Type.h revision 5bfe232d1f07a6fd160fcf82c277c055a412a1c0
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 Type; 96 class ElaboratedType; 97 struct PrintingPolicy; 98 99 template <typename> class CanQual; 100 typedef CanQual<Type> CanQualType; 101 102 // Provide forward declarations for all of the *Type classes 103#define TYPE(Class, Base) class Class##Type; 104#include "clang/AST/TypeNodes.def" 105 106/// Qualifiers - The collection of all-type qualifiers we support. 107/// Clang supports five independent qualifiers: 108/// * C99: const, volatile, and restrict 109/// * Embedded C (TR18037): address spaces 110/// * Objective C: the GC attributes (none, weak, or strong) 111class Qualifiers { 112public: 113 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 114 Const = 0x1, 115 Restrict = 0x2, 116 Volatile = 0x4, 117 CVRMask = Const | Volatile | Restrict 118 }; 119 120 enum GC { 121 GCNone = 0, 122 Weak, 123 Strong 124 }; 125 126 enum { 127 /// The maximum supported address space number. 128 /// 24 bits should be enough for anyone. 129 MaxAddressSpace = 0xffffffu, 130 131 /// The width of the "fast" qualifier mask. 132 FastWidth = 3, 133 134 /// The fast qualifier mask. 135 FastMask = (1 << FastWidth) - 1 136 }; 137 138 Qualifiers() : Mask(0) {} 139 140 static Qualifiers fromFastMask(unsigned Mask) { 141 Qualifiers Qs; 142 Qs.addFastQualifiers(Mask); 143 return Qs; 144 } 145 146 static Qualifiers fromCVRMask(unsigned CVR) { 147 Qualifiers Qs; 148 Qs.addCVRQualifiers(CVR); 149 return Qs; 150 } 151 152 // Deserialize qualifiers from an opaque representation. 153 static Qualifiers fromOpaqueValue(unsigned opaque) { 154 Qualifiers Qs; 155 Qs.Mask = opaque; 156 return Qs; 157 } 158 159 // Serialize these qualifiers into an opaque representation. 160 unsigned getAsOpaqueValue() const { 161 return Mask; 162 } 163 164 bool hasConst() const { return Mask & Const; } 165 void setConst(bool flag) { 166 Mask = (Mask & ~Const) | (flag ? Const : 0); 167 } 168 void removeConst() { Mask &= ~Const; } 169 void addConst() { Mask |= Const; } 170 171 bool hasVolatile() const { return Mask & Volatile; } 172 void setVolatile(bool flag) { 173 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 174 } 175 void removeVolatile() { Mask &= ~Volatile; } 176 void addVolatile() { Mask |= Volatile; } 177 178 bool hasRestrict() const { return Mask & Restrict; } 179 void setRestrict(bool flag) { 180 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 181 } 182 void removeRestrict() { Mask &= ~Restrict; } 183 void addRestrict() { Mask |= Restrict; } 184 185 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 186 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 187 void setCVRQualifiers(unsigned mask) { 188 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 189 Mask = (Mask & ~CVRMask) | mask; 190 } 191 void removeCVRQualifiers(unsigned mask) { 192 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 193 Mask &= ~mask; 194 } 195 void removeCVRQualifiers() { 196 removeCVRQualifiers(CVRMask); 197 } 198 void addCVRQualifiers(unsigned mask) { 199 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 200 Mask |= mask; 201 } 202 203 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 204 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 205 void setObjCGCAttr(GC type) { 206 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 207 } 208 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 209 void addObjCGCAttr(GC type) { 210 assert(type); 211 setObjCGCAttr(type); 212 } 213 214 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 215 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 216 void setAddressSpace(unsigned space) { 217 assert(space <= MaxAddressSpace); 218 Mask = (Mask & ~AddressSpaceMask) 219 | (((uint32_t) space) << AddressSpaceShift); 220 } 221 void removeAddressSpace() { setAddressSpace(0); } 222 void addAddressSpace(unsigned space) { 223 assert(space); 224 setAddressSpace(space); 225 } 226 227 // Fast qualifiers are those that can be allocated directly 228 // on a QualType object. 229 bool hasFastQualifiers() const { return getFastQualifiers(); } 230 unsigned getFastQualifiers() const { return Mask & FastMask; } 231 void setFastQualifiers(unsigned mask) { 232 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 233 Mask = (Mask & ~FastMask) | mask; 234 } 235 void removeFastQualifiers(unsigned mask) { 236 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 237 Mask &= ~mask; 238 } 239 void removeFastQualifiers() { 240 removeFastQualifiers(FastMask); 241 } 242 void addFastQualifiers(unsigned mask) { 243 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 244 Mask |= mask; 245 } 246 247 /// hasNonFastQualifiers - Return true if the set contains any 248 /// qualifiers which require an ExtQuals node to be allocated. 249 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 250 Qualifiers getNonFastQualifiers() const { 251 Qualifiers Quals = *this; 252 Quals.setFastQualifiers(0); 253 return Quals; 254 } 255 256 /// hasQualifiers - Return true if the set contains any qualifiers. 257 bool hasQualifiers() const { return Mask; } 258 bool empty() const { return !Mask; } 259 260 /// \brief Add the qualifiers from the given set to this set. 261 void addQualifiers(Qualifiers Q) { 262 // If the other set doesn't have any non-boolean qualifiers, just 263 // bit-or it in. 264 if (!(Q.Mask & ~CVRMask)) 265 Mask |= Q.Mask; 266 else { 267 Mask |= (Q.Mask & CVRMask); 268 if (Q.hasAddressSpace()) 269 addAddressSpace(Q.getAddressSpace()); 270 if (Q.hasObjCGCAttr()) 271 addObjCGCAttr(Q.getObjCGCAttr()); 272 } 273 } 274 275 bool isSupersetOf(Qualifiers Other) const; 276 277 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 278 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 279 280 operator bool() const { return hasQualifiers(); } 281 282 Qualifiers &operator+=(Qualifiers R) { 283 addQualifiers(R); 284 return *this; 285 } 286 287 // Union two qualifier sets. If an enumerated qualifier appears 288 // in both sets, use the one from the right. 289 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 290 L += R; 291 return L; 292 } 293 294 Qualifiers &operator-=(Qualifiers R) { 295 Mask = Mask & ~(R.Mask); 296 return *this; 297 } 298 299 /// \brief Compute the difference between two qualifier sets. 300 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 301 L -= R; 302 return L; 303 } 304 305 std::string getAsString() const; 306 std::string getAsString(const PrintingPolicy &Policy) const { 307 std::string Buffer; 308 getAsStringInternal(Buffer, Policy); 309 return Buffer; 310 } 311 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 312 313 void Profile(llvm::FoldingSetNodeID &ID) const { 314 ID.AddInteger(Mask); 315 } 316 317private: 318 319 // bits: |0 1 2|3 .. 4|5 .. 31| 320 // |C R V|GCAttr|AddrSpace| 321 uint32_t Mask; 322 323 static const uint32_t GCAttrMask = 0x18; 324 static const uint32_t GCAttrShift = 3; 325 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 326 static const uint32_t AddressSpaceShift = 5; 327}; 328 329/// \brief Base class that is common to both the \c ExtQuals and \c Type 330/// classes, which allows \c QualType to access the common fields between the 331/// two. 332/// 333class ExtQualsTypeCommonBase { 334protected: 335 ExtQualsTypeCommonBase(const Type *BaseType) : BaseType(BaseType) { } 336 337 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 338 /// a self-referential pointer (for \c Type). 339 /// 340 /// This pointer allows an efficient mapping from a QualType to its 341 /// underlying type pointer. 342 const Type *BaseType; 343 344 friend class QualType; 345}; 346 347/// ExtQuals - We can encode up to four bits in the low bits of a 348/// type pointer, but there are many more type qualifiers that we want 349/// to be able to apply to an arbitrary type. Therefore we have this 350/// struct, intended to be heap-allocated and used by QualType to 351/// store qualifiers. 