Type.h revision 218893
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/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/Basic/Visibility.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/TemplateName.h" 24#include "llvm/Support/Casting.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/ADT/APSInt.h" 27#include "llvm/ADT/FoldingSet.h" 28#include "llvm/ADT/Optional.h" 29#include "llvm/ADT/PointerIntPair.h" 30#include "llvm/ADT/PointerUnion.h" 31 32using llvm::isa; 33using llvm::cast; 34using llvm::cast_or_null; 35using llvm::dyn_cast; 36using llvm::dyn_cast_or_null; 37namespace clang { 38 enum { 39 TypeAlignmentInBits = 4, 40 TypeAlignment = 1 << TypeAlignmentInBits 41 }; 42 class Type; 43 class ExtQuals; 44 class QualType; 45} 46 47namespace llvm { 48 template <typename T> 49 class PointerLikeTypeTraits; 50 template<> 51 class PointerLikeTypeTraits< ::clang::Type*> { 52 public: 53 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 54 static inline ::clang::Type *getFromVoidPointer(void *P) { 55 return static_cast< ::clang::Type*>(P); 56 } 57 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 58 }; 59 template<> 60 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 61 public: 62 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 63 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 64 return static_cast< ::clang::ExtQuals*>(P); 65 } 66 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 67 }; 68 69 template <> 70 struct isPodLike<clang::QualType> { static const bool value = true; }; 71} 72 73namespace clang { 74 class ASTContext; 75 class TypedefDecl; 76 class TemplateDecl; 77 class TemplateTypeParmDecl; 78 class NonTypeTemplateParmDecl; 79 class TemplateTemplateParmDecl; 80 class TagDecl; 81 class RecordDecl; 82 class CXXRecordDecl; 83 class EnumDecl; 84 class FieldDecl; 85 class ObjCInterfaceDecl; 86 class ObjCProtocolDecl; 87 class ObjCMethodDecl; 88 class UnresolvedUsingTypenameDecl; 89 class Expr; 90 class Stmt; 91 class SourceLocation; 92 class StmtIteratorBase; 93 class TemplateArgument; 94 class TemplateArgumentLoc; 95 class TemplateArgumentListInfo; 96 class ElaboratedType; 97 class ExtQuals; 98 class ExtQualsTypeCommonBase; 99 struct PrintingPolicy; 100 101 template <typename> class CanQual; 102 typedef CanQual<Type> CanQualType; 103 104 // Provide forward declarations for all of the *Type classes 105#define TYPE(Class, Base) class Class##Type; 106#include "clang/AST/TypeNodes.def" 107 108/// Qualifiers - The collection of all-type qualifiers we support. 109/// Clang supports five independent qualifiers: 110/// * C99: const, volatile, and restrict 111/// * Embedded C (TR18037): address spaces 112/// * Objective C: the GC attributes (none, weak, or strong) 113class Qualifiers { 114public: 115 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 116 Const = 0x1, 117 Restrict = 0x2, 118 Volatile = 0x4, 119 CVRMask = Const | Volatile | Restrict 120 }; 121 122 enum GC { 123 GCNone = 0, 124 Weak, 125 Strong 126 }; 127 128 enum { 129 /// The maximum supported address space number. 130 /// 24 bits should be enough for anyone. 131 MaxAddressSpace = 0xffffffu, 132 133 /// The width of the "fast" qualifier mask. 134 FastWidth = 3, 135 136 /// The fast qualifier mask. 137 FastMask = (1 << FastWidth) - 1 138 }; 139 140 Qualifiers() : Mask(0) {} 141 142 static Qualifiers fromFastMask(unsigned Mask) { 143 Qualifiers Qs; 144 Qs.addFastQualifiers(Mask); 145 return Qs; 146 } 147 148 static Qualifiers fromCVRMask(unsigned CVR) { 149 Qualifiers Qs; 150 Qs.addCVRQualifiers(CVR); 151 return Qs; 152 } 153 154 // Deserialize qualifiers from an opaque representation. 155 static Qualifiers fromOpaqueValue(unsigned opaque) { 156 Qualifiers Qs; 157 Qs.Mask = opaque; 158 return Qs; 159 } 160 161 // Serialize these qualifiers into an opaque representation. 162 unsigned getAsOpaqueValue() const { 163 return Mask; 164 } 165 166 bool hasConst() const { return Mask & Const; } 167 void setConst(bool flag) { 168 Mask = (Mask & ~Const) | (flag ? Const : 0); 169 } 170 void removeConst() { Mask &= ~Const; } 171 void addConst() { Mask |= Const; } 172 173 bool hasVolatile() const { return Mask & Volatile; } 174 void setVolatile(bool flag) { 175 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 176 } 177 void removeVolatile() { Mask &= ~Volatile; } 178 void addVolatile() { Mask |= Volatile; } 179 180 bool hasRestrict() const { return Mask & Restrict; } 181 void setRestrict(bool flag) { 182 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 183 } 184 void removeRestrict() { Mask &= ~Restrict; } 185 void addRestrict() { Mask |= Restrict; } 186 187 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 188 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 189 void setCVRQualifiers(unsigned mask) { 190 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 191 Mask = (Mask & ~CVRMask) | mask; 192 } 193 void removeCVRQualifiers(unsigned mask) { 194 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 195 Mask &= ~mask; 196 } 197 void removeCVRQualifiers() { 198 removeCVRQualifiers(CVRMask); 199 } 200 void addCVRQualifiers(unsigned mask) { 201 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 202 Mask |= mask; 203 } 204 205 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 206 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 207 void setObjCGCAttr(GC type) { 208 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 209 } 210 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 211 void addObjCGCAttr(GC type) { 212 assert(type); 213 setObjCGCAttr(type); 214 } 215 216 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 217 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 218 void setAddressSpace(unsigned space) { 219 assert(space <= MaxAddressSpace); 220 Mask = (Mask & ~AddressSpaceMask) 221 | (((uint32_t) space) << AddressSpaceShift); 222 } 223 void removeAddressSpace() { setAddressSpace(0); } 224 void addAddressSpace(unsigned space) { 225 assert(space); 226 setAddressSpace(space); 227 } 228 229 // Fast qualifiers are those that can be allocated directly 230 // on a QualType object. 231 bool hasFastQualifiers() const { return getFastQualifiers(); } 232 unsigned getFastQualifiers() const { return Mask & FastMask; } 233 void setFastQualifiers(unsigned mask) { 234 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 235 Mask = (Mask & ~FastMask) | mask; 236 } 237 void removeFastQualifiers(unsigned mask) { 238 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 239 Mask &= ~mask; 240 } 241 void removeFastQualifiers() { 242 removeFastQualifiers(FastMask); 243 } 244 void addFastQualifiers(unsigned mask) { 245 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 246 Mask |= mask; 247 } 248 249 /// hasNonFastQualifiers - Return true if the set contains any 250 /// qualifiers which require an ExtQuals node to be allocated. 251 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 252 Qualifiers getNonFastQualifiers() const { 253 Qualifiers Quals = *this; 254 Quals.setFastQualifiers(0); 255 return Quals; 256 } 257 258 /// hasQualifiers - Return true if the set contains any qualifiers. 259 bool hasQualifiers() const { return Mask; } 260 bool empty() const { return !Mask; } 261 262 /// \brief Add the qualifiers from the given set to this set. 263 void addQualifiers(Qualifiers Q) { 264 // If the other set doesn't have any non-boolean qualifiers, just 265 // bit-or it in. 266 if (!(Q.Mask & ~CVRMask)) 267 Mask |= Q.Mask; 268 else { 269 Mask |= (Q.Mask & CVRMask); 270 if (Q.hasAddressSpace()) 271 addAddressSpace(Q.getAddressSpace()); 272 if (Q.hasObjCGCAttr()) 273 addObjCGCAttr(Q.getObjCGCAttr()); 274 } 275 } 276 277 /// \brief Add the qualifiers from the given set to this set, given that 278 /// they don't conflict. 279 void addConsistentQualifiers(Qualifiers qs) { 280 assert(getAddressSpace() == qs.getAddressSpace() || 281 !hasAddressSpace() || !qs.hasAddressSpace()); 282 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 283 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 284 Mask |= qs.Mask; 285 } 286 287 /// \brief Determines if these qualifiers compatibly include another set. 288 /// Generally this answers the question of whether an object with the other 289 /// qualifiers can be safely used as an object with these qualifiers. 290 bool compatiblyIncludes(Qualifiers other) const { 291 // Non-CVR qualifiers must match exactly. CVR qualifiers may subset. 292 return ((Mask & ~CVRMask) == (other.Mask & ~CVRMask)) && 293 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 294 } 295 296 bool isSupersetOf(Qualifiers Other) const; 297 298 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 299 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 300 301 operator bool() const { return hasQualifiers(); } 302 303 Qualifiers &operator+=(Qualifiers R) { 304 addQualifiers(R); 305 return *this; 306 } 307 308 // Union two qualifier sets. If an enumerated qualifier appears 309 // in both sets, use the one from the right. 310 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 311 L += R; 312 return L; 313 } 314 315 Qualifiers &operator-=(Qualifiers R) { 316 Mask = Mask & ~(R.Mask); 317 return *this; 318 } 319 320 /// \brief Compute the difference between two qualifier sets. 321 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 322 L -= R; 323 return L; 324 } 325 326 std::string getAsString() const; 327 std::string getAsString(const PrintingPolicy &Policy) const { 328 std::string Buffer; 329 getAsStringInternal(Buffer, Policy); 330 return Buffer; 331 } 332 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 333 334 void Profile(llvm::FoldingSetNodeID &ID) const { 335 ID.AddInteger(Mask); 336 } 337 338private: 339 340 // bits: |0 1 2|3 .. 4|5 .. 31| 341 // |C R V|GCAttr|AddrSpace| 342 uint32_t Mask; 343 344 static const uint32_t GCAttrMask = 0x18; 345 static const uint32_t GCAttrShift = 3; 346 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 347 static const uint32_t AddressSpaceShift = 5; 348}; 349 350/// CallingConv - Specifies the calling convention that a function uses. 351enum CallingConv { 352 CC_Default, 353 CC_C, // __attribute__((cdecl)) 354 CC_X86StdCall, // __attribute__((stdcall)) 355 CC_X86FastCall, // __attribute__((fastcall)) 356 CC_X86ThisCall, // __attribute__((thiscall)) 357 CC_X86Pascal // __attribute__((pascal)) 358}; 359 360typedef std::pair<const Type*, Qualifiers> SplitQualType; 361 362/// QualType - For efficiency, we don't store CV-qualified types as nodes on 363/// their own: instead each reference to a type stores the qualifiers. This 364/// greatly reduces the number of nodes we need to allocate for types (for 365/// example we only need one for 'int', 'const int', 'volatile int', 366/// 'const volatile int', etc). 367/// 368/// As an added efficiency bonus, instead of making this a pair, we 369/// just store the two bits we care about in the low bits of the 370/// pointer. To handle the packing/unpacking, we make QualType be a 371/// simple wrapper class that acts like a smart pointer. A third bit 372/// indicates whether there are extended qualifiers present, in which 373/// case the pointer points to a special structure. 374class QualType { 375 // Thankfully, these are efficiently composable. 376 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 377 Qualifiers::FastWidth> Value; 378 379 const ExtQuals *getExtQualsUnsafe() const { 380 return Value.getPointer().get<const ExtQuals*>(); 381 } 382 383 const Type *getTypePtrUnsafe() const { 384 return Value.getPointer().get<const Type*>(); 385 } 386 387 const ExtQualsTypeCommonBase *getCommonPtr() const { 388 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 389 uintptr_t CommonPtrVal 390 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 391 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 392 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 393 } 394 395 friend class QualifierCollector; 396public: 397 QualType() {} 398 399 QualType(const Type *Ptr, unsigned Quals) 400 : Value(Ptr, Quals) {} 401 QualType(const ExtQuals *Ptr, unsigned Quals) 402 : Value(Ptr, Quals) {} 403 404 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 405 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 406 407 /// Retrieves a pointer to the underlying (unqualified) type. 408 /// This should really return a const Type, but it's not worth 409 /// changing all the users right now. 410 /// 411 /// This function requires that the type not be NULL. If the type might be 412 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 413 const Type *getTypePtr() const; 414 415 const Type *getTypePtrOrNull() const; 416 417 /// Divides a QualType into its unqualified type and a set of local 418 /// qualifiers. 419 SplitQualType split() const; 420 421 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 422 static QualType getFromOpaquePtr(const void *Ptr) { 423 QualType T; 424 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 425 return T; 426 } 427 428 const Type &operator*() const { 429 return *getTypePtr(); 430 } 431 432 const Type *operator->() const { 433 return getTypePtr(); 434 } 435 436 bool isCanonical() const; 437 bool isCanonicalAsParam() const; 438 439 /// isNull - Return true if this QualType doesn't point to a type yet. 440 bool isNull() const { 441 return Value.getPointer().isNull(); 442 } 443 444 /// \brief Determine whether this particular QualType instance has the 445 /// "const" qualifier set, without looking through typedefs that may have 446 /// added "const" at a different level. 447 bool isLocalConstQualified() const { 448 return (getLocalFastQualifiers() & Qualifiers::Const); 449 } 450 451 /// \brief Determine whether this type is const-qualified. 452 bool isConstQualified() const; 453 454 /// \brief Determine whether this particular QualType instance has the 455 /// "restrict" qualifier set, without looking through typedefs that may have 456 /// added "restrict" at a different level. 457 bool isLocalRestrictQualified() const { 458 return (getLocalFastQualifiers() & Qualifiers::Restrict); 459 } 460 461 /// \brief Determine whether this type is restrict-qualified. 462 bool isRestrictQualified() const; 463 464 /// \brief Determine whether this particular QualType instance has the 465 /// "volatile" qualifier set, without looking through typedefs that may have 466 /// added "volatile" at a different level. 467 bool isLocalVolatileQualified() const { 468 return (getLocalFastQualifiers() & Qualifiers::Volatile); 469 } 470 471 /// \brief Determine whether this type is volatile-qualified. 472 bool isVolatileQualified() const; 473 474 /// \brief Determine whether this particular QualType instance has any 475 /// qualifiers, without looking through any typedefs that might add 476 /// qualifiers at a different level. 477 bool hasLocalQualifiers() const { 478 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 479 } 480 481 /// \brief Determine whether this type has any qualifiers. 482 bool hasQualifiers() const; 483 484 /// \brief Determine whether this particular QualType instance has any 485 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 486 /// instance. 487 bool hasLocalNonFastQualifiers() const { 488 return Value.getPointer().is<const ExtQuals*>(); 489 } 490 491 /// \brief Retrieve the set of qualifiers local to this particular QualType 492 /// instance, not including any qualifiers acquired through typedefs or 493 /// other sugar. 494 Qualifiers getLocalQualifiers() const; 495 496 /// \brief Retrieve the set of qualifiers applied to this type. 497 Qualifiers getQualifiers() const; 498 499 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 500 /// local to this particular QualType instance, not including any qualifiers 501 /// acquired through typedefs or other sugar. 502 unsigned getLocalCVRQualifiers() const { 503 return getLocalFastQualifiers(); 504 } 505 506 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 507 /// applied to this type. 508 unsigned getCVRQualifiers() const; 509 510 bool isConstant(ASTContext& Ctx) const { 511 return QualType::isConstant(*this, Ctx); 512 } 513 514 // Don't promise in the API that anything besides 'const' can be 515 // easily added. 516 517 /// addConst - add the specified type qualifier to this QualType. 518 void addConst() { 519 addFastQualifiers(Qualifiers::Const); 520 } 521 QualType withConst() const { 522 return withFastQualifiers(Qualifiers::Const); 523 } 524 525 void addFastQualifiers(unsigned TQs) { 526 assert(!(TQs & ~Qualifiers::FastMask) 527 && "non-fast qualifier bits set in mask!"); 528 Value.setInt(Value.getInt() | TQs); 529 } 530 531 void removeLocalConst(); 532 void removeLocalVolatile(); 533 void removeLocalRestrict(); 534 void removeLocalCVRQualifiers(unsigned Mask); 535 536 void removeLocalFastQualifiers() { Value.setInt(0); } 537 void removeLocalFastQualifiers(unsigned Mask) { 538 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 539 Value.setInt(Value.getInt() & ~Mask); 540 } 541 542 // Creates a type with the given qualifiers in addition to any 543 // qualifiers already on this type. 544 QualType withFastQualifiers(unsigned TQs) const { 545 QualType T = *this; 546 T.addFastQualifiers(TQs); 547 return T; 548 } 549 550 // Creates a type with exactly the given fast qualifiers, removing 551 // any existing fast qualifiers. 552 QualType withExactLocalFastQualifiers(unsigned TQs) const { 553 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 554 } 555 556 // Removes fast qualifiers, but leaves any extended qualifiers in place. 557 QualType withoutLocalFastQualifiers() const { 558 QualType T = *this; 559 T.removeLocalFastQualifiers(); 560 return T; 561 } 562 563 QualType getCanonicalType() const; 564 565 /// \brief Return this type with all of the instance-specific qualifiers 566 /// removed, but without removing any qualifiers that may have been applied 567 /// through typedefs. 568 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 569 570 /// \brief Retrieve the unqualified variant of the given type, 571 /// removing as little sugar as possible. 572 /// 573 /// This routine looks through various kinds of sugar to find the 574 /// least-desugared type that is unqualified. For example, given: 575 /// 576 /// \code 577 /// typedef int Integer; 578 /// typedef const Integer CInteger; 579 /// typedef CInteger DifferenceType; 580 /// \endcode 581 /// 582 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 583 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 584 /// 585 /// The resulting type might still be qualified if it's an array 586 /// type. To strip qualifiers even from within an array type, use 587 /// ASTContext::getUnqualifiedArrayType. 588 inline QualType getUnqualifiedType() const; 589 590 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 591 /// given type, removing as little sugar as possible. 592 /// 593 /// Like getUnqualifiedType(), but also returns the set of 594 /// qualifiers that were built up. 595 /// 596 /// The resulting type might still be qualified if it's an array 597 /// type. To strip qualifiers even from within an array type, use 598 /// ASTContext::getUnqualifiedArrayType. 