Type.h revision 759abb4d9ec14ae32104a9677b60f0542b60d1d8
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/Casting.h" 26#include "llvm/Support/type_traits.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 33using llvm::isa; 34using llvm::cast; 35using llvm::cast_or_null; 36using llvm::dyn_cast; 37using llvm::dyn_cast_or_null; 38namespace clang { 39 enum { 40 TypeAlignmentInBits = 4, 41 TypeAlignment = 1 << TypeAlignmentInBits 42 }; 43 class Type; 44 class ExtQuals; 45 class QualType; 46} 47 48namespace llvm { 49 template <typename T> 50 class PointerLikeTypeTraits; 51 template<> 52 class PointerLikeTypeTraits< ::clang::Type*> { 53 public: 54 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 55 static inline ::clang::Type *getFromVoidPointer(void *P) { 56 return static_cast< ::clang::Type*>(P); 57 } 58 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 59 }; 60 template<> 61 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 62 public: 63 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 64 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 65 return static_cast< ::clang::ExtQuals*>(P); 66 } 67 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 68 }; 69 70 template <> 71 struct isPodLike<clang::QualType> { static const bool value = true; }; 72} 73 74namespace clang { 75 class ASTContext; 76 class TypedefDecl; 77 class TemplateDecl; 78 class TemplateTypeParmDecl; 79 class NonTypeTemplateParmDecl; 80 class TemplateTemplateParmDecl; 81 class TagDecl; 82 class RecordDecl; 83 class CXXRecordDecl; 84 class EnumDecl; 85 class FieldDecl; 86 class ObjCInterfaceDecl; 87 class ObjCProtocolDecl; 88 class ObjCMethodDecl; 89 class UnresolvedUsingTypenameDecl; 90 class Expr; 91 class Stmt; 92 class SourceLocation; 93 class StmtIteratorBase; 94 class TemplateArgument; 95 class TemplateArgumentLoc; 96 class TemplateArgumentListInfo; 97 class ElaboratedType; 98 class ExtQuals; 99 class ExtQualsTypeCommonBase; 100 struct PrintingPolicy; 101 102 template <typename> class CanQual; 103 typedef CanQual<Type> CanQualType; 104 105 // Provide forward declarations for all of the *Type classes 106#define TYPE(Class, Base) class Class##Type; 107#include "clang/AST/TypeNodes.def" 108 109/// Qualifiers - The collection of all-type qualifiers we support. 110/// Clang supports five independent qualifiers: 111/// * C99: const, volatile, and restrict 112/// * Embedded C (TR18037): address spaces 113/// * Objective C: the GC attributes (none, weak, or strong) 114class Qualifiers { 115public: 116 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 117 Const = 0x1, 118 Restrict = 0x2, 119 Volatile = 0x4, 120 CVRMask = Const | Volatile | Restrict 121 }; 122 123 enum GC { 124 GCNone = 0, 125 Weak, 126 Strong 127 }; 128 129 enum { 130 /// The maximum supported address space number. 131 /// 24 bits should be enough for anyone. 132 MaxAddressSpace = 0xffffffu, 133 134 /// The width of the "fast" qualifier mask. 135 FastWidth = 3, 136 137 /// The fast qualifier mask. 138 FastMask = (1 << FastWidth) - 1 139 }; 140 141 Qualifiers() : Mask(0) {} 142 143 static Qualifiers fromFastMask(unsigned Mask) { 144 Qualifiers Qs; 145 Qs.addFastQualifiers(Mask); 146 return Qs; 147 } 148 149 static Qualifiers fromCVRMask(unsigned CVR) { 150 Qualifiers Qs; 151 Qs.addCVRQualifiers(CVR); 152 return Qs; 153 } 154 155 // Deserialize qualifiers from an opaque representation. 156 static Qualifiers fromOpaqueValue(unsigned opaque) { 157 Qualifiers Qs; 158 Qs.Mask = opaque; 159 return Qs; 160 } 161 162 // Serialize these qualifiers into an opaque representation. 163 unsigned getAsOpaqueValue() const { 164 return Mask; 165 } 166 167 bool hasConst() const { return Mask & Const; } 168 void setConst(bool flag) { 169 Mask = (Mask & ~Const) | (flag ? Const : 0); 170 } 171 void removeConst() { Mask &= ~Const; } 172 void addConst() { Mask |= Const; } 173 174 bool hasVolatile() const { return Mask & Volatile; } 175 void setVolatile(bool flag) { 176 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 177 } 178 void removeVolatile() { Mask &= ~Volatile; } 179 void addVolatile() { Mask |= Volatile; } 180 181 bool hasRestrict() const { return Mask & Restrict; } 182 void setRestrict(bool flag) { 183 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 184 } 185 void removeRestrict() { Mask &= ~Restrict; } 186 void addRestrict() { Mask |= Restrict; } 187 188 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 189 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 190 void setCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask = (Mask & ~CVRMask) | mask; 193 } 194 void removeCVRQualifiers(unsigned mask) { 195 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 196 Mask &= ~mask; 197 } 198 void removeCVRQualifiers() { 199 removeCVRQualifiers(CVRMask); 200 } 201 void addCVRQualifiers(unsigned mask) { 202 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 203 Mask |= mask; 204 } 205 206 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 207 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 208 void setObjCGCAttr(GC type) { 209 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 210 } 211 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 212 void addObjCGCAttr(GC type) { 213 assert(type); 214 setObjCGCAttr(type); 215 } 216 Qualifiers withoutObjCGCAttr() const { 217 Qualifiers qs = *this; 218 qs.removeObjCGCAttr(); 219 return qs; 220 } 221 222 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 223 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 224 void setAddressSpace(unsigned space) { 225 assert(space <= MaxAddressSpace); 226 Mask = (Mask & ~AddressSpaceMask) 227 | (((uint32_t) space) << AddressSpaceShift); 228 } 229 void removeAddressSpace() { setAddressSpace(0); } 230 void addAddressSpace(unsigned space) { 231 assert(space); 232 setAddressSpace(space); 233 } 234 235 // Fast qualifiers are those that can be allocated directly 236 // on a QualType object. 237 bool hasFastQualifiers() const { return getFastQualifiers(); } 238 unsigned getFastQualifiers() const { return Mask & FastMask; } 239 void setFastQualifiers(unsigned mask) { 240 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 241 Mask = (Mask & ~FastMask) | mask; 242 } 243 void removeFastQualifiers(unsigned mask) { 244 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 245 Mask &= ~mask; 246 } 247 void removeFastQualifiers() { 248 removeFastQualifiers(FastMask); 249 } 250 void addFastQualifiers(unsigned mask) { 251 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 252 Mask |= mask; 253 } 254 255 /// hasNonFastQualifiers - Return true if the set contains any 256 /// qualifiers which require an ExtQuals node to be allocated. 257 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 258 Qualifiers getNonFastQualifiers() const { 259 Qualifiers Quals = *this; 260 Quals.setFastQualifiers(0); 261 return Quals; 262 } 263 264 /// hasQualifiers - Return true if the set contains any qualifiers. 265 bool hasQualifiers() const { return Mask; } 266 bool empty() const { return !Mask; } 267 268 /// \brief Add the qualifiers from the given set to this set. 269 void addQualifiers(Qualifiers Q) { 270 // If the other set doesn't have any non-boolean qualifiers, just 271 // bit-or it in. 272 if (!(Q.Mask & ~CVRMask)) 273 Mask |= Q.Mask; 274 else { 275 Mask |= (Q.Mask & CVRMask); 276 if (Q.hasAddressSpace()) 277 addAddressSpace(Q.getAddressSpace()); 278 if (Q.hasObjCGCAttr()) 279 addObjCGCAttr(Q.getObjCGCAttr()); 280 } 281 } 282 283 /// \brief Add the qualifiers from the given set to this set, given that 284 /// they don't conflict. 285 void addConsistentQualifiers(Qualifiers qs) { 286 assert(getAddressSpace() == qs.getAddressSpace() || 287 !hasAddressSpace() || !qs.hasAddressSpace()); 288 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 289 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 290 Mask |= qs.Mask; 291 } 292 293 /// \brief Determines if these qualifiers compatibly include another set. 294 /// Generally this answers the question of whether an object with the other 295 /// qualifiers can be safely used as an object with these qualifiers. 296 bool compatiblyIncludes(Qualifiers other) const { 297 // Non-CVR qualifiers must match exactly. CVR qualifiers may subset. 298 return ((Mask & ~CVRMask) == (other.Mask & ~CVRMask)) && 299 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 300 } 301 302 bool isSupersetOf(Qualifiers Other) const; 303 304 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 305 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 306 307 operator bool() const { return hasQualifiers(); } 308 309 Qualifiers &operator+=(Qualifiers R) { 310 addQualifiers(R); 311 return *this; 312 } 313 314 // Union two qualifier sets. If an enumerated qualifier appears 315 // in both sets, use the one from the right. 316 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 317 L += R; 318 return L; 319 } 320 321 Qualifiers &operator-=(Qualifiers R) { 322 Mask = Mask & ~(R.Mask); 323 return *this; 324 } 325 326 /// \brief Compute the difference between two qualifier sets. 327 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 328 L -= R; 329 return L; 330 } 331 332 std::string getAsString() const; 333 std::string getAsString(const PrintingPolicy &Policy) const { 334 std::string Buffer; 335 getAsStringInternal(Buffer, Policy); 336 return Buffer; 337 } 338 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 339 340 void Profile(llvm::FoldingSetNodeID &ID) const { 341 ID.AddInteger(Mask); 342 } 343 344private: 345 346 // bits: |0 1 2|3 .. 4|5 .. 31| 347 // |C R V|GCAttr|AddrSpace| 348 uint32_t Mask; 349 350 static const uint32_t GCAttrMask = 0x18; 351 static const uint32_t GCAttrShift = 3; 352 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 353 static const uint32_t AddressSpaceShift = 5; 354}; 355 356/// CallingConv - Specifies the calling convention that a function uses. 357enum CallingConv { 358 CC_Default, 359 CC_C, // __attribute__((cdecl)) 360 CC_X86StdCall, // __attribute__((stdcall)) 361 CC_X86FastCall, // __attribute__((fastcall)) 362 CC_X86ThisCall, // __attribute__((thiscall)) 363 CC_X86Pascal // __attribute__((pascal)) 364}; 365 366typedef std::pair<const Type*, Qualifiers> SplitQualType; 367 368/// QualType - For efficiency, we don't store CV-qualified types as nodes on 369/// their own: instead each reference to a type stores the qualifiers. This 370/// greatly reduces the number of nodes we need to allocate for types (for 371/// example we only need one for 'int', 'const int', 'volatile int', 372/// 'const volatile int', etc). 373/// 374/// As an added efficiency bonus, instead of making this a pair, we 375/// just store the two bits we care about in the low bits of the 376/// pointer. To handle the packing/unpacking, we make QualType be a 377/// simple wrapper class that acts like a smart pointer. A third bit 378/// indicates whether there are extended qualifiers present, in which 379/// case the pointer points to a special structure. 380class QualType { 381 // Thankfully, these are efficiently composable. 382 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 383 Qualifiers::FastWidth> Value; 384 385 const ExtQuals *getExtQualsUnsafe() const { 386 return Value.getPointer().get<const ExtQuals*>(); 387 } 388 389 const Type *getTypePtrUnsafe() const { 390 return Value.getPointer().get<const Type*>(); 391 } 392 393 const ExtQualsTypeCommonBase *getCommonPtr() const { 394 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 395 uintptr_t CommonPtrVal 396 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 397 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 398 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 399 } 400 401 friend class QualifierCollector; 402public: 403 QualType() {} 404 405 QualType(const Type *Ptr, unsigned Quals) 406 : Value(Ptr, Quals) {} 407 QualType(const ExtQuals *Ptr, unsigned Quals) 408 : Value(Ptr, Quals) {} 409 410 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 411 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 412 413 /// Retrieves a pointer to the underlying (unqualified) type. 414 /// This should really return a const Type, but it's not worth 415 /// changing all the users right now. 416 /// 417 /// This function requires that the type not be NULL. If the type might be 418 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 419 const Type *getTypePtr() const; 420 421 const Type *getTypePtrOrNull() const; 422 423 /// Divides a QualType into its unqualified type and a set of local 424 /// qualifiers. 425 SplitQualType split() const; 426 427 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 428 static QualType getFromOpaquePtr(const void *Ptr) { 429 QualType T; 430 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 431 return T; 432 } 433 434 const Type &operator*() const { 435 return *getTypePtr(); 436 } 437 438 const Type *operator->() const { 439 return getTypePtr(); 440 } 441 442 bool isCanonical() const; 443 bool isCanonicalAsParam() const; 444 445 /// isNull - Return true if this QualType doesn't point to a type yet. 446 bool isNull() const { 447 return Value.getPointer().isNull(); 448 } 449 450 /// \brief Determine whether this particular QualType instance has the 451 /// "const" qualifier set, without looking through typedefs that may have 452 /// added "const" at a different level. 453 bool isLocalConstQualified() const { 454 return (getLocalFastQualifiers() & Qualifiers::Const); 455 } 456 457 /// \brief Determine whether this type is const-qualified. 458 bool isConstQualified() const; 459 460 /// \brief Determine whether this particular QualType instance has the 461 /// "restrict" qualifier set, without looking through typedefs that may have 462 /// added "restrict" at a different level. 463 bool isLocalRestrictQualified() const { 464 return (getLocalFastQualifiers() & Qualifiers::Restrict); 465 } 466 467 /// \brief Determine whether this type is restrict-qualified. 468 bool isRestrictQualified() const; 469 470 /// \brief Determine whether this particular QualType instance has the 471 /// "volatile" qualifier set, without looking through typedefs that may have 472 /// added "volatile" at a different level. 473 bool isLocalVolatileQualified() const { 474 return (getLocalFastQualifiers() & Qualifiers::Volatile); 475 } 476 477 /// \brief Determine whether this type is volatile-qualified. 478 bool isVolatileQualified() const; 479 480 /// \brief Determine whether this particular QualType instance has any 481 /// qualifiers, without looking through any typedefs that might add 482 /// qualifiers at a different level. 483 bool hasLocalQualifiers() const { 484 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 485 } 486 487 /// \brief Determine whether this type has any qualifiers. 488 bool hasQualifiers() const; 489 490 /// \brief Determine whether this particular QualType instance has any 491 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 492 /// instance. 493 bool hasLocalNonFastQualifiers() const { 494 return Value.getPointer().is<const ExtQuals*>(); 495 } 496 497 /// \brief Retrieve the set of qualifiers local to this particular QualType 498 /// instance, not including any qualifiers acquired through typedefs or 499 /// other sugar. 500 Qualifiers getLocalQualifiers() const; 501 502 /// \brief Retrieve the set of qualifiers applied to this type. 503 Qualifiers getQualifiers() const; 504 505 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 506 /// local to this particular QualType instance, not including any qualifiers 507 /// acquired through typedefs or other sugar. 508 unsigned getLocalCVRQualifiers() const { 509 return getLocalFastQualifiers(); 510 } 511 512 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 513 /// applied to this type. 514 unsigned getCVRQualifiers() const; 515 516 bool isConstant(ASTContext& Ctx) const { 517 return QualType::isConstant(*this, Ctx); 518 } 519 520 // Don't promise in the API that anything besides 'const' can be 521 // easily added. 522 523 /// addConst - add the specified type qualifier to this QualType. 524 void addConst() { 525 addFastQualifiers(Qualifiers::Const); 526 } 527 QualType withConst() const { 528 return withFastQualifiers(Qualifiers::Const); 529 } 530 531 void addFastQualifiers(unsigned TQs) { 532 assert(!(TQs & ~Qualifiers::FastMask) 533 && "non-fast qualifier bits set in mask!"); 534 Value.setInt(Value.getInt() | TQs); 535 } 536 537 void removeLocalConst(); 538 void removeLocalVolatile(); 539 void removeLocalRestrict(); 540 void removeLocalCVRQualifiers(unsigned Mask); 541 542 void removeLocalFastQualifiers() { Value.setInt(0); } 543 void removeLocalFastQualifiers(unsigned Mask) { 544 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 545 Value.setInt(Value.getInt() & ~Mask); 546 } 547 548 // Creates a type with the given qualifiers in addition to any 549 // qualifiers already on this type. 550 QualType withFastQualifiers(unsigned TQs) const { 551 QualType T = *this; 552 T.addFastQualifiers(TQs); 553 return T; 554 } 555 556 // Creates a type with exactly the given fast qualifiers, removing 557 // any existing fast qualifiers. 558 QualType withExactLocalFastQualifiers(unsigned TQs) const { 559 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 560 } 561 562 // Removes fast qualifiers, but leaves any extended qualifiers in place. 563 QualType withoutLocalFastQualifiers() const { 564 QualType T = *this; 565 T.removeLocalFastQualifiers(); 566 return T; 567 } 568 569 QualType getCanonicalType() const; 570 571 /// \brief Return this type with all of the instance-specific qualifiers 572 /// removed, but without removing any qualifiers that may have been applied 573 /// through typedefs. 574 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 575 576 /// \brief Retrieve the unqualified variant of the given type, 577 /// removing as little sugar as possible. 578 /// 579 /// This routine looks through various kinds of sugar to find the 580 /// least-desugared type that is unqualified. For example, given: 581 /// 582 /// \code 583 /// typedef int Integer; 584 /// typedef const Integer CInteger; 585 /// typedef CInteger DifferenceType; 586 /// \endcode 587 /// 588 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 589 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 590 /// 591 /// The resulting type might still be qualified if it's an array 592 /// type. To strip qualifiers even from within an array type, use 593 /// ASTContext::getUnqualifiedArrayType. 594 inline QualType getUnqualifiedType() const; 595 596 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 597 /// given type, removing as little sugar as possible. 598 /// 599 /// Like getUnqualifiedType(), but also returns the set of 600 /// qualifiers that were built up. 601 /// 602 /// The resulting type might still be qualified if it's an array 603 /// type. To strip qualifiers even from within an array type, use 604 /// ASTContext::getUnqualifiedArrayType. 605 inline SplitQualType getSplitUnqualifiedType() const; 606 607 bool isMoreQualifiedThan(QualType Other) const; 608 bool isAtLeastAsQualifiedAs(QualType Other) const; 609 QualType getNonReferenceType() const; 610 611 /// \brief Determine the type of a (typically non-lvalue) expression with the 612 /// specified result type. 613 /// 614 /// This routine should be used for expressions for which the return type is 615 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 616 /// an lvalue. It removes a top-level reference (since there are no 617 /// expressions of reference type) and deletes top-level cvr-qualifiers 618 /// from non-class types (in C++) or all types (in C). 