352/// 353/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 354/// in three low bits on the QualType pointer; a fourth bit records whether 355/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 356/// Objective-C GC attributes) are much more rare. 357class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 358 // NOTE: changing the fast qualifiers should be straightforward as 359 // long as you don't make 'const' non-fast. 360 // 1. Qualifiers: 361 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 362 // Fast qualifiers must occupy the low-order bits. 363 // b) Update Qualifiers::FastWidth and FastMask. 364 // 2. QualType: 365 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 366 // b) Update remove{Volatile,Restrict}, defined near the end of 367 // this header. 368 // 3. ASTContext: 369 // a) Update get{Volatile,Restrict}Type. 370 371 /// Quals - the immutable set of qualifiers applied by this 372 /// node; always contains extended qualifiers. 373 Qualifiers Quals; 374 375public: 376 ExtQuals(const Type *Base, Qualifiers Quals) 377 : ExtQualsTypeCommonBase(Base), Quals(Quals) 378 { 379 assert(Quals.hasNonFastQualifiers() 380 && "ExtQuals created with no fast qualifiers"); 381 assert(!Quals.hasFastQualifiers() 382 && "ExtQuals created with fast qualifiers"); 383 } 384 385 Qualifiers getQualifiers() const { return Quals; } 386 387 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 388 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 389 390 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 391 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 392 393 const Type *getBaseType() const { return BaseType; } 394 395public: 396 void Profile(llvm::FoldingSetNodeID &ID) const { 397 Profile(ID, getBaseType(), Quals); 398 } 399 static void Profile(llvm::FoldingSetNodeID &ID, 400 const Type *BaseType, 401 Qualifiers Quals) { 402 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 403 ID.AddPointer(BaseType); 404 Quals.Profile(ID); 405 } 406}; 407 408/// CallingConv - Specifies the calling convention that a function uses. 409enum CallingConv { 410 CC_Default, 411 CC_C, // __attribute__((cdecl)) 412 CC_X86StdCall, // __attribute__((stdcall)) 413 CC_X86FastCall, // __attribute__((fastcall)) 414 CC_X86ThisCall, // __attribute__((thiscall)) 415 CC_X86Pascal // __attribute__((pascal)) 416}; 417 418typedef std::pair<const Type*, Qualifiers> SplitQualType; 419 420/// QualType - For efficiency, we don't store CV-qualified types as nodes on 421/// their own: instead each reference to a type stores the qualifiers. This 422/// greatly reduces the number of nodes we need to allocate for types (for 423/// example we only need one for 'int', 'const int', 'volatile int', 424/// 'const volatile int', etc). 425/// 426/// As an added efficiency bonus, instead of making this a pair, we 427/// just store the two bits we care about in the low bits of the 428/// pointer. To handle the packing/unpacking, we make QualType be a 429/// simple wrapper class that acts like a smart pointer. A third bit 430/// indicates whether there are extended qualifiers present, in which 431/// case the pointer points to a special structure. 432class QualType { 433 // Thankfully, these are efficiently composable. 434 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 435 Qualifiers::FastWidth> Value; 436 437 const ExtQuals *getExtQualsUnsafe() const { 438 return Value.getPointer().get<const ExtQuals*>(); 439 } 440 441 const Type *getTypePtrUnsafe() const { 442 return Value.getPointer().get<const Type*>(); 443 } 444 445 QualType getUnqualifiedTypeSlow() const; 446 447 friend class QualifierCollector; 448public: 449 QualType() {} 450 451 QualType(const Type *Ptr, unsigned Quals) 452 : Value(Ptr, Quals) {} 453 QualType(const ExtQuals *Ptr, unsigned Quals) 454 : Value(Ptr, Quals) {} 455 456 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 457 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 458 459 /// Retrieves a pointer to the underlying (unqualified) type. 460 /// This should really return a const Type, but it's not worth 461 /// changing all the users right now. 462 /// 463 /// This function requires that the type not be NULL. If the type might be 464 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 465 Type *getTypePtr() const { 466 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 467 uintptr_t CommonPtrVal 468 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 469 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 470 ExtQualsTypeCommonBase *CommonPtr 471 = reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 472 return const_cast<Type *>(CommonPtr->BaseType); 473 } 474 475 Type *getTypePtrOrNull() const { 476 uintptr_t TypePtrPtrVal 477 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 478 TypePtrPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 479 Type **TypePtrPtr = reinterpret_cast<Type**>(TypePtrPtrVal); 480 return TypePtrPtr? *TypePtrPtr : 0; 481 } 482 483 /// Divides a QualType into its unqualified type and a set of local 484 /// qualifiers. 485 SplitQualType split() const { 486 if (!hasLocalNonFastQualifiers()) 487 return SplitQualType(getTypePtrUnsafe(), 488 Qualifiers::fromFastMask(getLocalFastQualifiers())); 489 490 const ExtQuals *eq = getExtQualsUnsafe(); 491 Qualifiers qs = eq->getQualifiers(); 492 qs.addFastQualifiers(getLocalFastQualifiers()); 493 return SplitQualType(eq->getBaseType(), qs); 494 } 495 496 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 497 static QualType getFromOpaquePtr(void *Ptr) { 498 QualType T; 499 T.Value.setFromOpaqueValue(Ptr); 500 return T; 501 } 502 503 Type &operator*() const { 504 return *getTypePtr(); 505 } 506 507 Type *operator->() const { 508 return getTypePtr(); 509 } 510 511 bool isCanonical() const; 512 bool isCanonicalAsParam() const; 513 514 /// isNull - Return true if this QualType doesn't point to a type yet. 515 bool isNull() const { 516 return Value.getPointer().isNull(); 517 } 518 519 /// \brief Determine whether this particular QualType instance has the 520 /// "const" qualifier set, without looking through typedefs that may have 521 /// added "const" at a different level. 522 bool isLocalConstQualified() const { 523 return (getLocalFastQualifiers() & Qualifiers::Const); 524 } 525 526 /// \brief Determine whether this type is const-qualified. 527 bool isConstQualified() const; 528 529 /// \brief Determine whether this particular QualType instance has the 530 /// "restrict" qualifier set, without looking through typedefs that may have 531 /// added "restrict" at a different level. 532 bool isLocalRestrictQualified() const { 533 return (getLocalFastQualifiers() & Qualifiers::Restrict); 534 } 535 536 /// \brief Determine whether this type is restrict-qualified. 537 bool isRestrictQualified() const; 538 539 /// \brief Determine whether this particular QualType instance has the 540 /// "volatile" qualifier set, without looking through typedefs that may have 541 /// added "volatile" at a different level. 542 bool isLocalVolatileQualified() const { 543 return (getLocalFastQualifiers() & Qualifiers::Volatile); 544 } 545 546 /// \brief Determine whether this type is volatile-qualified. 547 bool isVolatileQualified() const; 548 549 /// \brief Determine whether this particular QualType instance has any 550 /// qualifiers, without looking through any typedefs that might add 551 /// qualifiers at a different level. 552 bool hasLocalQualifiers() const { 553 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 554 } 555 556 /// \brief Determine whether this type has any qualifiers. 557 bool hasQualifiers() const; 558 559 /// \brief Determine whether this particular QualType instance has any 560 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 561 /// instance. 562 bool hasLocalNonFastQualifiers() const { 563 return Value.getPointer().is<const ExtQuals*>(); 564 } 565 566 /// \brief Retrieve the set of qualifiers local to this particular QualType 567 /// instance, not including any qualifiers acquired through typedefs or 568 /// other sugar. 