599 inline SplitQualType getSplitUnqualifiedType() const; 600 601 bool isMoreQualifiedThan(QualType Other) const; 602 bool isAtLeastAsQualifiedAs(QualType Other) const; 603 QualType getNonReferenceType() const; 604 605 /// \brief Determine the type of a (typically non-lvalue) expression with the 606 /// specified result type. 607 /// 608 /// This routine should be used for expressions for which the return type is 609 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 610 /// an lvalue. It removes a top-level reference (since there are no 611 /// expressions of reference type) and deletes top-level cvr-qualifiers 612 /// from non-class types (in C++) or all types (in C). 613 QualType getNonLValueExprType(ASTContext &Context) const; 614 615 /// getDesugaredType - Return the specified type with any "sugar" removed from 616 /// the type. This takes off typedefs, typeof's etc. If the outer level of 617 /// the type is already concrete, it returns it unmodified. This is similar 618 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 619 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 620 /// concrete. 621 /// 622 /// Qualifiers are left in place. 623 QualType getDesugaredType(const ASTContext &Context) const { 624 return getDesugaredType(*this, Context); 625 } 626 627 SplitQualType getSplitDesugaredType() const { 628 return getSplitDesugaredType(*this); 629 } 630 631 /// IgnoreParens - Returns the specified type after dropping any 632 /// outer-level parentheses. 633 QualType IgnoreParens() const { 634 if (isa<ParenType>(*this)) 635 return QualType::IgnoreParens(*this); 636 return *this; 637 } 638 639 /// operator==/!= - Indicate whether the specified types and qualifiers are 640 /// identical. 641 friend bool operator==(const QualType &LHS, const QualType &RHS) { 642 return LHS.Value == RHS.Value; 643 } 644 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 645 return LHS.Value != RHS.Value; 646 } 647 std::string getAsString() const { 648 return getAsString(split()); 649 } 650 static std::string getAsString(SplitQualType split) { 651 return getAsString(split.first, split.second); 652 } 653 static std::string getAsString(const Type *ty, Qualifiers qs); 654 655 std::string getAsString(const PrintingPolicy &Policy) const { 656 std::string S; 657 getAsStringInternal(S, Policy); 658 return S; 659 } 660 void getAsStringInternal(std::string &Str, 661 const PrintingPolicy &Policy) const { 662 return getAsStringInternal(split(), Str, Policy); 663 } 664 static void getAsStringInternal(SplitQualType split, std::string &out, 665 const PrintingPolicy &policy) { 666 return getAsStringInternal(split.first, split.second, out, policy); 667 } 668 static void getAsStringInternal(const Type *ty, Qualifiers qs, 669 std::string &out, 670 const PrintingPolicy &policy); 671 672 void dump(const char *s) const; 673 void dump() const; 674 675 void Profile(llvm::FoldingSetNodeID &ID) const { 676 ID.AddPointer(getAsOpaquePtr()); 677 } 678 679 /// getAddressSpace - Return the address space of this type. 680 inline unsigned getAddressSpace() const; 681 682 /// GCAttrTypesAttr - Returns gc attribute of this type. 683 inline Qualifiers::GC getObjCGCAttr() const; 684 685 /// isObjCGCWeak true when Type is objc's weak. 686 bool isObjCGCWeak() const { 687 return getObjCGCAttr() == Qualifiers::Weak; 688 } 689 690 /// isObjCGCStrong true when Type is objc's strong. 691 bool isObjCGCStrong() const { 692 return getObjCGCAttr() == Qualifiers::Strong; 693 } 694 695 enum DestructionKind { 696 DK_none, 697 DK_cxx_destructor 698 }; 699 700 /// isDestructedType - nonzero if objects of this type require 701 /// non-trivial work to clean up after. Non-zero because it's 702 /// conceivable that qualifiers (objc_gc(weak)?) could make 703 /// something require destruction. 704 DestructionKind isDestructedType() const { 705 return isDestructedTypeImpl(*this); 706 } 707 708private: 709 // These methods are implemented in a separate translation unit; 710 // "static"-ize them to avoid creating temporary QualTypes in the 711 // caller. 712 static bool isConstant(QualType T, ASTContext& Ctx); 713 static QualType getDesugaredType(QualType T, const ASTContext &Context); 714 static SplitQualType getSplitDesugaredType(QualType T); 715 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 716 static QualType IgnoreParens(QualType T); 717 static DestructionKind isDestructedTypeImpl(QualType type); 718}; 719 720} // end clang. 721 722namespace llvm { 723/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 724/// to a specific Type class. 725template<> struct simplify_type<const ::clang::QualType> { 726 typedef const ::clang::Type *SimpleType; 727 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 728 return Val.getTypePtr(); 729 } 730}; 731template<> struct simplify_type< ::clang::QualType> 732 : public simplify_type<const ::clang::QualType> {}; 733 734// Teach SmallPtrSet that QualType is "basically a pointer". 735template<> 736class PointerLikeTypeTraits<clang::QualType> { 737public: 738 static inline void *getAsVoidPointer(clang::QualType P) { 739 return P.getAsOpaquePtr(); 740 } 741 static inline clang::QualType getFromVoidPointer(void *P) { 742 return clang::QualType::getFromOpaquePtr(P); 743 } 744 // Various qualifiers go in low bits. 745 enum { NumLowBitsAvailable = 0 }; 746}; 747 748} // end namespace llvm 749 750namespace clang { 751 752/// \brief Base class that is common to both the \c ExtQuals and \c Type 753/// classes, which allows \c QualType to access the common fields between the 754/// two. 755/// 756class ExtQualsTypeCommonBase { 757 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 758 : BaseType(baseType), CanonicalType(canon) {} 759 760 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 761 /// a self-referential pointer (for \c Type). 762 /// 763 /// This pointer allows an efficient mapping from a QualType to its 764 /// underlying type pointer. 765 const Type *const BaseType; 766 767 /// \brief The canonical type of this type. A QualType. 768 QualType CanonicalType; 769 770 friend class QualType; 771 friend class Type; 772 friend class ExtQuals; 773}; 774 775/// ExtQuals - We can encode up to four bits in the low bits of a 776/// type pointer, but there are many more type qualifiers that we want 777/// to be able to apply to an arbitrary type. Therefore we have this 778/// struct, intended to be heap-allocated and used by QualType to 779/// store qualifiers. 780/// 781/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 782/// in three low bits on the QualType pointer; a fourth bit records whether 783/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 784/// Objective-C GC attributes) are much more rare. 785class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 786 // NOTE: changing the fast qualifiers should be straightforward as 787 // long as you don't make 'const' non-fast. 788 // 1. Qualifiers: 789 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 790 // Fast qualifiers must occupy the low-order bits. 791 // b) Update Qualifiers::FastWidth and FastMask. 792 // 2. QualType: 793 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 794 // b) Update remove{Volatile,Restrict}, defined near the end of 795 // this header. 796 // 3. ASTContext: 797 // a) Update get{Volatile,Restrict}Type. 798 799 /// Quals - the immutable set of qualifiers applied by this 800 /// node; always contains extended qualifiers. 801 Qualifiers Quals; 802 803 ExtQuals *this_() { return this; } 804 805public: 806 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 807 : ExtQualsTypeCommonBase(baseType, 808 canon.isNull() ? QualType(this_(), 0) : canon), 809 Quals(quals) 810 { 811 assert(Quals.hasNonFastQualifiers() 812 && "ExtQuals created with no fast qualifiers"); 813 assert(!Quals.hasFastQualifiers() 814 && "ExtQuals created with fast qualifiers"); 815 } 816 817 Qualifiers getQualifiers() const { return Quals; } 818 819 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 820 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 821 822 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 823 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 824 825 const Type *getBaseType() const { return BaseType; } 826 827public: 828 void Profile(llvm::FoldingSetNodeID &ID) const { 829 Profile(ID, getBaseType(), Quals); 830 } 831 static void Profile(llvm::FoldingSetNodeID &ID, 832 const Type *BaseType, 833 Qualifiers Quals) { 834 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 835 ID.AddPointer(BaseType); 836 Quals.Profile(ID); 837 } 838}; 839 840/// \brief The kind of C++0x ref-qualifier associated with a function type, 841/// which determines whether a member function's "this" object can be an 842/// lvalue, rvalue, or neither. 843enum RefQualifierKind { 844 /// \brief No ref-qualifier was provided. 845 RQ_None = 0, 846 /// \brief An lvalue ref-qualifier was provided (\c &). 847 RQ_LValue, 848 /// \brief An rvalue ref-qualifier was provided (\c &&). 849 RQ_RValue 850}; 851 852/// Type - This is the base class of the type hierarchy. A central concept 853/// with types is that each type always has a canonical type. A canonical type 854/// is the type with any typedef names stripped out of it or the types it 855/// references. For example, consider: 856/// 857/// typedef int foo; 858/// typedef foo* bar; 859/// 'int *' 'foo *' 'bar' 860/// 861/// There will be a Type object created for 'int'. Since int is canonical, its 862/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 863/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 864/// there is a PointerType that represents 'int*', which, like 'int', is 865/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 866/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 867/// is also 'int*'. 868/// 869/// Non-canonical types are useful for emitting diagnostics, without losing 870/// information about typedefs being used. Canonical types are useful for type 871/// comparisons (they allow by-pointer equality tests) and useful for reasoning 872/// about whether something has a particular form (e.g. is a function type), 873/// because they implicitly, recursively, strip all typedefs out of a type. 874/// 875/// Types, once created, are immutable. 876/// 877class Type : public ExtQualsTypeCommonBase { 878public: 879 enum TypeClass { 880#define TYPE(Class, Base) Class, 881#define LAST_TYPE(Class) TypeLast = Class, 882#define ABSTRACT_TYPE(Class, Base) 883#include "clang/AST/TypeNodes.def" 884 TagFirst = Record, TagLast = Enum 885 }; 886 887private: 888 Type(const Type&); // DO NOT IMPLEMENT. 889 void operator=(const Type&); // DO NOT IMPLEMENT. 890 891 /// Bitfields required by the Type class. 892 class TypeBitfields { 893 friend class Type; 894 template <class T> friend class TypePropertyCache; 895 896 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 897 unsigned TC : 8; 898 899 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 900 /// Note that this should stay at the end of the ivars for Type so that 901 /// subclasses can pack their bitfields into the same word. 902 unsigned Dependent : 1; 903 904 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 905 unsigned VariablyModified : 1; 906 907 /// \brief Whether this type contains an unexpanded parameter pack 908 /// (for C++0x variadic templates). 909 unsigned ContainsUnexpandedParameterPack : 1; 910 911 /// \brief Nonzero if the cache (i.e. the bitfields here starting 912 /// with 'Cache') is valid. If so, then this is a 913 /// LangOptions::VisibilityMode+1. 914 mutable unsigned CacheValidAndVisibility : 2; 915 916 /// \brief Linkage of this type. 917 mutable unsigned CachedLinkage : 2; 918 919 /// \brief Whether this type involves and local or unnamed types. 920 mutable unsigned CachedLocalOrUnnamed : 1; 921 922 /// \brief FromAST - Whether this type comes from an AST file. 923 mutable unsigned FromAST : 1; 924 925 bool isCacheValid() const { 926 return (CacheValidAndVisibility != 0); 927 } 928 Visibility getVisibility() const { 929 assert(isCacheValid() && "getting linkage from invalid cache"); 930 return static_cast<Visibility>(CacheValidAndVisibility-1); 931 } 932 Linkage getLinkage() const { 933 assert(isCacheValid() && "getting linkage from invalid cache"); 934 return static_cast<Linkage>(CachedLinkage); 935 } 936 bool hasLocalOrUnnamedType() const { 937 assert(isCacheValid() && "getting linkage from invalid cache"); 938 return CachedLocalOrUnnamed; 939 } 940 }; 941 enum { NumTypeBits = 17 }; 942 943protected: 944 // These classes allow subclasses to somewhat cleanly pack bitfields 945 // into Type. 946 947 class ArrayTypeBitfields { 948 friend class ArrayType; 949 950 unsigned : NumTypeBits; 951 952 /// IndexTypeQuals - CVR qualifiers from declarations like 953 /// 'int X[static restrict 4]'. For function parameters only. 954 unsigned IndexTypeQuals : 3; 955 956 /// SizeModifier - storage class qualifiers from declarations like 957 /// 'int X[static restrict 4]'. For function parameters only. 958 /// Actually an ArrayType::ArraySizeModifier. 959 unsigned SizeModifier : 3; 960 }; 961 962 class BuiltinTypeBitfields { 963 friend class BuiltinType; 964 965 unsigned : NumTypeBits; 966 967 /// The kind (BuiltinType::Kind) of builtin type this is. 968 unsigned Kind : 8; 969 }; 970 971 class FunctionTypeBitfields { 972 friend class FunctionType; 973 974 unsigned : NumTypeBits; 975 976 /// Extra information which affects how the function is called, like 977 /// regparm and the calling convention. 978 unsigned ExtInfo : 8; 979 980 /// Whether the function is variadic. Only used by FunctionProtoType. 981 unsigned Variadic : 1; 982 983 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 984 /// other bitfields. 985 /// The qualifiers are part of FunctionProtoType because... 986 /// 987 /// C++ 8.3.5p4: The return type, the parameter type list and the 988 /// cv-qualifier-seq, [...], are part of the function type. 989 unsigned TypeQuals : 3; 990 991 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 992 /// 993 /// This is a value of type \c RefQualifierKind. 994 unsigned RefQualifier : 2; 995 }; 996 997 class ObjCObjectTypeBitfields { 998 friend class ObjCObjectType; 999 1000 unsigned : NumTypeBits; 1001 1002 /// NumProtocols - The number of protocols stored directly on this 1003 /// object type. 1004 unsigned NumProtocols : 32 - NumTypeBits; 1005 }; 1006 1007 class ReferenceTypeBitfields { 1008 friend class ReferenceType; 1009 1010 unsigned : NumTypeBits; 1011 1012 /// True if the type was originally spelled with an lvalue sigil. 1013 /// This is never true of rvalue references but can also be false 1014 /// on lvalue references because of C++0x [dcl.typedef]p9, 1015 /// as follows: 1016 /// 1017 /// typedef int &ref; // lvalue, spelled lvalue 1018 /// typedef int &&rvref; // rvalue 1019 /// ref &a; // lvalue, inner ref, spelled lvalue 1020 /// ref &&a; // lvalue, inner ref 1021 /// rvref &a; // lvalue, inner ref, spelled lvalue 1022 /// rvref &&a; // rvalue, inner ref 1023 unsigned SpelledAsLValue : 1; 1024 1025 /// True if the inner type is a reference type. This only happens 1026 /// in non-canonical forms. 1027 unsigned InnerRef : 1; 1028 }; 1029 1030 class TypeWithKeywordBitfields { 1031 friend class TypeWithKeyword; 1032 1033 unsigned : NumTypeBits; 1034 1035 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1036 unsigned Keyword : 8; 1037 }; 1038 1039 class VectorTypeBitfields { 1040 friend class VectorType; 1041 1042 unsigned : NumTypeBits; 1043 1044 /// VecKind - The kind of vector, either a generic vector type or some 1045 /// target-specific vector type such as for AltiVec or Neon. 1046 unsigned VecKind : 3; 1047 1048 /// NumElements - The number of elements in the vector. 1049 unsigned NumElements : 29 - NumTypeBits; 1050 }; 1051 1052 class AttributedTypeBitfields { 1053 friend class AttributedType; 1054 1055 unsigned : NumTypeBits; 1056 1057 /// AttrKind - an AttributedType::Kind 1058 unsigned AttrKind : 32 - NumTypeBits; 1059 }; 1060 1061 union { 1062 TypeBitfields TypeBits; 1063 ArrayTypeBitfields ArrayTypeBits; 1064 AttributedTypeBitfields AttributedTypeBits; 1065 BuiltinTypeBitfields BuiltinTypeBits; 1066 FunctionTypeBitfields FunctionTypeBits; 1067 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1068 ReferenceTypeBitfields ReferenceTypeBits; 1069 TypeWithKeywordBitfields TypeWithKeywordBits; 1070 VectorTypeBitfields VectorTypeBits; 1071 }; 1072 1073private: 1074 /// \brief Set whether this type comes from an AST file. 1075 void setFromAST(bool V = true) const { 1076 TypeBits.FromAST = V; 1077 } 1078 1079 template <class T> friend class TypePropertyCache; 1080 1081protected: 1082 // silence VC++ warning C4355: 'this' : used in base member initializer list 1083 Type *this_() { return this; } 1084 Type(TypeClass tc, QualType canon, bool Dependent, bool VariablyModified, 1085 bool ContainsUnexpandedParameterPack) 1086 : ExtQualsTypeCommonBase(this, 1087 canon.isNull() ? QualType(this_(), 0) : canon) { 1088 TypeBits.TC = tc; 1089 TypeBits.Dependent = Dependent; 1090 TypeBits.VariablyModified = VariablyModified; 1091 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1092 TypeBits.CacheValidAndVisibility = 0; 1093 TypeBits.CachedLocalOrUnnamed = false; 1094 TypeBits.CachedLinkage = NoLinkage; 1095 TypeBits.FromAST = false; 1096 } 1097 friend class ASTContext; 1098 1099 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1100 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1101 void setContainsUnexpandedParameterPack(bool PP = true) { 1102 TypeBits.ContainsUnexpandedParameterPack = PP; 1103 } 1104 1105public: 1106 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1107 1108 /// \brief Whether this type comes from an AST file. 1109 bool isFromAST() const { return TypeBits.FromAST; } 1110 1111 /// \brief Whether this type is or contains an unexpanded parameter 1112 /// pack, used to support C++0x variadic templates. 1113 /// 1114 /// A type that contains a parameter pack shall be expanded by the 1115 /// ellipsis operator at some point. For example, the typedef in the 1116 /// following example contains an unexpanded parameter pack 'T': 1117 /// 1118 /// \code 1119 /// template<typename ...T> 1120 /// struct X { 1121 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1122 /// }; 1123 /// \endcode 1124 /// 1125 /// Note that this routine does not specify which 1126 bool containsUnexpandedParameterPack() const { 1127 return TypeBits.ContainsUnexpandedParameterPack; 1128 } 1129 1130 /// Determines if this type would be canonical if it had no further 1131 /// qualification. 1132 bool isCanonicalUnqualified() const { 1133 return CanonicalType == QualType(this, 0); 1134 } 1135 1136 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1137 /// object types, function types, and incomplete types. 1138 1139 /// isIncompleteType - Return true if this is an incomplete type. 1140 /// A type that can describe objects, but which lacks information needed to 1141 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1142 /// routine will need to determine if the size is actually required. 