Type.h revision 7536dd5e6c99584481b7dab68b7e7d8df9c54054
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/PointerIntPair.h" 29#include "llvm/ADT/PointerUnion.h" 30 31using llvm::isa; 32using llvm::cast; 33using llvm::cast_or_null; 34using llvm::dyn_cast; 35using llvm::dyn_cast_or_null; 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class ObjCInterfaceDecl; 85 class ObjCProtocolDecl; 86 class ObjCMethodDecl; 87 class UnresolvedUsingTypenameDecl; 88 class Expr; 89 class Stmt; 90 class SourceLocation; 91 class StmtIteratorBase; 92 class TemplateArgument; 93 class TemplateArgumentLoc; 94 class TemplateArgumentListInfo; 95 class ElaboratedType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 3, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool isSupersetOf(Qualifiers Other) const; 275 276 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 277 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 278 279 operator bool() const { return hasQualifiers(); } 280 281 Qualifiers &operator+=(Qualifiers R) { 282 addQualifiers(R); 283 return *this; 284 } 285 286 // Union two qualifier sets. If an enumerated qualifier appears 287 // in both sets, use the one from the right. 288 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 289 L += R; 290 return L; 291 } 292 293 Qualifiers &operator-=(Qualifiers R) { 294 Mask = Mask & ~(R.Mask); 295 return *this; 296 } 297 298 /// \brief Compute the difference between two qualifier sets. 299 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 300 L -= R; 301 return L; 302 } 303 304 std::string getAsString() const; 305 std::string getAsString(const PrintingPolicy &Policy) const { 306 std::string Buffer; 307 getAsStringInternal(Buffer, Policy); 308 return Buffer; 309 } 310 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 311 312 void Profile(llvm::FoldingSetNodeID &ID) const { 313 ID.AddInteger(Mask); 314 } 315 316private: 317 318 // bits: |0 1 2|3 .. 4|5 .. 31| 319 // |C R V|GCAttr|AddrSpace| 320 uint32_t Mask; 321 322 static const uint32_t GCAttrMask = 0x18; 323 static const uint32_t GCAttrShift = 3; 324 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 325 static const uint32_t AddressSpaceShift = 5; 326}; 327 328/// \brief Base class that is common to both the \c ExtQuals and \c Type 329/// classes, which allows \c QualType to access the common fields between the 330/// two. 331/// 332class ExtQualsTypeCommonBase { 333protected: 334 ExtQualsTypeCommonBase(const Type *BaseType) : BaseType(BaseType) { } 335 336 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 337 /// a self-referential pointer (for \c Type). 338 /// 339 /// This pointer allows an efficient mapping from a QualType to its 340 /// underlying type pointer. 341 const Type *BaseType; 342 343 friend class QualType; 344}; 345 346/// ExtQuals - We can encode up to four bits in the low bits of a 347/// type pointer, but there are many more type qualifiers that we want 348/// to be able to apply to an arbitrary type. Therefore we have this 349/// struct, intended to be heap-allocated and used by QualType to 350/// store qualifiers. 351/// 352/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 353/// in three low bits on the QualType pointer; a fourth bit records whether 354/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 355/// Objective-C GC attributes) are much more rare. 356class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 357 // NOTE: changing the fast qualifiers should be straightforward as 358 // long as you don't make 'const' non-fast. 359 // 1. Qualifiers: 360 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 361 // Fast qualifiers must occupy the low-order bits. 362 // b) Update Qualifiers::FastWidth and FastMask. 363 // 2. QualType: 364 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 365 // b) Update remove{Volatile,Restrict}, defined near the end of 366 // this header. 367 // 3. ASTContext: 368 // a) Update get{Volatile,Restrict}Type. 369 370 /// Quals - the immutable set of qualifiers applied by this 371 /// node; always contains extended qualifiers. 372 Qualifiers Quals; 373 374public: 375 ExtQuals(const Type *Base, Qualifiers Quals) 376 : ExtQualsTypeCommonBase(Base), Quals(Quals) 377 { 378 assert(Quals.hasNonFastQualifiers() 379 && "ExtQuals created with no fast qualifiers"); 380 assert(!Quals.hasFastQualifiers() 381 && "ExtQuals created with fast qualifiers"); 382 } 383 384 Qualifiers getQualifiers() const { return Quals; } 385 386 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 387 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 388 389 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 390 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 391 392 const Type *getBaseType() const { return BaseType; } 393 394public: 395 void Profile(llvm::FoldingSetNodeID &ID) const { 396 Profile(ID, getBaseType(), Quals); 397 } 398 static void Profile(llvm::FoldingSetNodeID &ID, 399 const Type *BaseType, 400 Qualifiers Quals) { 401 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 402 ID.AddPointer(BaseType); 403 Quals.Profile(ID); 404 } 405}; 406 407/// CallingConv - Specifies the calling convention that a function uses. 408enum CallingConv { 409 CC_Default, 410 CC_C, // __attribute__((cdecl)) 411 CC_X86StdCall, // __attribute__((stdcall)) 412 CC_X86FastCall, // __attribute__((fastcall)) 413 CC_X86ThisCall, // __attribute__((thiscall)) 414 CC_X86Pascal // __attribute__((pascal)) 415}; 416 417typedef std::pair<const Type*, Qualifiers> SplitQualType; 418 419/// QualType - For efficiency, we don't store CV-qualified types as nodes on 420/// their own: instead each reference to a type stores the qualifiers. This 421/// greatly reduces the number of nodes we need to allocate for types (for 422/// example we only need one for 'int', 'const int', 'volatile int', 423/// 'const volatile int', etc). 424/// 425/// As an added efficiency bonus, instead of making this a pair, we 426/// just store the two bits we care about in the low bits of the 427/// pointer. To handle the packing/unpacking, we make QualType be a 428/// simple wrapper class that acts like a smart pointer. A third bit 429/// indicates whether there are extended qualifiers present, in which 430/// case the pointer points to a special structure. 431class QualType { 432 // Thankfully, these are efficiently composable. 433 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 434 Qualifiers::FastWidth> Value; 435 436 const ExtQuals *getExtQualsUnsafe() const { 437 return Value.getPointer().get<const ExtQuals*>(); 438 } 439 440 const Type *getTypePtrUnsafe() const { 441 return Value.getPointer().get<const Type*>(); 442 } 443 444 QualType getUnqualifiedTypeSlow() const; 445 446 friend class QualifierCollector; 447public: 448 QualType() {} 449 450 QualType(const Type *Ptr, unsigned Quals) 451 : Value(Ptr, Quals) {} 452 QualType(const ExtQuals *Ptr, unsigned Quals) 453 : Value(Ptr, Quals) {} 454 455 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 456 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 457 458 /// Retrieves a pointer to the underlying (unqualified) type. 459 /// This should really return a const Type, but it's not worth 460 /// changing all the users right now. 461 /// 462 /// This function requires that the type not be NULL. If the type might be 463 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 464 Type *getTypePtr() const { 465 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 466 uintptr_t CommonPtrVal 467 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 468 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 469 ExtQualsTypeCommonBase *CommonPtr 470 = reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 471 return const_cast<Type *>(CommonPtr->BaseType); 472 } 473 474 Type *getTypePtrOrNull() const { 475 uintptr_t TypePtrPtrVal 476 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 477 TypePtrPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 478 Type **TypePtrPtr = reinterpret_cast<Type**>(TypePtrPtrVal); 479 return TypePtrPtr? *TypePtrPtr : 0; 480 } 481 482 /// Divides a QualType into its unqualified type and a set of local 483 /// qualifiers. 484 SplitQualType split() const { 485 if (!hasLocalNonFastQualifiers()) 486 return SplitQualType(getTypePtrUnsafe(), 487 Qualifiers::fromFastMask(getLocalFastQualifiers())); 488 489 const ExtQuals *eq = getExtQualsUnsafe(); 490 Qualifiers qs = eq->getQualifiers(); 491 qs.addFastQualifiers(getLocalFastQualifiers()); 492 return SplitQualType(eq->getBaseType(), qs); 493 } 494 495 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 496 static QualType getFromOpaquePtr(void *Ptr) { 497 QualType T; 498 T.Value.setFromOpaqueValue(Ptr); 499 return T; 500 } 501 502 Type &operator*() const { 503 return *getTypePtr(); 504 } 505 506 Type *operator->() const { 507 return getTypePtr(); 508 } 509 510 bool isCanonical() const; 511 bool isCanonicalAsParam() const; 512 513 /// isNull - Return true if this QualType doesn't point to a type yet. 514 bool isNull() const { 515 return Value.getPointer().isNull(); 516 } 517 518 /// \brief Determine whether this particular QualType instance has the 519 /// "const" qualifier set, without looking through typedefs that may have 520 /// added "const" at a different level. 521 bool isLocalConstQualified() const { 522 return (getLocalFastQualifiers() & Qualifiers::Const); 523 } 524 525 /// \brief Determine whether this type is const-qualified. 526 bool isConstQualified() const; 527 528 /// \brief Determine whether this particular QualType instance has the 529 /// "restrict" qualifier set, without looking through typedefs that may have 530 /// added "restrict" at a different level. 531 bool isLocalRestrictQualified() const { 532 return (getLocalFastQualifiers() & Qualifiers::Restrict); 533 } 534 535 /// \brief Determine whether this type is restrict-qualified. 536 bool isRestrictQualified() const; 537 538 /// \brief Determine whether this particular QualType instance has the 539 /// "volatile" qualifier set, without looking through typedefs that may have 540 /// added "volatile" at a different level. 541 bool isLocalVolatileQualified() const { 542 return (getLocalFastQualifiers() & Qualifiers::Volatile); 543 } 544 545 /// \brief Determine whether this type is volatile-qualified. 546 bool isVolatileQualified() const; 547 548 /// \brief Determine whether this particular QualType instance has any 549 /// qualifiers, without looking through any typedefs that might add 550 /// qualifiers at a different level. 551 bool hasLocalQualifiers() const { 552 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 553 } 554 555 /// \brief Determine whether this type has any qualifiers. 556 bool hasQualifiers() const; 557 558 /// \brief Determine whether this particular QualType instance has any 559 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 560 /// instance. 561 bool hasLocalNonFastQualifiers() const { 562 return Value.getPointer().is<const ExtQuals*>(); 563 } 564 565 /// \brief Retrieve the set of qualifiers local to this particular QualType 566 /// instance, not including any qualifiers acquired through typedefs or 567 /// other sugar. 568 Qualifiers getLocalQualifiers() const { 569 Qualifiers Quals; 570 if (hasLocalNonFastQualifiers()) 571 Quals = getExtQualsUnsafe()->getQualifiers(); 572 Quals.addFastQualifiers(getLocalFastQualifiers()); 573 return Quals; 574 } 575 576 /// \brief Retrieve the set of qualifiers applied to this type. 577 Qualifiers getQualifiers() const; 578 579 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 580 /// local to this particular QualType instance, not including any qualifiers 581 /// acquired through typedefs or other sugar. 582 unsigned getLocalCVRQualifiers() const { 583 return getLocalFastQualifiers(); 584 } 585 586 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 587 /// applied to this type. 588 unsigned getCVRQualifiers() const; 589 590 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 591 /// applied to this type, looking through any number of unqualified array 592 /// types to their element types' qualifiers. 593 unsigned getCVRQualifiersThroughArrayTypes() const; 594 595 bool isConstant(ASTContext& Ctx) const { 596 return QualType::isConstant(*this, Ctx); 597 } 598 599 // Don't promise in the API that anything besides 'const' can be 600 // easily added. 601 602 /// addConst - add the specified type qualifier to this QualType. 603 void addConst() { 604 addFastQualifiers(Qualifiers::Const); 605 } 606 QualType withConst() const { 607 return withFastQualifiers(Qualifiers::Const); 608 } 609 610 void addFastQualifiers(unsigned TQs) { 611 assert(!(TQs & ~Qualifiers::FastMask) 612 && "non-fast qualifier bits set in mask!"); 613 Value.setInt(Value.getInt() | TQs); 614 } 615 616 void removeLocalConst(); 617 void removeLocalVolatile(); 618 void removeLocalRestrict(); 619 void removeLocalCVRQualifiers(unsigned Mask); 620 621 void removeLocalFastQualifiers() { Value.setInt(0); } 622 void removeLocalFastQualifiers(unsigned Mask) { 623 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 624 Value.setInt(Value.getInt() & ~Mask); 625 } 626 627 // Creates a type with the given qualifiers in addition to any 628 // qualifiers already on this type. 629 QualType withFastQualifiers(unsigned TQs) const { 630 QualType T = *this; 631 T.addFastQualifiers(TQs); 632 return T; 633 } 634 635 // Creates a type with exactly the given fast qualifiers, removing 636 // any existing fast qualifiers. 637 QualType withExactLocalFastQualifiers(unsigned TQs) const { 638 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 639 } 640 641 // Removes fast qualifiers, but leaves any extended qualifiers in place. 642 QualType withoutLocalFastQualifiers() const { 643 QualType T = *this; 644 T.removeLocalFastQualifiers(); 645 return T; 646 } 647 648 /// \brief Return this type with all of the instance-specific qualifiers 649 /// removed, but without removing any qualifiers that may have been applied 650 /// through typedefs. 651 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 652 653 /// \brief Return the unqualified form of the given type, which might be 654 /// desugared to eliminate qualifiers introduced via typedefs. 655 QualType getUnqualifiedType() const { 656 QualType T = getLocalUnqualifiedType(); 657 if (!T.hasQualifiers()) 658 return T; 659 660 return getUnqualifiedTypeSlow(); 661 } 662 663 bool isMoreQualifiedThan(QualType Other) const; 664 bool isAtLeastAsQualifiedAs(QualType Other) const; 665 QualType getNonReferenceType() const; 666 667 /// \brief Determine the type of a (typically non-lvalue) expression with the 668 /// specified result type. 669 /// 670 /// This routine should be used for expressions for which the return type is 671 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 672 /// an lvalue. It removes a top-level reference (since there are no 673 /// expressions of reference type) and deletes top-level cvr-qualifiers 674 /// from non-class types (in C++) or all types (in C). 675 QualType getNonLValueExprType(ASTContext &Context) const; 676 677 /// getDesugaredType - Return the specified type with any "sugar" removed from 678 /// the type. This takes off typedefs, typeof's etc. If the outer level of 679 /// the type is already concrete, it returns it unmodified. This is similar 680 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 681 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 682 /// concrete. 683 /// 684 /// Qualifiers are left in place. 685 QualType getDesugaredType(ASTContext &Context) const { 686 return getDesugaredType(*this, Context); 687 } 688 689 SplitQualType getSplitDesugaredType() const { 690 return getSplitDesugaredType(*this); 691 } 692 693 /// IgnoreParens - Returns the specified type after dropping any 694 /// outer-level parentheses. 695 QualType IgnoreParens() const { 696 if (isa<ParenType>(*this)) 697 return QualType::IgnoreParens(*this); 698 return *this; 699 } 700 701 /// operator==/!= - Indicate whether the specified types and qualifiers are 702 /// identical. 