569 Qualifiers getLocalQualifiers() const { 570 Qualifiers Quals; 571 if (hasLocalNonFastQualifiers()) 572 Quals = getExtQualsUnsafe()->getQualifiers(); 573 Quals.addFastQualifiers(getLocalFastQualifiers()); 574 return Quals; 575 } 576 577 /// \brief Retrieve the set of qualifiers applied to this type. 578 Qualifiers getQualifiers() const; 579 580 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 581 /// local to this particular QualType instance, not including any qualifiers 582 /// acquired through typedefs or other sugar. 583 unsigned getLocalCVRQualifiers() const { 584 return getLocalFastQualifiers(); 585 } 586 587 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 588 /// applied to this type. 589 unsigned getCVRQualifiers() const; 590 591 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 592 /// applied to this type, looking through any number of unqualified array 593 /// types to their element types' qualifiers. 594 unsigned getCVRQualifiersThroughArrayTypes() const; 595 596 bool isConstant(ASTContext& Ctx) const { 597 return QualType::isConstant(*this, Ctx); 598 } 599 600 // Don't promise in the API that anything besides 'const' can be 601 // easily added. 602 603 /// addConst - add the specified type qualifier to this QualType. 604 void addConst() { 605 addFastQualifiers(Qualifiers::Const); 606 } 607 QualType withConst() const { 608 return withFastQualifiers(Qualifiers::Const); 609 } 610 611 void addFastQualifiers(unsigned TQs) { 612 assert(!(TQs & ~Qualifiers::FastMask) 613 && "non-fast qualifier bits set in mask!"); 614 Value.setInt(Value.getInt() | TQs); 615 } 616 617 void removeLocalConst(); 618 void removeLocalVolatile(); 619 void removeLocalRestrict(); 620 void removeLocalCVRQualifiers(unsigned Mask); 621 622 void removeLocalFastQualifiers() { Value.setInt(0); } 623 void removeLocalFastQualifiers(unsigned Mask) { 624 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 625 Value.setInt(Value.getInt() & ~Mask); 626 } 627 628 // Creates a type with the given qualifiers in addition to any 629 // qualifiers already on this type. 630 QualType withFastQualifiers(unsigned TQs) const { 631 QualType T = *this; 632 T.addFastQualifiers(TQs); 633 return T; 634 } 635 636 // Creates a type with exactly the given fast qualifiers, removing 637 // any existing fast qualifiers. 638 QualType withExactLocalFastQualifiers(unsigned TQs) const { 639 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 640 } 641 642 // Removes fast qualifiers, but leaves any extended qualifiers in place. 643 QualType withoutLocalFastQualifiers() const { 644 QualType T = *this; 645 T.removeLocalFastQualifiers(); 646 return T; 647 } 648 649 /// \brief Return this type with all of the instance-specific qualifiers 650 /// removed, but without removing any qualifiers that may have been applied 651 /// through typedefs. 652 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 653 654 /// \brief Return the unqualified form of the given type, which might be 655 /// desugared to eliminate qualifiers introduced via typedefs. 656 QualType getUnqualifiedType() const { 657 QualType T = getLocalUnqualifiedType(); 658 if (!T.hasQualifiers()) 659 return T; 660 661 return getUnqualifiedTypeSlow(); 662 } 663 664 bool isMoreQualifiedThan(QualType Other) const; 665 bool isAtLeastAsQualifiedAs(QualType Other) const; 666 QualType getNonReferenceType() const; 667 668 /// \brief Determine the type of a (typically non-lvalue) expression with the 669 /// specified result type. 670 /// 671 /// This routine should be used for expressions for which the return type is 672 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 673 /// an lvalue. It removes a top-level reference (since there are no 674 /// expressions of reference type) and deletes top-level cvr-qualifiers 675 /// from non-class types (in C++) or all types (in C). 676 QualType getNonLValueExprType(ASTContext &Context) const; 677 678 /// getDesugaredType - Return the specified type with any "sugar" removed from 679 /// the type. This takes off typedefs, typeof's etc. If the outer level of 680 /// the type is already concrete, it returns it unmodified. This is similar 681 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 682 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 683 /// concrete. 684 /// 685 /// Qualifiers are left in place. 686 QualType getDesugaredType(ASTContext &Context) const { 687 return getDesugaredType(*this, Context); 688 } 689 690 SplitQualType getSplitDesugaredType() const { 691 return getSplitDesugaredType(*this); 692 } 693 694 /// IgnoreParens - Returns the specified type after dropping any 695 /// outer-level parentheses. 696 QualType IgnoreParens() const { 697 return QualType::IgnoreParens(*this); 698 } 699 700 /// operator==/!= - Indicate whether the specified types and qualifiers are 701 /// identical. 702 friend bool operator==(const QualType &LHS, const QualType &RHS) { 703 return LHS.Value == RHS.Value; 704 } 705 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 706 return LHS.Value != RHS.Value; 707 } 708 std::string getAsString() const { 709 return getAsString(split()); 710 } 711 static std::string getAsString(SplitQualType split) { 712 return getAsString(split.first, split.second); 713 } 714 static std::string getAsString(const Type *ty, Qualifiers qs); 715 716 std::string getAsString(const PrintingPolicy &Policy) const { 717 std::string S; 718 getAsStringInternal(S, Policy); 719 return S; 720 } 721 void getAsStringInternal(std::string &Str, 722 const PrintingPolicy &Policy) const { 723 return getAsStringInternal(split(), Str, Policy); 724 } 725 static void getAsStringInternal(SplitQualType split, std::string &out, 726 const PrintingPolicy &policy) { 727 return getAsStringInternal(split.first, split.second, out, policy); 728 } 729 static void getAsStringInternal(const Type *ty, Qualifiers qs, 730 std::string &out, 731 const PrintingPolicy &policy); 732 733 void dump(const char *s) const; 734 void dump() const; 735 736 void Profile(llvm::FoldingSetNodeID &ID) const { 737 ID.AddPointer(getAsOpaquePtr()); 738 } 739 740 /// getAddressSpace - Return the address space of this type. 741 inline unsigned getAddressSpace() const; 742 743 /// GCAttrTypesAttr - Returns gc attribute of this type. 744 inline Qualifiers::GC getObjCGCAttr() const; 745 746 /// isObjCGCWeak true when Type is objc's weak. 747 bool isObjCGCWeak() const { 748 return getObjCGCAttr() == Qualifiers::Weak; 749 } 750 751 /// isObjCGCStrong true when Type is objc's strong. 752 bool isObjCGCStrong() const { 753 return getObjCGCAttr() == Qualifiers::Strong; 754 } 755 756private: 757 // These methods are implemented in a separate translation unit; 758 // "static"-ize them to avoid creating temporary QualTypes in the 759 // caller. 760 static bool isConstant(QualType T, ASTContext& Ctx); 761 static QualType getDesugaredType(QualType T, ASTContext &Context); 762 static SplitQualType getSplitDesugaredType(QualType T); 763 static QualType IgnoreParens(QualType T); 764}; 765 766} // end clang. 767 768namespace llvm { 769/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 770/// to a specific Type class. 771template<> struct simplify_type<const ::clang::QualType> { 772 typedef ::clang::Type* SimpleType; 773 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 774 return Val.getTypePtr(); 775 } 776}; 777template<> struct simplify_type< ::clang::QualType> 778 : public simplify_type<const ::clang::QualType> {}; 779 780// Teach SmallPtrSet that QualType is "basically a pointer". 781template<> 782class PointerLikeTypeTraits<clang::QualType> { 783public: 784 static inline void *getAsVoidPointer(clang::QualType P) { 785 return P.getAsOpaquePtr(); 786 } 787 static inline clang::QualType getFromVoidPointer(void *P) { 788 return clang::QualType::getFromOpaquePtr(P); 789 } 790 // Various qualifiers go in low bits. 791 enum { NumLowBitsAvailable = 0 }; 792}; 793 794} // end namespace llvm 795 796namespace clang { 797 798/// Type - This is the base class of the type hierarchy. A central concept 799/// with types is that each type always has a canonical type. A canonical type 800/// is the type with any typedef names stripped out of it or the types it 801/// references. For example, consider: 802/// 803/// typedef int foo; 804/// typedef foo* bar; 805/// 'int *' 'foo *' 'bar' 806/// 807/// There will be a Type object created for 'int'. Since int is canonical, its 808/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 809/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 810/// there is a PointerType that represents 'int*', which, like 'int', is 811/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 812/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 813/// is also 'int*'. 