619 QualType getNonLValueExprType(ASTContext &Context) const; 620 621 /// getDesugaredType - Return the specified type with any "sugar" removed from 622 /// the type. This takes off typedefs, typeof's etc. If the outer level of 623 /// the type is already concrete, it returns it unmodified. This is similar 624 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 625 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 626 /// concrete. 627 /// 628 /// Qualifiers are left in place. 629 QualType getDesugaredType(const ASTContext &Context) const { 630 return getDesugaredType(*this, Context); 631 } 632 633 SplitQualType getSplitDesugaredType() const { 634 return getSplitDesugaredType(*this); 635 } 636 637 /// IgnoreParens - Returns the specified type after dropping any 638 /// outer-level parentheses. 639 QualType IgnoreParens() const { 640 if (isa<ParenType>(*this)) 641 return QualType::IgnoreParens(*this); 642 return *this; 643 } 644 645 /// operator==/!= - Indicate whether the specified types and qualifiers are 646 /// identical. 647 friend bool operator==(const QualType &LHS, const QualType &RHS) { 648 return LHS.Value == RHS.Value; 649 } 650 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 651 return LHS.Value != RHS.Value; 652 } 653 std::string getAsString() const { 654 return getAsString(split()); 655 } 656 static std::string getAsString(SplitQualType split) { 657 return getAsString(split.first, split.second); 658 } 659 static std::string getAsString(const Type *ty, Qualifiers qs); 660 661 std::string getAsString(const PrintingPolicy &Policy) const { 662 std::string S; 663 getAsStringInternal(S, Policy); 664 return S; 665 } 666 void getAsStringInternal(std::string &Str, 667 const PrintingPolicy &Policy) const { 668 return getAsStringInternal(split(), Str, Policy); 669 } 670 static void getAsStringInternal(SplitQualType split, std::string &out, 671 const PrintingPolicy &policy) { 672 return getAsStringInternal(split.first, split.second, out, policy); 673 } 674 static void getAsStringInternal(const Type *ty, Qualifiers qs, 675 std::string &out, 676 const PrintingPolicy &policy); 677 678 void dump(const char *s) const; 679 void dump() const; 680 681 void Profile(llvm::FoldingSetNodeID &ID) const { 682 ID.AddPointer(getAsOpaquePtr()); 683 } 684 685 /// getAddressSpace - Return the address space of this type. 686 inline unsigned getAddressSpace() const; 687 688 /// GCAttrTypesAttr - Returns gc attribute of this type. 689 inline Qualifiers::GC getObjCGCAttr() const; 690 691 /// isObjCGCWeak true when Type is objc's weak. 692 bool isObjCGCWeak() const { 693 return getObjCGCAttr() == Qualifiers::Weak; 694 } 695 696 /// isObjCGCStrong true when Type is objc's strong. 697 bool isObjCGCStrong() const { 698 return getObjCGCAttr() == Qualifiers::Strong; 699 } 700 701 enum DestructionKind { 702 DK_none, 703 DK_cxx_destructor 704 }; 705 706 /// isDestructedType - nonzero if objects of this type require 707 /// non-trivial work to clean up after. Non-zero because it's 708 /// conceivable that qualifiers (objc_gc(weak)?) could make 709 /// something require destruction. 710 DestructionKind isDestructedType() const { 711 return isDestructedTypeImpl(*this); 712 } 713 714private: 715 // These methods are implemented in a separate translation unit; 716 // "static"-ize them to avoid creating temporary QualTypes in the 717 // caller. 718 static bool isConstant(QualType T, ASTContext& Ctx); 719 static QualType getDesugaredType(QualType T, const ASTContext &Context); 720 static SplitQualType getSplitDesugaredType(QualType T); 721 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 722 static QualType IgnoreParens(QualType T); 723 static DestructionKind isDestructedTypeImpl(QualType type); 724}; 725 726} // end clang. 727 728namespace llvm { 729/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 730/// to a specific Type class. 731template<> struct simplify_type<const ::clang::QualType> { 732 typedef const ::clang::Type *SimpleType; 733 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 734 return Val.getTypePtr(); 735 } 736}; 737template<> struct simplify_type< ::clang::QualType> 738 : public simplify_type<const ::clang::QualType> {}; 739 740// Teach SmallPtrSet that QualType is "basically a pointer". 741template<> 742class PointerLikeTypeTraits<clang::QualType> { 743public: 744 static inline void *getAsVoidPointer(clang::QualType P) { 745 return P.getAsOpaquePtr(); 746 } 747 static inline clang::QualType getFromVoidPointer(void *P) { 748 return clang::QualType::getFromOpaquePtr(P); 749 } 750 // Various qualifiers go in low bits. 751 enum { NumLowBitsAvailable = 0 }; 752}; 753 754} // end namespace llvm 755 756namespace clang { 757 758/// \brief Base class that is common to both the \c ExtQuals and \c Type 759/// classes, which allows \c QualType to access the common fields between the 760/// two. 761/// 762class ExtQualsTypeCommonBase { 763 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 764 : BaseType(baseType), CanonicalType(canon) {} 765 766 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 767 /// a self-referential pointer (for \c Type). 768 /// 769 /// This pointer allows an efficient mapping from a QualType to its 770 /// underlying type pointer. 771 const Type *const BaseType; 772 773 /// \brief The canonical type of this type. A QualType. 774 QualType CanonicalType; 775 776 friend class QualType; 777 friend class Type; 778 friend class ExtQuals; 779}; 780 781/// ExtQuals - We can encode up to four bits in the low bits of a 782/// type pointer, but there are many more type qualifiers that we want 783/// to be able to apply to an arbitrary type. Therefore we have this 784/// struct, intended to be heap-allocated and used by QualType to 785/// store qualifiers. 786/// 787/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 788/// in three low bits on the QualType pointer; a fourth bit records whether 789/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 790/// Objective-C GC attributes) are much more rare. 791class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 792 // NOTE: changing the fast qualifiers should be straightforward as 793 // long as you don't make 'const' non-fast. 794 // 1. Qualifiers: 795 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 796 // Fast qualifiers must occupy the low-order bits. 797 // b) Update Qualifiers::FastWidth and FastMask. 798 // 2. QualType: 799 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 800 // b) Update remove{Volatile,Restrict}, defined near the end of 801 // this header. 802 // 3. ASTContext: 803 // a) Update get{Volatile,Restrict}Type. 804 805 /// Quals - the immutable set of qualifiers applied by this 806 /// node; always contains extended qualifiers. 807 Qualifiers Quals; 808 809 ExtQuals *this_() { return this; } 810 811public: 812 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 813 : ExtQualsTypeCommonBase(baseType, 814 canon.isNull() ? QualType(this_(), 0) : canon), 815 Quals(quals) 816 { 817 assert(Quals.hasNonFastQualifiers() 818 && "ExtQuals created with no fast qualifiers"); 819 assert(!Quals.hasFastQualifiers() 820 && "ExtQuals created with fast qualifiers"); 821 } 822 823 Qualifiers getQualifiers() const { return Quals; } 824 825 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 826 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 827 828 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 829 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 830 831 const Type *getBaseType() const { return BaseType; } 832 833public: 834 void Profile(llvm::FoldingSetNodeID &ID) const { 835 Profile(ID, getBaseType(), Quals); 836 } 837 static void Profile(llvm::FoldingSetNodeID &ID, 838 const Type *BaseType, 839 Qualifiers Quals) { 840 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 841 ID.AddPointer(BaseType); 842 Quals.Profile(ID); 843 } 844}; 845 846/// \brief The kind of C++0x ref-qualifier associated with a function type, 847/// which determines whether a member function's "this" object can be an 848/// lvalue, rvalue, or neither. 849enum RefQualifierKind { 850 /// \brief No ref-qualifier was provided. 851 RQ_None = 0, 852 /// \brief An lvalue ref-qualifier was provided (\c &). 853 RQ_LValue, 854 /// \brief An rvalue ref-qualifier was provided (\c &&). 855 RQ_RValue 856}; 857 858/// Type - This is the base class of the type hierarchy. A central concept 859/// with types is that each type always has a canonical type. A canonical type 860/// is the type with any typedef names stripped out of it or the types it 861/// references. For example, consider: 862/// 863/// typedef int foo; 864/// typedef foo* bar; 865/// 'int *' 'foo *' 'bar' 866/// 867/// There will be a Type object created for 'int'. Since int is canonical, its 868/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 869/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 870/// there is a PointerType that represents 'int*', which, like 'int', is 871/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 872/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 873/// is also 'int*'. 874/// 875/// Non-canonical types are useful for emitting diagnostics, without losing 876/// information about typedefs being used. Canonical types are useful for type 877/// comparisons (they allow by-pointer equality tests) and useful for reasoning 878/// about whether something has a particular form (e.g. is a function type), 879/// because they implicitly, recursively, strip all typedefs out of a type. 880/// 881/// Types, once created, are immutable. 882/// 883class Type : public ExtQualsTypeCommonBase { 884public: 885 enum TypeClass { 886#define TYPE(Class, Base) Class, 887#define LAST_TYPE(Class) TypeLast = Class, 888#define ABSTRACT_TYPE(Class, Base) 889#include "clang/AST/TypeNodes.def" 890 TagFirst = Record, TagLast = Enum 891 }; 892 893private: 894 Type(const Type&); // DO NOT IMPLEMENT. 895 void operator=(const Type&); // DO NOT IMPLEMENT. 896 897 /// Bitfields required by the Type class. 898 class TypeBitfields { 899 friend class Type; 900 template <class T> friend class TypePropertyCache; 901 902 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 903 unsigned TC : 8; 904 905 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 906 /// Note that this should stay at the end of the ivars for Type so that 907 /// subclasses can pack their bitfields into the same word. 908 unsigned Dependent : 1; 909 910 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 911 unsigned VariablyModified : 1; 912 913 /// \brief Whether this type contains an unexpanded parameter pack 914 /// (for C++0x variadic templates). 915 unsigned ContainsUnexpandedParameterPack : 1; 916 917 /// \brief Nonzero if the cache (i.e. the bitfields here starting 918 /// with 'Cache') is valid. If so, then this is a 919 /// LangOptions::VisibilityMode+1. 920 mutable unsigned CacheValidAndVisibility : 2; 921 922 /// \brief Linkage of this type. 923 mutable unsigned CachedLinkage : 2; 924 925 /// \brief Whether this type involves and local or unnamed types. 926 mutable unsigned CachedLocalOrUnnamed : 1; 927 928 /// \brief FromAST - Whether this type comes from an AST file. 929 mutable unsigned FromAST : 1; 930 931 bool isCacheValid() const { 932 return (CacheValidAndVisibility != 0); 933 } 934 Visibility getVisibility() const { 935 assert(isCacheValid() && "getting linkage from invalid cache"); 936 return static_cast<Visibility>(CacheValidAndVisibility-1); 937 } 938 Linkage getLinkage() const { 939 assert(isCacheValid() && "getting linkage from invalid cache"); 940 return static_cast<Linkage>(CachedLinkage); 941 } 942 bool hasLocalOrUnnamedType() const { 943 assert(isCacheValid() && "getting linkage from invalid cache"); 944 return CachedLocalOrUnnamed; 945 } 946 }; 947 enum { NumTypeBits = 17 }; 948 949protected: 950 // These classes allow subclasses to somewhat cleanly pack bitfields 951 // into Type. 952 953 class ArrayTypeBitfields { 954 friend class ArrayType; 955 956 unsigned : NumTypeBits; 957 958 /// IndexTypeQuals - CVR qualifiers from declarations like 959 /// 'int X[static restrict 4]'. For function parameters only. 960 unsigned IndexTypeQuals : 3; 961 962 /// SizeModifier - storage class qualifiers from declarations like 963 /// 'int X[static restrict 4]'. For function parameters only. 964 /// Actually an ArrayType::ArraySizeModifier. 965 unsigned SizeModifier : 3; 966 }; 967 968 class BuiltinTypeBitfields { 969 friend class BuiltinType; 970 971 unsigned : NumTypeBits; 972 973 /// The kind (BuiltinType::Kind) of builtin type this is. 974 unsigned Kind : 8; 975 }; 976 977 class FunctionTypeBitfields { 978 friend class FunctionType; 979 980 unsigned : NumTypeBits; 981 982 /// Extra information which affects how the function is called, like 983 /// regparm and the calling convention. 984 unsigned ExtInfo : 8; 985 986 /// Whether the function is variadic. Only used by FunctionProtoType. 987 unsigned Variadic : 1; 988 989 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 990 /// other bitfields. 991 /// The qualifiers are part of FunctionProtoType because... 992 /// 993 /// C++ 8.3.5p4: The return type, the parameter type list and the 994 /// cv-qualifier-seq, [...], are part of the function type. 995 unsigned TypeQuals : 3; 996 997 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 998 /// 999 /// This is a value of type \c RefQualifierKind. 1000 unsigned RefQualifier : 2; 1001 }; 1002 1003 class ObjCObjectTypeBitfields { 1004 friend class ObjCObjectType; 1005 1006 unsigned : NumTypeBits; 1007 1008 /// NumProtocols - The number of protocols stored directly on this 1009 /// object type. 1010 unsigned NumProtocols : 32 - NumTypeBits; 1011 }; 1012 1013 class ReferenceTypeBitfields { 1014 friend class ReferenceType; 1015 1016 unsigned : NumTypeBits; 1017 1018 /// True if the type was originally spelled with an lvalue sigil. 1019 /// This is never true of rvalue references but can also be false 1020 /// on lvalue references because of C++0x [dcl.typedef]p9, 1021 /// as follows: 1022 /// 1023 /// typedef int &ref; // lvalue, spelled lvalue 1024 /// typedef int &&rvref; // rvalue 1025 /// ref &a; // lvalue, inner ref, spelled lvalue 1026 /// ref &&a; // lvalue, inner ref 1027 /// rvref &a; // lvalue, inner ref, spelled lvalue 1028 /// rvref &&a; // rvalue, inner ref 1029 unsigned SpelledAsLValue : 1; 1030 1031 /// True if the inner type is a reference type. This only happens 1032 /// in non-canonical forms. 1033 unsigned InnerRef : 1; 1034 }; 1035 1036 class TypeWithKeywordBitfields { 1037 friend class TypeWithKeyword; 1038 1039 unsigned : NumTypeBits; 1040 1041 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1042 unsigned Keyword : 8; 1043 }; 1044 1045 class VectorTypeBitfields { 1046 friend class VectorType; 1047 1048 unsigned : NumTypeBits; 1049 1050 /// VecKind - The kind of vector, either a generic vector type or some 1051 /// target-specific vector type such as for AltiVec or Neon. 1052 unsigned VecKind : 3; 1053 1054 /// NumElements - The number of elements in the vector. 1055 unsigned NumElements : 29 - NumTypeBits; 1056 }; 1057 1058 class AttributedTypeBitfields { 1059 friend class AttributedType; 1060 1061 unsigned : NumTypeBits; 1062 1063 /// AttrKind - an AttributedType::Kind 1064 unsigned AttrKind : 32 - NumTypeBits; 1065 }; 1066 1067 union { 1068 TypeBitfields TypeBits; 1069 ArrayTypeBitfields ArrayTypeBits; 1070 AttributedTypeBitfields AttributedTypeBits; 1071 BuiltinTypeBitfields BuiltinTypeBits; 1072 FunctionTypeBitfields FunctionTypeBits; 1073 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1074 ReferenceTypeBitfields ReferenceTypeBits; 1075 TypeWithKeywordBitfields TypeWithKeywordBits; 1076 VectorTypeBitfields VectorTypeBits; 1077 }; 1078 1079private: 1080 /// \brief Set whether this type comes from an AST file. 1081 void setFromAST(bool V = true) const { 1082 TypeBits.FromAST = V; 1083 } 1084 1085 template <class T> friend class TypePropertyCache; 1086 1087protected: 1088 // silence VC++ warning C4355: 'this' : used in base member initializer list 1089 Type *this_() { return this; } 1090 Type(TypeClass tc, QualType canon, bool Dependent, bool VariablyModified, 1091 bool ContainsUnexpandedParameterPack) 1092 : ExtQualsTypeCommonBase(this, 1093 canon.isNull() ? QualType(this_(), 0) : canon) { 1094 TypeBits.TC = tc; 1095 TypeBits.Dependent = Dependent; 1096 TypeBits.VariablyModified = VariablyModified; 1097 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1098 TypeBits.CacheValidAndVisibility = 0; 1099 TypeBits.CachedLocalOrUnnamed = false; 1100 TypeBits.CachedLinkage = NoLinkage; 1101 TypeBits.FromAST = false; 1102 } 1103 friend class ASTContext; 1104 1105 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1106 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1107 void setContainsUnexpandedParameterPack(bool PP = true) { 1108 TypeBits.ContainsUnexpandedParameterPack = PP; 1109 } 1110 1111public: 1112 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1113 1114 /// \brief Whether this type comes from an AST file. 1115 bool isFromAST() const { return TypeBits.FromAST; } 1116 1117 /// \brief Whether this type is or contains an unexpanded parameter 1118 /// pack, used to support C++0x variadic templates. 1119 /// 1120 /// A type that contains a parameter pack shall be expanded by the 1121 /// ellipsis operator at some point. For example, the typedef in the 1122 /// following example contains an unexpanded parameter pack 'T': 1123 /// 1124 /// \code 1125 /// template<typename ...T> 1126 /// struct X { 1127 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1128 /// }; 1129 /// \endcode 1130 /// 1131 /// Note that this routine does not specify which 1132 bool containsUnexpandedParameterPack() const { 1133 return TypeBits.ContainsUnexpandedParameterPack; 1134 } 1135 1136 /// Determines if this type would be canonical if it had no further 1137 /// qualification. 1138 bool isCanonicalUnqualified() const { 1139 return CanonicalType == QualType(this, 0); 1140 } 1141 1142 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1143 /// object types, function types, and incomplete types. 1144 1145 /// isIncompleteType - Return true if this is an incomplete type. 1146 /// A type that can describe objects, but which lacks information needed to 1147 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1148 /// routine will need to determine if the size is actually required. 1149 bool isIncompleteType() const; 1150 1151 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1152 /// type, in other words, not a function type. 1153 bool isIncompleteOrObjectType() const { 1154 return !isFunctionType(); 1155 } 1156 1157 /// \brief Determine whether this type is an object type. 1158 bool isObjectType() const { 1159 // C++ [basic.types]p8: 1160 // An object type is a (possibly cv-qualified) type that is not a 1161 // function type, not a reference type, and not a void type. 1162 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1163 } 1164 1165 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1166 bool isPODType() const; 1167 1168 /// isLiteralType - Return true if this is a literal type 1169 /// (C++0x [basic.types]p10) 1170 bool isLiteralType() const; 1171 1172 /// Helper methods to distinguish type categories. All type predicates 1173 /// operate on the canonical type, ignoring typedefs and qualifiers. 