/// \brief The kind of C++0x ref-qualifier associated with a function type, 1122/// which determines whether a member function's "this" object can be an 1123/// lvalue, rvalue, or neither. 1124enum RefQualifierKind { 1125 /// \brief No ref-qualifier was provided. 1126 RQ_None = 0, 1127 /// \brief An lvalue ref-qualifier was provided (\c &). 1128 RQ_LValue, 1129 /// \brief An rvalue ref-qualifier was provided (\c &&). 1130 RQ_RValue 1131}; 1132 1133/// Type - This is the base class of the type hierarchy. A central concept 1134/// with types is that each type always has a canonical type. A canonical type 1135/// is the type with any typedef names stripped out of it or the types it 1136/// references. For example, consider: 1137/// 1138/// typedef int foo; 1139/// typedef foo* bar; 1140/// 'int *' 'foo *' 'bar' 1141/// 1142/// There will be a Type object created for 'int'. Since int is canonical, its 1143/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1144/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1145/// there is a PointerType that represents 'int*', which, like 'int', is 1146/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1147/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1148/// is also 'int*'. 1149/// 1150/// Non-canonical types are useful for emitting diagnostics, without losing 1151/// information about typedefs being used. Canonical types are useful for type 1152/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1153/// about whether something has a particular form (e.g. is a function type), 1154/// because they implicitly, recursively, strip all typedefs out of a type. 1155/// 1156/// Types, once created, are immutable. 1157/// 1158class Type : public ExtQualsTypeCommonBase { 1159public: 1160 enum TypeClass { 1161#define TYPE(Class, Base) Class, 1162#define LAST_TYPE(Class) TypeLast = Class, 1163#define ABSTRACT_TYPE(Class, Base) 1164#include "clang/AST/TypeNodes.def" 1165 TagFirst = Record, TagLast = Enum 1166 }; 1167 1168private: 1169 Type(const Type &) LLVM_DELETED_FUNCTION; 1170 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1171 1172 /// Bitfields required by the Type class. 1173 class TypeBitfields { 1174 friend class Type; 1175 template <class T> friend class TypePropertyCache; 1176 1177 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1178 unsigned TC : 8; 1179 1180 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1181 unsigned Dependent : 1; 1182 1183 /// \brief Whether this type somehow involves a template parameter, even 1184 /// if the resolution of the type does not depend on a template parameter. 1185 unsigned InstantiationDependent : 1; 1186 1187 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1188 unsigned VariablyModified : 1; 1189 1190 /// \brief Whether this type contains an unexpanded parameter pack 1191 /// (for C++0x variadic templates). 1192 unsigned ContainsUnexpandedParameterPack : 1; 1193 1194 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1195 /// with 'Cache') is valid. If so, then this is a 1196 /// LangOptions::VisibilityMode+1. 1197 mutable unsigned CacheValidAndVisibility : 2; 1198 1199 /// \brief True if the visibility was set explicitly in the source code. 1200 mutable unsigned CachedExplicitVisibility : 1; 1201 1202 /// \brief Linkage of this type. 1203 mutable unsigned CachedLinkage : 2; 1204 1205 /// \brief Whether this type involves and local or unnamed types. 1206 mutable unsigned CachedLocalOrUnnamed : 1; 1207 1208 /// \brief FromAST - Whether this type comes from an AST file. 1209 mutable unsigned FromAST : 1; 1210 1211 bool isCacheValid() const { 1212 return (CacheValidAndVisibility != 0); 1213 } 1214 Visibility getVisibility() const { 1215 assert(isCacheValid() && "getting linkage from invalid cache"); 1216 return static_cast<Visibility>(CacheValidAndVisibility-1); 1217 } 1218 bool isVisibilityExplicit() const { 1219 assert(isCacheValid() && "getting linkage from invalid cache"); 1220 return CachedExplicitVisibility; 1221 } 1222 Linkage getLinkage() const { 1223 assert(isCacheValid() && "getting linkage from invalid cache"); 1224 return static_cast<Linkage>(CachedLinkage); 1225 } 1226 bool hasLocalOrUnnamedType() const { 1227 assert(isCacheValid() && "getting linkage from invalid cache"); 1228 return CachedLocalOrUnnamed; 1229 } 1230 }; 1231 enum { NumTypeBits = 19 }; 1232 1233protected: 1234 // These classes allow subclasses to somewhat cleanly pack bitfields 1235 // into Type. 1236 1237 class ArrayTypeBitfields { 1238 friend class ArrayType; 1239 1240 unsigned : NumTypeBits; 1241 1242 /// IndexTypeQuals - CVR qualifiers from declarations like 1243 /// 'int X[static restrict 4]'. For function parameters only. 1244 unsigned IndexTypeQuals : 3; 1245 1246 /// SizeModifier - storage class qualifiers from declarations like 1247 /// 'int X[static restrict 4]'. For function parameters only. 1248 /// Actually an ArrayType::ArraySizeModifier. 1249 unsigned SizeModifier : 3; 1250 }; 1251 1252 class BuiltinTypeBitfields { 1253 friend class BuiltinType; 1254 1255 unsigned : NumTypeBits; 1256 1257 /// The kind (BuiltinType::Kind) of builtin type this is. 1258 unsigned Kind : 8; 1259 }; 1260 1261 class FunctionTypeBitfields { 1262 friend class FunctionType; 1263 1264 unsigned : NumTypeBits; 1265 1266 /// Extra information which affects how the function is called, like 1267 /// regparm and the calling convention. 1268 unsigned ExtInfo : 9; 1269 1270 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1271 /// other bitfields. 1272 /// The qualifiers are part of FunctionProtoType because... 1273 /// 1274 /// C++ 8.3.5p4: The return type, the parameter type list and the 1275 /// cv-qualifier-seq, [...], are part of the function type. 1276 unsigned TypeQuals : 3; 1277 }; 1278 1279 class ObjCObjectTypeBitfields { 1280 friend class ObjCObjectType; 1281 1282 unsigned : NumTypeBits; 1283 1284 /// NumProtocols - The number of protocols stored directly on this 1285 /// object type. 1286 unsigned NumProtocols : 32 - NumTypeBits; 1287 }; 1288 1289 class ReferenceTypeBitfields { 1290 friend class ReferenceType; 1291 1292 unsigned : NumTypeBits; 1293 1294 /// True if the type was originally spelled with an lvalue sigil. 1295 /// This is never true of rvalue references but can also be false 1296 /// on lvalue references because of C++0x [dcl.typedef]p9, 1297 /// as follows: 1298 /// 1299 /// typedef int &ref; // lvalue, spelled lvalue 1300 /// typedef int &&rvref; // rvalue 1301 /// ref &a; // lvalue, inner ref, spelled lvalue 1302 /// ref &&a; // lvalue, inner ref 1303 /// rvref &a; // lvalue, inner ref, spelled lvalue 1304 /// rvref &&a; // rvalue, inner ref 1305 unsigned SpelledAsLValue : 1; 1306 1307 /// True if the inner type is a reference type. This only happens 1308 /// in non-canonical forms. 1309 unsigned InnerRef : 1; 1310 }; 1311 1312 class TypeWithKeywordBitfields { 1313 friend class TypeWithKeyword; 1314 1315 unsigned : NumTypeBits; 1316 1317 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1318 unsigned Keyword : 8; 1319 }; 1320 1321 class VectorTypeBitfields { 1322 friend class VectorType; 1323 1324 unsigned : NumTypeBits; 1325 1326 /// VecKind - The kind of vector, either a generic vector type or some 1327 /// target-specific vector type such as for AltiVec or Neon. 1328 unsigned VecKind : 3; 1329 1330 /// NumElements - The number of elements in the vector. 1331 unsigned NumElements : 29 - NumTypeBits; 1332 }; 1333 1334 class AttributedTypeBitfields { 1335 friend class AttributedType; 1336 1337 unsigned : NumTypeBits; 1338 1339 /// AttrKind - an AttributedType::Kind 1340 unsigned AttrKind : 32 - NumTypeBits; 1341 }; 1342 1343 union { 1344 TypeBitfields TypeBits; 1345 ArrayTypeBitfields ArrayTypeBits; 1346 AttributedTypeBitfields AttributedTypeBits; 1347 BuiltinTypeBitfields BuiltinTypeBits; 1348 FunctionTypeBitfields FunctionTypeBits; 1349 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1350 ReferenceTypeBitfields ReferenceTypeBits; 1351 TypeWithKeywordBitfields TypeWithKeywordBits; 1352 VectorTypeBitfields VectorTypeBits; 1353 }; 1354 1355private: 1356 /// \brief Set whether this type comes from an AST file. 1357 void setFromAST(bool V = true) const { 1358 TypeBits.FromAST = V; 1359 } 1360 1361 template <class T> friend class TypePropertyCache; 1362 1363protected: 1364 // silence VC++ warning C4355: 'this' : used in base member initializer list 1365 Type *this_() { return this; } 1366 Type(TypeClass tc, QualType canon, bool Dependent, 1367 bool InstantiationDependent, bool VariablyModified, 1368 bool ContainsUnexpandedParameterPack) 1369 : ExtQualsTypeCommonBase(this, 1370 canon.isNull() ? QualType(this_(), 0) : canon) { 1371 TypeBits.TC = tc; 1372 TypeBits.Dependent = Dependent; 1373 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1374 TypeBits.VariablyModified = VariablyModified; 1375 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1376 TypeBits.CacheValidAndVisibility = 0; 1377 TypeBits.CachedExplicitVisibility = false; 1378 TypeBits.CachedLocalOrUnnamed = false; 1379 TypeBits.CachedLinkage = NoLinkage; 1380 TypeBits.FromAST = false; 1381 } 1382 friend class ASTContext; 1383 1384 void setDependent(bool D = true) { 1385 TypeBits.Dependent = D; 1386 if (D) 1387 TypeBits.InstantiationDependent = true; 1388 } 1389 void setInstantiationDependent(bool D = true) { 1390 TypeBits.InstantiationDependent = D; } 1391 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1392 } 1393 void setContainsUnexpandedParameterPack(bool PP = true) { 1394 TypeBits.ContainsUnexpandedParameterPack = PP; 1395 } 1396 1397public: 1398 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1399 1400 /// \brief Whether this type comes from an AST file. 1401 bool isFromAST() const { return TypeBits.FromAST; } 1402 1403 /// \brief Whether this type is or contains an unexpanded parameter 1404 /// pack, used to support C++0x variadic templates. 1405 /// 1406 /// A type that contains a parameter pack shall be expanded by the 1407 /// ellipsis operator at some point. For example, the typedef in the 1408 /// following example contains an unexpanded parameter pack 'T': 1409 /// 1410 /// \code 1411 /// template<typename ...T> 1412 /// struct X { 1413 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1414 /// }; 1415 /// \endcode 1416 /// 1417 /// Note that this routine does not specify which 1418 bool containsUnexpandedParameterPack() const { 1419 return TypeBits.ContainsUnexpandedParameterPack; 1420 } 1421 1422 /// Determines if this type would be canonical if it had no further 1423 /// qualification. 1424 bool isCanonicalUnqualified() const { 1425 return CanonicalType == QualType(this, 0); 1426 } 1427 1428 /// Pull a single level of sugar off of this locally-unqualified type. 1429 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1430 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1431 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1432 1433 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1434 /// object types, function types, and incomplete types. 1435 1436 /// isIncompleteType - Return true if this is an incomplete type. 1437 /// A type that can describe objects, but which lacks information needed to 1438 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1439 /// routine will need to determine if the size is actually required. 1440 /// 1441 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1442 /// that can be completed (such as a C struct, C++ class, or Objective-C 1443 /// class), will be set to the declaration. 1444 bool isIncompleteType(NamedDecl **Def = 0) const; 1445 1446 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1447 /// type, in other words, not a function type. 1448 bool isIncompleteOrObjectType() const { 1449 return !isFunctionType(); 1450 } 1451 1452 /// \brief Determine whether this type is an object type. 1453 bool isObjectType() const { 1454 // C++ [basic.types]p8: 1455 // An object type is a (possibly cv-qualified) type that is not a 1456 // function type, not a reference type, and not a void type. 1457 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1458 } 1459 1460 /// isLiteralType - Return true if this is a literal type 1461 /// (C++0x [basic.types]p10) 1462 bool isLiteralType() const; 1463 1464 /// \brief Test if this type is a standard-layout type. 1465 /// (C++0x [basic.type]p9) 1466 bool isStandardLayoutType() const; 1467 1468 /// Helper methods to distinguish type categories. All type predicates 1469 /// operate on the canonical type, ignoring typedefs and qualifiers. 1470 1471 /// isBuiltinType - returns true if the type is a builtin type. 1472 bool isBuiltinType() const; 1473 1474 /// isSpecificBuiltinType - Test for a particular builtin type. 1475 bool isSpecificBuiltinType(unsigned K) const; 1476 1477 /// isPlaceholderType - Test for a type which does not represent an 1478 /// actual type-system type but is instead used as a placeholder for 1479 /// various convenient purposes within Clang. All such types are 1480 /// BuiltinTypes. 1481 bool isPlaceholderType() const; 1482 const BuiltinType *getAsPlaceholderType() const; 1483 1484 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1485 bool isSpecificPlaceholderType(unsigned K) const; 1486 1487 /// isNonOverloadPlaceholderType - Test for a placeholder type 1488 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1489 bool isNonOverloadPlaceholderType() const; 1490 1491 /// isIntegerType() does *not* include complex integers (a GCC extension). 1492 /// isComplexIntegerType() can be used to test for complex integers. 1493 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1494 bool isEnumeralType() const; 1495 bool isBooleanType() const; 1496 bool isCharType() const; 1497 bool isWideCharType() const; 1498 bool isChar16Type() const; 1499 bool isChar32Type() const; 1500 bool isAnyCharacterType() const; 1501 bool isIntegralType(ASTContext &Ctx) const; 1502 1503 /// \brief Determine whether this type is an integral or enumeration type. 1504 bool isIntegralOrEnumerationType() const; 1505 /// \brief Determine whether this type is an integral or unscoped enumeration 1506 /// type. 1507 bool isIntegralOrUnscopedEnumerationType() const; 1508 1509 /// Floating point categories. 1510 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1511 /// isComplexType() does *not* include complex integers (a GCC extension). 1512 /// isComplexIntegerType() can be used to test for complex integers. 1513 bool isComplexType() const; // C99 6.2.5p11 (complex) 1514 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1515 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1516 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1517 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1518 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1519 bool isVoidType() const; // C99 6.2.5p19 1520 bool isDerivedType() const; // C99 6.2.5p20 1521 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1522 bool isAggregateType() const; 1523 bool isFundamentalType() const; 1524 bool isCompoundType() const; 1525 1526 // Type Predicates: Check to see if this type is structurally the specified 1527 // type, ignoring typedefs and qualifiers. 1528 bool isFunctionType() const; 1529 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1530 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1531 bool isPointerType() const; 1532 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1533 bool isBlockPointerType() const; 1534 bool isVoidPointerType() const; 1535 bool isReferenceType() const; 1536 bool isLValueReferenceType() const; 1537 bool isRValueReferenceType() const; 1538 bool isFunctionPointerType() const; 1539 bool isMemberPointerType() const; 1540 bool isMemberFunctionPointerType() const; 1541 bool isMemberDataPointerType() const; 1542 bool isArrayType() const; 1543 bool isConstantArrayType() const; 1544 bool isIncompleteArrayType() const; 1545 bool isVariableArrayType() const; 1546 bool isDependentSizedArrayType() const; 1547 bool isRecordType() const; 1548 bool isClassType() const; 1549 bool isStructureType() const; 1550 bool isInterfaceType() const; 1551 bool isStructureOrClassType() const; 1552 bool isUnionType() const; 1553 bool isComplexIntegerType() const; // GCC _Complex integer type. 1554 bool isVectorType() const; // GCC vector type. 1555 bool isExtVectorType() const; // Extended vector type. 1556 bool isObjCObjectPointerType() const; // pointer to ObjC object 1557 bool isObjCRetainableType() const; // ObjC object or block pointer 1558 bool isObjCLifetimeType() const; // (array of)* retainable type 1559 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1560 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1561 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1562 // for the common case. 1563 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1564 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1565 bool isObjCQualifiedIdType() const; // id<foo> 1566 bool isObjCQualifiedClassType() const; // Class<foo> 1567 bool isObjCObjectOrInterfaceType() const; 1568 bool isObjCIdType() const; // id 1569 bool isObjCClassType() const; // Class 1570 bool isObjCSelType() const; // Class 1571 bool isObjCBuiltinType() const; // 'id' or 'Class' 1572 bool isObjCARCBridgableType() const; 1573 bool isCARCBridgableType() const; 1574 bool isTemplateTypeParmType() const; // C++ template type parameter 1575 bool isNullPtrType() const; // C++0x nullptr_t 1576 bool isAtomicType() const; // C11 _Atomic() 1577 1578 bool isImage1dT() const; // OpenCL image1d_t 1579 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1580 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1581 bool isImage2dT() const; // OpenCL image2d_t 1582 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1583 bool isImage3dT() const; // OpenCL image3d_t 1584 1585 bool isImageType() const; // Any OpenCL image type 1586 1587 bool isEventT() const; // OpenCL event_t 1588 1589 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1590 1591 /// Determines if this type, which must satisfy 1592 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1593 /// than implicitly __strong. 1594 bool isObjCARCImplicitlyUnretainedType() const; 1595 1596 /// Return the implicit lifetime for this type, which must not be dependent. 