814/// 815/// Non-canonical types are useful for emitting diagnostics, without losing 816/// information about typedefs being used. Canonical types are useful for type 817/// comparisons (they allow by-pointer equality tests) and useful for reasoning 818/// about whether something has a particular form (e.g. is a function type), 819/// because they implicitly, recursively, strip all typedefs out of a type. 820/// 821/// Types, once created, are immutable. 822/// 823class Type : public ExtQualsTypeCommonBase { 824public: 825 enum TypeClass { 826#define TYPE(Class, Base) Class, 827#define LAST_TYPE(Class) TypeLast = Class, 828#define ABSTRACT_TYPE(Class, Base) 829#include "clang/AST/TypeNodes.def" 830 TagFirst = Record, TagLast = Enum 831 }; 832 833private: 834 Type(const Type&); // DO NOT IMPLEMENT. 835 void operator=(const Type&); // DO NOT IMPLEMENT. 836 837 QualType CanonicalType; 838 839 /// Bitfields required by the Type class. 840 class TypeBitfields { 841 friend class Type; 842 template <class T> friend class TypePropertyCache; 843 844 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 845 unsigned TC : 8; 846 847 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 848 /// Note that this should stay at the end of the ivars for Type so that 849 /// subclasses can pack their bitfields into the same word. 850 unsigned Dependent : 1; 851 852 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 853 unsigned VariablyModified : 1; 854 855 /// \brief Whether this type contains an unexpanded parameter pack 856 /// (for C++0x variadic templates). 857 unsigned ContainsUnexpandedParameterPack : 1; 858 859 /// \brief Nonzero if the cache (i.e. the bitfields here starting 860 /// with 'Cache') is valid. If so, then this is a 861 /// LangOptions::VisibilityMode+1. 862 mutable unsigned CacheValidAndVisibility : 2; 863 864 /// \brief Linkage of this type. 865 mutable unsigned CachedLinkage : 2; 866 867 /// \brief Whether this type involves and local or unnamed types. 868 mutable unsigned CachedLocalOrUnnamed : 1; 869 870 /// \brief FromAST - Whether this type comes from an AST file. 871 mutable unsigned FromAST : 1; 872 873 bool isCacheValid() const { 874 return (CacheValidAndVisibility != 0); 875 } 876 Visibility getVisibility() const { 877 assert(isCacheValid() && "getting linkage from invalid cache"); 878 return static_cast<Visibility>(CacheValidAndVisibility-1); 879 } 880 Linkage getLinkage() const { 881 assert(isCacheValid() && "getting linkage from invalid cache"); 882 return static_cast<Linkage>(CachedLinkage); 883 } 884 bool hasLocalOrUnnamedType() const { 885 assert(isCacheValid() && "getting linkage from invalid cache"); 886 return CachedLocalOrUnnamed; 887 } 888 }; 889 enum { NumTypeBits = 17 }; 890 891protected: 892 // These classes allow subclasses to somewhat cleanly pack bitfields 893 // into Type. 894 895 class ArrayTypeBitfields { 896 friend class ArrayType; 897 898 unsigned : NumTypeBits; 899 900 /// IndexTypeQuals - CVR qualifiers from declarations like 901 /// 'int X[static restrict 4]'. For function parameters only. 902 unsigned IndexTypeQuals : 3; 903 904 /// SizeModifier - storage class qualifiers from declarations like 905 /// 'int X[static restrict 4]'. For function parameters only. 906 /// Actually an ArrayType::ArraySizeModifier. 907 unsigned SizeModifier : 3; 908 }; 909 910 class BuiltinTypeBitfields { 911 friend class BuiltinType; 912 913 unsigned : NumTypeBits; 914 915 /// The kind (BuiltinType::Kind) of builtin type this is. 916 unsigned Kind : 8; 917 }; 918 919 class FunctionTypeBitfields { 920 friend class FunctionType; 921 922 unsigned : NumTypeBits; 923 924 /// Extra information which affects how the function is called, like 925 /// regparm and the calling convention. 926 unsigned ExtInfo : 8; 927 928 /// A bit to be used by the subclass. 929 unsigned SubclassInfo : 1; 930 931 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 932 /// other bitfields. 933 /// The qualifiers are part of FunctionProtoType because... 934 /// 935 /// C++ 8.3.5p4: The return type, the parameter type list and the 936 /// cv-qualifier-seq, [...], are part of the function type. 937 unsigned TypeQuals : 3; 938 }; 939 940 class ObjCObjectTypeBitfields { 941 friend class ObjCObjectType; 942 943 unsigned : NumTypeBits; 944 945 /// NumProtocols - The number of protocols stored directly on this 946 /// object type. 947 unsigned NumProtocols : 32 - NumTypeBits; 948 }; 949 950 class ReferenceTypeBitfields { 951 friend class ReferenceType; 952 953 unsigned : NumTypeBits; 954 955 /// True if the type was originally spelled with an lvalue sigil. 956 /// This is never true of rvalue references but can also be false 957 /// on lvalue references because of C++0x [dcl.typedef]p9, 958 /// as follows: 959 /// 960 /// typedef int &ref; // lvalue, spelled lvalue 961 /// typedef int &&rvref; // rvalue 962 /// ref &a; // lvalue, inner ref, spelled lvalue 963 /// ref &&a; // lvalue, inner ref 964 /// rvref &a; // lvalue, inner ref, spelled lvalue 965 /// rvref &&a; // rvalue, inner ref 966 unsigned SpelledAsLValue : 1; 967 968 /// True if the inner type is a reference type. This only happens 969 /// in non-canonical forms. 970 unsigned InnerRef : 1; 971 }; 972 973 class TypeWithKeywordBitfields { 974 friend class TypeWithKeyword; 975 976 unsigned : NumTypeBits; 977 978 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 979 unsigned Keyword : 8; 980 }; 981 982 class VectorTypeBitfields { 983 friend class VectorType; 984 985 unsigned : NumTypeBits; 986 987 /// VecKind - The kind of vector, either a generic vector type or some 988 /// target-specific vector type such as for AltiVec or Neon. 989 unsigned VecKind : 3; 990 991 /// NumElements - The number of elements in the vector. 992 unsigned NumElements : 29 - NumTypeBits; 993 }; 994 995 union { 996 TypeBitfields TypeBits; 997 ArrayTypeBitfields ArrayTypeBits; 998 BuiltinTypeBitfields BuiltinTypeBits; 999 FunctionTypeBitfields FunctionTypeBits; 1000 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1001 ReferenceTypeBitfields ReferenceTypeBits; 1002 TypeWithKeywordBitfields TypeWithKeywordBits; 1003 VectorTypeBitfields VectorTypeBits; 1004 }; 1005 1006private: 1007 /// \brief Set whether this type comes from an AST file. 1008 void setFromAST(bool V = true) const { 1009 TypeBits.FromAST = V; 1010 } 1011 1012 template <class T> friend class TypePropertyCache; 1013 1014protected: 1015 // silence VC++ warning C4355: 'this' : used in base member initializer list 1016 Type *this_() { return this; } 1017 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified, 1018 bool ContainsUnexpandedParameterPack) 1019 : ExtQualsTypeCommonBase(this), 1020 CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical) { 1021 TypeBits.TC = tc; 1022 TypeBits.Dependent = Dependent; 1023 TypeBits.VariablyModified = VariablyModified; 1024 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1025 TypeBits.CacheValidAndVisibility = 0; 1026 TypeBits.CachedLocalOrUnnamed = false; 1027 TypeBits.CachedLinkage = NoLinkage; 1028 TypeBits.FromAST = false; 1029 } 1030 friend class ASTContext; 1031 1032 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1033 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1034 void setContainsUnexpandedParameterPack(bool PP = true) { 1035 TypeBits.ContainsUnexpandedParameterPack = PP; 1036 } 1037 1038public: 1039 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1040 1041 /// \brief Whether this type comes from an AST file. 1042 bool isFromAST() const { return TypeBits.FromAST; } 1043 1044 /// \brief Whether this type is or contains an unexpanded parameter 1045 /// pack, used to support C++0x variadic templates. 