1174 1175 /// isBuiltinType - returns true if the type is a builtin type. 1176 bool isBuiltinType() const; 1177 1178 /// isSpecificBuiltinType - Test for a particular builtin type. 1179 bool isSpecificBuiltinType(unsigned K) const; 1180 1181 /// isPlaceholderType - Test for a type which does not represent an 1182 /// actual type-system type but is instead used as a placeholder for 1183 /// various convenient purposes within Clang. All such types are 1184 /// BuiltinTypes. 1185 bool isPlaceholderType() const; 1186 1187 /// isIntegerType() does *not* include complex integers (a GCC extension). 1188 /// isComplexIntegerType() can be used to test for complex integers. 1189 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1190 bool isEnumeralType() const; 1191 bool isBooleanType() const; 1192 bool isCharType() const; 1193 bool isWideCharType() const; 1194 bool isAnyCharacterType() const; 1195 bool isIntegralType(ASTContext &Ctx) const; 1196 1197 /// \brief Determine whether this type is an integral or enumeration type. 1198 bool isIntegralOrEnumerationType() const; 1199 /// \brief Determine whether this type is an integral or unscoped enumeration 1200 /// type. 1201 bool isIntegralOrUnscopedEnumerationType() const; 1202 1203 /// Floating point categories. 1204 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1205 /// isComplexType() does *not* include complex integers (a GCC extension). 1206 /// isComplexIntegerType() can be used to test for complex integers. 1207 bool isComplexType() const; // C99 6.2.5p11 (complex) 1208 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1209 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1210 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1211 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1212 bool isVoidType() const; // C99 6.2.5p19 1213 bool isDerivedType() const; // C99 6.2.5p20 1214 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1215 bool isAggregateType() const; 1216 1217 // Type Predicates: Check to see if this type is structurally the specified 1218 // type, ignoring typedefs and qualifiers. 1219 bool isFunctionType() const; 1220 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1221 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1222 bool isPointerType() const; 1223 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1224 bool isBlockPointerType() const; 1225 bool isVoidPointerType() const; 1226 bool isReferenceType() const; 1227 bool isLValueReferenceType() const; 1228 bool isRValueReferenceType() const; 1229 bool isFunctionPointerType() const; 1230 bool isMemberPointerType() const; 1231 bool isMemberFunctionPointerType() const; 1232 bool isMemberDataPointerType() const; 1233 bool isArrayType() const; 1234 bool isConstantArrayType() const; 1235 bool isIncompleteArrayType() const; 1236 bool isVariableArrayType() const; 1237 bool isDependentSizedArrayType() const; 1238 bool isRecordType() const; 1239 bool isClassType() const; 1240 bool isStructureType() const; 1241 bool isStructureOrClassType() const; 1242 bool isUnionType() const; 1243 bool isComplexIntegerType() const; // GCC _Complex integer type. 1244 bool isVectorType() const; // GCC vector type. 1245 bool isExtVectorType() const; // Extended vector type. 1246 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1247 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1248 // for the common case. 1249 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1250 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1251 bool isObjCQualifiedIdType() const; // id<foo> 1252 bool isObjCQualifiedClassType() const; // Class<foo> 1253 bool isObjCObjectOrInterfaceType() const; 1254 bool isObjCIdType() const; // id 1255 bool isObjCClassType() const; // Class 1256 bool isObjCSelType() const; // Class 1257 bool isObjCBuiltinType() const; // 'id' or 'Class' 1258 bool isTemplateTypeParmType() const; // C++ template type parameter 1259 bool isNullPtrType() const; // C++0x nullptr_t 1260 1261 enum ScalarTypeKind { 1262 STK_Pointer, 1263 STK_MemberPointer, 1264 STK_Bool, 1265 STK_Integral, 1266 STK_Floating, 1267 STK_IntegralComplex, 1268 STK_FloatingComplex 1269 }; 1270 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1271 ScalarTypeKind getScalarTypeKind() const; 1272 1273 /// isDependentType - Whether this type is a dependent type, meaning 1274 /// that its definition somehow depends on a template parameter 1275 /// (C++ [temp.dep.type]). 1276 bool isDependentType() const { return TypeBits.Dependent; } 1277 1278 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1279 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1280 1281 /// \brief Whether this type involves a variable-length array type 1282 /// with a definite size. 1283 bool hasSizedVLAType() const; 1284 1285 /// \brief Whether this type is or contains a local or unnamed type. 1286 bool hasUnnamedOrLocalType() const; 1287 1288 bool isOverloadableType() const; 1289 1290 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1291 bool isElaboratedTypeSpecifier() const; 1292 1293 /// hasPointerRepresentation - Whether this type is represented 1294 /// natively as a pointer; this includes pointers, references, block 1295 /// pointers, and Objective-C interface, qualified id, and qualified 1296 /// interface types, as well as nullptr_t. 1297 bool hasPointerRepresentation() const; 1298 1299 /// hasObjCPointerRepresentation - Whether this type can represent 1300 /// an objective pointer type for the purpose of GC'ability 1301 bool hasObjCPointerRepresentation() const; 1302 1303 /// \brief Determine whether this type has an integer representation 1304 /// of some sort, e.g., it is an integer type or a vector. 1305 bool hasIntegerRepresentation() const; 1306 1307 /// \brief Determine whether this type has an signed integer representation 1308 /// of some sort, e.g., it is an signed integer type or a vector. 1309 bool hasSignedIntegerRepresentation() const; 1310 1311 /// \brief Determine whether this type has an unsigned integer representation 1312 /// of some sort, e.g., it is an unsigned integer type or a vector. 1313 bool hasUnsignedIntegerRepresentation() const; 1314 1315 /// \brief Determine whether this type has a floating-point representation 1316 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1317 bool hasFloatingRepresentation() const; 1318 1319 // Type Checking Functions: Check to see if this type is structurally the 1320 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1321 // the best type we can. 1322 const RecordType *getAsStructureType() const; 1323 /// NOTE: getAs*ArrayType are methods on ASTContext. 1324 const RecordType *getAsUnionType() const; 1325 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1326 // The following is a convenience method that returns an ObjCObjectPointerType 1327 // for object declared using an interface. 1328 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1329 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1330 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1331 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1332 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1333 1334 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1335 /// because the type is a RecordType or because it is the injected-class-name 1336 /// type of a class template or class template partial specialization. 1337 CXXRecordDecl *getAsCXXRecordDecl() const; 1338 1339 /// \brief Get the AutoType whose type will be deduced for a variable with 1340 /// an initializer of this type. This looks through declarators like pointer 1341 /// types, but not through decltype or typedefs. 1342 AutoType *getContainedAutoType() const; 1343 1344 /// Member-template getAs<specific type>'. Look through sugar for 1345 /// an instance of <specific type>. This scheme will eventually 1346 /// replace the specific getAsXXXX methods above. 1347 /// 1348 /// There are some specializations of this member template listed 1349 /// immediately following this class. 1350 template <typename T> const T *getAs() const; 1351 1352 /// A variant of getAs<> for array types which silently discards 1353 /// qualifiers from the outermost type. 1354 const ArrayType *getAsArrayTypeUnsafe() const; 1355 1356 /// Member-template castAs<specific type>. Look through sugar for 1357 /// the underlying instance of <specific type>. 1358 /// 1359 /// This method has the same relationship to getAs<T> as cast<T> has 1360 /// to dyn_cast<T>; which is to say, the underlying type *must* 1361 /// have the intended type, and this method will never return null. 1362 template <typename T> const T *castAs() const; 1363 1364 /// A variant of castAs<> for array type which silently discards 1365 /// qualifiers from the outermost type. 1366 const ArrayType *castAsArrayTypeUnsafe() const; 1367 1368 /// getBaseElementTypeUnsafe - Get the base element type of this 1369 /// type, potentially discarding type qualifiers. This method 1370 /// should never be used when type qualifiers are meaningful. 1371 const Type *getBaseElementTypeUnsafe() const; 1372 1373 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1374 /// element type of the array, potentially with type qualifiers missing. 1375 /// This method should never be used when type qualifiers are meaningful. 1376 const Type *getArrayElementTypeNoTypeQual() const; 1377 1378 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1379 /// pointer, this returns the respective pointee. 1380 QualType getPointeeType() const; 1381 1382 /// getUnqualifiedDesugaredType() - Return the specified type with 1383 /// any "sugar" removed from the type, removing any typedefs, 1384 /// typeofs, etc., as well as any qualifiers. 1385 const Type *getUnqualifiedDesugaredType() const; 1386 1387 /// More type predicates useful for type checking/promotion 1388 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1389 1390 /// isSignedIntegerType - Return true if this is an integer type that is 1391 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1392 /// an enum decl which has a signed representation, or a vector of signed 1393 /// integer element type. 1394 bool isSignedIntegerType() const; 1395 1396 /// isUnsignedIntegerType - Return true if this is an integer type that is 1397 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1398 /// decl which has an unsigned representation, or a vector of unsigned integer 1399 /// element type. 1400 bool isUnsignedIntegerType() const; 1401 1402 /// isConstantSizeType - Return true if this is not a variable sized type, 1403 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1404 /// incomplete types. 1405 bool isConstantSizeType() const; 1406 1407 /// isSpecifierType - Returns true if this type can be represented by some 1408 /// set of type specifiers. 1409 bool isSpecifierType() const; 1410 1411 /// \brief Determine the linkage of this type. 1412 Linkage getLinkage() const; 1413 1414 /// \brief Determine the visibility of this type. 1415 Visibility getVisibility() const; 1416 1417 /// \brief Determine the linkage and visibility of this type. 1418 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1419 1420 /// \brief Note that the linkage is no longer known. 1421 void ClearLinkageCache(); 1422 1423 const char *getTypeClassName() const; 1424 1425 QualType getCanonicalTypeInternal() const { 1426 return CanonicalType; 1427 } 1428 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1429 void dump() const; 1430 static bool classof(const Type *) { return true; } 1431 1432 friend class ASTReader; 1433 friend class ASTWriter; 1434}; 1435 1436template <> inline const TypedefType *Type::getAs() const { 1437 return dyn_cast<TypedefType>(this); 1438} 1439 1440// We can do canonical leaf types faster, because we don't have to 1441// worry about preserving child type decoration. 1442#define TYPE(Class, Base) 1443#define LEAF_TYPE(Class) \ 1444template <> inline const Class##Type *Type::getAs() const { \ 1445 return dyn_cast<Class##Type>(CanonicalType); \ 1446} \ 1447template <> inline const Class##Type *Type::castAs() const { \ 1448 return cast<Class##Type>(CanonicalType); \ 1449} 1450#include "clang/AST/TypeNodes.def" 1451 1452 1453/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1454/// types are always canonical and have a literal name field. 1455class BuiltinType : public Type { 1456public: 1457 enum Kind { 1458 Void, 1459 1460 Bool, // This is bool and/or _Bool. 1461 Char_U, // This is 'char' for targets where char is unsigned. 1462 UChar, // This is explicitly qualified unsigned char. 1463 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1464 Char16, // This is 'char16_t' for C++. 1465 Char32, // This is 'char32_t' for C++. 1466 UShort, 1467 UInt, 1468 ULong, 1469 ULongLong, 1470 UInt128, // __uint128_t 1471 1472 Char_S, // This is 'char' for targets where char is signed. 1473 SChar, // This is explicitly qualified signed char. 1474 WChar_S, // This is 'wchar_t' for C++, when signed. 1475 Short, 1476 Int, 1477 Long, 1478 LongLong, 1479 Int128, // __int128_t 1480 1481 Float, Double, LongDouble, 1482 1483 NullPtr, // This is the type of C++0x 'nullptr'. 1484 1485 /// This represents the type of an expression whose type is 1486 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1487 /// appear in situations where the structure of the type is 1488 /// theoretically deducible. 1489 Dependent, 1490 1491 Overload, // This represents the type of an overloaded function declaration. 1492 1493 /// The primitive Objective C 'id' type. The type pointed to by the 1494 /// user-visible 'id' type. Only ever shows up in an AST as the base 1495 /// type of an ObjCObjectType. 1496 ObjCId, 1497 1498 /// The primitive Objective C 'Class' type. The type pointed to by the 1499 /// user-visible 'Class' type. Only ever shows up in an AST as the 1500 /// base type of an ObjCObjectType. 1501 ObjCClass, 1502 1503 ObjCSel // This represents the ObjC 'SEL' type. 1504 }; 1505 1506public: 1507 BuiltinType(Kind K) 1508 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1509 /*VariablyModified=*/false, 1510 /*Unexpanded paramter pack=*/false) { 1511 BuiltinTypeBits.Kind = K; 1512 } 1513 1514 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1515 const char *getName(const LangOptions &LO) const; 1516 1517 bool isSugared() const { return false; } 1518 QualType desugar() const { return QualType(this, 0); } 1519 1520 bool isInteger() const { 1521 return getKind() >= Bool && getKind() <= Int128; 1522 } 1523 1524 bool isSignedInteger() const { 1525 return getKind() >= Char_S && getKind() <= Int128; 1526 } 1527 1528 bool isUnsignedInteger() const { 1529 return getKind() >= Bool && getKind() <= UInt128; 1530 } 1531 1532 bool isFloatingPoint() const { 1533 return getKind() >= Float && getKind() <= LongDouble; 1534 } 1535 1536 /// Determines whether this type is a "forbidden" placeholder type, 1537 /// i.e. a type which cannot appear in arbitrary positions in a 1538 /// fully-formed expression. 1539 bool isPlaceholderType() const { 1540 return getKind() == Overload; 1541 } 1542 1543 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1544 static bool classof(const BuiltinType *) { return true; } 1545}; 1546 1547/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1548/// types (_Complex float etc) as well as the GCC integer complex extensions. 1549/// 1550class ComplexType : public Type, public llvm::FoldingSetNode { 1551 QualType ElementType; 1552 ComplexType(QualType Element, QualType CanonicalPtr) : 1553 Type(Complex, CanonicalPtr, Element->isDependentType(), 1554 Element->isVariablyModifiedType(), 1555 Element->containsUnexpandedParameterPack()), 1556 ElementType(Element) { 1557 } 1558 friend class ASTContext; // ASTContext creates these. 1559 1560public: 1561 QualType getElementType() const { return ElementType; } 1562 1563 bool isSugared() const { return false; } 1564 QualType desugar() const { return QualType(this, 0); } 1565 1566 void Profile(llvm::FoldingSetNodeID &ID) { 1567 Profile(ID, getElementType()); 1568 } 1569 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1570 ID.AddPointer(Element.getAsOpaquePtr()); 1571 } 1572 1573 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1574 static bool classof(const ComplexType *) { return true; } 1575}; 1576 1577/// ParenType - Sugar for parentheses used when specifying types. 1578/// 1579class ParenType : public Type, public llvm::FoldingSetNode { 1580 QualType Inner; 1581 1582 ParenType(QualType InnerType, QualType CanonType) : 1583 Type(Paren, CanonType, InnerType->isDependentType(), 1584 InnerType->isVariablyModifiedType(), 1585 InnerType->containsUnexpandedParameterPack()), 1586 Inner(InnerType) { 1587 } 1588 friend class ASTContext; // ASTContext creates these. 1589 1590public: 1591 1592 QualType getInnerType() const { return Inner; } 1593 1594 bool isSugared() const { return true; } 1595 QualType desugar() const { return getInnerType(); } 1596 1597 void Profile(llvm::FoldingSetNodeID &ID) { 1598 Profile(ID, getInnerType()); 1599 } 1600 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1601 Inner.Profile(ID); 1602 } 1603 1604 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1605 static bool classof(const ParenType *) { return true; } 1606}; 1607 1608/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1609/// 1610class PointerType : public Type, public llvm::FoldingSetNode { 1611 QualType PointeeType; 1612 1613 PointerType(QualType Pointee, QualType CanonicalPtr) : 1614 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1615 Pointee->isVariablyModifiedType(), 1616 Pointee->containsUnexpandedParameterPack()), 1617 PointeeType(Pointee) { 1618 } 1619 friend class ASTContext; // ASTContext creates these. 1620 1621public: 1622 1623 QualType getPointeeType() const { return PointeeType; } 1624 1625 bool isSugared() const { return false; } 1626 QualType desugar() const { return QualType(this, 0); } 1627 1628 void Profile(llvm::FoldingSetNodeID &ID) { 1629 Profile(ID, getPointeeType()); 1630 } 1631 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1632 ID.AddPointer(Pointee.getAsOpaquePtr()); 1633 } 1634 1635 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1636 static bool classof(const PointerType *) { return true; } 1637}; 1638 1639/// BlockPointerType - pointer to a block type. 1640/// This type is to represent types syntactically represented as 1641/// "void (^)(int)", etc. Pointee is required to always be a function type. 1642/// 1643class BlockPointerType : public Type, public llvm::FoldingSetNode { 1644 QualType PointeeType; // Block is some kind of pointer type 1645 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1646 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1647 Pointee->isVariablyModifiedType(), 1648 Pointee->containsUnexpandedParameterPack()), 1649 PointeeType(Pointee) { 1650 } 1651 friend class ASTContext; // ASTContext creates these. 