1597 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1598 1599 enum ScalarTypeKind { 1600 STK_CPointer, 1601 STK_BlockPointer, 1602 STK_ObjCObjectPointer, 1603 STK_MemberPointer, 1604 STK_Bool, 1605 STK_Integral, 1606 STK_Floating, 1607 STK_IntegralComplex, 1608 STK_FloatingComplex 1609 }; 1610 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1611 ScalarTypeKind getScalarTypeKind() const; 1612 1613 /// isDependentType - Whether this type is a dependent type, meaning 1614 /// that its definition somehow depends on a template parameter 1615 /// (C++ [temp.dep.type]). 1616 bool isDependentType() const { return TypeBits.Dependent; } 1617 1618 /// \brief Determine whether this type is an instantiation-dependent type, 1619 /// meaning that the type involves a template parameter (even if the 1620 /// definition does not actually depend on the type substituted for that 1621 /// template parameter). 1622 bool isInstantiationDependentType() const { 1623 return TypeBits.InstantiationDependent; 1624 } 1625 1626 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1627 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1628 1629 /// \brief Whether this type involves a variable-length array type 1630 /// with a definite size. 1631 bool hasSizedVLAType() const; 1632 1633 /// \brief Whether this type is or contains a local or unnamed type. 1634 bool hasUnnamedOrLocalType() const; 1635 1636 bool isOverloadableType() const; 1637 1638 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1639 bool isElaboratedTypeSpecifier() const; 1640 1641 bool canDecayToPointerType() const; 1642 1643 /// hasPointerRepresentation - Whether this type is represented 1644 /// natively as a pointer; this includes pointers, references, block 1645 /// pointers, and Objective-C interface, qualified id, and qualified 1646 /// interface types, as well as nullptr_t. 1647 bool hasPointerRepresentation() const; 1648 1649 /// hasObjCPointerRepresentation - Whether this type can represent 1650 /// an objective pointer type for the purpose of GC'ability 1651 bool hasObjCPointerRepresentation() const; 1652 1653 /// \brief Determine whether this type has an integer representation 1654 /// of some sort, e.g., it is an integer type or a vector. 1655 bool hasIntegerRepresentation() const; 1656 1657 /// \brief Determine whether this type has an signed integer representation 1658 /// of some sort, e.g., it is an signed integer type or a vector. 1659 bool hasSignedIntegerRepresentation() const; 1660 1661 /// \brief Determine whether this type has an unsigned integer representation 1662 /// of some sort, e.g., it is an unsigned integer type or a vector. 1663 bool hasUnsignedIntegerRepresentation() const; 1664 1665 /// \brief Determine whether this type has a floating-point representation 1666 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1667 bool hasFloatingRepresentation() const; 1668 1669 // Type Checking Functions: Check to see if this type is structurally the 1670 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1671 // the best type we can. 1672 const RecordType *getAsStructureType() const; 1673 /// NOTE: getAs*ArrayType are methods on ASTContext. 1674 const RecordType *getAsUnionType() const; 1675 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1676 // The following is a convenience method that returns an ObjCObjectPointerType 1677 // for object declared using an interface. 1678 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1679 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1680 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1681 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1682 1683 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1684 /// because the type is a RecordType or because it is the injected-class-name 1685 /// type of a class template or class template partial specialization. 1686 CXXRecordDecl *getAsCXXRecordDecl() const; 1687 1688 /// If this is a pointer or reference to a RecordType, return the 1689 /// CXXRecordDecl that that type refers to. 1690 /// 1691 /// If this is not a pointer or reference, or the type being pointed to does 1692 /// not refer to a CXXRecordDecl, returns NULL. 1693 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1694 1695 /// \brief Get the AutoType whose type will be deduced for a variable with 1696 /// an initializer of this type. This looks through declarators like pointer 1697 /// types, but not through decltype or typedefs. 1698 AutoType *getContainedAutoType() const; 1699 1700 /// Member-template getAs<specific type>'. Look through sugar for 1701 /// an instance of \<specific type>. This scheme will eventually 1702 /// replace the specific getAsXXXX methods above. 1703 /// 1704 /// There are some specializations of this member template listed 1705 /// immediately following this class. 1706 template <typename T> const T *getAs() const; 1707 1708 /// A variant of getAs<> for array types which silently discards 1709 /// qualifiers from the outermost type. 1710 const ArrayType *getAsArrayTypeUnsafe() const; 1711 1712 /// Member-template castAs<specific type>. Look through sugar for 1713 /// the underlying instance of \<specific type>. 1714 /// 1715 /// This method has the same relationship to getAs<T> as cast<T> has 1716 /// to dyn_cast<T>; which is to say, the underlying type *must* 1717 /// have the intended type, and this method will never return null. 1718 template <typename T> const T *castAs() const; 1719 1720 /// A variant of castAs<> for array type which silently discards 1721 /// qualifiers from the outermost type. 1722 const ArrayType *castAsArrayTypeUnsafe() const; 1723 1724 /// getBaseElementTypeUnsafe - Get the base element type of this 1725 /// type, potentially discarding type qualifiers. This method 1726 /// should never be used when type qualifiers are meaningful. 1727 const Type *getBaseElementTypeUnsafe() const; 1728 1729 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1730 /// element type of the array, potentially with type qualifiers missing. 1731 /// This method should never be used when type qualifiers are meaningful. 1732 const Type *getArrayElementTypeNoTypeQual() const; 1733 1734 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1735 /// pointer, this returns the respective pointee. 1736 QualType getPointeeType() const; 1737 1738 /// getUnqualifiedDesugaredType() - Return the specified type with 1739 /// any "sugar" removed from the type, removing any typedefs, 1740 /// typeofs, etc., as well as any qualifiers. 1741 const Type *getUnqualifiedDesugaredType() const; 1742 1743 /// More type predicates useful for type checking/promotion 1744 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1745 1746 /// isSignedIntegerType - Return true if this is an integer type that is 1747 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1748 /// or an enum decl which has a signed representation. 1749 bool isSignedIntegerType() const; 1750 1751 /// isUnsignedIntegerType - Return true if this is an integer type that is 1752 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1753 /// or an enum decl which has an unsigned representation. 1754 bool isUnsignedIntegerType() const; 1755 1756 /// Determines whether this is an integer type that is signed or an 1757 /// enumeration types whose underlying type is a signed integer type. 1758 bool isSignedIntegerOrEnumerationType() const; 1759 1760 /// Determines whether this is an integer type that is unsigned or an 1761 /// enumeration types whose underlying type is a unsigned integer type. 1762 bool isUnsignedIntegerOrEnumerationType() const; 1763 1764 /// isConstantSizeType - Return true if this is not a variable sized type, 1765 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1766 /// incomplete types. 1767 bool isConstantSizeType() const; 1768 1769 /// isSpecifierType - Returns true if this type can be represented by some 1770 /// set of type specifiers. 1771 bool isSpecifierType() const; 1772 1773 /// \brief Determine the linkage of this type. 1774 Linkage getLinkage() const; 1775 1776 /// \brief Determine the visibility of this type. 1777 Visibility getVisibility() const; 1778 1779 /// \brief Return true if the visibility was explicitly set is the code. 1780 bool isVisibilityExplicit() const; 1781 1782 /// \brief Determine the linkage and visibility of this type. 1783 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1784 1785 /// \brief Note that the linkage is no longer known. 1786 void ClearLinkageCache(); 1787 1788 const char *getTypeClassName() const; 1789 1790 QualType getCanonicalTypeInternal() const { 1791 return CanonicalType; 1792 } 1793 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1794 LLVM_ATTRIBUTE_USED void dump() const; 1795 1796 friend class ASTReader; 1797 friend class ASTWriter; 1798}; 1799 1800/// \brief This will check for a TypedefType by removing any existing sugar 1801/// until it reaches a TypedefType or a non-sugared type. 1802template <> const TypedefType *Type::getAs() const; 1803 1804/// \brief This will check for a TemplateSpecializationType by removing any 1805/// existing sugar until it reaches a TemplateSpecializationType or a 1806/// non-sugared type. 1807template <> const TemplateSpecializationType *Type::getAs() const; 1808 1809// We can do canonical leaf types faster, because we don't have to 1810// worry about preserving child type decoration. 1811#define TYPE(Class, Base) 1812#define LEAF_TYPE(Class) \ 1813template <> inline const Class##Type *Type::getAs() const { \ 1814 return dyn_cast<Class##Type>(CanonicalType); \ 1815} \ 1816template <> inline const Class##Type *Type::castAs() const { \ 1817 return cast<Class##Type>(CanonicalType); \ 1818} 1819#include "clang/AST/TypeNodes.def" 1820 1821 1822/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1823/// types are always canonical and have a literal name field. 1824class BuiltinType : public Type { 1825public: 1826 enum Kind { 1827#define BUILTIN_TYPE(Id, SingletonId) Id, 1828#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1829#include "clang/AST/BuiltinTypes.def" 1830 }; 1831 1832public: 1833 BuiltinType(Kind K) 1834 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1835 /*InstantiationDependent=*/(K == Dependent), 1836 /*VariablyModified=*/false, 1837 /*Unexpanded paramter pack=*/false) { 1838 BuiltinTypeBits.Kind = K; 1839 } 1840 1841 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1842 StringRef getName(const PrintingPolicy &Policy) const; 1843 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1844 // The StringRef is null-terminated. 1845 StringRef str = getName(Policy); 1846 assert(!str.empty() && str.data()[str.size()] == '\0'); 1847 return str.data(); 1848 } 1849 1850 bool isSugared() const { return false; } 1851 QualType desugar() const { return QualType(this, 0); } 1852 1853 bool isInteger() const { 1854 return getKind() >= Bool && getKind() <= Int128; 1855 } 1856 1857 bool isSignedInteger() const { 1858 return getKind() >= Char_S && getKind() <= Int128; 1859 } 1860 1861 bool isUnsignedInteger() const { 1862 return getKind() >= Bool && getKind() <= UInt128; 1863 } 1864 1865 bool isFloatingPoint() const { 1866 return getKind() >= Half && getKind() <= LongDouble; 1867 } 1868 1869 /// Determines whether the given kind corresponds to a placeholder type. 1870 static bool isPlaceholderTypeKind(Kind K) { 1871 return K >= Overload; 1872 } 1873 1874 /// Determines whether this type is a placeholder type, i.e. a type 1875 /// which cannot appear in arbitrary positions in a fully-formed 1876 /// expression. 1877 bool isPlaceholderType() const { 1878 return isPlaceholderTypeKind(getKind()); 1879 } 1880 1881 /// Determines whether this type is a placeholder type other than 1882 /// Overload. Most placeholder types require only syntactic 1883 /// information about their context in order to be resolved (e.g. 1884 /// whether it is a call expression), which means they can (and 1885 /// should) be resolved in an earlier "phase" of analysis. 1886 /// Overload expressions sometimes pick up further information 1887 /// from their context, like whether the context expects a 1888 /// specific function-pointer type, and so frequently need 1889 /// special treatment. 1890 bool isNonOverloadPlaceholderType() const { 1891 return getKind() > Overload; 1892 } 1893 1894 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1895}; 1896 1897/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1898/// types (_Complex float etc) as well as the GCC integer complex extensions. 1899/// 1900class ComplexType : public Type, public llvm::FoldingSetNode { 1901 QualType ElementType; 1902 ComplexType(QualType Element, QualType CanonicalPtr) : 1903 Type(Complex, CanonicalPtr, Element->isDependentType(), 1904 Element->isInstantiationDependentType(), 1905 Element->isVariablyModifiedType(), 1906 Element->containsUnexpandedParameterPack()), 1907 ElementType(Element) { 1908 } 1909 friend class ASTContext; // ASTContext creates these. 1910 1911public: 1912 QualType getElementType() const { return ElementType; } 1913 1914 bool isSugared() const { return false; } 1915 QualType desugar() const { return QualType(this, 0); } 1916 1917 void Profile(llvm::FoldingSetNodeID &ID) { 1918 Profile(ID, getElementType()); 1919 } 1920 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1921 ID.AddPointer(Element.getAsOpaquePtr()); 1922 } 1923 1924 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1925}; 1926 1927/// ParenType - Sugar for parentheses used when specifying types. 1928/// 1929class ParenType : public Type, public llvm::FoldingSetNode { 1930 QualType Inner; 1931 1932 ParenType(QualType InnerType, QualType CanonType) : 1933 Type(Paren, CanonType, InnerType->isDependentType(), 1934 InnerType->isInstantiationDependentType(), 1935 InnerType->isVariablyModifiedType(), 1936 InnerType->containsUnexpandedParameterPack()), 1937 Inner(InnerType) { 1938 } 1939 friend class ASTContext; // ASTContext creates these. 1940 1941public: 1942 1943 QualType getInnerType() const { return Inner; } 1944 1945 bool isSugared() const { return true; } 1946 QualType desugar() const { return getInnerType(); } 1947 1948 void Profile(llvm::FoldingSetNodeID &ID) { 1949 Profile(ID, getInnerType()); 1950 } 1951 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1952 Inner.Profile(ID); 1953 } 1954 1955 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1956}; 1957 1958/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1959/// 1960class PointerType : public Type, public llvm::FoldingSetNode { 1961 QualType PointeeType; 1962 1963 PointerType(QualType Pointee, QualType CanonicalPtr) : 1964 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1965 Pointee->isInstantiationDependentType(), 1966 Pointee->isVariablyModifiedType(), 1967 Pointee->containsUnexpandedParameterPack()), 1968 PointeeType(Pointee) { 1969 } 1970 friend class ASTContext; // ASTContext creates these. 1971 1972public: 1973 1974 QualType getPointeeType() const { return PointeeType; } 1975 1976 bool isSugared() const { return false; } 1977 QualType desugar() const { return QualType(this, 0); } 1978 1979 void Profile(llvm::FoldingSetNodeID &ID) { 1980 Profile(ID, getPointeeType()); 1981 } 1982 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1983 ID.AddPointer(Pointee.getAsOpaquePtr()); 1984 } 1985 1986 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1987}; 1988 1989/// BlockPointerType - pointer to a block type. 1990/// This type is to represent types syntactically represented as 1991/// "void (^)(int)", etc. Pointee is required to always be a function type. 1992/// 1993class BlockPointerType : public Type, public llvm::FoldingSetNode { 1994 QualType PointeeType; // Block is some kind of pointer type 1995 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1996 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1997 Pointee->isInstantiationDependentType(), 1998 Pointee->isVariablyModifiedType(), 1999 Pointee->containsUnexpandedParameterPack()), 2000 PointeeType(Pointee) { 2001 } 2002 friend class ASTContext; // ASTContext creates these. 2003 2004public: 2005 2006 // Get the pointee type. Pointee is required to always be a function type. 2007 QualType getPointeeType() const { return PointeeType; } 2008 2009 bool isSugared() const { return false; } 2010 QualType desugar() const { return QualType(this, 0); } 2011 2012 void Profile(llvm::FoldingSetNodeID &ID) { 2013 Profile(ID, getPointeeType()); 2014 } 2015 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2016 ID.AddPointer(Pointee.getAsOpaquePtr()); 2017 } 2018 2019 static bool classof(const Type *T) { 2020 return T->getTypeClass() == BlockPointer; 2021 } 2022}; 2023 2024/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2025/// 2026class ReferenceType : public Type, public llvm::FoldingSetNode { 2027 QualType PointeeType; 2028 2029protected: 2030 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2031 bool SpelledAsLValue) : 2032 Type(tc, CanonicalRef, Referencee->isDependentType(), 2033 Referencee->isInstantiationDependentType(), 2034 Referencee->isVariablyModifiedType(), 2035 Referencee->containsUnexpandedParameterPack()), 2036 PointeeType(Referencee) 2037 { 2038 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2039 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2040 } 2041 2042public: 2043 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2044 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2045 2046 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2047 QualType getPointeeType() const { 2048 // FIXME: this might strip inner qualifiers; okay? 2049 const ReferenceType *T = this; 2050 while (T->isInnerRef()) 2051 T = T->PointeeType->castAs<ReferenceType>(); 2052 return T->PointeeType; 2053 } 2054 2055 void Profile(llvm::FoldingSetNodeID &ID) { 2056 Profile(ID, PointeeType, isSpelledAsLValue()); 2057 } 2058 static void Profile(llvm::FoldingSetNodeID &ID, 2059 QualType Referencee, 2060 bool SpelledAsLValue) { 2061 ID.AddPointer(Referencee.getAsOpaquePtr()); 2062 ID.AddBoolean(SpelledAsLValue); 2063 } 2064 2065 static bool classof(const Type *T) { 2066 return T->getTypeClass() == LValueReference || 2067 T->getTypeClass() == RValueReference; 2068 } 2069}; 2070 2071/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2072/// 2073class LValueReferenceType : public ReferenceType { 2074 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2075 bool SpelledAsLValue) : 2076 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2077 {} 2078 friend class ASTContext; // ASTContext creates these 2079public: 2080 bool isSugared() const { return false; } 2081 QualType desugar() const { return QualType(this, 0); } 2082 2083 static bool classof(const Type *T) { 2084 return T->getTypeClass() == LValueReference; 2085 } 2086}; 2087 2088/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2089/// 2090class RValueReferenceType : public ReferenceType { 2091 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2092 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2093 } 2094 friend class ASTContext; // ASTContext creates these 2095public: 2096 bool isSugared() const { return false; } 2097 QualType desugar() const { return QualType(this, 0); } 2098 2099 static bool classof(const Type *T) { 2100 return T->getTypeClass() == RValueReference; 2101 } 2102}; 2103 2104/// MemberPointerType - C++ 8.3.3 - Pointers to members 2105/// 2106class MemberPointerType : public Type, public llvm::FoldingSetNode { 2107 QualType PointeeType; 2108 /// The class of which the pointee is a member. Must ultimately be a 2109 /// RecordType, but could be a typedef or a template parameter too. 2110 const Type *Class; 2111 2112 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2113 Type(MemberPointer, CanonicalPtr, 2114 Cls->isDependentType() || Pointee->isDependentType(), 2115 (Cls->isInstantiationDependentType() || 2116 Pointee->isInstantiationDependentType()), 2117 Pointee->isVariablyModifiedType(), 2118 (Cls->containsUnexpandedParameterPack() || 2119 Pointee->containsUnexpandedParameterPack())), 2120 PointeeType(Pointee), Class(Cls) { 2121 } 2122 friend class ASTContext; // ASTContext creates these. 