1143 bool isIncompleteType() const; 1144 1145 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1146 /// type, in other words, not a function type. 1147 bool isIncompleteOrObjectType() const { 1148 return !isFunctionType(); 1149 } 1150 1151 /// \brief Determine whether this type is an object type. 1152 bool isObjectType() const { 1153 // C++ [basic.types]p8: 1154 // An object type is a (possibly cv-qualified) type that is not a 1155 // function type, not a reference type, and not a void type. 1156 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1157 } 1158 1159 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1160 bool isPODType() const; 1161 1162 /// isLiteralType - Return true if this is a literal type 1163 /// (C++0x [basic.types]p10) 1164 bool isLiteralType() const; 1165 1166 /// Helper methods to distinguish type categories. All type predicates 1167 /// operate on the canonical type, ignoring typedefs and qualifiers. 1168 1169 /// isBuiltinType - returns true if the type is a builtin type. 1170 bool isBuiltinType() const; 1171 1172 /// isSpecificBuiltinType - Test for a particular builtin type. 1173 bool isSpecificBuiltinType(unsigned K) const; 1174 1175 /// isPlaceholderType - Test for a type which does not represent an 1176 /// actual type-system type but is instead used as a placeholder for 1177 /// various convenient purposes within Clang. All such types are 1178 /// BuiltinTypes. 1179 bool isPlaceholderType() const; 1180 1181 /// isIntegerType() does *not* include complex integers (a GCC extension). 1182 /// isComplexIntegerType() can be used to test for complex integers. 1183 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1184 bool isEnumeralType() const; 1185 bool isBooleanType() const; 1186 bool isCharType() const; 1187 bool isWideCharType() const; 1188 bool isAnyCharacterType() const; 1189 bool isIntegralType(ASTContext &Ctx) const; 1190 1191 /// \brief Determine whether this type is an integral or enumeration type. 1192 bool isIntegralOrEnumerationType() const; 1193 /// \brief Determine whether this type is an integral or unscoped enumeration 1194 /// type. 1195 bool isIntegralOrUnscopedEnumerationType() const; 1196 1197 /// Floating point categories. 1198 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1199 /// isComplexType() does *not* include complex integers (a GCC extension). 1200 /// isComplexIntegerType() can be used to test for complex integers. 1201 bool isComplexType() const; // C99 6.2.5p11 (complex) 1202 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1203 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1204 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1205 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1206 bool isVoidType() const; // C99 6.2.5p19 1207 bool isDerivedType() const; // C99 6.2.5p20 1208 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1209 bool isAggregateType() const; 1210 1211 // Type Predicates: Check to see if this type is structurally the specified 1212 // type, ignoring typedefs and qualifiers. 1213 bool isFunctionType() const; 1214 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1215 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1216 bool isPointerType() const; 1217 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1218 bool isBlockPointerType() const; 1219 bool isVoidPointerType() const; 1220 bool isReferenceType() const; 1221 bool isLValueReferenceType() const; 1222 bool isRValueReferenceType() const; 1223 bool isFunctionPointerType() const; 1224 bool isMemberPointerType() const; 1225 bool isMemberFunctionPointerType() const; 1226 bool isMemberDataPointerType() const; 1227 bool isArrayType() const; 1228 bool isConstantArrayType() const; 1229 bool isIncompleteArrayType() const; 1230 bool isVariableArrayType() const; 1231 bool isDependentSizedArrayType() const; 1232 bool isRecordType() const; 1233 bool isClassType() const; 1234 bool isStructureType() const; 1235 bool isStructureOrClassType() const; 1236 bool isUnionType() const; 1237 bool isComplexIntegerType() const; // GCC _Complex integer type. 1238 bool isVectorType() const; // GCC vector type. 1239 bool isExtVectorType() const; // Extended vector type. 1240 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1241 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1242 // for the common case. 1243 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1244 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1245 bool isObjCQualifiedIdType() const; // id<foo> 1246 bool isObjCQualifiedClassType() const; // Class<foo> 1247 bool isObjCObjectOrInterfaceType() const; 1248 bool isObjCIdType() const; // id 1249 bool isObjCClassType() const; // Class 1250 bool isObjCSelType() const; // Class 1251 bool isObjCBuiltinType() const; // 'id' or 'Class' 1252 bool isTemplateTypeParmType() const; // C++ template type parameter 1253 bool isNullPtrType() const; // C++0x nullptr_t 1254 1255 enum ScalarTypeKind { 1256 STK_Pointer, 1257 STK_MemberPointer, 1258 STK_Bool, 1259 STK_Integral, 1260 STK_Floating, 1261 STK_IntegralComplex, 1262 STK_FloatingComplex 1263 }; 1264 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1265 ScalarTypeKind getScalarTypeKind() const; 1266 1267 /// isDependentType - Whether this type is a dependent type, meaning 1268 /// that its definition somehow depends on a template parameter 1269 /// (C++ [temp.dep.type]). 1270 bool isDependentType() const { return TypeBits.Dependent; } 1271 1272 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1273 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1274 1275 /// \brief Whether this type involves a variable-length array type 1276 /// with a definite size. 1277 bool hasSizedVLAType() const; 1278 1279 /// \brief Whether this type is or contains a local or unnamed type. 1280 bool hasUnnamedOrLocalType() const; 1281 1282 bool isOverloadableType() const; 1283 1284 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1285 bool isElaboratedTypeSpecifier() const; 1286 1287 /// hasPointerRepresentation - Whether this type is represented 1288 /// natively as a pointer; this includes pointers, references, block 1289 /// pointers, and Objective-C interface, qualified id, and qualified 1290 /// interface types, as well as nullptr_t. 1291 bool hasPointerRepresentation() const; 1292 1293 /// hasObjCPointerRepresentation - Whether this type can represent 1294 /// an objective pointer type for the purpose of GC'ability 1295 bool hasObjCPointerRepresentation() const; 1296 1297 /// \brief Determine whether this type has an integer representation 1298 /// of some sort, e.g., it is an integer type or a vector. 1299 bool hasIntegerRepresentation() const; 1300 1301 /// \brief Determine whether this type has an signed integer representation 1302 /// of some sort, e.g., it is an signed integer type or a vector. 1303 bool hasSignedIntegerRepresentation() const; 1304 1305 /// \brief Determine whether this type has an unsigned integer representation 1306 /// of some sort, e.g., it is an unsigned integer type or a vector. 1307 bool hasUnsignedIntegerRepresentation() const; 1308 1309 /// \brief Determine whether this type has a floating-point representation 1310 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1311 bool hasFloatingRepresentation() const; 1312 1313 // Type Checking Functions: Check to see if this type is structurally the 1314 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1315 // the best type we can. 1316 const RecordType *getAsStructureType() const; 1317 /// NOTE: getAs*ArrayType are methods on ASTContext. 1318 const RecordType *getAsUnionType() const; 1319 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1320 // The following is a convenience method that returns an ObjCObjectPointerType 1321 // for object declared using an interface. 1322 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1323 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1324 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1325 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1326 1327 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1328 /// because the type is a RecordType or because it is the injected-class-name 1329 /// type of a class template or class template partial specialization. 1330 CXXRecordDecl *getAsCXXRecordDecl() const; 1331 1332 /// \brief Get the AutoType whose type will be deduced for a variable with 1333 /// an initializer of this type. This looks through declarators like pointer 1334 /// types, but not through decltype or typedefs. 1335 AutoType *getContainedAutoType() const; 1336 1337 /// Member-template getAs<specific type>'. Look through sugar for 1338 /// an instance of <specific type>. This scheme will eventually 1339 /// replace the specific getAsXXXX methods above. 1340 /// 1341 /// There are some specializations of this member template listed 1342 /// immediately following this class. 1343 template <typename T> const T *getAs() const; 1344 1345 /// A variant of getAs<> for array types which silently discards 1346 /// qualifiers from the outermost type. 1347 const ArrayType *getAsArrayTypeUnsafe() const; 1348 1349 /// Member-template castAs<specific type>. Look through sugar for 1350 /// the underlying instance of <specific type>. 1351 /// 1352 /// This method has the same relationship to getAs<T> as cast<T> has 1353 /// to dyn_cast<T>; which is to say, the underlying type *must* 1354 /// have the intended type, and this method will never return null. 1355 template <typename T> const T *castAs() const; 1356 1357 /// A variant of castAs<> for array type which silently discards 1358 /// qualifiers from the outermost type. 1359 const ArrayType *castAsArrayTypeUnsafe() const; 1360 1361 /// getBaseElementTypeUnsafe - Get the base element type of this 1362 /// type, potentially discarding type qualifiers. This method 1363 /// should never be used when type qualifiers are meaningful. 1364 const Type *getBaseElementTypeUnsafe() const; 1365 1366 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1367 /// element type of the array, potentially with type qualifiers missing. 1368 /// This method should never be used when type qualifiers are meaningful. 1369 const Type *getArrayElementTypeNoTypeQual() const; 1370 1371 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1372 /// pointer, this returns the respective pointee. 1373 QualType getPointeeType() const; 1374 1375 /// getUnqualifiedDesugaredType() - Return the specified type with 1376 /// any "sugar" removed from the type, removing any typedefs, 1377 /// typeofs, etc., as well as any qualifiers. 1378 const Type *getUnqualifiedDesugaredType() const; 1379 1380 /// More type predicates useful for type checking/promotion 1381 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1382 1383 /// isSignedIntegerType - Return true if this is an integer type that is 1384 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1385 /// an enum decl which has a signed representation, or a vector of signed 1386 /// integer element type. 1387 bool isSignedIntegerType() const; 1388 1389 /// isUnsignedIntegerType - Return true if this is an integer type that is 1390 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1391 /// decl which has an unsigned representation, or a vector of unsigned integer 1392 /// element type. 1393 bool isUnsignedIntegerType() const; 1394 1395 /// isConstantSizeType - Return true if this is not a variable sized type, 1396 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1397 /// incomplete types. 1398 bool isConstantSizeType() const; 1399 1400 /// isSpecifierType - Returns true if this type can be represented by some 1401 /// set of type specifiers. 1402 bool isSpecifierType() const; 1403 1404 /// \brief Determine the linkage of this type. 1405 Linkage getLinkage() const; 1406 1407 /// \brief Determine the visibility of this type. 1408 Visibility getVisibility() const; 1409 1410 /// \brief Determine the linkage and visibility of this type. 1411 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1412 1413 /// \brief Note that the linkage is no longer known. 1414 void ClearLinkageCache(); 1415 1416 const char *getTypeClassName() const; 1417 1418 QualType getCanonicalTypeInternal() const { 1419 return CanonicalType; 1420 } 1421 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1422 void dump() const; 1423 static bool classof(const Type *) { return true; } 1424 1425 friend class ASTReader; 1426 friend class ASTWriter; 1427}; 1428 1429template <> inline const TypedefType *Type::getAs() const { 1430 return dyn_cast<TypedefType>(this); 1431} 1432 1433// We can do canonical leaf types faster, because we don't have to 1434// worry about preserving child type decoration. 1435#define TYPE(Class, Base) 1436#define LEAF_TYPE(Class) \ 1437template <> inline const Class##Type *Type::getAs() const { \ 1438 return dyn_cast<Class##Type>(CanonicalType); \ 1439} \ 1440template <> inline const Class##Type *Type::castAs() const { \ 1441 return cast<Class##Type>(CanonicalType); \ 1442} 1443#include "clang/AST/TypeNodes.def" 1444 1445 1446/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1447/// types are always canonical and have a literal name field. 1448class BuiltinType : public Type { 1449public: 1450 enum Kind { 1451 Void, 1452 1453 Bool, // This is bool and/or _Bool. 1454 Char_U, // This is 'char' for targets where char is unsigned. 1455 UChar, // This is explicitly qualified unsigned char. 1456 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1457 Char16, // This is 'char16_t' for C++. 1458 Char32, // This is 'char32_t' for C++. 1459 UShort, 1460 UInt, 1461 ULong, 1462 ULongLong, 1463 UInt128, // __uint128_t 1464 1465 Char_S, // This is 'char' for targets where char is signed. 1466 SChar, // This is explicitly qualified signed char. 1467 WChar_S, // This is 'wchar_t' for C++, when signed. 1468 Short, 1469 Int, 1470 Long, 1471 LongLong, 1472 Int128, // __int128_t 1473 1474 Float, Double, LongDouble, 1475 1476 NullPtr, // This is the type of C++0x 'nullptr'. 1477 1478 /// This represents the type of an expression whose type is 1479 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1480 /// appear in situations where the structure of the type is 1481 /// theoretically deducible. 1482 Dependent, 1483 1484 Overload, // This represents the type of an overloaded function declaration. 1485 1486 /// The primitive Objective C 'id' type. The type pointed to by the 1487 /// user-visible 'id' type. Only ever shows up in an AST as the base 1488 /// type of an ObjCObjectType. 1489 ObjCId, 1490 1491 /// The primitive Objective C 'Class' type. The type pointed to by the 1492 /// user-visible 'Class' type. Only ever shows up in an AST as the 1493 /// base type of an ObjCObjectType. 1494 ObjCClass, 1495 1496 ObjCSel // This represents the ObjC 'SEL' type. 1497 }; 1498 1499public: 1500 BuiltinType(Kind K) 1501 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1502 /*VariablyModified=*/false, 1503 /*Unexpanded paramter pack=*/false) { 1504 BuiltinTypeBits.Kind = K; 1505 } 1506 1507 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1508 const char *getName(const LangOptions &LO) const; 1509 1510 bool isSugared() const { return false; } 1511 QualType desugar() const { return QualType(this, 0); } 1512 1513 bool isInteger() const { 1514 return getKind() >= Bool && getKind() <= Int128; 1515 } 1516 1517 bool isSignedInteger() const { 1518 return getKind() >= Char_S && getKind() <= Int128; 1519 } 1520 1521 bool isUnsignedInteger() const { 1522 return getKind() >= Bool && getKind() <= UInt128; 1523 } 1524 1525 bool isFloatingPoint() const { 1526 return getKind() >= Float && getKind() <= LongDouble; 1527 } 1528 1529 /// Determines whether this type is a "forbidden" placeholder type, 1530 /// i.e. a type which cannot appear in arbitrary positions in a 1531 /// fully-formed expression. 1532 bool isPlaceholderType() const { 1533 return getKind() == Overload; 1534 } 1535 1536 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1537 static bool classof(const BuiltinType *) { return true; } 1538}; 1539 1540/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1541/// types (_Complex float etc) as well as the GCC integer complex extensions. 1542/// 1543class ComplexType : public Type, public llvm::FoldingSetNode { 1544 QualType ElementType; 1545 ComplexType(QualType Element, QualType CanonicalPtr) : 1546 Type(Complex, CanonicalPtr, Element->isDependentType(), 1547 Element->isVariablyModifiedType(), 1548 Element->containsUnexpandedParameterPack()), 1549 ElementType(Element) { 1550 } 1551 friend class ASTContext; // ASTContext creates these. 1552 1553public: 1554 QualType getElementType() const { return ElementType; } 1555 1556 bool isSugared() const { return false; } 1557 QualType desugar() const { return QualType(this, 0); } 1558 1559 void Profile(llvm::FoldingSetNodeID &ID) { 1560 Profile(ID, getElementType()); 1561 } 1562 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1563 ID.AddPointer(Element.getAsOpaquePtr()); 1564 } 1565 1566 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1567 static bool classof(const ComplexType *) { return true; } 1568}; 1569 1570/// ParenType - Sugar for parentheses used when specifying types. 1571/// 1572class ParenType : public Type, public llvm::FoldingSetNode { 1573 QualType Inner; 1574 1575 ParenType(QualType InnerType, QualType CanonType) : 1576 Type(Paren, CanonType, InnerType->isDependentType(), 1577 InnerType->isVariablyModifiedType(), 1578 InnerType->containsUnexpandedParameterPack()), 1579 Inner(InnerType) { 1580 } 1581 friend class ASTContext; // ASTContext creates these. 1582 1583public: 1584 1585 QualType getInnerType() const { return Inner; } 1586 1587 bool isSugared() const { return true; } 1588 QualType desugar() const { return getInnerType(); } 1589 1590 void Profile(llvm::FoldingSetNodeID &ID) { 1591 Profile(ID, getInnerType()); 1592 } 1593 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1594 Inner.Profile(ID); 1595 } 1596 1597 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1598 static bool classof(const ParenType *) { return true; } 1599}; 1600 1601/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1602/// 1603class PointerType : public Type, public llvm::FoldingSetNode { 1604 QualType PointeeType; 1605 1606 PointerType(QualType Pointee, QualType CanonicalPtr) : 1607 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1608 Pointee->isVariablyModifiedType(), 1609 Pointee->containsUnexpandedParameterPack()), 1610 PointeeType(Pointee) { 1611 } 1612 friend class ASTContext; // ASTContext creates these. 1613 1614public: 1615 1616 QualType getPointeeType() const { return PointeeType; } 1617 1618 bool isSugared() const { return false; } 1619 QualType desugar() const { return QualType(this, 0); } 1620 1621 void Profile(llvm::FoldingSetNodeID &ID) { 1622 Profile(ID, getPointeeType()); 1623 } 1624 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1625 ID.AddPointer(Pointee.getAsOpaquePtr()); 1626 } 1627 1628 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1629 static bool classof(const PointerType *) { return true; } 1630}; 1631 1632/// BlockPointerType - pointer to a block type. 1633/// This type is to represent types syntactically represented as 1634/// "void (^)(int)", etc. Pointee is required to always be a function type. 1635/// 1636class BlockPointerType : public Type, public llvm::FoldingSetNode { 1637 QualType PointeeType; // Block is some kind of pointer type 1638 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1639 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1640 Pointee->isVariablyModifiedType(), 1641 Pointee->containsUnexpandedParameterPack()), 1642 PointeeType(Pointee) { 1643 } 1644 friend class ASTContext; // ASTContext creates these. 