703 friend bool operator==(const QualType &LHS, const QualType &RHS) { 704 return LHS.Value == RHS.Value; 705 } 706 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 707 return LHS.Value != RHS.Value; 708 } 709 std::string getAsString() const { 710 return getAsString(split()); 711 } 712 static std::string getAsString(SplitQualType split) { 713 return getAsString(split.first, split.second); 714 } 715 static std::string getAsString(const Type *ty, Qualifiers qs); 716 717 std::string getAsString(const PrintingPolicy &Policy) const { 718 std::string S; 719 getAsStringInternal(S, Policy); 720 return S; 721 } 722 void getAsStringInternal(std::string &Str, 723 const PrintingPolicy &Policy) const { 724 return getAsStringInternal(split(), Str, Policy); 725 } 726 static void getAsStringInternal(SplitQualType split, std::string &out, 727 const PrintingPolicy &policy) { 728 return getAsStringInternal(split.first, split.second, out, policy); 729 } 730 static void getAsStringInternal(const Type *ty, Qualifiers qs, 731 std::string &out, 732 const PrintingPolicy &policy); 733 734 void dump(const char *s) const; 735 void dump() const; 736 737 void Profile(llvm::FoldingSetNodeID &ID) const { 738 ID.AddPointer(getAsOpaquePtr()); 739 } 740 741 /// getAddressSpace - Return the address space of this type. 742 inline unsigned getAddressSpace() const; 743 744 /// GCAttrTypesAttr - Returns gc attribute of this type. 745 inline Qualifiers::GC getObjCGCAttr() const; 746 747 /// isObjCGCWeak true when Type is objc's weak. 748 bool isObjCGCWeak() const { 749 return getObjCGCAttr() == Qualifiers::Weak; 750 } 751 752 /// isObjCGCStrong true when Type is objc's strong. 753 bool isObjCGCStrong() const { 754 return getObjCGCAttr() == Qualifiers::Strong; 755 } 756 757private: 758 // These methods are implemented in a separate translation unit; 759 // "static"-ize them to avoid creating temporary QualTypes in the 760 // caller. 761 static bool isConstant(QualType T, ASTContext& Ctx); 762 static QualType getDesugaredType(QualType T, ASTContext &Context); 763 static SplitQualType getSplitDesugaredType(QualType T); 764 static QualType IgnoreParens(QualType T); 765}; 766 767} // end clang. 768 769namespace llvm { 770/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 771/// to a specific Type class. 772template<> struct simplify_type<const ::clang::QualType> { 773 typedef ::clang::Type* SimpleType; 774 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 775 return Val.getTypePtr(); 776 } 777}; 778template<> struct simplify_type< ::clang::QualType> 779 : public simplify_type<const ::clang::QualType> {}; 780 781// Teach SmallPtrSet that QualType is "basically a pointer". 782template<> 783class PointerLikeTypeTraits<clang::QualType> { 784public: 785 static inline void *getAsVoidPointer(clang::QualType P) { 786 return P.getAsOpaquePtr(); 787 } 788 static inline clang::QualType getFromVoidPointer(void *P) { 789 return clang::QualType::getFromOpaquePtr(P); 790 } 791 // Various qualifiers go in low bits. 792 enum { NumLowBitsAvailable = 0 }; 793}; 794 795} // end namespace llvm 796 797namespace clang { 798 799/// Type - This is the base class of the type hierarchy. A central concept 800/// with types is that each type always has a canonical type. A canonical type 801/// is the type with any typedef names stripped out of it or the types it 802/// references. For example, consider: 803/// 804/// typedef int foo; 805/// typedef foo* bar; 806/// 'int *' 'foo *' 'bar' 807/// 808/// There will be a Type object created for 'int'. Since int is canonical, its 809/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 810/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 811/// there is a PointerType that represents 'int*', which, like 'int', is 812/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 813/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 814/// is also 'int*'. 815/// 816/// Non-canonical types are useful for emitting diagnostics, without losing 817/// information about typedefs being used. Canonical types are useful for type 818/// comparisons (they allow by-pointer equality tests) and useful for reasoning 819/// about whether something has a particular form (e.g. is a function type), 820/// because they implicitly, recursively, strip all typedefs out of a type. 821/// 822/// Types, once created, are immutable. 823/// 824class Type : public ExtQualsTypeCommonBase { 825public: 826 enum TypeClass { 827#define TYPE(Class, Base) Class, 828#define LAST_TYPE(Class) TypeLast = Class, 829#define ABSTRACT_TYPE(Class, Base) 830#include "clang/AST/TypeNodes.def" 831 TagFirst = Record, TagLast = Enum 832 }; 833 834private: 835 Type(const Type&); // DO NOT IMPLEMENT. 836 void operator=(const Type&); // DO NOT IMPLEMENT. 837 838 QualType CanonicalType; 839 840 /// Bitfields required by the Type class. 841 class TypeBitfields { 842 friend class Type; 843 template <class T> friend class TypePropertyCache; 844 845 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 846 unsigned TC : 8; 847 848 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 849 /// Note that this should stay at the end of the ivars for Type so that 850 /// subclasses can pack their bitfields into the same word. 851 unsigned Dependent : 1; 852 853 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 854 unsigned VariablyModified : 1; 855 856 /// \brief Whether this type contains an unexpanded parameter pack 857 /// (for C++0x variadic templates). 858 unsigned ContainsUnexpandedParameterPack : 1; 859 860 /// \brief Nonzero if the cache (i.e. the bitfields here starting 861 /// with 'Cache') is valid. If so, then this is a 862 /// LangOptions::VisibilityMode+1. 863 mutable unsigned CacheValidAndVisibility : 2; 864 865 /// \brief Linkage of this type. 866 mutable unsigned CachedLinkage : 2; 867 868 /// \brief Whether this type involves and local or unnamed types. 869 mutable unsigned CachedLocalOrUnnamed : 1; 870 871 /// \brief FromAST - Whether this type comes from an AST file. 872 mutable unsigned FromAST : 1; 873 874 bool isCacheValid() const { 875 return (CacheValidAndVisibility != 0); 876 } 877 Visibility getVisibility() const { 878 assert(isCacheValid() && "getting linkage from invalid cache"); 879 return static_cast<Visibility>(CacheValidAndVisibility-1); 880 } 881 Linkage getLinkage() const { 882 assert(isCacheValid() && "getting linkage from invalid cache"); 883 return static_cast<Linkage>(CachedLinkage); 884 } 885 bool hasLocalOrUnnamedType() const { 886 assert(isCacheValid() && "getting linkage from invalid cache"); 887 return CachedLocalOrUnnamed; 888 } 889 }; 890 enum { NumTypeBits = 17 }; 891 892protected: 893 // These classes allow subclasses to somewhat cleanly pack bitfields 894 // into Type. 895 896 class ArrayTypeBitfields { 897 friend class ArrayType; 898 899 unsigned : NumTypeBits; 900 901 /// IndexTypeQuals - CVR qualifiers from declarations like 902 /// 'int X[static restrict 4]'. For function parameters only. 903 unsigned IndexTypeQuals : 3; 904 905 /// SizeModifier - storage class qualifiers from declarations like 906 /// 'int X[static restrict 4]'. For function parameters only. 907 /// Actually an ArrayType::ArraySizeModifier. 908 unsigned SizeModifier : 3; 909 }; 910 911 class BuiltinTypeBitfields { 912 friend class BuiltinType; 913 914 unsigned : NumTypeBits; 915 916 /// The kind (BuiltinType::Kind) of builtin type this is. 917 unsigned Kind : 8; 918 }; 919 920 class FunctionTypeBitfields { 921 friend class FunctionType; 922 923 unsigned : NumTypeBits; 924 925 /// Extra information which affects how the function is called, like 926 /// regparm and the calling convention. 927 unsigned ExtInfo : 8; 928 929 /// Whether the function is variadic. Only used by FunctionProtoType. 930 unsigned Variadic : 1; 931 932 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 933 /// other bitfields. 934 /// The qualifiers are part of FunctionProtoType because... 935 /// 936 /// C++ 8.3.5p4: The return type, the parameter type list and the 937 /// cv-qualifier-seq, [...], are part of the function type. 938 unsigned TypeQuals : 3; 939 }; 940 941 class ObjCObjectTypeBitfields { 942 friend class ObjCObjectType; 943 944 unsigned : NumTypeBits; 945 946 /// NumProtocols - The number of protocols stored directly on this 947 /// object type. 948 unsigned NumProtocols : 32 - NumTypeBits; 949 }; 950 951 class ReferenceTypeBitfields { 952 friend class ReferenceType; 953 954 unsigned : NumTypeBits; 955 956 /// True if the type was originally spelled with an lvalue sigil. 957 /// This is never true of rvalue references but can also be false 958 /// on lvalue references because of C++0x [dcl.typedef]p9, 959 /// as follows: 960 /// 961 /// typedef int &ref; // lvalue, spelled lvalue 962 /// typedef int &&rvref; // rvalue 963 /// ref &a; // lvalue, inner ref, spelled lvalue 964 /// ref &&a; // lvalue, inner ref 965 /// rvref &a; // lvalue, inner ref, spelled lvalue 966 /// rvref &&a; // rvalue, inner ref 967 unsigned SpelledAsLValue : 1; 968 969 /// True if the inner type is a reference type. This only happens 970 /// in non-canonical forms. 971 unsigned InnerRef : 1; 972 }; 973 974 class TypeWithKeywordBitfields { 975 friend class TypeWithKeyword; 976 977 unsigned : NumTypeBits; 978 979 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 980 unsigned Keyword : 8; 981 }; 982 983 class VectorTypeBitfields { 984 friend class VectorType; 985 986 unsigned : NumTypeBits; 987 988 /// VecKind - The kind of vector, either a generic vector type or some 989 /// target-specific vector type such as for AltiVec or Neon. 990 unsigned VecKind : 3; 991 992 /// NumElements - The number of elements in the vector. 993 unsigned NumElements : 29 - NumTypeBits; 994 }; 995 996 union { 997 TypeBitfields TypeBits; 998 ArrayTypeBitfields ArrayTypeBits; 999 BuiltinTypeBitfields BuiltinTypeBits; 1000 FunctionTypeBitfields FunctionTypeBits; 1001 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1002 ReferenceTypeBitfields ReferenceTypeBits; 1003 TypeWithKeywordBitfields TypeWithKeywordBits; 1004 VectorTypeBitfields VectorTypeBits; 1005 }; 1006 1007private: 1008 /// \brief Set whether this type comes from an AST file. 1009 void setFromAST(bool V = true) const { 1010 TypeBits.FromAST = V; 1011 } 1012 1013 template <class T> friend class TypePropertyCache; 1014 1015protected: 1016 // silence VC++ warning C4355: 'this' : used in base member initializer list 1017 Type *this_() { return this; } 1018 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified, 1019 bool ContainsUnexpandedParameterPack) 1020 : ExtQualsTypeCommonBase(this), 1021 CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical) { 1022 TypeBits.TC = tc; 1023 TypeBits.Dependent = Dependent; 1024 TypeBits.VariablyModified = VariablyModified; 1025 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1026 TypeBits.CacheValidAndVisibility = 0; 1027 TypeBits.CachedLocalOrUnnamed = false; 1028 TypeBits.CachedLinkage = NoLinkage; 1029 TypeBits.FromAST = false; 1030 } 1031 friend class ASTContext; 1032 1033 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1034 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1035 void setContainsUnexpandedParameterPack(bool PP = true) { 1036 TypeBits.ContainsUnexpandedParameterPack = PP; 1037 } 1038 1039public: 1040 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1041 1042 /// \brief Whether this type comes from an AST file. 1043 bool isFromAST() const { return TypeBits.FromAST; } 1044 1045 /// \brief Whether this type is or contains an unexpanded parameter 1046 /// pack, used to support C++0x variadic templates. 1047 /// 1048 /// A type that contains a parameter pack shall be expanded by the 1049 /// ellipsis operator at some point. For example, the typedef in the 1050 /// following example contains an unexpanded parameter pack 'T': 1051 /// 1052 /// \code 1053 /// template<typename ...T> 1054 /// struct X { 1055 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1056 /// }; 1057 /// \endcode 1058 /// 1059 /// Note that this routine does not specify which 1060 bool containsUnexpandedParameterPack() const { 1061 return TypeBits.ContainsUnexpandedParameterPack; 1062 } 1063 1064 bool isCanonicalUnqualified() const { 1065 return CanonicalType.getTypePtr() == this; 1066 } 1067 1068 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1069 /// object types, function types, and incomplete types. 1070 1071 /// isIncompleteType - Return true if this is an incomplete type. 1072 /// A type that can describe objects, but which lacks information needed to 1073 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1074 /// routine will need to determine if the size is actually required. 1075 bool isIncompleteType() const; 1076 1077 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1078 /// type, in other words, not a function type. 1079 bool isIncompleteOrObjectType() const { 1080 return !isFunctionType(); 1081 } 1082 1083 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1084 bool isPODType() const; 1085 1086 /// isLiteralType - Return true if this is a literal type 1087 /// (C++0x [basic.types]p10) 1088 bool isLiteralType() const; 1089 1090 /// Helper methods to distinguish type categories. All type predicates 1091 /// operate on the canonical type, ignoring typedefs and qualifiers. 1092 1093 /// isBuiltinType - returns true if the type is a builtin type. 1094 bool isBuiltinType() const; 1095 1096 /// isSpecificBuiltinType - Test for a particular builtin type. 1097 bool isSpecificBuiltinType(unsigned K) const; 1098 1099 /// isPlaceholderType - Test for a type which does not represent an 1100 /// actual type-system type but is instead used as a placeholder for 1101 /// various convenient purposes within Clang. All such types are 1102 /// BuiltinTypes. 1103 bool isPlaceholderType() const; 1104 1105 /// isIntegerType() does *not* include complex integers (a GCC extension). 1106 /// isComplexIntegerType() can be used to test for complex integers. 1107 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1108 bool isEnumeralType() const; 1109 bool isBooleanType() const; 1110 bool isCharType() const; 1111 bool isWideCharType() const; 1112 bool isAnyCharacterType() const; 1113 bool isIntegralType(ASTContext &Ctx) const; 1114 1115 /// \brief Determine whether this type is an integral or enumeration type. 1116 bool isIntegralOrEnumerationType() const; 1117 /// \brief Determine whether this type is an integral or unscoped enumeration 1118 /// type. 1119 bool isIntegralOrUnscopedEnumerationType() const; 1120 1121 /// Floating point categories. 1122 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1123 /// isComplexType() does *not* include complex integers (a GCC extension). 1124 /// isComplexIntegerType() can be used to test for complex integers. 1125 bool isComplexType() const; // C99 6.2.5p11 (complex) 1126 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1127 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1128 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1129 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1130 bool isVoidType() const; // C99 6.2.5p19 1131 bool isDerivedType() const; // C99 6.2.5p20 1132 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1133 bool isAggregateType() const; 1134 1135 // Type Predicates: Check to see if this type is structurally the specified 1136 // type, ignoring typedefs and qualifiers. 1137 bool isFunctionType() const; 1138 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1139 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1140 bool isPointerType() const; 1141 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1142 bool isBlockPointerType() const; 1143 bool isVoidPointerType() const; 1144 bool isReferenceType() const; 1145 bool isLValueReferenceType() const; 1146 bool isRValueReferenceType() const; 1147 bool isFunctionPointerType() const; 1148 bool isMemberPointerType() const; 1149 bool isMemberFunctionPointerType() const; 1150 bool isMemberDataPointerType() const; 1151 bool isArrayType() const; 1152 bool isConstantArrayType() const; 1153 bool isIncompleteArrayType() const; 1154 bool isVariableArrayType() const; 1155 bool isDependentSizedArrayType() const; 1156 bool isRecordType() const; 1157 bool isClassType() const; 1158 bool isStructureType() const; 1159 bool isStructureOrClassType() const; 1160 bool isUnionType() const; 1161 bool isComplexIntegerType() const; // GCC _Complex integer type. 1162 bool isVectorType() const; // GCC vector type. 1163 bool isExtVectorType() const; // Extended vector type. 1164 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1165 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1166 // for the common case. 1167 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1168 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1169 bool isObjCQualifiedIdType() const; // id<foo> 1170 bool isObjCQualifiedClassType() const; // Class<foo> 1171 bool isObjCObjectOrInterfaceType() const; 1172 bool isObjCIdType() const; // id 1173 bool isObjCClassType() const; // Class 1174 bool isObjCSelType() const; // Class 1175 bool isObjCBuiltinType() const; // 'id' or 'Class' 1176 bool isTemplateTypeParmType() const; // C++ template type parameter 1177 bool isNullPtrType() const; // C++0x nullptr_t 1178 1179 enum ScalarTypeKind { 1180 STK_Pointer, 1181 STK_MemberPointer, 1182 STK_Bool, 1183 STK_Integral, 1184 STK_Floating, 1185 STK_IntegralComplex, 1186 STK_FloatingComplex 1187 }; 1188 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1189 ScalarTypeKind getScalarTypeKind() const; 1190 1191 /// isDependentType - Whether this type is a dependent type, meaning 1192 /// that its definition somehow depends on a template parameter 1193 /// (C++ [temp.dep.type]). 