1652 1653public: 1654 1655 // Get the pointee type. Pointee is required to always be a function type. 1656 QualType getPointeeType() const { return PointeeType; } 1657 1658 bool isSugared() const { return false; } 1659 QualType desugar() const { return QualType(this, 0); } 1660 1661 void Profile(llvm::FoldingSetNodeID &ID) { 1662 Profile(ID, getPointeeType()); 1663 } 1664 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1665 ID.AddPointer(Pointee.getAsOpaquePtr()); 1666 } 1667 1668 static bool classof(const Type *T) { 1669 return T->getTypeClass() == BlockPointer; 1670 } 1671 static bool classof(const BlockPointerType *) { return true; } 1672}; 1673 1674/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1675/// 1676class ReferenceType : public Type, public llvm::FoldingSetNode { 1677 QualType PointeeType; 1678 1679protected: 1680 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1681 bool SpelledAsLValue) : 1682 Type(tc, CanonicalRef, Referencee->isDependentType(), 1683 Referencee->isVariablyModifiedType(), 1684 Referencee->containsUnexpandedParameterPack()), 1685 PointeeType(Referencee) 1686 { 1687 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1688 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1689 } 1690 1691public: 1692 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1693 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1694 1695 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1696 QualType getPointeeType() const { 1697 // FIXME: this might strip inner qualifiers; okay? 1698 const ReferenceType *T = this; 1699 while (T->isInnerRef()) 1700 T = T->PointeeType->castAs<ReferenceType>(); 1701 return T->PointeeType; 1702 } 1703 1704 void Profile(llvm::FoldingSetNodeID &ID) { 1705 Profile(ID, PointeeType, isSpelledAsLValue()); 1706 } 1707 static void Profile(llvm::FoldingSetNodeID &ID, 1708 QualType Referencee, 1709 bool SpelledAsLValue) { 1710 ID.AddPointer(Referencee.getAsOpaquePtr()); 1711 ID.AddBoolean(SpelledAsLValue); 1712 } 1713 1714 static bool classof(const Type *T) { 1715 return T->getTypeClass() == LValueReference || 1716 T->getTypeClass() == RValueReference; 1717 } 1718 static bool classof(const ReferenceType *) { return true; } 1719}; 1720 1721/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1722/// 1723class LValueReferenceType : public ReferenceType { 1724 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1725 bool SpelledAsLValue) : 1726 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1727 {} 1728 friend class ASTContext; // ASTContext creates these 1729public: 1730 bool isSugared() const { return false; } 1731 QualType desugar() const { return QualType(this, 0); } 1732 1733 static bool classof(const Type *T) { 1734 return T->getTypeClass() == LValueReference; 1735 } 1736 static bool classof(const LValueReferenceType *) { return true; } 1737}; 1738 1739/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1740/// 1741class RValueReferenceType : public ReferenceType { 1742 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1743 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1744 } 1745 friend class ASTContext; // ASTContext creates these 1746public: 1747 bool isSugared() const { return false; } 1748 QualType desugar() const { return QualType(this, 0); } 1749 1750 static bool classof(const Type *T) { 1751 return T->getTypeClass() == RValueReference; 1752 } 1753 static bool classof(const RValueReferenceType *) { return true; } 1754}; 1755 1756/// MemberPointerType - C++ 8.3.3 - Pointers to members 1757/// 1758class MemberPointerType : public Type, public llvm::FoldingSetNode { 1759 QualType PointeeType; 1760 /// The class of which the pointee is a member. Must ultimately be a 1761 /// RecordType, but could be a typedef or a template parameter too. 1762 const Type *Class; 1763 1764 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1765 Type(MemberPointer, CanonicalPtr, 1766 Cls->isDependentType() || Pointee->isDependentType(), 1767 Pointee->isVariablyModifiedType(), 1768 (Cls->containsUnexpandedParameterPack() || 1769 Pointee->containsUnexpandedParameterPack())), 1770 PointeeType(Pointee), Class(Cls) { 1771 } 1772 friend class ASTContext; // ASTContext creates these. 1773 1774public: 1775 QualType getPointeeType() const { return PointeeType; } 1776 1777 /// Returns true if the member type (i.e. the pointee type) is a 1778 /// function type rather than a data-member type. 1779 bool isMemberFunctionPointer() const { 1780 return PointeeType->isFunctionProtoType(); 1781 } 1782 1783 /// Returns true if the member type (i.e. the pointee type) is a 1784 /// data type rather than a function type. 1785 bool isMemberDataPointer() const { 1786 return !PointeeType->isFunctionProtoType(); 1787 } 1788 1789 const Type *getClass() const { return Class; } 1790 1791 bool isSugared() const { return false; } 1792 QualType desugar() const { return QualType(this, 0); } 1793 1794 void Profile(llvm::FoldingSetNodeID &ID) { 1795 Profile(ID, getPointeeType(), getClass()); 1796 } 1797 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1798 const Type *Class) { 1799 ID.AddPointer(Pointee.getAsOpaquePtr()); 1800 ID.AddPointer(Class); 1801 } 1802 1803 static bool classof(const Type *T) { 1804 return T->getTypeClass() == MemberPointer; 1805 } 1806 static bool classof(const MemberPointerType *) { return true; } 1807}; 1808 1809/// ArrayType - C99 6.7.5.2 - Array Declarators. 1810/// 1811class ArrayType : public Type, public llvm::FoldingSetNode { 1812public: 1813 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1814 /// an array with a static size (e.g. int X[static 4]), or an array 1815 /// with a star size (e.g. int X[*]). 1816 /// 'static' is only allowed on function parameters. 1817 enum ArraySizeModifier { 1818 Normal, Static, Star 1819 }; 1820private: 1821 /// ElementType - The element type of the array. 1822 QualType ElementType; 1823 1824protected: 1825 // C++ [temp.dep.type]p1: 1826 // A type is dependent if it is... 1827 // - an array type constructed from any dependent type or whose 1828 // size is specified by a constant expression that is 1829 // value-dependent, 1830 ArrayType(TypeClass tc, QualType et, QualType can, 1831 ArraySizeModifier sm, unsigned tq, 1832 bool ContainsUnexpandedParameterPack) 1833 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1834 (tc == VariableArray || et->isVariablyModifiedType()), 1835 ContainsUnexpandedParameterPack), 1836 ElementType(et) { 1837 ArrayTypeBits.IndexTypeQuals = tq; 1838 ArrayTypeBits.SizeModifier = sm; 1839 } 1840 1841 friend class ASTContext; // ASTContext creates these. 1842 1843public: 1844 QualType getElementType() const { return ElementType; } 1845 ArraySizeModifier getSizeModifier() const { 1846 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1847 } 1848 Qualifiers getIndexTypeQualifiers() const { 1849 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1850 } 1851 unsigned getIndexTypeCVRQualifiers() const { 1852 return ArrayTypeBits.IndexTypeQuals; 1853 } 1854 1855 static bool classof(const Type *T) { 1856 return T->getTypeClass() == ConstantArray || 1857 T->getTypeClass() == VariableArray || 1858 T->getTypeClass() == IncompleteArray || 1859 T->getTypeClass() == DependentSizedArray; 1860 } 1861 static bool classof(const ArrayType *) { return true; } 1862}; 1863 1864/// ConstantArrayType - This class represents the canonical version of 1865/// C arrays with a specified constant size. For example, the canonical 1866/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1867/// type is 'int' and the size is 404. 1868class ConstantArrayType : public ArrayType { 1869 llvm::APInt Size; // Allows us to unique the type. 1870 1871 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1872 ArraySizeModifier sm, unsigned tq) 1873 : ArrayType(ConstantArray, et, can, sm, tq, 1874 et->containsUnexpandedParameterPack()), 1875 Size(size) {} 1876protected: 1877 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1878 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1879 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1880 Size(size) {} 1881 friend class ASTContext; // ASTContext creates these. 1882public: 1883 const llvm::APInt &getSize() const { return Size; } 1884 bool isSugared() const { return false; } 1885 QualType desugar() const { return QualType(this, 0); } 1886 1887 1888 /// \brief Determine the number of bits required to address a member of 1889 // an array with the given element type and number of elements. 1890 static unsigned getNumAddressingBits(ASTContext &Context, 1891 QualType ElementType, 1892 const llvm::APInt &NumElements); 1893 1894 /// \brief Determine the maximum number of active bits that an array's size 1895 /// can require, which limits the maximum size of the array. 1896 static unsigned getMaxSizeBits(ASTContext &Context); 1897 1898 void Profile(llvm::FoldingSetNodeID &ID) { 1899 Profile(ID, getElementType(), getSize(), 1900 getSizeModifier(), getIndexTypeCVRQualifiers()); 1901 } 1902 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1903 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1904 unsigned TypeQuals) { 1905 ID.AddPointer(ET.getAsOpaquePtr()); 1906 ID.AddInteger(ArraySize.getZExtValue()); 1907 ID.AddInteger(SizeMod); 1908 ID.AddInteger(TypeQuals); 1909 } 1910 static bool classof(const Type *T) { 1911 return T->getTypeClass() == ConstantArray; 1912 } 1913 static bool classof(const ConstantArrayType *) { return true; } 1914}; 1915 1916/// IncompleteArrayType - This class represents C arrays with an unspecified 1917/// size. For example 'int A[]' has an IncompleteArrayType where the element 1918/// type is 'int' and the size is unspecified. 1919class IncompleteArrayType : public ArrayType { 1920 1921 IncompleteArrayType(QualType et, QualType can, 1922 ArraySizeModifier sm, unsigned tq) 1923 : ArrayType(IncompleteArray, et, can, sm, tq, 1924 et->containsUnexpandedParameterPack()) {} 1925 friend class ASTContext; // ASTContext creates these. 1926public: 1927 bool isSugared() const { return false; } 1928 QualType desugar() const { return QualType(this, 0); } 1929 1930 static bool classof(const Type *T) { 1931 return T->getTypeClass() == IncompleteArray; 1932 } 1933 static bool classof(const IncompleteArrayType *) { return true; } 1934 1935 friend class StmtIteratorBase; 1936 1937 void Profile(llvm::FoldingSetNodeID &ID) { 1938 Profile(ID, getElementType(), getSizeModifier(), 1939 getIndexTypeCVRQualifiers()); 1940 } 1941 1942 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1943 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1944 ID.AddPointer(ET.getAsOpaquePtr()); 1945 ID.AddInteger(SizeMod); 1946 ID.AddInteger(TypeQuals); 1947 } 1948}; 1949 1950/// VariableArrayType - This class represents C arrays with a specified size 1951/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1952/// Since the size expression is an arbitrary expression, we store it as such. 1953/// 1954/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1955/// should not be: two lexically equivalent variable array types could mean 1956/// different things, for example, these variables do not have the same type 1957/// dynamically: 1958/// 1959/// void foo(int x) { 1960/// int Y[x]; 1961/// ++x; 1962/// int Z[x]; 1963/// } 1964/// 1965class VariableArrayType : public ArrayType { 1966 /// SizeExpr - An assignment expression. VLA's are only permitted within 1967 /// a function block. 1968 Stmt *SizeExpr; 1969 /// Brackets - The left and right array brackets. 1970 SourceRange Brackets; 1971 1972 VariableArrayType(QualType et, QualType can, Expr *e, 1973 ArraySizeModifier sm, unsigned tq, 1974 SourceRange brackets) 1975 : ArrayType(VariableArray, et, can, sm, tq, 1976 et->containsUnexpandedParameterPack()), 1977 SizeExpr((Stmt*) e), Brackets(brackets) {} 1978 friend class ASTContext; // ASTContext creates these. 1979 1980public: 1981 Expr *getSizeExpr() const { 1982 // We use C-style casts instead of cast<> here because we do not wish 1983 // to have a dependency of Type.h on Stmt.h/Expr.h. 1984 return (Expr*) SizeExpr; 1985 } 1986 SourceRange getBracketsRange() const { return Brackets; } 1987 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1988 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1989 1990 bool isSugared() const { return false; } 1991 QualType desugar() const { return QualType(this, 0); } 1992 1993 static bool classof(const Type *T) { 1994 return T->getTypeClass() == VariableArray; 1995 } 1996 static bool classof(const VariableArrayType *) { return true; } 1997 1998 friend class StmtIteratorBase; 1999 2000 void Profile(llvm::FoldingSetNodeID &ID) { 2001 assert(0 && "Cannnot unique VariableArrayTypes."); 2002 } 2003}; 2004 2005/// DependentSizedArrayType - This type represents an array type in 2006/// C++ whose size is a value-dependent expression. For example: 2007/// 2008/// \code 2009/// template<typename T, int Size> 2010/// class array { 2011/// T data[Size]; 2012/// }; 2013/// \endcode 2014/// 2015/// For these types, we won't actually know what the array bound is 2016/// until template instantiation occurs, at which point this will 2017/// become either a ConstantArrayType or a VariableArrayType. 2018class DependentSizedArrayType : public ArrayType { 2019 const ASTContext &Context; 2020 2021 /// \brief An assignment expression that will instantiate to the 2022 /// size of the array. 2023 /// 2024 /// The expression itself might be NULL, in which case the array 2025 /// type will have its size deduced from an initializer. 2026 Stmt *SizeExpr; 2027 2028 /// Brackets - The left and right array brackets. 2029 SourceRange Brackets; 2030 2031 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2032 Expr *e, ArraySizeModifier sm, unsigned tq, 2033 SourceRange brackets); 2034 2035 friend class ASTContext; // ASTContext creates these. 2036 2037public: 2038 Expr *getSizeExpr() const { 2039 // We use C-style casts instead of cast<> here because we do not wish 2040 // to have a dependency of Type.h on Stmt.h/Expr.h. 2041 return (Expr*) SizeExpr; 2042 } 2043 SourceRange getBracketsRange() const { return Brackets; } 2044 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2045 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2046 2047 bool isSugared() const { return false; } 2048 QualType desugar() const { return QualType(this, 0); } 2049 2050 static bool classof(const Type *T) { 2051 return T->getTypeClass() == DependentSizedArray; 2052 } 2053 static bool classof(const DependentSizedArrayType *) { return true; } 2054 2055 friend class StmtIteratorBase; 2056 2057 2058 void Profile(llvm::FoldingSetNodeID &ID) { 2059 Profile(ID, Context, getElementType(), 2060 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2061 } 2062 2063 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2064 QualType ET, ArraySizeModifier SizeMod, 2065 unsigned TypeQuals, Expr *E); 2066}; 2067 2068/// DependentSizedExtVectorType - This type represent an extended vector type 2069/// where either the type or size is dependent. For example: 2070/// @code 2071/// template<typename T, int Size> 2072/// class vector { 2073/// typedef T __attribute__((ext_vector_type(Size))) type; 2074/// } 2075/// @endcode 2076class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2077 const ASTContext &Context; 2078 Expr *SizeExpr; 2079 /// ElementType - The element type of the array. 2080 QualType ElementType; 2081 SourceLocation loc; 2082 2083 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2084 QualType can, Expr *SizeExpr, SourceLocation loc); 2085 2086 friend class ASTContext; 2087 2088public: 2089 Expr *getSizeExpr() const { return SizeExpr; } 2090 QualType getElementType() const { return ElementType; } 2091 SourceLocation getAttributeLoc() const { return loc; } 2092 2093 bool isSugared() const { return false; } 2094 QualType desugar() const { return QualType(this, 0); } 2095 2096 static bool classof(const Type *T) { 2097 return T->getTypeClass() == DependentSizedExtVector; 2098 } 2099 static bool classof(const DependentSizedExtVectorType *) { return true; } 2100 2101 void Profile(llvm::FoldingSetNodeID &ID) { 2102 Profile(ID, Context, getElementType(), getSizeExpr()); 2103 } 2104 2105 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2106 QualType ElementType, Expr *SizeExpr); 2107}; 2108 2109 2110/// VectorType - GCC generic vector type. This type is created using 2111/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2112/// bytes; or from an Altivec __vector or vector declaration. 2113/// Since the constructor takes the number of vector elements, the 2114/// client is responsible for converting the size into the number of elements. 2115class VectorType : public Type, public llvm::FoldingSetNode { 2116public: 2117 enum VectorKind { 2118 GenericVector, // not a target-specific vector type 2119 AltiVecVector, // is AltiVec vector 2120 AltiVecPixel, // is AltiVec 'vector Pixel' 2121 AltiVecBool, // is AltiVec 'vector bool ...' 2122 NeonVector, // is ARM Neon vector 2123 NeonPolyVector // is ARM Neon polynomial vector 2124 }; 2125protected: 2126 /// ElementType - The element type of the vector. 2127 QualType ElementType; 2128 2129 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2130 VectorKind vecKind); 2131 2132 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2133 QualType canonType, VectorKind vecKind); 2134 2135 friend class ASTContext; // ASTContext creates these. 2136 2137public: 2138 2139 QualType getElementType() const { return ElementType; } 2140 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2141 2142 bool isSugared() const { return false; } 2143 QualType desugar() const { return QualType(this, 0); } 2144 2145 VectorKind getVectorKind() const { 2146 return VectorKind(VectorTypeBits.VecKind); 2147 } 2148 2149 void Profile(llvm::FoldingSetNodeID &ID) { 2150 Profile(ID, getElementType(), getNumElements(), 2151 getTypeClass(), getVectorKind()); 2152 } 2153 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2154 unsigned NumElements, TypeClass TypeClass, 2155 VectorKind VecKind) { 2156 ID.AddPointer(ElementType.getAsOpaquePtr()); 2157 ID.AddInteger(NumElements); 2158 ID.AddInteger(TypeClass); 2159 ID.AddInteger(VecKind); 2160 } 2161 2162 static bool classof(const Type *T) { 2163 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2164 } 2165 static bool classof(const VectorType *) { return true; } 2166}; 2167 2168/// ExtVectorType - Extended vector type. This type is created using 2169/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2170/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2171/// class enables syntactic extensions, like Vector Components for accessing 2172/// points, colors, and textures (modeled after OpenGL Shading Language). 2173class ExtVectorType : public VectorType { 2174 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2175 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2176 friend class ASTContext; // ASTContext creates these. 2177public: 2178 static int getPointAccessorIdx(char c) { 2179 switch (c) { 2180 default: return -1; 2181 case 'x': return 0; 2182 case 'y': return 1; 2183 case 'z': return 2; 2184 case 'w': return 3; 2185 } 2186 } 2187 static int getNumericAccessorIdx(char c) { 2188 switch (c) { 2189 default: return -1; 2190 case '0': return 0; 2191 case '1': return 1; 2192 case '2': return 2; 2193 case '3': return 3; 2194 case '4': return 4; 2195 case '5': return 5; 2196 case '6': return 6; 2197 case '7': return 7; 2198 case '8': return 8; 2199 case '9': return 9; 2200 case 'A': 2201 case 'a': return 10; 2202 case 'B': 2203 case 'b': return 11; 2204 case 'C': 2205 case 'c': return 12; 2206 case 'D': 2207 case 'd': return 13; 2208 case 'E': 2209 case 'e': return 14; 2210 case 'F': 2211 case 'f': return 15; 2212 } 2213 } 2214 2215 static int getAccessorIdx(char c) { 2216 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2217 return getNumericAccessorIdx(c); 2218 } 2219 2220 bool isAccessorWithinNumElements(char c) const { 2221 if (int idx = getAccessorIdx(c)+1) 2222 return unsigned(idx-1) < getNumElements(); 2223 return false; 2224 } 2225 bool isSugared() const { return false; } 2226 QualType desugar() const { return QualType(this, 0); } 2227 2228 static bool classof(const Type *T) { 2229 return T->getTypeClass() == ExtVector; 2230 } 2231 static bool classof(const ExtVectorType *) { return true; } 2232}; 2233 2234/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2235/// class of FunctionNoProtoType and FunctionProtoType. 