1645 1646public: 1647 1648 // Get the pointee type. Pointee is required to always be a function type. 1649 QualType getPointeeType() const { return PointeeType; } 1650 1651 bool isSugared() const { return false; } 1652 QualType desugar() const { return QualType(this, 0); } 1653 1654 void Profile(llvm::FoldingSetNodeID &ID) { 1655 Profile(ID, getPointeeType()); 1656 } 1657 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1658 ID.AddPointer(Pointee.getAsOpaquePtr()); 1659 } 1660 1661 static bool classof(const Type *T) { 1662 return T->getTypeClass() == BlockPointer; 1663 } 1664 static bool classof(const BlockPointerType *) { return true; } 1665}; 1666 1667/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1668/// 1669class ReferenceType : public Type, public llvm::FoldingSetNode { 1670 QualType PointeeType; 1671 1672protected: 1673 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1674 bool SpelledAsLValue) : 1675 Type(tc, CanonicalRef, Referencee->isDependentType(), 1676 Referencee->isVariablyModifiedType(), 1677 Referencee->containsUnexpandedParameterPack()), 1678 PointeeType(Referencee) 1679 { 1680 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1681 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1682 } 1683 1684public: 1685 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1686 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1687 1688 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1689 QualType getPointeeType() const { 1690 // FIXME: this might strip inner qualifiers; okay? 1691 const ReferenceType *T = this; 1692 while (T->isInnerRef()) 1693 T = T->PointeeType->castAs<ReferenceType>(); 1694 return T->PointeeType; 1695 } 1696 1697 void Profile(llvm::FoldingSetNodeID &ID) { 1698 Profile(ID, PointeeType, isSpelledAsLValue()); 1699 } 1700 static void Profile(llvm::FoldingSetNodeID &ID, 1701 QualType Referencee, 1702 bool SpelledAsLValue) { 1703 ID.AddPointer(Referencee.getAsOpaquePtr()); 1704 ID.AddBoolean(SpelledAsLValue); 1705 } 1706 1707 static bool classof(const Type *T) { 1708 return T->getTypeClass() == LValueReference || 1709 T->getTypeClass() == RValueReference; 1710 } 1711 static bool classof(const ReferenceType *) { return true; } 1712}; 1713 1714/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1715/// 1716class LValueReferenceType : public ReferenceType { 1717 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1718 bool SpelledAsLValue) : 1719 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1720 {} 1721 friend class ASTContext; // ASTContext creates these 1722public: 1723 bool isSugared() const { return false; } 1724 QualType desugar() const { return QualType(this, 0); } 1725 1726 static bool classof(const Type *T) { 1727 return T->getTypeClass() == LValueReference; 1728 } 1729 static bool classof(const LValueReferenceType *) { return true; } 1730}; 1731 1732/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1733/// 1734class RValueReferenceType : public ReferenceType { 1735 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1736 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1737 } 1738 friend class ASTContext; // ASTContext creates these 1739public: 1740 bool isSugared() const { return false; } 1741 QualType desugar() const { return QualType(this, 0); } 1742 1743 static bool classof(const Type *T) { 1744 return T->getTypeClass() == RValueReference; 1745 } 1746 static bool classof(const RValueReferenceType *) { return true; } 1747}; 1748 1749/// MemberPointerType - C++ 8.3.3 - Pointers to members 1750/// 1751class MemberPointerType : public Type, public llvm::FoldingSetNode { 1752 QualType PointeeType; 1753 /// The class of which the pointee is a member. Must ultimately be a 1754 /// RecordType, but could be a typedef or a template parameter too. 1755 const Type *Class; 1756 1757 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1758 Type(MemberPointer, CanonicalPtr, 1759 Cls->isDependentType() || Pointee->isDependentType(), 1760 Pointee->isVariablyModifiedType(), 1761 (Cls->containsUnexpandedParameterPack() || 1762 Pointee->containsUnexpandedParameterPack())), 1763 PointeeType(Pointee), Class(Cls) { 1764 } 1765 friend class ASTContext; // ASTContext creates these. 1766 1767public: 1768 QualType getPointeeType() const { return PointeeType; } 1769 1770 /// Returns true if the member type (i.e. the pointee type) is a 1771 /// function type rather than a data-member type. 1772 bool isMemberFunctionPointer() const { 1773 return PointeeType->isFunctionProtoType(); 1774 } 1775 1776 /// Returns true if the member type (i.e. the pointee type) is a 1777 /// data type rather than a function type. 1778 bool isMemberDataPointer() const { 1779 return !PointeeType->isFunctionProtoType(); 1780 } 1781 1782 const Type *getClass() const { return Class; } 1783 1784 bool isSugared() const { return false; } 1785 QualType desugar() const { return QualType(this, 0); } 1786 1787 void Profile(llvm::FoldingSetNodeID &ID) { 1788 Profile(ID, getPointeeType(), getClass()); 1789 } 1790 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1791 const Type *Class) { 1792 ID.AddPointer(Pointee.getAsOpaquePtr()); 1793 ID.AddPointer(Class); 1794 } 1795 1796 static bool classof(const Type *T) { 1797 return T->getTypeClass() == MemberPointer; 1798 } 1799 static bool classof(const MemberPointerType *) { return true; } 1800}; 1801 1802/// ArrayType - C99 6.7.5.2 - Array Declarators. 1803/// 1804class ArrayType : public Type, public llvm::FoldingSetNode { 1805public: 1806 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1807 /// an array with a static size (e.g. int X[static 4]), or an array 1808 /// with a star size (e.g. int X[*]). 1809 /// 'static' is only allowed on function parameters. 1810 enum ArraySizeModifier { 1811 Normal, Static, Star 1812 }; 1813private: 1814 /// ElementType - The element type of the array. 1815 QualType ElementType; 1816 1817protected: 1818 // C++ [temp.dep.type]p1: 1819 // A type is dependent if it is... 1820 // - an array type constructed from any dependent type or whose 1821 // size is specified by a constant expression that is 1822 // value-dependent, 1823 ArrayType(TypeClass tc, QualType et, QualType can, 1824 ArraySizeModifier sm, unsigned tq, 1825 bool ContainsUnexpandedParameterPack) 1826 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1827 (tc == VariableArray || et->isVariablyModifiedType()), 1828 ContainsUnexpandedParameterPack), 1829 ElementType(et) { 1830 ArrayTypeBits.IndexTypeQuals = tq; 1831 ArrayTypeBits.SizeModifier = sm; 1832 } 1833 1834 friend class ASTContext; // ASTContext creates these. 1835 1836public: 1837 QualType getElementType() const { return ElementType; } 1838 ArraySizeModifier getSizeModifier() const { 1839 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1840 } 1841 Qualifiers getIndexTypeQualifiers() const { 1842 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1843 } 1844 unsigned getIndexTypeCVRQualifiers() const { 1845 return ArrayTypeBits.IndexTypeQuals; 1846 } 1847 1848 static bool classof(const Type *T) { 1849 return T->getTypeClass() == ConstantArray || 1850 T->getTypeClass() == VariableArray || 1851 T->getTypeClass() == IncompleteArray || 1852 T->getTypeClass() == DependentSizedArray; 1853 } 1854 static bool classof(const ArrayType *) { return true; } 1855}; 1856 1857/// ConstantArrayType - This class represents the canonical version of 1858/// C arrays with a specified constant size. For example, the canonical 1859/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1860/// type is 'int' and the size is 404. 1861class ConstantArrayType : public ArrayType { 1862 llvm::APInt Size; // Allows us to unique the type. 1863 1864 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1865 ArraySizeModifier sm, unsigned tq) 1866 : ArrayType(ConstantArray, et, can, sm, tq, 1867 et->containsUnexpandedParameterPack()), 1868 Size(size) {} 1869protected: 1870 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1871 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1872 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1873 Size(size) {} 1874 friend class ASTContext; // ASTContext creates these. 1875public: 1876 const llvm::APInt &getSize() const { return Size; } 1877 bool isSugared() const { return false; } 1878 QualType desugar() const { return QualType(this, 0); } 1879 1880 1881 /// \brief Determine the number of bits required to address a member of 1882 // an array with the given element type and number of elements. 1883 static unsigned getNumAddressingBits(ASTContext &Context, 1884 QualType ElementType, 1885 const llvm::APInt &NumElements); 1886 1887 /// \brief Determine the maximum number of active bits that an array's size 1888 /// can require, which limits the maximum size of the array. 1889 static unsigned getMaxSizeBits(ASTContext &Context); 1890 1891 void Profile(llvm::FoldingSetNodeID &ID) { 1892 Profile(ID, getElementType(), getSize(), 1893 getSizeModifier(), getIndexTypeCVRQualifiers()); 1894 } 1895 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1896 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1897 unsigned TypeQuals) { 1898 ID.AddPointer(ET.getAsOpaquePtr()); 1899 ID.AddInteger(ArraySize.getZExtValue()); 1900 ID.AddInteger(SizeMod); 1901 ID.AddInteger(TypeQuals); 1902 } 1903 static bool classof(const Type *T) { 1904 return T->getTypeClass() == ConstantArray; 1905 } 1906 static bool classof(const ConstantArrayType *) { return true; } 1907}; 1908 1909/// IncompleteArrayType - This class represents C arrays with an unspecified 1910/// size. For example 'int A[]' has an IncompleteArrayType where the element 1911/// type is 'int' and the size is unspecified. 1912class IncompleteArrayType : public ArrayType { 1913 1914 IncompleteArrayType(QualType et, QualType can, 1915 ArraySizeModifier sm, unsigned tq) 1916 : ArrayType(IncompleteArray, et, can, sm, tq, 1917 et->containsUnexpandedParameterPack()) {} 1918 friend class ASTContext; // ASTContext creates these. 1919public: 1920 bool isSugared() const { return false; } 1921 QualType desugar() const { return QualType(this, 0); } 1922 1923 static bool classof(const Type *T) { 1924 return T->getTypeClass() == IncompleteArray; 1925 } 1926 static bool classof(const IncompleteArrayType *) { return true; } 1927 1928 friend class StmtIteratorBase; 1929 1930 void Profile(llvm::FoldingSetNodeID &ID) { 1931 Profile(ID, getElementType(), getSizeModifier(), 1932 getIndexTypeCVRQualifiers()); 1933 } 1934 1935 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1936 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1937 ID.AddPointer(ET.getAsOpaquePtr()); 1938 ID.AddInteger(SizeMod); 1939 ID.AddInteger(TypeQuals); 1940 } 1941}; 1942 1943/// VariableArrayType - This class represents C arrays with a specified size 1944/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1945/// Since the size expression is an arbitrary expression, we store it as such. 1946/// 1947/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1948/// should not be: two lexically equivalent variable array types could mean 1949/// different things, for example, these variables do not have the same type 1950/// dynamically: 1951/// 1952/// void foo(int x) { 1953/// int Y[x]; 1954/// ++x; 1955/// int Z[x]; 1956/// } 1957/// 1958class VariableArrayType : public ArrayType { 1959 /// SizeExpr - An assignment expression. VLA's are only permitted within 1960 /// a function block. 1961 Stmt *SizeExpr; 1962 /// Brackets - The left and right array brackets. 1963 SourceRange Brackets; 1964 1965 VariableArrayType(QualType et, QualType can, Expr *e, 1966 ArraySizeModifier sm, unsigned tq, 1967 SourceRange brackets) 1968 : ArrayType(VariableArray, et, can, sm, tq, 1969 et->containsUnexpandedParameterPack()), 1970 SizeExpr((Stmt*) e), Brackets(brackets) {} 1971 friend class ASTContext; // ASTContext creates these. 1972 1973public: 1974 Expr *getSizeExpr() const { 1975 // We use C-style casts instead of cast<> here because we do not wish 1976 // to have a dependency of Type.h on Stmt.h/Expr.h. 1977 return (Expr*) SizeExpr; 1978 } 1979 SourceRange getBracketsRange() const { return Brackets; } 1980 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1981 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1982 1983 bool isSugared() const { return false; } 1984 QualType desugar() const { return QualType(this, 0); } 1985 1986 static bool classof(const Type *T) { 1987 return T->getTypeClass() == VariableArray; 1988 } 1989 static bool classof(const VariableArrayType *) { return true; } 1990 1991 friend class StmtIteratorBase; 1992 1993 void Profile(llvm::FoldingSetNodeID &ID) { 1994 assert(0 && "Cannnot unique VariableArrayTypes."); 1995 } 1996}; 1997 1998/// DependentSizedArrayType - This type represents an array type in 1999/// C++ whose size is a value-dependent expression. For example: 2000/// 2001/// \code 2002/// template<typename T, int Size> 2003/// class array { 2004/// T data[Size]; 2005/// }; 2006/// \endcode 2007/// 2008/// For these types, we won't actually know what the array bound is 2009/// until template instantiation occurs, at which point this will 2010/// become either a ConstantArrayType or a VariableArrayType. 2011class DependentSizedArrayType : public ArrayType { 2012 const ASTContext &Context; 2013 2014 /// \brief An assignment expression that will instantiate to the 2015 /// size of the array. 2016 /// 2017 /// The expression itself might be NULL, in which case the array 2018 /// type will have its size deduced from an initializer. 2019 Stmt *SizeExpr; 2020 2021 /// Brackets - The left and right array brackets. 2022 SourceRange Brackets; 2023 2024 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2025 Expr *e, ArraySizeModifier sm, unsigned tq, 2026 SourceRange brackets); 2027 2028 friend class ASTContext; // ASTContext creates these. 2029 2030public: 2031 Expr *getSizeExpr() const { 2032 // We use C-style casts instead of cast<> here because we do not wish 2033 // to have a dependency of Type.h on Stmt.h/Expr.h. 2034 return (Expr*) SizeExpr; 2035 } 2036 SourceRange getBracketsRange() const { return Brackets; } 2037 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2038 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2039 2040 bool isSugared() const { return false; } 2041 QualType desugar() const { return QualType(this, 0); } 2042 2043 static bool classof(const Type *T) { 2044 return T->getTypeClass() == DependentSizedArray; 2045 } 2046 static bool classof(const DependentSizedArrayType *) { return true; } 2047 2048 friend class StmtIteratorBase; 2049 2050 2051 void Profile(llvm::FoldingSetNodeID &ID) { 2052 Profile(ID, Context, getElementType(), 2053 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2054 } 2055 2056 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2057 QualType ET, ArraySizeModifier SizeMod, 2058 unsigned TypeQuals, Expr *E); 2059}; 2060 2061/// DependentSizedExtVectorType - This type represent an extended vector type 2062/// where either the type or size is dependent. For example: 2063/// @code 2064/// template<typename T, int Size> 2065/// class vector { 2066/// typedef T __attribute__((ext_vector_type(Size))) type; 2067/// } 2068/// @endcode 2069class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2070 const ASTContext &Context; 2071 Expr *SizeExpr; 2072 /// ElementType - The element type of the array. 2073 QualType ElementType; 2074 SourceLocation loc; 2075 2076 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2077 QualType can, Expr *SizeExpr, SourceLocation loc); 2078 2079 friend class ASTContext; 2080 2081public: 2082 Expr *getSizeExpr() const { return SizeExpr; } 2083 QualType getElementType() const { return ElementType; } 2084 SourceLocation getAttributeLoc() const { return loc; } 2085 2086 bool isSugared() const { return false; } 2087 QualType desugar() const { return QualType(this, 0); } 2088 2089 static bool classof(const Type *T) { 2090 return T->getTypeClass() == DependentSizedExtVector; 2091 } 2092 static bool classof(const DependentSizedExtVectorType *) { return true; } 2093 2094 void Profile(llvm::FoldingSetNodeID &ID) { 2095 Profile(ID, Context, getElementType(), getSizeExpr()); 2096 } 2097 2098 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2099 QualType ElementType, Expr *SizeExpr); 2100}; 2101 2102 2103/// VectorType - GCC generic vector type. This type is created using 2104/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2105/// bytes; or from an Altivec __vector or vector declaration. 2106/// Since the constructor takes the number of vector elements, the 2107/// client is responsible for converting the size into the number of elements. 2108class VectorType : public Type, public llvm::FoldingSetNode { 2109public: 2110 enum VectorKind { 2111 GenericVector, // not a target-specific vector type 2112 AltiVecVector, // is AltiVec vector 2113 AltiVecPixel, // is AltiVec 'vector Pixel' 2114 AltiVecBool, // is AltiVec 'vector bool ...' 2115 NeonVector, // is ARM Neon vector 2116 NeonPolyVector // is ARM Neon polynomial vector 2117 }; 2118protected: 2119 /// ElementType - The element type of the vector. 2120 QualType ElementType; 2121 2122 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2123 VectorKind vecKind); 2124 2125 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2126 QualType canonType, VectorKind vecKind); 2127 2128 friend class ASTContext; // ASTContext creates these. 2129 2130public: 2131 2132 QualType getElementType() const { return ElementType; } 2133 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2134 2135 bool isSugared() const { return false; } 2136 QualType desugar() const { return QualType(this, 0); } 2137 2138 VectorKind getVectorKind() const { 2139 return VectorKind(VectorTypeBits.VecKind); 2140 } 2141 2142 void Profile(llvm::FoldingSetNodeID &ID) { 2143 Profile(ID, getElementType(), getNumElements(), 2144 getTypeClass(), getVectorKind()); 2145 } 2146 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2147 unsigned NumElements, TypeClass TypeClass, 2148 VectorKind VecKind) { 2149 ID.AddPointer(ElementType.getAsOpaquePtr()); 2150 ID.AddInteger(NumElements); 2151 ID.AddInteger(TypeClass); 2152 ID.AddInteger(VecKind); 2153 } 2154 2155 static bool classof(const Type *T) { 2156 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2157 } 2158 static bool classof(const VectorType *) { return true; } 2159}; 2160 2161/// ExtVectorType - Extended vector type. This type is created using 2162/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2163/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2164/// class enables syntactic extensions, like Vector Components for accessing 2165/// points, colors, and textures (modeled after OpenGL Shading Language). 2166class ExtVectorType : public VectorType { 2167 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2168 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2169 friend class ASTContext; // ASTContext creates these. 