1194 bool isDependentType() const { return TypeBits.Dependent; } 1195 1196 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1197 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1198 1199 /// \brief Whether this type is or contains a local or unnamed type. 1200 bool hasUnnamedOrLocalType() const; 1201 1202 bool isOverloadableType() const; 1203 1204 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1205 bool isElaboratedTypeSpecifier() const; 1206 1207 /// hasPointerRepresentation - Whether this type is represented 1208 /// natively as a pointer; this includes pointers, references, block 1209 /// pointers, and Objective-C interface, qualified id, and qualified 1210 /// interface types, as well as nullptr_t. 1211 bool hasPointerRepresentation() const; 1212 1213 /// hasObjCPointerRepresentation - Whether this type can represent 1214 /// an objective pointer type for the purpose of GC'ability 1215 bool hasObjCPointerRepresentation() const; 1216 1217 /// \brief Determine whether this type has an integer representation 1218 /// of some sort, e.g., it is an integer type or a vector. 1219 bool hasIntegerRepresentation() const; 1220 1221 /// \brief Determine whether this type has an signed integer representation 1222 /// of some sort, e.g., it is an signed integer type or a vector. 1223 bool hasSignedIntegerRepresentation() const; 1224 1225 /// \brief Determine whether this type has an unsigned integer representation 1226 /// of some sort, e.g., it is an unsigned integer type or a vector. 1227 bool hasUnsignedIntegerRepresentation() const; 1228 1229 /// \brief Determine whether this type has a floating-point representation 1230 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1231 bool hasFloatingRepresentation() const; 1232 1233 // Type Checking Functions: Check to see if this type is structurally the 1234 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1235 // the best type we can. 1236 const RecordType *getAsStructureType() const; 1237 /// NOTE: getAs*ArrayType are methods on ASTContext. 1238 const RecordType *getAsUnionType() const; 1239 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1240 // The following is a convenience method that returns an ObjCObjectPointerType 1241 // for object declared using an interface. 1242 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1243 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1244 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1245 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1246 1247 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1248 /// because the type is a RecordType or because it is the injected-class-name 1249 /// type of a class template or class template partial specialization. 1250 CXXRecordDecl *getAsCXXRecordDecl() const; 1251 1252 // Member-template getAs<specific type>'. Look through sugar for 1253 // an instance of <specific type>. This scheme will eventually 1254 // replace the specific getAsXXXX methods above. 1255 // 1256 // There are some specializations of this member template listed 1257 // immediately following this class. 1258 template <typename T> const T *getAs() const; 1259 1260 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1261 /// element type of the array, potentially with type qualifiers missing. 1262 /// This method should never be used when type qualifiers are meaningful. 1263 const Type *getArrayElementTypeNoTypeQual() const; 1264 1265 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1266 /// pointer, this returns the respective pointee. 1267 QualType getPointeeType() const; 1268 1269 /// getUnqualifiedDesugaredType() - Return the specified type with 1270 /// any "sugar" removed from the type, removing any typedefs, 1271 /// typeofs, etc., as well as any qualifiers. 1272 const Type *getUnqualifiedDesugaredType() const; 1273 1274 /// More type predicates useful for type checking/promotion 1275 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1276 1277 /// isSignedIntegerType - Return true if this is an integer type that is 1278 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1279 /// an enum decl which has a signed representation, or a vector of signed 1280 /// integer element type. 1281 bool isSignedIntegerType() const; 1282 1283 /// isUnsignedIntegerType - Return true if this is an integer type that is 1284 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1285 /// decl which has an unsigned representation, or a vector of unsigned integer 1286 /// element type. 1287 bool isUnsignedIntegerType() const; 1288 1289 /// isConstantSizeType - Return true if this is not a variable sized type, 1290 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1291 /// incomplete types. 1292 bool isConstantSizeType() const; 1293 1294 /// isSpecifierType - Returns true if this type can be represented by some 1295 /// set of type specifiers. 1296 bool isSpecifierType() const; 1297 1298 /// \brief Determine the linkage of this type. 1299 Linkage getLinkage() const; 1300 1301 /// \brief Determine the visibility of this type. 1302 Visibility getVisibility() const; 1303 1304 /// \brief Determine the linkage and visibility of this type. 1305 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1306 1307 /// \brief Note that the linkage is no longer known. 1308 void ClearLinkageCache(); 1309 1310 const char *getTypeClassName() const; 1311 1312 QualType getCanonicalTypeInternal() const { 1313 return CanonicalType; 1314 } 1315 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1316 void dump() const; 1317 static bool classof(const Type *) { return true; } 1318 1319 friend class ASTReader; 1320 friend class ASTWriter; 1321}; 1322 1323template <> inline const TypedefType *Type::getAs() const { 1324 return dyn_cast<TypedefType>(this); 1325} 1326 1327// We can do canonical leaf types faster, because we don't have to 1328// worry about preserving child type decoration. 1329#define TYPE(Class, Base) 1330#define LEAF_TYPE(Class) \ 1331template <> inline const Class##Type *Type::getAs() const { \ 1332 return dyn_cast<Class##Type>(CanonicalType); \ 1333} 1334#include "clang/AST/TypeNodes.def" 1335 1336 1337/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1338/// types are always canonical and have a literal name field. 1339class BuiltinType : public Type { 1340public: 1341 enum Kind { 1342 Void, 1343 1344 Bool, // This is bool and/or _Bool. 1345 Char_U, // This is 'char' for targets where char is unsigned. 1346 UChar, // This is explicitly qualified unsigned char. 1347 Char16, // This is 'char16_t' for C++. 1348 Char32, // This is 'char32_t' for C++. 1349 UShort, 1350 UInt, 1351 ULong, 1352 ULongLong, 1353 UInt128, // __uint128_t 1354 1355 Char_S, // This is 'char' for targets where char is signed. 1356 SChar, // This is explicitly qualified signed char. 1357 WChar, // This is 'wchar_t' for C++. 1358 Short, 1359 Int, 1360 Long, 1361 LongLong, 1362 Int128, // __int128_t 1363 1364 Float, Double, LongDouble, 1365 1366 NullPtr, // This is the type of C++0x 'nullptr'. 1367 1368 /// This represents the type of an expression whose type is 1369 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1370 /// appear in situations where the structure of the type is 1371 /// theoretically deducible. 1372 Dependent, 1373 1374 Overload, // This represents the type of an overloaded function declaration. 1375 1376 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1377 // that has not been deduced yet. 1378 1379 /// The primitive Objective C 'id' type. The type pointed to by the 1380 /// user-visible 'id' type. Only ever shows up in an AST as the base 1381 /// type of an ObjCObjectType. 1382 ObjCId, 1383 1384 /// The primitive Objective C 'Class' type. The type pointed to by the 1385 /// user-visible 'Class' type. Only ever shows up in an AST as the 1386 /// base type of an ObjCObjectType. 1387 ObjCClass, 1388 1389 ObjCSel // This represents the ObjC 'SEL' type. 1390 }; 1391 1392public: 1393 BuiltinType(Kind K) 1394 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1395 /*VariablyModified=*/false, 1396 /*Unexpanded paramter pack=*/false) { 1397 BuiltinTypeBits.Kind = K; 1398 } 1399 1400 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1401 const char *getName(const LangOptions &LO) const; 1402 1403 bool isSugared() const { return false; } 1404 QualType desugar() const { return QualType(this, 0); } 1405 1406 bool isInteger() const { 1407 return getKind() >= Bool && getKind() <= Int128; 1408 } 1409 1410 bool isSignedInteger() const { 1411 return getKind() >= Char_S && getKind() <= Int128; 1412 } 1413 1414 bool isUnsignedInteger() const { 1415 return getKind() >= Bool && getKind() <= UInt128; 1416 } 1417 1418 bool isFloatingPoint() const { 1419 return getKind() >= Float && getKind() <= LongDouble; 1420 } 1421 1422 /// Determines whether this type is a "forbidden" placeholder type, 1423 /// i.e. a type which cannot appear in arbitrary positions in a 1424 /// fully-formed expression. 1425 bool isPlaceholderType() const { 1426 return getKind() == Overload || 1427 getKind() == UndeducedAuto; 1428 } 1429 1430 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1431 static bool classof(const BuiltinType *) { return true; } 1432}; 1433 1434/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1435/// types (_Complex float etc) as well as the GCC integer complex extensions. 1436/// 1437class ComplexType : public Type, public llvm::FoldingSetNode { 1438 QualType ElementType; 1439 ComplexType(QualType Element, QualType CanonicalPtr) : 1440 Type(Complex, CanonicalPtr, Element->isDependentType(), 1441 Element->isVariablyModifiedType(), 1442 Element->containsUnexpandedParameterPack()), 1443 ElementType(Element) { 1444 } 1445 friend class ASTContext; // ASTContext creates these. 1446 1447public: 1448 QualType getElementType() const { return ElementType; } 1449 1450 bool isSugared() const { return false; } 1451 QualType desugar() const { return QualType(this, 0); } 1452 1453 void Profile(llvm::FoldingSetNodeID &ID) { 1454 Profile(ID, getElementType()); 1455 } 1456 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1457 ID.AddPointer(Element.getAsOpaquePtr()); 1458 } 1459 1460 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1461 static bool classof(const ComplexType *) { return true; } 1462}; 1463 1464/// ParenType - Sugar for parentheses used when specifying types. 1465/// 1466class ParenType : public Type, public llvm::FoldingSetNode { 1467 QualType Inner; 1468 1469 ParenType(QualType InnerType, QualType CanonType) : 1470 Type(Paren, CanonType, InnerType->isDependentType(), 1471 InnerType->isVariablyModifiedType(), 1472 InnerType->containsUnexpandedParameterPack()), 1473 Inner(InnerType) { 1474 } 1475 friend class ASTContext; // ASTContext creates these. 1476 1477public: 1478 1479 QualType getInnerType() const { return Inner; } 1480 1481 bool isSugared() const { return true; } 1482 QualType desugar() const { return getInnerType(); } 1483 1484 void Profile(llvm::FoldingSetNodeID &ID) { 1485 Profile(ID, getInnerType()); 1486 } 1487 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1488 Inner.Profile(ID); 1489 } 1490 1491 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1492 static bool classof(const ParenType *) { return true; } 1493}; 1494 1495/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1496/// 1497class PointerType : public Type, public llvm::FoldingSetNode { 1498 QualType PointeeType; 1499 1500 PointerType(QualType Pointee, QualType CanonicalPtr) : 1501 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1502 Pointee->isVariablyModifiedType(), 1503 Pointee->containsUnexpandedParameterPack()), 1504 PointeeType(Pointee) { 1505 } 1506 friend class ASTContext; // ASTContext creates these. 1507 1508public: 1509 1510 QualType getPointeeType() const { return PointeeType; } 1511 1512 bool isSugared() const { return false; } 1513 QualType desugar() const { return QualType(this, 0); } 1514 1515 void Profile(llvm::FoldingSetNodeID &ID) { 1516 Profile(ID, getPointeeType()); 1517 } 1518 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1519 ID.AddPointer(Pointee.getAsOpaquePtr()); 1520 } 1521 1522 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1523 static bool classof(const PointerType *) { return true; } 1524}; 1525 1526/// BlockPointerType - pointer to a block type. 1527/// This type is to represent types syntactically represented as 1528/// "void (^)(int)", etc. Pointee is required to always be a function type. 1529/// 1530class BlockPointerType : public Type, public llvm::FoldingSetNode { 1531 QualType PointeeType; // Block is some kind of pointer type 1532 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1533 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1534 Pointee->isVariablyModifiedType(), 1535 Pointee->containsUnexpandedParameterPack()), 1536 PointeeType(Pointee) { 1537 } 1538 friend class ASTContext; // ASTContext creates these. 1539 1540public: 1541 1542 // Get the pointee type. Pointee is required to always be a function type. 1543 QualType getPointeeType() const { return PointeeType; } 1544 1545 bool isSugared() const { return false; } 1546 QualType desugar() const { return QualType(this, 0); } 1547 1548 void Profile(llvm::FoldingSetNodeID &ID) { 1549 Profile(ID, getPointeeType()); 1550 } 1551 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1552 ID.AddPointer(Pointee.getAsOpaquePtr()); 1553 } 1554 1555 static bool classof(const Type *T) { 1556 return T->getTypeClass() == BlockPointer; 1557 } 1558 static bool classof(const BlockPointerType *) { return true; } 1559}; 1560 1561/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1562/// 1563class ReferenceType : public Type, public llvm::FoldingSetNode { 1564 QualType PointeeType; 1565 1566protected: 1567 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1568 bool SpelledAsLValue) : 1569 Type(tc, CanonicalRef, Referencee->isDependentType(), 1570 Referencee->isVariablyModifiedType(), 1571 Referencee->containsUnexpandedParameterPack()), 1572 PointeeType(Referencee) 1573 { 1574 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1575 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1576 } 1577 1578public: 1579 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1580 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1581 1582 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1583 QualType getPointeeType() const { 1584 // FIXME: this might strip inner qualifiers; okay? 1585 const ReferenceType *T = this; 1586 while (T->isInnerRef()) 1587 T = T->PointeeType->getAs<ReferenceType>(); 1588 return T->PointeeType; 1589 } 1590 1591 void Profile(llvm::FoldingSetNodeID &ID) { 1592 Profile(ID, PointeeType, isSpelledAsLValue()); 1593 } 1594 static void Profile(llvm::FoldingSetNodeID &ID, 1595 QualType Referencee, 1596 bool SpelledAsLValue) { 1597 ID.AddPointer(Referencee.getAsOpaquePtr()); 1598 ID.AddBoolean(SpelledAsLValue); 1599 } 1600 1601 static bool classof(const Type *T) { 1602 return T->getTypeClass() == LValueReference || 1603 T->getTypeClass() == RValueReference; 1604 } 1605 static bool classof(const ReferenceType *) { return true; } 1606}; 1607 1608/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1609/// 1610class LValueReferenceType : public ReferenceType { 1611 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1612 bool SpelledAsLValue) : 1613 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1614 {} 1615 friend class ASTContext; // ASTContext creates these 1616public: 1617 bool isSugared() const { return false; } 1618 QualType desugar() const { return QualType(this, 0); } 1619 1620 static bool classof(const Type *T) { 1621 return T->getTypeClass() == LValueReference; 1622 } 1623 static bool classof(const LValueReferenceType *) { return true; } 1624}; 1625 1626/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1627/// 1628class RValueReferenceType : public ReferenceType { 1629 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1630 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1631 } 1632 friend class ASTContext; // ASTContext creates these 1633public: 1634 bool isSugared() const { return false; } 1635 QualType desugar() const { return QualType(this, 0); } 1636 1637 static bool classof(const Type *T) { 1638 return T->getTypeClass() == RValueReference; 1639 } 1640 static bool classof(const RValueReferenceType *) { return true; } 1641}; 1642 1643/// MemberPointerType - C++ 8.3.3 - Pointers to members 1644/// 1645class MemberPointerType : public Type, public llvm::FoldingSetNode { 1646 QualType PointeeType; 1647 /// The class of which the pointee is a member. Must ultimately be a 1648 /// RecordType, but could be a typedef or a template parameter too. 1649 const Type *Class; 1650 1651 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1652 Type(MemberPointer, CanonicalPtr, 1653 Cls->isDependentType() || Pointee->isDependentType(), 1654 Pointee->isVariablyModifiedType(), 1655 (Cls->containsUnexpandedParameterPack() || 1656 Pointee->containsUnexpandedParameterPack())), 1657 PointeeType(Pointee), Class(Cls) { 1658 } 1659 friend class ASTContext; // ASTContext creates these. 