Type.h revision 361ae9a83e1e3098adabaaad34d0925b30358f38
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/Basic/Diagnostic.h" 18#include "clang/Basic/ExceptionSpecificationType.h" 19#include "clang/Basic/IdentifierTable.h" 20#include "clang/Basic/Linkage.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/Visibility.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/TemplateName.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/Support/ErrorHandling.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 "clang/Basic/LLVM.h" 33 34namespace clang { 35 enum { 36 TypeAlignmentInBits = 4, 37 TypeAlignment = 1 << TypeAlignmentInBits 38 }; 39 class Type; 40 class ExtQuals; 41 class QualType; 42} 43 44namespace llvm { 45 template <typename T> 46 class PointerLikeTypeTraits; 47 template<> 48 class PointerLikeTypeTraits< ::clang::Type*> { 49 public: 50 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 51 static inline ::clang::Type *getFromVoidPointer(void *P) { 52 return static_cast< ::clang::Type*>(P); 53 } 54 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 55 }; 56 template<> 57 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 58 public: 59 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 60 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 61 return static_cast< ::clang::ExtQuals*>(P); 62 } 63 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 64 }; 65 66 template <> 67 struct isPodLike<clang::QualType> { static const bool value = true; }; 68} 69 70namespace clang { 71 class ASTContext; 72 class TypedefNameDecl; 73 class TemplateDecl; 74 class TemplateTypeParmDecl; 75 class NonTypeTemplateParmDecl; 76 class TemplateTemplateParmDecl; 77 class TagDecl; 78 class RecordDecl; 79 class CXXRecordDecl; 80 class EnumDecl; 81 class FieldDecl; 82 class ObjCInterfaceDecl; 83 class ObjCProtocolDecl; 84 class ObjCMethodDecl; 85 class UnresolvedUsingTypenameDecl; 86 class Expr; 87 class Stmt; 88 class SourceLocation; 89 class StmtIteratorBase; 90 class TemplateArgument; 91 class TemplateArgumentLoc; 92 class TemplateArgumentListInfo; 93 class ElaboratedType; 94 class ExtQuals; 95 class ExtQualsTypeCommonBase; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum ObjCLifetime { 126 /// There is no lifetime qualification on this type. 127 OCL_None, 128 129 /// This object can be modified without requiring retains or 130 /// releases. 131 OCL_ExplicitNone, 132 133 /// Assigning into this object requires the old value to be 134 /// released and the new value to be retained. The timing of the 135 /// release of the old value is inexact: it may be moved to 136 /// immediately after the last known point where the value is 137 /// live. 138 OCL_Strong, 139 140 /// Reading or writing from this object requires a barrier call. 141 OCL_Weak, 142 143 /// Assigning into this object requires a lifetime extension. 144 OCL_Autoreleasing 145 }; 146 147 enum { 148 /// The maximum supported address space number. 149 /// 24 bits should be enough for anyone. 150 MaxAddressSpace = 0xffffffu, 151 152 /// The width of the "fast" qualifier mask. 153 FastWidth = 3, 154 155 /// The fast qualifier mask. 156 FastMask = (1 << FastWidth) - 1 157 }; 158 159 Qualifiers() : Mask(0) {} 160 161 static Qualifiers fromFastMask(unsigned Mask) { 162 Qualifiers Qs; 163 Qs.addFastQualifiers(Mask); 164 return Qs; 165 } 166 167 static Qualifiers fromCVRMask(unsigned CVR) { 168 Qualifiers Qs; 169 Qs.addCVRQualifiers(CVR); 170 return Qs; 171 } 172 173 // Deserialize qualifiers from an opaque representation. 174 static Qualifiers fromOpaqueValue(unsigned opaque) { 175 Qualifiers Qs; 176 Qs.Mask = opaque; 177 return Qs; 178 } 179 180 // Serialize these qualifiers into an opaque representation. 181 unsigned getAsOpaqueValue() const { 182 return Mask; 183 } 184 185 bool hasConst() const { return Mask & Const; } 186 void setConst(bool flag) { 187 Mask = (Mask & ~Const) | (flag ? Const : 0); 188 } 189 void removeConst() { Mask &= ~Const; } 190 void addConst() { Mask |= Const; } 191 192 bool hasVolatile() const { return Mask & Volatile; } 193 void setVolatile(bool flag) { 194 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 195 } 196 void removeVolatile() { Mask &= ~Volatile; } 197 void addVolatile() { Mask |= Volatile; } 198 199 bool hasRestrict() const { return Mask & Restrict; } 200 void setRestrict(bool flag) { 201 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 202 } 203 void removeRestrict() { Mask &= ~Restrict; } 204 void addRestrict() { Mask |= Restrict; } 205 206 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 207 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 208 void setCVRQualifiers(unsigned mask) { 209 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 210 Mask = (Mask & ~CVRMask) | mask; 211 } 212 void removeCVRQualifiers(unsigned mask) { 213 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 214 Mask &= ~mask; 215 } 216 void removeCVRQualifiers() { 217 removeCVRQualifiers(CVRMask); 218 } 219 void addCVRQualifiers(unsigned mask) { 220 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 221 Mask |= mask; 222 } 223 224 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 225 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 226 void setObjCGCAttr(GC type) { 227 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 228 } 229 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 230 void addObjCGCAttr(GC type) { 231 assert(type); 232 setObjCGCAttr(type); 233 } 234 Qualifiers withoutObjCGCAttr() const { 235 Qualifiers qs = *this; 236 qs.removeObjCGCAttr(); 237 return qs; 238 } 239 Qualifiers withoutObjCLifetime() const { 240 Qualifiers qs = *this; 241 qs.removeObjCLifetime(); 242 return qs; 243 } 244 245 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 246 ObjCLifetime getObjCLifetime() const { 247 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 248 } 249 void setObjCLifetime(ObjCLifetime type) { 250 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 251 } 252 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 253 void addObjCLifetime(ObjCLifetime type) { 254 assert(type); 255 assert(!hasObjCLifetime()); 256 Mask |= (type << LifetimeShift); 257 } 258 259 /// True if the lifetime is neither None or ExplicitNone. 260 bool hasNonTrivialObjCLifetime() const { 261 ObjCLifetime lifetime = getObjCLifetime(); 262 return (lifetime > OCL_ExplicitNone); 263 } 264 265 /// True if the lifetime is either strong or weak. 266 bool hasStrongOrWeakObjCLifetime() const { 267 ObjCLifetime lifetime = getObjCLifetime(); 268 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 269 } 270 271 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 272 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 273 void setAddressSpace(unsigned space) { 274 assert(space <= MaxAddressSpace); 275 Mask = (Mask & ~AddressSpaceMask) 276 | (((uint32_t) space) << AddressSpaceShift); 277 } 278 void removeAddressSpace() { setAddressSpace(0); } 279 void addAddressSpace(unsigned space) { 280 assert(space); 281 setAddressSpace(space); 282 } 283 284 // Fast qualifiers are those that can be allocated directly 285 // on a QualType object. 286 bool hasFastQualifiers() const { return getFastQualifiers(); } 287 unsigned getFastQualifiers() const { return Mask & FastMask; } 288 void setFastQualifiers(unsigned mask) { 289 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 290 Mask = (Mask & ~FastMask) | mask; 291 } 292 void removeFastQualifiers(unsigned mask) { 293 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 294 Mask &= ~mask; 295 } 296 void removeFastQualifiers() { 297 removeFastQualifiers(FastMask); 298 } 299 void addFastQualifiers(unsigned mask) { 300 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 301 Mask |= mask; 302 } 303 304 /// hasNonFastQualifiers - Return true if the set contains any 305 /// qualifiers which require an ExtQuals node to be allocated. 306 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 307 Qualifiers getNonFastQualifiers() const { 308 Qualifiers Quals = *this; 309 Quals.setFastQualifiers(0); 310 return Quals; 311 } 312 313 /// hasQualifiers - Return true if the set contains any qualifiers. 314 bool hasQualifiers() const { return Mask; } 315 bool empty() const { return !Mask; } 316 317 /// \brief Add the qualifiers from the given set to this set. 318 void addQualifiers(Qualifiers Q) { 319 // If the other set doesn't have any non-boolean qualifiers, just 320 // bit-or it in. 321 if (!(Q.Mask & ~CVRMask)) 322 Mask |= Q.Mask; 323 else { 324 Mask |= (Q.Mask & CVRMask); 325 if (Q.hasAddressSpace()) 326 addAddressSpace(Q.getAddressSpace()); 327 if (Q.hasObjCGCAttr()) 328 addObjCGCAttr(Q.getObjCGCAttr()); 329 if (Q.hasObjCLifetime()) 330 addObjCLifetime(Q.getObjCLifetime()); 331 } 332 } 333 334 /// \brief Add the qualifiers from the given set to this set, given that 335 /// they don't conflict. 336 void addConsistentQualifiers(Qualifiers qs) { 337 assert(getAddressSpace() == qs.getAddressSpace() || 338 !hasAddressSpace() || !qs.hasAddressSpace()); 339 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 340 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 341 assert(getObjCLifetime() == qs.getObjCLifetime() || 342 !hasObjCLifetime() || !qs.hasObjCLifetime()); 343 Mask |= qs.Mask; 344 } 345 346 /// \brief Determines if these qualifiers compatibly include another set. 347 /// Generally this answers the question of whether an object with the other 348 /// qualifiers can be safely used as an object with these qualifiers. 349 bool compatiblyIncludes(Qualifiers other) const { 350 return 351 // Address spaces must match exactly. 352 getAddressSpace() == other.getAddressSpace() && 353 // ObjC GC qualifiers can match, be added, or be removed, but can't be 354 // changed. 355 (getObjCGCAttr() == other.getObjCGCAttr() || 356 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 357 // ObjC lifetime qualifiers must match exactly. 358 getObjCLifetime() == other.getObjCLifetime() && 359 // CVR qualifiers may subset. 360 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 361 } 362 363 /// \brief Determines if these qualifiers compatibly include another set of 364 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 365 /// 366 /// One set of Objective-C lifetime qualifiers compatibly includes the other 367 /// if the lifetime qualifiers match, or if both are non-__weak and the 368 /// including set also contains the 'const' qualifier. 369 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 370 if (getObjCLifetime() == other.getObjCLifetime()) 371 return true; 372 373 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 374 return false; 375 376 return hasConst(); 377 } 378 379 bool isSupersetOf(Qualifiers Other) const; 380 381 /// \brief Determine whether this set of qualifiers is a strict superset of 382 /// another set of qualifiers, not considering qualifier compatibility. 383 bool isStrictSupersetOf(Qualifiers Other) const; 384 385 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 386 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 387 388 operator bool() const { return hasQualifiers(); } 389 390 Qualifiers &operator+=(Qualifiers R) { 391 addQualifiers(R); 392 return *this; 393 } 394 395 // Union two qualifier sets. If an enumerated qualifier appears 396 // in both sets, use the one from the right. 397 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 398 L += R; 399 return L; 400 } 401 402 Qualifiers &operator-=(Qualifiers R) { 403 Mask = Mask & ~(R.Mask); 404 return *this; 405 } 406 407 /// \brief Compute the difference between two qualifier sets. 408 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 409 L -= R; 410 return L; 411 } 412 413 std::string getAsString() const; 414 std::string getAsString(const PrintingPolicy &Policy) const { 415 std::string Buffer; 416 getAsStringInternal(Buffer, Policy); 417 return Buffer; 418 } 419 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 420 421 void Profile(llvm::FoldingSetNodeID &ID) const { 422 ID.AddInteger(Mask); 423 } 424 425private: 426 427 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 428 // |C R V|GCAttr|Lifetime|AddressSpace| 429 uint32_t Mask; 430 431 static const uint32_t GCAttrMask = 0x18; 432 static const uint32_t GCAttrShift = 3; 433 static const uint32_t LifetimeMask = 0xE0; 434 static const uint32_t LifetimeShift = 5; 435 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 436 static const uint32_t AddressSpaceShift = 8; 437}; 438 439/// CallingConv - Specifies the calling convention that a function uses. 440enum CallingConv { 441 CC_Default, 442 CC_C, // __attribute__((cdecl)) 443 CC_X86StdCall, // __attribute__((stdcall)) 444 CC_X86FastCall, // __attribute__((fastcall)) 445 CC_X86ThisCall, // __attribute__((thiscall)) 446 CC_X86Pascal, // __attribute__((pascal)) 447 CC_AAPCS, // __attribute__((pcs("aapcs"))) 448 CC_AAPCS_VFP // __attribute__((pcs("aapcs-vfp"))) 449}; 450 451/// A std::pair-like structure for storing a qualified type split 452/// into its local qualifiers and its locally-unqualified type. 453struct SplitQualType { 454 /// The locally-unqualified type. 455 const Type *Ty; 456 457 /// The local qualifiers. 458 Qualifiers Quals; 459 460 SplitQualType() : Ty(0), Quals() {} 461 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 462 463 SplitQualType getSingleStepDesugaredType() const; // end of this file 464 465 // Make llvm::tie work. 466 operator std::pair<const Type *,Qualifiers>() const { 467 return std::pair<const Type *,Qualifiers>(Ty, Quals); 468 } 469 470 friend bool operator==(SplitQualType a, SplitQualType b) { 471 return a.Ty == b.Ty && a.Quals == b.Quals; 472 } 473 friend bool operator!=(SplitQualType a, SplitQualType b) { 474 return a.Ty != b.Ty || a.Quals != b.Quals; 475 } 476}; 477 478/// QualType - For efficiency, we don't store CV-qualified types as nodes on 479/// their own: instead each reference to a type stores the qualifiers. This 480/// greatly reduces the number of nodes we need to allocate for types (for 481/// example we only need one for 'int', 'const int', 'volatile int', 482/// 'const volatile int', etc). 483/// 484/// As an added efficiency bonus, instead of making this a pair, we 485/// just store the two bits we care about in the low bits of the 486/// pointer. To handle the packing/unpacking, we make QualType be a 487/// simple wrapper class that acts like a smart pointer. A third bit 488/// indicates whether there are extended qualifiers present, in which 489/// case the pointer points to a special structure. 490class QualType { 491 // Thankfully, these are efficiently composable. 492 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 493 Qualifiers::FastWidth> Value; 494 495 const ExtQuals *getExtQualsUnsafe() const { 496 return Value.getPointer().get<const ExtQuals*>(); 497 } 498 499 const Type *getTypePtrUnsafe() const { 500 return Value.getPointer().get<const Type*>(); 501 } 502 503 const ExtQualsTypeCommonBase *getCommonPtr() const { 504 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 505 uintptr_t CommonPtrVal 506 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 507 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 508 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 509 } 510 511 friend class QualifierCollector; 512public: 513 QualType() {} 514 515 QualType(const Type *Ptr, unsigned Quals) 516 : Value(Ptr, Quals) {} 517 QualType(const ExtQuals *Ptr, unsigned Quals) 518 : Value(Ptr, Quals) {} 519 520 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 521 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 522 523 /// Retrieves a pointer to the underlying (unqualified) type. 524 /// This should really return a const Type, but it's not worth 525 /// changing all the users right now. 526 /// 527 /// This function requires that the type not be NULL. If the type might be 528 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 529 const Type *getTypePtr() const; 530 531 const Type *getTypePtrOrNull() const; 532 533 /// Retrieves a pointer to the name of the base type. 534 const IdentifierInfo *getBaseTypeIdentifier() const; 535 536 /// Divides a QualType into its unqualified type and a set of local 537 /// qualifiers. 538 SplitQualType split() const; 539 540 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 541 static QualType getFromOpaquePtr(const void *Ptr) { 542 QualType T; 543 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 544 return T; 545 } 546 547 const Type &operator*() const { 548 return *getTypePtr(); 549 } 550 551 const Type *operator->() const { 552 return getTypePtr(); 553 } 554 555 bool isCanonical() const; 556 bool isCanonicalAsParam() const; 557 558 /// isNull - Return true if this QualType doesn't point to a type yet. 559 bool isNull() const { 560 return Value.getPointer().isNull(); 561 } 562 563 /// \brief Determine whether this particular QualType instance has the 564 /// "const" qualifier set, without looking through typedefs that may have 565 /// added "const" at a different level. 566 bool isLocalConstQualified() const { 567 return (getLocalFastQualifiers() & Qualifiers::Const); 568 } 569 570 /// \brief Determine whether this type is const-qualified. 571 bool isConstQualified() const; 572 573 /// \brief Determine whether this particular QualType instance has the 574 /// "restrict" qualifier set, without looking through typedefs that may have 575 /// added "restrict" at a different level. 576 bool isLocalRestrictQualified() const { 577 return (getLocalFastQualifiers() & Qualifiers::Restrict); 578 } 579 580 /// \brief Determine whether this type is restrict-qualified. 581 bool isRestrictQualified() const; 582 583 /// \brief Determine whether this particular QualType instance has the 584 /// "volatile" qualifier set, without looking through typedefs that may have 585 /// added "volatile" at a different level. 586 bool isLocalVolatileQualified() const { 587 return (getLocalFastQualifiers() & Qualifiers::Volatile); 588 } 589 590 /// \brief Determine whether this type is volatile-qualified. 591 bool isVolatileQualified() const; 592 593 /// \brief Determine whether this particular QualType instance has any 594 /// qualifiers, without looking through any typedefs that might add 595 /// qualifiers at a different level. 596 bool hasLocalQualifiers() const { 597 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 598 } 599 600 /// \brief Determine whether this type has any qualifiers. 601 bool hasQualifiers() const; 602 603 /// \brief Determine whether this particular QualType instance has any 604 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 605 /// instance. 606 bool hasLocalNonFastQualifiers() const { 607 return Value.getPointer().is<const ExtQuals*>(); 608 } 609 610 /// \brief Retrieve the set of qualifiers local to this particular QualType 611 /// instance, not including any qualifiers acquired through typedefs or 612 /// other sugar. 613 Qualifiers getLocalQualifiers() const; 614 615 /// \brief Retrieve the set of qualifiers applied to this type. 616 Qualifiers getQualifiers() const; 617 618 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 619 /// local to this particular QualType instance, not including any qualifiers 620 /// acquired through typedefs or other sugar. 621 unsigned getLocalCVRQualifiers() const { 622 return getLocalFastQualifiers(); 623 } 624 625 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 626 /// applied to this type. 627 unsigned getCVRQualifiers() const; 628 629 bool isConstant(ASTContext& Ctx) const { 630 return QualType::isConstant(*this, Ctx); 631 } 632 633 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 634 bool isPODType(ASTContext &Context) const; 635 636 /// isCXX11PODType() - Return true if this is a POD type according to the 637 /// more relaxed rules of the C++11 standard, regardless of the current 638 /// compilation's language. 639 /// (C++0x [basic.types]p9) 640 bool isCXX11PODType(ASTContext &Context) const; 641 642 /// isTrivialType - Return true if this is a trivial type 643 /// (C++0x [basic.types]p9) 644 bool isTrivialType(ASTContext &Context) const; 645 646 /// isTriviallyCopyableType - Return true if this is a trivially 647 /// copyable type (C++0x [basic.types]p9) 648 bool isTriviallyCopyableType(ASTContext &Context) const; 649 650 // Don't promise in the API that anything besides 'const' can be 651 // easily added. 652 653 /// addConst - add the specified type qualifier to this QualType. 654 void addConst() { 655 addFastQualifiers(Qualifiers::Const); 656 } 657 QualType withConst() const { 658 return withFastQualifiers(Qualifiers::Const); 659 } 660 661 /// addVolatile - add the specified type qualifier to this QualType. 662 void addVolatile() { 663 addFastQualifiers(Qualifiers::Volatile); 664 } 665 QualType withVolatile() const { 666 return withFastQualifiers(Qualifiers::Volatile); 667 } 668 669 /// Add the restrict qualifier to this QualType. 670 void addRestrict() { 671 addFastQualifiers(Qualifiers::Restrict); 672 } 673 QualType withRestrict() const { 674 return withFastQualifiers(Qualifiers::Restrict); 675 } 676 677 QualType withCVRQualifiers(unsigned CVR) const { 678 return withFastQualifiers(CVR); 679 } 680 681 void addFastQualifiers(unsigned TQs) { 682 assert(!(TQs & ~Qualifiers::FastMask) 683 && "non-fast qualifier bits set in mask!"); 684 Value.setInt(Value.getInt() | TQs); 685 } 686 687 void removeLocalConst(); 688 void removeLocalVolatile(); 689 void removeLocalRestrict(); 690 void removeLocalCVRQualifiers(unsigned Mask); 691 692 void removeLocalFastQualifiers() { Value.setInt(0); } 693 void removeLocalFastQualifiers(unsigned Mask) { 694 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 695 Value.setInt(Value.getInt() & ~Mask); 696 } 697 698 // Creates a type with the given qualifiers in addition to any 699 // qualifiers already on this type. 700 QualType withFastQualifiers(unsigned TQs) const { 701 QualType T = *this; 702 T.addFastQualifiers(TQs); 703 return T; 704 } 705 706 // Creates a type with exactly the given fast qualifiers, removing 707 // any existing fast qualifiers. 