2170public: 2171 static int getPointAccessorIdx(char c) { 2172 switch (c) { 2173 default: return -1; 2174 case 'x': return 0; 2175 case 'y': return 1; 2176 case 'z': return 2; 2177 case 'w': return 3; 2178 } 2179 } 2180 static int getNumericAccessorIdx(char c) { 2181 switch (c) { 2182 default: return -1; 2183 case '0': return 0; 2184 case '1': return 1; 2185 case '2': return 2; 2186 case '3': return 3; 2187 case '4': return 4; 2188 case '5': return 5; 2189 case '6': return 6; 2190 case '7': return 7; 2191 case '8': return 8; 2192 case '9': return 9; 2193 case 'A': 2194 case 'a': return 10; 2195 case 'B': 2196 case 'b': return 11; 2197 case 'C': 2198 case 'c': return 12; 2199 case 'D': 2200 case 'd': return 13; 2201 case 'E': 2202 case 'e': return 14; 2203 case 'F': 2204 case 'f': return 15; 2205 } 2206 } 2207 2208 static int getAccessorIdx(char c) { 2209 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2210 return getNumericAccessorIdx(c); 2211 } 2212 2213 bool isAccessorWithinNumElements(char c) const { 2214 if (int idx = getAccessorIdx(c)+1) 2215 return unsigned(idx-1) < getNumElements(); 2216 return false; 2217 } 2218 bool isSugared() const { return false; } 2219 QualType desugar() const { return QualType(this, 0); } 2220 2221 static bool classof(const Type *T) { 2222 return T->getTypeClass() == ExtVector; 2223 } 2224 static bool classof(const ExtVectorType *) { return true; } 2225}; 2226 2227/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2228/// class of FunctionNoProtoType and FunctionProtoType. 2229/// 2230class FunctionType : public Type { 2231 // The type returned by the function. 2232 QualType ResultType; 2233 2234 public: 2235 /// ExtInfo - A class which abstracts out some details necessary for 2236 /// making a call. 2237 /// 2238 /// It is not actually used directly for storing this information in 2239 /// a FunctionType, although FunctionType does currently use the 2240 /// same bit-pattern. 2241 /// 2242 // If you add a field (say Foo), other than the obvious places (both, 2243 // constructors, compile failures), what you need to update is 2244 // * Operator== 2245 // * getFoo 2246 // * withFoo 2247 // * functionType. Add Foo, getFoo. 2248 // * ASTContext::getFooType 2249 // * ASTContext::mergeFunctionTypes 2250 // * FunctionNoProtoType::Profile 2251 // * FunctionProtoType::Profile 2252 // * TypePrinter::PrintFunctionProto 2253 // * AST read and write 2254 // * Codegen 2255 class ExtInfo { 2256 // Feel free to rearrange or add bits, but if you go over 8, 2257 // you'll need to adjust both the Bits field below and 2258 // Type::FunctionTypeBitfields. 2259 2260 // | CC |noreturn|regparm 2261 // |0 .. 2| 3 |4 .. 6 2262 enum { CallConvMask = 0x7 }; 2263 enum { NoReturnMask = 0x8 }; 2264 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2265 RegParmOffset = 4 }; 2266 2267 unsigned char Bits; 2268 2269 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2270 2271 friend class FunctionType; 2272 2273 public: 2274 // Constructor with no defaults. Use this when you know that you 2275 // have all the elements (when reading an AST file for example). 2276 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2277 Bits = ((unsigned) cc) | 2278 (noReturn ? NoReturnMask : 0) | 2279 (regParm << RegParmOffset); 2280 } 2281 2282 // Constructor with all defaults. Use when for example creating a 2283 // function know to use defaults. 2284 ExtInfo() : Bits(0) {} 2285 2286 bool getNoReturn() const { return Bits & NoReturnMask; } 2287 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2288 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2289 2290 bool operator==(ExtInfo Other) const { 2291 return Bits == Other.Bits; 2292 } 2293 bool operator!=(ExtInfo Other) const { 2294 return Bits != Other.Bits; 2295 } 2296 2297 // Note that we don't have setters. That is by design, use 2298 // the following with methods instead of mutating these objects. 2299 2300 ExtInfo withNoReturn(bool noReturn) const { 2301 if (noReturn) 2302 return ExtInfo(Bits | NoReturnMask); 2303 else 2304 return ExtInfo(Bits & ~NoReturnMask); 2305 } 2306 2307 ExtInfo withRegParm(unsigned RegParm) const { 2308 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2309 } 2310 2311 ExtInfo withCallingConv(CallingConv cc) const { 2312 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2313 } 2314 2315 void Profile(llvm::FoldingSetNodeID &ID) const { 2316 ID.AddInteger(Bits); 2317 } 2318 }; 2319 2320protected: 2321 FunctionType(TypeClass tc, QualType res, bool variadic, 2322 unsigned typeQuals, RefQualifierKind RefQualifier, 2323 QualType Canonical, bool Dependent, 2324 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2325 ExtInfo Info) 2326 : Type(tc, Canonical, Dependent, VariablyModified, 2327 ContainsUnexpandedParameterPack), 2328 ResultType(res) { 2329 FunctionTypeBits.ExtInfo = Info.Bits; 2330 FunctionTypeBits.Variadic = variadic; 2331 FunctionTypeBits.TypeQuals = typeQuals; 2332 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2333 } 2334 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2335 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2336 2337 RefQualifierKind getRefQualifier() const { 2338 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2339 } 2340 2341public: 2342 2343 QualType getResultType() const { return ResultType; } 2344 2345 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2346 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2347 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2348 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2349 2350 /// \brief Determine the type of an expression that calls a function of 2351 /// this type. 2352 QualType getCallResultType(ASTContext &Context) const { 2353 return getResultType().getNonLValueExprType(Context); 2354 } 2355 2356 static llvm::StringRef getNameForCallConv(CallingConv CC); 2357 2358 static bool classof(const Type *T) { 2359 return T->getTypeClass() == FunctionNoProto || 2360 T->getTypeClass() == FunctionProto; 2361 } 2362 static bool classof(const FunctionType *) { return true; } 2363}; 2364 2365/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2366/// no information available about its arguments. 2367class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2368 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2369 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2370 /*Dependent=*/false, Result->isVariablyModifiedType(), 2371 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2372 2373 friend class ASTContext; // ASTContext creates these. 2374 2375public: 2376 // No additional state past what FunctionType provides. 2377 2378 bool isSugared() const { return false; } 2379 QualType desugar() const { return QualType(this, 0); } 2380 2381 void Profile(llvm::FoldingSetNodeID &ID) { 2382 Profile(ID, getResultType(), getExtInfo()); 2383 } 2384 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2385 ExtInfo Info) { 2386 Info.Profile(ID); 2387 ID.AddPointer(ResultType.getAsOpaquePtr()); 2388 } 2389 2390 static bool classof(const Type *T) { 2391 return T->getTypeClass() == FunctionNoProto; 2392 } 2393 static bool classof(const FunctionNoProtoType *) { return true; } 2394}; 2395 2396/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2397/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2398/// arguments, not as having a single void argument. Such a type can have an 2399/// exception specification, but this specification is not part of the canonical 2400/// type. 2401class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2402public: 2403 /// ExtProtoInfo - Extra information about a function prototype. 2404 struct ExtProtoInfo { 2405 ExtProtoInfo() : 2406 Variadic(false), HasExceptionSpec(false), HasAnyExceptionSpec(false), 2407 TypeQuals(0), RefQualifier(RQ_None), NumExceptions(0), Exceptions(0) {} 2408 2409 FunctionType::ExtInfo ExtInfo; 2410 bool Variadic; 2411 bool HasExceptionSpec; 2412 bool HasAnyExceptionSpec; 2413 unsigned char TypeQuals; 2414 RefQualifierKind RefQualifier; 2415 unsigned NumExceptions; 2416 const QualType *Exceptions; 2417 }; 2418 2419private: 2420 /// \brief Determine whether there are any argument types that 2421 /// contain an unexpanded parameter pack. 2422 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2423 unsigned numArgs) { 2424 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2425 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2426 return true; 2427 2428 return false; 2429 } 2430 2431 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2432 QualType canonical, const ExtProtoInfo &epi); 2433 2434 /// NumArgs - The number of arguments this function has, not counting '...'. 2435 unsigned NumArgs : 20; 2436 2437 /// NumExceptions - The number of types in the exception spec, if any. 2438 unsigned NumExceptions : 10; 2439 2440 /// HasExceptionSpec - Whether this function has an exception spec at all. 2441 unsigned HasExceptionSpec : 1; 2442 2443 /// HasAnyExceptionSpec - Whether this function has a throw(...) spec. 2444 unsigned HasAnyExceptionSpec : 1; 2445 2446 /// ArgInfo - There is an variable size array after the class in memory that 2447 /// holds the argument types. 2448 2449 /// Exceptions - There is another variable size array after ArgInfo that 2450 /// holds the exception types. 2451 2452 friend class ASTContext; // ASTContext creates these. 2453 2454public: 2455 unsigned getNumArgs() const { return NumArgs; } 2456 QualType getArgType(unsigned i) const { 2457 assert(i < NumArgs && "Invalid argument number!"); 2458 return arg_type_begin()[i]; 2459 } 2460 2461 ExtProtoInfo getExtProtoInfo() const { 2462 ExtProtoInfo EPI; 2463 EPI.ExtInfo = getExtInfo(); 2464 EPI.Variadic = isVariadic(); 2465 EPI.HasExceptionSpec = hasExceptionSpec(); 2466 EPI.HasAnyExceptionSpec = hasAnyExceptionSpec(); 2467 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2468 EPI.RefQualifier = getRefQualifier(); 2469 EPI.NumExceptions = NumExceptions; 2470 EPI.Exceptions = exception_begin(); 2471 return EPI; 2472 } 2473 2474 bool hasExceptionSpec() const { return HasExceptionSpec; } 2475 bool hasAnyExceptionSpec() const { return HasAnyExceptionSpec; } 2476 unsigned getNumExceptions() const { return NumExceptions; } 2477 QualType getExceptionType(unsigned i) const { 2478 assert(i < NumExceptions && "Invalid exception number!"); 2479 return exception_begin()[i]; 2480 } 2481 bool hasEmptyExceptionSpec() const { 2482 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2483 getNumExceptions() == 0; 2484 } 2485 2486 using FunctionType::isVariadic; 2487 2488 /// \brief Determines whether this function prototype contains a 2489 /// parameter pack at the end. 2490 /// 2491 /// A function template whose last parameter is a parameter pack can be 2492 /// called with an arbitrary number of arguments, much like a variadic 2493 /// function. However, 2494 bool isTemplateVariadic() const; 2495 2496 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2497 2498 2499 /// \brief Retrieve the ref-qualifier associated with this function type. 2500 RefQualifierKind getRefQualifier() const { 2501 return FunctionType::getRefQualifier(); 2502 } 2503 2504 typedef const QualType *arg_type_iterator; 2505 arg_type_iterator arg_type_begin() const { 2506 return reinterpret_cast<const QualType *>(this+1); 2507 } 2508 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2509 2510 typedef const QualType *exception_iterator; 2511 exception_iterator exception_begin() const { 2512 // exceptions begin where arguments end 2513 return arg_type_end(); 2514 } 2515 exception_iterator exception_end() const { 2516 return exception_begin() + NumExceptions; 2517 } 2518 2519 bool isSugared() const { return false; } 2520 QualType desugar() const { return QualType(this, 0); } 2521 2522 static bool classof(const Type *T) { 2523 return T->getTypeClass() == FunctionProto; 2524 } 2525 static bool classof(const FunctionProtoType *) { return true; } 2526 2527 void Profile(llvm::FoldingSetNodeID &ID); 2528 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2529 arg_type_iterator ArgTys, unsigned NumArgs, 2530 const ExtProtoInfo &EPI); 2531}; 2532 2533 2534/// \brief Represents the dependent type named by a dependently-scoped 2535/// typename using declaration, e.g. 2536/// using typename Base<T>::foo; 2537/// Template instantiation turns these into the underlying type. 2538class UnresolvedUsingType : public Type { 2539 UnresolvedUsingTypenameDecl *Decl; 2540 2541 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2542 : Type(UnresolvedUsing, QualType(), true, false, 2543 /*ContainsUnexpandedParameterPack=*/false), 2544 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2545 friend class ASTContext; // ASTContext creates these. 2546public: 2547 2548 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2549 2550 bool isSugared() const { return false; } 2551 QualType desugar() const { return QualType(this, 0); } 2552 2553 static bool classof(const Type *T) { 2554 return T->getTypeClass() == UnresolvedUsing; 2555 } 2556 static bool classof(const UnresolvedUsingType *) { return true; } 2557 2558 void Profile(llvm::FoldingSetNodeID &ID) { 2559 return Profile(ID, Decl); 2560 } 2561 static void Profile(llvm::FoldingSetNodeID &ID, 2562 UnresolvedUsingTypenameDecl *D) { 2563 ID.AddPointer(D); 2564 } 2565}; 2566 2567 2568class TypedefType : public Type { 2569 TypedefDecl *Decl; 2570protected: 2571 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2572 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2573 /*ContainsUnexpandedParameterPack=*/false), 2574 Decl(const_cast<TypedefDecl*>(D)) { 2575 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2576 } 2577 friend class ASTContext; // ASTContext creates these. 2578public: 2579 2580 TypedefDecl *getDecl() const { return Decl; } 2581 2582 bool isSugared() const { return true; } 2583 QualType desugar() const; 2584 2585 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2586 static bool classof(const TypedefType *) { return true; } 2587}; 2588 2589/// TypeOfExprType (GCC extension). 2590class TypeOfExprType : public Type { 2591 Expr *TOExpr; 2592 2593protected: 2594 TypeOfExprType(Expr *E, QualType can = QualType()); 2595 friend class ASTContext; // ASTContext creates these. 2596public: 2597 Expr *getUnderlyingExpr() const { return TOExpr; } 2598 2599 /// \brief Remove a single level of sugar. 2600 QualType desugar() const; 2601 2602 /// \brief Returns whether this type directly provides sugar. 2603 bool isSugared() const { return true; } 2604 2605 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2606 static bool classof(const TypeOfExprType *) { return true; } 2607}; 2608 2609/// \brief Internal representation of canonical, dependent 2610/// typeof(expr) types. 2611/// 2612/// This class is used internally by the ASTContext to manage 2613/// canonical, dependent types, only. Clients will only see instances 2614/// of this class via TypeOfExprType nodes. 2615class DependentTypeOfExprType 2616 : public TypeOfExprType, public llvm::FoldingSetNode { 2617 const ASTContext &Context; 2618 2619public: 2620 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2621 : TypeOfExprType(E), Context(Context) { } 2622 2623 bool isSugared() const { return false; } 2624 QualType desugar() const { return QualType(this, 0); } 2625 2626 void Profile(llvm::FoldingSetNodeID &ID) { 2627 Profile(ID, Context, getUnderlyingExpr()); 2628 } 2629 2630 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2631 Expr *E); 2632}; 2633 2634/// TypeOfType (GCC extension). 2635class TypeOfType : public Type { 2636 QualType TOType; 2637 TypeOfType(QualType T, QualType can) 2638 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2639 T->containsUnexpandedParameterPack()), 2640 TOType(T) { 2641 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2642 } 2643 friend class ASTContext; // ASTContext creates these. 2644public: 2645 QualType getUnderlyingType() const { return TOType; } 2646 2647 /// \brief Remove a single level of sugar. 2648 QualType desugar() const { return getUnderlyingType(); } 2649 2650 /// \brief Returns whether this type directly provides sugar. 2651 bool isSugared() const { return true; } 2652 2653 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2654 static bool classof(const TypeOfType *) { return true; } 2655}; 2656 2657/// DecltypeType (C++0x) 2658class DecltypeType : public Type { 2659 Expr *E; 2660 2661 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2662 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2663 // from it. 2664 QualType UnderlyingType; 2665 2666protected: 2667 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2668 friend class ASTContext; // ASTContext creates these. 2669public: 2670 Expr *getUnderlyingExpr() const { return E; } 2671 QualType getUnderlyingType() const { return UnderlyingType; } 2672 2673 /// \brief Remove a single level of sugar. 2674 QualType desugar() const { return getUnderlyingType(); } 2675 2676 /// \brief Returns whether this type directly provides sugar. 2677 bool isSugared() const { return !isDependentType(); } 2678 2679 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2680 static bool classof(const DecltypeType *) { return true; } 2681}; 2682 2683/// \brief Internal representation of canonical, dependent 2684/// decltype(expr) types. 2685/// 2686/// This class is used internally by the ASTContext to manage 2687/// canonical, dependent types, only. Clients will only see instances 2688/// of this class via DecltypeType nodes. 2689class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2690 const ASTContext &Context; 2691 2692public: 2693 DependentDecltypeType(const ASTContext &Context, Expr *E); 2694 2695 bool isSugared() const { return false; } 2696 QualType desugar() const { return QualType(this, 0); } 2697 2698 void Profile(llvm::FoldingSetNodeID &ID) { 2699 Profile(ID, Context, getUnderlyingExpr()); 2700 } 2701 2702 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2703 Expr *E); 2704}; 2705 2706class TagType : public Type { 2707 /// Stores the TagDecl associated with this type. The decl may point to any 2708 /// TagDecl that declares the entity. 2709 TagDecl * decl; 2710 2711protected: 2712 TagType(TypeClass TC, const TagDecl *D, QualType can); 2713 2714public: 2715 TagDecl *getDecl() const; 2716 2717 /// @brief Determines whether this type is in the process of being 2718 /// defined. 2719 bool isBeingDefined() const; 2720 2721 static bool classof(const Type *T) { 2722 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2723 } 2724 static bool classof(const TagType *) { return true; } 2725 static bool classof(const RecordType *) { return true; } 2726 static bool classof(const EnumType *) { return true; } 2727}; 2728 2729/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2730/// to detect TagType objects of structs/unions/classes. 2731class RecordType : public TagType { 2732protected: 2733 explicit RecordType(const RecordDecl *D) 2734 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2735 explicit RecordType(TypeClass TC, RecordDecl *D) 2736 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2737 friend class ASTContext; // ASTContext creates these. 2738public: 2739 2740 RecordDecl *getDecl() const { 2741 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2742 } 2743 2744 // FIXME: This predicate is a helper to QualType/Type. It needs to 2745 // recursively check all fields for const-ness. If any field is declared 2746 // const, it needs to return false. 