1660 1661public: 1662 QualType getPointeeType() const { return PointeeType; } 1663 1664 /// Returns true if the member type (i.e. the pointee type) is a 1665 /// function type rather than a data-member type. 1666 bool isMemberFunctionPointer() const { 1667 return PointeeType->isFunctionProtoType(); 1668 } 1669 1670 /// Returns true if the member type (i.e. the pointee type) is a 1671 /// data type rather than a function type. 1672 bool isMemberDataPointer() const { 1673 return !PointeeType->isFunctionProtoType(); 1674 } 1675 1676 const Type *getClass() const { return Class; } 1677 1678 bool isSugared() const { return false; } 1679 QualType desugar() const { return QualType(this, 0); } 1680 1681 void Profile(llvm::FoldingSetNodeID &ID) { 1682 Profile(ID, getPointeeType(), getClass()); 1683 } 1684 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1685 const Type *Class) { 1686 ID.AddPointer(Pointee.getAsOpaquePtr()); 1687 ID.AddPointer(Class); 1688 } 1689 1690 static bool classof(const Type *T) { 1691 return T->getTypeClass() == MemberPointer; 1692 } 1693 static bool classof(const MemberPointerType *) { return true; } 1694}; 1695 1696/// ArrayType - C99 6.7.5.2 - Array Declarators. 1697/// 1698class ArrayType : public Type, public llvm::FoldingSetNode { 1699public: 1700 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1701 /// an array with a static size (e.g. int X[static 4]), or an array 1702 /// with a star size (e.g. int X[*]). 1703 /// 'static' is only allowed on function parameters. 1704 enum ArraySizeModifier { 1705 Normal, Static, Star 1706 }; 1707private: 1708 /// ElementType - The element type of the array. 1709 QualType ElementType; 1710 1711protected: 1712 // C++ [temp.dep.type]p1: 1713 // A type is dependent if it is... 1714 // - an array type constructed from any dependent type or whose 1715 // size is specified by a constant expression that is 1716 // value-dependent, 1717 ArrayType(TypeClass tc, QualType et, QualType can, 1718 ArraySizeModifier sm, unsigned tq, 1719 bool ContainsUnexpandedParameterPack) 1720 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1721 (tc == VariableArray || et->isVariablyModifiedType()), 1722 ContainsUnexpandedParameterPack), 1723 ElementType(et) { 1724 ArrayTypeBits.IndexTypeQuals = tq; 1725 ArrayTypeBits.SizeModifier = sm; 1726 } 1727 1728 friend class ASTContext; // ASTContext creates these. 1729 1730public: 1731 QualType getElementType() const { return ElementType; } 1732 ArraySizeModifier getSizeModifier() const { 1733 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1734 } 1735 Qualifiers getIndexTypeQualifiers() const { 1736 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1737 } 1738 unsigned getIndexTypeCVRQualifiers() const { 1739 return ArrayTypeBits.IndexTypeQuals; 1740 } 1741 1742 static bool classof(const Type *T) { 1743 return T->getTypeClass() == ConstantArray || 1744 T->getTypeClass() == VariableArray || 1745 T->getTypeClass() == IncompleteArray || 1746 T->getTypeClass() == DependentSizedArray; 1747 } 1748 static bool classof(const ArrayType *) { return true; } 1749}; 1750 1751/// ConstantArrayType - This class represents the canonical version of 1752/// C arrays with a specified constant size. For example, the canonical 1753/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1754/// type is 'int' and the size is 404. 1755class ConstantArrayType : public ArrayType { 1756 llvm::APInt Size; // Allows us to unique the type. 1757 1758 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1759 ArraySizeModifier sm, unsigned tq) 1760 : ArrayType(ConstantArray, et, can, sm, tq, 1761 et->containsUnexpandedParameterPack()), 1762 Size(size) {} 1763protected: 1764 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1765 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1766 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1767 Size(size) {} 1768 friend class ASTContext; // ASTContext creates these. 1769public: 1770 const llvm::APInt &getSize() const { return Size; } 1771 bool isSugared() const { return false; } 1772 QualType desugar() const { return QualType(this, 0); } 1773 1774 1775 /// \brief Determine the number of bits required to address a member of 1776 // an array with the given element type and number of elements. 1777 static unsigned getNumAddressingBits(ASTContext &Context, 1778 QualType ElementType, 1779 const llvm::APInt &NumElements); 1780 1781 /// \brief Determine the maximum number of active bits that an array's size 1782 /// can require, which limits the maximum size of the array. 1783 static unsigned getMaxSizeBits(ASTContext &Context); 1784 1785 void Profile(llvm::FoldingSetNodeID &ID) { 1786 Profile(ID, getElementType(), getSize(), 1787 getSizeModifier(), getIndexTypeCVRQualifiers()); 1788 } 1789 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1790 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1791 unsigned TypeQuals) { 1792 ID.AddPointer(ET.getAsOpaquePtr()); 1793 ID.AddInteger(ArraySize.getZExtValue()); 1794 ID.AddInteger(SizeMod); 1795 ID.AddInteger(TypeQuals); 1796 } 1797 static bool classof(const Type *T) { 1798 return T->getTypeClass() == ConstantArray; 1799 } 1800 static bool classof(const ConstantArrayType *) { return true; } 1801}; 1802 1803/// IncompleteArrayType - This class represents C arrays with an unspecified 1804/// size. For example 'int A[]' has an IncompleteArrayType where the element 1805/// type is 'int' and the size is unspecified. 1806class IncompleteArrayType : public ArrayType { 1807 1808 IncompleteArrayType(QualType et, QualType can, 1809 ArraySizeModifier sm, unsigned tq) 1810 : ArrayType(IncompleteArray, et, can, sm, tq, 1811 et->containsUnexpandedParameterPack()) {} 1812 friend class ASTContext; // ASTContext creates these. 1813public: 1814 bool isSugared() const { return false; } 1815 QualType desugar() const { return QualType(this, 0); } 1816 1817 static bool classof(const Type *T) { 1818 return T->getTypeClass() == IncompleteArray; 1819 } 1820 static bool classof(const IncompleteArrayType *) { return true; } 1821 1822 friend class StmtIteratorBase; 1823 1824 void Profile(llvm::FoldingSetNodeID &ID) { 1825 Profile(ID, getElementType(), getSizeModifier(), 1826 getIndexTypeCVRQualifiers()); 1827 } 1828 1829 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1830 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1831 ID.AddPointer(ET.getAsOpaquePtr()); 1832 ID.AddInteger(SizeMod); 1833 ID.AddInteger(TypeQuals); 1834 } 1835}; 1836 1837/// VariableArrayType - This class represents C arrays with a specified size 1838/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1839/// Since the size expression is an arbitrary expression, we store it as such. 1840/// 1841/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1842/// should not be: two lexically equivalent variable array types could mean 1843/// different things, for example, these variables do not have the same type 1844/// dynamically: 1845/// 1846/// void foo(int x) { 1847/// int Y[x]; 1848/// ++x; 1849/// int Z[x]; 1850/// } 1851/// 1852class VariableArrayType : public ArrayType { 1853 /// SizeExpr - An assignment expression. VLA's are only permitted within 1854 /// a function block. 1855 Stmt *SizeExpr; 1856 /// Brackets - The left and right array brackets. 1857 SourceRange Brackets; 1858 1859 VariableArrayType(QualType et, QualType can, Expr *e, 1860 ArraySizeModifier sm, unsigned tq, 1861 SourceRange brackets) 1862 : ArrayType(VariableArray, et, can, sm, tq, 1863 et->containsUnexpandedParameterPack()), 1864 SizeExpr((Stmt*) e), Brackets(brackets) {} 1865 friend class ASTContext; // ASTContext creates these. 1866 1867public: 1868 Expr *getSizeExpr() const { 1869 // We use C-style casts instead of cast<> here because we do not wish 1870 // to have a dependency of Type.h on Stmt.h/Expr.h. 1871 return (Expr*) SizeExpr; 1872 } 1873 SourceRange getBracketsRange() const { return Brackets; } 1874 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1875 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1876 1877 bool isSugared() const { return false; } 1878 QualType desugar() const { return QualType(this, 0); } 1879 1880 static bool classof(const Type *T) { 1881 return T->getTypeClass() == VariableArray; 1882 } 1883 static bool classof(const VariableArrayType *) { return true; } 1884 1885 friend class StmtIteratorBase; 1886 1887 void Profile(llvm::FoldingSetNodeID &ID) { 1888 assert(0 && "Cannnot unique VariableArrayTypes."); 1889 } 1890}; 1891 1892/// DependentSizedArrayType - This type represents an array type in 1893/// C++ whose size is a value-dependent expression. For example: 1894/// 1895/// \code 1896/// template<typename T, int Size> 1897/// class array { 1898/// T data[Size]; 1899/// }; 1900/// \endcode 1901/// 1902/// For these types, we won't actually know what the array bound is 1903/// until template instantiation occurs, at which point this will 1904/// become either a ConstantArrayType or a VariableArrayType. 1905class DependentSizedArrayType : public ArrayType { 1906 ASTContext &Context; 1907 1908 /// \brief An assignment expression that will instantiate to the 1909 /// size of the array. 1910 /// 1911 /// The expression itself might be NULL, in which case the array 1912 /// type will have its size deduced from an initializer. 1913 Stmt *SizeExpr; 1914 1915 /// Brackets - The left and right array brackets. 1916 SourceRange Brackets; 1917 1918 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1919 Expr *e, ArraySizeModifier sm, unsigned tq, 1920 SourceRange brackets); 1921 1922 friend class ASTContext; // ASTContext creates these. 1923 1924public: 1925 Expr *getSizeExpr() const { 1926 // We use C-style casts instead of cast<> here because we do not wish 1927 // to have a dependency of Type.h on Stmt.h/Expr.h. 1928 return (Expr*) SizeExpr; 1929 } 1930 SourceRange getBracketsRange() const { return Brackets; } 1931 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1932 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1933 1934 bool isSugared() const { return false; } 1935 QualType desugar() const { return QualType(this, 0); } 1936 1937 static bool classof(const Type *T) { 1938 return T->getTypeClass() == DependentSizedArray; 1939 } 1940 static bool classof(const DependentSizedArrayType *) { return true; } 1941 1942 friend class StmtIteratorBase; 1943 1944 1945 void Profile(llvm::FoldingSetNodeID &ID) { 1946 Profile(ID, Context, getElementType(), 1947 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1948 } 1949 1950 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1951 QualType ET, ArraySizeModifier SizeMod, 1952 unsigned TypeQuals, Expr *E); 1953}; 1954 1955/// DependentSizedExtVectorType - This type represent an extended vector type 1956/// where either the type or size is dependent. For example: 1957/// @code 1958/// template<typename T, int Size> 1959/// class vector { 1960/// typedef T __attribute__((ext_vector_type(Size))) type; 1961/// } 1962/// @endcode 1963class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1964 ASTContext &Context; 1965 Expr *SizeExpr; 1966 /// ElementType - The element type of the array. 1967 QualType ElementType; 1968 SourceLocation loc; 1969 1970 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1971 QualType can, Expr *SizeExpr, SourceLocation loc); 1972 1973 friend class ASTContext; 1974 1975public: 1976 Expr *getSizeExpr() const { return SizeExpr; } 1977 QualType getElementType() const { return ElementType; } 1978 SourceLocation getAttributeLoc() const { return loc; } 1979 1980 bool isSugared() const { return false; } 1981 QualType desugar() const { return QualType(this, 0); } 1982 1983 static bool classof(const Type *T) { 1984 return T->getTypeClass() == DependentSizedExtVector; 1985 } 1986 static bool classof(const DependentSizedExtVectorType *) { return true; } 1987 1988 void Profile(llvm::FoldingSetNodeID &ID) { 1989 Profile(ID, Context, getElementType(), getSizeExpr()); 1990 } 1991 1992 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1993 QualType ElementType, Expr *SizeExpr); 1994}; 1995 1996 1997/// VectorType - GCC generic vector type. This type is created using 1998/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1999/// bytes; or from an Altivec __vector or vector declaration. 2000/// Since the constructor takes the number of vector elements, the 2001/// client is responsible for converting the size into the number of elements. 2002class VectorType : public Type, public llvm::FoldingSetNode { 2003public: 2004 enum VectorKind { 2005 GenericVector, // not a target-specific vector type 2006 AltiVecVector, // is AltiVec vector 2007 AltiVecPixel, // is AltiVec 'vector Pixel' 2008 AltiVecBool, // is AltiVec 'vector bool ...' 2009 NeonVector, // is ARM Neon vector 2010 NeonPolyVector // is ARM Neon polynomial vector 2011 }; 2012protected: 2013 /// ElementType - The element type of the vector. 2014 QualType ElementType; 2015 2016 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2017 VectorKind vecKind); 2018 2019 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2020 QualType canonType, VectorKind vecKind); 2021 2022 friend class ASTContext; // ASTContext creates these. 2023 2024public: 2025 2026 QualType getElementType() const { return ElementType; } 2027 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2028 2029 bool isSugared() const { return false; } 2030 QualType desugar() const { return QualType(this, 0); } 2031 2032 VectorKind getVectorKind() const { 2033 return VectorKind(VectorTypeBits.VecKind); 2034 } 2035 2036 void Profile(llvm::FoldingSetNodeID &ID) { 2037 Profile(ID, getElementType(), getNumElements(), 2038 getTypeClass(), getVectorKind()); 2039 } 2040 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2041 unsigned NumElements, TypeClass TypeClass, 2042 VectorKind VecKind) { 2043 ID.AddPointer(ElementType.getAsOpaquePtr()); 2044 ID.AddInteger(NumElements); 2045 ID.AddInteger(TypeClass); 2046 ID.AddInteger(VecKind); 2047 } 2048 2049 static bool classof(const Type *T) { 2050 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2051 } 2052 static bool classof(const VectorType *) { return true; } 2053}; 2054 2055/// ExtVectorType - Extended vector type. This type is created using 2056/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2057/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2058/// class enables syntactic extensions, like Vector Components for accessing 2059/// points, colors, and textures (modeled after OpenGL Shading Language). 2060class ExtVectorType : public VectorType { 2061 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2062 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2063 friend class ASTContext; // ASTContext creates these. 2064public: 2065 static int getPointAccessorIdx(char c) { 2066 switch (c) { 2067 default: return -1; 2068 case 'x': return 0; 2069 case 'y': return 1; 2070 case 'z': return 2; 2071 case 'w': return 3; 2072 } 2073 } 2074 static int getNumericAccessorIdx(char c) { 2075 switch (c) { 2076 default: return -1; 2077 case '0': return 0; 2078 case '1': return 1; 2079 case '2': return 2; 2080 case '3': return 3; 2081 case '4': return 4; 2082 case '5': return 5; 2083 case '6': return 6; 2084 case '7': return 7; 2085 case '8': return 8; 2086 case '9': return 9; 2087 case 'A': 2088 case 'a': return 10; 2089 case 'B': 2090 case 'b': return 11; 2091 case 'C': 2092 case 'c': return 12; 2093 case 'D': 2094 case 'd': return 13; 2095 case 'E': 2096 case 'e': return 14; 2097 case 'F': 2098 case 'f': return 15; 2099 } 2100 } 2101 2102 static int getAccessorIdx(char c) { 2103 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2104 return getNumericAccessorIdx(c); 2105 } 2106 2107 bool isAccessorWithinNumElements(char c) const { 2108 if (int idx = getAccessorIdx(c)+1) 2109 return unsigned(idx-1) < getNumElements(); 2110 return false; 2111 } 2112 bool isSugared() const { return false; } 2113 QualType desugar() const { return QualType(this, 0); } 2114 2115 static bool classof(const Type *T) { 2116 return T->getTypeClass() == ExtVector; 2117 } 2118 static bool classof(const ExtVectorType *) { return true; } 2119}; 2120 2121/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2122/// class of FunctionNoProtoType and FunctionProtoType. 2123/// 2124class FunctionType : public Type { 2125 // The type returned by the function. 2126 QualType ResultType; 2127 2128 public: 2129 /// ExtInfo - A class which abstracts out some details necessary for 2130 /// making a call. 2131 /// 2132 /// It is not actually used directly for storing this information in 2133 /// a FunctionType, although FunctionType does currently use the 2134 /// same bit-pattern. 