2123 2124public: 2125 QualType getPointeeType() const { return PointeeType; } 2126 2127 /// Returns true if the member type (i.e. the pointee type) is a 2128 /// function type rather than a data-member type. 2129 bool isMemberFunctionPointer() const { 2130 return PointeeType->isFunctionProtoType(); 2131 } 2132 2133 /// Returns true if the member type (i.e. the pointee type) is a 2134 /// data type rather than a function type. 2135 bool isMemberDataPointer() const { 2136 return !PointeeType->isFunctionProtoType(); 2137 } 2138 2139 const Type *getClass() const { return Class; } 2140 2141 bool isSugared() const { return false; } 2142 QualType desugar() const { return QualType(this, 0); } 2143 2144 void Profile(llvm::FoldingSetNodeID &ID) { 2145 Profile(ID, getPointeeType(), getClass()); 2146 } 2147 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2148 const Type *Class) { 2149 ID.AddPointer(Pointee.getAsOpaquePtr()); 2150 ID.AddPointer(Class); 2151 } 2152 2153 static bool classof(const Type *T) { 2154 return T->getTypeClass() == MemberPointer; 2155 } 2156}; 2157 2158/// ArrayType - C99 6.7.5.2 - Array Declarators. 2159/// 2160class ArrayType : public Type, public llvm::FoldingSetNode { 2161public: 2162 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2163 /// an array with a static size (e.g. int X[static 4]), or an array 2164 /// with a star size (e.g. int X[*]). 2165 /// 'static' is only allowed on function parameters. 2166 enum ArraySizeModifier { 2167 Normal, Static, Star 2168 }; 2169private: 2170 /// ElementType - The element type of the array. 2171 QualType ElementType; 2172 2173protected: 2174 // C++ [temp.dep.type]p1: 2175 // A type is dependent if it is... 2176 // - an array type constructed from any dependent type or whose 2177 // size is specified by a constant expression that is 2178 // value-dependent, 2179 ArrayType(TypeClass tc, QualType et, QualType can, 2180 ArraySizeModifier sm, unsigned tq, 2181 bool ContainsUnexpandedParameterPack) 2182 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2183 et->isInstantiationDependentType() || tc == DependentSizedArray, 2184 (tc == VariableArray || et->isVariablyModifiedType()), 2185 ContainsUnexpandedParameterPack), 2186 ElementType(et) { 2187 ArrayTypeBits.IndexTypeQuals = tq; 2188 ArrayTypeBits.SizeModifier = sm; 2189 } 2190 2191 friend class ASTContext; // ASTContext creates these. 2192 2193public: 2194 QualType getElementType() const { return ElementType; } 2195 ArraySizeModifier getSizeModifier() const { 2196 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2197 } 2198 Qualifiers getIndexTypeQualifiers() const { 2199 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2200 } 2201 unsigned getIndexTypeCVRQualifiers() const { 2202 return ArrayTypeBits.IndexTypeQuals; 2203 } 2204 2205 static bool classof(const Type *T) { 2206 return T->getTypeClass() == ConstantArray || 2207 T->getTypeClass() == VariableArray || 2208 T->getTypeClass() == IncompleteArray || 2209 T->getTypeClass() == DependentSizedArray; 2210 } 2211}; 2212 2213/// ConstantArrayType - This class represents the canonical version of 2214/// C arrays with a specified constant size. For example, the canonical 2215/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2216/// type is 'int' and the size is 404. 2217class ConstantArrayType : public ArrayType { 2218 llvm::APInt Size; // Allows us to unique the type. 2219 2220 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2221 ArraySizeModifier sm, unsigned tq) 2222 : ArrayType(ConstantArray, et, can, sm, tq, 2223 et->containsUnexpandedParameterPack()), 2224 Size(size) {} 2225protected: 2226 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2227 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2228 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2229 Size(size) {} 2230 friend class ASTContext; // ASTContext creates these. 2231public: 2232 const llvm::APInt &getSize() const { return Size; } 2233 bool isSugared() const { return false; } 2234 QualType desugar() const { return QualType(this, 0); } 2235 2236 2237 /// \brief Determine the number of bits required to address a member of 2238 // an array with the given element type and number of elements. 2239 static unsigned getNumAddressingBits(ASTContext &Context, 2240 QualType ElementType, 2241 const llvm::APInt &NumElements); 2242 2243 /// \brief Determine the maximum number of active bits that an array's size 2244 /// can require, which limits the maximum size of the array. 2245 static unsigned getMaxSizeBits(ASTContext &Context); 2246 2247 void Profile(llvm::FoldingSetNodeID &ID) { 2248 Profile(ID, getElementType(), getSize(), 2249 getSizeModifier(), getIndexTypeCVRQualifiers()); 2250 } 2251 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2252 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2253 unsigned TypeQuals) { 2254 ID.AddPointer(ET.getAsOpaquePtr()); 2255 ID.AddInteger(ArraySize.getZExtValue()); 2256 ID.AddInteger(SizeMod); 2257 ID.AddInteger(TypeQuals); 2258 } 2259 static bool classof(const Type *T) { 2260 return T->getTypeClass() == ConstantArray; 2261 } 2262}; 2263 2264/// IncompleteArrayType - This class represents C arrays with an unspecified 2265/// size. For example 'int A[]' has an IncompleteArrayType where the element 2266/// type is 'int' and the size is unspecified. 2267class IncompleteArrayType : public ArrayType { 2268 2269 IncompleteArrayType(QualType et, QualType can, 2270 ArraySizeModifier sm, unsigned tq) 2271 : ArrayType(IncompleteArray, et, can, sm, tq, 2272 et->containsUnexpandedParameterPack()) {} 2273 friend class ASTContext; // ASTContext creates these. 2274public: 2275 bool isSugared() const { return false; } 2276 QualType desugar() const { return QualType(this, 0); } 2277 2278 static bool classof(const Type *T) { 2279 return T->getTypeClass() == IncompleteArray; 2280 } 2281 2282 friend class StmtIteratorBase; 2283 2284 void Profile(llvm::FoldingSetNodeID &ID) { 2285 Profile(ID, getElementType(), getSizeModifier(), 2286 getIndexTypeCVRQualifiers()); 2287 } 2288 2289 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2290 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2291 ID.AddPointer(ET.getAsOpaquePtr()); 2292 ID.AddInteger(SizeMod); 2293 ID.AddInteger(TypeQuals); 2294 } 2295}; 2296 2297/// VariableArrayType - This class represents C arrays with a specified size 2298/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2299/// Since the size expression is an arbitrary expression, we store it as such. 2300/// 2301/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2302/// should not be: two lexically equivalent variable array types could mean 2303/// different things, for example, these variables do not have the same type 2304/// dynamically: 2305/// 2306/// void foo(int x) { 2307/// int Y[x]; 2308/// ++x; 2309/// int Z[x]; 2310/// } 2311/// 2312class VariableArrayType : public ArrayType { 2313 /// SizeExpr - An assignment expression. VLA's are only permitted within 2314 /// a function block. 2315 Stmt *SizeExpr; 2316 /// Brackets - The left and right array brackets. 2317 SourceRange Brackets; 2318 2319 VariableArrayType(QualType et, QualType can, Expr *e, 2320 ArraySizeModifier sm, unsigned tq, 2321 SourceRange brackets) 2322 : ArrayType(VariableArray, et, can, sm, tq, 2323 et->containsUnexpandedParameterPack()), 2324 SizeExpr((Stmt*) e), Brackets(brackets) {} 2325 friend class ASTContext; // ASTContext creates these. 2326 2327public: 2328 Expr *getSizeExpr() const { 2329 // We use C-style casts instead of cast<> here because we do not wish 2330 // to have a dependency of Type.h on Stmt.h/Expr.h. 2331 return (Expr*) SizeExpr; 2332 } 2333 SourceRange getBracketsRange() const { return Brackets; } 2334 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2335 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2336 2337 bool isSugared() const { return false; } 2338 QualType desugar() const { return QualType(this, 0); } 2339 2340 static bool classof(const Type *T) { 2341 return T->getTypeClass() == VariableArray; 2342 } 2343 2344 friend class StmtIteratorBase; 2345 2346 void Profile(llvm::FoldingSetNodeID &ID) { 2347 llvm_unreachable("Cannot unique VariableArrayTypes."); 2348 } 2349}; 2350 2351/// DependentSizedArrayType - This type represents an array type in 2352/// C++ whose size is a value-dependent expression. For example: 2353/// 2354/// \code 2355/// template<typename T, int Size> 2356/// class array { 2357/// T data[Size]; 2358/// }; 2359/// \endcode 2360/// 2361/// For these types, we won't actually know what the array bound is 2362/// until template instantiation occurs, at which point this will 2363/// become either a ConstantArrayType or a VariableArrayType. 2364class DependentSizedArrayType : public ArrayType { 2365 const ASTContext &Context; 2366 2367 /// \brief An assignment expression that will instantiate to the 2368 /// size of the array. 2369 /// 2370 /// The expression itself might be NULL, in which case the array 2371 /// type will have its size deduced from an initializer. 2372 Stmt *SizeExpr; 2373 2374 /// Brackets - The left and right array brackets. 2375 SourceRange Brackets; 2376 2377 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2378 Expr *e, ArraySizeModifier sm, unsigned tq, 2379 SourceRange brackets); 2380 2381 friend class ASTContext; // ASTContext creates these. 2382 2383public: 2384 Expr *getSizeExpr() const { 2385 // We use C-style casts instead of cast<> here because we do not wish 2386 // to have a dependency of Type.h on Stmt.h/Expr.h. 2387 return (Expr*) SizeExpr; 2388 } 2389 SourceRange getBracketsRange() const { return Brackets; } 2390 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2391 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2392 2393 bool isSugared() const { return false; } 2394 QualType desugar() const { return QualType(this, 0); } 2395 2396 static bool classof(const Type *T) { 2397 return T->getTypeClass() == DependentSizedArray; 2398 } 2399 2400 friend class StmtIteratorBase; 2401 2402 2403 void Profile(llvm::FoldingSetNodeID &ID) { 2404 Profile(ID, Context, getElementType(), 2405 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2406 } 2407 2408 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2409 QualType ET, ArraySizeModifier SizeMod, 2410 unsigned TypeQuals, Expr *E); 2411}; 2412 2413/// DependentSizedExtVectorType - This type represent an extended vector type 2414/// where either the type or size is dependent. For example: 2415/// @code 2416/// template<typename T, int Size> 2417/// class vector { 2418/// typedef T __attribute__((ext_vector_type(Size))) type; 2419/// } 2420/// @endcode 2421class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2422 const ASTContext &Context; 2423 Expr *SizeExpr; 2424 /// ElementType - The element type of the array. 2425 QualType ElementType; 2426 SourceLocation loc; 2427 2428 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2429 QualType can, Expr *SizeExpr, SourceLocation loc); 2430 2431 friend class ASTContext; 2432 2433public: 2434 Expr *getSizeExpr() const { return SizeExpr; } 2435 QualType getElementType() const { return ElementType; } 2436 SourceLocation getAttributeLoc() const { return loc; } 2437 2438 bool isSugared() const { return false; } 2439 QualType desugar() const { return QualType(this, 0); } 2440 2441 static bool classof(const Type *T) { 2442 return T->getTypeClass() == DependentSizedExtVector; 2443 } 2444 2445 void Profile(llvm::FoldingSetNodeID &ID) { 2446 Profile(ID, Context, getElementType(), getSizeExpr()); 2447 } 2448 2449 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2450 QualType ElementType, Expr *SizeExpr); 2451}; 2452 2453 2454/// VectorType - GCC generic vector type. This type is created using 2455/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2456/// bytes; or from an Altivec __vector or vector declaration. 2457/// Since the constructor takes the number of vector elements, the 2458/// client is responsible for converting the size into the number of elements. 2459class VectorType : public Type, public llvm::FoldingSetNode { 2460public: 2461 enum VectorKind { 2462 GenericVector, // not a target-specific vector type 2463 AltiVecVector, // is AltiVec vector 2464 AltiVecPixel, // is AltiVec 'vector Pixel' 2465 AltiVecBool, // is AltiVec 'vector bool ...' 2466 NeonVector, // is ARM Neon vector 2467 NeonPolyVector // is ARM Neon polynomial vector 2468 }; 2469protected: 2470 /// ElementType - The element type of the vector. 2471 QualType ElementType; 2472 2473 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2474 VectorKind vecKind); 2475 2476 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2477 QualType canonType, VectorKind vecKind); 2478 2479 friend class ASTContext; // ASTContext creates these. 2480 2481public: 2482 2483 QualType getElementType() const { return ElementType; } 2484 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2485 2486 bool isSugared() const { return false; } 2487 QualType desugar() const { return QualType(this, 0); } 2488 2489 VectorKind getVectorKind() const { 2490 return VectorKind(VectorTypeBits.VecKind); 2491 } 2492 2493 void Profile(llvm::FoldingSetNodeID &ID) { 2494 Profile(ID, getElementType(), getNumElements(), 2495 getTypeClass(), getVectorKind()); 2496 } 2497 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2498 unsigned NumElements, TypeClass TypeClass, 2499 VectorKind VecKind) { 2500 ID.AddPointer(ElementType.getAsOpaquePtr()); 2501 ID.AddInteger(NumElements); 2502 ID.AddInteger(TypeClass); 2503 ID.AddInteger(VecKind); 2504 } 2505 2506 static bool classof(const Type *T) { 2507 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2508 } 2509}; 2510 2511/// ExtVectorType - Extended vector type. This type is created using 2512/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2513/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2514/// class enables syntactic extensions, like Vector Components for accessing 2515/// points, colors, and textures (modeled after OpenGL Shading Language). 2516class ExtVectorType : public VectorType { 2517 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2518 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2519 friend class ASTContext; // ASTContext creates these. 2520public: 2521 static int getPointAccessorIdx(char c) { 2522 switch (c) { 2523 default: return -1; 2524 case 'x': return 0; 2525 case 'y': return 1; 2526 case 'z': return 2; 2527 case 'w': return 3; 2528 } 2529 } 2530 static int getNumericAccessorIdx(char c) { 2531 switch (c) { 2532 default: return -1; 2533 case '0': return 0; 2534 case '1': return 1; 2535 case '2': return 2; 2536 case '3': return 3; 2537 case '4': return 4; 2538 case '5': return 5; 2539 case '6': return 6; 2540 case '7': return 7; 2541 case '8': return 8; 2542 case '9': return 9; 2543 case 'A': 2544 case 'a': return 10; 2545 case 'B': 2546 case 'b': return 11; 2547 case 'C': 2548 case 'c': return 12; 2549 case 'D': 2550 case 'd': return 13; 2551 case 'E': 2552 case 'e': return 14; 2553 case 'F': 2554 case 'f': return 15; 2555 } 2556 } 2557 2558 static int getAccessorIdx(char c) { 2559 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2560 return getNumericAccessorIdx(c); 2561 } 2562 2563 bool isAccessorWithinNumElements(char c) const { 2564 if (int idx = getAccessorIdx(c)+1) 2565 return unsigned(idx-1) < getNumElements(); 2566 return false; 2567 } 2568 bool isSugared() const { return false; } 2569 QualType desugar() const { return QualType(this, 0); } 2570 2571 static bool classof(const Type *T) { 2572 return T->getTypeClass() == ExtVector; 2573 } 2574}; 2575 2576/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2577/// class of FunctionNoProtoType and FunctionProtoType. 2578/// 2579class FunctionType : public Type { 2580 // The type returned by the function. 2581 QualType ResultType; 2582 2583 public: 2584 /// ExtInfo - A class which abstracts out some details necessary for 2585 /// making a call. 2586 /// 2587 /// It is not actually used directly for storing this information in 2588 /// a FunctionType, although FunctionType does currently use the 2589 /// same bit-pattern. 2590 /// 2591 // If you add a field (say Foo), other than the obvious places (both, 2592 // constructors, compile failures), what you need to update is 2593 // * Operator== 2594 // * getFoo 2595 // * withFoo 2596 // * functionType. Add Foo, getFoo. 