2747 bool hasConstFields() const { return false; } 2748 2749 bool isSugared() const { return false; } 2750 QualType desugar() const { return QualType(this, 0); } 2751 2752 static bool classof(const TagType *T); 2753 static bool classof(const Type *T) { 2754 return isa<TagType>(T) && classof(cast<TagType>(T)); 2755 } 2756 static bool classof(const RecordType *) { return true; } 2757}; 2758 2759/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2760/// to detect TagType objects of enums. 2761class EnumType : public TagType { 2762 explicit EnumType(const EnumDecl *D) 2763 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2764 friend class ASTContext; // ASTContext creates these. 2765public: 2766 2767 EnumDecl *getDecl() const { 2768 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2769 } 2770 2771 bool isSugared() const { return false; } 2772 QualType desugar() const { return QualType(this, 0); } 2773 2774 static bool classof(const TagType *T); 2775 static bool classof(const Type *T) { 2776 return isa<TagType>(T) && classof(cast<TagType>(T)); 2777 } 2778 static bool classof(const EnumType *) { return true; } 2779}; 2780 2781/// AttributedType - An attributed type is a type to which a type 2782/// attribute has been applied. The "modified type" is the 2783/// fully-sugared type to which the attributed type was applied; 2784/// generally it is not canonically equivalent to the attributed type. 2785/// The "equivalent type" is the minimally-desugared type which the 2786/// type is canonically equivalent to. 2787/// 2788/// For example, in the following attributed type: 2789/// int32_t __attribute__((vector_size(16))) 2790/// - the modified type is the TypedefType for int32_t 2791/// - the equivalent type is VectorType(16, int32_t) 2792/// - the canonical type is VectorType(16, int) 2793class AttributedType : public Type, public llvm::FoldingSetNode { 2794public: 2795 // It is really silly to have yet another attribute-kind enum, but 2796 // clang::attr::Kind doesn't currently cover the pure type attrs. 2797 enum Kind { 2798 // Expression operand. 2799 attr_address_space, 2800 attr_regparm, 2801 attr_vector_size, 2802 attr_neon_vector_type, 2803 attr_neon_polyvector_type, 2804 2805 FirstExprOperandKind = attr_address_space, 2806 LastExprOperandKind = attr_neon_polyvector_type, 2807 2808 // Enumerated operand (string or keyword). 2809 attr_objc_gc, 2810 2811 FirstEnumOperandKind = attr_objc_gc, 2812 LastEnumOperandKind = attr_objc_gc, 2813 2814 // No operand. 2815 attr_noreturn, 2816 attr_cdecl, 2817 attr_fastcall, 2818 attr_stdcall, 2819 attr_thiscall, 2820 attr_pascal 2821 }; 2822 2823private: 2824 QualType ModifiedType; 2825 QualType EquivalentType; 2826 2827 friend class ASTContext; // creates these 2828 2829 AttributedType(QualType canon, Kind attrKind, 2830 QualType modified, QualType equivalent) 2831 : Type(Attributed, canon, canon->isDependentType(), 2832 canon->isVariablyModifiedType(), 2833 canon->containsUnexpandedParameterPack()), 2834 ModifiedType(modified), EquivalentType(equivalent) { 2835 AttributedTypeBits.AttrKind = attrKind; 2836 } 2837 2838public: 2839 Kind getAttrKind() const { 2840 return static_cast<Kind>(AttributedTypeBits.AttrKind); 2841 } 2842 2843 QualType getModifiedType() const { return ModifiedType; } 2844 QualType getEquivalentType() const { return EquivalentType; } 2845 2846 bool isSugared() const { return true; } 2847 QualType desugar() const { return getEquivalentType(); } 2848 2849 void Profile(llvm::FoldingSetNodeID &ID) { 2850 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 2851 } 2852 2853 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 2854 QualType modified, QualType equivalent) { 2855 ID.AddInteger(attrKind); 2856 ID.AddPointer(modified.getAsOpaquePtr()); 2857 ID.AddPointer(equivalent.getAsOpaquePtr()); 2858 } 2859 2860 static bool classof(const Type *T) { 2861 return T->getTypeClass() == Attributed; 2862 } 2863 static bool classof(const AttributedType *T) { return true; } 2864}; 2865 2866class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2867 unsigned Depth : 15; 2868 unsigned ParameterPack : 1; 2869 unsigned Index : 16; 2870 IdentifierInfo *Name; 2871 2872 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2873 QualType Canon) 2874 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2875 /*VariablyModified=*/false, PP), 2876 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2877 2878 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2879 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2880 /*VariablyModified=*/false, PP), 2881 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2882 2883 friend class ASTContext; // ASTContext creates these 2884 2885public: 2886 unsigned getDepth() const { return Depth; } 2887 unsigned getIndex() const { return Index; } 2888 bool isParameterPack() const { return ParameterPack; } 2889 IdentifierInfo *getName() const { return Name; } 2890 2891 bool isSugared() const { return false; } 2892 QualType desugar() const { return QualType(this, 0); } 2893 2894 void Profile(llvm::FoldingSetNodeID &ID) { 2895 Profile(ID, Depth, Index, ParameterPack, Name); 2896 } 2897 2898 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2899 unsigned Index, bool ParameterPack, 2900 IdentifierInfo *Name) { 2901 ID.AddInteger(Depth); 2902 ID.AddInteger(Index); 2903 ID.AddBoolean(ParameterPack); 2904 ID.AddPointer(Name); 2905 } 2906 2907 static bool classof(const Type *T) { 2908 return T->getTypeClass() == TemplateTypeParm; 2909 } 2910 static bool classof(const TemplateTypeParmType *T) { return true; } 2911}; 2912 2913/// \brief Represents the result of substituting a type for a template 2914/// type parameter. 2915/// 2916/// Within an instantiated template, all template type parameters have 2917/// been replaced with these. They are used solely to record that a 2918/// type was originally written as a template type parameter; 2919/// therefore they are never canonical. 2920class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2921 // The original type parameter. 2922 const TemplateTypeParmType *Replaced; 2923 2924 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2925 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2926 Canon->isVariablyModifiedType(), 2927 Canon->containsUnexpandedParameterPack()), 2928 Replaced(Param) { } 2929 2930 friend class ASTContext; 2931 2932public: 2933 IdentifierInfo *getName() const { return Replaced->getName(); } 2934 2935 /// Gets the template parameter that was substituted for. 2936 const TemplateTypeParmType *getReplacedParameter() const { 2937 return Replaced; 2938 } 2939 2940 /// Gets the type that was substituted for the template 2941 /// parameter. 2942 QualType getReplacementType() const { 2943 return getCanonicalTypeInternal(); 2944 } 2945 2946 bool isSugared() const { return true; } 2947 QualType desugar() const { return getReplacementType(); } 2948 2949 void Profile(llvm::FoldingSetNodeID &ID) { 2950 Profile(ID, getReplacedParameter(), getReplacementType()); 2951 } 2952 static void Profile(llvm::FoldingSetNodeID &ID, 2953 const TemplateTypeParmType *Replaced, 2954 QualType Replacement) { 2955 ID.AddPointer(Replaced); 2956 ID.AddPointer(Replacement.getAsOpaquePtr()); 2957 } 2958 2959 static bool classof(const Type *T) { 2960 return T->getTypeClass() == SubstTemplateTypeParm; 2961 } 2962 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2963}; 2964 2965/// \brief Represents the result of substituting a set of types for a template 2966/// type parameter pack. 2967/// 2968/// When a pack expansion in the source code contains multiple parameter packs 2969/// and those parameter packs correspond to different levels of template 2970/// parameter lists, this type node is used to represent a template type 2971/// parameter pack from an outer level, which has already had its argument pack 2972/// substituted but that still lives within a pack expansion that itself 2973/// could not be instantiated. When actually performing a substitution into 2974/// that pack expansion (e.g., when all template parameters have corresponding 2975/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 2976/// at the current pack substitution index. 2977class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 2978 /// \brief The original type parameter. 2979 const TemplateTypeParmType *Replaced; 2980 2981 /// \brief A pointer to the set of template arguments that this 2982 /// parameter pack is instantiated with. 2983 const TemplateArgument *Arguments; 2984 2985 /// \brief The number of template arguments in \c Arguments. 2986 unsigned NumArguments; 2987 2988 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 2989 QualType Canon, 2990 const TemplateArgument &ArgPack); 2991 2992 friend class ASTContext; 2993 2994public: 2995 IdentifierInfo *getName() const { return Replaced->getName(); } 2996 2997 /// Gets the template parameter that was substituted for. 2998 const TemplateTypeParmType *getReplacedParameter() const { 2999 return Replaced; 3000 } 3001 3002 bool isSugared() const { return false; } 3003 QualType desugar() const { return QualType(this, 0); } 3004 3005 TemplateArgument getArgumentPack() const; 3006 3007 void Profile(llvm::FoldingSetNodeID &ID); 3008 static void Profile(llvm::FoldingSetNodeID &ID, 3009 const TemplateTypeParmType *Replaced, 3010 const TemplateArgument &ArgPack); 3011 3012 static bool classof(const Type *T) { 3013 return T->getTypeClass() == SubstTemplateTypeParmPack; 3014 } 3015 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3016}; 3017 3018/// \brief Represents a C++0x auto type. 3019/// 3020/// These types are usually a placeholder for a deduced type. However, within 3021/// templates and before the initializer is attached, there is no deduced type 3022/// and an auto type is type-dependent and canonical. 3023class AutoType : public Type, public llvm::FoldingSetNode { 3024 AutoType(QualType DeducedType) 3025 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3026 /*Dependent=*/DeducedType.isNull(), 3027 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3028 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3029 "deduced a dependent type for auto"); 3030 } 3031 3032 friend class ASTContext; // ASTContext creates these 3033 3034public: 3035 bool isSugared() const { return isDeduced(); } 3036 QualType desugar() const { return getCanonicalTypeInternal(); } 3037 3038 QualType getDeducedType() const { 3039 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3040 } 3041 bool isDeduced() const { 3042 return !isDependentType(); 3043 } 3044 3045 void Profile(llvm::FoldingSetNodeID &ID) { 3046 Profile(ID, getDeducedType()); 3047 } 3048 3049 static void Profile(llvm::FoldingSetNodeID &ID, 3050 QualType Deduced) { 3051 ID.AddPointer(Deduced.getAsOpaquePtr()); 3052 } 3053 3054 static bool classof(const Type *T) { 3055 return T->getTypeClass() == Auto; 3056 } 3057 static bool classof(const AutoType *T) { return true; } 3058}; 3059 3060/// \brief Represents the type of a template specialization as written 3061/// in the source code. 3062/// 3063/// Template specialization types represent the syntactic form of a 3064/// template-id that refers to a type, e.g., @c vector<int>. Some 3065/// template specialization types are syntactic sugar, whose canonical 3066/// type will point to some other type node that represents the 3067/// instantiation or class template specialization. For example, a 3068/// class template specialization type of @c vector<int> will refer to 3069/// a tag type for the instantiation 3070/// @c std::vector<int, std::allocator<int>>. 3071/// 3072/// Other template specialization types, for which the template name 3073/// is dependent, may be canonical types. These types are always 3074/// dependent. 3075class TemplateSpecializationType 3076 : public Type, public llvm::FoldingSetNode { 3077 /// \brief The name of the template being specialized. 3078 TemplateName Template; 3079 3080 /// \brief - The number of template arguments named in this class 3081 /// template specialization. 3082 unsigned NumArgs; 3083 3084 TemplateSpecializationType(TemplateName T, 3085 const TemplateArgument *Args, 3086 unsigned NumArgs, QualType Canon); 3087 3088 friend class ASTContext; // ASTContext creates these 3089 3090public: 3091 /// \brief Determine whether any of the given template arguments are 3092 /// dependent. 3093 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3094 unsigned NumArgs); 3095 3096 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3097 unsigned NumArgs); 3098 3099 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 3100 3101 /// \brief Print a template argument list, including the '<' and '>' 3102 /// enclosing the template arguments. 3103 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3104 unsigned NumArgs, 3105 const PrintingPolicy &Policy, 3106 bool SkipBrackets = false); 3107 3108 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3109 unsigned NumArgs, 3110 const PrintingPolicy &Policy); 3111 3112 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3113 const PrintingPolicy &Policy); 3114 3115 /// True if this template specialization type matches a current 3116 /// instantiation in the context in which it is found. 3117 bool isCurrentInstantiation() const { 3118 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3119 } 3120 3121 typedef const TemplateArgument * iterator; 3122 3123 iterator begin() const { return getArgs(); } 3124 iterator end() const; // defined inline in TemplateBase.h 3125 3126 /// \brief Retrieve the name of the template that we are specializing. 3127 TemplateName getTemplateName() const { return Template; } 3128 3129 /// \brief Retrieve the template arguments. 3130 const TemplateArgument *getArgs() const { 3131 return reinterpret_cast<const TemplateArgument *>(this + 1); 3132 } 3133 3134 /// \brief Retrieve the number of template arguments. 3135 unsigned getNumArgs() const { return NumArgs; } 3136 3137 /// \brief Retrieve a specific template argument as a type. 3138 /// \precondition @c isArgType(Arg) 3139 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3140 3141 bool isSugared() const { 3142 return !isDependentType() || isCurrentInstantiation(); 3143 } 3144 QualType desugar() const { return getCanonicalTypeInternal(); } 3145 3146 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3147 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3148 } 3149 3150 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3151 const TemplateArgument *Args, 3152 unsigned NumArgs, 3153 const ASTContext &Context); 3154 3155 static bool classof(const Type *T) { 3156 return T->getTypeClass() == TemplateSpecialization; 3157 } 3158 static bool classof(const TemplateSpecializationType *T) { return true; } 3159}; 3160 3161/// \brief The injected class name of a C++ class template or class 3162/// template partial specialization. Used to record that a type was 3163/// spelled with a bare identifier rather than as a template-id; the 3164/// equivalent for non-templated classes is just RecordType. 3165/// 3166/// Injected class name types are always dependent. Template 3167/// instantiation turns these into RecordTypes. 3168/// 3169/// Injected class name types are always canonical. This works 3170/// because it is impossible to compare an injected class name type 3171/// with the corresponding non-injected template type, for the same 3172/// reason that it is impossible to directly compare template 3173/// parameters from different dependent contexts: injected class name 3174/// types can only occur within the scope of a particular templated 3175/// declaration, and within that scope every template specialization 3176/// will canonicalize to the injected class name (when appropriate 3177/// according to the rules of the language). 3178class InjectedClassNameType : public Type { 3179 CXXRecordDecl *Decl; 3180 3181 /// The template specialization which this type represents. 3182 /// For example, in 3183 /// template <class T> class A { ... }; 3184 /// this is A<T>, whereas in 3185 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3186 /// this is A<B<X,Y> >. 3187 /// 3188 /// It is always unqualified, always a template specialization type, 3189 /// and always dependent. 3190 QualType InjectedType; 3191 3192 friend class ASTContext; // ASTContext creates these. 3193 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3194 // currently suitable for AST reading, too much 3195 // interdependencies. 3196 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3197 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3198 /*VariablyModified=*/false, 3199 /*ContainsUnexpandedParameterPack=*/false), 3200 Decl(D), InjectedType(TST) { 3201 assert(isa<TemplateSpecializationType>(TST)); 3202 assert(!TST.hasQualifiers()); 3203 assert(TST->isDependentType()); 3204 } 3205 3206public: 3207 QualType getInjectedSpecializationType() const { return InjectedType; } 3208 const TemplateSpecializationType *getInjectedTST() const { 3209 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3210 } 3211 3212 CXXRecordDecl *getDecl() const; 3213 3214 bool isSugared() const { return false; } 3215 QualType desugar() const { return QualType(this, 0); } 3216 3217 static bool classof(const Type *T) { 3218 return T->getTypeClass() == InjectedClassName; 3219 } 3220 static bool classof(const InjectedClassNameType *T) { return true; } 3221}; 3222 3223/// \brief The kind of a tag type. 3224enum TagTypeKind { 3225 /// \brief The "struct" keyword. 3226 TTK_Struct, 3227 /// \brief The "union" keyword. 3228 TTK_Union, 3229 /// \brief The "class" keyword. 3230 TTK_Class, 3231 /// \brief The "enum" keyword. 3232 TTK_Enum 3233}; 3234 3235/// \brief The elaboration keyword that precedes a qualified type name or 3236/// introduces an elaborated-type-specifier. 3237enum ElaboratedTypeKeyword { 3238 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3239 ETK_Struct, 3240 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3241 ETK_Union, 3242 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3243 ETK_Class, 3244 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3245 ETK_Enum, 3246 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3247 /// \c typename T::type. 3248 ETK_Typename, 3249 /// \brief No keyword precedes the qualified type name. 3250 ETK_None 3251}; 3252 3253/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3254/// The keyword in stored in the free bits of the base class. 3255/// Also provides a few static helpers for converting and printing 3256/// elaborated type keyword and tag type kind enumerations. 3257class TypeWithKeyword : public Type { 3258protected: 3259 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3260 QualType Canonical, bool Dependent, bool VariablyModified, 3261 bool ContainsUnexpandedParameterPack) 3262 : Type(tc, Canonical, Dependent, VariablyModified, 3263 ContainsUnexpandedParameterPack) { 3264 TypeWithKeywordBits.Keyword = Keyword; 3265 } 3266 3267public: 3268 ElaboratedTypeKeyword getKeyword() const { 3269 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3270 } 3271 3272 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3273 /// into an elaborated type keyword. 3274 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3275 3276 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3277 /// into a tag type kind. It is an error to provide a type specifier 3278 /// which *isn't* a tag kind here. 3279 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3280 3281 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3282 /// elaborated type keyword. 