1046 /// 1047 /// A type that contains a parameter pack shall be expanded by the 1048 /// ellipsis operator at some point. For example, the typedef in the 1049 /// following example contains an unexpanded parameter pack 'T': 1050 /// 1051 /// \code 1052 /// template<typename ...T> 1053 /// struct X { 1054 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1055 /// }; 1056 /// \endcode 1057 /// 1058 /// Note that this routine does not specify which 1059 bool containsUnexpandedParameterPack() const { 1060 return TypeBits.ContainsUnexpandedParameterPack; 1061 } 1062 1063 bool isCanonicalUnqualified() const { 1064 return CanonicalType.getTypePtr() == this; 1065 } 1066 1067 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1068 /// object types, function types, and incomplete types. 1069 1070 /// isIncompleteType - Return true if this is an incomplete type. 1071 /// A type that can describe objects, but which lacks information needed to 1072 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1073 /// routine will need to determine if the size is actually required. 1074 bool isIncompleteType() const; 1075 1076 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1077 /// type, in other words, not a function type. 1078 bool isIncompleteOrObjectType() const { 1079 return !isFunctionType(); 1080 } 1081 1082 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1083 bool isPODType() const; 1084 1085 /// isLiteralType - Return true if this is a literal type 1086 /// (C++0x [basic.types]p10) 1087 bool isLiteralType() const; 1088 1089 /// Helper methods to distinguish type categories. All type predicates 1090 /// operate on the canonical type, ignoring typedefs and qualifiers. 1091 1092 /// isBuiltinType - returns true if the type is a builtin type. 1093 bool isBuiltinType() const; 1094 1095 /// isSpecificBuiltinType - Test for a particular builtin type. 1096 bool isSpecificBuiltinType(unsigned K) const; 1097 1098 /// isPlaceholderType - Test for a type which does not represent an 1099 /// actual type-system type but is instead used as a placeholder for 1100 /// various convenient purposes within Clang. All such types are 1101 /// BuiltinTypes. 1102 bool isPlaceholderType() const; 1103 1104 /// isIntegerType() does *not* include complex integers (a GCC extension). 1105 /// isComplexIntegerType() can be used to test for complex integers. 1106 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1107 bool isEnumeralType() const; 1108 bool isBooleanType() const; 1109 bool isCharType() const; 1110 bool isWideCharType() const; 1111 bool isAnyCharacterType() const; 1112 bool isIntegralType(ASTContext &Ctx) const; 1113 1114 /// \brief Determine whether this type is an integral or enumeration type. 1115 bool isIntegralOrEnumerationType() const; 1116 /// \brief Determine whether this type is an integral or unscoped enumeration 1117 /// type. 1118 bool isIntegralOrUnscopedEnumerationType() const; 1119 1120 /// Floating point categories. 1121 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1122 /// isComplexType() does *not* include complex integers (a GCC extension). 1123 /// isComplexIntegerType() can be used to test for complex integers. 1124 bool isComplexType() const; // C99 6.2.5p11 (complex) 1125 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1126 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1127 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1128 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1129 bool isVoidType() const; // C99 6.2.5p19 1130 bool isDerivedType() const; // C99 6.2.5p20 1131 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1132 bool isAggregateType() const; 1133 1134 // Type Predicates: Check to see if this type is structurally the specified 1135 // type, ignoring typedefs and qualifiers. 1136 bool isFunctionType() const; 1137 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1138 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1139 bool isPointerType() const; 1140 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1141 bool isBlockPointerType() const; 1142 bool isVoidPointerType() const; 1143 bool isReferenceType() const; 1144 bool isLValueReferenceType() const; 1145 bool isRValueReferenceType() const; 1146 bool isFunctionPointerType() const; 1147 bool isMemberPointerType() const; 1148 bool isMemberFunctionPointerType() const; 1149 bool isMemberDataPointerType() const; 1150 bool isArrayType() const; 1151 bool isConstantArrayType() const; 1152 bool isIncompleteArrayType() const; 1153 bool isVariableArrayType() const; 1154 bool isDependentSizedArrayType() const; 1155 bool isRecordType() const; 1156 bool isClassType() const; 1157 bool isStructureType() const; 1158 bool isStructureOrClassType() const; 1159 bool isUnionType() const; 1160 bool isComplexIntegerType() const; // GCC _Complex integer type. 1161 bool isVectorType() const; // GCC vector type. 1162 bool isExtVectorType() const; // Extended vector type. 1163 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1164 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1165 // for the common case. 1166 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1167 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1168 bool isObjCQualifiedIdType() const; // id<foo> 1169 bool isObjCQualifiedClassType() const; // Class<foo> 1170 bool isObjCObjectOrInterfaceType() const; 1171 bool isObjCIdType() const; // id 1172 bool isObjCClassType() const; // Class 1173 bool isObjCSelType() const; // Class 1174 bool isObjCBuiltinType() const; // 'id' or 'Class' 1175 bool isTemplateTypeParmType() const; // C++ template type parameter 1176 bool isNullPtrType() const; // C++0x nullptr_t 1177 1178 enum ScalarTypeKind { 1179 STK_Pointer, 1180 STK_MemberPointer, 1181 STK_Bool, 1182 STK_Integral, 1183 STK_Floating, 1184 STK_IntegralComplex, 1185 STK_FloatingComplex 1186 }; 1187 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1188 ScalarTypeKind getScalarTypeKind() const; 1189 1190 /// isDependentType - Whether this type is a dependent type, meaning 1191 /// that its definition somehow depends on a template parameter 1192 /// (C++ [temp.dep.type]). 1193 bool isDependentType() const { return TypeBits.Dependent; } 1194 1195 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1196 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1197 1198 /// \brief Whether this type is or contains a local or unnamed type. 1199 bool hasUnnamedOrLocalType() const; 1200 1201 bool isOverloadableType() const; 1202 1203 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1204 bool isElaboratedTypeSpecifier() const; 1205 1206 /// hasPointerRepresentation - Whether this type is represented 1207 /// natively as a pointer; this includes pointers, references, block 1208 /// pointers, and Objective-C interface, qualified id, and qualified 1209 /// interface types, as well as nullptr_t. 1210 bool hasPointerRepresentation() const; 1211 1212 /// hasObjCPointerRepresentation - Whether this type can represent 1213 /// an objective pointer type for the purpose of GC'ability 1214 bool hasObjCPointerRepresentation() const; 1215 1216 /// \brief Determine whether this type has an integer representation 1217 /// of some sort, e.g., it is an integer type or a vector. 1218 bool hasIntegerRepresentation() const; 1219 1220 /// \brief Determine whether this type has an signed integer representation 1221 /// of some sort, e.g., it is an signed integer type or a vector. 1222 bool hasSignedIntegerRepresentation() const; 1223 1224 /// \brief Determine whether this type has an unsigned integer representation 1225 /// of some sort, e.g., it is an unsigned integer type or a vector. 1226 bool hasUnsignedIntegerRepresentation() const; 1227 1228 /// \brief Determine whether this type has a floating-point representation 1229 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1230 bool hasFloatingRepresentation() const; 1231 1232 // Type Checking Functions: Check to see if this type is structurally the 1233 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1234 // the best type we can. 1235 const RecordType *getAsStructureType() const; 1236 /// NOTE: getAs*ArrayType are methods on ASTContext. 