2597 // * ASTContext::getFooType 2598 // * ASTContext::mergeFunctionTypes 2599 // * FunctionNoProtoType::Profile 2600 // * FunctionProtoType::Profile 2601 // * TypePrinter::PrintFunctionProto 2602 // * AST read and write 2603 // * Codegen 2604 class ExtInfo { 2605 // Feel free to rearrange or add bits, but if you go over 9, 2606 // you'll need to adjust both the Bits field below and 2607 // Type::FunctionTypeBitfields. 2608 2609 // | CC |noreturn|produces|regparm| 2610 // |0 .. 3| 4 | 5 | 6 .. 8| 2611 // 2612 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2613 enum { CallConvMask = 0xF }; 2614 enum { NoReturnMask = 0x10 }; 2615 enum { ProducesResultMask = 0x20 }; 2616 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2617 RegParmOffset = 6 }; // Assumed to be the last field 2618 2619 uint16_t Bits; 2620 2621 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2622 2623 friend class FunctionType; 2624 2625 public: 2626 // Constructor with no defaults. Use this when you know that you 2627 // have all the elements (when reading an AST file for example). 2628 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2629 bool producesResult) { 2630 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2631 Bits = ((unsigned) cc) | 2632 (noReturn ? NoReturnMask : 0) | 2633 (producesResult ? ProducesResultMask : 0) | 2634 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2635 } 2636 2637 // Constructor with all defaults. Use when for example creating a 2638 // function know to use defaults. 2639 ExtInfo() : Bits(0) {} 2640 2641 bool getNoReturn() const { return Bits & NoReturnMask; } 2642 bool getProducesResult() const { return Bits & ProducesResultMask; } 2643 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2644 unsigned getRegParm() const { 2645 unsigned RegParm = Bits >> RegParmOffset; 2646 if (RegParm > 0) 2647 --RegParm; 2648 return RegParm; 2649 } 2650 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2651 2652 bool operator==(ExtInfo Other) const { 2653 return Bits == Other.Bits; 2654 } 2655 bool operator!=(ExtInfo Other) const { 2656 return Bits != Other.Bits; 2657 } 2658 2659 // Note that we don't have setters. That is by design, use 2660 // the following with methods instead of mutating these objects. 2661 2662 ExtInfo withNoReturn(bool noReturn) const { 2663 if (noReturn) 2664 return ExtInfo(Bits | NoReturnMask); 2665 else 2666 return ExtInfo(Bits & ~NoReturnMask); 2667 } 2668 2669 ExtInfo withProducesResult(bool producesResult) const { 2670 if (producesResult) 2671 return ExtInfo(Bits | ProducesResultMask); 2672 else 2673 return ExtInfo(Bits & ~ProducesResultMask); 2674 } 2675 2676 ExtInfo withRegParm(unsigned RegParm) const { 2677 assert(RegParm < 7 && "Invalid regparm value"); 2678 return ExtInfo((Bits & ~RegParmMask) | 2679 ((RegParm + 1) << RegParmOffset)); 2680 } 2681 2682 ExtInfo withCallingConv(CallingConv cc) const { 2683 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2684 } 2685 2686 void Profile(llvm::FoldingSetNodeID &ID) const { 2687 ID.AddInteger(Bits); 2688 } 2689 }; 2690 2691protected: 2692 FunctionType(TypeClass tc, QualType res, 2693 unsigned typeQuals, QualType Canonical, bool Dependent, 2694 bool InstantiationDependent, 2695 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2696 ExtInfo Info) 2697 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2698 ContainsUnexpandedParameterPack), 2699 ResultType(res) { 2700 FunctionTypeBits.ExtInfo = Info.Bits; 2701 FunctionTypeBits.TypeQuals = typeQuals; 2702 } 2703 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2704 2705public: 2706 2707 QualType getResultType() const { return ResultType; } 2708 2709 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2710 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2711 /// \brief Determine whether this function type includes the GNU noreturn 2712 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2713 /// type. 2714 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2715 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2716 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2717 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2718 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2719 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2720 2721 /// \brief Determine the type of an expression that calls a function of 2722 /// this type. 2723 QualType getCallResultType(ASTContext &Context) const { 2724 return getResultType().getNonLValueExprType(Context); 2725 } 2726 2727 static StringRef getNameForCallConv(CallingConv CC); 2728 2729 static bool classof(const Type *T) { 2730 return T->getTypeClass() == FunctionNoProto || 2731 T->getTypeClass() == FunctionProto; 2732 } 2733}; 2734 2735/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2736/// no information available about its arguments. 2737class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2738 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2739 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2740 /*Dependent=*/false, /*InstantiationDependent=*/false, 2741 Result->isVariablyModifiedType(), 2742 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2743 2744 friend class ASTContext; // ASTContext creates these. 2745 2746public: 2747 // No additional state past what FunctionType provides. 2748 2749 bool isSugared() const { return false; } 2750 QualType desugar() const { return QualType(this, 0); } 2751 2752 void Profile(llvm::FoldingSetNodeID &ID) { 2753 Profile(ID, getResultType(), getExtInfo()); 2754 } 2755 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2756 ExtInfo Info) { 2757 Info.Profile(ID); 2758 ID.AddPointer(ResultType.getAsOpaquePtr()); 2759 } 2760 2761 static bool classof(const Type *T) { 2762 return T->getTypeClass() == FunctionNoProto; 2763 } 2764}; 2765 2766/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2767/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2768/// arguments, not as having a single void argument. Such a type can have an 2769/// exception specification, but this specification is not part of the canonical 2770/// type. 2771class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2772public: 2773 /// ExtProtoInfo - Extra information about a function prototype. 2774 struct ExtProtoInfo { 2775 ExtProtoInfo() : 2776 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2777 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2778 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2779 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2780 ConsumedArguments(0) {} 2781 2782 FunctionType::ExtInfo ExtInfo; 2783 bool Variadic : 1; 2784 bool HasTrailingReturn : 1; 2785 unsigned char TypeQuals; 2786 ExceptionSpecificationType ExceptionSpecType; 2787 RefQualifierKind RefQualifier; 2788 unsigned NumExceptions; 2789 const QualType *Exceptions; 2790 Expr *NoexceptExpr; 2791 FunctionDecl *ExceptionSpecDecl; 2792 FunctionDecl *ExceptionSpecTemplate; 2793 const bool *ConsumedArguments; 2794 }; 2795 2796private: 2797 /// \brief Determine whether there are any argument types that 2798 /// contain an unexpanded parameter pack. 2799 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2800 unsigned numArgs) { 2801 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2802 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2803 return true; 2804 2805 return false; 2806 } 2807 2808 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2809 QualType canonical, const ExtProtoInfo &epi); 2810 2811 /// NumArgs - The number of arguments this function has, not counting '...'. 2812 unsigned NumArgs : 15; 2813 2814 /// NumExceptions - The number of types in the exception spec, if any. 2815 unsigned NumExceptions : 9; 2816 2817 /// ExceptionSpecType - The type of exception specification this function has. 2818 unsigned ExceptionSpecType : 3; 2819 2820 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2821 unsigned HasAnyConsumedArgs : 1; 2822 2823 /// Variadic - Whether the function is variadic. 2824 unsigned Variadic : 1; 2825 2826 /// HasTrailingReturn - Whether this function has a trailing return type. 2827 unsigned HasTrailingReturn : 1; 2828 2829 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2830 /// 2831 /// This is a value of type \c RefQualifierKind. 2832 unsigned RefQualifier : 2; 2833 2834 // ArgInfo - There is an variable size array after the class in memory that 2835 // holds the argument types. 2836 2837 // Exceptions - There is another variable size array after ArgInfo that 2838 // holds the exception types. 2839 2840 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2841 // to the expression in the noexcept() specifier. 2842 2843 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2844 // be a pair of FunctionDecl* pointing to the function which should be used to 2845 // instantiate this function type's exception specification, and the function 2846 // from which it should be instantiated. 2847 2848 // ConsumedArgs - A variable size array, following Exceptions 2849 // and of length NumArgs, holding flags indicating which arguments 2850 // are consumed. This only appears if HasAnyConsumedArgs is true. 2851 2852 friend class ASTContext; // ASTContext creates these. 2853 2854 const bool *getConsumedArgsBuffer() const { 2855 assert(hasAnyConsumedArgs()); 2856 2857 // Find the end of the exceptions. 2858 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2859 if (getExceptionSpecType() != EST_ComputedNoexcept) 2860 eh_end += NumExceptions; 2861 else 2862 eh_end += 1; // NoexceptExpr 2863 2864 return reinterpret_cast<const bool*>(eh_end); 2865 } 2866 2867public: 2868 unsigned getNumArgs() const { return NumArgs; } 2869 QualType getArgType(unsigned i) const { 2870 assert(i < NumArgs && "Invalid argument number!"); 2871 return arg_type_begin()[i]; 2872 } 2873 2874 ExtProtoInfo getExtProtoInfo() const { 2875 ExtProtoInfo EPI; 2876 EPI.ExtInfo = getExtInfo(); 2877 EPI.Variadic = isVariadic(); 2878 EPI.HasTrailingReturn = hasTrailingReturn(); 2879 EPI.ExceptionSpecType = getExceptionSpecType(); 2880 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2881 EPI.RefQualifier = getRefQualifier(); 2882 if (EPI.ExceptionSpecType == EST_Dynamic) { 2883 EPI.NumExceptions = NumExceptions; 2884 EPI.Exceptions = exception_begin(); 2885 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2886 EPI.NoexceptExpr = getNoexceptExpr(); 2887 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2888 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2889 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2890 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2891 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2892 } 2893 if (hasAnyConsumedArgs()) 2894 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2895 return EPI; 2896 } 2897 2898 /// \brief Get the kind of exception specification on this function. 2899 ExceptionSpecificationType getExceptionSpecType() const { 2900 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2901 } 2902 /// \brief Return whether this function has any kind of exception spec. 2903 bool hasExceptionSpec() const { 2904 return getExceptionSpecType() != EST_None; 2905 } 2906 /// \brief Return whether this function has a dynamic (throw) exception spec. 2907 bool hasDynamicExceptionSpec() const { 2908 return isDynamicExceptionSpec(getExceptionSpecType()); 2909 } 2910 /// \brief Return whether this function has a noexcept exception spec. 2911 bool hasNoexceptExceptionSpec() const { 2912 return isNoexceptExceptionSpec(getExceptionSpecType()); 2913 } 2914 /// \brief Result type of getNoexceptSpec(). 2915 enum NoexceptResult { 2916 NR_NoNoexcept, ///< There is no noexcept specifier. 2917 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2918 NR_Dependent, ///< The noexcept specifier is dependent. 2919 NR_Throw, ///< The noexcept specifier evaluates to false. 2920 NR_Nothrow ///< The noexcept specifier evaluates to true. 2921 }; 2922 /// \brief Get the meaning of the noexcept spec on this function, if any. 2923 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2924 unsigned getNumExceptions() const { return NumExceptions; } 2925 QualType getExceptionType(unsigned i) const { 2926 assert(i < NumExceptions && "Invalid exception number!"); 2927 return exception_begin()[i]; 2928 } 2929 Expr *getNoexceptExpr() const { 2930 if (getExceptionSpecType() != EST_ComputedNoexcept) 2931 return 0; 2932 // NoexceptExpr sits where the arguments end. 2933 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2934 } 2935 /// \brief If this function type has an exception specification which hasn't 2936 /// been determined yet (either because it has not been evaluated or because 2937 /// it has not been instantiated), this is the function whose exception 2938 /// specification is represented by this type. 2939 FunctionDecl *getExceptionSpecDecl() const { 2940 if (getExceptionSpecType() != EST_Uninstantiated && 2941 getExceptionSpecType() != EST_Unevaluated) 2942 return 0; 2943 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2944 } 2945 /// \brief If this function type has an uninstantiated exception 2946 /// specification, this is the function whose exception specification 2947 /// should be instantiated to find the exception specification for 2948 /// this type. 2949 FunctionDecl *getExceptionSpecTemplate() const { 2950 if (getExceptionSpecType() != EST_Uninstantiated) 2951 return 0; 2952 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2953 } 2954 bool isNothrow(ASTContext &Ctx) const { 2955 ExceptionSpecificationType EST = getExceptionSpecType(); 2956 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2957 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2958 return true; 2959 if (EST != EST_ComputedNoexcept) 2960 return false; 2961 return getNoexceptSpec(Ctx) == NR_Nothrow; 2962 } 2963 2964 bool isVariadic() const { return Variadic; } 2965 2966 /// \brief Determines whether this function prototype contains a 2967 /// parameter pack at the end. 2968 /// 2969 /// A function template whose last parameter is a parameter pack can be 2970 /// called with an arbitrary number of arguments, much like a variadic 2971 /// function. 2972 bool isTemplateVariadic() const; 2973 2974 bool hasTrailingReturn() const { return HasTrailingReturn; } 2975 2976 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2977 2978 2979 /// \brief Retrieve the ref-qualifier associated with this function type. 2980 RefQualifierKind getRefQualifier() const { 2981 return static_cast<RefQualifierKind>(RefQualifier); 2982 } 2983 2984 typedef const QualType *arg_type_iterator; 2985 arg_type_iterator arg_type_begin() const { 2986 return reinterpret_cast<const QualType *>(this+1); 2987 } 2988 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2989 2990 typedef const QualType *exception_iterator; 2991 exception_iterator exception_begin() const { 2992 // exceptions begin where arguments end 2993 return arg_type_end(); 2994 } 2995 exception_iterator exception_end() const { 2996 if (getExceptionSpecType() != EST_Dynamic) 2997 return exception_begin(); 2998 return exception_begin() + NumExceptions; 2999 } 3000 3001 bool hasAnyConsumedArgs() const { 3002 return HasAnyConsumedArgs; 3003 } 3004 bool isArgConsumed(unsigned I) const { 3005 assert(I < getNumArgs() && "argument index out of range!"); 3006 if (hasAnyConsumedArgs()) 3007 return getConsumedArgsBuffer()[I]; 3008 return false; 3009 } 3010 3011 bool isSugared() const { return false; } 3012 QualType desugar() const { return QualType(this, 0); } 3013 3014 // FIXME: Remove the string version. 3015 void printExceptionSpecification(std::string &S, 3016 const PrintingPolicy &Policy) const; 3017 void printExceptionSpecification(raw_ostream &OS, 3018 const PrintingPolicy &Policy) const; 3019 3020 static bool classof(const Type *T) { 3021 return T->getTypeClass() == FunctionProto; 3022 } 3023 3024 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3025 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3026 arg_type_iterator ArgTys, unsigned NumArgs, 3027 const ExtProtoInfo &EPI, const ASTContext &Context); 3028}; 3029 3030 3031/// \brief Represents the dependent type named by a dependently-scoped 3032/// typename using declaration, e.g. 3033/// using typename Base<T>::foo; 3034/// Template instantiation turns these into the underlying type. 3035class UnresolvedUsingType : public Type { 3036 UnresolvedUsingTypenameDecl *Decl; 3037 3038 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3039 : Type(UnresolvedUsing, QualType(), true, true, false, 3040 /*ContainsUnexpandedParameterPack=*/false), 3041 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3042 friend class ASTContext; // ASTContext creates these. 3043public: 3044 3045 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3046 3047 bool isSugared() const { return false; } 3048 QualType desugar() const { return QualType(this, 0); } 3049 3050 static bool classof(const Type *T) { 3051 return T->getTypeClass() == UnresolvedUsing; 3052 } 3053 3054 void Profile(llvm::FoldingSetNodeID &ID) { 3055 return Profile(ID, Decl); 3056 } 3057 static void Profile(llvm::FoldingSetNodeID &ID, 3058 UnresolvedUsingTypenameDecl *D) { 3059 ID.AddPointer(D); 3060 } 3061}; 3062 3063 3064class TypedefType : public Type { 3065 TypedefNameDecl *Decl; 3066protected: 3067 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3068 : Type(tc, can, can->isDependentType(), 3069 can->isInstantiationDependentType(), 3070 can->isVariablyModifiedType(), 3071 /*ContainsUnexpandedParameterPack=*/false), 3072 Decl(const_cast<TypedefNameDecl*>(D)) { 3073 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3074 } 3075 friend class ASTContext; // ASTContext creates these. 3076public: 3077 3078 TypedefNameDecl *getDecl() const { return Decl; } 3079 3080 bool isSugared() const { return true; } 3081 QualType desugar() const; 3082 3083 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3084}; 3085 3086/// TypeOfExprType (GCC extension). 3087class TypeOfExprType : public Type { 3088 Expr *TOExpr; 3089 3090protected: 3091 TypeOfExprType(Expr *E, QualType can = QualType()); 3092 friend class ASTContext; // ASTContext creates these. 3093public: 3094 Expr *getUnderlyingExpr() const { return TOExpr; } 3095 3096 /// \brief Remove a single level of sugar. 3097 QualType desugar() const; 3098 3099 /// \brief Returns whether this type directly provides sugar. 