2135 /// 2136 // If you add a field (say Foo), other than the obvious places (both, 2137 // constructors, compile failures), what you need to update is 2138 // * Operator== 2139 // * getFoo 2140 // * withFoo 2141 // * functionType. Add Foo, getFoo. 2142 // * ASTContext::getFooType 2143 // * ASTContext::mergeFunctionTypes 2144 // * FunctionNoProtoType::Profile 2145 // * FunctionProtoType::Profile 2146 // * TypePrinter::PrintFunctionProto 2147 // * AST read and write 2148 // * Codegen 2149 class ExtInfo { 2150 // Feel free to rearrange or add bits, but if you go over 8, 2151 // you'll need to adjust both the Bits field below and 2152 // Type::FunctionTypeBitfields. 2153 2154 // | CC |noreturn|regparm 2155 // |0 .. 2| 3 |4 .. 6 2156 enum { CallConvMask = 0x7 }; 2157 enum { NoReturnMask = 0x8 }; 2158 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2159 RegParmOffset = 4 }; 2160 2161 unsigned char Bits; 2162 2163 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2164 2165 friend class FunctionType; 2166 2167 public: 2168 // Constructor with no defaults. Use this when you know that you 2169 // have all the elements (when reading an AST file for example). 2170 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2171 Bits = ((unsigned) cc) | 2172 (noReturn ? NoReturnMask : 0) | 2173 (regParm << RegParmOffset); 2174 } 2175 2176 // Constructor with all defaults. Use when for example creating a 2177 // function know to use defaults. 2178 ExtInfo() : Bits(0) {} 2179 2180 bool getNoReturn() const { return Bits & NoReturnMask; } 2181 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2182 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2183 2184 bool operator==(ExtInfo Other) const { 2185 return Bits == Other.Bits; 2186 } 2187 bool operator!=(ExtInfo Other) const { 2188 return Bits != Other.Bits; 2189 } 2190 2191 // Note that we don't have setters. That is by design, use 2192 // the following with methods instead of mutating these objects. 2193 2194 ExtInfo withNoReturn(bool noReturn) const { 2195 if (noReturn) 2196 return ExtInfo(Bits | NoReturnMask); 2197 else 2198 return ExtInfo(Bits & ~NoReturnMask); 2199 } 2200 2201 ExtInfo withRegParm(unsigned RegParm) const { 2202 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2203 } 2204 2205 ExtInfo withCallingConv(CallingConv cc) const { 2206 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2207 } 2208 2209 void Profile(llvm::FoldingSetNodeID &ID) const { 2210 ID.AddInteger(Bits); 2211 } 2212 }; 2213 2214protected: 2215 FunctionType(TypeClass tc, QualType res, bool variadic, 2216 unsigned typeQuals, QualType Canonical, bool Dependent, 2217 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2218 ExtInfo Info) 2219 : Type(tc, Canonical, Dependent, VariablyModified, 2220 ContainsUnexpandedParameterPack), 2221 ResultType(res) { 2222 FunctionTypeBits.ExtInfo = Info.Bits; 2223 FunctionTypeBits.Variadic = variadic; 2224 FunctionTypeBits.TypeQuals = typeQuals; 2225 } 2226 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2227 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2228public: 2229 2230 QualType getResultType() const { return ResultType; } 2231 2232 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2233 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2234 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2235 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2236 2237 /// \brief Determine the type of an expression that calls a function of 2238 /// this type. 2239 QualType getCallResultType(ASTContext &Context) const { 2240 return getResultType().getNonLValueExprType(Context); 2241 } 2242 2243 static llvm::StringRef getNameForCallConv(CallingConv CC); 2244 2245 static bool classof(const Type *T) { 2246 return T->getTypeClass() == FunctionNoProto || 2247 T->getTypeClass() == FunctionProto; 2248 } 2249 static bool classof(const FunctionType *) { return true; } 2250}; 2251 2252/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2253/// no information available about its arguments. 2254class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2255 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2256 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2257 /*Dependent=*/false, Result->isVariablyModifiedType(), 2258 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2259 2260 friend class ASTContext; // ASTContext creates these. 2261 2262public: 2263 // No additional state past what FunctionType provides. 2264 2265 bool isSugared() const { return false; } 2266 QualType desugar() const { return QualType(this, 0); } 2267 2268 void Profile(llvm::FoldingSetNodeID &ID) { 2269 Profile(ID, getResultType(), getExtInfo()); 2270 } 2271 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2272 ExtInfo Info) { 2273 Info.Profile(ID); 2274 ID.AddPointer(ResultType.getAsOpaquePtr()); 2275 } 2276 2277 static bool classof(const Type *T) { 2278 return T->getTypeClass() == FunctionNoProto; 2279 } 2280 static bool classof(const FunctionNoProtoType *) { return true; } 2281}; 2282 2283/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2284/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2285/// arguments, not as having a single void argument. Such a type can have an 2286/// exception specification, but this specification is not part of the canonical 2287/// type. 2288class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2289public: 2290 /// ExtProtoInfo - Extra information about a function prototype. 2291 struct ExtProtoInfo { 2292 ExtProtoInfo() : 2293 Variadic(false), HasExceptionSpec(false), HasAnyExceptionSpec(false), 2294 TypeQuals(0), NumExceptions(0), Exceptions(0) {} 2295 2296 FunctionType::ExtInfo ExtInfo; 2297 bool Variadic; 2298 bool HasExceptionSpec; 2299 bool HasAnyExceptionSpec; 2300 unsigned char TypeQuals; 2301 unsigned NumExceptions; 2302 const QualType *Exceptions; 2303 }; 2304 2305private: 2306 /// \brief Determine whether there are any argument types that 2307 /// contain an unexpanded parameter pack. 2308 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2309 unsigned numArgs) { 2310 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2311 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2312 return true; 2313 2314 return false; 2315 } 2316 2317 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2318 QualType canonical, const ExtProtoInfo &epi); 2319 2320 /// NumArgs - The number of arguments this function has, not counting '...'. 2321 unsigned NumArgs : 20; 2322 2323 /// NumExceptions - The number of types in the exception spec, if any. 2324 unsigned NumExceptions : 10; 2325 2326 /// HasExceptionSpec - Whether this function has an exception spec at all. 2327 unsigned HasExceptionSpec : 1; 2328 2329 /// HasAnyExceptionSpec - Whether this function has a throw(...) spec. 2330 unsigned HasAnyExceptionSpec : 1; 2331 2332 /// ArgInfo - There is an variable size array after the class in memory that 2333 /// holds the argument types. 2334 2335 /// Exceptions - There is another variable size array after ArgInfo that 2336 /// holds the exception types. 2337 2338 friend class ASTContext; // ASTContext creates these. 2339 2340public: 2341 unsigned getNumArgs() const { return NumArgs; } 2342 QualType getArgType(unsigned i) const { 2343 assert(i < NumArgs && "Invalid argument number!"); 2344 return arg_type_begin()[i]; 2345 } 2346 2347 ExtProtoInfo getExtProtoInfo() const { 2348 ExtProtoInfo EPI; 2349 EPI.ExtInfo = getExtInfo(); 2350 EPI.Variadic = isVariadic(); 2351 EPI.HasExceptionSpec = hasExceptionSpec(); 2352 EPI.HasAnyExceptionSpec = hasAnyExceptionSpec(); 2353 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2354 EPI.NumExceptions = NumExceptions; 2355 EPI.Exceptions = exception_begin(); 2356 return EPI; 2357 } 2358 2359 bool hasExceptionSpec() const { return HasExceptionSpec; } 2360 bool hasAnyExceptionSpec() const { return HasAnyExceptionSpec; } 2361 unsigned getNumExceptions() const { return NumExceptions; } 2362 QualType getExceptionType(unsigned i) const { 2363 assert(i < NumExceptions && "Invalid exception number!"); 2364 return exception_begin()[i]; 2365 } 2366 bool hasEmptyExceptionSpec() const { 2367 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2368 getNumExceptions() == 0; 2369 } 2370 2371 using FunctionType::isVariadic; 2372 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2373 2374 typedef const QualType *arg_type_iterator; 2375 arg_type_iterator arg_type_begin() const { 2376 return reinterpret_cast<const QualType *>(this+1); 2377 } 2378 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2379 2380 typedef const QualType *exception_iterator; 2381 exception_iterator exception_begin() const { 2382 // exceptions begin where arguments end 2383 return arg_type_end(); 2384 } 2385 exception_iterator exception_end() const { 2386 return exception_begin() + NumExceptions; 2387 } 2388 2389 bool isSugared() const { return false; } 2390 QualType desugar() const { return QualType(this, 0); } 2391 2392 static bool classof(const Type *T) { 2393 return T->getTypeClass() == FunctionProto; 2394 } 2395 static bool classof(const FunctionProtoType *) { return true; } 2396 2397 void Profile(llvm::FoldingSetNodeID &ID); 2398 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2399 arg_type_iterator ArgTys, unsigned NumArgs, 2400 const ExtProtoInfo &EPI); 2401}; 2402 2403 2404/// \brief Represents the dependent type named by a dependently-scoped 2405/// typename using declaration, e.g. 2406/// using typename Base<T>::foo; 2407/// Template instantiation turns these into the underlying type. 2408class UnresolvedUsingType : public Type { 2409 UnresolvedUsingTypenameDecl *Decl; 2410 2411 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2412 : Type(UnresolvedUsing, QualType(), true, false, 2413 /*ContainsUnexpandedParameterPack=*/false), 2414 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2415 friend class ASTContext; // ASTContext creates these. 2416public: 2417 2418 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2419 2420 bool isSugared() const { return false; } 2421 QualType desugar() const { return QualType(this, 0); } 2422 2423 static bool classof(const Type *T) { 2424 return T->getTypeClass() == UnresolvedUsing; 2425 } 2426 static bool classof(const UnresolvedUsingType *) { return true; } 2427 2428 void Profile(llvm::FoldingSetNodeID &ID) { 2429 return Profile(ID, Decl); 2430 } 2431 static void Profile(llvm::FoldingSetNodeID &ID, 2432 UnresolvedUsingTypenameDecl *D) { 2433 ID.AddPointer(D); 2434 } 2435}; 2436 2437 2438class TypedefType : public Type { 2439 TypedefDecl *Decl; 2440protected: 2441 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2442 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2443 /*ContainsUnexpandedParameterPack=*/false), 2444 Decl(const_cast<TypedefDecl*>(D)) { 2445 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2446 } 2447 friend class ASTContext; // ASTContext creates these. 2448public: 2449 2450 TypedefDecl *getDecl() const { return Decl; } 2451 2452 bool isSugared() const { return true; } 2453 QualType desugar() const; 2454 2455 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2456 static bool classof(const TypedefType *) { return true; } 2457}; 2458 2459/// TypeOfExprType (GCC extension). 2460class TypeOfExprType : public Type { 2461 Expr *TOExpr; 2462 2463protected: 2464 TypeOfExprType(Expr *E, QualType can = QualType()); 2465 friend class ASTContext; // ASTContext creates these. 2466public: 2467 Expr *getUnderlyingExpr() const { return TOExpr; } 2468 2469 /// \brief Remove a single level of sugar. 2470 QualType desugar() const; 2471 2472 /// \brief Returns whether this type directly provides sugar. 2473 bool isSugared() const { return true; } 2474 2475 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2476 static bool classof(const TypeOfExprType *) { return true; } 2477}; 2478 2479/// \brief Internal representation of canonical, dependent 2480/// typeof(expr) types. 2481/// 2482/// This class is used internally by the ASTContext to manage 2483/// canonical, dependent types, only. Clients will only see instances 2484/// of this class via TypeOfExprType nodes. 2485class DependentTypeOfExprType 2486 : public TypeOfExprType, public llvm::FoldingSetNode { 2487 ASTContext &Context; 2488 2489public: 2490 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2491 : TypeOfExprType(E), Context(Context) { } 2492 2493 bool isSugared() const { return false; } 2494 QualType desugar() const { return QualType(this, 0); } 2495 2496 void Profile(llvm::FoldingSetNodeID &ID) { 2497 Profile(ID, Context, getUnderlyingExpr()); 2498 } 2499 2500 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2501 Expr *E); 2502}; 2503 2504/// TypeOfType (GCC extension). 2505class TypeOfType : public Type { 2506 QualType TOType; 2507 TypeOfType(QualType T, QualType can) 2508 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2509 T->containsUnexpandedParameterPack()), 2510 TOType(T) { 2511 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2512 } 2513 friend class ASTContext; // ASTContext creates these. 2514public: 2515 QualType getUnderlyingType() const { return TOType; } 2516 2517 /// \brief Remove a single level of sugar. 2518 QualType desugar() const { return getUnderlyingType(); } 2519 2520 /// \brief Returns whether this type directly provides sugar. 2521 bool isSugared() const { return true; } 2522 2523 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2524 static bool classof(const TypeOfType *) { return true; } 2525}; 2526 2527/// DecltypeType (C++0x) 2528class DecltypeType : public Type { 2529 Expr *E; 2530 2531 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2532 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2533 // from it. 2534 QualType UnderlyingType; 2535 2536protected: 2537 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2538 friend class ASTContext; // ASTContext creates these. 2539public: 2540 Expr *getUnderlyingExpr() const { return E; } 2541 QualType getUnderlyingType() const { return UnderlyingType; } 2542 2543 /// \brief Remove a single level of sugar. 2544 QualType desugar() const { return getUnderlyingType(); } 2545 2546 /// \brief Returns whether this type directly provides sugar. 2547 bool isSugared() const { return !isDependentType(); } 2548 2549 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2550 static bool classof(const DecltypeType *) { return true; } 2551}; 2552 2553/// \brief Internal representation of canonical, dependent 2554/// decltype(expr) types. 2555/// 2556/// This class is used internally by the ASTContext to manage 2557/// canonical, dependent types, only. Clients will only see instances 2558/// of this class via DecltypeType nodes. 2559class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2560 ASTContext &Context; 2561 2562public: 2563 DependentDecltypeType(ASTContext &Context, Expr *E); 2564 2565 bool isSugared() const { return false; } 2566 QualType desugar() const { return QualType(this, 0); } 2567 2568 void Profile(llvm::FoldingSetNodeID &ID) { 2569 Profile(ID, Context, getUnderlyingExpr()); 2570 } 2571 2572 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2573 Expr *E); 2574}; 2575 2576class TagType : public Type { 2577 /// Stores the TagDecl associated with this type. The decl may point to any 2578 /// TagDecl that declares the entity. 2579 TagDecl * decl; 2580 2581protected: 2582 TagType(TypeClass TC, const TagDecl *D, QualType can); 2583 2584public: 2585 TagDecl *getDecl() const; 2586 2587 /// @brief Determines whether this type is in the process of being 2588 /// defined. 2589 bool isBeingDefined() const; 2590 2591 static bool classof(const Type *T) { 2592 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2593 } 2594 static bool classof(const TagType *) { return true; } 2595 static bool classof(const RecordType *) { return true; } 2596 static bool classof(const EnumType *) { return true; } 2597}; 2598 2599/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2600/// to detect TagType objects of structs/unions/classes. 2601class RecordType : public TagType { 2602protected: 2603 explicit RecordType(const RecordDecl *D) 2604 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2605 explicit RecordType(TypeClass TC, RecordDecl *D) 2606 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2607 friend class ASTContext; // ASTContext creates these. 2608public: 2609 2610 RecordDecl *getDecl() const { 2611 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2612 } 2613 2614 // FIXME: This predicate is a helper to QualType/Type. It needs to 2615 // recursively check all fields for const-ness. If any field is declared 2616 // const, it needs to return false. 