708 QualType withExactLocalFastQualifiers(unsigned TQs) const { 709 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 710 } 711 712 // Removes fast qualifiers, but leaves any extended qualifiers in place. 713 QualType withoutLocalFastQualifiers() const { 714 QualType T = *this; 715 T.removeLocalFastQualifiers(); 716 return T; 717 } 718 719 QualType getCanonicalType() const; 720 721 /// \brief Return this type with all of the instance-specific qualifiers 722 /// removed, but without removing any qualifiers that may have been applied 723 /// through typedefs. 724 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 725 726 /// \brief Retrieve the unqualified variant of the given type, 727 /// removing as little sugar as possible. 728 /// 729 /// This routine looks through various kinds of sugar to find the 730 /// least-desugared type that is unqualified. For example, given: 731 /// 732 /// \code 733 /// typedef int Integer; 734 /// typedef const Integer CInteger; 735 /// typedef CInteger DifferenceType; 736 /// \endcode 737 /// 738 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 739 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 740 /// 741 /// The resulting type might still be qualified if it's an array 742 /// type. To strip qualifiers even from within an array type, use 743 /// ASTContext::getUnqualifiedArrayType. 744 inline QualType getUnqualifiedType() const; 745 746 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 747 /// given type, removing as little sugar as possible. 748 /// 749 /// Like getUnqualifiedType(), but also returns the set of 750 /// qualifiers that were built up. 751 /// 752 /// The resulting type might still be qualified if it's an array 753 /// type. To strip qualifiers even from within an array type, use 754 /// ASTContext::getUnqualifiedArrayType. 755 inline SplitQualType getSplitUnqualifiedType() const; 756 757 /// \brief Determine whether this type is more qualified than the other 758 /// given type, requiring exact equality for non-CVR qualifiers. 759 bool isMoreQualifiedThan(QualType Other) const; 760 761 /// \brief Determine whether this type is at least as qualified as the other 762 /// given type, requiring exact equality for non-CVR qualifiers. 763 bool isAtLeastAsQualifiedAs(QualType Other) const; 764 765 QualType getNonReferenceType() const; 766 767 /// \brief Determine the type of a (typically non-lvalue) expression with the 768 /// specified result type. 769 /// 770 /// This routine should be used for expressions for which the return type is 771 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 772 /// an lvalue. It removes a top-level reference (since there are no 773 /// expressions of reference type) and deletes top-level cvr-qualifiers 774 /// from non-class types (in C++) or all types (in C). 775 QualType getNonLValueExprType(ASTContext &Context) const; 776 777 /// getDesugaredType - Return the specified type with any "sugar" removed from 778 /// the type. This takes off typedefs, typeof's etc. If the outer level of 779 /// the type is already concrete, it returns it unmodified. This is similar 780 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 781 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 782 /// concrete. 783 /// 784 /// Qualifiers are left in place. 785 QualType getDesugaredType(const ASTContext &Context) const { 786 return getDesugaredType(*this, Context); 787 } 788 789 SplitQualType getSplitDesugaredType() const { 790 return getSplitDesugaredType(*this); 791 } 792 793 /// \brief Return the specified type with one level of "sugar" removed from 794 /// the type. 795 /// 796 /// This routine takes off the first typedef, typeof, etc. If the outer level 797 /// of the type is already concrete, it returns it unmodified. 798 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 799 return getSingleStepDesugaredTypeImpl(*this, Context); 800 } 801 802 /// IgnoreParens - Returns the specified type after dropping any 803 /// outer-level parentheses. 804 QualType IgnoreParens() const { 805 if (isa<ParenType>(*this)) 806 return QualType::IgnoreParens(*this); 807 return *this; 808 } 809 810 /// operator==/!= - Indicate whether the specified types and qualifiers are 811 /// identical. 812 friend bool operator==(const QualType &LHS, const QualType &RHS) { 813 return LHS.Value == RHS.Value; 814 } 815 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 816 return LHS.Value != RHS.Value; 817 } 818 std::string getAsString() const { 819 return getAsString(split()); 820 } 821 static std::string getAsString(SplitQualType split) { 822 return getAsString(split.Ty, split.Quals); 823 } 824 static std::string getAsString(const Type *ty, Qualifiers qs); 825 826 std::string getAsString(const PrintingPolicy &Policy) const { 827 std::string S; 828 getAsStringInternal(S, Policy); 829 return S; 830 } 831 void getAsStringInternal(std::string &Str, 832 const PrintingPolicy &Policy) const { 833 return getAsStringInternal(split(), Str, Policy); 834 } 835 static void getAsStringInternal(SplitQualType split, std::string &out, 836 const PrintingPolicy &policy) { 837 return getAsStringInternal(split.Ty, split.Quals, out, policy); 838 } 839 static void getAsStringInternal(const Type *ty, Qualifiers qs, 840 std::string &out, 841 const PrintingPolicy &policy); 842 843 void dump(const char *s) const; 844 void dump() const; 845 846 void Profile(llvm::FoldingSetNodeID &ID) const { 847 ID.AddPointer(getAsOpaquePtr()); 848 } 849 850 /// getAddressSpace - Return the address space of this type. 851 inline unsigned getAddressSpace() const; 852 853 /// getObjCGCAttr - Returns gc attribute of this type. 854 inline Qualifiers::GC getObjCGCAttr() const; 855 856 /// isObjCGCWeak true when Type is objc's weak. 857 bool isObjCGCWeak() const { 858 return getObjCGCAttr() == Qualifiers::Weak; 859 } 860 861 /// isObjCGCStrong true when Type is objc's strong. 862 bool isObjCGCStrong() const { 863 return getObjCGCAttr() == Qualifiers::Strong; 864 } 865 866 /// getObjCLifetime - Returns lifetime attribute of this type. 867 Qualifiers::ObjCLifetime getObjCLifetime() const { 868 return getQualifiers().getObjCLifetime(); 869 } 870 871 bool hasNonTrivialObjCLifetime() const { 872 return getQualifiers().hasNonTrivialObjCLifetime(); 873 } 874 875 bool hasStrongOrWeakObjCLifetime() const { 876 return getQualifiers().hasStrongOrWeakObjCLifetime(); 877 } 878 879 enum DestructionKind { 880 DK_none, 881 DK_cxx_destructor, 882 DK_objc_strong_lifetime, 883 DK_objc_weak_lifetime 884 }; 885 886 /// isDestructedType - nonzero if objects of this type require 887 /// non-trivial work to clean up after. Non-zero because it's 888 /// conceivable that qualifiers (objc_gc(weak)?) could make 889 /// something require destruction. 890 DestructionKind isDestructedType() const { 891 return isDestructedTypeImpl(*this); 892 } 893 894 /// \brief Determine whether expressions of the given type are forbidden 895 /// from being lvalues in C. 896 /// 897 /// The expression types that are forbidden to be lvalues are: 898 /// - 'void', but not qualified void 899 /// - function types 900 /// 901 /// The exact rule here is C99 6.3.2.1: 902 /// An lvalue is an expression with an object type or an incomplete 903 /// type other than void. 904 bool isCForbiddenLValueType() const; 905 906 /// \brief Determine whether this type has trivial copy/move-assignment 907 /// semantics. 908 bool hasTrivialAssignment(ASTContext &Context, bool Copying) const; 909 910private: 911 // These methods are implemented in a separate translation unit; 912 // "static"-ize them to avoid creating temporary QualTypes in the 913 // caller. 914 static bool isConstant(QualType T, ASTContext& Ctx); 915 static QualType getDesugaredType(QualType T, const ASTContext &Context); 916 static SplitQualType getSplitDesugaredType(QualType T); 917 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 918 static QualType getSingleStepDesugaredTypeImpl(QualType type, 919 const ASTContext &C); 920 static QualType IgnoreParens(QualType T); 921 static DestructionKind isDestructedTypeImpl(QualType type); 922}; 923 924} // end clang. 925 926namespace llvm { 927/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 928/// to a specific Type class. 929template<> struct simplify_type<const ::clang::QualType> { 930 typedef const ::clang::Type *SimpleType; 931 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 932 return Val.getTypePtr(); 933 } 934}; 935template<> struct simplify_type< ::clang::QualType> 936 : public simplify_type<const ::clang::QualType> {}; 937 938// Teach SmallPtrSet that QualType is "basically a pointer". 939template<> 940class PointerLikeTypeTraits<clang::QualType> { 941public: 942 static inline void *getAsVoidPointer(clang::QualType P) { 943 return P.getAsOpaquePtr(); 944 } 945 static inline clang::QualType getFromVoidPointer(void *P) { 946 return clang::QualType::getFromOpaquePtr(P); 947 } 948 // Various qualifiers go in low bits. 949 enum { NumLowBitsAvailable = 0 }; 950}; 951 952} // end namespace llvm 953 954namespace clang { 955 956/// \brief Base class that is common to both the \c ExtQuals and \c Type 957/// classes, which allows \c QualType to access the common fields between the 958/// two. 959/// 960class ExtQualsTypeCommonBase { 961 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 962 : BaseType(baseType), CanonicalType(canon) {} 963 964 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 965 /// a self-referential pointer (for \c Type). 966 /// 967 /// This pointer allows an efficient mapping from a QualType to its 968 /// underlying type pointer. 969 const Type *const BaseType; 970 971 /// \brief The canonical type of this type. A QualType. 972 QualType CanonicalType; 973 974 friend class QualType; 975 friend class Type; 976 friend class ExtQuals; 977}; 978 979/// ExtQuals - We can encode up to four bits in the low bits of a 980/// type pointer, but there are many more type qualifiers that we want 981/// to be able to apply to an arbitrary type. Therefore we have this 982/// struct, intended to be heap-allocated and used by QualType to 983/// store qualifiers. 984/// 985/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 986/// in three low bits on the QualType pointer; a fourth bit records whether 987/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 988/// Objective-C GC attributes) are much more rare. 989class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 990 // NOTE: changing the fast qualifiers should be straightforward as 991 // long as you don't make 'const' non-fast. 992 // 1. Qualifiers: 993 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 994 // Fast qualifiers must occupy the low-order bits. 995 // b) Update Qualifiers::FastWidth and FastMask. 996 // 2. QualType: 997 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 998 // b) Update remove{Volatile,Restrict}, defined near the end of 999 // this header. 1000 // 3. ASTContext: 1001 // a) Update get{Volatile,Restrict}Type. 1002 1003 /// Quals - the immutable set of qualifiers applied by this 1004 /// node; always contains extended qualifiers. 1005 Qualifiers Quals; 1006 1007 ExtQuals *this_() { return this; } 1008 1009public: 1010 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1011 : ExtQualsTypeCommonBase(baseType, 1012 canon.isNull() ? QualType(this_(), 0) : canon), 1013 Quals(quals) 1014 { 1015 assert(Quals.hasNonFastQualifiers() 1016 && "ExtQuals created with no fast qualifiers"); 1017 assert(!Quals.hasFastQualifiers() 1018 && "ExtQuals created with fast qualifiers"); 1019 } 1020 1021 Qualifiers getQualifiers() const { return Quals; } 1022 1023 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1024 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1025 1026 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1027 Qualifiers::ObjCLifetime getObjCLifetime() const { 1028 return Quals.getObjCLifetime(); 1029 } 1030 1031 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1032 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1033 1034 const Type *getBaseType() const { return BaseType; } 1035 1036public: 1037 void Profile(llvm::FoldingSetNodeID &ID) const { 1038 Profile(ID, getBaseType(), Quals); 1039 } 1040 static void Profile(llvm::FoldingSetNodeID &ID, 1041 const Type *BaseType, 1042 Qualifiers Quals) { 1043 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1044 ID.AddPointer(BaseType); 1045 Quals.Profile(ID); 1046 } 1047}; 1048 1049/// \brief The kind of C++0x ref-qualifier associated with a function type, 1050/// which determines whether a member function's "this" object can be an 1051/// lvalue, rvalue, or neither. 1052enum RefQualifierKind { 1053 /// \brief No ref-qualifier was provided. 1054 RQ_None = 0, 1055 /// \brief An lvalue ref-qualifier was provided (\c &). 1056 RQ_LValue, 1057 /// \brief An rvalue ref-qualifier was provided (\c &&). 1058 RQ_RValue 1059}; 1060 1061/// Type - This is the base class of the type hierarchy. A central concept 1062/// with types is that each type always has a canonical type. A canonical type 1063/// is the type with any typedef names stripped out of it or the types it 1064/// references. For example, consider: 1065/// 1066/// typedef int foo; 1067/// typedef foo* bar; 1068/// 'int *' 'foo *' 'bar' 1069/// 1070/// There will be a Type object created for 'int'. Since int is canonical, its 1071/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1072/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1073/// there is a PointerType that represents 'int*', which, like 'int', is 1074/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1075/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1076/// is also 'int*'. 1077/// 1078/// Non-canonical types are useful for emitting diagnostics, without losing 1079/// information about typedefs being used. Canonical types are useful for type 1080/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1081/// about whether something has a particular form (e.g. is a function type), 1082/// because they implicitly, recursively, strip all typedefs out of a type. 1083/// 1084/// Types, once created, are immutable. 1085/// 1086class Type : public ExtQualsTypeCommonBase { 1087public: 1088 enum TypeClass { 1089#define TYPE(Class, Base) Class, 1090#define LAST_TYPE(Class) TypeLast = Class, 1091#define ABSTRACT_TYPE(Class, Base) 1092#include "clang/AST/TypeNodes.def" 1093 TagFirst = Record, TagLast = Enum 1094 }; 1095 1096private: 1097 Type(const Type&); // DO NOT IMPLEMENT. 1098 void operator=(const Type&); // DO NOT IMPLEMENT. 1099 1100 /// Bitfields required by the Type class. 1101 class TypeBitfields { 1102 friend class Type; 1103 template <class T> friend class TypePropertyCache; 1104 1105 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1106 unsigned TC : 8; 1107 1108 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1109 /// Note that this should stay at the end of the ivars for Type so that 1110 /// subclasses can pack their bitfields into the same word. 1111 unsigned Dependent : 1; 1112 1113 /// \brief Whether this type somehow involves a template parameter, even 1114 /// if the resolution of the type does not depend on a template parameter. 1115 unsigned InstantiationDependent : 1; 1116 1117 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1118 unsigned VariablyModified : 1; 1119 1120 /// \brief Whether this type contains an unexpanded parameter pack 1121 /// (for C++0x variadic templates). 1122 unsigned ContainsUnexpandedParameterPack : 1; 1123 1124 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1125 /// with 'Cache') is valid. If so, then this is a 1126 /// LangOptions::VisibilityMode+1. 1127 mutable unsigned CacheValidAndVisibility : 2; 1128 1129 /// \brief True if the visibility was set explicitly in the source code. 1130 mutable unsigned CachedExplicitVisibility : 1; 1131 1132 /// \brief Linkage of this type. 1133 mutable unsigned CachedLinkage : 2; 1134 1135 /// \brief Whether this type involves and local or unnamed types. 1136 mutable unsigned CachedLocalOrUnnamed : 1; 1137 1138 /// \brief FromAST - Whether this type comes from an AST file. 1139 mutable unsigned FromAST : 1; 1140 1141 bool isCacheValid() const { 1142 return (CacheValidAndVisibility != 0); 1143 } 1144 Visibility getVisibility() const { 1145 assert(isCacheValid() && "getting linkage from invalid cache"); 1146 return static_cast<Visibility>(CacheValidAndVisibility-1); 1147 } 1148 bool isVisibilityExplicit() const { 1149 assert(isCacheValid() && "getting linkage from invalid cache"); 1150 return CachedExplicitVisibility; 1151 } 1152 Linkage getLinkage() const { 1153 assert(isCacheValid() && "getting linkage from invalid cache"); 1154 return static_cast<Linkage>(CachedLinkage); 1155 } 1156 bool hasLocalOrUnnamedType() const { 1157 assert(isCacheValid() && "getting linkage from invalid cache"); 1158 return CachedLocalOrUnnamed; 1159 } 1160 }; 1161 enum { NumTypeBits = 19 }; 1162 1163protected: 1164 // These classes allow subclasses to somewhat cleanly pack bitfields 1165 // into Type. 1166 1167 class ArrayTypeBitfields { 1168 friend class ArrayType; 1169 1170 unsigned : NumTypeBits; 1171 1172 /// IndexTypeQuals - CVR qualifiers from declarations like 1173 /// 'int X[static restrict 4]'. For function parameters only. 1174 unsigned IndexTypeQuals : 3; 1175 1176 /// SizeModifier - storage class qualifiers from declarations like 1177 /// 'int X[static restrict 4]'. For function parameters only. 1178 /// Actually an ArrayType::ArraySizeModifier. 1179 unsigned SizeModifier : 3; 1180 }; 1181 1182 class BuiltinTypeBitfields { 1183 friend class BuiltinType; 1184 1185 unsigned : NumTypeBits; 1186 1187 /// The kind (BuiltinType::Kind) of builtin type this is. 1188 unsigned Kind : 8; 1189 }; 1190 1191 class FunctionTypeBitfields { 1192 friend class FunctionType; 1193 1194 unsigned : NumTypeBits; 1195 1196 /// Extra information which affects how the function is called, like 1197 /// regparm and the calling convention. 1198 unsigned ExtInfo : 8; 1199 1200 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1201 /// other bitfields. 1202 /// The qualifiers are part of FunctionProtoType because... 1203 /// 1204 /// C++ 8.3.5p4: The return type, the parameter type list and the 1205 /// cv-qualifier-seq, [...], are part of the function type. 1206 unsigned TypeQuals : 3; 1207 1208 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1209 /// 1210 /// This is a value of type \c RefQualifierKind. 1211 unsigned RefQualifier : 2; 1212 }; 1213 1214 class ObjCObjectTypeBitfields { 1215 friend class ObjCObjectType; 1216 1217 unsigned : NumTypeBits; 1218 1219 /// NumProtocols - The number of protocols stored directly on this 1220 /// object type. 1221 unsigned NumProtocols : 32 - NumTypeBits; 1222 }; 1223 1224 class ReferenceTypeBitfields { 1225 friend class ReferenceType; 1226 1227 unsigned : NumTypeBits; 1228 1229 /// True if the type was originally spelled with an lvalue sigil. 1230 /// This is never true of rvalue references but can also be false 1231 /// on lvalue references because of C++0x [dcl.typedef]p9, 1232 /// as follows: 1233 /// 1234 /// typedef int &ref; // lvalue, spelled lvalue 1235 /// typedef int &&rvref; // rvalue 1236 /// ref &a; // lvalue, inner ref, spelled lvalue 1237 /// ref &&a; // lvalue, inner ref 1238 /// rvref &a; // lvalue, inner ref, spelled lvalue 1239 /// rvref &&a; // rvalue, inner ref 1240 unsigned SpelledAsLValue : 1; 1241 1242 /// True if the inner type is a reference type. This only happens 1243 /// in non-canonical forms. 1244 unsigned InnerRef : 1; 1245 }; 1246 1247 class TypeWithKeywordBitfields { 1248 friend class TypeWithKeyword; 1249 1250 unsigned : NumTypeBits; 1251 1252 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1253 unsigned Keyword : 8; 1254 }; 1255 1256 class VectorTypeBitfields { 1257 friend class VectorType; 1258 1259 unsigned : NumTypeBits; 1260 1261 /// VecKind - The kind of vector, either a generic vector type or some 1262 /// target-specific vector type such as for AltiVec or Neon. 1263 unsigned VecKind : 3; 1264 1265 /// NumElements - The number of elements in the vector. 1266 unsigned NumElements : 29 - NumTypeBits; 1267 }; 1268 1269 class AttributedTypeBitfields { 1270 friend class AttributedType; 1271 1272 unsigned : NumTypeBits; 1273 1274 /// AttrKind - an AttributedType::Kind 1275 unsigned AttrKind : 32 - NumTypeBits; 1276 }; 1277 1278 union { 1279 TypeBitfields TypeBits; 1280 ArrayTypeBitfields ArrayTypeBits; 1281 AttributedTypeBitfields AttributedTypeBits; 1282 BuiltinTypeBitfields BuiltinTypeBits; 1283 FunctionTypeBitfields FunctionTypeBits; 1284 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1285 ReferenceTypeBitfields ReferenceTypeBits; 1286 TypeWithKeywordBitfields TypeWithKeywordBits; 1287 VectorTypeBitfields VectorTypeBits; 1288 }; 1289 1290private: 1291 /// \brief Set whether this type comes from an AST file. 1292 void setFromAST(bool V = true) const { 1293 TypeBits.FromAST = V; 1294 } 1295 1296 template <class T> friend class TypePropertyCache; 1297 1298protected: 1299 // silence VC++ warning C4355: 'this' : used in base member initializer list 1300 Type *this_() { return this; } 1301 Type(TypeClass tc, QualType canon, bool Dependent, 1302 bool InstantiationDependent, bool VariablyModified, 1303 bool ContainsUnexpandedParameterPack) 1304 : ExtQualsTypeCommonBase(this, 1305 canon.isNull() ? QualType(this_(), 0) : canon) { 1306 TypeBits.TC = tc; 1307 TypeBits.Dependent = Dependent; 1308 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1309 TypeBits.VariablyModified = VariablyModified; 1310 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1311 TypeBits.CacheValidAndVisibility = 0; 1312 TypeBits.CachedExplicitVisibility = false; 1313 TypeBits.CachedLocalOrUnnamed = false; 1314 TypeBits.CachedLinkage = NoLinkage; 1315 TypeBits.FromAST = false; 1316 } 1317 friend class ASTContext; 1318 1319 void setDependent(bool D = true) { 1320 TypeBits.Dependent = D; 1321 if (D) 1322 TypeBits.InstantiationDependent = true; 1323 } 1324 void setInstantiationDependent(bool D = true) { 1325 TypeBits.InstantiationDependent = D; } 1326 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1327 } 1328 void setContainsUnexpandedParameterPack(bool PP = true) { 1329 TypeBits.ContainsUnexpandedParameterPack = PP; 1330 } 1331 1332public: 1333 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1334 1335 /// \brief Whether this type comes from an AST file. 1336 bool isFromAST() const { return TypeBits.FromAST; } 1337 1338 /// \brief Whether this type is or contains an unexpanded parameter 1339 /// pack, used to support C++0x variadic templates. 