3100 bool isSugared() const; 3101 3102 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3103}; 3104 3105/// \brief Internal representation of canonical, dependent 3106/// typeof(expr) types. 3107/// 3108/// This class is used internally by the ASTContext to manage 3109/// canonical, dependent types, only. Clients will only see instances 3110/// of this class via TypeOfExprType nodes. 3111class DependentTypeOfExprType 3112 : public TypeOfExprType, public llvm::FoldingSetNode { 3113 const ASTContext &Context; 3114 3115public: 3116 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3117 : TypeOfExprType(E), Context(Context) { } 3118 3119 void Profile(llvm::FoldingSetNodeID &ID) { 3120 Profile(ID, Context, getUnderlyingExpr()); 3121 } 3122 3123 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3124 Expr *E); 3125}; 3126 3127/// TypeOfType (GCC extension). 3128class TypeOfType : public Type { 3129 QualType TOType; 3130 TypeOfType(QualType T, QualType can) 3131 : Type(TypeOf, can, T->isDependentType(), 3132 T->isInstantiationDependentType(), 3133 T->isVariablyModifiedType(), 3134 T->containsUnexpandedParameterPack()), 3135 TOType(T) { 3136 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3137 } 3138 friend class ASTContext; // ASTContext creates these. 3139public: 3140 QualType getUnderlyingType() const { return TOType; } 3141 3142 /// \brief Remove a single level of sugar. 3143 QualType desugar() const { return getUnderlyingType(); } 3144 3145 /// \brief Returns whether this type directly provides sugar. 3146 bool isSugared() const { return true; } 3147 3148 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3149}; 3150 3151/// DecltypeType (C++0x) 3152class DecltypeType : public Type { 3153 Expr *E; 3154 QualType UnderlyingType; 3155 3156protected: 3157 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3158 friend class ASTContext; // ASTContext creates these. 3159public: 3160 Expr *getUnderlyingExpr() const { return E; } 3161 QualType getUnderlyingType() const { return UnderlyingType; } 3162 3163 /// \brief Remove a single level of sugar. 3164 QualType desugar() const; 3165 3166 /// \brief Returns whether this type directly provides sugar. 3167 bool isSugared() const; 3168 3169 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3170}; 3171 3172/// \brief Internal representation of canonical, dependent 3173/// decltype(expr) types. 3174/// 3175/// This class is used internally by the ASTContext to manage 3176/// canonical, dependent types, only. Clients will only see instances 3177/// of this class via DecltypeType nodes. 3178class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3179 const ASTContext &Context; 3180 3181public: 3182 DependentDecltypeType(const ASTContext &Context, Expr *E); 3183 3184 void Profile(llvm::FoldingSetNodeID &ID) { 3185 Profile(ID, Context, getUnderlyingExpr()); 3186 } 3187 3188 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3189 Expr *E); 3190}; 3191 3192/// \brief A unary type transform, which is a type constructed from another 3193class UnaryTransformType : public Type { 3194public: 3195 enum UTTKind { 3196 EnumUnderlyingType 3197 }; 3198 3199private: 3200 /// The untransformed type. 3201 QualType BaseType; 3202 /// The transformed type if not dependent, otherwise the same as BaseType. 3203 QualType UnderlyingType; 3204 3205 UTTKind UKind; 3206protected: 3207 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3208 QualType CanonicalTy); 3209 friend class ASTContext; 3210public: 3211 bool isSugared() const { return !isDependentType(); } 3212 QualType desugar() const { return UnderlyingType; } 3213 3214 QualType getUnderlyingType() const { return UnderlyingType; } 3215 QualType getBaseType() const { return BaseType; } 3216 3217 UTTKind getUTTKind() const { return UKind; } 3218 3219 static bool classof(const Type *T) { 3220 return T->getTypeClass() == UnaryTransform; 3221 } 3222}; 3223 3224class TagType : public Type { 3225 /// Stores the TagDecl associated with this type. The decl may point to any 3226 /// TagDecl that declares the entity. 3227 TagDecl * decl; 3228 3229 friend class ASTReader; 3230 3231protected: 3232 TagType(TypeClass TC, const TagDecl *D, QualType can); 3233 3234public: 3235 TagDecl *getDecl() const; 3236 3237 /// @brief Determines whether this type is in the process of being 3238 /// defined. 3239 bool isBeingDefined() const; 3240 3241 static bool classof(const Type *T) { 3242 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3243 } 3244}; 3245 3246/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3247/// to detect TagType objects of structs/unions/classes. 3248class RecordType : public TagType { 3249protected: 3250 explicit RecordType(const RecordDecl *D) 3251 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3252 explicit RecordType(TypeClass TC, RecordDecl *D) 3253 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3254 friend class ASTContext; // ASTContext creates these. 3255public: 3256 3257 RecordDecl *getDecl() const { 3258 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3259 } 3260 3261 // FIXME: This predicate is a helper to QualType/Type. It needs to 3262 // recursively check all fields for const-ness. If any field is declared 3263 // const, it needs to return false. 3264 bool hasConstFields() const { return false; } 3265 3266 bool isSugared() const { return false; } 3267 QualType desugar() const { return QualType(this, 0); } 3268 3269 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3270}; 3271 3272/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3273/// to detect TagType objects of enums. 3274class EnumType : public TagType { 3275 explicit EnumType(const EnumDecl *D) 3276 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3277 friend class ASTContext; // ASTContext creates these. 3278public: 3279 3280 EnumDecl *getDecl() const { 3281 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3282 } 3283 3284 bool isSugared() const { return false; } 3285 QualType desugar() const { return QualType(this, 0); } 3286 3287 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3288}; 3289 3290/// AttributedType - An attributed type is a type to which a type 3291/// attribute has been applied. The "modified type" is the 3292/// fully-sugared type to which the attributed type was applied; 3293/// generally it is not canonically equivalent to the attributed type. 3294/// The "equivalent type" is the minimally-desugared type which the 3295/// type is canonically equivalent to. 3296/// 3297/// For example, in the following attributed type: 3298/// int32_t __attribute__((vector_size(16))) 3299/// - the modified type is the TypedefType for int32_t 3300/// - the equivalent type is VectorType(16, int32_t) 3301/// - the canonical type is VectorType(16, int) 3302class AttributedType : public Type, public llvm::FoldingSetNode { 3303public: 3304 // It is really silly to have yet another attribute-kind enum, but 3305 // clang::attr::Kind doesn't currently cover the pure type attrs. 3306 enum Kind { 3307 // Expression operand. 3308 attr_address_space, 3309 attr_regparm, 3310 attr_vector_size, 3311 attr_neon_vector_type, 3312 attr_neon_polyvector_type, 3313 3314 FirstExprOperandKind = attr_address_space, 3315 LastExprOperandKind = attr_neon_polyvector_type, 3316 3317 // Enumerated operand (string or keyword). 3318 attr_objc_gc, 3319 attr_objc_ownership, 3320 attr_pcs, 3321 3322 FirstEnumOperandKind = attr_objc_gc, 3323 LastEnumOperandKind = attr_pcs, 3324 3325 // No operand. 3326 attr_noreturn, 3327 attr_cdecl, 3328 attr_fastcall, 3329 attr_stdcall, 3330 attr_thiscall, 3331 attr_pascal, 3332 attr_pnaclcall, 3333 attr_inteloclbicc 3334 }; 3335 3336private: 3337 QualType ModifiedType; 3338 QualType EquivalentType; 3339 3340 friend class ASTContext; // creates these 3341 3342 AttributedType(QualType canon, Kind attrKind, 3343 QualType modified, QualType equivalent) 3344 : Type(Attributed, canon, canon->isDependentType(), 3345 canon->isInstantiationDependentType(), 3346 canon->isVariablyModifiedType(), 3347 canon->containsUnexpandedParameterPack()), 3348 ModifiedType(modified), EquivalentType(equivalent) { 3349 AttributedTypeBits.AttrKind = attrKind; 3350 } 3351 3352public: 3353 Kind getAttrKind() const { 3354 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3355 } 3356 3357 QualType getModifiedType() const { return ModifiedType; } 3358 QualType getEquivalentType() const { return EquivalentType; } 3359 3360 bool isSugared() const { return true; } 3361 QualType desugar() const { return getEquivalentType(); } 3362 3363 void Profile(llvm::FoldingSetNodeID &ID) { 3364 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3365 } 3366 3367 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3368 QualType modified, QualType equivalent) { 3369 ID.AddInteger(attrKind); 3370 ID.AddPointer(modified.getAsOpaquePtr()); 3371 ID.AddPointer(equivalent.getAsOpaquePtr()); 3372 } 3373 3374 static bool classof(const Type *T) { 3375 return T->getTypeClass() == Attributed; 3376 } 3377}; 3378 3379class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3380 // Helper data collector for canonical types. 3381 struct CanonicalTTPTInfo { 3382 unsigned Depth : 15; 3383 unsigned ParameterPack : 1; 3384 unsigned Index : 16; 3385 }; 3386 3387 union { 3388 // Info for the canonical type. 3389 CanonicalTTPTInfo CanTTPTInfo; 3390 // Info for the non-canonical type. 3391 TemplateTypeParmDecl *TTPDecl; 3392 }; 3393 3394 /// Build a non-canonical type. 3395 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3396 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3397 /*InstantiationDependent=*/true, 3398 /*VariablyModified=*/false, 3399 Canon->containsUnexpandedParameterPack()), 3400 TTPDecl(TTPDecl) { } 3401 3402 /// Build the canonical type. 3403 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3404 : Type(TemplateTypeParm, QualType(this, 0), 3405 /*Dependent=*/true, 3406 /*InstantiationDependent=*/true, 3407 /*VariablyModified=*/false, PP) { 3408 CanTTPTInfo.Depth = D; 3409 CanTTPTInfo.Index = I; 3410 CanTTPTInfo.ParameterPack = PP; 3411 } 3412 3413 friend class ASTContext; // ASTContext creates these 3414 3415 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3416 QualType Can = getCanonicalTypeInternal(); 3417 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3418 } 3419 3420public: 3421 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3422 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3423 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3424 3425 TemplateTypeParmDecl *getDecl() const { 3426 return isCanonicalUnqualified() ? 0 : TTPDecl; 3427 } 3428 3429 IdentifierInfo *getIdentifier() const; 3430 3431 bool isSugared() const { return false; } 3432 QualType desugar() const { return QualType(this, 0); } 3433 3434 void Profile(llvm::FoldingSetNodeID &ID) { 3435 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3436 } 3437 3438 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3439 unsigned Index, bool ParameterPack, 3440 TemplateTypeParmDecl *TTPDecl) { 3441 ID.AddInteger(Depth); 3442 ID.AddInteger(Index); 3443 ID.AddBoolean(ParameterPack); 3444 ID.AddPointer(TTPDecl); 3445 } 3446 3447 static bool classof(const Type *T) { 3448 return T->getTypeClass() == TemplateTypeParm; 3449 } 3450}; 3451 3452/// \brief Represents the result of substituting a type for a template 3453/// type parameter. 3454/// 3455/// Within an instantiated template, all template type parameters have 3456/// been replaced with these. They are used solely to record that a 3457/// type was originally written as a template type parameter; 3458/// therefore they are never canonical. 3459class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3460 // The original type parameter. 3461 const TemplateTypeParmType *Replaced; 3462 3463 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3464 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3465 Canon->isInstantiationDependentType(), 3466 Canon->isVariablyModifiedType(), 3467 Canon->containsUnexpandedParameterPack()), 3468 Replaced(Param) { } 3469 3470 friend class ASTContext; 3471 3472public: 3473 /// Gets the template parameter that was substituted for. 3474 const TemplateTypeParmType *getReplacedParameter() const { 3475 return Replaced; 3476 } 3477 3478 /// Gets the type that was substituted for the template 3479 /// parameter. 3480 QualType getReplacementType() const { 3481 return getCanonicalTypeInternal(); 3482 } 3483 3484 bool isSugared() const { return true; } 3485 QualType desugar() const { return getReplacementType(); } 3486 3487 void Profile(llvm::FoldingSetNodeID &ID) { 3488 Profile(ID, getReplacedParameter(), getReplacementType()); 3489 } 3490 static void Profile(llvm::FoldingSetNodeID &ID, 3491 const TemplateTypeParmType *Replaced, 3492 QualType Replacement) { 3493 ID.AddPointer(Replaced); 3494 ID.AddPointer(Replacement.getAsOpaquePtr()); 3495 } 3496 3497 static bool classof(const Type *T) { 3498 return T->getTypeClass() == SubstTemplateTypeParm; 3499 } 3500}; 3501 3502/// \brief Represents the result of substituting a set of types for a template 3503/// type parameter pack. 3504/// 3505/// When a pack expansion in the source code contains multiple parameter packs 3506/// and those parameter packs correspond to different levels of template 3507/// parameter lists, this type node is used to represent a template type 3508/// parameter pack from an outer level, which has already had its argument pack 3509/// substituted but that still lives within a pack expansion that itself 3510/// could not be instantiated. When actually performing a substitution into 3511/// that pack expansion (e.g., when all template parameters have corresponding 3512/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3513/// at the current pack substitution index. 3514class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3515 /// \brief The original type parameter. 3516 const TemplateTypeParmType *Replaced; 3517 3518 /// \brief A pointer to the set of template arguments that this 3519 /// parameter pack is instantiated with. 3520 const TemplateArgument *Arguments; 3521 3522 /// \brief The number of template arguments in \c Arguments. 3523 unsigned NumArguments; 3524 3525 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3526 QualType Canon, 3527 const TemplateArgument &ArgPack); 3528 3529 friend class ASTContext; 3530 3531public: 3532 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3533 3534 /// Gets the template parameter that was substituted for. 3535 const TemplateTypeParmType *getReplacedParameter() const { 3536 return Replaced; 3537 } 3538 3539 bool isSugared() const { return false; } 3540 QualType desugar() const { return QualType(this, 0); } 3541 3542 TemplateArgument getArgumentPack() const; 3543 3544 void Profile(llvm::FoldingSetNodeID &ID); 3545 static void Profile(llvm::FoldingSetNodeID &ID, 3546 const TemplateTypeParmType *Replaced, 3547 const TemplateArgument &ArgPack); 3548 3549 static bool classof(const Type *T) { 3550 return T->getTypeClass() == SubstTemplateTypeParmPack; 3551 } 3552}; 3553 3554/// \brief Represents a C++0x auto type. 3555/// 3556/// These types are usually a placeholder for a deduced type. However, within 3557/// templates and before the initializer is attached, there is no deduced type 3558/// and an auto type is type-dependent and canonical. 3559class AutoType : public Type, public llvm::FoldingSetNode { 3560 AutoType(QualType DeducedType) 3561 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3562 /*Dependent=*/DeducedType.isNull(), 3563 /*InstantiationDependent=*/DeducedType.isNull(), 3564 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3565 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3566 "deduced a dependent type for auto"); 3567 } 3568 3569 friend class ASTContext; // ASTContext creates these 3570 3571public: 3572 bool isSugared() const { return isDeduced(); } 3573 QualType desugar() const { return getCanonicalTypeInternal(); } 3574 3575 QualType getDeducedType() const { 3576 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3577 } 3578 bool isDeduced() const { 3579 return !isDependentType(); 3580 } 3581 3582 void Profile(llvm::FoldingSetNodeID &ID) { 3583 Profile(ID, getDeducedType()); 3584 } 3585 3586 static void Profile(llvm::FoldingSetNodeID &ID, 3587 QualType Deduced) { 3588 ID.AddPointer(Deduced.getAsOpaquePtr()); 3589 } 3590 3591 static bool classof(const Type *T) { 3592 return T->getTypeClass() == Auto; 3593 } 3594}; 3595 3596/// \brief Represents a type template specialization; the template 3597/// must be a class template, a type alias template, or a template 3598/// template parameter. A template which cannot be resolved to one of 3599/// these, e.g. because it is written with a dependent scope 3600/// specifier, is instead represented as a 3601/// @c DependentTemplateSpecializationType. 3602/// 3603/// A non-dependent template specialization type is always "sugar", 3604/// typically for a @c RecordType. For example, a class template 3605/// specialization type of @c vector<int> will refer to a tag type for 3606/// the instantiation @c std::vector<int, std::allocator<int>> 3607/// 3608/// Template specializations are dependent if either the template or 3609/// any of the template arguments are dependent, in which case the 3610/// type may also be canonical. 3611/// 3612/// Instances of this type are allocated with a trailing array of 3613/// TemplateArguments, followed by a QualType representing the 3614/// non-canonical aliased type when the template is a type alias 3615/// template. 3616class TemplateSpecializationType 3617 : public Type, public llvm::FoldingSetNode { 3618 /// \brief The name of the template being specialized. This is 3619 /// either a TemplateName::Template (in which case it is a 3620 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3621 /// TypeAliasTemplateDecl*), a 3622 /// TemplateName::SubstTemplateTemplateParmPack, or a 3623 /// TemplateName::SubstTemplateTemplateParm (in which case the 3624 /// replacement must, recursively, be one of these). 3625 TemplateName Template; 3626 3627 /// \brief - The number of template arguments named in this class 3628 /// template specialization. 3629 unsigned NumArgs : 31; 3630 3631 /// \brief Whether this template specialization type is a substituted 3632 /// type alias. 