2236/// 2237class FunctionType : public Type { 2238 // The type returned by the function. 2239 QualType ResultType; 2240 2241 public: 2242 /// ExtInfo - A class which abstracts out some details necessary for 2243 /// making a call. 2244 /// 2245 /// It is not actually used directly for storing this information in 2246 /// a FunctionType, although FunctionType does currently use the 2247 /// same bit-pattern. 2248 /// 2249 // If you add a field (say Foo), other than the obvious places (both, 2250 // constructors, compile failures), what you need to update is 2251 // * Operator== 2252 // * getFoo 2253 // * withFoo 2254 // * functionType. Add Foo, getFoo. 2255 // * ASTContext::getFooType 2256 // * ASTContext::mergeFunctionTypes 2257 // * FunctionNoProtoType::Profile 2258 // * FunctionProtoType::Profile 2259 // * TypePrinter::PrintFunctionProto 2260 // * AST read and write 2261 // * Codegen 2262 class ExtInfo { 2263 // Feel free to rearrange or add bits, but if you go over 8, 2264 // you'll need to adjust both the Bits field below and 2265 // Type::FunctionTypeBitfields. 2266 2267 // | CC |noreturn|regparm 2268 // |0 .. 2| 3 |4 .. 6 2269 enum { CallConvMask = 0x7 }; 2270 enum { NoReturnMask = 0x8 }; 2271 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2272 RegParmOffset = 4 }; 2273 2274 unsigned char Bits; 2275 2276 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2277 2278 friend class FunctionType; 2279 2280 public: 2281 // Constructor with no defaults. Use this when you know that you 2282 // have all the elements (when reading an AST file for example). 2283 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2284 Bits = ((unsigned) cc) | 2285 (noReturn ? NoReturnMask : 0) | 2286 (regParm << RegParmOffset); 2287 } 2288 2289 // Constructor with all defaults. Use when for example creating a 2290 // function know to use defaults. 2291 ExtInfo() : Bits(0) {} 2292 2293 bool getNoReturn() const { return Bits & NoReturnMask; } 2294 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2295 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2296 2297 bool operator==(ExtInfo Other) const { 2298 return Bits == Other.Bits; 2299 } 2300 bool operator!=(ExtInfo Other) const { 2301 return Bits != Other.Bits; 2302 } 2303 2304 // Note that we don't have setters. That is by design, use 2305 // the following with methods instead of mutating these objects. 2306 2307 ExtInfo withNoReturn(bool noReturn) const { 2308 if (noReturn) 2309 return ExtInfo(Bits | NoReturnMask); 2310 else 2311 return ExtInfo(Bits & ~NoReturnMask); 2312 } 2313 2314 ExtInfo withRegParm(unsigned RegParm) const { 2315 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2316 } 2317 2318 ExtInfo withCallingConv(CallingConv cc) const { 2319 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2320 } 2321 2322 void Profile(llvm::FoldingSetNodeID &ID) const { 2323 ID.AddInteger(Bits); 2324 } 2325 }; 2326 2327protected: 2328 FunctionType(TypeClass tc, QualType res, bool variadic, 2329 unsigned typeQuals, RefQualifierKind RefQualifier, 2330 QualType Canonical, bool Dependent, 2331 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2332 ExtInfo Info) 2333 : Type(tc, Canonical, Dependent, VariablyModified, 2334 ContainsUnexpandedParameterPack), 2335 ResultType(res) { 2336 FunctionTypeBits.ExtInfo = Info.Bits; 2337 FunctionTypeBits.Variadic = variadic; 2338 FunctionTypeBits.TypeQuals = typeQuals; 2339 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2340 } 2341 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2342 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2343 2344 RefQualifierKind getRefQualifier() const { 2345 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2346 } 2347 2348public: 2349 2350 QualType getResultType() const { return ResultType; } 2351 2352 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2353 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2354 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2355 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2356 2357 /// \brief Determine the type of an expression that calls a function of 2358 /// this type. 2359 QualType getCallResultType(ASTContext &Context) const { 2360 return getResultType().getNonLValueExprType(Context); 2361 } 2362 2363 static llvm::StringRef getNameForCallConv(CallingConv CC); 2364 2365 static bool classof(const Type *T) { 2366 return T->getTypeClass() == FunctionNoProto || 2367 T->getTypeClass() == FunctionProto; 2368 } 2369 static bool classof(const FunctionType *) { return true; } 2370}; 2371 2372/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2373/// no information available about its arguments. 2374class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2375 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2376 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2377 /*Dependent=*/false, Result->isVariablyModifiedType(), 2378 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2379 2380 friend class ASTContext; // ASTContext creates these. 2381 2382public: 2383 // No additional state past what FunctionType provides. 2384 2385 bool isSugared() const { return false; } 2386 QualType desugar() const { return QualType(this, 0); } 2387 2388 void Profile(llvm::FoldingSetNodeID &ID) { 2389 Profile(ID, getResultType(), getExtInfo()); 2390 } 2391 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2392 ExtInfo Info) { 2393 Info.Profile(ID); 2394 ID.AddPointer(ResultType.getAsOpaquePtr()); 2395 } 2396 2397 static bool classof(const Type *T) { 2398 return T->getTypeClass() == FunctionNoProto; 2399 } 2400 static bool classof(const FunctionNoProtoType *) { return true; } 2401}; 2402 2403/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2404/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2405/// arguments, not as having a single void argument. Such a type can have an 2406/// exception specification, but this specification is not part of the canonical 2407/// type. 2408class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2409public: 2410 /// ExtProtoInfo - Extra information about a function prototype. 2411 struct ExtProtoInfo { 2412 ExtProtoInfo() : 2413 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2414 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0) {} 2415 2416 FunctionType::ExtInfo ExtInfo; 2417 bool Variadic; 2418 ExceptionSpecificationType ExceptionSpecType; 2419 unsigned char TypeQuals; 2420 RefQualifierKind RefQualifier; 2421 unsigned NumExceptions; 2422 const QualType *Exceptions; 2423 Expr *NoexceptExpr; 2424 }; 2425 2426private: 2427 /// \brief Determine whether there are any argument types that 2428 /// contain an unexpanded parameter pack. 2429 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2430 unsigned numArgs) { 2431 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2432 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2433 return true; 2434 2435 return false; 2436 } 2437 2438 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2439 QualType canonical, const ExtProtoInfo &epi); 2440 2441 /// NumArgs - The number of arguments this function has, not counting '...'. 2442 unsigned NumArgs : 20; 2443 2444 /// NumExceptions - The number of types in the exception spec, if any. 2445 unsigned NumExceptions : 9; 2446 2447 /// ExceptionSpecType - The type of exception specification this function has. 2448 unsigned ExceptionSpecType : 3; 2449 2450 /// ArgInfo - There is an variable size array after the class in memory that 2451 /// holds the argument types. 2452 2453 /// Exceptions - There is another variable size array after ArgInfo that 2454 /// holds the exception types. 2455 2456 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2457 /// to the expression in the noexcept() specifier. 2458 2459 friend class ASTContext; // ASTContext creates these. 2460 2461public: 2462 unsigned getNumArgs() const { return NumArgs; } 2463 QualType getArgType(unsigned i) const { 2464 assert(i < NumArgs && "Invalid argument number!"); 2465 return arg_type_begin()[i]; 2466 } 2467 2468 ExtProtoInfo getExtProtoInfo() const { 2469 ExtProtoInfo EPI; 2470 EPI.ExtInfo = getExtInfo(); 2471 EPI.Variadic = isVariadic(); 2472 EPI.ExceptionSpecType = getExceptionSpecType(); 2473 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2474 EPI.RefQualifier = getRefQualifier(); 2475 if (EPI.ExceptionSpecType == EST_Dynamic) { 2476 EPI.NumExceptions = NumExceptions; 2477 EPI.Exceptions = exception_begin(); 2478 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2479 EPI.NoexceptExpr = getNoexceptExpr(); 2480 } 2481 return EPI; 2482 } 2483 2484 /// \brief Get the kind of exception specification on this function. 2485 ExceptionSpecificationType getExceptionSpecType() const { 2486 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2487 } 2488 /// \brief Return whether this function has any kind of exception spec. 2489 bool hasExceptionSpec() const { 2490 return getExceptionSpecType() != EST_None; 2491 } 2492 /// \brief Return whether this function has a dynamic (throw) exception spec. 2493 bool hasDynamicExceptionSpec() const { 2494 return isDynamicExceptionSpec(getExceptionSpecType()); 2495 } 2496 /// \brief Return whther this function has a noexcept exception spec. 2497 bool hasNoexceptExceptionSpec() const { 2498 return isNoexceptExceptionSpec(getExceptionSpecType()); 2499 } 2500 /// \brief Result type of getNoexceptSpec(). 2501 enum NoexceptResult { 2502 NR_NoNoexcept, ///< There is no noexcept specifier. 2503 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2504 NR_Dependent, ///< The noexcept specifier is dependent. 2505 NR_Throw, ///< The noexcept specifier evaluates to false. 2506 NR_Nothrow ///< The noexcept specifier evaluates to true. 2507 }; 2508 /// \brief Get the meaning of the noexcept spec on this function, if any. 2509 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2510 unsigned getNumExceptions() const { return NumExceptions; } 2511 QualType getExceptionType(unsigned i) const { 2512 assert(i < NumExceptions && "Invalid exception number!"); 2513 return exception_begin()[i]; 2514 } 2515 Expr *getNoexceptExpr() const { 2516 if (getExceptionSpecType() != EST_ComputedNoexcept) 2517 return 0; 2518 // NoexceptExpr sits where the arguments end. 2519 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2520 } 2521 bool isNothrow(ASTContext &Ctx) const { 2522 ExceptionSpecificationType EST = getExceptionSpecType(); 2523 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2524 return true; 2525 if (EST != EST_ComputedNoexcept) 2526 return false; 2527 return getNoexceptSpec(Ctx) == NR_Nothrow; 2528 } 2529 2530 using FunctionType::isVariadic; 2531 2532 /// \brief Determines whether this function prototype contains a 2533 /// parameter pack at the end. 2534 /// 2535 /// A function template whose last parameter is a parameter pack can be 2536 /// called with an arbitrary number of arguments, much like a variadic 2537 /// function. However, 2538 bool isTemplateVariadic() const; 2539 2540 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2541 2542 2543 /// \brief Retrieve the ref-qualifier associated with this function type. 2544 RefQualifierKind getRefQualifier() const { 2545 return FunctionType::getRefQualifier(); 2546 } 2547 2548 typedef const QualType *arg_type_iterator; 2549 arg_type_iterator arg_type_begin() const { 2550 return reinterpret_cast<const QualType *>(this+1); 2551 } 2552 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2553 2554 typedef const QualType *exception_iterator; 2555 exception_iterator exception_begin() const { 2556 // exceptions begin where arguments end 2557 return arg_type_end(); 2558 } 2559 exception_iterator exception_end() const { 2560 if (getExceptionSpecType() != EST_Dynamic) 2561 return exception_begin(); 2562 return exception_begin() + NumExceptions; 2563 } 2564 2565 bool isSugared() const { return false; } 2566 QualType desugar() const { return QualType(this, 0); } 2567 2568 static bool classof(const Type *T) { 2569 return T->getTypeClass() == FunctionProto; 2570 } 2571 static bool classof(const FunctionProtoType *) { return true; } 2572 2573 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2574 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2575 arg_type_iterator ArgTys, unsigned NumArgs, 2576 const ExtProtoInfo &EPI, const ASTContext &Context); 2577}; 2578 2579 2580/// \brief Represents the dependent type named by a dependently-scoped 2581/// typename using declaration, e.g. 2582/// using typename Base<T>::foo; 2583/// Template instantiation turns these into the underlying type. 2584class UnresolvedUsingType : public Type { 2585 UnresolvedUsingTypenameDecl *Decl; 2586 2587 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2588 : Type(UnresolvedUsing, QualType(), true, false, 2589 /*ContainsUnexpandedParameterPack=*/false), 2590 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2591 friend class ASTContext; // ASTContext creates these. 2592public: 2593 2594 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2595 2596 bool isSugared() const { return false; } 2597 QualType desugar() const { return QualType(this, 0); } 2598 2599 static bool classof(const Type *T) { 2600 return T->getTypeClass() == UnresolvedUsing; 2601 } 2602 static bool classof(const UnresolvedUsingType *) { return true; } 2603 2604 void Profile(llvm::FoldingSetNodeID &ID) { 2605 return Profile(ID, Decl); 2606 } 2607 static void Profile(llvm::FoldingSetNodeID &ID, 2608 UnresolvedUsingTypenameDecl *D) { 2609 ID.AddPointer(D); 2610 } 2611}; 2612 2613 2614class TypedefType : public Type { 2615 TypedefDecl *Decl; 2616protected: 2617 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2618 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2619 /*ContainsUnexpandedParameterPack=*/false), 2620 Decl(const_cast<TypedefDecl*>(D)) { 2621 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2622 } 2623 friend class ASTContext; // ASTContext creates these. 2624public: 2625 2626 TypedefDecl *getDecl() const { return Decl; } 2627 2628 bool isSugared() const { return true; } 2629 QualType desugar() const; 2630 2631 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2632 static bool classof(const TypedefType *) { return true; } 2633}; 2634 2635/// TypeOfExprType (GCC extension). 2636class TypeOfExprType : public Type { 2637 Expr *TOExpr; 2638 2639protected: 2640 TypeOfExprType(Expr *E, QualType can = QualType()); 2641 friend class ASTContext; // ASTContext creates these. 2642public: 2643 Expr *getUnderlyingExpr() const { return TOExpr; } 2644 2645 /// \brief Remove a single level of sugar. 2646 QualType desugar() const; 2647 2648 /// \brief Returns whether this type directly provides sugar. 2649 bool isSugared() const { return true; } 2650 2651 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2652 static bool classof(const TypeOfExprType *) { return true; } 2653}; 2654 2655/// \brief Internal representation of canonical, dependent 2656/// typeof(expr) types. 2657/// 2658/// This class is used internally by the ASTContext to manage 2659/// canonical, dependent types, only. Clients will only see instances 2660/// of this class via TypeOfExprType nodes. 2661class DependentTypeOfExprType 2662 : public TypeOfExprType, public llvm::FoldingSetNode { 2663 const ASTContext &Context; 2664 2665public: 2666 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2667 : TypeOfExprType(E), Context(Context) { } 2668 2669 bool isSugared() const { return false; } 2670 QualType desugar() const { return QualType(this, 0); } 2671 2672 void Profile(llvm::FoldingSetNodeID &ID) { 2673 Profile(ID, Context, getUnderlyingExpr()); 2674 } 2675 2676 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2677 Expr *E); 2678}; 2679 2680/// TypeOfType (GCC extension). 2681class TypeOfType : public Type { 2682 QualType TOType; 2683 TypeOfType(QualType T, QualType can) 2684 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2685 T->containsUnexpandedParameterPack()), 2686 TOType(T) { 2687 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2688 } 2689 friend class ASTContext; // ASTContext creates these. 2690public: 2691 QualType getUnderlyingType() const { return TOType; } 2692 2693 /// \brief Remove a single level of sugar. 2694 QualType desugar() const { return getUnderlyingType(); } 2695 2696 /// \brief Returns whether this type directly provides sugar. 2697 bool isSugared() const { return true; } 2698 2699 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2700 static bool classof(const TypeOfType *) { return true; } 2701}; 2702 2703/// DecltypeType (C++0x) 2704class DecltypeType : public Type { 2705 Expr *E; 2706 2707 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2708 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2709 // from it. 2710 QualType UnderlyingType; 2711 2712protected: 2713 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2714 friend class ASTContext; // ASTContext creates these. 2715public: 2716 Expr *getUnderlyingExpr() const { return E; } 2717 QualType getUnderlyingType() const { return UnderlyingType; } 2718 2719 /// \brief Remove a single level of sugar. 2720 QualType desugar() const { return getUnderlyingType(); } 2721 2722 /// \brief Returns whether this type directly provides sugar. 2723 bool isSugared() const { return !isDependentType(); } 2724 2725 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2726 static bool classof(const DecltypeType *) { return true; } 2727}; 2728 2729/// \brief Internal representation of canonical, dependent 2730/// decltype(expr) types. 2731/// 2732/// This class is used internally by the ASTContext to manage 2733/// canonical, dependent types, only. Clients will only see instances 2734/// of this class via DecltypeType nodes. 2735class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2736 const ASTContext &Context; 2737 2738public: 2739 DependentDecltypeType(const ASTContext &Context, Expr *E); 2740 2741 bool isSugared() const { return false; } 2742 QualType desugar() const { return QualType(this, 0); } 2743 2744 void Profile(llvm::FoldingSetNodeID &ID) { 2745 Profile(ID, Context, getUnderlyingExpr()); 2746 } 2747 2748 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2749 Expr *E); 2750}; 2751 2752class TagType : public Type { 2753 /// Stores the TagDecl associated with this type. The decl may point to any 2754 /// TagDecl that declares the entity. 2755 TagDecl * decl; 2756 2757protected: 2758 TagType(TypeClass TC, const TagDecl *D, QualType can); 2759 2760public: 2761 TagDecl *getDecl() const; 2762 2763 /// @brief Determines whether this type is in the process of being 2764 /// defined. 2765 bool isBeingDefined() const; 2766 2767 static bool classof(const Type *T) { 2768 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2769 } 2770 static bool classof(const TagType *) { return true; } 2771 static bool classof(const RecordType *) { return true; } 2772 static bool classof(const EnumType *) { return true; } 2773}; 2774 2775/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2776/// to detect TagType objects of structs/unions/classes. 