1340 /// 1341 /// A type that contains a parameter pack shall be expanded by the 1342 /// ellipsis operator at some point. For example, the typedef in the 1343 /// following example contains an unexpanded parameter pack 'T': 1344 /// 1345 /// \code 1346 /// template<typename ...T> 1347 /// struct X { 1348 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1349 /// }; 1350 /// \endcode 1351 /// 1352 /// Note that this routine does not specify which 1353 bool containsUnexpandedParameterPack() const { 1354 return TypeBits.ContainsUnexpandedParameterPack; 1355 } 1356 1357 /// Determines if this type would be canonical if it had no further 1358 /// qualification. 1359 bool isCanonicalUnqualified() const { 1360 return CanonicalType == QualType(this, 0); 1361 } 1362 1363 /// Pull a single level of sugar off of this locally-unqualified type. 1364 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1365 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1366 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1367 1368 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1369 /// object types, function types, and incomplete types. 1370 1371 /// isIncompleteType - Return true if this is an incomplete type. 1372 /// A type that can describe objects, but which lacks information needed to 1373 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1374 /// routine will need to determine if the size is actually required. 1375 /// 1376 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1377 /// that can be completed (such as a C struct, C++ class, or Objective-C 1378 /// class), will be set to the declaration. 1379 bool isIncompleteType(NamedDecl **Def = 0) const; 1380 1381 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1382 /// type, in other words, not a function type. 1383 bool isIncompleteOrObjectType() const { 1384 return !isFunctionType(); 1385 } 1386 1387 /// \brief Determine whether this type is an object type. 1388 bool isObjectType() const { 1389 // C++ [basic.types]p8: 1390 // An object type is a (possibly cv-qualified) type that is not a 1391 // function type, not a reference type, and not a void type. 1392 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1393 } 1394 1395 /// isLiteralType - Return true if this is a literal type 1396 /// (C++0x [basic.types]p10) 1397 bool isLiteralType() const; 1398 1399 /// \brief Test if this type is a standard-layout type. 1400 /// (C++0x [basic.type]p9) 1401 bool isStandardLayoutType() const; 1402 1403 /// Helper methods to distinguish type categories. All type predicates 1404 /// operate on the canonical type, ignoring typedefs and qualifiers. 1405 1406 /// isBuiltinType - returns true if the type is a builtin type. 1407 bool isBuiltinType() const; 1408 1409 /// isSpecificBuiltinType - Test for a particular builtin type. 1410 bool isSpecificBuiltinType(unsigned K) const; 1411 1412 /// isPlaceholderType - Test for a type which does not represent an 1413 /// actual type-system type but is instead used as a placeholder for 1414 /// various convenient purposes within Clang. All such types are 1415 /// BuiltinTypes. 1416 bool isPlaceholderType() const; 1417 const BuiltinType *getAsPlaceholderType() const; 1418 1419 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1420 bool isSpecificPlaceholderType(unsigned K) const; 1421 1422 /// isNonOverloadPlaceholderType - Test for a placeholder type 1423 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1424 bool isNonOverloadPlaceholderType() const; 1425 1426 /// isIntegerType() does *not* include complex integers (a GCC extension). 1427 /// isComplexIntegerType() can be used to test for complex integers. 1428 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1429 bool isEnumeralType() const; 1430 bool isBooleanType() const; 1431 bool isCharType() const; 1432 bool isWideCharType() const; 1433 bool isChar16Type() const; 1434 bool isChar32Type() const; 1435 bool isAnyCharacterType() const; 1436 bool isIntegralType(ASTContext &Ctx) const; 1437 1438 /// \brief Determine whether this type is an integral or enumeration type. 1439 bool isIntegralOrEnumerationType() const; 1440 /// \brief Determine whether this type is an integral or unscoped enumeration 1441 /// type. 1442 bool isIntegralOrUnscopedEnumerationType() const; 1443 1444 /// Floating point categories. 1445 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1446 /// isComplexType() does *not* include complex integers (a GCC extension). 1447 /// isComplexIntegerType() can be used to test for complex integers. 1448 bool isComplexType() const; // C99 6.2.5p11 (complex) 1449 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1450 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1451 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1452 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1453 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1454 bool isVoidType() const; // C99 6.2.5p19 1455 bool isDerivedType() const; // C99 6.2.5p20 1456 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1457 bool isAggregateType() const; 1458 bool isFundamentalType() const; 1459 bool isCompoundType() const; 1460 1461 // Type Predicates: Check to see if this type is structurally the specified 1462 // type, ignoring typedefs and qualifiers. 1463 bool isFunctionType() const; 1464 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1465 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1466 bool isPointerType() const; 1467 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1468 bool isBlockPointerType() const; 1469 bool isVoidPointerType() const; 1470 bool isReferenceType() const; 1471 bool isLValueReferenceType() const; 1472 bool isRValueReferenceType() const; 1473 bool isFunctionPointerType() const; 1474 bool isMemberPointerType() const; 1475 bool isMemberFunctionPointerType() const; 1476 bool isMemberDataPointerType() const; 1477 bool isArrayType() const; 1478 bool isConstantArrayType() const; 1479 bool isIncompleteArrayType() const; 1480 bool isVariableArrayType() const; 1481 bool isDependentSizedArrayType() const; 1482 bool isRecordType() const; 1483 bool isClassType() const; 1484 bool isStructureType() const; 1485 bool isStructureOrClassType() const; 1486 bool isUnionType() const; 1487 bool isComplexIntegerType() const; // GCC _Complex integer type. 1488 bool isVectorType() const; // GCC vector type. 1489 bool isExtVectorType() const; // Extended vector type. 1490 bool isObjCObjectPointerType() const; // pointer to ObjC object 1491 bool isObjCRetainableType() const; // ObjC object or block pointer 1492 bool isObjCLifetimeType() const; // (array of)* retainable type 1493 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1494 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1495 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1496 // for the common case. 1497 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1498 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1499 bool isObjCQualifiedIdType() const; // id<foo> 1500 bool isObjCQualifiedClassType() const; // Class<foo> 1501 bool isObjCObjectOrInterfaceType() const; 1502 bool isObjCIdType() const; // id 1503 bool isObjCClassType() const; // Class 1504 bool isObjCSelType() const; // Class 1505 bool isObjCBuiltinType() const; // 'id' or 'Class' 1506 bool isObjCARCBridgableType() const; 1507 bool isCARCBridgableType() const; 1508 bool isTemplateTypeParmType() const; // C++ template type parameter 1509 bool isNullPtrType() const; // C++0x nullptr_t 1510 bool isAtomicType() const; // C11 _Atomic() 1511 1512 /// Determines if this type, which must satisfy 1513 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1514 /// than implicitly __strong. 1515 bool isObjCARCImplicitlyUnretainedType() const; 1516 1517 /// Return the implicit lifetime for this type, which must not be dependent. 1518 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1519 1520 enum ScalarTypeKind { 1521 STK_CPointer, 1522 STK_BlockPointer, 1523 STK_ObjCObjectPointer, 1524 STK_MemberPointer, 1525 STK_Bool, 1526 STK_Integral, 1527 STK_Floating, 1528 STK_IntegralComplex, 1529 STK_FloatingComplex 1530 }; 1531 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1532 ScalarTypeKind getScalarTypeKind() const; 1533 1534 /// isDependentType - Whether this type is a dependent type, meaning 1535 /// that its definition somehow depends on a template parameter 1536 /// (C++ [temp.dep.type]). 1537 bool isDependentType() const { return TypeBits.Dependent; } 1538 1539 /// \brief Determine whether this type is an instantiation-dependent type, 1540 /// meaning that the type involves a template parameter (even if the 1541 /// definition does not actually depend on the type substituted for that 1542 /// template parameter). 1543 bool isInstantiationDependentType() const { 1544 return TypeBits.InstantiationDependent; 1545 } 1546 1547 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1548 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1549 1550 /// \brief Whether this type involves a variable-length array type 1551 /// with a definite size. 1552 bool hasSizedVLAType() const; 1553 1554 /// \brief Whether this type is or contains a local or unnamed type. 1555 bool hasUnnamedOrLocalType() const; 1556 1557 bool isOverloadableType() const; 1558 1559 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1560 bool isElaboratedTypeSpecifier() const; 1561 1562 bool canDecayToPointerType() const; 1563 1564 /// hasPointerRepresentation - Whether this type is represented 1565 /// natively as a pointer; this includes pointers, references, block 1566 /// pointers, and Objective-C interface, qualified id, and qualified 1567 /// interface types, as well as nullptr_t. 1568 bool hasPointerRepresentation() const; 1569 1570 /// hasObjCPointerRepresentation - Whether this type can represent 1571 /// an objective pointer type for the purpose of GC'ability 1572 bool hasObjCPointerRepresentation() const; 1573 1574 /// \brief Determine whether this type has an integer representation 1575 /// of some sort, e.g., it is an integer type or a vector. 1576 bool hasIntegerRepresentation() const; 1577 1578 /// \brief Determine whether this type has an signed integer representation 1579 /// of some sort, e.g., it is an signed integer type or a vector. 1580 bool hasSignedIntegerRepresentation() const; 1581 1582 /// \brief Determine whether this type has an unsigned integer representation 1583 /// of some sort, e.g., it is an unsigned integer type or a vector. 1584 bool hasUnsignedIntegerRepresentation() const; 1585 1586 /// \brief Determine whether this type has a floating-point representation 1587 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1588 bool hasFloatingRepresentation() const; 1589 1590 // Type Checking Functions: Check to see if this type is structurally the 1591 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1592 // the best type we can. 1593 const RecordType *getAsStructureType() const; 1594 /// NOTE: getAs*ArrayType are methods on ASTContext. 1595 const RecordType *getAsUnionType() const; 1596 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1597 // The following is a convenience method that returns an ObjCObjectPointerType 1598 // for object declared using an interface. 1599 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1600 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1601 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1602 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1603 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1604 1605 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1606 /// because the type is a RecordType or because it is the injected-class-name 1607 /// type of a class template or class template partial specialization. 1608 CXXRecordDecl *getAsCXXRecordDecl() const; 1609 1610 /// \brief Get the AutoType whose type will be deduced for a variable with 1611 /// an initializer of this type. This looks through declarators like pointer 1612 /// types, but not through decltype or typedefs. 1613 AutoType *getContainedAutoType() const; 1614 1615 /// Member-template getAs<specific type>'. Look through sugar for 1616 /// an instance of <specific type>. This scheme will eventually 1617 /// replace the specific getAsXXXX methods above. 1618 /// 1619 /// There are some specializations of this member template listed 1620 /// immediately following this class. 1621 template <typename T> const T *getAs() const; 1622 1623 /// A variant of getAs<> for array types which silently discards 1624 /// qualifiers from the outermost type. 1625 const ArrayType *getAsArrayTypeUnsafe() const; 1626 1627 /// Member-template castAs<specific type>. Look through sugar for 1628 /// the underlying instance of <specific type>. 1629 /// 1630 /// This method has the same relationship to getAs<T> as cast<T> has 1631 /// to dyn_cast<T>; which is to say, the underlying type *must* 1632 /// have the intended type, and this method will never return null. 1633 template <typename T> const T *castAs() const; 1634 1635 /// A variant of castAs<> for array type which silently discards 1636 /// qualifiers from the outermost type. 1637 const ArrayType *castAsArrayTypeUnsafe() const; 1638 1639 /// getBaseElementTypeUnsafe - Get the base element type of this 1640 /// type, potentially discarding type qualifiers. This method 1641 /// should never be used when type qualifiers are meaningful. 1642 const Type *getBaseElementTypeUnsafe() const; 1643 1644 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1645 /// element type of the array, potentially with type qualifiers missing. 1646 /// This method should never be used when type qualifiers are meaningful. 1647 const Type *getArrayElementTypeNoTypeQual() const; 1648 1649 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1650 /// pointer, this returns the respective pointee. 1651 QualType getPointeeType() const; 1652 1653 /// getUnqualifiedDesugaredType() - Return the specified type with 1654 /// any "sugar" removed from the type, removing any typedefs, 1655 /// typeofs, etc., as well as any qualifiers. 1656 const Type *getUnqualifiedDesugaredType() const; 1657 1658 /// More type predicates useful for type checking/promotion 1659 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1660 1661 /// isSignedIntegerType - Return true if this is an integer type that is 1662 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1663 /// or an enum decl which has a signed representation. 1664 bool isSignedIntegerType() const; 1665 1666 /// isUnsignedIntegerType - Return true if this is an integer type that is 1667 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1668 /// or an enum decl which has an unsigned representation. 1669 bool isUnsignedIntegerType() const; 1670 1671 /// Determines whether this is an integer type that is signed or an 1672 /// enumeration types whose underlying type is a signed integer type. 1673 bool isSignedIntegerOrEnumerationType() const; 1674 1675 /// Determines whether this is an integer type that is unsigned or an 1676 /// enumeration types whose underlying type is a unsigned integer type. 1677 bool isUnsignedIntegerOrEnumerationType() const; 1678 1679 /// isConstantSizeType - Return true if this is not a variable sized type, 1680 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1681 /// incomplete types. 1682 bool isConstantSizeType() const; 1683 1684 /// isSpecifierType - Returns true if this type can be represented by some 1685 /// set of type specifiers. 1686 bool isSpecifierType() const; 1687 1688 /// \brief Determine the linkage of this type. 1689 Linkage getLinkage() const; 1690 1691 /// \brief Determine the visibility of this type. 1692 Visibility getVisibility() const; 1693 1694 /// \brief Return true if the visibility was explicitly set is the code. 1695 bool isVisibilityExplicit() const; 1696 1697 /// \brief Determine the linkage and visibility of this type. 1698 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1699 1700 /// \brief Note that the linkage is no longer known. 1701 void ClearLinkageCache(); 1702 1703 const char *getTypeClassName() const; 1704 1705 QualType getCanonicalTypeInternal() const { 1706 return CanonicalType; 1707 } 1708 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1709 LLVM_ATTRIBUTE_USED void dump() const; 1710 1711 static bool classof(const Type *) { return true; } 1712 1713 friend class ASTReader; 1714 friend class ASTWriter; 1715}; 1716 1717template <> inline const TypedefType *Type::getAs() const { 1718 return dyn_cast<TypedefType>(this); 1719} 1720 1721// We can do canonical leaf types faster, because we don't have to 1722// worry about preserving child type decoration. 1723#define TYPE(Class, Base) 1724#define LEAF_TYPE(Class) \ 1725template <> inline const Class##Type *Type::getAs() const { \ 1726 return dyn_cast<Class##Type>(CanonicalType); \ 1727} \ 1728template <> inline const Class##Type *Type::castAs() const { \ 1729 return cast<Class##Type>(CanonicalType); \ 1730} 1731#include "clang/AST/TypeNodes.def" 1732 1733 1734/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1735/// types are always canonical and have a literal name field. 1736class BuiltinType : public Type { 1737public: 1738 enum Kind { 1739#define BUILTIN_TYPE(Id, SingletonId) Id, 1740#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1741#include "clang/AST/BuiltinTypes.def" 1742 }; 1743 1744public: 1745 BuiltinType(Kind K) 1746 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1747 /*InstantiationDependent=*/(K == Dependent), 1748 /*VariablyModified=*/false, 1749 /*Unexpanded paramter pack=*/false) { 1750 BuiltinTypeBits.Kind = K; 1751 } 1752 1753 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1754 const char *getName(const PrintingPolicy &Policy) const; 1755 1756 bool isSugared() const { return false; } 1757 QualType desugar() const { return QualType(this, 0); } 1758 1759 bool isInteger() const { 1760 return getKind() >= Bool && getKind() <= Int128; 1761 } 1762 1763 bool isSignedInteger() const { 1764 return getKind() >= Char_S && getKind() <= Int128; 1765 } 1766 1767 bool isUnsignedInteger() const { 1768 return getKind() >= Bool && getKind() <= UInt128; 1769 } 1770 1771 bool isFloatingPoint() const { 1772 return getKind() >= Half && getKind() <= LongDouble; 1773 } 1774 1775 /// Determines whether the given kind corresponds to a placeholder type. 1776 static bool isPlaceholderTypeKind(Kind K) { 1777 return K >= Overload; 1778 } 1779 1780 /// Determines whether this type is a placeholder type, i.e. a type 1781 /// which cannot appear in arbitrary positions in a fully-formed 1782 /// expression. 1783 bool isPlaceholderType() const { 1784 return isPlaceholderTypeKind(getKind()); 1785 } 1786 1787 /// Determines whether this type is a placeholder type other than 1788 /// Overload. Most placeholder types require only syntactic 1789 /// information about their context in order to be resolved (e.g. 1790 /// whether it is a call expression), which means they can (and 1791 /// should) be resolved in an earlier "phase" of analysis. 1792 /// Overload expressions sometimes pick up further information 1793 /// from their context, like whether the context expects a 1794 /// specific function-pointer type, and so frequently need 1795 /// special treatment. 1796 bool isNonOverloadPlaceholderType() const { 1797 return getKind() > Overload; 1798 } 1799 1800 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1801 static bool classof(const BuiltinType *) { return true; } 1802}; 1803 1804/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1805/// types (_Complex float etc) as well as the GCC integer complex extensions. 1806/// 1807class ComplexType : public Type, public llvm::FoldingSetNode { 1808 QualType ElementType; 1809 ComplexType(QualType Element, QualType CanonicalPtr) : 1810 Type(Complex, CanonicalPtr, Element->isDependentType(), 1811 Element->isInstantiationDependentType(), 1812 Element->isVariablyModifiedType(), 1813 Element->containsUnexpandedParameterPack()), 1814 ElementType(Element) { 1815 } 1816 friend class ASTContext; // ASTContext creates these. 1817 1818public: 1819 QualType getElementType() const { return ElementType; } 1820 1821 bool isSugared() const { return false; } 1822 QualType desugar() const { return QualType(this, 0); } 1823 1824 void Profile(llvm::FoldingSetNodeID &ID) { 1825 Profile(ID, getElementType()); 1826 } 1827 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1828 ID.AddPointer(Element.getAsOpaquePtr()); 1829 } 1830 1831 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1832 static bool classof(const ComplexType *) { return true; } 1833}; 1834 1835/// ParenType - Sugar for parentheses used when specifying types. 1836/// 1837class ParenType : public Type, public llvm::FoldingSetNode { 1838 QualType Inner; 1839 1840 ParenType(QualType InnerType, QualType CanonType) : 1841 Type(Paren, CanonType, InnerType->isDependentType(), 1842 InnerType->isInstantiationDependentType(), 1843 InnerType->isVariablyModifiedType(), 1844 InnerType->containsUnexpandedParameterPack()), 1845 Inner(InnerType) { 1846 } 1847 friend class ASTContext; // ASTContext creates these. 