3633 bool TypeAlias : 1; 3634 3635 TemplateSpecializationType(TemplateName T, 3636 const TemplateArgument *Args, 3637 unsigned NumArgs, QualType Canon, 3638 QualType Aliased); 3639 3640 friend class ASTContext; // ASTContext creates these 3641 3642public: 3643 /// \brief Determine whether any of the given template arguments are 3644 /// dependent. 3645 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3646 unsigned NumArgs, 3647 bool &InstantiationDependent); 3648 3649 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3650 unsigned NumArgs, 3651 bool &InstantiationDependent); 3652 3653 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3654 bool &InstantiationDependent); 3655 3656 /// \brief Print a template argument list, including the '<' and '>' 3657 /// enclosing the template arguments. 3658 // FIXME: remove the string ones. 3659 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3660 unsigned NumArgs, 3661 const PrintingPolicy &Policy, 3662 bool SkipBrackets = false); 3663 3664 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3665 unsigned NumArgs, 3666 const PrintingPolicy &Policy); 3667 3668 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3669 const PrintingPolicy &Policy); 3670 3671 /// \brief Print a template argument list, including the '<' and '>' 3672 /// enclosing the template arguments. 3673 static void PrintTemplateArgumentList(raw_ostream &OS, 3674 const TemplateArgument *Args, 3675 unsigned NumArgs, 3676 const PrintingPolicy &Policy, 3677 bool SkipBrackets = false); 3678 3679 static void PrintTemplateArgumentList(raw_ostream &OS, 3680 const TemplateArgumentLoc *Args, 3681 unsigned NumArgs, 3682 const PrintingPolicy &Policy); 3683 3684 static void PrintTemplateArgumentList(raw_ostream &OS, 3685 const TemplateArgumentListInfo &, 3686 const PrintingPolicy &Policy); 3687 3688 /// True if this template specialization type matches a current 3689 /// instantiation in the context in which it is found. 3690 bool isCurrentInstantiation() const { 3691 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3692 } 3693 3694 /// \brief Determine if this template specialization type is for a type alias 3695 /// template that has been substituted. 3696 /// 3697 /// Nearly every template specialization type whose template is an alias 3698 /// template will be substituted. However, this is not the case when 3699 /// the specialization contains a pack expansion but the template alias 3700 /// does not have a corresponding parameter pack, e.g., 3701 /// 3702 /// \code 3703 /// template<typename T, typename U, typename V> struct S; 3704 /// template<typename T, typename U> using A = S<T, int, U>; 3705 /// template<typename... Ts> struct X { 3706 /// typedef A<Ts...> type; // not a type alias 3707 /// }; 3708 /// \endcode 3709 bool isTypeAlias() const { return TypeAlias; } 3710 3711 /// Get the aliased type, if this is a specialization of a type alias 3712 /// template. 3713 QualType getAliasedType() const { 3714 assert(isTypeAlias() && "not a type alias template specialization"); 3715 return *reinterpret_cast<const QualType*>(end()); 3716 } 3717 3718 typedef const TemplateArgument * iterator; 3719 3720 iterator begin() const { return getArgs(); } 3721 iterator end() const; // defined inline in TemplateBase.h 3722 3723 /// \brief Retrieve the name of the template that we are specializing. 3724 TemplateName getTemplateName() const { return Template; } 3725 3726 /// \brief Retrieve the template arguments. 3727 const TemplateArgument *getArgs() const { 3728 return reinterpret_cast<const TemplateArgument *>(this + 1); 3729 } 3730 3731 /// \brief Retrieve the number of template arguments. 3732 unsigned getNumArgs() const { return NumArgs; } 3733 3734 /// \brief Retrieve a specific template argument as a type. 3735 /// \pre @c isArgType(Arg) 3736 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3737 3738 bool isSugared() const { 3739 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3740 } 3741 QualType desugar() const { return getCanonicalTypeInternal(); } 3742 3743 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3744 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3745 if (isTypeAlias()) 3746 getAliasedType().Profile(ID); 3747 } 3748 3749 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3750 const TemplateArgument *Args, 3751 unsigned NumArgs, 3752 const ASTContext &Context); 3753 3754 static bool classof(const Type *T) { 3755 return T->getTypeClass() == TemplateSpecialization; 3756 } 3757}; 3758 3759/// \brief The injected class name of a C++ class template or class 3760/// template partial specialization. Used to record that a type was 3761/// spelled with a bare identifier rather than as a template-id; the 3762/// equivalent for non-templated classes is just RecordType. 3763/// 3764/// Injected class name types are always dependent. Template 3765/// instantiation turns these into RecordTypes. 3766/// 3767/// Injected class name types are always canonical. This works 3768/// because it is impossible to compare an injected class name type 3769/// with the corresponding non-injected template type, for the same 3770/// reason that it is impossible to directly compare template 3771/// parameters from different dependent contexts: injected class name 3772/// types can only occur within the scope of a particular templated 3773/// declaration, and within that scope every template specialization 3774/// will canonicalize to the injected class name (when appropriate 3775/// according to the rules of the language). 3776class InjectedClassNameType : public Type { 3777 CXXRecordDecl *Decl; 3778 3779 /// The template specialization which this type represents. 3780 /// For example, in 3781 /// template <class T> class A { ... }; 3782 /// this is A<T>, whereas in 3783 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3784 /// this is A<B<X,Y> >. 3785 /// 3786 /// It is always unqualified, always a template specialization type, 3787 /// and always dependent. 3788 QualType InjectedType; 3789 3790 friend class ASTContext; // ASTContext creates these. 3791 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3792 // currently suitable for AST reading, too much 3793 // interdependencies. 3794 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3795 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3796 /*InstantiationDependent=*/true, 3797 /*VariablyModified=*/false, 3798 /*ContainsUnexpandedParameterPack=*/false), 3799 Decl(D), InjectedType(TST) { 3800 assert(isa<TemplateSpecializationType>(TST)); 3801 assert(!TST.hasQualifiers()); 3802 assert(TST->isDependentType()); 3803 } 3804 3805public: 3806 QualType getInjectedSpecializationType() const { return InjectedType; } 3807 const TemplateSpecializationType *getInjectedTST() const { 3808 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3809 } 3810 3811 CXXRecordDecl *getDecl() const; 3812 3813 bool isSugared() const { return false; } 3814 QualType desugar() const { return QualType(this, 0); } 3815 3816 static bool classof(const Type *T) { 3817 return T->getTypeClass() == InjectedClassName; 3818 } 3819}; 3820 3821/// \brief The kind of a tag type. 3822enum TagTypeKind { 3823 /// \brief The "struct" keyword. 3824 TTK_Struct, 3825 /// \brief The "__interface" keyword. 3826 TTK_Interface, 3827 /// \brief The "union" keyword. 3828 TTK_Union, 3829 /// \brief The "class" keyword. 3830 TTK_Class, 3831 /// \brief The "enum" keyword. 3832 TTK_Enum 3833}; 3834 3835/// \brief The elaboration keyword that precedes a qualified type name or 3836/// introduces an elaborated-type-specifier. 3837enum ElaboratedTypeKeyword { 3838 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3839 ETK_Struct, 3840 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3841 ETK_Interface, 3842 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3843 ETK_Union, 3844 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3845 ETK_Class, 3846 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3847 ETK_Enum, 3848 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3849 /// \c typename T::type. 3850 ETK_Typename, 3851 /// \brief No keyword precedes the qualified type name. 3852 ETK_None 3853}; 3854 3855/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3856/// The keyword in stored in the free bits of the base class. 3857/// Also provides a few static helpers for converting and printing 3858/// elaborated type keyword and tag type kind enumerations. 3859class TypeWithKeyword : public Type { 3860protected: 3861 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3862 QualType Canonical, bool Dependent, 3863 bool InstantiationDependent, bool VariablyModified, 3864 bool ContainsUnexpandedParameterPack) 3865 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3866 ContainsUnexpandedParameterPack) { 3867 TypeWithKeywordBits.Keyword = Keyword; 3868 } 3869 3870public: 3871 ElaboratedTypeKeyword getKeyword() const { 3872 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3873 } 3874 3875 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3876 /// into an elaborated type keyword. 3877 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3878 3879 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3880 /// into a tag type kind. It is an error to provide a type specifier 3881 /// which *isn't* a tag kind here. 3882 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3883 3884 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3885 /// elaborated type keyword. 3886 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3887 3888 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3889 // a TagTypeKind. It is an error to provide an elaborated type keyword 3890 /// which *isn't* a tag kind here. 3891 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3892 3893 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3894 3895 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3896 3897 static const char *getTagTypeKindName(TagTypeKind Kind) { 3898 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3899 } 3900 3901 class CannotCastToThisType {}; 3902 static CannotCastToThisType classof(const Type *); 3903}; 3904 3905/// \brief Represents a type that was referred to using an elaborated type 3906/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3907/// or both. 3908/// 3909/// This type is used to keep track of a type name as written in the 3910/// source code, including tag keywords and any nested-name-specifiers. 3911/// The type itself is always "sugar", used to express what was written 3912/// in the source code but containing no additional semantic information. 3913class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3914 3915 /// \brief The nested name specifier containing the qualifier. 3916 NestedNameSpecifier *NNS; 3917 3918 /// \brief The type that this qualified name refers to. 3919 QualType NamedType; 3920 3921 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3922 QualType NamedType, QualType CanonType) 3923 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3924 NamedType->isDependentType(), 3925 NamedType->isInstantiationDependentType(), 3926 NamedType->isVariablyModifiedType(), 3927 NamedType->containsUnexpandedParameterPack()), 3928 NNS(NNS), NamedType(NamedType) { 3929 assert(!(Keyword == ETK_None && NNS == 0) && 3930 "ElaboratedType cannot have elaborated type keyword " 3931 "and name qualifier both null."); 3932 } 3933 3934 friend class ASTContext; // ASTContext creates these 3935 3936public: 3937 ~ElaboratedType(); 3938 3939 /// \brief Retrieve the qualification on this type. 3940 NestedNameSpecifier *getQualifier() const { return NNS; } 3941 3942 /// \brief Retrieve the type named by the qualified-id. 3943 QualType getNamedType() const { return NamedType; } 3944 3945 /// \brief Remove a single level of sugar. 3946 QualType desugar() const { return getNamedType(); } 3947 3948 /// \brief Returns whether this type directly provides sugar. 3949 bool isSugared() const { return true; } 3950 3951 void Profile(llvm::FoldingSetNodeID &ID) { 3952 Profile(ID, getKeyword(), NNS, NamedType); 3953 } 3954 3955 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3956 NestedNameSpecifier *NNS, QualType NamedType) { 3957 ID.AddInteger(Keyword); 3958 ID.AddPointer(NNS); 3959 NamedType.Profile(ID); 3960 } 3961 3962 static bool classof(const Type *T) { 3963 return T->getTypeClass() == Elaborated; 3964 } 3965}; 3966 3967/// \brief Represents a qualified type name for which the type name is 3968/// dependent. 3969/// 3970/// DependentNameType represents a class of dependent types that involve a 3971/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3972/// name of a type. The DependentNameType may start with a "typename" (for a 3973/// typename-specifier), "class", "struct", "union", or "enum" (for a 3974/// dependent elaborated-type-specifier), or nothing (in contexts where we 3975/// know that we must be referring to a type, e.g., in a base class specifier). 3976class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3977 3978 /// \brief The nested name specifier containing the qualifier. 3979 NestedNameSpecifier *NNS; 3980 3981 /// \brief The type that this typename specifier refers to. 3982 const IdentifierInfo *Name; 3983 3984 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3985 const IdentifierInfo *Name, QualType CanonType) 3986 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3987 /*InstantiationDependent=*/true, 3988 /*VariablyModified=*/false, 3989 NNS->containsUnexpandedParameterPack()), 3990 NNS(NNS), Name(Name) { 3991 assert(NNS->isDependent() && 3992 "DependentNameType requires a dependent nested-name-specifier"); 3993 } 3994 3995 friend class ASTContext; // ASTContext creates these 3996 3997public: 3998 /// \brief Retrieve the qualification on this type. 3999 NestedNameSpecifier *getQualifier() const { return NNS; } 4000 4001 /// \brief Retrieve the type named by the typename specifier as an 4002 /// identifier. 4003 /// 4004 /// This routine will return a non-NULL identifier pointer when the 4005 /// form of the original typename was terminated by an identifier, 4006 /// e.g., "typename T::type". 4007 const IdentifierInfo *getIdentifier() const { 4008 return Name; 4009 } 4010 4011 bool isSugared() const { return false; } 4012 QualType desugar() const { return QualType(this, 0); } 4013 4014 void Profile(llvm::FoldingSetNodeID &ID) { 4015 Profile(ID, getKeyword(), NNS, Name); 4016 } 4017 4018 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4019 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4020 ID.AddInteger(Keyword); 4021 ID.AddPointer(NNS); 4022 ID.AddPointer(Name); 4023 } 4024 4025 static bool classof(const Type *T) { 4026 return T->getTypeClass() == DependentName; 4027 } 4028}; 4029 4030/// DependentTemplateSpecializationType - Represents a template 4031/// specialization type whose template cannot be resolved, e.g. 4032/// A<T>::template B<T> 4033class DependentTemplateSpecializationType : 4034 public TypeWithKeyword, public llvm::FoldingSetNode { 4035 4036 /// \brief The nested name specifier containing the qualifier. 4037 NestedNameSpecifier *NNS; 4038 4039 /// \brief The identifier of the template. 4040 const IdentifierInfo *Name; 4041 4042 /// \brief - The number of template arguments named in this class 4043 /// template specialization. 4044 unsigned NumArgs; 4045 4046 const TemplateArgument *getArgBuffer() const { 4047 return reinterpret_cast<const TemplateArgument*>(this+1); 4048 } 4049 TemplateArgument *getArgBuffer() { 4050 return reinterpret_cast<TemplateArgument*>(this+1); 4051 } 4052 4053 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4054 NestedNameSpecifier *NNS, 4055 const IdentifierInfo *Name, 4056 unsigned NumArgs, 4057 const TemplateArgument *Args, 4058 QualType Canon); 4059 4060 friend class ASTContext; // ASTContext creates these 4061 4062public: 4063 NestedNameSpecifier *getQualifier() const { return NNS; } 4064 const IdentifierInfo *getIdentifier() const { return Name; } 4065 4066 /// \brief Retrieve the template arguments. 4067 const TemplateArgument *getArgs() const { 4068 return getArgBuffer(); 4069 } 4070 4071 /// \brief Retrieve the number of template arguments. 4072 unsigned getNumArgs() const { return NumArgs; } 4073 4074 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4075 4076 typedef const TemplateArgument * iterator; 4077 iterator begin() const { return getArgs(); } 4078 iterator end() const; // inline in TemplateBase.h 4079 4080 bool isSugared() const { return false; } 4081 QualType desugar() const { return QualType(this, 0); } 4082 4083 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4084 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4085 } 4086 4087 static void Profile(llvm::FoldingSetNodeID &ID, 4088 const ASTContext &Context, 4089 ElaboratedTypeKeyword Keyword, 4090 NestedNameSpecifier *Qualifier, 4091 const IdentifierInfo *Name, 4092 unsigned NumArgs, 4093 const TemplateArgument *Args); 4094 4095 static bool classof(const Type *T) { 4096 return T->getTypeClass() == DependentTemplateSpecialization; 4097 } 4098}; 4099 4100/// \brief Represents a pack expansion of types. 4101/// 4102/// Pack expansions are part of C++0x variadic templates. A pack 4103/// expansion contains a pattern, which itself contains one or more 4104/// "unexpanded" parameter packs. When instantiated, a pack expansion 4105/// produces a series of types, each instantiated from the pattern of 4106/// the expansion, where the Ith instantiation of the pattern uses the 4107/// Ith arguments bound to each of the unexpanded parameter packs. The 4108/// pack expansion is considered to "expand" these unexpanded 4109/// parameter packs. 4110/// 4111/// \code 4112/// template<typename ...Types> struct tuple; 4113/// 4114/// template<typename ...Types> 4115/// struct tuple_of_references { 4116/// typedef tuple<Types&...> type; 4117/// }; 4118/// \endcode 4119/// 4120/// Here, the pack expansion \c Types&... is represented via a 4121/// PackExpansionType whose pattern is Types&. 4122class PackExpansionType : public Type, public llvm::FoldingSetNode { 4123 /// \brief The pattern of the pack expansion. 