2617 bool hasConstFields() const { return false; } 2618 2619 // FIXME: RecordType needs to check when it is created that all fields are in 2620 // the same address space, and return that. 2621 unsigned getAddressSpace() const { return 0; } 2622 2623 bool isSugared() const { return false; } 2624 QualType desugar() const { return QualType(this, 0); } 2625 2626 static bool classof(const TagType *T); 2627 static bool classof(const Type *T) { 2628 return isa<TagType>(T) && classof(cast<TagType>(T)); 2629 } 2630 static bool classof(const RecordType *) { return true; } 2631}; 2632 2633/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2634/// to detect TagType objects of enums. 2635class EnumType : public TagType { 2636 explicit EnumType(const EnumDecl *D) 2637 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2638 friend class ASTContext; // ASTContext creates these. 2639public: 2640 2641 EnumDecl *getDecl() const { 2642 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2643 } 2644 2645 bool isSugared() const { return false; } 2646 QualType desugar() const { return QualType(this, 0); } 2647 2648 static bool classof(const TagType *T); 2649 static bool classof(const Type *T) { 2650 return isa<TagType>(T) && classof(cast<TagType>(T)); 2651 } 2652 static bool classof(const EnumType *) { return true; } 2653}; 2654 2655class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2656 unsigned Depth : 15; 2657 unsigned ParameterPack : 1; 2658 unsigned Index : 16; 2659 IdentifierInfo *Name; 2660 2661 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2662 QualType Canon) 2663 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2664 /*VariablyModified=*/false, PP), 2665 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2666 2667 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2668 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2669 /*VariablyModified=*/false, PP), 2670 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2671 2672 friend class ASTContext; // ASTContext creates these 2673 2674public: 2675 unsigned getDepth() const { return Depth; } 2676 unsigned getIndex() const { return Index; } 2677 bool isParameterPack() const { return ParameterPack; } 2678 IdentifierInfo *getName() const { return Name; } 2679 2680 bool isSugared() const { return false; } 2681 QualType desugar() const { return QualType(this, 0); } 2682 2683 void Profile(llvm::FoldingSetNodeID &ID) { 2684 Profile(ID, Depth, Index, ParameterPack, Name); 2685 } 2686 2687 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2688 unsigned Index, bool ParameterPack, 2689 IdentifierInfo *Name) { 2690 ID.AddInteger(Depth); 2691 ID.AddInteger(Index); 2692 ID.AddBoolean(ParameterPack); 2693 ID.AddPointer(Name); 2694 } 2695 2696 static bool classof(const Type *T) { 2697 return T->getTypeClass() == TemplateTypeParm; 2698 } 2699 static bool classof(const TemplateTypeParmType *T) { return true; } 2700}; 2701 2702/// \brief Represents the result of substituting a type for a template 2703/// type parameter. 2704/// 2705/// Within an instantiated template, all template type parameters have 2706/// been replaced with these. They are used solely to record that a 2707/// type was originally written as a template type parameter; 2708/// therefore they are never canonical. 2709class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2710 // The original type parameter. 2711 const TemplateTypeParmType *Replaced; 2712 2713 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2714 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2715 Canon->isVariablyModifiedType(), 2716 Canon->containsUnexpandedParameterPack()), 2717 Replaced(Param) { } 2718 2719 friend class ASTContext; 2720 2721public: 2722 IdentifierInfo *getName() const { return Replaced->getName(); } 2723 2724 /// Gets the template parameter that was substituted for. 2725 const TemplateTypeParmType *getReplacedParameter() const { 2726 return Replaced; 2727 } 2728 2729 /// Gets the type that was substituted for the template 2730 /// parameter. 2731 QualType getReplacementType() const { 2732 return getCanonicalTypeInternal(); 2733 } 2734 2735 bool isSugared() const { return true; } 2736 QualType desugar() const { return getReplacementType(); } 2737 2738 void Profile(llvm::FoldingSetNodeID &ID) { 2739 Profile(ID, getReplacedParameter(), getReplacementType()); 2740 } 2741 static void Profile(llvm::FoldingSetNodeID &ID, 2742 const TemplateTypeParmType *Replaced, 2743 QualType Replacement) { 2744 ID.AddPointer(Replaced); 2745 ID.AddPointer(Replacement.getAsOpaquePtr()); 2746 } 2747 2748 static bool classof(const Type *T) { 2749 return T->getTypeClass() == SubstTemplateTypeParm; 2750 } 2751 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2752}; 2753 2754/// \brief Represents the type of a template specialization as written 2755/// in the source code. 2756/// 2757/// Template specialization types represent the syntactic form of a 2758/// template-id that refers to a type, e.g., @c vector<int>. Some 2759/// template specialization types are syntactic sugar, whose canonical 2760/// type will point to some other type node that represents the 2761/// instantiation or class template specialization. For example, a 2762/// class template specialization type of @c vector<int> will refer to 2763/// a tag type for the instantiation 2764/// @c std::vector<int, std::allocator<int>>. 2765/// 2766/// Other template specialization types, for which the template name 2767/// is dependent, may be canonical types. These types are always 2768/// dependent. 2769class TemplateSpecializationType 2770 : public Type, public llvm::FoldingSetNode { 2771 /// \brief The name of the template being specialized. 2772 TemplateName Template; 2773 2774 /// \brief - The number of template arguments named in this class 2775 /// template specialization. 2776 unsigned NumArgs; 2777 2778 TemplateSpecializationType(TemplateName T, 2779 const TemplateArgument *Args, 2780 unsigned NumArgs, QualType Canon); 2781 2782 friend class ASTContext; // ASTContext creates these 2783 2784public: 2785 /// \brief Determine whether any of the given template arguments are 2786 /// dependent. 2787 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2788 unsigned NumArgs); 2789 2790 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2791 unsigned NumArgs); 2792 2793 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2794 2795 /// \brief Print a template argument list, including the '<' and '>' 2796 /// enclosing the template arguments. 2797 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2798 unsigned NumArgs, 2799 const PrintingPolicy &Policy); 2800 2801 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2802 unsigned NumArgs, 2803 const PrintingPolicy &Policy); 2804 2805 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2806 const PrintingPolicy &Policy); 2807 2808 /// True if this template specialization type matches a current 2809 /// instantiation in the context in which it is found. 2810 bool isCurrentInstantiation() const { 2811 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2812 } 2813 2814 typedef const TemplateArgument * iterator; 2815 2816 iterator begin() const { return getArgs(); } 2817 iterator end() const; // defined inline in TemplateBase.h 2818 2819 /// \brief Retrieve the name of the template that we are specializing. 2820 TemplateName getTemplateName() const { return Template; } 2821 2822 /// \brief Retrieve the template arguments. 2823 const TemplateArgument *getArgs() const { 2824 return reinterpret_cast<const TemplateArgument *>(this + 1); 2825 } 2826 2827 /// \brief Retrieve the number of template arguments. 2828 unsigned getNumArgs() const { return NumArgs; } 2829 2830 /// \brief Retrieve a specific template argument as a type. 2831 /// \precondition @c isArgType(Arg) 2832 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2833 2834 bool isSugared() const { 2835 return !isDependentType() || isCurrentInstantiation(); 2836 } 2837 QualType desugar() const { return getCanonicalTypeInternal(); } 2838 2839 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2840 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2841 } 2842 2843 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2844 const TemplateArgument *Args, 2845 unsigned NumArgs, 2846 ASTContext &Context); 2847 2848 static bool classof(const Type *T) { 2849 return T->getTypeClass() == TemplateSpecialization; 2850 } 2851 static bool classof(const TemplateSpecializationType *T) { return true; } 2852}; 2853 2854/// \brief The injected class name of a C++ class template or class 2855/// template partial specialization. Used to record that a type was 2856/// spelled with a bare identifier rather than as a template-id; the 2857/// equivalent for non-templated classes is just RecordType. 2858/// 2859/// Injected class name types are always dependent. Template 2860/// instantiation turns these into RecordTypes. 2861/// 2862/// Injected class name types are always canonical. This works 2863/// because it is impossible to compare an injected class name type 2864/// with the corresponding non-injected template type, for the same 2865/// reason that it is impossible to directly compare template 2866/// parameters from different dependent contexts: injected class name 2867/// types can only occur within the scope of a particular templated 2868/// declaration, and within that scope every template specialization 2869/// will canonicalize to the injected class name (when appropriate 2870/// according to the rules of the language). 2871class InjectedClassNameType : public Type { 2872 CXXRecordDecl *Decl; 2873 2874 /// The template specialization which this type represents. 2875 /// For example, in 2876 /// template <class T> class A { ... }; 2877 /// this is A<T>, whereas in 2878 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2879 /// this is A<B<X,Y> >. 2880 /// 2881 /// It is always unqualified, always a template specialization type, 2882 /// and always dependent. 2883 QualType InjectedType; 2884 2885 friend class ASTContext; // ASTContext creates these. 2886 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2887 // currently suitable for AST reading, too much 2888 // interdependencies. 2889 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2890 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2891 /*VariablyModified=*/false, 2892 /*ContainsUnexpandedParameterPack=*/false), 2893 Decl(D), InjectedType(TST) { 2894 assert(isa<TemplateSpecializationType>(TST)); 2895 assert(!TST.hasQualifiers()); 2896 assert(TST->isDependentType()); 2897 } 2898 2899public: 2900 QualType getInjectedSpecializationType() const { return InjectedType; } 2901 const TemplateSpecializationType *getInjectedTST() const { 2902 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2903 } 2904 2905 CXXRecordDecl *getDecl() const; 2906 2907 bool isSugared() const { return false; } 2908 QualType desugar() const { return QualType(this, 0); } 2909 2910 static bool classof(const Type *T) { 2911 return T->getTypeClass() == InjectedClassName; 2912 } 2913 static bool classof(const InjectedClassNameType *T) { return true; } 2914}; 2915 2916/// \brief The kind of a tag type. 2917enum TagTypeKind { 2918 /// \brief The "struct" keyword. 2919 TTK_Struct, 2920 /// \brief The "union" keyword. 2921 TTK_Union, 2922 /// \brief The "class" keyword. 2923 TTK_Class, 2924 /// \brief The "enum" keyword. 2925 TTK_Enum 2926}; 2927 2928/// \brief The elaboration keyword that precedes a qualified type name or 2929/// introduces an elaborated-type-specifier. 2930enum ElaboratedTypeKeyword { 2931 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2932 ETK_Struct, 2933 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2934 ETK_Union, 2935 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2936 ETK_Class, 2937 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2938 ETK_Enum, 2939 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2940 /// \c typename T::type. 2941 ETK_Typename, 2942 /// \brief No keyword precedes the qualified type name. 2943 ETK_None 2944}; 2945 2946/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2947/// The keyword in stored in the free bits of the base class. 2948/// Also provides a few static helpers for converting and printing 2949/// elaborated type keyword and tag type kind enumerations. 2950class TypeWithKeyword : public Type { 2951protected: 2952 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2953 QualType Canonical, bool Dependent, bool VariablyModified, 2954 bool ContainsUnexpandedParameterPack) 2955 : Type(tc, Canonical, Dependent, VariablyModified, 2956 ContainsUnexpandedParameterPack) { 2957 TypeWithKeywordBits.Keyword = Keyword; 2958 } 2959 2960public: 2961 ElaboratedTypeKeyword getKeyword() const { 2962 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 2963 } 2964 2965 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2966 /// into an elaborated type keyword. 2967 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2968 2969 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2970 /// into a tag type kind. It is an error to provide a type specifier 2971 /// which *isn't* a tag kind here. 2972 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2973 2974 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2975 /// elaborated type keyword. 2976 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2977 2978 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2979 // a TagTypeKind. It is an error to provide an elaborated type keyword 2980 /// which *isn't* a tag kind here. 2981 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2982 2983 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2984 2985 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2986 2987 static const char *getTagTypeKindName(TagTypeKind Kind) { 2988 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2989 } 2990 2991 class CannotCastToThisType {}; 2992 static CannotCastToThisType classof(const Type *); 2993}; 2994 2995/// \brief Represents a type that was referred to using an elaborated type 2996/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2997/// or both. 2998/// 2999/// This type is used to keep track of a type name as written in the 3000/// source code, including tag keywords and any nested-name-specifiers. 3001/// The type itself is always "sugar", used to express what was written 3002/// in the source code but containing no additional semantic information. 3003class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3004 3005 /// \brief The nested name specifier containing the qualifier. 3006 NestedNameSpecifier *NNS; 3007 3008 /// \brief The type that this qualified name refers to. 3009 QualType NamedType; 3010 3011 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3012 QualType NamedType, QualType CanonType) 3013 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3014 NamedType->isDependentType(), 3015 NamedType->isVariablyModifiedType(), 3016 NamedType->containsUnexpandedParameterPack()), 3017 NNS(NNS), NamedType(NamedType) { 3018 assert(!(Keyword == ETK_None && NNS == 0) && 3019 "ElaboratedType cannot have elaborated type keyword " 3020 "and name qualifier both null."); 3021 } 3022 3023 friend class ASTContext; // ASTContext creates these 3024 3025public: 3026 ~ElaboratedType(); 3027 3028 /// \brief Retrieve the qualification on this type. 3029 NestedNameSpecifier *getQualifier() const { return NNS; } 3030 3031 /// \brief Retrieve the type named by the qualified-id. 3032 QualType getNamedType() const { return NamedType; } 3033 3034 /// \brief Remove a single level of sugar. 3035 QualType desugar() const { return getNamedType(); } 3036 3037 /// \brief Returns whether this type directly provides sugar. 3038 bool isSugared() const { return true; } 3039 3040 void Profile(llvm::FoldingSetNodeID &ID) { 3041 Profile(ID, getKeyword(), NNS, NamedType); 3042 } 3043 3044 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3045 NestedNameSpecifier *NNS, QualType NamedType) { 3046 ID.AddInteger(Keyword); 3047 ID.AddPointer(NNS); 3048 NamedType.Profile(ID); 3049 } 3050 3051 static bool classof(const Type *T) { 3052 return T->getTypeClass() == Elaborated; 3053 } 3054 static bool classof(const ElaboratedType *T) { return true; } 3055}; 3056 3057/// \brief Represents a qualified type name for which the type name is 3058/// dependent. 3059/// 3060/// DependentNameType represents a class of dependent types that involve a 3061/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3062/// name of a type. The DependentNameType may start with a "typename" (for a 3063/// typename-specifier), "class", "struct", "union", or "enum" (for a 3064/// dependent elaborated-type-specifier), or nothing (in contexts where we 3065/// know that we must be referring to a type, e.g., in a base class specifier). 3066class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3067 3068 /// \brief The nested name specifier containing the qualifier. 