1848 1849public: 1850 1851 QualType getInnerType() const { return Inner; } 1852 1853 bool isSugared() const { return true; } 1854 QualType desugar() const { return getInnerType(); } 1855 1856 void Profile(llvm::FoldingSetNodeID &ID) { 1857 Profile(ID, getInnerType()); 1858 } 1859 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1860 Inner.Profile(ID); 1861 } 1862 1863 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1864 static bool classof(const ParenType *) { return true; } 1865}; 1866 1867/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1868/// 1869class PointerType : public Type, public llvm::FoldingSetNode { 1870 QualType PointeeType; 1871 1872 PointerType(QualType Pointee, QualType CanonicalPtr) : 1873 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1874 Pointee->isInstantiationDependentType(), 1875 Pointee->isVariablyModifiedType(), 1876 Pointee->containsUnexpandedParameterPack()), 1877 PointeeType(Pointee) { 1878 } 1879 friend class ASTContext; // ASTContext creates these. 1880 1881public: 1882 1883 QualType getPointeeType() const { return PointeeType; } 1884 1885 bool isSugared() const { return false; } 1886 QualType desugar() const { return QualType(this, 0); } 1887 1888 void Profile(llvm::FoldingSetNodeID &ID) { 1889 Profile(ID, getPointeeType()); 1890 } 1891 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1892 ID.AddPointer(Pointee.getAsOpaquePtr()); 1893 } 1894 1895 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1896 static bool classof(const PointerType *) { return true; } 1897}; 1898 1899/// BlockPointerType - pointer to a block type. 1900/// This type is to represent types syntactically represented as 1901/// "void (^)(int)", etc. Pointee is required to always be a function type. 1902/// 1903class BlockPointerType : public Type, public llvm::FoldingSetNode { 1904 QualType PointeeType; // Block is some kind of pointer type 1905 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1906 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1907 Pointee->isInstantiationDependentType(), 1908 Pointee->isVariablyModifiedType(), 1909 Pointee->containsUnexpandedParameterPack()), 1910 PointeeType(Pointee) { 1911 } 1912 friend class ASTContext; // ASTContext creates these. 1913 1914public: 1915 1916 // Get the pointee type. Pointee is required to always be a function type. 1917 QualType getPointeeType() const { return PointeeType; } 1918 1919 bool isSugared() const { return false; } 1920 QualType desugar() const { return QualType(this, 0); } 1921 1922 void Profile(llvm::FoldingSetNodeID &ID) { 1923 Profile(ID, getPointeeType()); 1924 } 1925 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1926 ID.AddPointer(Pointee.getAsOpaquePtr()); 1927 } 1928 1929 static bool classof(const Type *T) { 1930 return T->getTypeClass() == BlockPointer; 1931 } 1932 static bool classof(const BlockPointerType *) { return true; } 1933}; 1934 1935/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1936/// 1937class ReferenceType : public Type, public llvm::FoldingSetNode { 1938 QualType PointeeType; 1939 1940protected: 1941 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1942 bool SpelledAsLValue) : 1943 Type(tc, CanonicalRef, Referencee->isDependentType(), 1944 Referencee->isInstantiationDependentType(), 1945 Referencee->isVariablyModifiedType(), 1946 Referencee->containsUnexpandedParameterPack()), 1947 PointeeType(Referencee) 1948 { 1949 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1950 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1951 } 1952 1953public: 1954 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1955 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1956 1957 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1958 QualType getPointeeType() const { 1959 // FIXME: this might strip inner qualifiers; okay? 1960 const ReferenceType *T = this; 1961 while (T->isInnerRef()) 1962 T = T->PointeeType->castAs<ReferenceType>(); 1963 return T->PointeeType; 1964 } 1965 1966 void Profile(llvm::FoldingSetNodeID &ID) { 1967 Profile(ID, PointeeType, isSpelledAsLValue()); 1968 } 1969 static void Profile(llvm::FoldingSetNodeID &ID, 1970 QualType Referencee, 1971 bool SpelledAsLValue) { 1972 ID.AddPointer(Referencee.getAsOpaquePtr()); 1973 ID.AddBoolean(SpelledAsLValue); 1974 } 1975 1976 static bool classof(const Type *T) { 1977 return T->getTypeClass() == LValueReference || 1978 T->getTypeClass() == RValueReference; 1979 } 1980 static bool classof(const ReferenceType *) { return true; } 1981}; 1982 1983/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1984/// 1985class LValueReferenceType : public ReferenceType { 1986 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1987 bool SpelledAsLValue) : 1988 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1989 {} 1990 friend class ASTContext; // ASTContext creates these 1991public: 1992 bool isSugared() const { return false; } 1993 QualType desugar() const { return QualType(this, 0); } 1994 1995 static bool classof(const Type *T) { 1996 return T->getTypeClass() == LValueReference; 1997 } 1998 static bool classof(const LValueReferenceType *) { return true; } 1999}; 2000 2001/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2002/// 2003class RValueReferenceType : public ReferenceType { 2004 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2005 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2006 } 2007 friend class ASTContext; // ASTContext creates these 2008public: 2009 bool isSugared() const { return false; } 2010 QualType desugar() const { return QualType(this, 0); } 2011 2012 static bool classof(const Type *T) { 2013 return T->getTypeClass() == RValueReference; 2014 } 2015 static bool classof(const RValueReferenceType *) { return true; } 2016}; 2017 2018/// MemberPointerType - C++ 8.3.3 - Pointers to members 2019/// 2020class MemberPointerType : public Type, public llvm::FoldingSetNode { 2021 QualType PointeeType; 2022 /// The class of which the pointee is a member. Must ultimately be a 2023 /// RecordType, but could be a typedef or a template parameter too. 2024 const Type *Class; 2025 2026 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2027 Type(MemberPointer, CanonicalPtr, 2028 Cls->isDependentType() || Pointee->isDependentType(), 2029 (Cls->isInstantiationDependentType() || 2030 Pointee->isInstantiationDependentType()), 2031 Pointee->isVariablyModifiedType(), 2032 (Cls->containsUnexpandedParameterPack() || 2033 Pointee->containsUnexpandedParameterPack())), 2034 PointeeType(Pointee), Class(Cls) { 2035 } 2036 friend class ASTContext; // ASTContext creates these. 2037 2038public: 2039 QualType getPointeeType() const { return PointeeType; } 2040 2041 /// Returns true if the member type (i.e. the pointee type) is a 2042 /// function type rather than a data-member type. 2043 bool isMemberFunctionPointer() const { 2044 return PointeeType->isFunctionProtoType(); 2045 } 2046 2047 /// Returns true if the member type (i.e. the pointee type) is a 2048 /// data type rather than a function type. 2049 bool isMemberDataPointer() const { 2050 return !PointeeType->isFunctionProtoType(); 2051 } 2052 2053 const Type *getClass() const { return Class; } 2054 2055 bool isSugared() const { return false; } 2056 QualType desugar() const { return QualType(this, 0); } 2057 2058 void Profile(llvm::FoldingSetNodeID &ID) { 2059 Profile(ID, getPointeeType(), getClass()); 2060 } 2061 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2062 const Type *Class) { 2063 ID.AddPointer(Pointee.getAsOpaquePtr()); 2064 ID.AddPointer(Class); 2065 } 2066 2067 static bool classof(const Type *T) { 2068 return T->getTypeClass() == MemberPointer; 2069 } 2070 static bool classof(const MemberPointerType *) { return true; } 2071}; 2072 2073/// ArrayType - C99 6.7.5.2 - Array Declarators. 2074/// 2075class ArrayType : public Type, public llvm::FoldingSetNode { 2076public: 2077 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2078 /// an array with a static size (e.g. int X[static 4]), or an array 2079 /// with a star size (e.g. int X[*]). 2080 /// 'static' is only allowed on function parameters. 2081 enum ArraySizeModifier { 2082 Normal, Static, Star 2083 }; 2084private: 2085 /// ElementType - The element type of the array. 2086 QualType ElementType; 2087 2088protected: 2089 // C++ [temp.dep.type]p1: 2090 // A type is dependent if it is... 2091 // - an array type constructed from any dependent type or whose 2092 // size is specified by a constant expression that is 2093 // value-dependent, 2094 ArrayType(TypeClass tc, QualType et, QualType can, 2095 ArraySizeModifier sm, unsigned tq, 2096 bool ContainsUnexpandedParameterPack) 2097 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2098 et->isInstantiationDependentType() || tc == DependentSizedArray, 2099 (tc == VariableArray || et->isVariablyModifiedType()), 2100 ContainsUnexpandedParameterPack), 2101 ElementType(et) { 2102 ArrayTypeBits.IndexTypeQuals = tq; 2103 ArrayTypeBits.SizeModifier = sm; 2104 } 2105 2106 friend class ASTContext; // ASTContext creates these. 2107 2108public: 2109 QualType getElementType() const { return ElementType; } 2110 ArraySizeModifier getSizeModifier() const { 2111 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2112 } 2113 Qualifiers getIndexTypeQualifiers() const { 2114 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2115 } 2116 unsigned getIndexTypeCVRQualifiers() const { 2117 return ArrayTypeBits.IndexTypeQuals; 2118 } 2119 2120 static bool classof(const Type *T) { 2121 return T->getTypeClass() == ConstantArray || 2122 T->getTypeClass() == VariableArray || 2123 T->getTypeClass() == IncompleteArray || 2124 T->getTypeClass() == DependentSizedArray; 2125 } 2126 static bool classof(const ArrayType *) { return true; } 2127}; 2128 2129/// ConstantArrayType - This class represents the canonical version of 2130/// C arrays with a specified constant size. For example, the canonical 2131/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2132/// type is 'int' and the size is 404. 2133class ConstantArrayType : public ArrayType { 2134 llvm::APInt Size; // Allows us to unique the type. 2135 2136 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2137 ArraySizeModifier sm, unsigned tq) 2138 : ArrayType(ConstantArray, et, can, sm, tq, 2139 et->containsUnexpandedParameterPack()), 2140 Size(size) {} 2141protected: 2142 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2143 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2144 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2145 Size(size) {} 2146 friend class ASTContext; // ASTContext creates these. 2147public: 2148 const llvm::APInt &getSize() const { return Size; } 2149 bool isSugared() const { return false; } 2150 QualType desugar() const { return QualType(this, 0); } 2151 2152 2153 /// \brief Determine the number of bits required to address a member of 2154 // an array with the given element type and number of elements. 2155 static unsigned getNumAddressingBits(ASTContext &Context, 2156 QualType ElementType, 2157 const llvm::APInt &NumElements); 2158 2159 /// \brief Determine the maximum number of active bits that an array's size 2160 /// can require, which limits the maximum size of the array. 2161 static unsigned getMaxSizeBits(ASTContext &Context); 2162 2163 void Profile(llvm::FoldingSetNodeID &ID) { 2164 Profile(ID, getElementType(), getSize(), 2165 getSizeModifier(), getIndexTypeCVRQualifiers()); 2166 } 2167 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2168 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2169 unsigned TypeQuals) { 2170 ID.AddPointer(ET.getAsOpaquePtr()); 2171 ID.AddInteger(ArraySize.getZExtValue()); 2172 ID.AddInteger(SizeMod); 2173 ID.AddInteger(TypeQuals); 2174 } 2175 static bool classof(const Type *T) { 2176 return T->getTypeClass() == ConstantArray; 2177 } 2178 static bool classof(const ConstantArrayType *) { return true; } 2179}; 2180 2181/// IncompleteArrayType - This class represents C arrays with an unspecified 2182/// size. For example 'int A[]' has an IncompleteArrayType where the element 2183/// type is 'int' and the size is unspecified. 2184class IncompleteArrayType : public ArrayType { 2185 2186 IncompleteArrayType(QualType et, QualType can, 2187 ArraySizeModifier sm, unsigned tq) 2188 : ArrayType(IncompleteArray, et, can, sm, tq, 2189 et->containsUnexpandedParameterPack()) {} 2190 friend class ASTContext; // ASTContext creates these. 2191public: 2192 bool isSugared() const { return false; } 2193 QualType desugar() const { return QualType(this, 0); } 2194 2195 static bool classof(const Type *T) { 2196 return T->getTypeClass() == IncompleteArray; 2197 } 2198 static bool classof(const IncompleteArrayType *) { return true; } 2199 2200 friend class StmtIteratorBase; 2201 2202 void Profile(llvm::FoldingSetNodeID &ID) { 2203 Profile(ID, getElementType(), getSizeModifier(), 2204 getIndexTypeCVRQualifiers()); 2205 } 2206 2207 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2208 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2209 ID.AddPointer(ET.getAsOpaquePtr()); 2210 ID.AddInteger(SizeMod); 2211 ID.AddInteger(TypeQuals); 2212 } 2213}; 2214 2215/// VariableArrayType - This class represents C arrays with a specified size 2216/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2217/// Since the size expression is an arbitrary expression, we store it as such. 2218/// 2219/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2220/// should not be: two lexically equivalent variable array types could mean 2221/// different things, for example, these variables do not have the same type 2222/// dynamically: 2223/// 2224/// void foo(int x) { 2225/// int Y[x]; 2226/// ++x; 2227/// int Z[x]; 2228/// } 2229/// 2230class VariableArrayType : public ArrayType { 2231 /// SizeExpr - An assignment expression. VLA's are only permitted within 2232 /// a function block. 2233 Stmt *SizeExpr; 2234 /// Brackets - The left and right array brackets. 2235 SourceRange Brackets; 2236 2237 VariableArrayType(QualType et, QualType can, Expr *e, 2238 ArraySizeModifier sm, unsigned tq, 2239 SourceRange brackets) 2240 : ArrayType(VariableArray, et, can, sm, tq, 2241 et->containsUnexpandedParameterPack()), 2242 SizeExpr((Stmt*) e), Brackets(brackets) {} 2243 friend class ASTContext; // ASTContext creates these. 2244 2245public: 2246 Expr *getSizeExpr() const { 2247 // We use C-style casts instead of cast<> here because we do not wish 2248 // to have a dependency of Type.h on Stmt.h/Expr.h. 2249 return (Expr*) SizeExpr; 2250 } 2251 SourceRange getBracketsRange() const { return Brackets; } 2252 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2253 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2254 2255 bool isSugared() const { return false; } 2256 QualType desugar() const { return QualType(this, 0); } 2257 2258 static bool classof(const Type *T) { 2259 return T->getTypeClass() == VariableArray; 2260 } 2261 static bool classof(const VariableArrayType *) { return true; } 2262 2263 friend class StmtIteratorBase; 2264 2265 void Profile(llvm::FoldingSetNodeID &ID) { 2266 llvm_unreachable("Cannot unique VariableArrayTypes."); 2267 } 2268}; 2269 2270/// DependentSizedArrayType - This type represents an array type in 2271/// C++ whose size is a value-dependent expression. For example: 2272/// 2273/// \code 2274/// template<typename T, int Size> 2275/// class array { 2276/// T data[Size]; 2277/// }; 2278/// \endcode 2279/// 2280/// For these types, we won't actually know what the array bound is 2281/// until template instantiation occurs, at which point this will 2282/// become either a ConstantArrayType or a VariableArrayType. 2283class DependentSizedArrayType : public ArrayType { 2284 const ASTContext &Context; 2285 2286 /// \brief An assignment expression that will instantiate to the 2287 /// size of the array. 2288 /// 2289 /// The expression itself might be NULL, in which case the array 2290 /// type will have its size deduced from an initializer. 2291 Stmt *SizeExpr; 2292 2293 /// Brackets - The left and right array brackets. 2294 SourceRange Brackets; 2295 2296 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2297 Expr *e, ArraySizeModifier sm, unsigned tq, 2298 SourceRange brackets); 2299 2300 friend class ASTContext; // ASTContext creates these. 2301 2302public: 2303 Expr *getSizeExpr() const { 2304 // We use C-style casts instead of cast<> here because we do not wish 2305 // to have a dependency of Type.h on Stmt.h/Expr.h. 2306 return (Expr*) SizeExpr; 2307 } 2308 SourceRange getBracketsRange() const { return Brackets; } 2309 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2310 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2311 2312 bool isSugared() const { return false; } 2313 QualType desugar() const { return QualType(this, 0); } 2314 2315 static bool classof(const Type *T) { 2316 return T->getTypeClass() == DependentSizedArray; 2317 } 2318 static bool classof(const DependentSizedArrayType *) { return true; } 2319 2320 friend class StmtIteratorBase; 2321 2322 2323 void Profile(llvm::FoldingSetNodeID &ID) { 2324 Profile(ID, Context, getElementType(), 2325 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2326 } 2327 2328 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2329 QualType ET, ArraySizeModifier SizeMod, 2330 unsigned TypeQuals, Expr *E); 2331}; 2332 2333/// DependentSizedExtVectorType - This type represent an extended vector type 2334/// where either the type or size is dependent. For example: 2335/// @code 2336/// template<typename T, int Size> 2337/// class vector { 2338/// typedef T __attribute__((ext_vector_type(Size))) type; 2339/// } 2340/// @endcode 2341class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2342 const ASTContext &Context; 2343 Expr *SizeExpr; 2344 /// ElementType - The element type of the array. 2345 QualType ElementType; 2346 SourceLocation loc; 2347 2348 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2349 QualType can, Expr *SizeExpr, SourceLocation loc); 2350 2351 friend class ASTContext; 2352 2353public: 2354 Expr *getSizeExpr() const { return SizeExpr; } 2355 QualType getElementType() const { return ElementType; } 2356 SourceLocation getAttributeLoc() const { return loc; } 2357 2358 bool isSugared() const { return false; } 2359 QualType desugar() const { return QualType(this, 0); } 2360 2361 static bool classof(const Type *T) { 2362 return T->getTypeClass() == DependentSizedExtVector; 2363 } 2364 static bool classof(const DependentSizedExtVectorType *) { return true; } 2365 2366 void Profile(llvm::FoldingSetNodeID &ID) { 2367 Profile(ID, Context, getElementType(), getSizeExpr()); 2368 } 2369 2370 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2371 QualType ElementType, Expr *SizeExpr); 2372}; 2373 2374 2375/// VectorType - GCC generic vector type. This type is created using 2376/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2377/// bytes; or from an Altivec __vector or vector declaration. 2378/// Since the constructor takes the number of vector elements, the 2379/// client is responsible for converting the size into the number of elements. 2380class VectorType : public Type, public llvm::FoldingSetNode { 2381public: 2382 enum VectorKind { 2383 GenericVector, // not a target-specific vector type 2384 AltiVecVector, // is AltiVec vector 2385 AltiVecPixel, // is AltiVec 'vector Pixel' 2386 AltiVecBool, // is AltiVec 'vector bool ...' 2387 NeonVector, // is ARM Neon vector 2388 NeonPolyVector // is ARM Neon polynomial vector 2389 }; 2390protected: 2391 /// ElementType - The element type of the vector. 2392 QualType ElementType; 2393 2394 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2395 VectorKind vecKind); 2396 2397 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2398 QualType canonType, VectorKind vecKind); 2399 2400 friend class ASTContext; // ASTContext creates these. 2401 2402public: 2403 2404 QualType getElementType() const { return ElementType; } 2405 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2406 2407 bool isSugared() const { return false; } 2408 QualType desugar() const { return QualType(this, 0); } 2409 2410 VectorKind getVectorKind() const { 2411 return VectorKind(VectorTypeBits.VecKind); 2412 } 2413 2414 void Profile(llvm::FoldingSetNodeID &ID) { 2415 Profile(ID, getElementType(), getNumElements(), 2416 getTypeClass(), getVectorKind()); 2417 } 2418 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2419 unsigned NumElements, TypeClass TypeClass, 2420 VectorKind VecKind) { 2421 ID.AddPointer(ElementType.getAsOpaquePtr()); 2422 ID.AddInteger(NumElements); 2423 ID.AddInteger(TypeClass); 2424 ID.AddInteger(VecKind); 2425 } 2426 2427 static bool classof(const Type *T) { 2428 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2429 } 2430 static bool classof(const VectorType *) { return true; } 2431}; 2432 2433/// ExtVectorType - Extended vector type. This type is created using 2434/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2435/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2436/// class enables syntactic extensions, like Vector Components for accessing 2437/// points, colors, and textures (modeled after OpenGL Shading Language). 2438class ExtVectorType : public VectorType { 2439 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2440 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2441 friend class ASTContext; // ASTContext creates these. 2442public: 2443 static int getPointAccessorIdx(char c) { 2444 switch (c) { 2445 default: return -1; 2446 case 'x': return 0; 2447 case 'y': return 1; 2448 case 'z': return 2; 2449 case 'w': return 3; 2450 } 2451 } 2452 static int getNumericAccessorIdx(char c) { 2453 switch (c) { 2454 default: return -1; 2455 case '0': return 0; 2456 case '1': return 1; 2457 case '2': return 2; 2458 case '3': return 3; 2459 case '4': return 4; 2460 case '5': return 5; 2461 case '6': return 6; 2462 case '7': return 7; 2463 case '8': return 8; 2464 case '9': return 9; 2465 case 'A': 2466 case 'a': return 10; 2467 case 'B': 2468 case 'b': return 11; 2469 case 'C': 2470 case 'c': return 12; 2471 case 'D': 2472 case 'd': return 13; 2473 case 'E': 2474 case 'e': return 14; 2475 case 'F': 2476 case 'f': return 15; 2477 } 2478 } 2479 2480 static int getAccessorIdx(char c) { 2481 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2482 return getNumericAccessorIdx(c); 2483 } 2484 2485 bool isAccessorWithinNumElements(char c) const { 2486 if (int idx = getAccessorIdx(c)+1) 2487 return unsigned(idx-1) < getNumElements(); 2488 return false; 2489 } 2490 bool isSugared() const { return false; } 2491 QualType desugar() const { return QualType(this, 0); } 2492 2493 static bool classof(const Type *T) { 2494 return T->getTypeClass() == ExtVector; 2495 } 2496 static bool classof(const ExtVectorType *) { return true; } 2497}; 2498 2499/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2500/// class of FunctionNoProtoType and FunctionProtoType. 