2777class RecordType : public TagType { 2778protected: 2779 explicit RecordType(const RecordDecl *D) 2780 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2781 explicit RecordType(TypeClass TC, RecordDecl *D) 2782 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2783 friend class ASTContext; // ASTContext creates these. 2784public: 2785 2786 RecordDecl *getDecl() const { 2787 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2788 } 2789 2790 // FIXME: This predicate is a helper to QualType/Type. It needs to 2791 // recursively check all fields for const-ness. If any field is declared 2792 // const, it needs to return false. 2793 bool hasConstFields() const { return false; } 2794 2795 bool isSugared() const { return false; } 2796 QualType desugar() const { return QualType(this, 0); } 2797 2798 static bool classof(const TagType *T); 2799 static bool classof(const Type *T) { 2800 return isa<TagType>(T) && classof(cast<TagType>(T)); 2801 } 2802 static bool classof(const RecordType *) { return true; } 2803}; 2804 2805/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2806/// to detect TagType objects of enums. 2807class EnumType : public TagType { 2808 explicit EnumType(const EnumDecl *D) 2809 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2810 friend class ASTContext; // ASTContext creates these. 2811public: 2812 2813 EnumDecl *getDecl() const { 2814 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2815 } 2816 2817 bool isSugared() const { return false; } 2818 QualType desugar() const { return QualType(this, 0); } 2819 2820 static bool classof(const TagType *T); 2821 static bool classof(const Type *T) { 2822 return isa<TagType>(T) && classof(cast<TagType>(T)); 2823 } 2824 static bool classof(const EnumType *) { return true; } 2825}; 2826 2827/// AttributedType - An attributed type is a type to which a type 2828/// attribute has been applied. The "modified type" is the 2829/// fully-sugared type to which the attributed type was applied; 2830/// generally it is not canonically equivalent to the attributed type. 2831/// The "equivalent type" is the minimally-desugared type which the 2832/// type is canonically equivalent to. 2833/// 2834/// For example, in the following attributed type: 2835/// int32_t __attribute__((vector_size(16))) 2836/// - the modified type is the TypedefType for int32_t 2837/// - the equivalent type is VectorType(16, int32_t) 2838/// - the canonical type is VectorType(16, int) 2839class AttributedType : public Type, public llvm::FoldingSetNode { 2840public: 2841 // It is really silly to have yet another attribute-kind enum, but 2842 // clang::attr::Kind doesn't currently cover the pure type attrs. 2843 enum Kind { 2844 // Expression operand. 2845 attr_address_space, 2846 attr_regparm, 2847 attr_vector_size, 2848 attr_neon_vector_type, 2849 attr_neon_polyvector_type, 2850 2851 FirstExprOperandKind = attr_address_space, 2852 LastExprOperandKind = attr_neon_polyvector_type, 2853 2854 // Enumerated operand (string or keyword). 2855 attr_objc_gc, 2856 2857 FirstEnumOperandKind = attr_objc_gc, 2858 LastEnumOperandKind = attr_objc_gc, 2859 2860 // No operand. 2861 attr_noreturn, 2862 attr_cdecl, 2863 attr_fastcall, 2864 attr_stdcall, 2865 attr_thiscall, 2866 attr_pascal 2867 }; 2868 2869private: 2870 QualType ModifiedType; 2871 QualType EquivalentType; 2872 2873 friend class ASTContext; // creates these 2874 2875 AttributedType(QualType canon, Kind attrKind, 2876 QualType modified, QualType equivalent) 2877 : Type(Attributed, canon, canon->isDependentType(), 2878 canon->isVariablyModifiedType(), 2879 canon->containsUnexpandedParameterPack()), 2880 ModifiedType(modified), EquivalentType(equivalent) { 2881 AttributedTypeBits.AttrKind = attrKind; 2882 } 2883 2884public: 2885 Kind getAttrKind() const { 2886 return static_cast<Kind>(AttributedTypeBits.AttrKind); 2887 } 2888 2889 QualType getModifiedType() const { return ModifiedType; } 2890 QualType getEquivalentType() const { return EquivalentType; } 2891 2892 bool isSugared() const { return true; } 2893 QualType desugar() const { return getEquivalentType(); } 2894 2895 void Profile(llvm::FoldingSetNodeID &ID) { 2896 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 2897 } 2898 2899 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 2900 QualType modified, QualType equivalent) { 2901 ID.AddInteger(attrKind); 2902 ID.AddPointer(modified.getAsOpaquePtr()); 2903 ID.AddPointer(equivalent.getAsOpaquePtr()); 2904 } 2905 2906 static bool classof(const Type *T) { 2907 return T->getTypeClass() == Attributed; 2908 } 2909 static bool classof(const AttributedType *T) { return true; } 2910}; 2911 2912class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2913 unsigned Depth : 15; 2914 unsigned ParameterPack : 1; 2915 unsigned Index : 16; 2916 IdentifierInfo *Name; 2917 2918 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2919 QualType Canon) 2920 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2921 /*VariablyModified=*/false, PP), 2922 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2923 2924 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2925 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2926 /*VariablyModified=*/false, PP), 2927 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2928 2929 friend class ASTContext; // ASTContext creates these 2930 2931public: 2932 unsigned getDepth() const { return Depth; } 2933 unsigned getIndex() const { return Index; } 2934 bool isParameterPack() const { return ParameterPack; } 2935 IdentifierInfo *getName() const { return Name; } 2936 2937 bool isSugared() const { return false; } 2938 QualType desugar() const { return QualType(this, 0); } 2939 2940 void Profile(llvm::FoldingSetNodeID &ID) { 2941 Profile(ID, Depth, Index, ParameterPack, Name); 2942 } 2943 2944 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2945 unsigned Index, bool ParameterPack, 2946 IdentifierInfo *Name) { 2947 ID.AddInteger(Depth); 2948 ID.AddInteger(Index); 2949 ID.AddBoolean(ParameterPack); 2950 ID.AddPointer(Name); 2951 } 2952 2953 static bool classof(const Type *T) { 2954 return T->getTypeClass() == TemplateTypeParm; 2955 } 2956 static bool classof(const TemplateTypeParmType *T) { return true; } 2957}; 2958 2959/// \brief Represents the result of substituting a type for a template 2960/// type parameter. 2961/// 2962/// Within an instantiated template, all template type parameters have 2963/// been replaced with these. They are used solely to record that a 2964/// type was originally written as a template type parameter; 2965/// therefore they are never canonical. 2966class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2967 // The original type parameter. 2968 const TemplateTypeParmType *Replaced; 2969 2970 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2971 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2972 Canon->isVariablyModifiedType(), 2973 Canon->containsUnexpandedParameterPack()), 2974 Replaced(Param) { } 2975 2976 friend class ASTContext; 2977 2978public: 2979 IdentifierInfo *getName() const { return Replaced->getName(); } 2980 2981 /// Gets the template parameter that was substituted for. 2982 const TemplateTypeParmType *getReplacedParameter() const { 2983 return Replaced; 2984 } 2985 2986 /// Gets the type that was substituted for the template 2987 /// parameter. 2988 QualType getReplacementType() const { 2989 return getCanonicalTypeInternal(); 2990 } 2991 2992 bool isSugared() const { return true; } 2993 QualType desugar() const { return getReplacementType(); } 2994 2995 void Profile(llvm::FoldingSetNodeID &ID) { 2996 Profile(ID, getReplacedParameter(), getReplacementType()); 2997 } 2998 static void Profile(llvm::FoldingSetNodeID &ID, 2999 const TemplateTypeParmType *Replaced, 3000 QualType Replacement) { 3001 ID.AddPointer(Replaced); 3002 ID.AddPointer(Replacement.getAsOpaquePtr()); 3003 } 3004 3005 static bool classof(const Type *T) { 3006 return T->getTypeClass() == SubstTemplateTypeParm; 3007 } 3008 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3009}; 3010 3011/// \brief Represents the result of substituting a set of types for a template 3012/// type parameter pack. 3013/// 3014/// When a pack expansion in the source code contains multiple parameter packs 3015/// and those parameter packs correspond to different levels of template 3016/// parameter lists, this type node is used to represent a template type 3017/// parameter pack from an outer level, which has already had its argument pack 3018/// substituted but that still lives within a pack expansion that itself 3019/// could not be instantiated. When actually performing a substitution into 3020/// that pack expansion (e.g., when all template parameters have corresponding 3021/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3022/// at the current pack substitution index. 3023class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3024 /// \brief The original type parameter. 3025 const TemplateTypeParmType *Replaced; 3026 3027 /// \brief A pointer to the set of template arguments that this 3028 /// parameter pack is instantiated with. 3029 const TemplateArgument *Arguments; 3030 3031 /// \brief The number of template arguments in \c Arguments. 3032 unsigned NumArguments; 3033 3034 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3035 QualType Canon, 3036 const TemplateArgument &ArgPack); 3037 3038 friend class ASTContext; 3039 3040public: 3041 IdentifierInfo *getName() const { return Replaced->getName(); } 3042 3043 /// Gets the template parameter that was substituted for. 3044 const TemplateTypeParmType *getReplacedParameter() const { 3045 return Replaced; 3046 } 3047 3048 bool isSugared() const { return false; } 3049 QualType desugar() const { return QualType(this, 0); } 3050 3051 TemplateArgument getArgumentPack() const; 3052 3053 void Profile(llvm::FoldingSetNodeID &ID); 3054 static void Profile(llvm::FoldingSetNodeID &ID, 3055 const TemplateTypeParmType *Replaced, 3056 const TemplateArgument &ArgPack); 3057 3058 static bool classof(const Type *T) { 3059 return T->getTypeClass() == SubstTemplateTypeParmPack; 3060 } 3061 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3062}; 3063 3064/// \brief Represents a C++0x auto type. 3065/// 3066/// These types are usually a placeholder for a deduced type. However, within 3067/// templates and before the initializer is attached, there is no deduced type 3068/// and an auto type is type-dependent and canonical. 3069class AutoType : public Type, public llvm::FoldingSetNode { 3070 AutoType(QualType DeducedType) 3071 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3072 /*Dependent=*/DeducedType.isNull(), 3073 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3074 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3075 "deduced a dependent type for auto"); 3076 } 3077 3078 friend class ASTContext; // ASTContext creates these 3079 3080public: 3081 bool isSugared() const { return isDeduced(); } 3082 QualType desugar() const { return getCanonicalTypeInternal(); } 3083 3084 QualType getDeducedType() const { 3085 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3086 } 3087 bool isDeduced() const { 3088 return !isDependentType(); 3089 } 3090 3091 void Profile(llvm::FoldingSetNodeID &ID) { 3092 Profile(ID, getDeducedType()); 3093 } 3094 3095 static void Profile(llvm::FoldingSetNodeID &ID, 3096 QualType Deduced) { 3097 ID.AddPointer(Deduced.getAsOpaquePtr()); 3098 } 3099 3100 static bool classof(const Type *T) { 3101 return T->getTypeClass() == Auto; 3102 } 3103 static bool classof(const AutoType *T) { return true; } 3104}; 3105 3106/// \brief Represents the type of a template specialization as written 3107/// in the source code. 3108/// 3109/// Template specialization types represent the syntactic form of a 3110/// template-id that refers to a type, e.g., @c vector<int>. Some 3111/// template specialization types are syntactic sugar, whose canonical 3112/// type will point to some other type node that represents the 3113/// instantiation or class template specialization. For example, a 3114/// class template specialization type of @c vector<int> will refer to 3115/// a tag type for the instantiation 3116/// @c std::vector<int, std::allocator<int>>. 3117/// 3118/// Other template specialization types, for which the template name 3119/// is dependent, may be canonical types. These types are always 3120/// dependent. 3121class TemplateSpecializationType 3122 : public Type, public llvm::FoldingSetNode { 3123 /// \brief The name of the template being specialized. 3124 TemplateName Template; 3125 3126 /// \brief - The number of template arguments named in this class 3127 /// template specialization. 3128 unsigned NumArgs; 3129 3130 TemplateSpecializationType(TemplateName T, 3131 const TemplateArgument *Args, 3132 unsigned NumArgs, QualType Canon); 3133 3134 friend class ASTContext; // ASTContext creates these 3135 3136public: 3137 /// \brief Determine whether any of the given template arguments are 3138 /// dependent. 3139 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3140 unsigned NumArgs); 3141 3142 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3143 unsigned NumArgs); 3144 3145 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 3146 3147 /// \brief Print a template argument list, including the '<' and '>' 3148 /// enclosing the template arguments. 3149 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3150 unsigned NumArgs, 3151 const PrintingPolicy &Policy, 3152 bool SkipBrackets = false); 3153 3154 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3155 unsigned NumArgs, 3156 const PrintingPolicy &Policy); 3157 3158 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3159 const PrintingPolicy &Policy); 3160 3161 /// True if this template specialization type matches a current 3162 /// instantiation in the context in which it is found. 3163 bool isCurrentInstantiation() const { 3164 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3165 } 3166 3167 typedef const TemplateArgument * iterator; 3168 3169 iterator begin() const { return getArgs(); } 3170 iterator end() const; // defined inline in TemplateBase.h 3171 3172 /// \brief Retrieve the name of the template that we are specializing. 3173 TemplateName getTemplateName() const { return Template; } 3174 3175 /// \brief Retrieve the template arguments. 3176 const TemplateArgument *getArgs() const { 3177 return reinterpret_cast<const TemplateArgument *>(this + 1); 3178 } 3179 3180 /// \brief Retrieve the number of template arguments. 3181 unsigned getNumArgs() const { return NumArgs; } 3182 3183 /// \brief Retrieve a specific template argument as a type. 3184 /// \precondition @c isArgType(Arg) 3185 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3186 3187 bool isSugared() const { 3188 return !isDependentType() || isCurrentInstantiation(); 3189 } 3190 QualType desugar() const { return getCanonicalTypeInternal(); } 3191 3192 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3193 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3194 } 3195 3196 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3197 const TemplateArgument *Args, 3198 unsigned NumArgs, 3199 const ASTContext &Context); 3200 3201 static bool classof(const Type *T) { 3202 return T->getTypeClass() == TemplateSpecialization; 3203 } 3204 static bool classof(const TemplateSpecializationType *T) { return true; } 3205}; 3206 3207/// \brief The injected class name of a C++ class template or class 3208/// template partial specialization. Used to record that a type was 3209/// spelled with a bare identifier rather than as a template-id; the 3210/// equivalent for non-templated classes is just RecordType. 3211/// 3212/// Injected class name types are always dependent. Template 3213/// instantiation turns these into RecordTypes. 3214/// 3215/// Injected class name types are always canonical. This works 3216/// because it is impossible to compare an injected class name type 3217/// with the corresponding non-injected template type, for the same 3218/// reason that it is impossible to directly compare template 3219/// parameters from different dependent contexts: injected class name 3220/// types can only occur within the scope of a particular templated 3221/// declaration, and within that scope every template specialization 3222/// will canonicalize to the injected class name (when appropriate 3223/// according to the rules of the language). 3224class InjectedClassNameType : public Type { 3225 CXXRecordDecl *Decl; 3226 3227 /// The template specialization which this type represents. 3228 /// For example, in 3229 /// template <class T> class A { ... }; 3230 /// this is A<T>, whereas in 3231 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3232 /// this is A<B<X,Y> >. 3233 /// 3234 /// It is always unqualified, always a template specialization type, 3235 /// and always dependent. 3236 QualType InjectedType; 3237 3238 friend class ASTContext; // ASTContext creates these. 3239 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3240 // currently suitable for AST reading, too much 3241 // interdependencies. 3242 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3243 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3244 /*VariablyModified=*/false, 3245 /*ContainsUnexpandedParameterPack=*/false), 3246 Decl(D), InjectedType(TST) { 3247 assert(isa<TemplateSpecializationType>(TST)); 3248 assert(!TST.hasQualifiers()); 3249 assert(TST->isDependentType()); 3250 } 3251 3252public: 3253 QualType getInjectedSpecializationType() const { return InjectedType; } 3254 const TemplateSpecializationType *getInjectedTST() const { 3255 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3256 } 3257 3258 CXXRecordDecl *getDecl() const; 3259 3260 bool isSugared() const { return false; } 3261 QualType desugar() const { return QualType(this, 0); } 3262 3263 static bool classof(const Type *T) { 3264 return T->getTypeClass() == InjectedClassName; 3265 } 3266 static bool classof(const InjectedClassNameType *T) { return true; } 3267}; 3268 3269/// \brief The kind of a tag type. 3270enum TagTypeKind { 3271 /// \brief The "struct" keyword. 3272 TTK_Struct, 3273 /// \brief The "union" keyword. 3274 TTK_Union, 3275 /// \brief The "class" keyword. 3276 TTK_Class, 3277 /// \brief The "enum" keyword. 3278 TTK_Enum 3279}; 3280 3281/// \brief The elaboration keyword that precedes a qualified type name or 3282/// introduces an elaborated-type-specifier. 3283enum ElaboratedTypeKeyword { 3284 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3285 ETK_Struct, 3286 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3287 ETK_Union, 3288 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3289 ETK_Class, 3290 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3291 ETK_Enum, 3292 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3293 /// \c typename T::type. 3294 ETK_Typename, 3295 /// \brief No keyword precedes the qualified type name. 3296 ETK_None 3297}; 3298 3299/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3300/// The keyword in stored in the free bits of the base class. 3301/// Also provides a few static helpers for converting and printing 3302/// elaborated type keyword and tag type kind enumerations. 3303class TypeWithKeyword : public Type { 3304protected: 3305 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3306 QualType Canonical, bool Dependent, bool VariablyModified, 3307 bool ContainsUnexpandedParameterPack) 3308 : Type(tc, Canonical, Dependent, VariablyModified, 3309 ContainsUnexpandedParameterPack) { 3310 TypeWithKeywordBits.Keyword = Keyword; 3311 } 3312 3313public: 3314 ElaboratedTypeKeyword getKeyword() const { 3315 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3316 } 3317 3318 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3319 /// into an elaborated type keyword. 