3069 NestedNameSpecifier *NNS; 3070 3071 /// \brief The type that this typename specifier refers to. 3072 const IdentifierInfo *Name; 3073 3074 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3075 const IdentifierInfo *Name, QualType CanonType) 3076 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3077 /*VariablyModified=*/false, 3078 NNS->containsUnexpandedParameterPack()), 3079 NNS(NNS), Name(Name) { 3080 assert(NNS->isDependent() && 3081 "DependentNameType requires a dependent nested-name-specifier"); 3082 } 3083 3084 friend class ASTContext; // ASTContext creates these 3085 3086public: 3087 /// \brief Retrieve the qualification on this type. 3088 NestedNameSpecifier *getQualifier() const { return NNS; } 3089 3090 /// \brief Retrieve the type named by the typename specifier as an 3091 /// identifier. 3092 /// 3093 /// This routine will return a non-NULL identifier pointer when the 3094 /// form of the original typename was terminated by an identifier, 3095 /// e.g., "typename T::type". 3096 const IdentifierInfo *getIdentifier() const { 3097 return Name; 3098 } 3099 3100 bool isSugared() const { return false; } 3101 QualType desugar() const { return QualType(this, 0); } 3102 3103 void Profile(llvm::FoldingSetNodeID &ID) { 3104 Profile(ID, getKeyword(), NNS, Name); 3105 } 3106 3107 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3108 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3109 ID.AddInteger(Keyword); 3110 ID.AddPointer(NNS); 3111 ID.AddPointer(Name); 3112 } 3113 3114 static bool classof(const Type *T) { 3115 return T->getTypeClass() == DependentName; 3116 } 3117 static bool classof(const DependentNameType *T) { return true; } 3118}; 3119 3120/// DependentTemplateSpecializationType - Represents a template 3121/// specialization type whose template cannot be resolved, e.g. 3122/// A<T>::template B<T> 3123class DependentTemplateSpecializationType : 3124 public TypeWithKeyword, public llvm::FoldingSetNode { 3125 3126 /// \brief The nested name specifier containing the qualifier. 3127 NestedNameSpecifier *NNS; 3128 3129 /// \brief The identifier of the template. 3130 const IdentifierInfo *Name; 3131 3132 /// \brief - The number of template arguments named in this class 3133 /// template specialization. 3134 unsigned NumArgs; 3135 3136 const TemplateArgument *getArgBuffer() const { 3137 return reinterpret_cast<const TemplateArgument*>(this+1); 3138 } 3139 TemplateArgument *getArgBuffer() { 3140 return reinterpret_cast<TemplateArgument*>(this+1); 3141 } 3142 3143 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3144 NestedNameSpecifier *NNS, 3145 const IdentifierInfo *Name, 3146 unsigned NumArgs, 3147 const TemplateArgument *Args, 3148 QualType Canon); 3149 3150 friend class ASTContext; // ASTContext creates these 3151 3152public: 3153 NestedNameSpecifier *getQualifier() const { return NNS; } 3154 const IdentifierInfo *getIdentifier() const { return Name; } 3155 3156 /// \brief Retrieve the template arguments. 3157 const TemplateArgument *getArgs() const { 3158 return getArgBuffer(); 3159 } 3160 3161 /// \brief Retrieve the number of template arguments. 3162 unsigned getNumArgs() const { return NumArgs; } 3163 3164 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3165 3166 typedef const TemplateArgument * iterator; 3167 iterator begin() const { return getArgs(); } 3168 iterator end() const; // inline in TemplateBase.h 3169 3170 bool isSugared() const { return false; } 3171 QualType desugar() const { return QualType(this, 0); } 3172 3173 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 3174 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3175 } 3176 3177 static void Profile(llvm::FoldingSetNodeID &ID, 3178 ASTContext &Context, 3179 ElaboratedTypeKeyword Keyword, 3180 NestedNameSpecifier *Qualifier, 3181 const IdentifierInfo *Name, 3182 unsigned NumArgs, 3183 const TemplateArgument *Args); 3184 3185 static bool classof(const Type *T) { 3186 return T->getTypeClass() == DependentTemplateSpecialization; 3187 } 3188 static bool classof(const DependentTemplateSpecializationType *T) { 3189 return true; 3190 } 3191}; 3192 3193/// \brief Represents a pack expansion of types. 3194/// 3195/// Pack expansions are part of C++0x variadic templates. A pack 3196/// expansion contains a pattern, which itself contains one or more 3197/// "unexpanded" parameter packs. When instantiated, a pack expansion 3198/// produces a series of types, each instantiated from the pattern of 3199/// the expansion, where the Ith instantiation of the pattern uses the 3200/// Ith arguments bound to each of the unexpanded parameter packs. The 3201/// pack expansion is considered to "expand" these unexpanded 3202/// parameter packs. 3203/// 3204/// \code 3205/// template<typename ...Types> struct tuple; 3206/// 3207/// template<typename ...Types> 3208/// struct tuple_of_references { 3209/// typedef tuple<Types&...> type; 3210/// }; 3211/// \endcode 3212/// 3213/// Here, the pack expansion \c Types&... is represented via a 3214/// PackExpansionType whose pattern is Types&. 3215class PackExpansionType : public Type, public llvm::FoldingSetNode { 3216 /// \brief The pattern of the pack expansion. 3217 QualType Pattern; 3218 3219 PackExpansionType(QualType Pattern, QualType Canon) 3220 : Type(PackExpansion, Canon, /*Dependent=*/true, 3221 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3222 /*ContainsUnexpandedParameterPack=*/false), 3223 Pattern(Pattern) { } 3224 3225 friend class ASTContext; // ASTContext creates these 3226 3227public: 3228 /// \brief Retrieve the pattern of this pack expansion, which is the 3229 /// type that will be repeatedly instantiated when instantiating the 3230 /// pack expansion itself. 3231 QualType getPattern() const { return Pattern; } 3232 3233 bool isSugared() const { return false; } 3234 QualType desugar() const { return QualType(this, 0); } 3235 3236 void Profile(llvm::FoldingSetNodeID &ID) { 3237 Profile(ID, getPattern()); 3238 } 3239 3240 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern) { 3241 ID.AddPointer(Pattern.getAsOpaquePtr()); 3242 } 3243 3244 static bool classof(const Type *T) { 3245 return T->getTypeClass() == PackExpansion; 3246 } 3247 static bool classof(const PackExpansionType *T) { 3248 return true; 3249 } 3250}; 3251 3252/// ObjCObjectType - Represents a class type in Objective C. 3253/// Every Objective C type is a combination of a base type and a 3254/// list of protocols. 3255/// 3256/// Given the following declarations: 3257/// @class C; 3258/// @protocol P; 3259/// 3260/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3261/// with base C and no protocols. 3262/// 3263/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3264/// 3265/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3266/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3267/// and no protocols. 3268/// 3269/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3270/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3271/// this should get its own sugar class to better represent the source. 3272class ObjCObjectType : public Type { 3273 // ObjCObjectType.NumProtocols - the number of protocols stored 3274 // after the ObjCObjectPointerType node. 3275 // 3276 // These protocols are those written directly on the type. If 3277 // protocol qualifiers ever become additive, the iterators will need 3278 // to get kindof complicated. 3279 // 3280 // In the canonical object type, these are sorted alphabetically 3281 // and uniqued. 3282 3283 /// Either a BuiltinType or an InterfaceType or sugar for either. 3284 QualType BaseType; 3285 3286 ObjCProtocolDecl * const *getProtocolStorage() const { 3287 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3288 } 3289 3290 ObjCProtocolDecl **getProtocolStorage(); 3291 3292protected: 3293 ObjCObjectType(QualType Canonical, QualType Base, 3294 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3295 3296 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3297 ObjCObjectType(enum Nonce_ObjCInterface) 3298 : Type(ObjCInterface, QualType(), false, false, false), 3299 BaseType(QualType(this_(), 0)) { 3300 ObjCObjectTypeBits.NumProtocols = 0; 3301 } 3302 3303public: 3304 /// getBaseType - Gets the base type of this object type. This is 3305 /// always (possibly sugar for) one of: 3306 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3307 /// user, which is a typedef for an ObjCPointerType) 3308 /// - the 'Class' builtin type (same caveat) 3309 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3310 QualType getBaseType() const { return BaseType; } 3311 3312 bool isObjCId() const { 3313 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3314 } 3315 bool isObjCClass() const { 3316 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3317 } 3318 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3319 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3320 bool isObjCUnqualifiedIdOrClass() const { 3321 if (!qual_empty()) return false; 3322 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3323 return T->getKind() == BuiltinType::ObjCId || 3324 T->getKind() == BuiltinType::ObjCClass; 3325 return false; 3326 } 3327 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3328 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3329 3330 /// Gets the interface declaration for this object type, if the base type 3331 /// really is an interface. 3332 ObjCInterfaceDecl *getInterface() const; 3333 3334 typedef ObjCProtocolDecl * const *qual_iterator; 3335 3336 qual_iterator qual_begin() const { return getProtocolStorage(); } 3337 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3338 3339 bool qual_empty() const { return getNumProtocols() == 0; } 3340 3341 /// getNumProtocols - Return the number of qualifying protocols in this 3342 /// interface type, or 0 if there are none. 3343 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3344 3345 /// \brief Fetch a protocol by index. 3346 ObjCProtocolDecl *getProtocol(unsigned I) const { 3347 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3348 return qual_begin()[I]; 3349 } 3350 3351 bool isSugared() const { return false; } 3352 QualType desugar() const { return QualType(this, 0); } 3353 3354 static bool classof(const Type *T) { 3355 return T->getTypeClass() == ObjCObject || 3356 T->getTypeClass() == ObjCInterface; 3357 } 3358 static bool classof(const ObjCObjectType *) { return true; } 3359}; 3360 3361/// ObjCObjectTypeImpl - A class providing a concrete implementation 3362/// of ObjCObjectType, so as to not increase the footprint of 3363/// ObjCInterfaceType. Code outside of ASTContext and the core type 3364/// system should not reference this type. 3365class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3366 friend class ASTContext; 3367 3368 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3369 // will need to be modified. 3370 3371 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3372 ObjCProtocolDecl * const *Protocols, 3373 unsigned NumProtocols) 3374 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3375 3376public: 3377 void Profile(llvm::FoldingSetNodeID &ID); 3378 static void Profile(llvm::FoldingSetNodeID &ID, 3379 QualType Base, 3380 ObjCProtocolDecl *const *protocols, 3381 unsigned NumProtocols); 3382}; 3383 3384inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3385 return reinterpret_cast<ObjCProtocolDecl**>( 3386 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3387} 3388 3389/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3390/// object oriented design. They basically correspond to C++ classes. There 3391/// are two kinds of interface types, normal interfaces like "NSString" and 3392/// qualified interfaces, which are qualified with a protocol list like 3393/// "NSString<NSCopyable, NSAmazing>". 3394/// 3395/// ObjCInterfaceType guarantees the following properties when considered 3396/// as a subtype of its superclass, ObjCObjectType: 3397/// - There are no protocol qualifiers. To reinforce this, code which 3398/// tries to invoke the protocol methods via an ObjCInterfaceType will 3399/// fail to compile. 3400/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3401/// T->getBaseType() == QualType(T, 0). 3402class ObjCInterfaceType : public ObjCObjectType { 3403 ObjCInterfaceDecl *Decl; 3404 3405 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3406 : ObjCObjectType(Nonce_ObjCInterface), 3407 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3408 friend class ASTContext; // ASTContext creates these. 3409 3410public: 3411 /// getDecl - Get the declaration of this interface. 3412 ObjCInterfaceDecl *getDecl() const { return Decl; } 3413 3414 bool isSugared() const { return false; } 3415 QualType desugar() const { return QualType(this, 0); } 3416 3417 static bool classof(const Type *T) { 3418 return T->getTypeClass() == ObjCInterface; 3419 } 3420 static bool classof(const ObjCInterfaceType *) { return true; } 3421 3422 // Nonsense to "hide" certain members of ObjCObjectType within this 3423 // class. People asking for protocols on an ObjCInterfaceType are 3424 // not going to get what they want: ObjCInterfaceTypes are 3425 // guaranteed to have no protocols. 3426 enum { 3427 qual_iterator, 3428 qual_begin, 3429 qual_end, 3430 getNumProtocols, 3431 getProtocol 3432 }; 3433}; 3434 3435inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3436 if (const ObjCInterfaceType *T = 3437 getBaseType()->getAs<ObjCInterfaceType>()) 3438 return T->getDecl(); 3439 return 0; 3440} 3441 3442/// ObjCObjectPointerType - Used to represent a pointer to an 3443/// Objective C object. These are constructed from pointer 3444/// declarators when the pointee type is an ObjCObjectType (or sugar 3445/// for one). In addition, the 'id' and 'Class' types are typedefs 3446/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3447/// are translated into these. 3448/// 3449/// Pointers to pointers to Objective C objects are still PointerTypes; 3450/// only the first level of pointer gets it own type implementation. 3451class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3452 QualType PointeeType; 3453 3454 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3455 : Type(ObjCObjectPointer, Canonical, false, false, false), 3456 PointeeType(Pointee) {} 3457 friend class ASTContext; // ASTContext creates these. 3458 3459public: 3460 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3461 /// The result will always be an ObjCObjectType or sugar thereof. 3462 QualType getPointeeType() const { return PointeeType; } 3463 3464 /// getObjCObjectType - Gets the type pointed to by this ObjC 3465 /// pointer. This method always returns non-null. 3466 /// 3467 /// This method is equivalent to getPointeeType() except that 3468 /// it discards any typedefs (or other sugar) between this 3469 /// type and the "outermost" object type. So for: 3470 /// @class A; @protocol P; @protocol Q; 3471 /// typedef A<P> AP; 3472 /// typedef A A1; 3473 /// typedef A1<P> A1P; 3474 /// typedef A1P<Q> A1PQ; 3475 /// For 'A*', getObjectType() will return 'A'. 3476 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3477 /// For 'AP*', getObjectType() will return 'A<P>'. 3478 /// For 'A1*', getObjectType() will return 'A'. 3479 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3480 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3481 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3482 /// adding protocols to a protocol-qualified base discards the 3483 /// old qualifiers (for now). But if it didn't, getObjectType() 3484 /// would return 'A1P<Q>' (and we'd have to make iterating over 3485 /// qualifiers more complicated). 3486 const ObjCObjectType *getObjectType() const { 3487 return PointeeType->getAs<ObjCObjectType>(); 3488 } 3489 3490 /// getInterfaceType - If this pointer points to an Objective C 3491 /// @interface type, gets the type for that interface. Any protocol 3492 /// qualifiers on the interface are ignored. 3493 /// 3494 /// \return null if the base type for this pointer is 'id' or 'Class' 3495 const ObjCInterfaceType *getInterfaceType() const { 3496 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3497 } 3498 3499 /// getInterfaceDecl - If this pointer points to an Objective @interface 3500 /// type, gets the declaration for that interface. 3501 /// 3502 /// \return null if the base type for this pointer is 'id' or 'Class' 3503 ObjCInterfaceDecl *getInterfaceDecl() const { 3504 return getObjectType()->getInterface(); 3505 } 3506 3507 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3508 /// its object type is the primitive 'id' type with no protocols. 3509 bool isObjCIdType() const { 3510 return getObjectType()->isObjCUnqualifiedId(); 3511 } 3512 3513 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3514 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3515 bool isObjCClassType() const { 3516 return getObjectType()->isObjCUnqualifiedClass(); 3517 } 3518 3519 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3520 /// non-empty set of protocols. 