2501/// 2502class FunctionType : public Type { 2503 // The type returned by the function. 2504 QualType ResultType; 2505 2506 public: 2507 /// ExtInfo - A class which abstracts out some details necessary for 2508 /// making a call. 2509 /// 2510 /// It is not actually used directly for storing this information in 2511 /// a FunctionType, although FunctionType does currently use the 2512 /// same bit-pattern. 2513 /// 2514 // If you add a field (say Foo), other than the obvious places (both, 2515 // constructors, compile failures), what you need to update is 2516 // * Operator== 2517 // * getFoo 2518 // * withFoo 2519 // * functionType. Add Foo, getFoo. 2520 // * ASTContext::getFooType 2521 // * ASTContext::mergeFunctionTypes 2522 // * FunctionNoProtoType::Profile 2523 // * FunctionProtoType::Profile 2524 // * TypePrinter::PrintFunctionProto 2525 // * AST read and write 2526 // * Codegen 2527 class ExtInfo { 2528 // Feel free to rearrange or add bits, but if you go over 8, 2529 // you'll need to adjust both the Bits field below and 2530 // Type::FunctionTypeBitfields. 2531 2532 // | CC |noreturn|produces|regparm| 2533 // |0 .. 2| 3 | 4 | 5 .. 7| 2534 // 2535 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2536 enum { CallConvMask = 0x7 }; 2537 enum { NoReturnMask = 0x8 }; 2538 enum { ProducesResultMask = 0x10 }; 2539 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2540 RegParmOffset = 5 }; // Assumed to be the last field 2541 2542 uint16_t Bits; 2543 2544 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2545 2546 friend class FunctionType; 2547 2548 public: 2549 // Constructor with no defaults. Use this when you know that you 2550 // have all the elements (when reading an AST file for example). 2551 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2552 bool producesResult) { 2553 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2554 Bits = ((unsigned) cc) | 2555 (noReturn ? NoReturnMask : 0) | 2556 (producesResult ? ProducesResultMask : 0) | 2557 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2558 } 2559 2560 // Constructor with all defaults. Use when for example creating a 2561 // function know to use defaults. 2562 ExtInfo() : Bits(0) {} 2563 2564 bool getNoReturn() const { return Bits & NoReturnMask; } 2565 bool getProducesResult() const { return Bits & ProducesResultMask; } 2566 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2567 unsigned getRegParm() const { 2568 unsigned RegParm = Bits >> RegParmOffset; 2569 if (RegParm > 0) 2570 --RegParm; 2571 return RegParm; 2572 } 2573 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2574 2575 bool operator==(ExtInfo Other) const { 2576 return Bits == Other.Bits; 2577 } 2578 bool operator!=(ExtInfo Other) const { 2579 return Bits != Other.Bits; 2580 } 2581 2582 // Note that we don't have setters. That is by design, use 2583 // the following with methods instead of mutating these objects. 2584 2585 ExtInfo withNoReturn(bool noReturn) const { 2586 if (noReturn) 2587 return ExtInfo(Bits | NoReturnMask); 2588 else 2589 return ExtInfo(Bits & ~NoReturnMask); 2590 } 2591 2592 ExtInfo withProducesResult(bool producesResult) const { 2593 if (producesResult) 2594 return ExtInfo(Bits | ProducesResultMask); 2595 else 2596 return ExtInfo(Bits & ~ProducesResultMask); 2597 } 2598 2599 ExtInfo withRegParm(unsigned RegParm) const { 2600 assert(RegParm < 7 && "Invalid regparm value"); 2601 return ExtInfo((Bits & ~RegParmMask) | 2602 ((RegParm + 1) << RegParmOffset)); 2603 } 2604 2605 ExtInfo withCallingConv(CallingConv cc) const { 2606 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2607 } 2608 2609 void Profile(llvm::FoldingSetNodeID &ID) const { 2610 ID.AddInteger(Bits); 2611 } 2612 }; 2613 2614protected: 2615 FunctionType(TypeClass tc, QualType res, 2616 unsigned typeQuals, RefQualifierKind RefQualifier, 2617 QualType Canonical, bool Dependent, 2618 bool InstantiationDependent, 2619 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2620 ExtInfo Info) 2621 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2622 ContainsUnexpandedParameterPack), 2623 ResultType(res) { 2624 FunctionTypeBits.ExtInfo = Info.Bits; 2625 FunctionTypeBits.TypeQuals = typeQuals; 2626 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2627 } 2628 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2629 2630 RefQualifierKind getRefQualifier() const { 2631 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2632 } 2633 2634public: 2635 2636 QualType getResultType() const { return ResultType; } 2637 2638 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2639 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2640 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2641 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2642 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2643 2644 /// \brief Determine the type of an expression that calls a function of 2645 /// this type. 2646 QualType getCallResultType(ASTContext &Context) const { 2647 return getResultType().getNonLValueExprType(Context); 2648 } 2649 2650 static StringRef getNameForCallConv(CallingConv CC); 2651 2652 static bool classof(const Type *T) { 2653 return T->getTypeClass() == FunctionNoProto || 2654 T->getTypeClass() == FunctionProto; 2655 } 2656 static bool classof(const FunctionType *) { return true; } 2657}; 2658 2659/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2660/// no information available about its arguments. 2661class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2662 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2663 : FunctionType(FunctionNoProto, Result, 0, RQ_None, Canonical, 2664 /*Dependent=*/false, /*InstantiationDependent=*/false, 2665 Result->isVariablyModifiedType(), 2666 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2667 2668 friend class ASTContext; // ASTContext creates these. 2669 2670public: 2671 // No additional state past what FunctionType provides. 2672 2673 bool isSugared() const { return false; } 2674 QualType desugar() const { return QualType(this, 0); } 2675 2676 void Profile(llvm::FoldingSetNodeID &ID) { 2677 Profile(ID, getResultType(), getExtInfo()); 2678 } 2679 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2680 ExtInfo Info) { 2681 Info.Profile(ID); 2682 ID.AddPointer(ResultType.getAsOpaquePtr()); 2683 } 2684 2685 static bool classof(const Type *T) { 2686 return T->getTypeClass() == FunctionNoProto; 2687 } 2688 static bool classof(const FunctionNoProtoType *) { return true; } 2689}; 2690 2691/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2692/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2693/// arguments, not as having a single void argument. Such a type can have an 2694/// exception specification, but this specification is not part of the canonical 2695/// type. 2696class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2697public: 2698 /// ExtProtoInfo - Extra information about a function prototype. 2699 struct ExtProtoInfo { 2700 ExtProtoInfo() : 2701 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2702 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2703 NumExceptions(0), Exceptions(0), NoexceptExpr(0), ConsumedArguments(0) {} 2704 2705 FunctionType::ExtInfo ExtInfo; 2706 bool Variadic : 1; 2707 bool HasTrailingReturn : 1; 2708 unsigned char TypeQuals; 2709 ExceptionSpecificationType ExceptionSpecType; 2710 RefQualifierKind RefQualifier; 2711 unsigned NumExceptions; 2712 const QualType *Exceptions; 2713 Expr *NoexceptExpr; 2714 const bool *ConsumedArguments; 2715 }; 2716 2717private: 2718 /// \brief Determine whether there are any argument types that 2719 /// contain an unexpanded parameter pack. 2720 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2721 unsigned numArgs) { 2722 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2723 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2724 return true; 2725 2726 return false; 2727 } 2728 2729 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2730 QualType canonical, const ExtProtoInfo &epi); 2731 2732 /// NumArgs - The number of arguments this function has, not counting '...'. 2733 unsigned NumArgs : 17; 2734 2735 /// NumExceptions - The number of types in the exception spec, if any. 2736 unsigned NumExceptions : 9; 2737 2738 /// ExceptionSpecType - The type of exception specification this function has. 2739 unsigned ExceptionSpecType : 3; 2740 2741 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2742 unsigned HasAnyConsumedArgs : 1; 2743 2744 /// Variadic - Whether the function is variadic. 2745 unsigned Variadic : 1; 2746 2747 /// HasTrailingReturn - Whether this function has a trailing return type. 2748 unsigned HasTrailingReturn : 1; 2749 2750 // ArgInfo - There is an variable size array after the class in memory that 2751 // holds the argument types. 2752 2753 // Exceptions - There is another variable size array after ArgInfo that 2754 // holds the exception types. 2755 2756 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2757 // to the expression in the noexcept() specifier. 2758 2759 // ConsumedArgs - A variable size array, following Exceptions 2760 // and of length NumArgs, holding flags indicating which arguments 2761 // are consumed. This only appears if HasAnyConsumedArgs is true. 2762 2763 friend class ASTContext; // ASTContext creates these. 2764 2765 const bool *getConsumedArgsBuffer() const { 2766 assert(hasAnyConsumedArgs()); 2767 2768 // Find the end of the exceptions. 2769 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2770 if (getExceptionSpecType() != EST_ComputedNoexcept) 2771 eh_end += NumExceptions; 2772 else 2773 eh_end += 1; // NoexceptExpr 2774 2775 return reinterpret_cast<const bool*>(eh_end); 2776 } 2777 2778public: 2779 unsigned getNumArgs() const { return NumArgs; } 2780 QualType getArgType(unsigned i) const { 2781 assert(i < NumArgs && "Invalid argument number!"); 2782 return arg_type_begin()[i]; 2783 } 2784 2785 ExtProtoInfo getExtProtoInfo() const { 2786 ExtProtoInfo EPI; 2787 EPI.ExtInfo = getExtInfo(); 2788 EPI.Variadic = isVariadic(); 2789 EPI.HasTrailingReturn = hasTrailingReturn(); 2790 EPI.ExceptionSpecType = getExceptionSpecType(); 2791 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2792 EPI.RefQualifier = getRefQualifier(); 2793 if (EPI.ExceptionSpecType == EST_Dynamic) { 2794 EPI.NumExceptions = NumExceptions; 2795 EPI.Exceptions = exception_begin(); 2796 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2797 EPI.NoexceptExpr = getNoexceptExpr(); 2798 } 2799 if (hasAnyConsumedArgs()) 2800 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2801 return EPI; 2802 } 2803 2804 /// \brief Get the kind of exception specification on this function. 2805 ExceptionSpecificationType getExceptionSpecType() const { 2806 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2807 } 2808 /// \brief Return whether this function has any kind of exception spec. 2809 bool hasExceptionSpec() const { 2810 return getExceptionSpecType() != EST_None; 2811 } 2812 /// \brief Return whether this function has a dynamic (throw) exception spec. 2813 bool hasDynamicExceptionSpec() const { 2814 return isDynamicExceptionSpec(getExceptionSpecType()); 2815 } 2816 /// \brief Return whether this function has a noexcept exception spec. 2817 bool hasNoexceptExceptionSpec() const { 2818 return isNoexceptExceptionSpec(getExceptionSpecType()); 2819 } 2820 /// \brief Result type of getNoexceptSpec(). 2821 enum NoexceptResult { 2822 NR_NoNoexcept, ///< There is no noexcept specifier. 2823 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2824 NR_Dependent, ///< The noexcept specifier is dependent. 2825 NR_Throw, ///< The noexcept specifier evaluates to false. 2826 NR_Nothrow ///< The noexcept specifier evaluates to true. 2827 }; 2828 /// \brief Get the meaning of the noexcept spec on this function, if any. 2829 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2830 unsigned getNumExceptions() const { return NumExceptions; } 2831 QualType getExceptionType(unsigned i) const { 2832 assert(i < NumExceptions && "Invalid exception number!"); 2833 return exception_begin()[i]; 2834 } 2835 Expr *getNoexceptExpr() const { 2836 if (getExceptionSpecType() != EST_ComputedNoexcept) 2837 return 0; 2838 // NoexceptExpr sits where the arguments end. 2839 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2840 } 2841 bool isNothrow(ASTContext &Ctx) const { 2842 ExceptionSpecificationType EST = getExceptionSpecType(); 2843 assert(EST != EST_Delayed); 2844 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2845 return true; 2846 if (EST != EST_ComputedNoexcept) 2847 return false; 2848 return getNoexceptSpec(Ctx) == NR_Nothrow; 2849 } 2850 2851 bool isVariadic() const { return Variadic; } 2852 2853 /// \brief Determines whether this function prototype contains a 2854 /// parameter pack at the end. 2855 /// 2856 /// A function template whose last parameter is a parameter pack can be 2857 /// called with an arbitrary number of arguments, much like a variadic 2858 /// function. 2859 bool isTemplateVariadic() const; 2860 2861 bool hasTrailingReturn() const { return HasTrailingReturn; } 2862 2863 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2864 2865 2866 /// \brief Retrieve the ref-qualifier associated with this function type. 2867 RefQualifierKind getRefQualifier() const { 2868 return FunctionType::getRefQualifier(); 2869 } 2870 2871 typedef const QualType *arg_type_iterator; 2872 arg_type_iterator arg_type_begin() const { 2873 return reinterpret_cast<const QualType *>(this+1); 2874 } 2875 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2876 2877 typedef const QualType *exception_iterator; 2878 exception_iterator exception_begin() const { 2879 // exceptions begin where arguments end 2880 return arg_type_end(); 2881 } 2882 exception_iterator exception_end() const { 2883 if (getExceptionSpecType() != EST_Dynamic) 2884 return exception_begin(); 2885 return exception_begin() + NumExceptions; 2886 } 2887 2888 bool hasAnyConsumedArgs() const { 2889 return HasAnyConsumedArgs; 2890 } 2891 bool isArgConsumed(unsigned I) const { 2892 assert(I < getNumArgs() && "argument index out of range!"); 2893 if (hasAnyConsumedArgs()) 2894 return getConsumedArgsBuffer()[I]; 2895 return false; 2896 } 2897 2898 bool isSugared() const { return false; } 2899 QualType desugar() const { return QualType(this, 0); } 2900 2901 void printExceptionSpecification(std::string &S, 2902 PrintingPolicy Policy) const; 2903 2904 static bool classof(const Type *T) { 2905 return T->getTypeClass() == FunctionProto; 2906 } 2907 static bool classof(const FunctionProtoType *) { return true; } 2908 2909 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2910 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2911 arg_type_iterator ArgTys, unsigned NumArgs, 2912 const ExtProtoInfo &EPI, const ASTContext &Context); 2913}; 2914 2915 2916/// \brief Represents the dependent type named by a dependently-scoped 2917/// typename using declaration, e.g. 2918/// using typename Base<T>::foo; 2919/// Template instantiation turns these into the underlying type. 2920class UnresolvedUsingType : public Type { 2921 UnresolvedUsingTypenameDecl *Decl; 2922 2923 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2924 : Type(UnresolvedUsing, QualType(), true, true, false, 2925 /*ContainsUnexpandedParameterPack=*/false), 2926 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2927 friend class ASTContext; // ASTContext creates these. 2928public: 2929 2930 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2931 2932 bool isSugared() const { return false; } 2933 QualType desugar() const { return QualType(this, 0); } 2934 2935 static bool classof(const Type *T) { 2936 return T->getTypeClass() == UnresolvedUsing; 2937 } 2938 static bool classof(const UnresolvedUsingType *) { return true; } 2939 2940 void Profile(llvm::FoldingSetNodeID &ID) { 2941 return Profile(ID, Decl); 2942 } 2943 static void Profile(llvm::FoldingSetNodeID &ID, 2944 UnresolvedUsingTypenameDecl *D) { 2945 ID.AddPointer(D); 2946 } 2947}; 2948 2949 2950class TypedefType : public Type { 2951 TypedefNameDecl *Decl; 2952protected: 2953 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2954 : Type(tc, can, can->isDependentType(), 2955 can->isInstantiationDependentType(), 2956 can->isVariablyModifiedType(), 2957 /*ContainsUnexpandedParameterPack=*/false), 2958 Decl(const_cast<TypedefNameDecl*>(D)) { 2959 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2960 } 2961 friend class ASTContext; // ASTContext creates these. 2962public: 2963 2964 TypedefNameDecl *getDecl() const { return Decl; } 2965 2966 bool isSugared() const { return true; } 2967 QualType desugar() const; 2968 2969 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2970 static bool classof(const TypedefType *) { return true; } 2971}; 2972 2973/// TypeOfExprType (GCC extension). 2974class TypeOfExprType : public Type { 2975 Expr *TOExpr; 2976 2977protected: 2978 TypeOfExprType(Expr *E, QualType can = QualType()); 2979 friend class ASTContext; // ASTContext creates these. 2980public: 2981 Expr *getUnderlyingExpr() const { return TOExpr; } 2982 2983 /// \brief Remove a single level of sugar. 2984 QualType desugar() const; 2985 2986 /// \brief Returns whether this type directly provides sugar. 2987 bool isSugared() const; 2988 2989 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2990 static bool classof(const TypeOfExprType *) { return true; } 2991}; 2992 2993/// \brief Internal representation of canonical, dependent 2994/// typeof(expr) types. 2995/// 2996/// This class is used internally by the ASTContext to manage 2997/// canonical, dependent types, only. Clients will only see instances 2998/// of this class via TypeOfExprType nodes. 2999class DependentTypeOfExprType 3000 : public TypeOfExprType, public llvm::FoldingSetNode { 3001 const ASTContext &Context; 3002 3003public: 3004 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3005 : TypeOfExprType(E), Context(Context) { } 3006 3007 void Profile(llvm::FoldingSetNodeID &ID) { 3008 Profile(ID, Context, getUnderlyingExpr()); 3009 } 3010 3011 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3012 Expr *E); 3013}; 3014 3015/// TypeOfType (GCC extension). 3016class TypeOfType : public Type { 3017 QualType TOType; 3018 TypeOfType(QualType T, QualType can) 3019 : Type(TypeOf, can, T->isDependentType(), 3020 T->isInstantiationDependentType(), 3021 T->isVariablyModifiedType(), 3022 T->containsUnexpandedParameterPack()), 3023 TOType(T) { 3024 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3025 } 3026 friend class ASTContext; // ASTContext creates these. 3027public: 3028 QualType getUnderlyingType() const { return TOType; } 3029 3030 /// \brief Remove a single level of sugar. 3031 QualType desugar() const { return getUnderlyingType(); } 3032 3033 /// \brief Returns whether this type directly provides sugar. 3034 bool isSugared() const { return true; } 3035 3036 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3037 static bool classof(const TypeOfType *) { return true; } 3038}; 3039 3040/// DecltypeType (C++0x) 3041class DecltypeType : public Type { 3042 Expr *E; 3043 QualType UnderlyingType; 3044 3045protected: 3046 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3047 friend class ASTContext; // ASTContext creates these. 3048public: 3049 Expr *getUnderlyingExpr() const { return E; } 3050 QualType getUnderlyingType() const { return UnderlyingType; } 3051 3052 /// \brief Remove a single level of sugar. 3053 QualType desugar() const; 3054 3055 /// \brief Returns whether this type directly provides sugar. 3056 bool isSugared() const; 3057 3058 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3059 static bool classof(const DecltypeType *) { return true; } 3060}; 3061 3062/// \brief Internal representation of canonical, dependent 3063/// decltype(expr) types. 3064/// 3065/// This class is used internally by the ASTContext to manage 3066/// canonical, dependent types, only. Clients will only see instances 3067/// of this class via DecltypeType nodes. 3068class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3069 const ASTContext &Context; 3070 3071public: 3072 DependentDecltypeType(const ASTContext &Context, Expr *E); 3073 3074 void Profile(llvm::FoldingSetNodeID &ID) { 3075 Profile(ID, Context, getUnderlyingExpr()); 3076 } 3077 3078 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3079 Expr *E); 3080}; 3081 3082/// \brief A unary type transform, which is a type constructed from another 3083class UnaryTransformType : public Type { 3084public: 3085 enum UTTKind { 3086 EnumUnderlyingType 3087 }; 3088 3089private: 3090 /// The untransformed type. 3091 QualType BaseType; 3092 /// The transformed type if not dependent, otherwise the same as BaseType. 3093 QualType UnderlyingType; 3094 3095 UTTKind UKind; 3096protected: 3097 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3098 QualType CanonicalTy); 3099 friend class ASTContext; 3100public: 3101 bool isSugared() const { return !isDependentType(); } 3102 QualType desugar() const { return UnderlyingType; } 3103 3104 QualType getUnderlyingType() const { return UnderlyingType; } 3105 QualType getBaseType() const { return BaseType; } 3106 3107 UTTKind getUTTKind() const { return UKind; } 3108 3109 static bool classof(const Type *T) { 3110 return T->getTypeClass() == UnaryTransform; 3111 } 3112 static bool classof(const UnaryTransformType *) { return true; } 3113}; 3114 3115class TagType : public Type { 3116 /// Stores the TagDecl associated with this type. The decl may point to any 3117 /// TagDecl that declares the entity. 