3283 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3284 3285 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3286 // a TagTypeKind. It is an error to provide an elaborated type keyword 3287 /// which *isn't* a tag kind here. 3288 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3289 3290 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3291 3292 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3293 3294 static const char *getTagTypeKindName(TagTypeKind Kind) { 3295 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3296 } 3297 3298 class CannotCastToThisType {}; 3299 static CannotCastToThisType classof(const Type *); 3300}; 3301 3302/// \brief Represents a type that was referred to using an elaborated type 3303/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3304/// or both. 3305/// 3306/// This type is used to keep track of a type name as written in the 3307/// source code, including tag keywords and any nested-name-specifiers. 3308/// The type itself is always "sugar", used to express what was written 3309/// in the source code but containing no additional semantic information. 3310class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3311 3312 /// \brief The nested name specifier containing the qualifier. 3313 NestedNameSpecifier *NNS; 3314 3315 /// \brief The type that this qualified name refers to. 3316 QualType NamedType; 3317 3318 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3319 QualType NamedType, QualType CanonType) 3320 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3321 NamedType->isDependentType(), 3322 NamedType->isVariablyModifiedType(), 3323 NamedType->containsUnexpandedParameterPack()), 3324 NNS(NNS), NamedType(NamedType) { 3325 assert(!(Keyword == ETK_None && NNS == 0) && 3326 "ElaboratedType cannot have elaborated type keyword " 3327 "and name qualifier both null."); 3328 } 3329 3330 friend class ASTContext; // ASTContext creates these 3331 3332public: 3333 ~ElaboratedType(); 3334 3335 /// \brief Retrieve the qualification on this type. 3336 NestedNameSpecifier *getQualifier() const { return NNS; } 3337 3338 /// \brief Retrieve the type named by the qualified-id. 3339 QualType getNamedType() const { return NamedType; } 3340 3341 /// \brief Remove a single level of sugar. 3342 QualType desugar() const { return getNamedType(); } 3343 3344 /// \brief Returns whether this type directly provides sugar. 3345 bool isSugared() const { return true; } 3346 3347 void Profile(llvm::FoldingSetNodeID &ID) { 3348 Profile(ID, getKeyword(), NNS, NamedType); 3349 } 3350 3351 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3352 NestedNameSpecifier *NNS, QualType NamedType) { 3353 ID.AddInteger(Keyword); 3354 ID.AddPointer(NNS); 3355 NamedType.Profile(ID); 3356 } 3357 3358 static bool classof(const Type *T) { 3359 return T->getTypeClass() == Elaborated; 3360 } 3361 static bool classof(const ElaboratedType *T) { return true; } 3362}; 3363 3364/// \brief Represents a qualified type name for which the type name is 3365/// dependent. 3366/// 3367/// DependentNameType represents a class of dependent types that involve a 3368/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3369/// name of a type. The DependentNameType may start with a "typename" (for a 3370/// typename-specifier), "class", "struct", "union", or "enum" (for a 3371/// dependent elaborated-type-specifier), or nothing (in contexts where we 3372/// know that we must be referring to a type, e.g., in a base class specifier). 3373class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3374 3375 /// \brief The nested name specifier containing the qualifier. 3376 NestedNameSpecifier *NNS; 3377 3378 /// \brief The type that this typename specifier refers to. 3379 const IdentifierInfo *Name; 3380 3381 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3382 const IdentifierInfo *Name, QualType CanonType) 3383 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3384 /*VariablyModified=*/false, 3385 NNS->containsUnexpandedParameterPack()), 3386 NNS(NNS), Name(Name) { 3387 assert(NNS->isDependent() && 3388 "DependentNameType requires a dependent nested-name-specifier"); 3389 } 3390 3391 friend class ASTContext; // ASTContext creates these 3392 3393public: 3394 /// \brief Retrieve the qualification on this type. 3395 NestedNameSpecifier *getQualifier() const { return NNS; } 3396 3397 /// \brief Retrieve the type named by the typename specifier as an 3398 /// identifier. 3399 /// 3400 /// This routine will return a non-NULL identifier pointer when the 3401 /// form of the original typename was terminated by an identifier, 3402 /// e.g., "typename T::type". 3403 const IdentifierInfo *getIdentifier() const { 3404 return Name; 3405 } 3406 3407 bool isSugared() const { return false; } 3408 QualType desugar() const { return QualType(this, 0); } 3409 3410 void Profile(llvm::FoldingSetNodeID &ID) { 3411 Profile(ID, getKeyword(), NNS, Name); 3412 } 3413 3414 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3415 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3416 ID.AddInteger(Keyword); 3417 ID.AddPointer(NNS); 3418 ID.AddPointer(Name); 3419 } 3420 3421 static bool classof(const Type *T) { 3422 return T->getTypeClass() == DependentName; 3423 } 3424 static bool classof(const DependentNameType *T) { return true; } 3425}; 3426 3427/// DependentTemplateSpecializationType - Represents a template 3428/// specialization type whose template cannot be resolved, e.g. 3429/// A<T>::template B<T> 3430class DependentTemplateSpecializationType : 3431 public TypeWithKeyword, public llvm::FoldingSetNode { 3432 3433 /// \brief The nested name specifier containing the qualifier. 3434 NestedNameSpecifier *NNS; 3435 3436 /// \brief The identifier of the template. 3437 const IdentifierInfo *Name; 3438 3439 /// \brief - The number of template arguments named in this class 3440 /// template specialization. 3441 unsigned NumArgs; 3442 3443 const TemplateArgument *getArgBuffer() const { 3444 return reinterpret_cast<const TemplateArgument*>(this+1); 3445 } 3446 TemplateArgument *getArgBuffer() { 3447 return reinterpret_cast<TemplateArgument*>(this+1); 3448 } 3449 3450 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3451 NestedNameSpecifier *NNS, 3452 const IdentifierInfo *Name, 3453 unsigned NumArgs, 3454 const TemplateArgument *Args, 3455 QualType Canon); 3456 3457 friend class ASTContext; // ASTContext creates these 3458 3459public: 3460 NestedNameSpecifier *getQualifier() const { return NNS; } 3461 const IdentifierInfo *getIdentifier() const { return Name; } 3462 3463 /// \brief Retrieve the template arguments. 3464 const TemplateArgument *getArgs() const { 3465 return getArgBuffer(); 3466 } 3467 3468 /// \brief Retrieve the number of template arguments. 3469 unsigned getNumArgs() const { return NumArgs; } 3470 3471 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3472 3473 typedef const TemplateArgument * iterator; 3474 iterator begin() const { return getArgs(); } 3475 iterator end() const; // inline in TemplateBase.h 3476 3477 bool isSugared() const { return false; } 3478 QualType desugar() const { return QualType(this, 0); } 3479 3480 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3481 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3482 } 3483 3484 static void Profile(llvm::FoldingSetNodeID &ID, 3485 const ASTContext &Context, 3486 ElaboratedTypeKeyword Keyword, 3487 NestedNameSpecifier *Qualifier, 3488 const IdentifierInfo *Name, 3489 unsigned NumArgs, 3490 const TemplateArgument *Args); 3491 3492 static bool classof(const Type *T) { 3493 return T->getTypeClass() == DependentTemplateSpecialization; 3494 } 3495 static bool classof(const DependentTemplateSpecializationType *T) { 3496 return true; 3497 } 3498}; 3499 3500/// \brief Represents a pack expansion of types. 3501/// 3502/// Pack expansions are part of C++0x variadic templates. A pack 3503/// expansion contains a pattern, which itself contains one or more 3504/// "unexpanded" parameter packs. When instantiated, a pack expansion 3505/// produces a series of types, each instantiated from the pattern of 3506/// the expansion, where the Ith instantiation of the pattern uses the 3507/// Ith arguments bound to each of the unexpanded parameter packs. The 3508/// pack expansion is considered to "expand" these unexpanded 3509/// parameter packs. 3510/// 3511/// \code 3512/// template<typename ...Types> struct tuple; 3513/// 3514/// template<typename ...Types> 3515/// struct tuple_of_references { 3516/// typedef tuple<Types&...> type; 3517/// }; 3518/// \endcode 3519/// 3520/// Here, the pack expansion \c Types&... is represented via a 3521/// PackExpansionType whose pattern is Types&. 3522class PackExpansionType : public Type, public llvm::FoldingSetNode { 3523 /// \brief The pattern of the pack expansion. 3524 QualType Pattern; 3525 3526 /// \brief The number of expansions that this pack expansion will 3527 /// generate when substituted (+1), or indicates that 3528 /// 3529 /// This field will only have a non-zero value when some of the parameter 3530 /// packs that occur within the pattern have been substituted but others have 3531 /// not. 3532 unsigned NumExpansions; 3533 3534 PackExpansionType(QualType Pattern, QualType Canon, 3535 llvm::Optional<unsigned> NumExpansions) 3536 : Type(PackExpansion, Canon, /*Dependent=*/true, 3537 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3538 /*ContainsUnexpandedParameterPack=*/false), 3539 Pattern(Pattern), 3540 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3541 3542 friend class ASTContext; // ASTContext creates these 3543 3544public: 3545 /// \brief Retrieve the pattern of this pack expansion, which is the 3546 /// type that will be repeatedly instantiated when instantiating the 3547 /// pack expansion itself. 3548 QualType getPattern() const { return Pattern; } 3549 3550 /// \brief Retrieve the number of expansions that this pack expansion will 3551 /// generate, if known. 3552 llvm::Optional<unsigned> getNumExpansions() const { 3553 if (NumExpansions) 3554 return NumExpansions - 1; 3555 3556 return llvm::Optional<unsigned>(); 3557 } 3558 3559 bool isSugared() const { return false; } 3560 QualType desugar() const { return QualType(this, 0); } 3561 3562 void Profile(llvm::FoldingSetNodeID &ID) { 3563 Profile(ID, getPattern(), getNumExpansions()); 3564 } 3565 3566 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3567 llvm::Optional<unsigned> NumExpansions) { 3568 ID.AddPointer(Pattern.getAsOpaquePtr()); 3569 ID.AddBoolean(NumExpansions); 3570 if (NumExpansions) 3571 ID.AddInteger(*NumExpansions); 3572 } 3573 3574 static bool classof(const Type *T) { 3575 return T->getTypeClass() == PackExpansion; 3576 } 3577 static bool classof(const PackExpansionType *T) { 3578 return true; 3579 } 3580}; 3581 3582/// ObjCObjectType - Represents a class type in Objective C. 3583/// Every Objective C type is a combination of a base type and a 3584/// list of protocols. 3585/// 3586/// Given the following declarations: 3587/// @class C; 3588/// @protocol P; 3589/// 3590/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3591/// with base C and no protocols. 3592/// 3593/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3594/// 3595/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3596/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3597/// and no protocols. 3598/// 3599/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3600/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3601/// this should get its own sugar class to better represent the source. 3602class ObjCObjectType : public Type { 3603 // ObjCObjectType.NumProtocols - the number of protocols stored 3604 // after the ObjCObjectPointerType node. 3605 // 3606 // These protocols are those written directly on the type. If 3607 // protocol qualifiers ever become additive, the iterators will need 3608 // to get kindof complicated. 3609 // 3610 // In the canonical object type, these are sorted alphabetically 3611 // and uniqued. 3612 3613 /// Either a BuiltinType or an InterfaceType or sugar for either. 3614 QualType BaseType; 3615 3616 ObjCProtocolDecl * const *getProtocolStorage() const { 3617 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3618 } 3619 3620 ObjCProtocolDecl **getProtocolStorage(); 3621 3622protected: 3623 ObjCObjectType(QualType Canonical, QualType Base, 3624 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3625 3626 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3627 ObjCObjectType(enum Nonce_ObjCInterface) 3628 : Type(ObjCInterface, QualType(), false, false, false), 3629 BaseType(QualType(this_(), 0)) { 3630 ObjCObjectTypeBits.NumProtocols = 0; 3631 } 3632 3633public: 3634 /// getBaseType - Gets the base type of this object type. This is 3635 /// always (possibly sugar for) one of: 3636 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3637 /// user, which is a typedef for an ObjCPointerType) 3638 /// - the 'Class' builtin type (same caveat) 3639 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3640 QualType getBaseType() const { return BaseType; } 3641 3642 bool isObjCId() const { 3643 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3644 } 3645 bool isObjCClass() const { 3646 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3647 } 3648 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3649 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3650 bool isObjCUnqualifiedIdOrClass() const { 3651 if (!qual_empty()) return false; 3652 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3653 return T->getKind() == BuiltinType::ObjCId || 3654 T->getKind() == BuiltinType::ObjCClass; 3655 return false; 3656 } 3657 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3658 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3659 3660 /// Gets the interface declaration for this object type, if the base type 3661 /// really is an interface. 3662 ObjCInterfaceDecl *getInterface() const; 3663 3664 typedef ObjCProtocolDecl * const *qual_iterator; 3665 3666 qual_iterator qual_begin() const { return getProtocolStorage(); } 3667 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3668 3669 bool qual_empty() const { return getNumProtocols() == 0; } 3670 3671 /// getNumProtocols - Return the number of qualifying protocols in this 3672 /// interface type, or 0 if there are none. 3673 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3674 3675 /// \brief Fetch a protocol by index. 3676 ObjCProtocolDecl *getProtocol(unsigned I) const { 3677 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3678 return qual_begin()[I]; 3679 } 3680 3681 bool isSugared() const { return false; } 3682 QualType desugar() const { return QualType(this, 0); } 3683 3684 static bool classof(const Type *T) { 3685 return T->getTypeClass() == ObjCObject || 3686 T->getTypeClass() == ObjCInterface; 3687 } 3688 static bool classof(const ObjCObjectType *) { return true; } 3689}; 3690 3691/// ObjCObjectTypeImpl - A class providing a concrete implementation 3692/// of ObjCObjectType, so as to not increase the footprint of 3693/// ObjCInterfaceType. Code outside of ASTContext and the core type 3694/// system should not reference this type. 3695class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3696 friend class ASTContext; 3697 3698 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3699 // will need to be modified. 3700 3701 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3702 ObjCProtocolDecl * const *Protocols, 3703 unsigned NumProtocols) 3704 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3705 3706public: 3707 void Profile(llvm::FoldingSetNodeID &ID); 3708 static void Profile(llvm::FoldingSetNodeID &ID, 3709 QualType Base, 3710 ObjCProtocolDecl *const *protocols, 3711 unsigned NumProtocols); 3712}; 3713 3714inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3715 return reinterpret_cast<ObjCProtocolDecl**>( 3716 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3717} 3718 3719/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3720/// object oriented design. They basically correspond to C++ classes. There 3721/// are two kinds of interface types, normal interfaces like "NSString" and 3722/// qualified interfaces, which are qualified with a protocol list like 3723/// "NSString<NSCopyable, NSAmazing>". 3724/// 3725/// ObjCInterfaceType guarantees the following properties when considered 3726/// as a subtype of its superclass, ObjCObjectType: 3727/// - There are no protocol qualifiers. To reinforce this, code which 3728/// tries to invoke the protocol methods via an ObjCInterfaceType will 3729/// fail to compile. 3730/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3731/// T->getBaseType() == QualType(T, 0). 3732class ObjCInterfaceType : public ObjCObjectType { 3733 ObjCInterfaceDecl *Decl; 3734 3735 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3736 : ObjCObjectType(Nonce_ObjCInterface), 3737 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3738 friend class ASTContext; // ASTContext creates these. 3739 3740public: 3741 /// getDecl - Get the declaration of this interface. 3742 ObjCInterfaceDecl *getDecl() const { return Decl; } 3743 3744 bool isSugared() const { return false; } 3745 QualType desugar() const { return QualType(this, 0); } 3746 3747 static bool classof(const Type *T) { 3748 return T->getTypeClass() == ObjCInterface; 3749 } 3750 static bool classof(const ObjCInterfaceType *) { return true; } 3751 3752 // Nonsense to "hide" certain members of ObjCObjectType within this 3753 // class. People asking for protocols on an ObjCInterfaceType are 3754 // not going to get what they want: ObjCInterfaceTypes are 3755 // guaranteed to have no protocols. 3756 enum { 3757 qual_iterator, 3758 qual_begin, 3759 qual_end, 3760 getNumProtocols, 3761 getProtocol 3762 }; 3763}; 3764 3765inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3766 if (const ObjCInterfaceType *T = 3767 getBaseType()->getAs<ObjCInterfaceType>()) 3768 return T->getDecl(); 3769 return 0; 3770} 3771 3772/// ObjCObjectPointerType - Used to represent a pointer to an 3773/// Objective C object. These are constructed from pointer 3774/// declarators when the pointee type is an ObjCObjectType (or sugar 3775/// for one). In addition, the 'id' and 'Class' types are typedefs 3776/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3777/// are translated into these. 3778/// 3779/// Pointers to pointers to Objective C objects are still PointerTypes; 3780/// only the first level of pointer gets it own type implementation. 3781class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3782 QualType PointeeType; 3783 3784 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3785 : Type(ObjCObjectPointer, Canonical, false, false, false), 3786 PointeeType(Pointee) {} 3787 friend class ASTContext; // ASTContext creates these. 3788 3789public: 3790 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3791 /// The result will always be an ObjCObjectType or sugar thereof. 