3320 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3321 3322 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3323 /// into a tag type kind. It is an error to provide a type specifier 3324 /// which *isn't* a tag kind here. 3325 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3326 3327 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3328 /// elaborated type keyword. 3329 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3330 3331 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3332 // a TagTypeKind. It is an error to provide an elaborated type keyword 3333 /// which *isn't* a tag kind here. 3334 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3335 3336 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3337 3338 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3339 3340 static const char *getTagTypeKindName(TagTypeKind Kind) { 3341 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3342 } 3343 3344 class CannotCastToThisType {}; 3345 static CannotCastToThisType classof(const Type *); 3346}; 3347 3348/// \brief Represents a type that was referred to using an elaborated type 3349/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3350/// or both. 3351/// 3352/// This type is used to keep track of a type name as written in the 3353/// source code, including tag keywords and any nested-name-specifiers. 3354/// The type itself is always "sugar", used to express what was written 3355/// in the source code but containing no additional semantic information. 3356class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3357 3358 /// \brief The nested name specifier containing the qualifier. 3359 NestedNameSpecifier *NNS; 3360 3361 /// \brief The type that this qualified name refers to. 3362 QualType NamedType; 3363 3364 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3365 QualType NamedType, QualType CanonType) 3366 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3367 NamedType->isDependentType(), 3368 NamedType->isVariablyModifiedType(), 3369 NamedType->containsUnexpandedParameterPack()), 3370 NNS(NNS), NamedType(NamedType) { 3371 assert(!(Keyword == ETK_None && NNS == 0) && 3372 "ElaboratedType cannot have elaborated type keyword " 3373 "and name qualifier both null."); 3374 } 3375 3376 friend class ASTContext; // ASTContext creates these 3377 3378public: 3379 ~ElaboratedType(); 3380 3381 /// \brief Retrieve the qualification on this type. 3382 NestedNameSpecifier *getQualifier() const { return NNS; } 3383 3384 /// \brief Retrieve the type named by the qualified-id. 3385 QualType getNamedType() const { return NamedType; } 3386 3387 /// \brief Remove a single level of sugar. 3388 QualType desugar() const { return getNamedType(); } 3389 3390 /// \brief Returns whether this type directly provides sugar. 3391 bool isSugared() const { return true; } 3392 3393 void Profile(llvm::FoldingSetNodeID &ID) { 3394 Profile(ID, getKeyword(), NNS, NamedType); 3395 } 3396 3397 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3398 NestedNameSpecifier *NNS, QualType NamedType) { 3399 ID.AddInteger(Keyword); 3400 ID.AddPointer(NNS); 3401 NamedType.Profile(ID); 3402 } 3403 3404 static bool classof(const Type *T) { 3405 return T->getTypeClass() == Elaborated; 3406 } 3407 static bool classof(const ElaboratedType *T) { return true; } 3408}; 3409 3410/// \brief Represents a qualified type name for which the type name is 3411/// dependent. 3412/// 3413/// DependentNameType represents a class of dependent types that involve a 3414/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3415/// name of a type. The DependentNameType may start with a "typename" (for a 3416/// typename-specifier), "class", "struct", "union", or "enum" (for a 3417/// dependent elaborated-type-specifier), or nothing (in contexts where we 3418/// know that we must be referring to a type, e.g., in a base class specifier). 3419class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3420 3421 /// \brief The nested name specifier containing the qualifier. 3422 NestedNameSpecifier *NNS; 3423 3424 /// \brief The type that this typename specifier refers to. 3425 const IdentifierInfo *Name; 3426 3427 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3428 const IdentifierInfo *Name, QualType CanonType) 3429 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3430 /*VariablyModified=*/false, 3431 NNS->containsUnexpandedParameterPack()), 3432 NNS(NNS), Name(Name) { 3433 assert(NNS->isDependent() && 3434 "DependentNameType requires a dependent nested-name-specifier"); 3435 } 3436 3437 friend class ASTContext; // ASTContext creates these 3438 3439public: 3440 /// \brief Retrieve the qualification on this type. 3441 NestedNameSpecifier *getQualifier() const { return NNS; } 3442 3443 /// \brief Retrieve the type named by the typename specifier as an 3444 /// identifier. 3445 /// 3446 /// This routine will return a non-NULL identifier pointer when the 3447 /// form of the original typename was terminated by an identifier, 3448 /// e.g., "typename T::type". 3449 const IdentifierInfo *getIdentifier() const { 3450 return Name; 3451 } 3452 3453 bool isSugared() const { return false; } 3454 QualType desugar() const { return QualType(this, 0); } 3455 3456 void Profile(llvm::FoldingSetNodeID &ID) { 3457 Profile(ID, getKeyword(), NNS, Name); 3458 } 3459 3460 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3461 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3462 ID.AddInteger(Keyword); 3463 ID.AddPointer(NNS); 3464 ID.AddPointer(Name); 3465 } 3466 3467 static bool classof(const Type *T) { 3468 return T->getTypeClass() == DependentName; 3469 } 3470 static bool classof(const DependentNameType *T) { return true; } 3471}; 3472 3473/// DependentTemplateSpecializationType - Represents a template 3474/// specialization type whose template cannot be resolved, e.g. 3475/// A<T>::template B<T> 3476class DependentTemplateSpecializationType : 3477 public TypeWithKeyword, public llvm::FoldingSetNode { 3478 3479 /// \brief The nested name specifier containing the qualifier. 3480 NestedNameSpecifier *NNS; 3481 3482 /// \brief The identifier of the template. 3483 const IdentifierInfo *Name; 3484 3485 /// \brief - The number of template arguments named in this class 3486 /// template specialization. 3487 unsigned NumArgs; 3488 3489 const TemplateArgument *getArgBuffer() const { 3490 return reinterpret_cast<const TemplateArgument*>(this+1); 3491 } 3492 TemplateArgument *getArgBuffer() { 3493 return reinterpret_cast<TemplateArgument*>(this+1); 3494 } 3495 3496 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3497 NestedNameSpecifier *NNS, 3498 const IdentifierInfo *Name, 3499 unsigned NumArgs, 3500 const TemplateArgument *Args, 3501 QualType Canon); 3502 3503 friend class ASTContext; // ASTContext creates these 3504 3505public: 3506 NestedNameSpecifier *getQualifier() const { return NNS; } 3507 const IdentifierInfo *getIdentifier() const { return Name; } 3508 3509 /// \brief Retrieve the template arguments. 3510 const TemplateArgument *getArgs() const { 3511 return getArgBuffer(); 3512 } 3513 3514 /// \brief Retrieve the number of template arguments. 3515 unsigned getNumArgs() const { return NumArgs; } 3516 3517 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3518 3519 typedef const TemplateArgument * iterator; 3520 iterator begin() const { return getArgs(); } 3521 iterator end() const; // inline in TemplateBase.h 3522 3523 bool isSugared() const { return false; } 3524 QualType desugar() const { return QualType(this, 0); } 3525 3526 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3527 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3528 } 3529 3530 static void Profile(llvm::FoldingSetNodeID &ID, 3531 const ASTContext &Context, 3532 ElaboratedTypeKeyword Keyword, 3533 NestedNameSpecifier *Qualifier, 3534 const IdentifierInfo *Name, 3535 unsigned NumArgs, 3536 const TemplateArgument *Args); 3537 3538 static bool classof(const Type *T) { 3539 return T->getTypeClass() == DependentTemplateSpecialization; 3540 } 3541 static bool classof(const DependentTemplateSpecializationType *T) { 3542 return true; 3543 } 3544}; 3545 3546/// \brief Represents a pack expansion of types. 3547/// 3548/// Pack expansions are part of C++0x variadic templates. A pack 3549/// expansion contains a pattern, which itself contains one or more 3550/// "unexpanded" parameter packs. When instantiated, a pack expansion 3551/// produces a series of types, each instantiated from the pattern of 3552/// the expansion, where the Ith instantiation of the pattern uses the 3553/// Ith arguments bound to each of the unexpanded parameter packs. The 3554/// pack expansion is considered to "expand" these unexpanded 3555/// parameter packs. 3556/// 3557/// \code 3558/// template<typename ...Types> struct tuple; 3559/// 3560/// template<typename ...Types> 3561/// struct tuple_of_references { 3562/// typedef tuple<Types&...> type; 3563/// }; 3564/// \endcode 3565/// 3566/// Here, the pack expansion \c Types&... is represented via a 3567/// PackExpansionType whose pattern is Types&. 3568class PackExpansionType : public Type, public llvm::FoldingSetNode { 3569 /// \brief The pattern of the pack expansion. 3570 QualType Pattern; 3571 3572 /// \brief The number of expansions that this pack expansion will 3573 /// generate when substituted (+1), or indicates that 3574 /// 3575 /// This field will only have a non-zero value when some of the parameter 3576 /// packs that occur within the pattern have been substituted but others have 3577 /// not. 3578 unsigned NumExpansions; 3579 3580 PackExpansionType(QualType Pattern, QualType Canon, 3581 llvm::Optional<unsigned> NumExpansions) 3582 : Type(PackExpansion, Canon, /*Dependent=*/true, 3583 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3584 /*ContainsUnexpandedParameterPack=*/false), 3585 Pattern(Pattern), 3586 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3587 3588 friend class ASTContext; // ASTContext creates these 3589 3590public: 3591 /// \brief Retrieve the pattern of this pack expansion, which is the 3592 /// type that will be repeatedly instantiated when instantiating the 3593 /// pack expansion itself. 3594 QualType getPattern() const { return Pattern; } 3595 3596 /// \brief Retrieve the number of expansions that this pack expansion will 3597 /// generate, if known. 3598 llvm::Optional<unsigned> getNumExpansions() const { 3599 if (NumExpansions) 3600 return NumExpansions - 1; 3601 3602 return llvm::Optional<unsigned>(); 3603 } 3604 3605 bool isSugared() const { return false; } 3606 QualType desugar() const { return QualType(this, 0); } 3607 3608 void Profile(llvm::FoldingSetNodeID &ID) { 3609 Profile(ID, getPattern(), getNumExpansions()); 3610 } 3611 3612 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3613 llvm::Optional<unsigned> NumExpansions) { 3614 ID.AddPointer(Pattern.getAsOpaquePtr()); 3615 ID.AddBoolean(NumExpansions); 3616 if (NumExpansions) 3617 ID.AddInteger(*NumExpansions); 3618 } 3619 3620 static bool classof(const Type *T) { 3621 return T->getTypeClass() == PackExpansion; 3622 } 3623 static bool classof(const PackExpansionType *T) { 3624 return true; 3625 } 3626}; 3627 3628/// ObjCObjectType - Represents a class type in Objective C. 3629/// Every Objective C type is a combination of a base type and a 3630/// list of protocols. 3631/// 3632/// Given the following declarations: 3633/// @class C; 3634/// @protocol P; 3635/// 3636/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3637/// with base C and no protocols. 3638/// 3639/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3640/// 3641/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3642/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3643/// and no protocols. 3644/// 3645/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3646/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3647/// this should get its own sugar class to better represent the source. 3648class ObjCObjectType : public Type { 3649 // ObjCObjectType.NumProtocols - the number of protocols stored 3650 // after the ObjCObjectPointerType node. 3651 // 3652 // These protocols are those written directly on the type. If 3653 // protocol qualifiers ever become additive, the iterators will need 3654 // to get kindof complicated. 3655 // 3656 // In the canonical object type, these are sorted alphabetically 3657 // and uniqued. 3658 3659 /// Either a BuiltinType or an InterfaceType or sugar for either. 3660 QualType BaseType; 3661 3662 ObjCProtocolDecl * const *getProtocolStorage() const { 3663 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3664 } 3665 3666 ObjCProtocolDecl **getProtocolStorage(); 3667 3668protected: 3669 ObjCObjectType(QualType Canonical, QualType Base, 3670 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3671 3672 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3673 ObjCObjectType(enum Nonce_ObjCInterface) 3674 : Type(ObjCInterface, QualType(), false, false, false), 3675 BaseType(QualType(this_(), 0)) { 3676 ObjCObjectTypeBits.NumProtocols = 0; 3677 } 3678 3679public: 3680 /// getBaseType - Gets the base type of this object type. This is 3681 /// always (possibly sugar for) one of: 3682 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3683 /// user, which is a typedef for an ObjCPointerType) 3684 /// - the 'Class' builtin type (same caveat) 3685 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3686 QualType getBaseType() const { return BaseType; } 3687 3688 bool isObjCId() const { 3689 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3690 } 3691 bool isObjCClass() const { 3692 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3693 } 3694 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3695 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3696 bool isObjCUnqualifiedIdOrClass() const { 3697 if (!qual_empty()) return false; 3698 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3699 return T->getKind() == BuiltinType::ObjCId || 3700 T->getKind() == BuiltinType::ObjCClass; 3701 return false; 3702 } 3703 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3704 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3705 3706 /// Gets the interface declaration for this object type, if the base type 3707 /// really is an interface. 3708 ObjCInterfaceDecl *getInterface() const; 3709 3710 typedef ObjCProtocolDecl * const *qual_iterator; 3711 3712 qual_iterator qual_begin() const { return getProtocolStorage(); } 3713 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3714 3715 bool qual_empty() const { return getNumProtocols() == 0; } 3716 3717 /// getNumProtocols - Return the number of qualifying protocols in this 3718 /// interface type, or 0 if there are none. 3719 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3720 3721 /// \brief Fetch a protocol by index. 3722 ObjCProtocolDecl *getProtocol(unsigned I) const { 3723 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3724 return qual_begin()[I]; 3725 } 3726 3727 bool isSugared() const { return false; } 3728 QualType desugar() const { return QualType(this, 0); } 3729 3730 static bool classof(const Type *T) { 3731 return T->getTypeClass() == ObjCObject || 3732 T->getTypeClass() == ObjCInterface; 3733 } 3734 static bool classof(const ObjCObjectType *) { return true; } 3735}; 3736 3737/// ObjCObjectTypeImpl - A class providing a concrete implementation 3738/// of ObjCObjectType, so as to not increase the footprint of 3739/// ObjCInterfaceType. Code outside of ASTContext and the core type 3740/// system should not reference this type. 3741class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3742 friend class ASTContext; 3743 3744 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3745 // will need to be modified. 3746 3747 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3748 ObjCProtocolDecl * const *Protocols, 3749 unsigned NumProtocols) 3750 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3751 3752public: 3753 void Profile(llvm::FoldingSetNodeID &ID); 3754 static void Profile(llvm::FoldingSetNodeID &ID, 3755 QualType Base, 3756 ObjCProtocolDecl *const *protocols, 3757 unsigned NumProtocols); 3758}; 3759 3760inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3761 return reinterpret_cast<ObjCProtocolDecl**>( 3762 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3763} 3764 3765/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3766/// object oriented design. They basically correspond to C++ classes. There 3767/// are two kinds of interface types, normal interfaces like "NSString" and 3768/// qualified interfaces, which are qualified with a protocol list like 3769/// "NSString<NSCopyable, NSAmazing>". 3770/// 3771/// ObjCInterfaceType guarantees the following properties when considered 3772/// as a subtype of its superclass, ObjCObjectType: 3773/// - There are no protocol qualifiers. To reinforce this, code which 3774/// tries to invoke the protocol methods via an ObjCInterfaceType will 3775/// fail to compile. 3776/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3777/// T->getBaseType() == QualType(T, 0). 3778class ObjCInterfaceType : public ObjCObjectType { 3779 ObjCInterfaceDecl *Decl; 3780 3781 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3782 : ObjCObjectType(Nonce_ObjCInterface), 3783 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3784 friend class ASTContext; // ASTContext creates these. 3785 3786public: 3787 /// getDecl - Get the declaration of this interface. 3788 ObjCInterfaceDecl *getDecl() const { return Decl; } 3789 3790 bool isSugared() const { return false; } 3791 QualType desugar() const { return QualType(this, 0); } 3792 3793 static bool classof(const Type *T) { 3794 return T->getTypeClass() == ObjCInterface; 3795 } 3796 static bool classof(const ObjCInterfaceType *) { return true; } 3797 3798 // Nonsense to "hide" certain members of ObjCObjectType within this 3799 // class. People asking for protocols on an ObjCInterfaceType are 3800 // not going to get what they want: ObjCInterfaceTypes are 3801 // guaranteed to have no protocols. 3802 enum { 3803 qual_iterator, 3804 qual_begin, 3805 qual_end, 3806 getNumProtocols, 3807 getProtocol 3808 }; 3809}; 3810 3811inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3812 if (const ObjCInterfaceType *T = 3813 getBaseType()->getAs<ObjCInterfaceType>()) 3814 return T->getDecl(); 3815 return 0; 3816} 3817 3818/// ObjCObjectPointerType - Used to represent a pointer to an 3819/// Objective C object. These are constructed from pointer 3820/// declarators when the pointee type is an ObjCObjectType (or sugar 3821/// for one). In addition, the 'id' and 'Class' types are typedefs 3822/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3823/// are translated into these. 3824/// 3825/// Pointers to pointers to Objective C objects are still PointerTypes; 3826/// only the first level of pointer gets it own type implementation. 3827class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3828 QualType PointeeType; 3829 3830 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3831 : Type(ObjCObjectPointer, Canonical, false, false, false), 3832 PointeeType(Pointee) {} 3833 friend class ASTContext; // ASTContext creates these. 3834 3835public: 3836 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3837 /// The result will always be an ObjCObjectType or sugar thereof. 