4124 QualType Pattern; 4125 4126 /// \brief The number of expansions that this pack expansion will 4127 /// generate when substituted (+1), or indicates that 4128 /// 4129 /// This field will only have a non-zero value when some of the parameter 4130 /// packs that occur within the pattern have been substituted but others have 4131 /// not. 4132 unsigned NumExpansions; 4133 4134 PackExpansionType(QualType Pattern, QualType Canon, 4135 llvm::Optional<unsigned> NumExpansions) 4136 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4137 /*InstantiationDependent=*/true, 4138 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4139 /*ContainsUnexpandedParameterPack=*/false), 4140 Pattern(Pattern), 4141 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4142 4143 friend class ASTContext; // ASTContext creates these 4144 4145public: 4146 /// \brief Retrieve the pattern of this pack expansion, which is the 4147 /// type that will be repeatedly instantiated when instantiating the 4148 /// pack expansion itself. 4149 QualType getPattern() const { return Pattern; } 4150 4151 /// \brief Retrieve the number of expansions that this pack expansion will 4152 /// generate, if known. 4153 llvm::Optional<unsigned> getNumExpansions() const { 4154 if (NumExpansions) 4155 return NumExpansions - 1; 4156 4157 return llvm::Optional<unsigned>(); 4158 } 4159 4160 bool isSugared() const { return false; } 4161 QualType desugar() const { return QualType(this, 0); } 4162 4163 void Profile(llvm::FoldingSetNodeID &ID) { 4164 Profile(ID, getPattern(), getNumExpansions()); 4165 } 4166 4167 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4168 llvm::Optional<unsigned> NumExpansions) { 4169 ID.AddPointer(Pattern.getAsOpaquePtr()); 4170 ID.AddBoolean(NumExpansions); 4171 if (NumExpansions) 4172 ID.AddInteger(*NumExpansions); 4173 } 4174 4175 static bool classof(const Type *T) { 4176 return T->getTypeClass() == PackExpansion; 4177 } 4178}; 4179 4180/// ObjCObjectType - Represents a class type in Objective C. 4181/// Every Objective C type is a combination of a base type and a 4182/// list of protocols. 4183/// 4184/// Given the following declarations: 4185/// \code 4186/// \@class C; 4187/// \@protocol P; 4188/// \endcode 4189/// 4190/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4191/// with base C and no protocols. 4192/// 4193/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4194/// 4195/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4196/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4197/// and no protocols. 4198/// 4199/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4200/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4201/// this should get its own sugar class to better represent the source. 4202class ObjCObjectType : public Type { 4203 // ObjCObjectType.NumProtocols - the number of protocols stored 4204 // after the ObjCObjectPointerType node. 4205 // 4206 // These protocols are those written directly on the type. If 4207 // protocol qualifiers ever become additive, the iterators will need 4208 // to get kindof complicated. 4209 // 4210 // In the canonical object type, these are sorted alphabetically 4211 // and uniqued. 4212 4213 /// Either a BuiltinType or an InterfaceType or sugar for either. 4214 QualType BaseType; 4215 4216 ObjCProtocolDecl * const *getProtocolStorage() const { 4217 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4218 } 4219 4220 ObjCProtocolDecl **getProtocolStorage(); 4221 4222protected: 4223 ObjCObjectType(QualType Canonical, QualType Base, 4224 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4225 4226 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4227 ObjCObjectType(enum Nonce_ObjCInterface) 4228 : Type(ObjCInterface, QualType(), false, false, false, false), 4229 BaseType(QualType(this_(), 0)) { 4230 ObjCObjectTypeBits.NumProtocols = 0; 4231 } 4232 4233public: 4234 /// getBaseType - Gets the base type of this object type. This is 4235 /// always (possibly sugar for) one of: 4236 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4237 /// user, which is a typedef for an ObjCPointerType) 4238 /// - the 'Class' builtin type (same caveat) 4239 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4240 QualType getBaseType() const { return BaseType; } 4241 4242 bool isObjCId() const { 4243 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4244 } 4245 bool isObjCClass() const { 4246 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4247 } 4248 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4249 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4250 bool isObjCUnqualifiedIdOrClass() const { 4251 if (!qual_empty()) return false; 4252 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4253 return T->getKind() == BuiltinType::ObjCId || 4254 T->getKind() == BuiltinType::ObjCClass; 4255 return false; 4256 } 4257 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4258 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4259 4260 /// Gets the interface declaration for this object type, if the base type 4261 /// really is an interface. 4262 ObjCInterfaceDecl *getInterface() const; 4263 4264 typedef ObjCProtocolDecl * const *qual_iterator; 4265 4266 qual_iterator qual_begin() const { return getProtocolStorage(); } 4267 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4268 4269 bool qual_empty() const { return getNumProtocols() == 0; } 4270 4271 /// getNumProtocols - Return the number of qualifying protocols in this 4272 /// interface type, or 0 if there are none. 4273 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4274 4275 /// \brief Fetch a protocol by index. 4276 ObjCProtocolDecl *getProtocol(unsigned I) const { 4277 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4278 return qual_begin()[I]; 4279 } 4280 4281 bool isSugared() const { return false; } 4282 QualType desugar() const { return QualType(this, 0); } 4283 4284 static bool classof(const Type *T) { 4285 return T->getTypeClass() == ObjCObject || 4286 T->getTypeClass() == ObjCInterface; 4287 } 4288}; 4289 4290/// ObjCObjectTypeImpl - A class providing a concrete implementation 4291/// of ObjCObjectType, so as to not increase the footprint of 4292/// ObjCInterfaceType. Code outside of ASTContext and the core type 4293/// system should not reference this type. 4294class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4295 friend class ASTContext; 4296 4297 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4298 // will need to be modified. 4299 4300 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4301 ObjCProtocolDecl * const *Protocols, 4302 unsigned NumProtocols) 4303 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4304 4305public: 4306 void Profile(llvm::FoldingSetNodeID &ID); 4307 static void Profile(llvm::FoldingSetNodeID &ID, 4308 QualType Base, 4309 ObjCProtocolDecl *const *protocols, 4310 unsigned NumProtocols); 4311}; 4312 4313inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4314 return reinterpret_cast<ObjCProtocolDecl**>( 4315 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4316} 4317 4318/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4319/// object oriented design. They basically correspond to C++ classes. There 4320/// are two kinds of interface types, normal interfaces like "NSString" and 4321/// qualified interfaces, which are qualified with a protocol list like 4322/// "NSString<NSCopyable, NSAmazing>". 4323/// 4324/// ObjCInterfaceType guarantees the following properties when considered 4325/// as a subtype of its superclass, ObjCObjectType: 4326/// - There are no protocol qualifiers. To reinforce this, code which 4327/// tries to invoke the protocol methods via an ObjCInterfaceType will 4328/// fail to compile. 4329/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4330/// T->getBaseType() == QualType(T, 0). 4331class ObjCInterfaceType : public ObjCObjectType { 4332 mutable ObjCInterfaceDecl *Decl; 4333 4334 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4335 : ObjCObjectType(Nonce_ObjCInterface), 4336 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4337 friend class ASTContext; // ASTContext creates these. 4338 friend class ASTReader; 4339 friend class ObjCInterfaceDecl; 4340 4341public: 4342 /// getDecl - Get the declaration of this interface. 4343 ObjCInterfaceDecl *getDecl() const { return Decl; } 4344 4345 bool isSugared() const { return false; } 4346 QualType desugar() const { return QualType(this, 0); } 4347 4348 static bool classof(const Type *T) { 4349 return T->getTypeClass() == ObjCInterface; 4350 } 4351 4352 // Nonsense to "hide" certain members of ObjCObjectType within this 4353 // class. People asking for protocols on an ObjCInterfaceType are 4354 // not going to get what they want: ObjCInterfaceTypes are 4355 // guaranteed to have no protocols. 4356 enum { 4357 qual_iterator, 4358 qual_begin, 4359 qual_end, 4360 getNumProtocols, 4361 getProtocol 4362 }; 4363}; 4364 4365inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4366 if (const ObjCInterfaceType *T = 4367 getBaseType()->getAs<ObjCInterfaceType>()) 4368 return T->getDecl(); 4369 return 0; 4370} 4371 4372/// ObjCObjectPointerType - Used to represent a pointer to an 4373/// Objective C object. These are constructed from pointer 4374/// declarators when the pointee type is an ObjCObjectType (or sugar 4375/// for one). In addition, the 'id' and 'Class' types are typedefs 4376/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4377/// are translated into these. 4378/// 4379/// Pointers to pointers to Objective C objects are still PointerTypes; 4380/// only the first level of pointer gets it own type implementation. 4381class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4382 QualType PointeeType; 4383 4384 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4385 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4386 PointeeType(Pointee) {} 4387 friend class ASTContext; // ASTContext creates these. 4388 4389public: 4390 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4391 /// The result will always be an ObjCObjectType or sugar thereof. 4392 QualType getPointeeType() const { return PointeeType; } 4393 4394 /// getObjCObjectType - Gets the type pointed to by this ObjC 4395 /// pointer. This method always returns non-null. 4396 /// 4397 /// This method is equivalent to getPointeeType() except that 4398 /// it discards any typedefs (or other sugar) between this 4399 /// type and the "outermost" object type. So for: 4400 /// \code 4401 /// \@class A; \@protocol P; \@protocol Q; 4402 /// typedef A<P> AP; 4403 /// typedef A A1; 4404 /// typedef A1<P> A1P; 4405 /// typedef A1P<Q> A1PQ; 4406 /// \endcode 4407 /// For 'A*', getObjectType() will return 'A'. 4408 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4409 /// For 'AP*', getObjectType() will return 'A<P>'. 4410 /// For 'A1*', getObjectType() will return 'A'. 4411 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4412 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4413 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4414 /// adding protocols to a protocol-qualified base discards the 4415 /// old qualifiers (for now). But if it didn't, getObjectType() 4416 /// would return 'A1P<Q>' (and we'd have to make iterating over 4417 /// qualifiers more complicated). 4418 const ObjCObjectType *getObjectType() const { 4419 return PointeeType->castAs<ObjCObjectType>(); 4420 } 4421 4422 /// getInterfaceType - If this pointer points to an Objective C 4423 /// \@interface type, gets the type for that interface. Any protocol 4424 /// qualifiers on the interface are ignored. 4425 /// 4426 /// \return null if the base type for this pointer is 'id' or 'Class' 4427 const ObjCInterfaceType *getInterfaceType() const { 4428 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4429 } 4430 4431 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4432 /// type, gets the declaration for that interface. 4433 /// 4434 /// \return null if the base type for this pointer is 'id' or 'Class' 4435 ObjCInterfaceDecl *getInterfaceDecl() const { 4436 return getObjectType()->getInterface(); 4437 } 4438 4439 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4440 /// its object type is the primitive 'id' type with no protocols. 4441 bool isObjCIdType() const { 4442 return getObjectType()->isObjCUnqualifiedId(); 4443 } 4444 4445 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4446 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4447 bool isObjCClassType() const { 4448 return getObjectType()->isObjCUnqualifiedClass(); 4449 } 4450 4451 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4452 /// non-empty set of protocols. 4453 bool isObjCQualifiedIdType() const { 4454 return getObjectType()->isObjCQualifiedId(); 4455 } 4456 4457 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4458 /// some non-empty set of protocols. 4459 bool isObjCQualifiedClassType() const { 4460 return getObjectType()->isObjCQualifiedClass(); 4461 } 4462 4463 /// An iterator over the qualifiers on the object type. Provided 4464 /// for convenience. This will always iterate over the full set of 4465 /// protocols on a type, not just those provided directly. 4466 typedef ObjCObjectType::qual_iterator qual_iterator; 4467 4468 qual_iterator qual_begin() const { 4469 return getObjectType()->qual_begin(); 4470 } 4471 qual_iterator qual_end() const { 4472 return getObjectType()->qual_end(); 4473 } 4474 bool qual_empty() const { return getObjectType()->qual_empty(); } 4475 4476 /// getNumProtocols - Return the number of qualifying protocols on 4477 /// the object type. 4478 unsigned getNumProtocols() const { 4479 return getObjectType()->getNumProtocols(); 4480 } 4481 4482 /// \brief Retrieve a qualifying protocol by index on the object 4483 /// type. 4484 ObjCProtocolDecl *getProtocol(unsigned I) const { 4485 return getObjectType()->getProtocol(I); 4486 } 4487 4488 bool isSugared() const { return false; } 4489 QualType desugar() const { return QualType(this, 0); } 4490 4491 void Profile(llvm::FoldingSetNodeID &ID) { 4492 Profile(ID, getPointeeType()); 4493 } 4494 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4495 ID.AddPointer(T.getAsOpaquePtr()); 4496 } 4497 static bool classof(const Type *T) { 4498 return T->getTypeClass() == ObjCObjectPointer; 4499 } 4500}; 4501 4502class AtomicType : public Type, public llvm::FoldingSetNode { 4503 QualType ValueType; 4504 4505 AtomicType(QualType ValTy, QualType Canonical) 4506 : Type(Atomic, Canonical, ValTy->isDependentType(), 4507 ValTy->isInstantiationDependentType(), 4508 ValTy->isVariablyModifiedType(), 4509 ValTy->containsUnexpandedParameterPack()), 4510 ValueType(ValTy) {} 4511 friend class ASTContext; // ASTContext creates these. 4512 4513 public: 4514 /// getValueType - Gets the type contained by this atomic type, i.e. 4515 /// the type returned by performing an atomic load of this atomic type. 4516 QualType getValueType() const { return ValueType; } 4517 4518 bool isSugared() const { return false; } 4519 QualType desugar() const { return QualType(this, 0); } 4520 4521 void Profile(llvm::FoldingSetNodeID &ID) { 4522 Profile(ID, getValueType()); 4523 } 4524 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4525 ID.AddPointer(T.getAsOpaquePtr()); 4526 } 4527 static bool classof(const Type *T) { 4528 return T->getTypeClass() == Atomic; 4529 } 4530}; 4531 4532/// A qualifier set is used to build a set of qualifiers. 4533class QualifierCollector : public Qualifiers { 4534public: 4535 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4536 4537 /// Collect any qualifiers on the given type and return an 4538 /// unqualified type. The qualifiers are assumed to be consistent 4539 /// with those already in the type. 4540 const Type *strip(QualType type) { 4541 addFastQualifiers(type.getLocalFastQualifiers()); 4542 if (!type.hasLocalNonFastQualifiers()) 4543 return type.getTypePtrUnsafe(); 4544 4545 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4546 addConsistentQualifiers(extQuals->getQualifiers()); 4547 return extQuals->getBaseType(); 4548 } 4549 4550 /// Apply the collected qualifiers to the given type. 4551 QualType apply(const ASTContext &Context, QualType QT) const; 4552 4553 /// Apply the collected qualifiers to the given type. 4554 QualType apply(const ASTContext &Context, const Type* T) const; 4555}; 4556 4557 4558// Inline function definitions. 4559 4560inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4561 SplitQualType desugar = 4562 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4563 desugar.Quals.addConsistentQualifiers(Quals); 4564 return desugar; 4565} 4566 4567inline const Type *QualType::getTypePtr() const { 4568 return getCommonPtr()->BaseType; 4569} 4570 4571inline const Type *QualType::getTypePtrOrNull() const { 4572 return (isNull() ? 