3118 TagDecl * decl; 3119 3120 friend class ASTReader; 3121 3122protected: 3123 TagType(TypeClass TC, const TagDecl *D, QualType can); 3124 3125public: 3126 TagDecl *getDecl() const; 3127 3128 /// @brief Determines whether this type is in the process of being 3129 /// defined. 3130 bool isBeingDefined() const; 3131 3132 static bool classof(const Type *T) { 3133 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3134 } 3135 static bool classof(const TagType *) { return true; } 3136}; 3137 3138/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3139/// to detect TagType objects of structs/unions/classes. 3140class RecordType : public TagType { 3141protected: 3142 explicit RecordType(const RecordDecl *D) 3143 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3144 explicit RecordType(TypeClass TC, RecordDecl *D) 3145 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3146 friend class ASTContext; // ASTContext creates these. 3147public: 3148 3149 RecordDecl *getDecl() const { 3150 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3151 } 3152 3153 // FIXME: This predicate is a helper to QualType/Type. It needs to 3154 // recursively check all fields for const-ness. If any field is declared 3155 // const, it needs to return false. 3156 bool hasConstFields() const { return false; } 3157 3158 bool isSugared() const { return false; } 3159 QualType desugar() const { return QualType(this, 0); } 3160 3161 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3162 static bool classof(const RecordType *) { return true; } 3163}; 3164 3165/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3166/// to detect TagType objects of enums. 3167class EnumType : public TagType { 3168 explicit EnumType(const EnumDecl *D) 3169 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3170 friend class ASTContext; // ASTContext creates these. 3171public: 3172 3173 EnumDecl *getDecl() const { 3174 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3175 } 3176 3177 bool isSugared() const { return false; } 3178 QualType desugar() const { return QualType(this, 0); } 3179 3180 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3181 static bool classof(const EnumType *) { return true; } 3182}; 3183 3184/// AttributedType - An attributed type is a type to which a type 3185/// attribute has been applied. The "modified type" is the 3186/// fully-sugared type to which the attributed type was applied; 3187/// generally it is not canonically equivalent to the attributed type. 3188/// The "equivalent type" is the minimally-desugared type which the 3189/// type is canonically equivalent to. 3190/// 3191/// For example, in the following attributed type: 3192/// int32_t __attribute__((vector_size(16))) 3193/// - the modified type is the TypedefType for int32_t 3194/// - the equivalent type is VectorType(16, int32_t) 3195/// - the canonical type is VectorType(16, int) 3196class AttributedType : public Type, public llvm::FoldingSetNode { 3197public: 3198 // It is really silly to have yet another attribute-kind enum, but 3199 // clang::attr::Kind doesn't currently cover the pure type attrs. 3200 enum Kind { 3201 // Expression operand. 3202 attr_address_space, 3203 attr_regparm, 3204 attr_vector_size, 3205 attr_neon_vector_type, 3206 attr_neon_polyvector_type, 3207 3208 FirstExprOperandKind = attr_address_space, 3209 LastExprOperandKind = attr_neon_polyvector_type, 3210 3211 // Enumerated operand (string or keyword). 3212 attr_objc_gc, 3213 attr_objc_ownership, 3214 attr_pcs, 3215 3216 FirstEnumOperandKind = attr_objc_gc, 3217 LastEnumOperandKind = attr_pcs, 3218 3219 // No operand. 3220 attr_noreturn, 3221 attr_cdecl, 3222 attr_fastcall, 3223 attr_stdcall, 3224 attr_thiscall, 3225 attr_pascal 3226 }; 3227 3228private: 3229 QualType ModifiedType; 3230 QualType EquivalentType; 3231 3232 friend class ASTContext; // creates these 3233 3234 AttributedType(QualType canon, Kind attrKind, 3235 QualType modified, QualType equivalent) 3236 : Type(Attributed, canon, canon->isDependentType(), 3237 canon->isInstantiationDependentType(), 3238 canon->isVariablyModifiedType(), 3239 canon->containsUnexpandedParameterPack()), 3240 ModifiedType(modified), EquivalentType(equivalent) { 3241 AttributedTypeBits.AttrKind = attrKind; 3242 } 3243 3244public: 3245 Kind getAttrKind() const { 3246 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3247 } 3248 3249 QualType getModifiedType() const { return ModifiedType; } 3250 QualType getEquivalentType() const { return EquivalentType; } 3251 3252 bool isSugared() const { return true; } 3253 QualType desugar() const { return getEquivalentType(); } 3254 3255 void Profile(llvm::FoldingSetNodeID &ID) { 3256 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3257 } 3258 3259 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3260 QualType modified, QualType equivalent) { 3261 ID.AddInteger(attrKind); 3262 ID.AddPointer(modified.getAsOpaquePtr()); 3263 ID.AddPointer(equivalent.getAsOpaquePtr()); 3264 } 3265 3266 static bool classof(const Type *T) { 3267 return T->getTypeClass() == Attributed; 3268 } 3269 static bool classof(const AttributedType *T) { return true; } 3270}; 3271 3272class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3273 // Helper data collector for canonical types. 3274 struct CanonicalTTPTInfo { 3275 unsigned Depth : 15; 3276 unsigned ParameterPack : 1; 3277 unsigned Index : 16; 3278 }; 3279 3280 union { 3281 // Info for the canonical type. 3282 CanonicalTTPTInfo CanTTPTInfo; 3283 // Info for the non-canonical type. 3284 TemplateTypeParmDecl *TTPDecl; 3285 }; 3286 3287 /// Build a non-canonical type. 3288 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3289 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3290 /*InstantiationDependent=*/true, 3291 /*VariablyModified=*/false, 3292 Canon->containsUnexpandedParameterPack()), 3293 TTPDecl(TTPDecl) { } 3294 3295 /// Build the canonical type. 3296 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3297 : Type(TemplateTypeParm, QualType(this, 0), 3298 /*Dependent=*/true, 3299 /*InstantiationDependent=*/true, 3300 /*VariablyModified=*/false, PP) { 3301 CanTTPTInfo.Depth = D; 3302 CanTTPTInfo.Index = I; 3303 CanTTPTInfo.ParameterPack = PP; 3304 } 3305 3306 friend class ASTContext; // ASTContext creates these 3307 3308 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3309 QualType Can = getCanonicalTypeInternal(); 3310 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3311 } 3312 3313public: 3314 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3315 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3316 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3317 3318 TemplateTypeParmDecl *getDecl() const { 3319 return isCanonicalUnqualified() ? 0 : TTPDecl; 3320 } 3321 3322 IdentifierInfo *getIdentifier() const; 3323 3324 bool isSugared() const { return false; } 3325 QualType desugar() const { return QualType(this, 0); } 3326 3327 void Profile(llvm::FoldingSetNodeID &ID) { 3328 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3329 } 3330 3331 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3332 unsigned Index, bool ParameterPack, 3333 TemplateTypeParmDecl *TTPDecl) { 3334 ID.AddInteger(Depth); 3335 ID.AddInteger(Index); 3336 ID.AddBoolean(ParameterPack); 3337 ID.AddPointer(TTPDecl); 3338 } 3339 3340 static bool classof(const Type *T) { 3341 return T->getTypeClass() == TemplateTypeParm; 3342 } 3343 static bool classof(const TemplateTypeParmType *T) { return true; } 3344}; 3345 3346/// \brief Represents the result of substituting a type for a template 3347/// type parameter. 3348/// 3349/// Within an instantiated template, all template type parameters have 3350/// been replaced with these. They are used solely to record that a 3351/// type was originally written as a template type parameter; 3352/// therefore they are never canonical. 3353class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3354 // The original type parameter. 3355 const TemplateTypeParmType *Replaced; 3356 3357 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3358 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3359 Canon->isInstantiationDependentType(), 3360 Canon->isVariablyModifiedType(), 3361 Canon->containsUnexpandedParameterPack()), 3362 Replaced(Param) { } 3363 3364 friend class ASTContext; 3365 3366public: 3367 /// Gets the template parameter that was substituted for. 3368 const TemplateTypeParmType *getReplacedParameter() const { 3369 return Replaced; 3370 } 3371 3372 /// Gets the type that was substituted for the template 3373 /// parameter. 3374 QualType getReplacementType() const { 3375 return getCanonicalTypeInternal(); 3376 } 3377 3378 bool isSugared() const { return true; } 3379 QualType desugar() const { return getReplacementType(); } 3380 3381 void Profile(llvm::FoldingSetNodeID &ID) { 3382 Profile(ID, getReplacedParameter(), getReplacementType()); 3383 } 3384 static void Profile(llvm::FoldingSetNodeID &ID, 3385 const TemplateTypeParmType *Replaced, 3386 QualType Replacement) { 3387 ID.AddPointer(Replaced); 3388 ID.AddPointer(Replacement.getAsOpaquePtr()); 3389 } 3390 3391 static bool classof(const Type *T) { 3392 return T->getTypeClass() == SubstTemplateTypeParm; 3393 } 3394 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3395}; 3396 3397/// \brief Represents the result of substituting a set of types for a template 3398/// type parameter pack. 3399/// 3400/// When a pack expansion in the source code contains multiple parameter packs 3401/// and those parameter packs correspond to different levels of template 3402/// parameter lists, this type node is used to represent a template type 3403/// parameter pack from an outer level, which has already had its argument pack 3404/// substituted but that still lives within a pack expansion that itself 3405/// could not be instantiated. When actually performing a substitution into 3406/// that pack expansion (e.g., when all template parameters have corresponding 3407/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3408/// at the current pack substitution index. 3409class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3410 /// \brief The original type parameter. 3411 const TemplateTypeParmType *Replaced; 3412 3413 /// \brief A pointer to the set of template arguments that this 3414 /// parameter pack is instantiated with. 3415 const TemplateArgument *Arguments; 3416 3417 /// \brief The number of template arguments in \c Arguments. 3418 unsigned NumArguments; 3419 3420 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3421 QualType Canon, 3422 const TemplateArgument &ArgPack); 3423 3424 friend class ASTContext; 3425 3426public: 3427 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3428 3429 /// Gets the template parameter that was substituted for. 3430 const TemplateTypeParmType *getReplacedParameter() const { 3431 return Replaced; 3432 } 3433 3434 bool isSugared() const { return false; } 3435 QualType desugar() const { return QualType(this, 0); } 3436 3437 TemplateArgument getArgumentPack() const; 3438 3439 void Profile(llvm::FoldingSetNodeID &ID); 3440 static void Profile(llvm::FoldingSetNodeID &ID, 3441 const TemplateTypeParmType *Replaced, 3442 const TemplateArgument &ArgPack); 3443 3444 static bool classof(const Type *T) { 3445 return T->getTypeClass() == SubstTemplateTypeParmPack; 3446 } 3447 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3448}; 3449 3450/// \brief Represents a C++0x auto type. 3451/// 3452/// These types are usually a placeholder for a deduced type. However, within 3453/// templates and before the initializer is attached, there is no deduced type 3454/// and an auto type is type-dependent and canonical. 3455class AutoType : public Type, public llvm::FoldingSetNode { 3456 AutoType(QualType DeducedType) 3457 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3458 /*Dependent=*/DeducedType.isNull(), 3459 /*InstantiationDependent=*/DeducedType.isNull(), 3460 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3461 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3462 "deduced a dependent type for auto"); 3463 } 3464 3465 friend class ASTContext; // ASTContext creates these 3466 3467public: 3468 bool isSugared() const { return isDeduced(); } 3469 QualType desugar() const { return getCanonicalTypeInternal(); } 3470 3471 QualType getDeducedType() const { 3472 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3473 } 3474 bool isDeduced() const { 3475 return !isDependentType(); 3476 } 3477 3478 void Profile(llvm::FoldingSetNodeID &ID) { 3479 Profile(ID, getDeducedType()); 3480 } 3481 3482 static void Profile(llvm::FoldingSetNodeID &ID, 3483 QualType Deduced) { 3484 ID.AddPointer(Deduced.getAsOpaquePtr()); 3485 } 3486 3487 static bool classof(const Type *T) { 3488 return T->getTypeClass() == Auto; 3489 } 3490 static bool classof(const AutoType *T) { return true; } 3491}; 3492 3493/// \brief Represents a type template specialization; the template 3494/// must be a class template, a type alias template, or a template 3495/// template parameter. A template which cannot be resolved to one of 3496/// these, e.g. because it is written with a dependent scope 3497/// specifier, is instead represented as a 3498/// @c DependentTemplateSpecializationType. 3499/// 3500/// A non-dependent template specialization type is always "sugar", 3501/// typically for a @c RecordType. For example, a class template 3502/// specialization type of @c vector<int> will refer to a tag type for 3503/// the instantiation @c std::vector<int, std::allocator<int>> 3504/// 3505/// Template specializations are dependent if either the template or 3506/// any of the template arguments are dependent, in which case the 3507/// type may also be canonical. 3508/// 3509/// Instances of this type are allocated with a trailing array of 3510/// TemplateArguments, followed by a QualType representing the 3511/// non-canonical aliased type when the template is a type alias 3512/// template. 3513class TemplateSpecializationType 3514 : public Type, public llvm::FoldingSetNode { 3515 /// \brief The name of the template being specialized. This is 3516 /// either a TemplateName::Template (in which case it is a 3517 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3518 /// TypeAliasTemplateDecl*), a 3519 /// TemplateName::SubstTemplateTemplateParmPack, or a 3520 /// TemplateName::SubstTemplateTemplateParm (in which case the 3521 /// replacement must, recursively, be one of these). 3522 TemplateName Template; 3523 3524 /// \brief - The number of template arguments named in this class 3525 /// template specialization. 3526 unsigned NumArgs : 31; 3527 3528 /// \brief Whether this template specialization type is a substituted 3529 /// type alias. 3530 bool TypeAlias : 1; 3531 3532 TemplateSpecializationType(TemplateName T, 3533 const TemplateArgument *Args, 3534 unsigned NumArgs, QualType Canon, 3535 QualType Aliased); 3536 3537 friend class ASTContext; // ASTContext creates these 3538 3539public: 3540 /// \brief Determine whether any of the given template arguments are 3541 /// dependent. 3542 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3543 unsigned NumArgs, 3544 bool &InstantiationDependent); 3545 3546 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3547 unsigned NumArgs, 3548 bool &InstantiationDependent); 3549 3550 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3551 bool &InstantiationDependent); 3552 3553 /// \brief Print a template argument list, including the '<' and '>' 3554 /// enclosing the template arguments. 3555 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3556 unsigned NumArgs, 3557 const PrintingPolicy &Policy, 3558 bool SkipBrackets = false); 3559 3560 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3561 unsigned NumArgs, 3562 const PrintingPolicy &Policy); 3563 3564 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3565 const PrintingPolicy &Policy); 3566 3567 /// True if this template specialization type matches a current 3568 /// instantiation in the context in which it is found. 3569 bool isCurrentInstantiation() const { 3570 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3571 } 3572 3573 /// \brief Determine if this template specialization type is for a type alias 3574 /// template that has been substituted. 3575 /// 3576 /// Nearly every template specialization type whose template is an alias 3577 /// template will be substituted. However, this is not the case when 3578 /// the specialization contains a pack expansion but the template alias 3579 /// does not have a corresponding parameter pack, e.g., 3580 /// 3581 /// \code 3582 /// template<typename T, typename U, typename V> struct S; 3583 /// template<typename T, typename U> using A = S<T, int, U>; 3584 /// template<typename... Ts> struct X { 3585 /// typedef A<Ts...> type; // not a type alias 3586 /// }; 3587 /// \endcode 3588 bool isTypeAlias() const { return TypeAlias; } 3589 3590 /// Get the aliased type, if this is a specialization of a type alias 3591 /// template. 3592 QualType getAliasedType() const { 3593 assert(isTypeAlias() && "not a type alias template specialization"); 3594 return *reinterpret_cast<const QualType*>(end()); 3595 } 3596 3597 typedef const TemplateArgument * iterator; 3598 3599 iterator begin() const { return getArgs(); } 3600 iterator end() const; // defined inline in TemplateBase.h 3601 3602 /// \brief Retrieve the name of the template that we are specializing. 3603 TemplateName getTemplateName() const { return Template; } 3604 3605 /// \brief Retrieve the template arguments. 3606 const TemplateArgument *getArgs() const { 3607 return reinterpret_cast<const TemplateArgument *>(this + 1); 3608 } 3609 3610 /// \brief Retrieve the number of template arguments. 3611 unsigned getNumArgs() const { return NumArgs; } 3612 3613 /// \brief Retrieve a specific template argument as a type. 3614 /// \precondition @c isArgType(Arg) 3615 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3616 3617 bool isSugared() const { 3618 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3619 } 3620 QualType desugar() const { return getCanonicalTypeInternal(); } 3621 3622 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3623 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3624 if (isTypeAlias()) 3625 getAliasedType().Profile(ID); 3626 } 3627 3628 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3629 const TemplateArgument *Args, 3630 unsigned NumArgs, 3631 const ASTContext &Context); 3632 3633 static bool classof(const Type *T) { 3634 return T->getTypeClass() == TemplateSpecialization; 3635 } 3636 static bool classof(const TemplateSpecializationType *T) { return true; } 3637}; 3638 3639/// \brief The injected class name of a C++ class template or class 3640/// template partial specialization. Used to record that a type was 3641/// spelled with a bare identifier rather than as a template-id; the 3642/// equivalent for non-templated classes is just RecordType. 3643/// 3644/// Injected class name types are always dependent. Template 3645/// instantiation turns these into RecordTypes. 3646/// 3647/// Injected class name types are always canonical. This works 3648/// because it is impossible to compare an injected class name type 3649/// with the corresponding non-injected template type, for the same 3650/// reason that it is impossible to directly compare template 3651/// parameters from different dependent contexts: injected class name 3652/// types can only occur within the scope of a particular templated 3653/// declaration, and within that scope every template specialization 3654/// will canonicalize to the injected class name (when appropriate 3655/// according to the rules of the language). 3656class InjectedClassNameType : public Type { 3657 CXXRecordDecl *Decl; 3658 3659 /// The template specialization which this type represents. 3660 /// For example, in 3661 /// template <class T> class A { ... }; 3662 /// this is A<T>, whereas in 3663 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3664 /// this is A<B<X,Y> >. 3665 /// 3666 /// It is always unqualified, always a template specialization type, 3667 /// and always dependent. 3668 QualType InjectedType; 3669 3670 friend class ASTContext; // ASTContext creates these. 3671 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3672 // currently suitable for AST reading, too much 3673 // interdependencies. 3674 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3675 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3676 /*InstantiationDependent=*/true, 3677 /*VariablyModified=*/false, 3678 /*ContainsUnexpandedParameterPack=*/false), 3679 Decl(D), InjectedType(TST) { 3680 assert(isa<TemplateSpecializationType>(TST)); 3681 assert(!TST.hasQualifiers()); 3682 assert(TST->isDependentType()); 3683 } 3684 3685public: 3686 QualType getInjectedSpecializationType() const { return InjectedType; } 3687 const TemplateSpecializationType *getInjectedTST() const { 3688 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3689 } 3690 3691 CXXRecordDecl *getDecl() const; 3692 3693 bool isSugared() const { return false; } 3694 QualType desugar() const { return QualType(this, 0); } 3695 3696 static bool classof(const Type *T) { 3697 return T->getTypeClass() == InjectedClassName; 3698 } 3699 static bool classof(const InjectedClassNameType *T) { return true; } 3700}; 3701 3702/// \brief The kind of a tag type. 3703enum TagTypeKind { 3704 /// \brief The "struct" keyword. 3705 TTK_Struct, 3706 /// \brief The "union" keyword. 3707 TTK_Union, 3708 /// \brief The "class" keyword. 3709 TTK_Class, 3710 /// \brief The "enum" keyword. 3711 TTK_Enum 3712}; 3713 3714/// \brief The elaboration keyword that precedes a qualified type name or 3715/// introduces an elaborated-type-specifier. 