1237 const RecordType *getAsUnionType() const; 1238 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1239 // The following is a convenience method that returns an ObjCObjectPointerType 1240 // for object declared using an interface. 1241 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1242 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1243 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1244 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1245 1246 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1247 /// because the type is a RecordType or because it is the injected-class-name 1248 /// type of a class template or class template partial specialization. 1249 CXXRecordDecl *getAsCXXRecordDecl() const; 1250 1251 // Member-template getAs<specific type>'. Look through sugar for 1252 // an instance of <specific type>. This scheme will eventually 1253 // replace the specific getAsXXXX methods above. 1254 // 1255 // There are some specializations of this member template listed 1256 // immediately following this class. 1257 template <typename T> const T *getAs() const; 1258 1259 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1260 /// element type of the array, potentially with type qualifiers missing. 1261 /// This method should never be used when type qualifiers are meaningful. 1262 const Type *getArrayElementTypeNoTypeQual() const; 1263 1264 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1265 /// pointer, this returns the respective pointee. 1266 QualType getPointeeType() const; 1267 1268 /// getUnqualifiedDesugaredType() - Return the specified type with 1269 /// any "sugar" removed from the type, removing any typedefs, 1270 /// typeofs, etc., as well as any qualifiers. 1271 const Type *getUnqualifiedDesugaredType() const; 1272 1273 /// More type predicates useful for type checking/promotion 1274 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1275 1276 /// isSignedIntegerType - Return true if this is an integer type that is 1277 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1278 /// an enum decl which has a signed representation, or a vector of signed 1279 /// integer element type. 1280 bool isSignedIntegerType() const; 1281 1282 /// isUnsignedIntegerType - Return true if this is an integer type that is 1283 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1284 /// decl which has an unsigned representation, or a vector of unsigned integer 1285 /// element type. 1286 bool isUnsignedIntegerType() const; 1287 1288 /// isConstantSizeType - Return true if this is not a variable sized type, 1289 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1290 /// incomplete types. 1291 bool isConstantSizeType() const; 1292 1293 /// isSpecifierType - Returns true if this type can be represented by some 1294 /// set of type specifiers. 1295 bool isSpecifierType() const; 1296 1297 /// \brief Determine the linkage of this type. 1298 Linkage getLinkage() const; 1299 1300 /// \brief Determine the visibility of this type. 1301 Visibility getVisibility() const; 1302 1303 /// \brief Determine the linkage and visibility of this type. 1304 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1305 1306 /// \brief Note that the linkage is no longer known. 1307 void ClearLinkageCache(); 1308 1309 const char *getTypeClassName() const; 1310 1311 QualType getCanonicalTypeInternal() const { 1312 return CanonicalType; 1313 } 1314 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1315 void dump() const; 1316 static bool classof(const Type *) { return true; } 1317 1318 friend class ASTReader; 1319 friend class ASTWriter; 1320}; 1321 1322template <> inline const TypedefType *Type::getAs() const { 1323 return dyn_cast<TypedefType>(this); 1324} 1325 1326// We can do canonical leaf types faster, because we don't have to 1327// worry about preserving child type decoration. 1328#define TYPE(Class, Base) 1329#define LEAF_TYPE(Class) \ 1330template <> inline const Class##Type *Type::getAs() const { \ 1331 return dyn_cast<Class##Type>(CanonicalType); \ 1332} 1333#include "clang/AST/TypeNodes.def" 1334 1335 1336/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1337/// types are always canonical and have a literal name field. 1338class BuiltinType : public Type { 1339public: 1340 enum Kind { 1341 Void, 1342 1343 Bool, // This is bool and/or _Bool. 1344 Char_U, // This is 'char' for targets where char is unsigned. 1345 UChar, // This is explicitly qualified unsigned char. 1346 Char16, // This is 'char16_t' for C++. 1347 Char32, // This is 'char32_t' for C++. 1348 UShort, 1349 UInt, 1350 ULong, 1351 ULongLong, 1352 UInt128, // __uint128_t 1353 1354 Char_S, // This is 'char' for targets where char is signed. 1355 SChar, // This is explicitly qualified signed char. 1356 WChar, // This is 'wchar_t' for C++. 1357 Short, 1358 Int, 1359 Long, 1360 LongLong, 1361 Int128, // __int128_t 1362 1363 Float, Double, LongDouble, 1364 1365 NullPtr, // This is the type of C++0x 'nullptr'. 1366 1367 /// This represents the type of an expression whose type is 1368 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1369 /// appear in situations where the structure of the type is 1370 /// theoretically deducible. 1371 Dependent, 1372 1373 Overload, // This represents the type of an overloaded function declaration. 1374 1375 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1376 // that has not been deduced yet. 1377 1378 /// The primitive Objective C 'id' type. The type pointed to by the 1379 /// user-visible 'id' type. Only ever shows up in an AST as the base 1380 /// type of an ObjCObjectType. 1381 ObjCId, 1382 1383 /// The primitive Objective C 'Class' type. The type pointed to by the 1384 /// user-visible 'Class' type. Only ever shows up in an AST as the 1385 /// base type of an ObjCObjectType. 1386 ObjCClass, 1387 1388 ObjCSel // This represents the ObjC 'SEL' type. 1389 }; 1390 1391public: 1392 BuiltinType(Kind K) 1393 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1394 /*VariablyModified=*/false, 1395 /*Unexpanded paramter pack=*/false) { 1396 BuiltinTypeBits.Kind = K; 1397 } 1398 1399 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1400 const char *getName(const LangOptions &LO) const; 1401 1402 bool isSugared() const { return false; } 1403 QualType desugar() const { return QualType(this, 0); } 1404 1405 bool isInteger() const { 1406 return getKind() >= Bool && getKind() <= Int128; 1407 } 1408 1409 bool isSignedInteger() const { 1410 return getKind() >= Char_S && getKind() <= Int128; 1411 } 1412 1413 bool isUnsignedInteger() const { 1414 return getKind() >= Bool && getKind() <= UInt128; 1415 } 1416 1417 bool isFloatingPoint() const { 1418 return getKind() >= Float && getKind() <= LongDouble; 1419 } 1420 1421 /// Determines whether this type is a "forbidden" placeholder type, 1422 /// i.e. a type which cannot appear in arbitrary positions in a 1423 /// fully-formed expression. 1424 bool isPlaceholderType() const { 1425 return getKind() == Overload || 1426 getKind() == UndeducedAuto; 1427 } 1428 1429 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1430 static bool classof(const BuiltinType *) { return true; } 1431}; 1432 1433/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1434/// types (_Complex float etc) as well as the GCC integer complex extensions. 1435/// 1436class ComplexType : public Type, public llvm::FoldingSetNode { 1437 QualType ElementType; 1438 ComplexType(QualType Element, QualType CanonicalPtr) : 1439 Type(Complex, CanonicalPtr, Element->isDependentType(), 1440 Element->isVariablyModifiedType(), 1441 Element->containsUnexpandedParameterPack()), 1442 ElementType(Element) { 1443 } 1444 friend class ASTContext; // ASTContext creates these. 