3838 QualType getPointeeType() const { return PointeeType; } 3839 3840 /// getObjCObjectType - Gets the type pointed to by this ObjC 3841 /// pointer. This method always returns non-null. 3842 /// 3843 /// This method is equivalent to getPointeeType() except that 3844 /// it discards any typedefs (or other sugar) between this 3845 /// type and the "outermost" object type. So for: 3846 /// @class A; @protocol P; @protocol Q; 3847 /// typedef A<P> AP; 3848 /// typedef A A1; 3849 /// typedef A1<P> A1P; 3850 /// typedef A1P<Q> A1PQ; 3851 /// For 'A*', getObjectType() will return 'A'. 3852 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3853 /// For 'AP*', getObjectType() will return 'A<P>'. 3854 /// For 'A1*', getObjectType() will return 'A'. 3855 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3856 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3857 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3858 /// adding protocols to a protocol-qualified base discards the 3859 /// old qualifiers (for now). But if it didn't, getObjectType() 3860 /// would return 'A1P<Q>' (and we'd have to make iterating over 3861 /// qualifiers more complicated). 3862 const ObjCObjectType *getObjectType() const { 3863 return PointeeType->castAs<ObjCObjectType>(); 3864 } 3865 3866 /// getInterfaceType - If this pointer points to an Objective C 3867 /// @interface type, gets the type for that interface. Any protocol 3868 /// qualifiers on the interface are ignored. 3869 /// 3870 /// \return null if the base type for this pointer is 'id' or 'Class' 3871 const ObjCInterfaceType *getInterfaceType() const { 3872 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3873 } 3874 3875 /// getInterfaceDecl - If this pointer points to an Objective @interface 3876 /// type, gets the declaration for that interface. 3877 /// 3878 /// \return null if the base type for this pointer is 'id' or 'Class' 3879 ObjCInterfaceDecl *getInterfaceDecl() const { 3880 return getObjectType()->getInterface(); 3881 } 3882 3883 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3884 /// its object type is the primitive 'id' type with no protocols. 3885 bool isObjCIdType() const { 3886 return getObjectType()->isObjCUnqualifiedId(); 3887 } 3888 3889 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3890 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3891 bool isObjCClassType() const { 3892 return getObjectType()->isObjCUnqualifiedClass(); 3893 } 3894 3895 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3896 /// non-empty set of protocols. 3897 bool isObjCQualifiedIdType() const { 3898 return getObjectType()->isObjCQualifiedId(); 3899 } 3900 3901 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3902 /// some non-empty set of protocols. 3903 bool isObjCQualifiedClassType() const { 3904 return getObjectType()->isObjCQualifiedClass(); 3905 } 3906 3907 /// An iterator over the qualifiers on the object type. Provided 3908 /// for convenience. This will always iterate over the full set of 3909 /// protocols on a type, not just those provided directly. 3910 typedef ObjCObjectType::qual_iterator qual_iterator; 3911 3912 qual_iterator qual_begin() const { 3913 return getObjectType()->qual_begin(); 3914 } 3915 qual_iterator qual_end() const { 3916 return getObjectType()->qual_end(); 3917 } 3918 bool qual_empty() const { return getObjectType()->qual_empty(); } 3919 3920 /// getNumProtocols - Return the number of qualifying protocols on 3921 /// the object type. 3922 unsigned getNumProtocols() const { 3923 return getObjectType()->getNumProtocols(); 3924 } 3925 3926 /// \brief Retrieve a qualifying protocol by index on the object 3927 /// type. 3928 ObjCProtocolDecl *getProtocol(unsigned I) const { 3929 return getObjectType()->getProtocol(I); 3930 } 3931 3932 bool isSugared() const { return false; } 3933 QualType desugar() const { return QualType(this, 0); } 3934 3935 void Profile(llvm::FoldingSetNodeID &ID) { 3936 Profile(ID, getPointeeType()); 3937 } 3938 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3939 ID.AddPointer(T.getAsOpaquePtr()); 3940 } 3941 static bool classof(const Type *T) { 3942 return T->getTypeClass() == ObjCObjectPointer; 3943 } 3944 static bool classof(const ObjCObjectPointerType *) { return true; } 3945}; 3946 3947/// A qualifier set is used to build a set of qualifiers. 3948class QualifierCollector : public Qualifiers { 3949public: 3950 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3951 3952 /// Collect any qualifiers on the given type and return an 3953 /// unqualified type. The qualifiers are assumed to be consistent 3954 /// with those already in the type. 3955 const Type *strip(QualType type) { 3956 addFastQualifiers(type.getLocalFastQualifiers()); 3957 if (!type.hasLocalNonFastQualifiers()) 3958 return type.getTypePtrUnsafe(); 3959 3960 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 3961 addConsistentQualifiers(extQuals->getQualifiers()); 3962 return extQuals->getBaseType(); 3963 } 3964 3965 /// Apply the collected qualifiers to the given type. 3966 QualType apply(const ASTContext &Context, QualType QT) const; 3967 3968 /// Apply the collected qualifiers to the given type. 3969 QualType apply(const ASTContext &Context, const Type* T) const; 3970}; 3971 3972 3973// Inline function definitions. 3974 3975inline const Type *QualType::getTypePtr() const { 3976 return getCommonPtr()->BaseType; 3977} 3978 3979inline const Type *QualType::getTypePtrOrNull() const { 3980 return (isNull() ? 0 : getCommonPtr()->BaseType); 3981} 3982 3983inline SplitQualType QualType::split() const { 3984 if (!hasLocalNonFastQualifiers()) 3985 return SplitQualType(getTypePtrUnsafe(), 3986 Qualifiers::fromFastMask(getLocalFastQualifiers())); 3987 3988 const ExtQuals *eq = getExtQualsUnsafe(); 3989 Qualifiers qs = eq->getQualifiers(); 3990 qs.addFastQualifiers(getLocalFastQualifiers()); 3991 return SplitQualType(eq->getBaseType(), qs); 3992} 3993 3994inline Qualifiers QualType::getLocalQualifiers() const { 3995 Qualifiers Quals; 3996 if (hasLocalNonFastQualifiers()) 3997 Quals = getExtQualsUnsafe()->getQualifiers(); 3998 Quals.addFastQualifiers(getLocalFastQualifiers()); 3999 return Quals; 4000} 4001 4002inline Qualifiers QualType::getQualifiers() const { 4003 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4004 quals.addFastQualifiers(getLocalFastQualifiers()); 4005 return quals; 4006} 4007 4008inline unsigned QualType::getCVRQualifiers() const { 4009 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4010 cvr |= getLocalCVRQualifiers(); 4011 return cvr; 4012} 4013 4014inline QualType QualType::getCanonicalType() const { 4015 QualType canon = getCommonPtr()->CanonicalType; 4016 return canon.withFastQualifiers(getLocalFastQualifiers()); 4017} 4018 4019inline bool QualType::isCanonical() const { 4020 return getTypePtr()->isCanonicalUnqualified(); 4021} 4022 4023inline bool QualType::isCanonicalAsParam() const { 4024 if (!isCanonical()) return false; 4025 if (hasLocalQualifiers()) return false; 4026 4027 const Type *T = getTypePtr(); 4028 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4029 return false; 4030 4031 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4032} 4033 4034inline bool QualType::isConstQualified() const { 4035 return isLocalConstQualified() || 4036 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4037} 4038 4039inline bool QualType::isRestrictQualified() const { 4040 return isLocalRestrictQualified() || 4041 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4042} 4043 4044 4045inline bool QualType::isVolatileQualified() const { 4046 return isLocalVolatileQualified() || 4047 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4048} 4049 4050inline bool QualType::hasQualifiers() const { 4051 return hasLocalQualifiers() || 4052 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4053} 4054 4055inline QualType QualType::getUnqualifiedType() const { 4056 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4057 return QualType(getTypePtr(), 0); 4058 4059 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4060} 4061 4062inline SplitQualType QualType::getSplitUnqualifiedType() const { 4063 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4064 return split(); 4065 4066 return getSplitUnqualifiedTypeImpl(*this); 4067} 4068 4069inline void QualType::removeLocalConst() { 4070 removeLocalFastQualifiers(Qualifiers::Const); 4071} 4072 4073inline void QualType::removeLocalRestrict() { 4074 removeLocalFastQualifiers(Qualifiers::Restrict); 4075} 4076 4077inline void QualType::removeLocalVolatile() { 4078 removeLocalFastQualifiers(Qualifiers::Volatile); 4079} 4080 4081inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4082 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4083 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4084 4085 // Fast path: we don't need to touch the slow qualifiers. 4086 removeLocalFastQualifiers(Mask); 4087} 4088 4089/// getAddressSpace - Return the address space of this type. 4090inline unsigned QualType::getAddressSpace() const { 4091 return getQualifiers().getAddressSpace(); 4092} 4093 4094/// getObjCGCAttr - Return the gc attribute of this type. 4095inline Qualifiers::GC QualType::getObjCGCAttr() const { 4096 return getQualifiers().getObjCGCAttr(); 4097} 4098 4099inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4100 if (const PointerType *PT = t.getAs<PointerType>()) { 4101 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4102 return FT->getExtInfo(); 4103 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4104 return FT->getExtInfo(); 4105 4106 return FunctionType::ExtInfo(); 4107} 4108 4109inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4110 return getFunctionExtInfo(*t); 4111} 4112 4113/// \brief Determine whether this set of qualifiers is a superset of the given 4114/// set of qualifiers. 4115inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 4116 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 4117} 4118 4119/// isMoreQualifiedThan - Determine whether this type is more 4120/// qualified than the Other type. For example, "const volatile int" 4121/// is more qualified than "const int", "volatile int", and 4122/// "int". However, it is not more qualified than "const volatile 4123/// int". 4124inline bool QualType::isMoreQualifiedThan(QualType other) const { 4125 Qualifiers myQuals = getQualifiers(); 4126 Qualifiers otherQuals = other.getQualifiers(); 4127 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4128} 4129 4130/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4131/// as qualified as the Other type. For example, "const volatile 4132/// int" is at least as qualified as "const int", "volatile int", 4133/// "int", and "const volatile int". 4134inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4135 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4136} 4137 4138/// getNonReferenceType - If Type is a reference type (e.g., const 4139/// int&), returns the type that the reference refers to ("const 4140/// int"). Otherwise, returns the type itself. This routine is used 4141/// throughout Sema to implement C++ 5p6: 4142/// 4143/// If an expression initially has the type "reference to T" (8.3.2, 4144/// 8.5.3), the type is adjusted to "T" prior to any further 4145/// analysis, the expression designates the object or function 4146/// denoted by the reference, and the expression is an lvalue. 4147inline QualType QualType::getNonReferenceType() const { 4148 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4149 return RefType->getPointeeType(); 4150 else 4151 return *this; 4152} 4153 4154inline bool Type::isFunctionType() const { 4155 return isa<FunctionType>(CanonicalType); 4156} 4157inline bool Type::isPointerType() const { 4158 return isa<PointerType>(CanonicalType); 4159} 4160inline bool Type::isAnyPointerType() const { 4161 return isPointerType() || isObjCObjectPointerType(); 4162} 4163inline bool Type::isBlockPointerType() const { 4164 return isa<BlockPointerType>(CanonicalType); 4165} 4166inline bool Type::isReferenceType() const { 4167 return isa<ReferenceType>(CanonicalType); 4168} 4169inline bool Type::isLValueReferenceType() const { 4170 return isa<LValueReferenceType>(CanonicalType); 4171} 4172inline bool Type::isRValueReferenceType() const { 4173 return isa<RValueReferenceType>(CanonicalType); 4174} 4175inline bool Type::isFunctionPointerType() const { 4176 if (const PointerType *T = getAs<PointerType>()) 4177 return T->getPointeeType()->isFunctionType(); 4178 else 4179 return false; 4180} 4181inline bool Type::isMemberPointerType() const { 4182 return isa<MemberPointerType>(CanonicalType); 4183} 4184inline bool Type::isMemberFunctionPointerType() const { 4185 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4186 return T->isMemberFunctionPointer(); 4187 else 4188 return false; 4189} 4190inline bool Type::isMemberDataPointerType() const { 4191 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4192 return T->isMemberDataPointer(); 4193 else 4194 return false; 4195} 4196inline bool Type::isArrayType() const { 4197 return isa<ArrayType>(CanonicalType); 4198} 4199inline bool Type::isConstantArrayType() const { 4200 return isa<ConstantArrayType>(CanonicalType); 4201} 4202inline bool Type::isIncompleteArrayType() const { 4203 return isa<IncompleteArrayType>(CanonicalType); 4204} 4205inline bool Type::isVariableArrayType() const { 4206 return isa<VariableArrayType>(CanonicalType); 4207} 4208inline bool Type::isDependentSizedArrayType() const { 4209 return isa<DependentSizedArrayType>(CanonicalType); 4210} 4211inline bool Type::isBuiltinType() const { 4212 return isa<BuiltinType>(CanonicalType); 4213} 4214inline bool Type::isRecordType() const { 4215 return isa<RecordType>(CanonicalType); 4216} 4217inline bool Type::isEnumeralType() const { 4218 return isa<EnumType>(CanonicalType); 4219} 4220inline bool Type::isAnyComplexType() const { 4221 return isa<ComplexType>(CanonicalType); 4222} 4223inline bool Type::isVectorType() const { 4224 return isa<VectorType>(CanonicalType); 4225} 4226inline bool Type::isExtVectorType() const { 4227 return isa<ExtVectorType>(CanonicalType); 4228} 4229inline bool Type::isObjCObjectPointerType() const { 4230 return isa<ObjCObjectPointerType>(CanonicalType); 4231} 4232inline bool Type::isObjCObjectType() const { 4233 return isa<ObjCObjectType>(CanonicalType); 4234} 4235inline bool Type::isObjCObjectOrInterfaceType() const { 4236 return isa<ObjCInterfaceType>(CanonicalType) || 4237 isa<ObjCObjectType>(CanonicalType); 4238} 4239 4240inline bool Type::isObjCQualifiedIdType() const { 4241 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4242 return OPT->isObjCQualifiedIdType(); 4243 return false; 4244} 4245inline bool Type::isObjCQualifiedClassType() const { 4246 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4247 return OPT->isObjCQualifiedClassType(); 4248 return false; 4249} 4250inline bool Type::isObjCIdType() const { 4251 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4252 return OPT->isObjCIdType(); 4253 return false; 4254} 4255inline bool Type::isObjCClassType() const { 4256 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4257 return OPT->isObjCClassType(); 4258 return false; 4259} 4260inline bool Type::isObjCSelType() const { 4261 if (const PointerType *OPT = getAs<PointerType>()) 4262 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4263 return false; 4264} 4265inline bool Type::isObjCBuiltinType() const { 4266 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4267} 4268inline bool Type::isTemplateTypeParmType() const { 4269 return isa<TemplateTypeParmType>(CanonicalType); 4270} 4271 4272inline bool Type::isSpecificBuiltinType(unsigned K) const { 4273 if (const BuiltinType *BT = getAs<BuiltinType>()) 4274 if (BT->getKind() == (BuiltinType::Kind) K) 4275 return true; 4276 return false; 4277} 4278 4279inline bool Type::isPlaceholderType() const { 4280 if (const BuiltinType *BT = getAs<BuiltinType>()) 4281 return BT->isPlaceholderType(); 4282 return false; 4283} 4284 4285/// \brief Determines whether this is a type for which one can define 4286/// an overloaded operator. 4287inline bool Type::isOverloadableType() const { 4288 return isDependentType() || isRecordType() || isEnumeralType(); 4289} 4290 4291inline bool Type::hasPointerRepresentation() const { 4292 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4293 isObjCObjectPointerType() || isNullPtrType()); 4294} 4295 4296inline bool Type::hasObjCPointerRepresentation() const { 4297 return isObjCObjectPointerType(); 4298} 4299 4300inline const Type *Type::getBaseElementTypeUnsafe() const { 4301 const Type *type = this; 4302 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4303 type = arrayType->getElementType().getTypePtr(); 4304 return type; 4305} 4306 4307/// Insertion operator for diagnostics. This allows sending QualType's into a 4308/// diagnostic with <<. 4309inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4310 QualType T) { 4311 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4312 Diagnostic::ak_qualtype); 4313 return DB; 4314} 4315 4316/// Insertion operator for partial diagnostics. This allows sending QualType's 4317/// into a diagnostic with <<. 4318inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4319 QualType T) { 4320 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4321 Diagnostic::ak_qualtype); 4322 return PD; 4323} 4324 4325// Helper class template that is used by Type::getAs to ensure that one does 4326// not try to look through a qualified type to get to an array type. 4327template<typename T, 4328 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4329 llvm::is_base_of<ArrayType, T>::value)> 4330struct ArrayType_cannot_be_used_with_getAs { }; 4331 4332template<typename T> 4333struct ArrayType_cannot_be_used_with_getAs<T, true>; 4334 4335/// Member-template getAs<specific type>'. 4336template <typename T> const T *Type::getAs() const { 4337 ArrayType_cannot_be_used_with_getAs<T> at; 4338 (void)at; 4339 4340 // If this is directly a T type, return it. 4341 if (const T *Ty = dyn_cast<T>(this)) 4342 return Ty; 4343 4344 // If the canonical form of this type isn't the right kind, reject it. 4345 if (!isa<T>(CanonicalType)) 4346 return 0; 4347 4348 // If this is a typedef for the type, strip the typedef off without 4349 // losing all typedef information. 4350 return cast<T>(getUnqualifiedDesugaredType()); 4351} 4352 4353inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4354 // If this is directly an array type, return it. 4355 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4356 return arr; 4357 4358 // If the canonical form of this type isn't the right kind, reject it. 4359 if (!isa<ArrayType>(CanonicalType)) 4360 return 0; 4361 4362 // If this is a typedef for the type, strip the typedef off without 4363 // losing all typedef information. 4364 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4365} 4366 4367template <typename T> const T *Type::castAs() const { 4368 ArrayType_cannot_be_used_with_getAs<T> at; 4369 (void) at; 4370 4371 assert(isa<T>(CanonicalType)); 4372 if (const T *ty = dyn_cast<T>(this)) return ty; 4373 return cast<T>(getUnqualifiedDesugaredType()); 4374} 4375 4376inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4377 assert(isa<ArrayType>(CanonicalType)); 4378 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4379 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4380} 4381 4382} // end namespace clang 4383 4384#endif 4385