3792 QualType getPointeeType() const { return PointeeType; } 3793 3794 /// getObjCObjectType - Gets the type pointed to by this ObjC 3795 /// pointer. This method always returns non-null. 3796 /// 3797 /// This method is equivalent to getPointeeType() except that 3798 /// it discards any typedefs (or other sugar) between this 3799 /// type and the "outermost" object type. So for: 3800 /// @class A; @protocol P; @protocol Q; 3801 /// typedef A<P> AP; 3802 /// typedef A A1; 3803 /// typedef A1<P> A1P; 3804 /// typedef A1P<Q> A1PQ; 3805 /// For 'A*', getObjectType() will return 'A'. 3806 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3807 /// For 'AP*', getObjectType() will return 'A<P>'. 3808 /// For 'A1*', getObjectType() will return 'A'. 3809 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3810 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3811 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3812 /// adding protocols to a protocol-qualified base discards the 3813 /// old qualifiers (for now). But if it didn't, getObjectType() 3814 /// would return 'A1P<Q>' (and we'd have to make iterating over 3815 /// qualifiers more complicated). 3816 const ObjCObjectType *getObjectType() const { 3817 return PointeeType->castAs<ObjCObjectType>(); 3818 } 3819 3820 /// getInterfaceType - If this pointer points to an Objective C 3821 /// @interface type, gets the type for that interface. Any protocol 3822 /// qualifiers on the interface are ignored. 3823 /// 3824 /// \return null if the base type for this pointer is 'id' or 'Class' 3825 const ObjCInterfaceType *getInterfaceType() const { 3826 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3827 } 3828 3829 /// getInterfaceDecl - If this pointer points to an Objective @interface 3830 /// type, gets the declaration for that interface. 3831 /// 3832 /// \return null if the base type for this pointer is 'id' or 'Class' 3833 ObjCInterfaceDecl *getInterfaceDecl() const { 3834 return getObjectType()->getInterface(); 3835 } 3836 3837 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3838 /// its object type is the primitive 'id' type with no protocols. 3839 bool isObjCIdType() const { 3840 return getObjectType()->isObjCUnqualifiedId(); 3841 } 3842 3843 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3844 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3845 bool isObjCClassType() const { 3846 return getObjectType()->isObjCUnqualifiedClass(); 3847 } 3848 3849 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3850 /// non-empty set of protocols. 3851 bool isObjCQualifiedIdType() const { 3852 return getObjectType()->isObjCQualifiedId(); 3853 } 3854 3855 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3856 /// some non-empty set of protocols. 3857 bool isObjCQualifiedClassType() const { 3858 return getObjectType()->isObjCQualifiedClass(); 3859 } 3860 3861 /// An iterator over the qualifiers on the object type. Provided 3862 /// for convenience. This will always iterate over the full set of 3863 /// protocols on a type, not just those provided directly. 3864 typedef ObjCObjectType::qual_iterator qual_iterator; 3865 3866 qual_iterator qual_begin() const { 3867 return getObjectType()->qual_begin(); 3868 } 3869 qual_iterator qual_end() const { 3870 return getObjectType()->qual_end(); 3871 } 3872 bool qual_empty() const { return getObjectType()->qual_empty(); } 3873 3874 /// getNumProtocols - Return the number of qualifying protocols on 3875 /// the object type. 3876 unsigned getNumProtocols() const { 3877 return getObjectType()->getNumProtocols(); 3878 } 3879 3880 /// \brief Retrieve a qualifying protocol by index on the object 3881 /// type. 3882 ObjCProtocolDecl *getProtocol(unsigned I) const { 3883 return getObjectType()->getProtocol(I); 3884 } 3885 3886 bool isSugared() const { return false; } 3887 QualType desugar() const { return QualType(this, 0); } 3888 3889 void Profile(llvm::FoldingSetNodeID &ID) { 3890 Profile(ID, getPointeeType()); 3891 } 3892 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3893 ID.AddPointer(T.getAsOpaquePtr()); 3894 } 3895 static bool classof(const Type *T) { 3896 return T->getTypeClass() == ObjCObjectPointer; 3897 } 3898 static bool classof(const ObjCObjectPointerType *) { return true; } 3899}; 3900 3901/// A qualifier set is used to build a set of qualifiers. 3902class QualifierCollector : public Qualifiers { 3903public: 3904 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3905 3906 /// Collect any qualifiers on the given type and return an 3907 /// unqualified type. The qualifiers are assumed to be consistent 3908 /// with those already in the type. 3909 const Type *strip(QualType type) { 3910 addFastQualifiers(type.getLocalFastQualifiers()); 3911 if (!type.hasLocalNonFastQualifiers()) 3912 return type.getTypePtrUnsafe(); 3913 3914 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 3915 addConsistentQualifiers(extQuals->getQualifiers()); 3916 return extQuals->getBaseType(); 3917 } 3918 3919 /// Apply the collected qualifiers to the given type. 3920 QualType apply(const ASTContext &Context, QualType QT) const; 3921 3922 /// Apply the collected qualifiers to the given type. 3923 QualType apply(const ASTContext &Context, const Type* T) const; 3924}; 3925 3926 3927// Inline function definitions. 3928 3929inline const Type *QualType::getTypePtr() const { 3930 return getCommonPtr()->BaseType; 3931} 3932 3933inline const Type *QualType::getTypePtrOrNull() const { 3934 return (isNull() ? 0 : getCommonPtr()->BaseType); 3935} 3936 3937inline SplitQualType QualType::split() const { 3938 if (!hasLocalNonFastQualifiers()) 3939 return SplitQualType(getTypePtrUnsafe(), 3940 Qualifiers::fromFastMask(getLocalFastQualifiers())); 3941 3942 const ExtQuals *eq = getExtQualsUnsafe(); 3943 Qualifiers qs = eq->getQualifiers(); 3944 qs.addFastQualifiers(getLocalFastQualifiers()); 3945 return SplitQualType(eq->getBaseType(), qs); 3946} 3947 3948inline Qualifiers QualType::getLocalQualifiers() const { 3949 Qualifiers Quals; 3950 if (hasLocalNonFastQualifiers()) 3951 Quals = getExtQualsUnsafe()->getQualifiers(); 3952 Quals.addFastQualifiers(getLocalFastQualifiers()); 3953 return Quals; 3954} 3955 3956inline Qualifiers QualType::getQualifiers() const { 3957 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 3958 quals.addFastQualifiers(getLocalFastQualifiers()); 3959 return quals; 3960} 3961 3962inline unsigned QualType::getCVRQualifiers() const { 3963 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 3964 cvr |= getLocalCVRQualifiers(); 3965 return cvr; 3966} 3967 3968inline QualType QualType::getCanonicalType() const { 3969 QualType canon = getCommonPtr()->CanonicalType; 3970 return canon.withFastQualifiers(getLocalFastQualifiers()); 3971} 3972 3973inline bool QualType::isCanonical() const { 3974 return getTypePtr()->isCanonicalUnqualified(); 3975} 3976 3977inline bool QualType::isCanonicalAsParam() const { 3978 if (!isCanonical()) return false; 3979 if (hasLocalQualifiers()) return false; 3980 3981 const Type *T = getTypePtr(); 3982 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 3983 return false; 3984 3985 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 3986} 3987 3988inline bool QualType::isConstQualified() const { 3989 return isLocalConstQualified() || 3990 getCommonPtr()->CanonicalType.isLocalConstQualified(); 3991} 3992 3993inline bool QualType::isRestrictQualified() const { 3994 return isLocalRestrictQualified() || 3995 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 3996} 3997 3998 3999inline bool QualType::isVolatileQualified() const { 4000 return isLocalVolatileQualified() || 4001 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4002} 4003 4004inline bool QualType::hasQualifiers() const { 4005 return hasLocalQualifiers() || 4006 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4007} 4008 4009inline QualType QualType::getUnqualifiedType() const { 4010 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4011 return QualType(getTypePtr(), 0); 4012 4013 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4014} 4015 4016inline SplitQualType QualType::getSplitUnqualifiedType() const { 4017 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4018 return split(); 4019 4020 return getSplitUnqualifiedTypeImpl(*this); 4021} 4022 4023inline void QualType::removeLocalConst() { 4024 removeLocalFastQualifiers(Qualifiers::Const); 4025} 4026 4027inline void QualType::removeLocalRestrict() { 4028 removeLocalFastQualifiers(Qualifiers::Restrict); 4029} 4030 4031inline void QualType::removeLocalVolatile() { 4032 removeLocalFastQualifiers(Qualifiers::Volatile); 4033} 4034 4035inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4036 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4037 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4038 4039 // Fast path: we don't need to touch the slow qualifiers. 4040 removeLocalFastQualifiers(Mask); 4041} 4042 4043/// getAddressSpace - Return the address space of this type. 4044inline unsigned QualType::getAddressSpace() const { 4045 return getQualifiers().getAddressSpace(); 4046} 4047 4048/// getObjCGCAttr - Return the gc attribute of this type. 4049inline Qualifiers::GC QualType::getObjCGCAttr() const { 4050 return getQualifiers().getObjCGCAttr(); 4051} 4052 4053inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4054 if (const PointerType *PT = t.getAs<PointerType>()) { 4055 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4056 return FT->getExtInfo(); 4057 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4058 return FT->getExtInfo(); 4059 4060 return FunctionType::ExtInfo(); 4061} 4062 4063inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4064 return getFunctionExtInfo(*t); 4065} 4066 4067/// \brief Determine whether this set of qualifiers is a superset of the given 4068/// set of qualifiers. 4069inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 4070 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 4071} 4072 4073/// isMoreQualifiedThan - Determine whether this type is more 4074/// qualified than the Other type. For example, "const volatile int" 4075/// is more qualified than "const int", "volatile int", and 4076/// "int". However, it is not more qualified than "const volatile 4077/// int". 4078inline bool QualType::isMoreQualifiedThan(QualType other) const { 4079 Qualifiers myQuals = getQualifiers(); 4080 Qualifiers otherQuals = other.getQualifiers(); 4081 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4082} 4083 4084/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4085/// as qualified as the Other type. For example, "const volatile 4086/// int" is at least as qualified as "const int", "volatile int", 4087/// "int", and "const volatile int". 4088inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4089 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4090} 4091 4092/// getNonReferenceType - If Type is a reference type (e.g., const 4093/// int&), returns the type that the reference refers to ("const 4094/// int"). Otherwise, returns the type itself. This routine is used 4095/// throughout Sema to implement C++ 5p6: 4096/// 4097/// If an expression initially has the type "reference to T" (8.3.2, 4098/// 8.5.3), the type is adjusted to "T" prior to any further 4099/// analysis, the expression designates the object or function 4100/// denoted by the reference, and the expression is an lvalue. 4101inline QualType QualType::getNonReferenceType() const { 4102 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4103 return RefType->getPointeeType(); 4104 else 4105 return *this; 4106} 4107 4108inline bool Type::isFunctionType() const { 4109 return isa<FunctionType>(CanonicalType); 4110} 4111inline bool Type::isPointerType() const { 4112 return isa<PointerType>(CanonicalType); 4113} 4114inline bool Type::isAnyPointerType() const { 4115 return isPointerType() || isObjCObjectPointerType(); 4116} 4117inline bool Type::isBlockPointerType() const { 4118 return isa<BlockPointerType>(CanonicalType); 4119} 4120inline bool Type::isReferenceType() const { 4121 return isa<ReferenceType>(CanonicalType); 4122} 4123inline bool Type::isLValueReferenceType() const { 4124 return isa<LValueReferenceType>(CanonicalType); 4125} 4126inline bool Type::isRValueReferenceType() const { 4127 return isa<RValueReferenceType>(CanonicalType); 4128} 4129inline bool Type::isFunctionPointerType() const { 4130 if (const PointerType *T = getAs<PointerType>()) 4131 return T->getPointeeType()->isFunctionType(); 4132 else 4133 return false; 4134} 4135inline bool Type::isMemberPointerType() const { 4136 return isa<MemberPointerType>(CanonicalType); 4137} 4138inline bool Type::isMemberFunctionPointerType() const { 4139 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4140 return T->isMemberFunctionPointer(); 4141 else 4142 return false; 4143} 4144inline bool Type::isMemberDataPointerType() const { 4145 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4146 return T->isMemberDataPointer(); 4147 else 4148 return false; 4149} 4150inline bool Type::isArrayType() const { 4151 return isa<ArrayType>(CanonicalType); 4152} 4153inline bool Type::isConstantArrayType() const { 4154 return isa<ConstantArrayType>(CanonicalType); 4155} 4156inline bool Type::isIncompleteArrayType() const { 4157 return isa<IncompleteArrayType>(CanonicalType); 4158} 4159inline bool Type::isVariableArrayType() const { 4160 return isa<VariableArrayType>(CanonicalType); 4161} 4162inline bool Type::isDependentSizedArrayType() const { 4163 return isa<DependentSizedArrayType>(CanonicalType); 4164} 4165inline bool Type::isBuiltinType() const { 4166 return isa<BuiltinType>(CanonicalType); 4167} 4168inline bool Type::isRecordType() const { 4169 return isa<RecordType>(CanonicalType); 4170} 4171inline bool Type::isEnumeralType() const { 4172 return isa<EnumType>(CanonicalType); 4173} 4174inline bool Type::isAnyComplexType() const { 4175 return isa<ComplexType>(CanonicalType); 4176} 4177inline bool Type::isVectorType() const { 4178 return isa<VectorType>(CanonicalType); 4179} 4180inline bool Type::isExtVectorType() const { 4181 return isa<ExtVectorType>(CanonicalType); 4182} 4183inline bool Type::isObjCObjectPointerType() const { 4184 return isa<ObjCObjectPointerType>(CanonicalType); 4185} 4186inline bool Type::isObjCObjectType() const { 4187 return isa<ObjCObjectType>(CanonicalType); 4188} 4189inline bool Type::isObjCObjectOrInterfaceType() const { 4190 return isa<ObjCInterfaceType>(CanonicalType) || 4191 isa<ObjCObjectType>(CanonicalType); 4192} 4193 4194inline bool Type::isObjCQualifiedIdType() const { 4195 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4196 return OPT->isObjCQualifiedIdType(); 4197 return false; 4198} 4199inline bool Type::isObjCQualifiedClassType() const { 4200 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4201 return OPT->isObjCQualifiedClassType(); 4202 return false; 4203} 4204inline bool Type::isObjCIdType() const { 4205 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4206 return OPT->isObjCIdType(); 4207 return false; 4208} 4209inline bool Type::isObjCClassType() const { 4210 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4211 return OPT->isObjCClassType(); 4212 return false; 4213} 4214inline bool Type::isObjCSelType() const { 4215 if (const PointerType *OPT = getAs<PointerType>()) 4216 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4217 return false; 4218} 4219inline bool Type::isObjCBuiltinType() const { 4220 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4221} 4222inline bool Type::isTemplateTypeParmType() const { 4223 return isa<TemplateTypeParmType>(CanonicalType); 4224} 4225 4226inline bool Type::isSpecificBuiltinType(unsigned K) const { 4227 if (const BuiltinType *BT = getAs<BuiltinType>()) 4228 if (BT->getKind() == (BuiltinType::Kind) K) 4229 return true; 4230 return false; 4231} 4232 4233inline bool Type::isPlaceholderType() const { 4234 if (const BuiltinType *BT = getAs<BuiltinType>()) 4235 return BT->isPlaceholderType(); 4236 return false; 4237} 4238 4239/// \brief Determines whether this is a type for which one can define 4240/// an overloaded operator. 4241inline bool Type::isOverloadableType() const { 4242 return isDependentType() || isRecordType() || isEnumeralType(); 4243} 4244 4245inline bool Type::hasPointerRepresentation() const { 4246 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4247 isObjCObjectPointerType() || isNullPtrType()); 4248} 4249 4250inline bool Type::hasObjCPointerRepresentation() const { 4251 return isObjCObjectPointerType(); 4252} 4253 4254inline const Type *Type::getBaseElementTypeUnsafe() const { 4255 const Type *type = this; 4256 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4257 type = arrayType->getElementType().getTypePtr(); 4258 return type; 4259} 4260 4261/// Insertion operator for diagnostics. This allows sending QualType's into a 4262/// diagnostic with <<. 4263inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4264 QualType T) { 4265 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4266 Diagnostic::ak_qualtype); 4267 return DB; 4268} 4269 4270/// Insertion operator for partial diagnostics. This allows sending QualType's 4271/// into a diagnostic with <<. 4272inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4273 QualType T) { 4274 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4275 Diagnostic::ak_qualtype); 4276 return PD; 4277} 4278 4279// Helper class template that is used by Type::getAs to ensure that one does 4280// not try to look through a qualified type to get to an array type. 4281template<typename T, 4282 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4283 llvm::is_base_of<ArrayType, T>::value)> 4284struct ArrayType_cannot_be_used_with_getAs { }; 4285 4286template<typename T> 4287struct ArrayType_cannot_be_used_with_getAs<T, true>; 4288 4289/// Member-template getAs<specific type>'. 4290template <typename T> const T *Type::getAs() const { 4291 ArrayType_cannot_be_used_with_getAs<T> at; 4292 (void)at; 4293 4294 // If this is directly a T type, return it. 4295 if (const T *Ty = dyn_cast<T>(this)) 4296 return Ty; 4297 4298 // If the canonical form of this type isn't the right kind, reject it. 4299 if (!isa<T>(CanonicalType)) 4300 return 0; 4301 4302 // If this is a typedef for the type, strip the typedef off without 4303 // losing all typedef information. 4304 return cast<T>(getUnqualifiedDesugaredType()); 4305} 4306 4307inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4308 // If this is directly an array type, return it. 4309 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4310 return arr; 4311 4312 // If the canonical form of this type isn't the right kind, reject it. 4313 if (!isa<ArrayType>(CanonicalType)) 4314 return 0; 4315 4316 // If this is a typedef for the type, strip the typedef off without 4317 // losing all typedef information. 4318 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4319} 4320 4321template <typename T> const T *Type::castAs() const { 4322 ArrayType_cannot_be_used_with_getAs<T> at; 4323 (void) at; 4324 4325 assert(isa<T>(CanonicalType)); 4326 if (const T *ty = dyn_cast<T>(this)) return ty; 4327 return cast<T>(getUnqualifiedDesugaredType()); 4328} 4329 4330inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4331 assert(isa<ArrayType>(CanonicalType)); 4332 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4333 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4334} 4335 4336} // end namespace clang 4337 4338#endif 4339