3521 bool isObjCQualifiedIdType() const { 3522 return getObjectType()->isObjCQualifiedId(); 3523 } 3524 3525 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3526 /// some non-empty set of protocols. 3527 bool isObjCQualifiedClassType() const { 3528 return getObjectType()->isObjCQualifiedClass(); 3529 } 3530 3531 /// An iterator over the qualifiers on the object type. Provided 3532 /// for convenience. This will always iterate over the full set of 3533 /// protocols on a type, not just those provided directly. 3534 typedef ObjCObjectType::qual_iterator qual_iterator; 3535 3536 qual_iterator qual_begin() const { 3537 return getObjectType()->qual_begin(); 3538 } 3539 qual_iterator qual_end() const { 3540 return getObjectType()->qual_end(); 3541 } 3542 bool qual_empty() const { return getObjectType()->qual_empty(); } 3543 3544 /// getNumProtocols - Return the number of qualifying protocols on 3545 /// the object type. 3546 unsigned getNumProtocols() const { 3547 return getObjectType()->getNumProtocols(); 3548 } 3549 3550 /// \brief Retrieve a qualifying protocol by index on the object 3551 /// type. 3552 ObjCProtocolDecl *getProtocol(unsigned I) const { 3553 return getObjectType()->getProtocol(I); 3554 } 3555 3556 bool isSugared() const { return false; } 3557 QualType desugar() const { return QualType(this, 0); } 3558 3559 void Profile(llvm::FoldingSetNodeID &ID) { 3560 Profile(ID, getPointeeType()); 3561 } 3562 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3563 ID.AddPointer(T.getAsOpaquePtr()); 3564 } 3565 static bool classof(const Type *T) { 3566 return T->getTypeClass() == ObjCObjectPointer; 3567 } 3568 static bool classof(const ObjCObjectPointerType *) { return true; } 3569}; 3570 3571/// A qualifier set is used to build a set of qualifiers. 3572class QualifierCollector : public Qualifiers { 3573public: 3574 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3575 3576 /// Collect any qualifiers on the given type and return an 3577 /// unqualified type. 3578 const Type *strip(QualType QT) { 3579 addFastQualifiers(QT.getLocalFastQualifiers()); 3580 if (QT.hasLocalNonFastQualifiers()) { 3581 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3582 addQualifiers(EQ->getQualifiers()); 3583 return EQ->getBaseType(); 3584 } 3585 return QT.getTypePtrUnsafe(); 3586 } 3587 3588 /// Apply the collected qualifiers to the given type. 3589 QualType apply(ASTContext &Context, QualType QT) const; 3590 3591 /// Apply the collected qualifiers to the given type. 3592 QualType apply(ASTContext &Context, const Type* T) const; 3593}; 3594 3595 3596// Inline function definitions. 3597 3598inline bool QualType::isCanonical() const { 3599 const Type *T = getTypePtr(); 3600 if (hasLocalQualifiers()) 3601 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3602 return T->isCanonicalUnqualified(); 3603} 3604 3605inline bool QualType::isCanonicalAsParam() const { 3606 if (hasLocalQualifiers()) return false; 3607 3608 const Type *T = getTypePtr(); 3609 if ((*this)->isPointerType()) { 3610 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3611 if (isa<VariableArrayType>(BaseType)) { 3612 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3613 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3614 if (VAT->getSizeExpr()) 3615 T = BaseType.getTypePtr(); 3616 } 3617 } 3618 return T->isCanonicalUnqualified() && 3619 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3620} 3621 3622inline bool QualType::isConstQualified() const { 3623 return isLocalConstQualified() || 3624 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3625} 3626 3627inline bool QualType::isRestrictQualified() const { 3628 return isLocalRestrictQualified() || 3629 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3630} 3631 3632 3633inline bool QualType::isVolatileQualified() const { 3634 return isLocalVolatileQualified() || 3635 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3636} 3637 3638inline bool QualType::hasQualifiers() const { 3639 return hasLocalQualifiers() || 3640 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3641} 3642 3643inline Qualifiers QualType::getQualifiers() const { 3644 Qualifiers Quals = getLocalQualifiers(); 3645 Quals.addQualifiers( 3646 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3647 return Quals; 3648} 3649 3650inline unsigned QualType::getCVRQualifiers() const { 3651 return getLocalCVRQualifiers() | 3652 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3653} 3654 3655/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3656/// type, returns them. Otherwise, if this is an array type, recurses 3657/// on the element type until some qualifiers have been found or a non-array 3658/// type reached. 3659inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3660 if (unsigned Quals = getCVRQualifiers()) 3661 return Quals; 3662 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3663 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3664 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3665 return 0; 3666} 3667 3668inline void QualType::removeLocalConst() { 3669 removeLocalFastQualifiers(Qualifiers::Const); 3670} 3671 3672inline void QualType::removeLocalRestrict() { 3673 removeLocalFastQualifiers(Qualifiers::Restrict); 3674} 3675 3676inline void QualType::removeLocalVolatile() { 3677 removeLocalFastQualifiers(Qualifiers::Volatile); 3678} 3679 3680inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 3681 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3682 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 3683 3684 // Fast path: we don't need to touch the slow qualifiers. 3685 removeLocalFastQualifiers(Mask); 3686} 3687 3688/// getAddressSpace - Return the address space of this type. 3689inline unsigned QualType::getAddressSpace() const { 3690 if (hasLocalNonFastQualifiers()) { 3691 const ExtQuals *EQ = getExtQualsUnsafe(); 3692 if (EQ->hasAddressSpace()) 3693 return EQ->getAddressSpace(); 3694 } 3695 3696 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3697 if (CT.hasLocalNonFastQualifiers()) { 3698 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3699 if (EQ->hasAddressSpace()) 3700 return EQ->getAddressSpace(); 3701 } 3702 3703 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3704 return AT->getElementType().getAddressSpace(); 3705 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3706 return RT->getAddressSpace(); 3707 return 0; 3708} 3709 3710/// getObjCGCAttr - Return the gc attribute of this type. 3711inline Qualifiers::GC QualType::getObjCGCAttr() const { 3712 if (hasLocalNonFastQualifiers()) { 3713 const ExtQuals *EQ = getExtQualsUnsafe(); 3714 if (EQ->hasObjCGCAttr()) 3715 return EQ->getObjCGCAttr(); 3716 } 3717 3718 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3719 if (CT.hasLocalNonFastQualifiers()) { 3720 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3721 if (EQ->hasObjCGCAttr()) 3722 return EQ->getObjCGCAttr(); 3723 } 3724 3725 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3726 return AT->getElementType().getObjCGCAttr(); 3727 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3728 return PT->getPointeeType().getObjCGCAttr(); 3729 // We most look at all pointer types, not just pointer to interface types. 3730 if (const PointerType *PT = CT->getAs<PointerType>()) 3731 return PT->getPointeeType().getObjCGCAttr(); 3732 return Qualifiers::GCNone; 3733} 3734 3735inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3736 if (const PointerType *PT = t.getAs<PointerType>()) { 3737 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3738 return FT->getExtInfo(); 3739 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3740 return FT->getExtInfo(); 3741 3742 return FunctionType::ExtInfo(); 3743} 3744 3745inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3746 return getFunctionExtInfo(*t); 3747} 3748 3749/// \brief Determine whether this set of qualifiers is a superset of the given 3750/// set of qualifiers. 3751inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3752 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3753} 3754 3755/// isMoreQualifiedThan - Determine whether this type is more 3756/// qualified than the Other type. For example, "const volatile int" 3757/// is more qualified than "const int", "volatile int", and 3758/// "int". However, it is not more qualified than "const volatile 3759/// int". 3760inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3761 // FIXME: work on arbitrary qualifiers 3762 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3763 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3764 if (getAddressSpace() != Other.getAddressSpace()) 3765 return false; 3766 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3767} 3768 3769/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3770/// as qualified as the Other type. For example, "const volatile 3771/// int" is at least as qualified as "const int", "volatile int", 3772/// "int", and "const volatile int". 3773inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3774 // FIXME: work on arbitrary qualifiers 3775 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3776 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3777 if (getAddressSpace() != Other.getAddressSpace()) 3778 return false; 3779 return (MyQuals | OtherQuals) == MyQuals; 3780} 3781 3782/// getNonReferenceType - If Type is a reference type (e.g., const 3783/// int&), returns the type that the reference refers to ("const 3784/// int"). Otherwise, returns the type itself. This routine is used 3785/// throughout Sema to implement C++ 5p6: 3786/// 3787/// If an expression initially has the type "reference to T" (8.3.2, 3788/// 8.5.3), the type is adjusted to "T" prior to any further 3789/// analysis, the expression designates the object or function 3790/// denoted by the reference, and the expression is an lvalue. 3791inline QualType QualType::getNonReferenceType() const { 3792 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3793 return RefType->getPointeeType(); 3794 else 3795 return *this; 3796} 3797 3798inline bool Type::isFunctionType() const { 3799 return isa<FunctionType>(CanonicalType); 3800} 3801inline bool Type::isPointerType() const { 3802 return isa<PointerType>(CanonicalType); 3803} 3804inline bool Type::isAnyPointerType() const { 3805 return isPointerType() || isObjCObjectPointerType(); 3806} 3807inline bool Type::isBlockPointerType() const { 3808 return isa<BlockPointerType>(CanonicalType); 3809} 3810inline bool Type::isReferenceType() const { 3811 return isa<ReferenceType>(CanonicalType); 3812} 3813inline bool Type::isLValueReferenceType() const { 3814 return isa<LValueReferenceType>(CanonicalType); 3815} 3816inline bool Type::isRValueReferenceType() const { 3817 return isa<RValueReferenceType>(CanonicalType); 3818} 3819inline bool Type::isFunctionPointerType() const { 3820 if (const PointerType* T = getAs<PointerType>()) 3821 return T->getPointeeType()->isFunctionType(); 3822 else 3823 return false; 3824} 3825inline bool Type::isMemberPointerType() const { 3826 return isa<MemberPointerType>(CanonicalType); 3827} 3828inline bool Type::isMemberFunctionPointerType() const { 3829 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3830 return T->isMemberFunctionPointer(); 3831 else 3832 return false; 3833} 3834inline bool Type::isMemberDataPointerType() const { 3835 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3836 return T->isMemberDataPointer(); 3837 else 3838 return false; 3839} 3840inline bool Type::isArrayType() const { 3841 return isa<ArrayType>(CanonicalType); 3842} 3843inline bool Type::isConstantArrayType() const { 3844 return isa<ConstantArrayType>(CanonicalType); 3845} 3846inline bool Type::isIncompleteArrayType() const { 3847 return isa<IncompleteArrayType>(CanonicalType); 3848} 3849inline bool Type::isVariableArrayType() const { 3850 return isa<VariableArrayType>(CanonicalType); 3851} 3852inline bool Type::isDependentSizedArrayType() const { 3853 return isa<DependentSizedArrayType>(CanonicalType); 3854} 3855inline bool Type::isBuiltinType() const { 3856 return isa<BuiltinType>(CanonicalType); 3857} 3858inline bool Type::isRecordType() const { 3859 return isa<RecordType>(CanonicalType); 3860} 3861inline bool Type::isEnumeralType() const { 3862 return isa<EnumType>(CanonicalType); 3863} 3864inline bool Type::isAnyComplexType() const { 3865 return isa<ComplexType>(CanonicalType); 3866} 3867inline bool Type::isVectorType() const { 3868 return isa<VectorType>(CanonicalType); 3869} 3870inline bool Type::isExtVectorType() const { 3871 return isa<ExtVectorType>(CanonicalType); 3872} 3873inline bool Type::isObjCObjectPointerType() const { 3874 return isa<ObjCObjectPointerType>(CanonicalType); 3875} 3876inline bool Type::isObjCObjectType() const { 3877 return isa<ObjCObjectType>(CanonicalType); 3878} 3879inline bool Type::isObjCObjectOrInterfaceType() const { 3880 return isa<ObjCInterfaceType>(CanonicalType) || 3881 isa<ObjCObjectType>(CanonicalType); 3882} 3883 3884inline bool Type::isObjCQualifiedIdType() const { 3885 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3886 return OPT->isObjCQualifiedIdType(); 3887 return false; 3888} 3889inline bool Type::isObjCQualifiedClassType() const { 3890 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3891 return OPT->isObjCQualifiedClassType(); 3892 return false; 3893} 3894inline bool Type::isObjCIdType() const { 3895 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3896 return OPT->isObjCIdType(); 3897 return false; 3898} 3899inline bool Type::isObjCClassType() const { 3900 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3901 return OPT->isObjCClassType(); 3902 return false; 3903} 3904inline bool Type::isObjCSelType() const { 3905 if (const PointerType *OPT = getAs<PointerType>()) 3906 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3907 return false; 3908} 3909inline bool Type::isObjCBuiltinType() const { 3910 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3911} 3912inline bool Type::isTemplateTypeParmType() const { 3913 return isa<TemplateTypeParmType>(CanonicalType); 3914} 3915 3916inline bool Type::isSpecificBuiltinType(unsigned K) const { 3917 if (const BuiltinType *BT = getAs<BuiltinType>()) 3918 if (BT->getKind() == (BuiltinType::Kind) K) 3919 return true; 3920 return false; 3921} 3922 3923inline bool Type::isPlaceholderType() const { 3924 if (const BuiltinType *BT = getAs<BuiltinType>()) 3925 return BT->isPlaceholderType(); 3926 return false; 3927} 3928 3929/// \brief Determines whether this is a type for which one can define 3930/// an overloaded operator. 3931inline bool Type::isOverloadableType() const { 3932 return isDependentType() || isRecordType() || isEnumeralType(); 3933} 3934 3935inline bool Type::hasPointerRepresentation() const { 3936 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3937 isObjCObjectPointerType() || isNullPtrType()); 3938} 3939 3940inline bool Type::hasObjCPointerRepresentation() const { 3941 return isObjCObjectPointerType(); 3942} 3943 3944/// Insertion operator for diagnostics. This allows sending QualType's into a 3945/// diagnostic with <<. 3946inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3947 QualType T) { 3948 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3949 Diagnostic::ak_qualtype); 3950 return DB; 3951} 3952 3953/// Insertion operator for partial diagnostics. This allows sending QualType's 3954/// into a diagnostic with <<. 3955inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3956 QualType T) { 3957 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3958 Diagnostic::ak_qualtype); 3959 return PD; 3960} 3961 3962// Helper class template that is used by Type::getAs to ensure that one does 3963// not try to look through a qualified type to get to an array type. 3964template<typename T, 3965 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3966 llvm::is_base_of<ArrayType, T>::value)> 3967struct ArrayType_cannot_be_used_with_getAs { }; 3968 3969template<typename T> 3970struct ArrayType_cannot_be_used_with_getAs<T, true>; 3971 3972/// Member-template getAs<specific type>'. 3973template <typename T> const T *Type::getAs() const { 3974 ArrayType_cannot_be_used_with_getAs<T> at; 3975 (void)at; 3976 3977 // If this is directly a T type, return it. 3978 if (const T *Ty = dyn_cast<T>(this)) 3979 return Ty; 3980 3981 // If the canonical form of this type isn't the right kind, reject it. 3982 if (!isa<T>(CanonicalType)) 3983 return 0; 3984 3985 // If this is a typedef for the type, strip the typedef off without 3986 // losing all typedef information. 3987 return cast<T>(getUnqualifiedDesugaredType()); 3988} 3989 3990} // end namespace clang 3991 3992#endif 3993