1445 1446public: 1447 QualType getElementType() const { return ElementType; } 1448 1449 bool isSugared() const { return false; } 1450 QualType desugar() const { return QualType(this, 0); } 1451 1452 void Profile(llvm::FoldingSetNodeID &ID) { 1453 Profile(ID, getElementType()); 1454 } 1455 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1456 ID.AddPointer(Element.getAsOpaquePtr()); 1457 } 1458 1459 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1460 static bool classof(const ComplexType *) { return true; } 1461}; 1462 1463/// ParenType - Sugar for parentheses used when specifying types. 1464/// 1465class ParenType : public Type, public llvm::FoldingSetNode { 1466 QualType Inner; 1467 1468 ParenType(QualType InnerType, QualType CanonType) : 1469 Type(Paren, CanonType, InnerType->isDependentType(), 1470 InnerType->isVariablyModifiedType(), 1471 InnerType->containsUnexpandedParameterPack()), 1472 Inner(InnerType) { 1473 } 1474 friend class ASTContext; // ASTContext creates these. 1475 1476public: 1477 1478 QualType getInnerType() const { return Inner; } 1479 1480 bool isSugared() const { return true; } 1481 QualType desugar() const { return getInnerType(); } 1482 1483 void Profile(llvm::FoldingSetNodeID &ID) { 1484 Profile(ID, getInnerType()); 1485 } 1486 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1487 Inner.Profile(ID); 1488 } 1489 1490 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1491 static bool classof(const ParenType *) { return true; } 1492}; 1493 1494/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1495/// 1496class PointerType : public Type, public llvm::FoldingSetNode { 1497 QualType PointeeType; 1498 1499 PointerType(QualType Pointee, QualType CanonicalPtr) : 1500 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1501 Pointee->isVariablyModifiedType(), 1502 Pointee->containsUnexpandedParameterPack()), 1503 PointeeType(Pointee) { 1504 } 1505 friend class ASTContext; // ASTContext creates these. 1506 1507public: 1508 1509 QualType getPointeeType() const { return PointeeType; } 1510 1511 bool isSugared() const { return false; } 1512 QualType desugar() const { return QualType(this, 0); } 1513 1514 void Profile(llvm::FoldingSetNodeID &ID) { 1515 Profile(ID, getPointeeType()); 1516 } 1517 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1518 ID.AddPointer(Pointee.getAsOpaquePtr()); 1519 } 1520 1521 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1522 static bool classof(const PointerType *) { return true; } 1523}; 1524 1525/// BlockPointerType - pointer to a block type. 1526/// This type is to represent types syntactically represented as 1527/// "void (^)(int)", etc. Pointee is required to always be a function type. 1528/// 1529class BlockPointerType : public Type, public llvm::FoldingSetNode { 1530 QualType PointeeType; // Block is some kind of pointer type 1531 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1532 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1533 Pointee->isVariablyModifiedType(), 1534 Pointee->containsUnexpandedParameterPack()), 1535 PointeeType(Pointee) { 1536 } 1537 friend class ASTContext; // ASTContext creates these. 1538 1539public: 1540 1541 // Get the pointee type. Pointee is required to always be a function type. 1542 QualType getPointeeType() const { return PointeeType; } 1543 1544 bool isSugared() const { return false; } 1545 QualType desugar() const { return QualType(this, 0); } 1546 1547 void Profile(llvm::FoldingSetNodeID &ID) { 1548 Profile(ID, getPointeeType()); 1549 } 1550 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1551 ID.AddPointer(Pointee.getAsOpaquePtr()); 1552 } 1553 1554 static bool classof(const Type *T) { 1555 return T->getTypeClass() == BlockPointer; 1556 } 1557 static bool classof(const BlockPointerType *) { return true; } 1558}; 1559 1560/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1561/// 1562class ReferenceType : public Type, public llvm::FoldingSetNode { 1563 QualType PointeeType; 1564 1565protected: 1566 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1567 bool SpelledAsLValue) : 1568 Type(tc, CanonicalRef, Referencee->isDependentType(), 1569 Referencee->isVariablyModifiedType(), 1570 Referencee->containsUnexpandedParameterPack()), 1571 PointeeType(Referencee) 1572 { 1573 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1574 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1575 } 1576 1577public: 1578 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1579 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1580 1581 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1582 QualType getPointeeType() const { 1583 // FIXME: this might strip inner qualifiers; okay? 1584 const ReferenceType *T = this; 1585 while (T->isInnerRef()) 1586 T = T->PointeeType->getAs<ReferenceType>(); 1587 return T->PointeeType; 1588 } 1589 1590 void Profile(llvm::FoldingSetNodeID &ID) { 1591 Profile(ID, PointeeType, isSpelledAsLValue()); 1592 } 1593 static void Profile(llvm::FoldingSetNodeID &ID, 1594 QualType Referencee, 1595 bool SpelledAsLValue) { 1596 ID.AddPointer(Referencee.getAsOpaquePtr()); 1597 ID.AddBoolean(SpelledAsLValue); 1598 } 1599 1600 static bool classof(const Type *T) { 1601 return T->getTypeClass() == LValueReference || 1602 T->getTypeClass() == RValueReference; 1603 } 1604 static bool classof(const ReferenceType *) { return true; } 1605}; 1606 1607/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1608/// 1609class LValueReferenceType : public ReferenceType { 1610 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1611 bool SpelledAsLValue) : 1612 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1613 {} 1614 friend class ASTContext; // ASTContext creates these 1615public: 1616 bool isSugared() const { return false; } 1617 QualType desugar() const { return QualType(this, 0); } 1618 1619 static bool classof(const Type *T) { 1620 return T->getTypeClass() == LValueReference; 1621 } 1622 static bool classof(const LValueReferenceType *) { return true; } 1623}; 1624 1625/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1626/// 1627class RValueReferenceType : public ReferenceType { 1628 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1629 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1630 } 1631 friend class ASTContext; // ASTContext creates these 1632public: 1633 bool isSugared() const { return false; } 1634 QualType desugar() const { return QualType(this, 0); } 1635 1636 static bool classof(const Type *T) { 1637 return T->getTypeClass() == RValueReference; 1638 } 1639 static bool classof(const RValueReferenceType *) { return true; } 1640}; 1641 1642/// MemberPointerType - C++ 8.3.3 - Pointers to members 1643/// 1644class MemberPointerType : public Type, public llvm::FoldingSetNode { 1645 QualType PointeeType; 1646 /// The class of which the pointee is a member. Must ultimately be a 1647 /// RecordType, but could be a typedef or a template parameter too. 1648 const Type *Class; 1649 1650 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1651 Type(MemberPointer, CanonicalPtr, 1652 Cls->isDependentType() || Pointee->isDependentType(), 1653 Pointee->isVariablyModifiedType(), 1654 (Cls->containsUnexpandedParameterPack() || 1655 Pointee->containsUnexpandedParameterPack())), 1656 PointeeType(Pointee), Class(Cls) { 1657 } 1658 friend class ASTContext; // ASTContext creates these. 1659 1660public: 1661 QualType getPointeeType() const { return PointeeType; } 1662 1663 /// Returns true if the member type (i.e. the pointee type) is a 1664 /// function type rather than a data-member type. 1665 bool isMemberFunctionPointer() const { 1666 return PointeeType->isFunctionProtoType(); 1667 } 1668 1669 /// Returns true if the member type (i.e. the pointee type) is a 1670 /// data type rather than a function type. 1671 bool isMemberDataPointer() const { 1672 return !PointeeType->isFunctionProtoType(); 1673 } 1674 1675 const Type *getClass() const { return Class; } 1676 1677 bool isSugared() const { return false; } 1678 QualType desugar() const { return QualType(this, 0); } 1679 1680 void Profile(llvm::FoldingSetNodeID &ID) { 1681 Profile(ID, getPointeeType(), getClass()); 1682 } 1683 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1684 const Type *Class) { 1685 ID.AddPointer(Pointee.getAsOpaquePtr()); 1686 ID.AddPointer(Class); 1687 } 1688 1689 static bool classof(const Type *T) { 1690 return T->getTypeClass() == MemberPointer; 1691 } 1692 static bool classof(const MemberPointerType *) { return true; } 1693}; 1694 1695/// ArrayType - C99 6.7.5.2 - Array Declarators. 