3716enum ElaboratedTypeKeyword { 3717 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3718 ETK_Struct, 3719 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3720 ETK_Union, 3721 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3722 ETK_Class, 3723 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3724 ETK_Enum, 3725 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3726 /// \c typename T::type. 3727 ETK_Typename, 3728 /// \brief No keyword precedes the qualified type name. 3729 ETK_None 3730}; 3731 3732/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3733/// The keyword in stored in the free bits of the base class. 3734/// Also provides a few static helpers for converting and printing 3735/// elaborated type keyword and tag type kind enumerations. 3736class TypeWithKeyword : public Type { 3737protected: 3738 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3739 QualType Canonical, bool Dependent, 3740 bool InstantiationDependent, bool VariablyModified, 3741 bool ContainsUnexpandedParameterPack) 3742 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3743 ContainsUnexpandedParameterPack) { 3744 TypeWithKeywordBits.Keyword = Keyword; 3745 } 3746 3747public: 3748 ElaboratedTypeKeyword getKeyword() const { 3749 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3750 } 3751 3752 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3753 /// into an elaborated type keyword. 3754 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3755 3756 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3757 /// into a tag type kind. It is an error to provide a type specifier 3758 /// which *isn't* a tag kind here. 3759 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3760 3761 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3762 /// elaborated type keyword. 3763 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3764 3765 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3766 // a TagTypeKind. It is an error to provide an elaborated type keyword 3767 /// which *isn't* a tag kind here. 3768 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3769 3770 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3771 3772 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3773 3774 static const char *getTagTypeKindName(TagTypeKind Kind) { 3775 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3776 } 3777 3778 class CannotCastToThisType {}; 3779 static CannotCastToThisType classof(const Type *); 3780}; 3781 3782/// \brief Represents a type that was referred to using an elaborated type 3783/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3784/// or both. 3785/// 3786/// This type is used to keep track of a type name as written in the 3787/// source code, including tag keywords and any nested-name-specifiers. 3788/// The type itself is always "sugar", used to express what was written 3789/// in the source code but containing no additional semantic information. 3790class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3791 3792 /// \brief The nested name specifier containing the qualifier. 3793 NestedNameSpecifier *NNS; 3794 3795 /// \brief The type that this qualified name refers to. 3796 QualType NamedType; 3797 3798 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3799 QualType NamedType, QualType CanonType) 3800 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3801 NamedType->isDependentType(), 3802 NamedType->isInstantiationDependentType(), 3803 NamedType->isVariablyModifiedType(), 3804 NamedType->containsUnexpandedParameterPack()), 3805 NNS(NNS), NamedType(NamedType) { 3806 assert(!(Keyword == ETK_None && NNS == 0) && 3807 "ElaboratedType cannot have elaborated type keyword " 3808 "and name qualifier both null."); 3809 } 3810 3811 friend class ASTContext; // ASTContext creates these 3812 3813public: 3814 ~ElaboratedType(); 3815 3816 /// \brief Retrieve the qualification on this type. 3817 NestedNameSpecifier *getQualifier() const { return NNS; } 3818 3819 /// \brief Retrieve the type named by the qualified-id. 3820 QualType getNamedType() const { return NamedType; } 3821 3822 /// \brief Remove a single level of sugar. 3823 QualType desugar() const { return getNamedType(); } 3824 3825 /// \brief Returns whether this type directly provides sugar. 3826 bool isSugared() const { return true; } 3827 3828 void Profile(llvm::FoldingSetNodeID &ID) { 3829 Profile(ID, getKeyword(), NNS, NamedType); 3830 } 3831 3832 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3833 NestedNameSpecifier *NNS, QualType NamedType) { 3834 ID.AddInteger(Keyword); 3835 ID.AddPointer(NNS); 3836 NamedType.Profile(ID); 3837 } 3838 3839 static bool classof(const Type *T) { 3840 return T->getTypeClass() == Elaborated; 3841 } 3842 static bool classof(const ElaboratedType *T) { return true; } 3843}; 3844 3845/// \brief Represents a qualified type name for which the type name is 3846/// dependent. 3847/// 3848/// DependentNameType represents a class of dependent types that involve a 3849/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3850/// name of a type. The DependentNameType may start with a "typename" (for a 3851/// typename-specifier), "class", "struct", "union", or "enum" (for a 3852/// dependent elaborated-type-specifier), or nothing (in contexts where we 3853/// know that we must be referring to a type, e.g., in a base class specifier). 3854class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3855 3856 /// \brief The nested name specifier containing the qualifier. 3857 NestedNameSpecifier *NNS; 3858 3859 /// \brief The type that this typename specifier refers to. 3860 const IdentifierInfo *Name; 3861 3862 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3863 const IdentifierInfo *Name, QualType CanonType) 3864 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3865 /*InstantiationDependent=*/true, 3866 /*VariablyModified=*/false, 3867 NNS->containsUnexpandedParameterPack()), 3868 NNS(NNS), Name(Name) { 3869 assert(NNS->isDependent() && 3870 "DependentNameType requires a dependent nested-name-specifier"); 3871 } 3872 3873 friend class ASTContext; // ASTContext creates these 3874 3875public: 3876 /// \brief Retrieve the qualification on this type. 3877 NestedNameSpecifier *getQualifier() const { return NNS; } 3878 3879 /// \brief Retrieve the type named by the typename specifier as an 3880 /// identifier. 3881 /// 3882 /// This routine will return a non-NULL identifier pointer when the 3883 /// form of the original typename was terminated by an identifier, 3884 /// e.g., "typename T::type". 3885 const IdentifierInfo *getIdentifier() const { 3886 return Name; 3887 } 3888 3889 bool isSugared() const { return false; } 3890 QualType desugar() const { return QualType(this, 0); } 3891 3892 void Profile(llvm::FoldingSetNodeID &ID) { 3893 Profile(ID, getKeyword(), NNS, Name); 3894 } 3895 3896 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3897 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3898 ID.AddInteger(Keyword); 3899 ID.AddPointer(NNS); 3900 ID.AddPointer(Name); 3901 } 3902 3903 static bool classof(const Type *T) { 3904 return T->getTypeClass() == DependentName; 3905 } 3906 static bool classof(const DependentNameType *T) { return true; } 3907}; 3908 3909/// DependentTemplateSpecializationType - Represents a template 3910/// specialization type whose template cannot be resolved, e.g. 3911/// A<T>::template B<T> 3912class DependentTemplateSpecializationType : 3913 public TypeWithKeyword, public llvm::FoldingSetNode { 3914 3915 /// \brief The nested name specifier containing the qualifier. 3916 NestedNameSpecifier *NNS; 3917 3918 /// \brief The identifier of the template. 3919 const IdentifierInfo *Name; 3920 3921 /// \brief - The number of template arguments named in this class 3922 /// template specialization. 3923 unsigned NumArgs; 3924 3925 const TemplateArgument *getArgBuffer() const { 3926 return reinterpret_cast<const TemplateArgument*>(this+1); 3927 } 3928 TemplateArgument *getArgBuffer() { 3929 return reinterpret_cast<TemplateArgument*>(this+1); 3930 } 3931 3932 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3933 NestedNameSpecifier *NNS, 3934 const IdentifierInfo *Name, 3935 unsigned NumArgs, 3936 const TemplateArgument *Args, 3937 QualType Canon); 3938 3939 friend class ASTContext; // ASTContext creates these 3940 3941public: 3942 NestedNameSpecifier *getQualifier() const { return NNS; } 3943 const IdentifierInfo *getIdentifier() const { return Name; } 3944 3945 /// \brief Retrieve the template arguments. 3946 const TemplateArgument *getArgs() const { 3947 return getArgBuffer(); 3948 } 3949 3950 /// \brief Retrieve the number of template arguments. 3951 unsigned getNumArgs() const { return NumArgs; } 3952 3953 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3954 3955 typedef const TemplateArgument * iterator; 3956 iterator begin() const { return getArgs(); } 3957 iterator end() const; // inline in TemplateBase.h 3958 3959 bool isSugared() const { return false; } 3960 QualType desugar() const { return QualType(this, 0); } 3961 3962 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3963 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3964 } 3965 3966 static void Profile(llvm::FoldingSetNodeID &ID, 3967 const ASTContext &Context, 3968 ElaboratedTypeKeyword Keyword, 3969 NestedNameSpecifier *Qualifier, 3970 const IdentifierInfo *Name, 3971 unsigned NumArgs, 3972 const TemplateArgument *Args); 3973 3974 static bool classof(const Type *T) { 3975 return T->getTypeClass() == DependentTemplateSpecialization; 3976 } 3977 static bool classof(const DependentTemplateSpecializationType *T) { 3978 return true; 3979 } 3980}; 3981 3982/// \brief Represents a pack expansion of types. 3983/// 3984/// Pack expansions are part of C++0x variadic templates. A pack 3985/// expansion contains a pattern, which itself contains one or more 3986/// "unexpanded" parameter packs. When instantiated, a pack expansion 3987/// produces a series of types, each instantiated from the pattern of 3988/// the expansion, where the Ith instantiation of the pattern uses the 3989/// Ith arguments bound to each of the unexpanded parameter packs. The 3990/// pack expansion is considered to "expand" these unexpanded 3991/// parameter packs. 3992/// 3993/// \code 3994/// template<typename ...Types> struct tuple; 3995/// 3996/// template<typename ...Types> 3997/// struct tuple_of_references { 3998/// typedef tuple<Types&...> type; 3999/// }; 4000/// \endcode 4001/// 4002/// Here, the pack expansion \c Types&... is represented via a 4003/// PackExpansionType whose pattern is Types&. 4004class PackExpansionType : public Type, public llvm::FoldingSetNode { 4005 /// \brief The pattern of the pack expansion. 4006 QualType Pattern; 4007 4008 /// \brief The number of expansions that this pack expansion will 4009 /// generate when substituted (+1), or indicates that 4010 /// 4011 /// This field will only have a non-zero value when some of the parameter 4012 /// packs that occur within the pattern have been substituted but others have 4013 /// not. 4014 unsigned NumExpansions; 4015 4016 PackExpansionType(QualType Pattern, QualType Canon, 4017 llvm::Optional<unsigned> NumExpansions) 4018 : Type(PackExpansion, Canon, /*Dependent=*/true, 4019 /*InstantiationDependent=*/true, 4020 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4021 /*ContainsUnexpandedParameterPack=*/false), 4022 Pattern(Pattern), 4023 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4024 4025 friend class ASTContext; // ASTContext creates these 4026 4027public: 4028 /// \brief Retrieve the pattern of this pack expansion, which is the 4029 /// type that will be repeatedly instantiated when instantiating the 4030 /// pack expansion itself. 4031 QualType getPattern() const { return Pattern; } 4032 4033 /// \brief Retrieve the number of expansions that this pack expansion will 4034 /// generate, if known. 4035 llvm::Optional<unsigned> getNumExpansions() const { 4036 if (NumExpansions) 4037 return NumExpansions - 1; 4038 4039 return llvm::Optional<unsigned>(); 4040 } 4041 4042 bool isSugared() const { return false; } 4043 QualType desugar() const { return QualType(this, 0); } 4044 4045 void Profile(llvm::FoldingSetNodeID &ID) { 4046 Profile(ID, getPattern(), getNumExpansions()); 4047 } 4048 4049 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4050 llvm::Optional<unsigned> NumExpansions) { 4051 ID.AddPointer(Pattern.getAsOpaquePtr()); 4052 ID.AddBoolean(NumExpansions); 4053 if (NumExpansions) 4054 ID.AddInteger(*NumExpansions); 4055 } 4056 4057 static bool classof(const Type *T) { 4058 return T->getTypeClass() == PackExpansion; 4059 } 4060 static bool classof(const PackExpansionType *T) { 4061 return true; 4062 } 4063}; 4064 4065/// ObjCObjectType - Represents a class type in Objective C. 4066/// Every Objective C type is a combination of a base type and a 4067/// list of protocols. 4068/// 4069/// Given the following declarations: 4070/// @class C; 4071/// @protocol P; 4072/// 4073/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4074/// with base C and no protocols. 4075/// 4076/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4077/// 4078/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4079/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4080/// and no protocols. 4081/// 4082/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4083/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4084/// this should get its own sugar class to better represent the source. 4085class ObjCObjectType : public Type { 4086 // ObjCObjectType.NumProtocols - the number of protocols stored 4087 // after the ObjCObjectPointerType node. 4088 // 4089 // These protocols are those written directly on the type. If 4090 // protocol qualifiers ever become additive, the iterators will need 4091 // to get kindof complicated. 4092 // 4093 // In the canonical object type, these are sorted alphabetically 4094 // and uniqued. 4095 4096 /// Either a BuiltinType or an InterfaceType or sugar for either. 4097 QualType BaseType; 4098 4099 ObjCProtocolDecl * const *getProtocolStorage() const { 4100 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4101 } 4102 4103 ObjCProtocolDecl **getProtocolStorage(); 4104 4105protected: 4106 ObjCObjectType(QualType Canonical, QualType Base, 4107 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4108 4109 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4110 ObjCObjectType(enum Nonce_ObjCInterface) 4111 : Type(ObjCInterface, QualType(), false, false, false, false), 4112 BaseType(QualType(this_(), 0)) { 4113 ObjCObjectTypeBits.NumProtocols = 0; 4114 } 4115 4116public: 4117 /// getBaseType - Gets the base type of this object type. This is 4118 /// always (possibly sugar for) one of: 4119 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4120 /// user, which is a typedef for an ObjCPointerType) 4121 /// - the 'Class' builtin type (same caveat) 4122 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4123 QualType getBaseType() const { return BaseType; } 4124 4125 bool isObjCId() const { 4126 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4127 } 4128 bool isObjCClass() const { 4129 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4130 } 4131 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4132 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4133 bool isObjCUnqualifiedIdOrClass() const { 4134 if (!qual_empty()) return false; 4135 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4136 return T->getKind() == BuiltinType::ObjCId || 4137 T->getKind() == BuiltinType::ObjCClass; 4138 return false; 4139 } 4140 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4141 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4142 4143 /// Gets the interface declaration for this object type, if the base type 4144 /// really is an interface. 4145 ObjCInterfaceDecl *getInterface() const; 4146 4147 typedef ObjCProtocolDecl * const *qual_iterator; 4148 4149 qual_iterator qual_begin() const { return getProtocolStorage(); } 4150 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4151 4152 bool qual_empty() const { return getNumProtocols() == 0; } 4153 4154 /// getNumProtocols - Return the number of qualifying protocols in this 4155 /// interface type, or 0 if there are none. 4156 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4157 4158 /// \brief Fetch a protocol by index. 4159 ObjCProtocolDecl *getProtocol(unsigned I) const { 4160 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4161 return qual_begin()[I]; 4162 } 4163 4164 bool isSugared() const { return false; } 4165 QualType desugar() const { return QualType(this, 0); } 4166 4167 static bool classof(const Type *T) { 4168 return T->getTypeClass() == ObjCObject || 4169 T->getTypeClass() == ObjCInterface; 4170 } 4171 static bool classof(const ObjCObjectType *) { return true; } 4172}; 4173 4174/// ObjCObjectTypeImpl - A class providing a concrete implementation 4175/// of ObjCObjectType, so as to not increase the footprint of 4176/// ObjCInterfaceType. Code outside of ASTContext and the core type 4177/// system should not reference this type. 4178class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4179 friend class ASTContext; 4180 4181 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4182 // will need to be modified. 4183 4184 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4185 ObjCProtocolDecl * const *Protocols, 4186 unsigned NumProtocols) 4187 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4188 4189public: 4190 void Profile(llvm::FoldingSetNodeID &ID); 4191 static void Profile(llvm::FoldingSetNodeID &ID, 4192 QualType Base, 4193 ObjCProtocolDecl *const *protocols, 4194 unsigned NumProtocols); 4195}; 4196 4197inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4198 return reinterpret_cast<ObjCProtocolDecl**>( 4199 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4200} 4201 4202/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4203/// object oriented design. They basically correspond to C++ classes. There 4204/// are two kinds of interface types, normal interfaces like "NSString" and 4205/// qualified interfaces, which are qualified with a protocol list like 4206/// "NSString<NSCopyable, NSAmazing>". 4207/// 4208/// ObjCInterfaceType guarantees the following properties when considered 4209/// as a subtype of its superclass, ObjCObjectType: 4210/// - There are no protocol qualifiers. To reinforce this, code which 4211/// tries to invoke the protocol methods via an ObjCInterfaceType will 4212/// fail to compile. 4213/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4214/// T->getBaseType() == QualType(T, 0). 4215class ObjCInterfaceType : public ObjCObjectType { 4216 mutable ObjCInterfaceDecl *Decl; 4217 4218 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4219 : ObjCObjectType(Nonce_ObjCInterface), 4220 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4221 friend class ASTContext; // ASTContext creates these. 4222 friend class ASTReader; 4223 friend class ObjCInterfaceDecl; 4224 4225public: 4226 /// getDecl - Get the declaration of this interface. 4227 ObjCInterfaceDecl *getDecl() const { return Decl; } 4228 4229 bool isSugared() const { return false; } 4230 QualType desugar() const { return QualType(this, 0); } 4231 4232 static bool classof(const Type *T) { 4233 return T->getTypeClass() == ObjCInterface; 4234 } 4235 static bool classof(const ObjCInterfaceType *) { return true; } 4236 4237 // Nonsense to "hide" certain members of ObjCObjectType within this 4238 // class. People asking for protocols on an ObjCInterfaceType are 4239 // not going to get what they want: ObjCInterfaceTypes are 4240 // guaranteed to have no protocols. 4241 enum { 4242 qual_iterator, 4243 qual_begin, 4244 qual_end, 4245 getNumProtocols, 4246 getProtocol 4247 }; 4248}; 4249 4250inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4251 if (const ObjCInterfaceType *T = 4252 getBaseType()->getAs<ObjCInterfaceType>()) 4253 return T->getDecl(); 4254 return 0; 4255} 4256 4257/// ObjCObjectPointerType - Used to represent a pointer to an 4258/// Objective C object. These are constructed from pointer 4259/// declarators when the pointee type is an ObjCObjectType (or sugar 4260/// for one). In addition, the 'id' and 'Class' types are typedefs 4261/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4262/// are translated into these. 4263/// 4264/// Pointers to pointers to Objective C objects are still PointerTypes; 4265/// only the first level of pointer gets it own type implementation. 4266class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4267 QualType PointeeType; 4268 4269 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4270 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4271 PointeeType(Pointee) {} 4272 friend class ASTContext; // ASTContext creates these. 4273 4274public: 4275 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4276 /// The result will always be an ObjCObjectType or sugar thereof. 4277 QualType getPointeeType() const { return PointeeType; } 4278 4279 /// getObjCObjectType - Gets the type pointed to by this ObjC 4280 /// pointer. This method always returns non-null. 4281 /// 4282 /// This method is equivalent to getPointeeType() except that 4283 /// it discards any typedefs (or other sugar) between this 4284 /// type and the "outermost" object type. So for: 4285 /// @class A; @protocol P; @protocol Q; 4286 /// typedef A<P> AP; 4287 /// typedef A A1; 4288 /// typedef A1<P> A1P; 4289 /// typedef A1P<Q> A1PQ; 4290 /// For 'A*', getObjectType() will return 'A'. 4291 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4292 /// For 'AP*', getObjectType() will return 'A<P>'. 4293 /// For 'A1*', getObjectType() will return 'A'. 4294 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4295 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4296 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4297 /// adding protocols to a protocol-qualified base discards the 4298 /// old qualifiers (for now). But if it didn't, getObjectType() 4299 /// would return 'A1P<Q>' (and we'd have to make iterating over 4300 /// qualifiers more complicated). 