0 : getCommonPtr()->BaseType); 4573} 4574 4575inline SplitQualType QualType::split() const { 4576 if (!hasLocalNonFastQualifiers()) 4577 return SplitQualType(getTypePtrUnsafe(), 4578 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4579 4580 const ExtQuals *eq = getExtQualsUnsafe(); 4581 Qualifiers qs = eq->getQualifiers(); 4582 qs.addFastQualifiers(getLocalFastQualifiers()); 4583 return SplitQualType(eq->getBaseType(), qs); 4584} 4585 4586inline Qualifiers QualType::getLocalQualifiers() const { 4587 Qualifiers Quals; 4588 if (hasLocalNonFastQualifiers()) 4589 Quals = getExtQualsUnsafe()->getQualifiers(); 4590 Quals.addFastQualifiers(getLocalFastQualifiers()); 4591 return Quals; 4592} 4593 4594inline Qualifiers QualType::getQualifiers() const { 4595 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4596 quals.addFastQualifiers(getLocalFastQualifiers()); 4597 return quals; 4598} 4599 4600inline unsigned QualType::getCVRQualifiers() const { 4601 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4602 cvr |= getLocalCVRQualifiers(); 4603 return cvr; 4604} 4605 4606inline QualType QualType::getCanonicalType() const { 4607 QualType canon = getCommonPtr()->CanonicalType; 4608 return canon.withFastQualifiers(getLocalFastQualifiers()); 4609} 4610 4611inline bool QualType::isCanonical() const { 4612 return getTypePtr()->isCanonicalUnqualified(); 4613} 4614 4615inline bool QualType::isCanonicalAsParam() const { 4616 if (!isCanonical()) return false; 4617 if (hasLocalQualifiers()) return false; 4618 4619 const Type *T = getTypePtr(); 4620 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4621 return false; 4622 4623 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4624} 4625 4626inline bool QualType::isConstQualified() const { 4627 return isLocalConstQualified() || 4628 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4629} 4630 4631inline bool QualType::isRestrictQualified() const { 4632 return isLocalRestrictQualified() || 4633 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4634} 4635 4636 4637inline bool QualType::isVolatileQualified() const { 4638 return isLocalVolatileQualified() || 4639 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4640} 4641 4642inline bool QualType::hasQualifiers() const { 4643 return hasLocalQualifiers() || 4644 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4645} 4646 4647inline QualType QualType::getUnqualifiedType() const { 4648 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4649 return QualType(getTypePtr(), 0); 4650 4651 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4652} 4653 4654inline SplitQualType QualType::getSplitUnqualifiedType() const { 4655 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4656 return split(); 4657 4658 return getSplitUnqualifiedTypeImpl(*this); 4659} 4660 4661inline void QualType::removeLocalConst() { 4662 removeLocalFastQualifiers(Qualifiers::Const); 4663} 4664 4665inline void QualType::removeLocalRestrict() { 4666 removeLocalFastQualifiers(Qualifiers::Restrict); 4667} 4668 4669inline void QualType::removeLocalVolatile() { 4670 removeLocalFastQualifiers(Qualifiers::Volatile); 4671} 4672 4673inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4674 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4675 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4676 4677 // Fast path: we don't need to touch the slow qualifiers. 4678 removeLocalFastQualifiers(Mask); 4679} 4680 4681/// getAddressSpace - Return the address space of this type. 4682inline unsigned QualType::getAddressSpace() const { 4683 return getQualifiers().getAddressSpace(); 4684} 4685 4686/// getObjCGCAttr - Return the gc attribute of this type. 4687inline Qualifiers::GC QualType::getObjCGCAttr() const { 4688 return getQualifiers().getObjCGCAttr(); 4689} 4690 4691inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4692 if (const PointerType *PT = t.getAs<PointerType>()) { 4693 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4694 return FT->getExtInfo(); 4695 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4696 return FT->getExtInfo(); 4697 4698 return FunctionType::ExtInfo(); 4699} 4700 4701inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4702 return getFunctionExtInfo(*t); 4703} 4704 4705/// isMoreQualifiedThan - Determine whether this type is more 4706/// qualified than the Other type. For example, "const volatile int" 4707/// is more qualified than "const int", "volatile int", and 4708/// "int". However, it is not more qualified than "const volatile 4709/// int". 4710inline bool QualType::isMoreQualifiedThan(QualType other) const { 4711 Qualifiers myQuals = getQualifiers(); 4712 Qualifiers otherQuals = other.getQualifiers(); 4713 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4714} 4715 4716/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4717/// as qualified as the Other type. For example, "const volatile 4718/// int" is at least as qualified as "const int", "volatile int", 4719/// "int", and "const volatile int". 4720inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4721 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4722} 4723 4724/// getNonReferenceType - If Type is a reference type (e.g., const 4725/// int&), returns the type that the reference refers to ("const 4726/// int"). Otherwise, returns the type itself. This routine is used 4727/// throughout Sema to implement C++ 5p6: 4728/// 4729/// If an expression initially has the type "reference to T" (8.3.2, 4730/// 8.5.3), the type is adjusted to "T" prior to any further 4731/// analysis, the expression designates the object or function 4732/// denoted by the reference, and the expression is an lvalue. 4733inline QualType QualType::getNonReferenceType() const { 4734 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4735 return RefType->getPointeeType(); 4736 else 4737 return *this; 4738} 4739 4740inline bool QualType::isCForbiddenLValueType() const { 4741 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4742 getTypePtr()->isFunctionType()); 4743} 4744 4745/// \brief Tests whether the type is categorized as a fundamental type. 4746/// 4747/// \returns True for types specified in C++0x [basic.fundamental]. 4748inline bool Type::isFundamentalType() const { 4749 return isVoidType() || 4750 // FIXME: It's really annoying that we don't have an 4751 // 'isArithmeticType()' which agrees with the standard definition. 4752 (isArithmeticType() && !isEnumeralType()); 4753} 4754 4755/// \brief Tests whether the type is categorized as a compound type. 4756/// 4757/// \returns True for types specified in C++0x [basic.compound]. 4758inline bool Type::isCompoundType() const { 4759 // C++0x [basic.compound]p1: 4760 // Compound types can be constructed in the following ways: 4761 // -- arrays of objects of a given type [...]; 4762 return isArrayType() || 4763 // -- functions, which have parameters of given types [...]; 4764 isFunctionType() || 4765 // -- pointers to void or objects or functions [...]; 4766 isPointerType() || 4767 // -- references to objects or functions of a given type. [...] 4768 isReferenceType() || 4769 // -- classes containing a sequence of objects of various types, [...]; 4770 isRecordType() || 4771 // -- unions, which are classes capable of containing objects of different 4772 // types at different times; 4773 isUnionType() || 4774 // -- enumerations, which comprise a set of named constant values. [...]; 4775 isEnumeralType() || 4776 // -- pointers to non-static class members, [...]. 4777 isMemberPointerType(); 4778} 4779 4780inline bool Type::isFunctionType() const { 4781 return isa<FunctionType>(CanonicalType); 4782} 4783inline bool Type::isPointerType() const { 4784 return isa<PointerType>(CanonicalType); 4785} 4786inline bool Type::isAnyPointerType() const { 4787 return isPointerType() || isObjCObjectPointerType(); 4788} 4789inline bool Type::isBlockPointerType() const { 4790 return isa<BlockPointerType>(CanonicalType); 4791} 4792inline bool Type::isReferenceType() const { 4793 return isa<ReferenceType>(CanonicalType); 4794} 4795inline bool Type::isLValueReferenceType() const { 4796 return isa<LValueReferenceType>(CanonicalType); 4797} 4798inline bool Type::isRValueReferenceType() const { 4799 return isa<RValueReferenceType>(CanonicalType); 4800} 4801inline bool Type::isFunctionPointerType() const { 4802 if (const PointerType *T = getAs<PointerType>()) 4803 return T->getPointeeType()->isFunctionType(); 4804 else 4805 return false; 4806} 4807inline bool Type::isMemberPointerType() const { 4808 return isa<MemberPointerType>(CanonicalType); 4809} 4810inline bool Type::isMemberFunctionPointerType() const { 4811 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4812 return T->isMemberFunctionPointer(); 4813 else 4814 return false; 4815} 4816inline bool Type::isMemberDataPointerType() const { 4817 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4818 return T->isMemberDataPointer(); 4819 else 4820 return false; 4821} 4822inline bool Type::isArrayType() const { 4823 return isa<ArrayType>(CanonicalType); 4824} 4825inline bool Type::isConstantArrayType() const { 4826 return isa<ConstantArrayType>(CanonicalType); 4827} 4828inline bool Type::isIncompleteArrayType() const { 4829 return isa<IncompleteArrayType>(CanonicalType); 4830} 4831inline bool Type::isVariableArrayType() const { 4832 return isa<VariableArrayType>(CanonicalType); 4833} 4834inline bool Type::isDependentSizedArrayType() const { 4835 return isa<DependentSizedArrayType>(CanonicalType); 4836} 4837inline bool Type::isBuiltinType() const { 4838 return isa<BuiltinType>(CanonicalType); 4839} 4840inline bool Type::isRecordType() const { 4841 return isa<RecordType>(CanonicalType); 4842} 4843inline bool Type::isEnumeralType() const { 4844 return isa<EnumType>(CanonicalType); 4845} 4846inline bool Type::isAnyComplexType() const { 4847 return isa<ComplexType>(CanonicalType); 4848} 4849inline bool Type::isVectorType() const { 4850 return isa<VectorType>(CanonicalType); 4851} 4852inline bool Type::isExtVectorType() const { 4853 return isa<ExtVectorType>(CanonicalType); 4854} 4855inline bool Type::isObjCObjectPointerType() const { 4856 return isa<ObjCObjectPointerType>(CanonicalType); 4857} 4858inline bool Type::isObjCObjectType() const { 4859 return isa<ObjCObjectType>(CanonicalType); 4860} 4861inline bool Type::isObjCObjectOrInterfaceType() const { 4862 return isa<ObjCInterfaceType>(CanonicalType) || 4863 isa<ObjCObjectType>(CanonicalType); 4864} 4865inline bool Type::isAtomicType() const { 4866 return isa<AtomicType>(CanonicalType); 4867} 4868 4869inline bool Type::isObjCQualifiedIdType() const { 4870 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4871 return OPT->isObjCQualifiedIdType(); 4872 return false; 4873} 4874inline bool Type::isObjCQualifiedClassType() const { 4875 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4876 return OPT->isObjCQualifiedClassType(); 4877 return false; 4878} 4879inline bool Type::isObjCIdType() const { 4880 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4881 return OPT->isObjCIdType(); 4882 return false; 4883} 4884inline bool Type::isObjCClassType() const { 4885 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4886 return OPT->isObjCClassType(); 4887 return false; 4888} 4889inline bool Type::isObjCSelType() const { 4890 if (const PointerType *OPT = getAs<PointerType>()) 4891 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4892 return false; 4893} 4894inline bool Type::isObjCBuiltinType() const { 4895 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4896} 4897 4898inline bool Type::isImage1dT() const { 4899 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4900} 4901 4902inline bool Type::isImage1dArrayT() const { 4903 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4904} 4905 4906inline bool Type::isImage1dBufferT() const { 4907 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4908} 4909 4910inline bool Type::isImage2dT() const { 4911 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4912} 4913 4914inline bool Type::isImage2dArrayT() const { 4915 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4916} 4917 4918inline bool Type::isImage3dT() const { 4919 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4920} 4921inline bool Type::isEventT() const { 4922 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4923} 4924 4925inline bool Type::isImageType() const { 4926 return isImage3dT() || 4927 isImage2dT() || isImage2dArrayT() || 4928 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4929} 4930 4931inline bool Type::isOpenCLSpecificType() const { 4932 return isImageType() || isEventT(); 4933} 4934 4935inline bool Type::isTemplateTypeParmType() const { 4936 return isa<TemplateTypeParmType>(CanonicalType); 4937} 4938 4939inline bool Type::isSpecificBuiltinType(unsigned K) const { 4940 if (const BuiltinType *BT = getAs<BuiltinType>()) 4941 if (BT->getKind() == (BuiltinType::Kind) K) 4942 return true; 4943 return false; 4944} 4945 4946inline bool Type::isPlaceholderType() const { 4947 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4948 return BT->isPlaceholderType(); 4949 return false; 4950} 4951 4952inline const BuiltinType *Type::getAsPlaceholderType() const { 4953 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4954 if (BT->isPlaceholderType()) 4955 return BT; 4956 return 0; 4957} 4958 4959inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4960 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4961 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4962 return (BT->getKind() == (BuiltinType::Kind) K); 4963 return false; 4964} 4965 4966inline bool Type::isNonOverloadPlaceholderType() const { 4967 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4968 return BT->isNonOverloadPlaceholderType(); 4969 return false; 4970} 4971 4972inline bool Type::isVoidType() const { 4973 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4974 return BT->getKind() == BuiltinType::Void; 4975 return false; 4976} 4977 4978inline bool Type::isHalfType() const { 4979 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4980 return BT->getKind() == BuiltinType::Half; 4981 // FIXME: Should we allow complex __fp16? Probably not. 4982 return false; 4983} 4984 4985inline bool Type::isNullPtrType() const { 4986 if (const BuiltinType *BT = getAs<BuiltinType>()) 4987 return BT->getKind() == BuiltinType::NullPtr; 4988 return false; 4989} 4990 4991extern bool IsEnumDeclComplete(EnumDecl *); 4992extern bool IsEnumDeclScoped(EnumDecl *); 4993 4994inline bool Type::isIntegerType() const { 4995 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4996 return BT->getKind() >= BuiltinType::Bool && 4997 BT->getKind() <= BuiltinType::Int128; 4998 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4999 // Incomplete enum types are not treated as integer types. 5000 // FIXME: In C++, enum types are never integer types. 5001 return IsEnumDeclComplete(ET->getDecl()) && 5002 !IsEnumDeclScoped(ET->getDecl()); 5003 } 5004 return false; 5005} 5006 5007inline bool Type::isScalarType() const { 5008 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5009 return BT->getKind() > BuiltinType::Void && 5010 BT->getKind() <= BuiltinType::NullPtr; 5011 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5012 // Enums are scalar types, but only if they are defined. Incomplete enums 5013 // are not treated as scalar types. 5014 return IsEnumDeclComplete(ET->getDecl()); 5015 return isa<PointerType>(CanonicalType) || 5016 isa<BlockPointerType>(CanonicalType) || 5017 isa<MemberPointerType>(CanonicalType) || 5018 isa<ComplexType>(CanonicalType) || 5019 isa<ObjCObjectPointerType>(CanonicalType); 5020} 5021 5022inline bool Type::isIntegralOrEnumerationType() const { 5023 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5024 return BT->getKind() >= BuiltinType::Bool && 5025 BT->getKind() <= BuiltinType::Int128; 5026 5027 // Check for a complete enum type; incomplete enum types are not properly an 5028 // enumeration type in the sense required here. 5029 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5030 return IsEnumDeclComplete(ET->getDecl()); 5031 5032 return false; 5033} 5034 5035inline bool Type::isBooleanType() const { 5036 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5037 return BT->getKind() == BuiltinType::Bool; 5038 return false; 5039} 5040 5041/// \brief Determines whether this is a type for which one can define 5042/// an overloaded operator. 5043inline bool Type::isOverloadableType() const { 5044 return isDependentType() || isRecordType() || isEnumeralType(); 5045} 5046 5047/// \brief Determines whether this type can decay to a pointer type. 5048inline bool Type::canDecayToPointerType() const { 5049 return isFunctionType() || isArrayType(); 5050} 5051 5052inline bool Type::hasPointerRepresentation() const { 5053 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5054 isObjCObjectPointerType() || isNullPtrType()); 5055} 5056 5057inline bool Type::hasObjCPointerRepresentation() const { 5058 return isObjCObjectPointerType(); 5059} 5060 5061inline const Type *Type::getBaseElementTypeUnsafe() const { 5062 const Type *type = this; 5063 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5064 type = arrayType->getElementType().getTypePtr(); 5065 return type; 5066} 5067 5068/// Insertion operator for diagnostics. This allows sending QualType's into a 5069/// diagnostic with <<. 5070inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5071 QualType T) { 5072 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5073 DiagnosticsEngine::ak_qualtype); 5074 return DB; 5075} 5076 5077/// Insertion operator for partial diagnostics. This allows sending QualType's 5078/// into a diagnostic with <<. 5079inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5080 QualType T) { 5081 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5082 DiagnosticsEngine::ak_qualtype); 5083 return PD; 5084} 5085 5086// Helper class template that is used by Type::getAs to ensure that one does 5087// not try to look through a qualified type to get to an array type. 5088template<typename T, 5089 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5090 llvm::is_base_of<ArrayType, T>::value)> 5091struct ArrayType_cannot_be_used_with_getAs { }; 5092 5093template<typename T> 5094struct ArrayType_cannot_be_used_with_getAs<T, true>; 5095 5096// Member-template getAs<specific type>'. 5097template <typename T> const T *Type::getAs() const { 5098 ArrayType_cannot_be_used_with_getAs<T> at; 5099 (void)at; 5100 5101 // If this is directly a T type, return it. 5102 if (const T *Ty = dyn_cast<T>(this)) 5103 return Ty; 5104 5105 // If the canonical form of this type isn't the right kind, reject it. 5106 if (!isa<T>(CanonicalType)) 5107 return 0; 5108 5109 // If this is a typedef for the type, strip the typedef off without 5110 // losing all typedef information. 5111 return cast<T>(getUnqualifiedDesugaredType()); 5112} 5113 5114inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5115 // If this is directly an array type, return it. 5116 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5117 return arr; 5118 5119 // If the canonical form of this type isn't the right kind, reject it. 5120 if (!isa<ArrayType>(CanonicalType)) 5121 return 0; 5122 5123 // If this is a typedef for the type, strip the typedef off without 5124 // losing all typedef information. 5125 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5126} 5127 5128template <typename T> const T *Type::castAs() const { 5129 ArrayType_cannot_be_used_with_getAs<T> at; 5130 (void) at; 5131 5132 assert(isa<T>(CanonicalType)); 5133 if (const T *ty = dyn_cast<T>(this)) return ty; 5134 return cast<T>(getUnqualifiedDesugaredType()); 5135} 5136 5137inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5138 assert(isa<ArrayType>(CanonicalType)); 5139 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5140 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5141} 5142 5143} // end namespace clang 5144 5145#endif 5146