4301 const ObjCObjectType *getObjectType() const { 4302 return PointeeType->castAs<ObjCObjectType>(); 4303 } 4304 4305 /// getInterfaceType - If this pointer points to an Objective C 4306 /// @interface type, gets the type for that interface. Any protocol 4307 /// qualifiers on the interface are ignored. 4308 /// 4309 /// \return null if the base type for this pointer is 'id' or 'Class' 4310 const ObjCInterfaceType *getInterfaceType() const { 4311 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4312 } 4313 4314 /// getInterfaceDecl - If this pointer points to an Objective @interface 4315 /// type, gets the declaration for that interface. 4316 /// 4317 /// \return null if the base type for this pointer is 'id' or 'Class' 4318 ObjCInterfaceDecl *getInterfaceDecl() const { 4319 return getObjectType()->getInterface(); 4320 } 4321 4322 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4323 /// its object type is the primitive 'id' type with no protocols. 4324 bool isObjCIdType() const { 4325 return getObjectType()->isObjCUnqualifiedId(); 4326 } 4327 4328 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4329 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4330 bool isObjCClassType() const { 4331 return getObjectType()->isObjCUnqualifiedClass(); 4332 } 4333 4334 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4335 /// non-empty set of protocols. 4336 bool isObjCQualifiedIdType() const { 4337 return getObjectType()->isObjCQualifiedId(); 4338 } 4339 4340 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4341 /// some non-empty set of protocols. 4342 bool isObjCQualifiedClassType() const { 4343 return getObjectType()->isObjCQualifiedClass(); 4344 } 4345 4346 /// An iterator over the qualifiers on the object type. Provided 4347 /// for convenience. This will always iterate over the full set of 4348 /// protocols on a type, not just those provided directly. 4349 typedef ObjCObjectType::qual_iterator qual_iterator; 4350 4351 qual_iterator qual_begin() const { 4352 return getObjectType()->qual_begin(); 4353 } 4354 qual_iterator qual_end() const { 4355 return getObjectType()->qual_end(); 4356 } 4357 bool qual_empty() const { return getObjectType()->qual_empty(); } 4358 4359 /// getNumProtocols - Return the number of qualifying protocols on 4360 /// the object type. 4361 unsigned getNumProtocols() const { 4362 return getObjectType()->getNumProtocols(); 4363 } 4364 4365 /// \brief Retrieve a qualifying protocol by index on the object 4366 /// type. 4367 ObjCProtocolDecl *getProtocol(unsigned I) const { 4368 return getObjectType()->getProtocol(I); 4369 } 4370 4371 bool isSugared() const { return false; } 4372 QualType desugar() const { return QualType(this, 0); } 4373 4374 void Profile(llvm::FoldingSetNodeID &ID) { 4375 Profile(ID, getPointeeType()); 4376 } 4377 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4378 ID.AddPointer(T.getAsOpaquePtr()); 4379 } 4380 static bool classof(const Type *T) { 4381 return T->getTypeClass() == ObjCObjectPointer; 4382 } 4383 static bool classof(const ObjCObjectPointerType *) { return true; } 4384}; 4385 4386class AtomicType : public Type, public llvm::FoldingSetNode { 4387 QualType ValueType; 4388 4389 AtomicType(QualType ValTy, QualType Canonical) 4390 : Type(Atomic, Canonical, ValTy->isDependentType(), 4391 ValTy->isInstantiationDependentType(), 4392 ValTy->isVariablyModifiedType(), 4393 ValTy->containsUnexpandedParameterPack()), 4394 ValueType(ValTy) {} 4395 friend class ASTContext; // ASTContext creates these. 4396 4397 public: 4398 /// getValueType - Gets the type contained by this atomic type, i.e. 4399 /// the type returned by performing an atomic load of this atomic type. 4400 QualType getValueType() const { return ValueType; } 4401 4402 bool isSugared() const { return false; } 4403 QualType desugar() const { return QualType(this, 0); } 4404 4405 void Profile(llvm::FoldingSetNodeID &ID) { 4406 Profile(ID, getValueType()); 4407 } 4408 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4409 ID.AddPointer(T.getAsOpaquePtr()); 4410 } 4411 static bool classof(const Type *T) { 4412 return T->getTypeClass() == Atomic; 4413 } 4414 static bool classof(const AtomicType *) { return true; } 4415}; 4416 4417/// A qualifier set is used to build a set of qualifiers. 4418class QualifierCollector : public Qualifiers { 4419public: 4420 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4421 4422 /// Collect any qualifiers on the given type and return an 4423 /// unqualified type. The qualifiers are assumed to be consistent 4424 /// with those already in the type. 4425 const Type *strip(QualType type) { 4426 addFastQualifiers(type.getLocalFastQualifiers()); 4427 if (!type.hasLocalNonFastQualifiers()) 4428 return type.getTypePtrUnsafe(); 4429 4430 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4431 addConsistentQualifiers(extQuals->getQualifiers()); 4432 return extQuals->getBaseType(); 4433 } 4434 4435 /// Apply the collected qualifiers to the given type. 4436 QualType apply(const ASTContext &Context, QualType QT) const; 4437 4438 /// Apply the collected qualifiers to the given type. 4439 QualType apply(const ASTContext &Context, const Type* T) const; 4440}; 4441 4442 4443// Inline function definitions. 4444 4445inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4446 SplitQualType desugar = 4447 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4448 desugar.Quals.addConsistentQualifiers(Quals); 4449 return desugar; 4450} 4451 4452inline const Type *QualType::getTypePtr() const { 4453 return getCommonPtr()->BaseType; 4454} 4455 4456inline const Type *QualType::getTypePtrOrNull() const { 4457 return (isNull() ? 0 : getCommonPtr()->BaseType); 4458} 4459 4460inline SplitQualType QualType::split() const { 4461 if (!hasLocalNonFastQualifiers()) 4462 return SplitQualType(getTypePtrUnsafe(), 4463 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4464 4465 const ExtQuals *eq = getExtQualsUnsafe(); 4466 Qualifiers qs = eq->getQualifiers(); 4467 qs.addFastQualifiers(getLocalFastQualifiers()); 4468 return SplitQualType(eq->getBaseType(), qs); 4469} 4470 4471inline Qualifiers QualType::getLocalQualifiers() const { 4472 Qualifiers Quals; 4473 if (hasLocalNonFastQualifiers()) 4474 Quals = getExtQualsUnsafe()->getQualifiers(); 4475 Quals.addFastQualifiers(getLocalFastQualifiers()); 4476 return Quals; 4477} 4478 4479inline Qualifiers QualType::getQualifiers() const { 4480 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4481 quals.addFastQualifiers(getLocalFastQualifiers()); 4482 return quals; 4483} 4484 4485inline unsigned QualType::getCVRQualifiers() const { 4486 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4487 cvr |= getLocalCVRQualifiers(); 4488 return cvr; 4489} 4490 4491inline QualType QualType::getCanonicalType() const { 4492 QualType canon = getCommonPtr()->CanonicalType; 4493 return canon.withFastQualifiers(getLocalFastQualifiers()); 4494} 4495 4496inline bool QualType::isCanonical() const { 4497 return getTypePtr()->isCanonicalUnqualified(); 4498} 4499 4500inline bool QualType::isCanonicalAsParam() const { 4501 if (!isCanonical()) return false; 4502 if (hasLocalQualifiers()) return false; 4503 4504 const Type *T = getTypePtr(); 4505 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4506 return false; 4507 4508 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4509} 4510 4511inline bool QualType::isConstQualified() const { 4512 return isLocalConstQualified() || 4513 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4514} 4515 4516inline bool QualType::isRestrictQualified() const { 4517 return isLocalRestrictQualified() || 4518 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4519} 4520 4521 4522inline bool QualType::isVolatileQualified() const { 4523 return isLocalVolatileQualified() || 4524 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4525} 4526 4527inline bool QualType::hasQualifiers() const { 4528 return hasLocalQualifiers() || 4529 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4530} 4531 4532inline QualType QualType::getUnqualifiedType() const { 4533 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4534 return QualType(getTypePtr(), 0); 4535 4536 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4537} 4538 4539inline SplitQualType QualType::getSplitUnqualifiedType() const { 4540 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4541 return split(); 4542 4543 return getSplitUnqualifiedTypeImpl(*this); 4544} 4545 4546inline void QualType::removeLocalConst() { 4547 removeLocalFastQualifiers(Qualifiers::Const); 4548} 4549 4550inline void QualType::removeLocalRestrict() { 4551 removeLocalFastQualifiers(Qualifiers::Restrict); 4552} 4553 4554inline void QualType::removeLocalVolatile() { 4555 removeLocalFastQualifiers(Qualifiers::Volatile); 4556} 4557 4558inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4559 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4560 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4561 4562 // Fast path: we don't need to touch the slow qualifiers. 4563 removeLocalFastQualifiers(Mask); 4564} 4565 4566/// getAddressSpace - Return the address space of this type. 4567inline unsigned QualType::getAddressSpace() const { 4568 return getQualifiers().getAddressSpace(); 4569} 4570 4571/// getObjCGCAttr - Return the gc attribute of this type. 4572inline Qualifiers::GC QualType::getObjCGCAttr() const { 4573 return getQualifiers().getObjCGCAttr(); 4574} 4575 4576inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4577 if (const PointerType *PT = t.getAs<PointerType>()) { 4578 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4579 return FT->getExtInfo(); 4580 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4581 return FT->getExtInfo(); 4582 4583 return FunctionType::ExtInfo(); 4584} 4585 4586inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4587 return getFunctionExtInfo(*t); 4588} 4589 4590/// isMoreQualifiedThan - Determine whether this type is more 4591/// qualified than the Other type. For example, "const volatile int" 4592/// is more qualified than "const int", "volatile int", and 4593/// "int". However, it is not more qualified than "const volatile 4594/// int". 4595inline bool QualType::isMoreQualifiedThan(QualType other) const { 4596 Qualifiers myQuals = getQualifiers(); 4597 Qualifiers otherQuals = other.getQualifiers(); 4598 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4599} 4600 4601/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4602/// as qualified as the Other type. For example, "const volatile 4603/// int" is at least as qualified as "const int", "volatile int", 4604/// "int", and "const volatile int". 4605inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4606 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4607} 4608 4609/// getNonReferenceType - If Type is a reference type (e.g., const 4610/// int&), returns the type that the reference refers to ("const 4611/// int"). Otherwise, returns the type itself. This routine is used 4612/// throughout Sema to implement C++ 5p6: 4613/// 4614/// If an expression initially has the type "reference to T" (8.3.2, 4615/// 8.5.3), the type is adjusted to "T" prior to any further 4616/// analysis, the expression designates the object or function 4617/// denoted by the reference, and the expression is an lvalue. 4618inline QualType QualType::getNonReferenceType() const { 4619 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4620 return RefType->getPointeeType(); 4621 else 4622 return *this; 4623} 4624 4625inline bool QualType::isCForbiddenLValueType() const { 4626 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4627 getTypePtr()->isFunctionType()); 4628} 4629 4630/// \brief Tests whether the type is categorized as a fundamental type. 4631/// 4632/// \returns True for types specified in C++0x [basic.fundamental]. 4633inline bool Type::isFundamentalType() const { 4634 return isVoidType() || 4635 // FIXME: It's really annoying that we don't have an 4636 // 'isArithmeticType()' which agrees with the standard definition. 4637 (isArithmeticType() && !isEnumeralType()); 4638} 4639 4640/// \brief Tests whether the type is categorized as a compound type. 4641/// 4642/// \returns True for types specified in C++0x [basic.compound]. 4643inline bool Type::isCompoundType() const { 4644 // C++0x [basic.compound]p1: 4645 // Compound types can be constructed in the following ways: 4646 // -- arrays of objects of a given type [...]; 4647 return isArrayType() || 4648 // -- functions, which have parameters of given types [...]; 4649 isFunctionType() || 4650 // -- pointers to void or objects or functions [...]; 4651 isPointerType() || 4652 // -- references to objects or functions of a given type. [...] 4653 isReferenceType() || 4654 // -- classes containing a sequence of objects of various types, [...]; 4655 isRecordType() || 4656 // -- unions, which are classes capable of containing objects of different 4657 // types at different times; 4658 isUnionType() || 4659 // -- enumerations, which comprise a set of named constant values. [...]; 4660 isEnumeralType() || 4661 // -- pointers to non-static class members, [...]. 4662 isMemberPointerType(); 4663} 4664 4665inline bool Type::isFunctionType() const { 4666 return isa<FunctionType>(CanonicalType); 4667} 4668inline bool Type::isPointerType() const { 4669 return isa<PointerType>(CanonicalType); 4670} 4671inline bool Type::isAnyPointerType() const { 4672 return isPointerType() || isObjCObjectPointerType(); 4673} 4674inline bool Type::isBlockPointerType() const { 4675 return isa<BlockPointerType>(CanonicalType); 4676} 4677inline bool Type::isReferenceType() const { 4678 return isa<ReferenceType>(CanonicalType); 4679} 4680inline bool Type::isLValueReferenceType() const { 4681 return isa<LValueReferenceType>(CanonicalType); 4682} 4683inline bool Type::isRValueReferenceType() const { 4684 return isa<RValueReferenceType>(CanonicalType); 4685} 4686inline bool Type::isFunctionPointerType() const { 4687 if (const PointerType *T = getAs<PointerType>()) 4688 return T->getPointeeType()->isFunctionType(); 4689 else 4690 return false; 4691} 4692inline bool Type::isMemberPointerType() const { 4693 return isa<MemberPointerType>(CanonicalType); 4694} 4695inline bool Type::isMemberFunctionPointerType() const { 4696 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4697 return T->isMemberFunctionPointer(); 4698 else 4699 return false; 4700} 4701inline bool Type::isMemberDataPointerType() const { 4702 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4703 return T->isMemberDataPointer(); 4704 else 4705 return false; 4706} 4707inline bool Type::isArrayType() const { 4708 return isa<ArrayType>(CanonicalType); 4709} 4710inline bool Type::isConstantArrayType() const { 4711 return isa<ConstantArrayType>(CanonicalType); 4712} 4713inline bool Type::isIncompleteArrayType() const { 4714 return isa<IncompleteArrayType>(CanonicalType); 4715} 4716inline bool Type::isVariableArrayType() const { 4717 return isa<VariableArrayType>(CanonicalType); 4718} 4719inline bool Type::isDependentSizedArrayType() const { 4720 return isa<DependentSizedArrayType>(CanonicalType); 4721} 4722inline bool Type::isBuiltinType() const { 4723 return isa<BuiltinType>(CanonicalType); 4724} 4725inline bool Type::isRecordType() const { 4726 return isa<RecordType>(CanonicalType); 4727} 4728inline bool Type::isEnumeralType() const { 4729 return isa<EnumType>(CanonicalType); 4730} 4731inline bool Type::isAnyComplexType() const { 4732 return isa<ComplexType>(CanonicalType); 4733} 4734inline bool Type::isVectorType() const { 4735 return isa<VectorType>(CanonicalType); 4736} 4737inline bool Type::isExtVectorType() const { 4738 return isa<ExtVectorType>(CanonicalType); 4739} 4740inline bool Type::isObjCObjectPointerType() const { 4741 return isa<ObjCObjectPointerType>(CanonicalType); 4742} 4743inline bool Type::isObjCObjectType() const { 4744 return isa<ObjCObjectType>(CanonicalType); 4745} 4746inline bool Type::isObjCObjectOrInterfaceType() const { 4747 return isa<ObjCInterfaceType>(CanonicalType) || 4748 isa<ObjCObjectType>(CanonicalType); 4749} 4750inline bool Type::isAtomicType() const { 4751 return isa<AtomicType>(CanonicalType); 4752} 4753 4754inline bool Type::isObjCQualifiedIdType() const { 4755 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4756 return OPT->isObjCQualifiedIdType(); 4757 return false; 4758} 4759inline bool Type::isObjCQualifiedClassType() const { 4760 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4761 return OPT->isObjCQualifiedClassType(); 4762 return false; 4763} 4764inline bool Type::isObjCIdType() const { 4765 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4766 return OPT->isObjCIdType(); 4767 return false; 4768} 4769inline bool Type::isObjCClassType() const { 4770 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4771 return OPT->isObjCClassType(); 4772 return false; 4773} 4774inline bool Type::isObjCSelType() const { 4775 if (const PointerType *OPT = getAs<PointerType>()) 4776 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4777 return false; 4778} 4779inline bool Type::isObjCBuiltinType() const { 4780 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4781} 4782inline bool Type::isTemplateTypeParmType() const { 4783 return isa<TemplateTypeParmType>(CanonicalType); 4784} 4785 4786inline bool Type::isSpecificBuiltinType(unsigned K) const { 4787 if (const BuiltinType *BT = getAs<BuiltinType>()) 4788 if (BT->getKind() == (BuiltinType::Kind) K) 4789 return true; 4790 return false; 4791} 4792 4793inline bool Type::isPlaceholderType() const { 4794 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4795 return BT->isPlaceholderType(); 4796 return false; 4797} 4798 4799inline const BuiltinType *Type::getAsPlaceholderType() const { 4800 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4801 if (BT->isPlaceholderType()) 4802 return BT; 4803 return 0; 4804} 4805 4806inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4807 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4808 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4809 return (BT->getKind() == (BuiltinType::Kind) K); 4810 return false; 4811} 4812 4813inline bool Type::isNonOverloadPlaceholderType() const { 4814 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4815 return BT->isNonOverloadPlaceholderType(); 4816 return false; 4817} 4818 4819/// \brief Determines whether this is a type for which one can define 4820/// an overloaded operator. 4821inline bool Type::isOverloadableType() const { 4822 return isDependentType() || isRecordType() || isEnumeralType(); 4823} 4824 4825/// \brief Determines whether this type can decay to a pointer type. 4826inline bool Type::canDecayToPointerType() const { 4827 return isFunctionType() || isArrayType(); 4828} 4829 4830inline bool Type::hasPointerRepresentation() const { 4831 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4832 isObjCObjectPointerType() || isNullPtrType()); 4833} 4834 4835inline bool Type::hasObjCPointerRepresentation() const { 4836 return isObjCObjectPointerType(); 4837} 4838 4839inline const Type *Type::getBaseElementTypeUnsafe() const { 4840 const Type *type = this; 4841 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4842 type = arrayType->getElementType().getTypePtr(); 4843 return type; 4844} 4845 4846/// Insertion operator for diagnostics. This allows sending QualType's into a 4847/// diagnostic with <<. 4848inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4849 QualType T) { 4850 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4851 DiagnosticsEngine::ak_qualtype); 4852 return DB; 4853} 4854 4855/// Insertion operator for partial diagnostics. This allows sending QualType's 4856/// into a diagnostic with <<. 4857inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4858 QualType T) { 4859 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4860 DiagnosticsEngine::ak_qualtype); 4861 return PD; 4862} 4863 4864// Helper class template that is used by Type::getAs to ensure that one does 4865// not try to look through a qualified type to get to an array type. 4866template<typename T, 4867 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4868 llvm::is_base_of<ArrayType, T>::value)> 4869struct ArrayType_cannot_be_used_with_getAs { }; 4870 4871template<typename T> 4872struct ArrayType_cannot_be_used_with_getAs<T, true>; 4873 4874/// Member-template getAs<specific type>'. 4875template <typename T> const T *Type::getAs() const { 4876 ArrayType_cannot_be_used_with_getAs<T> at; 4877 (void)at; 4878 4879 // If this is directly a T type, return it. 4880 if (const T *Ty = dyn_cast<T>(this)) 4881 return Ty; 4882 4883 // If the canonical form of this type isn't the right kind, reject it. 4884 if (!isa<T>(CanonicalType)) 4885 return 0; 4886 4887 // If this is a typedef for the type, strip the typedef off without 4888 // losing all typedef information. 4889 return cast<T>(getUnqualifiedDesugaredType()); 4890} 4891 4892inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4893 // If this is directly an array type, return it. 4894 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4895 return arr; 4896 4897 // If the canonical form of this type isn't the right kind, reject it. 4898 if (!isa<ArrayType>(CanonicalType)) 4899 return 0; 4900 4901 // If this is a typedef for the type, strip the typedef off without 4902 // losing all typedef information. 4903 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4904} 4905 4906template <typename T> const T *Type::castAs() const { 4907 ArrayType_cannot_be_used_with_getAs<T> at; 4908 (void) at; 4909 4910 assert(isa<T>(CanonicalType)); 4911 if (const T *ty = dyn_cast<T>(this)) return ty; 4912 return cast<T>(getUnqualifiedDesugaredType()); 4913} 4914 4915inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4916 assert(isa<ArrayType>(CanonicalType)); 4917 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4918 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4919} 4920 4921} // end namespace clang 4922 4923#endif 4924