1696/// 1697class ArrayType : public Type, public llvm::FoldingSetNode { 1698public: 1699 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1700 /// an array with a static size (e.g. int X[static 4]), or an array 1701 /// with a star size (e.g. int X[*]). 1702 /// 'static' is only allowed on function parameters. 1703 enum ArraySizeModifier { 1704 Normal, Static, Star 1705 }; 1706private: 1707 /// ElementType - The element type of the array. 1708 QualType ElementType; 1709 1710protected: 1711 // C++ [temp.dep.type]p1: 1712 // A type is dependent if it is... 1713 // - an array type constructed from any dependent type or whose 1714 // size is specified by a constant expression that is 1715 // value-dependent, 1716 ArrayType(TypeClass tc, QualType et, QualType can, 1717 ArraySizeModifier sm, unsigned tq, 1718 bool ContainsUnexpandedParameterPack) 1719 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1720 (tc == VariableArray || et->isVariablyModifiedType()), 1721 ContainsUnexpandedParameterPack), 1722 ElementType(et) { 1723 ArrayTypeBits.IndexTypeQuals = tq; 1724 ArrayTypeBits.SizeModifier = sm; 1725 } 1726 1727 friend class ASTContext; // ASTContext creates these. 1728 1729public: 1730 QualType getElementType() const { return ElementType; } 1731 ArraySizeModifier getSizeModifier() const { 1732 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1733 } 1734 Qualifiers getIndexTypeQualifiers() const { 1735 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1736 } 1737 unsigned getIndexTypeCVRQualifiers() const { 1738 return ArrayTypeBits.IndexTypeQuals; 1739 } 1740 1741 static bool classof(const Type *T) { 1742 return T->getTypeClass() == ConstantArray || 1743 T->getTypeClass() == VariableArray || 1744 T->getTypeClass() == IncompleteArray || 1745 T->getTypeClass() == DependentSizedArray; 1746 } 1747 static bool classof(const ArrayType *) { return true; } 1748}; 1749 1750/// ConstantArrayType - This class represents the canonical version of 1751/// C arrays with a specified constant size. For example, the canonical 1752/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1753/// type is 'int' and the size is 404. 1754class ConstantArrayType : public ArrayType { 1755 llvm::APInt Size; // Allows us to unique the type. 1756 1757 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1758 ArraySizeModifier sm, unsigned tq) 1759 : ArrayType(ConstantArray, et, can, sm, tq, 1760 et->containsUnexpandedParameterPack()), 1761 Size(size) {} 1762protected: 1763 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1764 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1765 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1766 Size(size) {} 1767 friend class ASTContext; // ASTContext creates these. 1768public: 1769 const llvm::APInt &getSize() const { return Size; } 1770 bool isSugared() const { return false; } 1771 QualType desugar() const { return QualType(this, 0); } 1772 1773 1774 /// \brief Determine the number of bits required to address a member of 1775 // an array with the given element type and number of elements. 1776 static unsigned getNumAddressingBits(ASTContext &Context, 1777 QualType ElementType, 1778 const llvm::APInt &NumElements); 1779 1780 /// \brief Determine the maximum number of active bits that an array's size 1781 /// can require, which limits the maximum size of the array. 1782 static unsigned getMaxSizeBits(ASTContext &Context); 1783 1784 void Profile(llvm::FoldingSetNodeID &ID) { 1785 Profile(ID, getElementType(), getSize(), 1786 getSizeModifier(), getIndexTypeCVRQualifiers()); 1787 } 1788 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1789 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1790 unsigned TypeQuals) { 1791 ID.AddPointer(ET.getAsOpaquePtr()); 1792 ID.AddInteger(ArraySize.getZExtValue()); 1793 ID.AddInteger(SizeMod); 1794 ID.AddInteger(TypeQuals); 1795 } 1796 static bool classof(const Type *T) { 1797 return T->getTypeClass() == ConstantArray; 1798 } 1799 static bool classof(const ConstantArrayType *) { return true; } 1800}; 1801 1802/// IncompleteArrayType - This class represents C arrays with an unspecified 1803/// size. For example 'int A[]' has an IncompleteArrayType where the element 1804/// type is 'int' and the size is unspecified. 1805class IncompleteArrayType : public ArrayType { 1806 1807 IncompleteArrayType(QualType et, QualType can, 1808 ArraySizeModifier sm, unsigned tq) 1809 : ArrayType(IncompleteArray, et, can, sm, tq, 1810 et->containsUnexpandedParameterPack()) {} 1811 friend class ASTContext; // ASTContext creates these. 1812public: 1813 bool isSugared() const { return false; } 1814 QualType desugar() const { return QualType(this, 0); } 1815 1816 static bool classof(const Type *T) { 1817 return T->getTypeClass() == IncompleteArray; 1818 } 1819 static bool classof(const IncompleteArrayType *) { return true; } 1820 1821 friend class StmtIteratorBase; 1822 1823 void Profile(llvm::FoldingSetNodeID &ID) { 1824 Profile(ID, getElementType(), getSizeModifier(), 1825 getIndexTypeCVRQualifiers()); 1826 } 1827 1828 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1829 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1830 ID.AddPointer(ET.getAsOpaquePtr()); 1831 ID.AddInteger(SizeMod); 1832 ID.AddInteger(TypeQuals); 1833 } 1834}; 1835 1836/// VariableArrayType - This class represents C arrays with a specified size 1837/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1838/// Since the size expression is an arbitrary expression, we store it as such. 1839/// 1840/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1841/// should not be: two lexically equivalent variable array types could mean 1842/// different things, for example, these variables do not have the same type 1843/// dynamically: 1844/// 1845/// void foo(int x) { 1846/// int Y[x]; 1847/// ++x; 1848/// int Z[x]; 1849/// } 1850/// 1851class VariableArrayType : public ArrayType { 1852 /// SizeExpr - An assignment expression. VLA's are only permitted within 1853 /// a function block. 1854 Stmt *SizeExpr; 1855 /// Brackets - The left and right array brackets. 1856 SourceRange Brackets; 1857 1858 VariableArrayType(QualType et, QualType can, Expr *e, 1859 ArraySizeModifier sm, unsigned tq, 1860 SourceRange brackets) 1861 : ArrayType(VariableArray, et, can, sm, tq, 1862 et->containsUnexpandedParameterPack()), 1863 SizeExpr((Stmt*) e), Brackets(brackets) {} 1864 friend class ASTContext; // ASTContext creates these. 1865 1866public: 1867 Expr *getSizeExpr() const { 1868 // We use C-style casts instead of cast<> here because we do not wish 1869 // to have a dependency of Type.h on Stmt.h/Expr.h. 1870 return (Expr*) SizeExpr; 1871 } 1872 SourceRange getBracketsRange() const { return Brackets; } 1873 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1874 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1875 1876 bool isSugared() const { return false; } 1877 QualType desugar() const { return QualType(this, 0); } 1878 1879 static bool classof(const Type *T) { 1880 return T->getTypeClass() == VariableArray; 1881 } 1882 static bool classof(const VariableArrayType *) { return true; } 1883 1884 friend class StmtIteratorBase; 1885 1886 void Profile(llvm::FoldingSetNodeID &ID) { 1887 assert(0 && "Cannnot unique VariableArrayTypes."); 1888 } 1889}; 1890 1891/// DependentSizedArrayType - This type represents an array type in 1892/// C++ whose size is a value-dependent expression. For example: 1893/// 1894/// \code 1895/// template<typename T, int Size> 1896/// class array { 1897/// T data[Size]; 1898/// }; 1899/// \endcode 1900/// 1901/// For these types, we won't actually know what the array bound is 1902/// until template instantiation occurs, at which point this will 1903/// become either a ConstantArrayType or a VariableArrayType. 1904class DependentSizedArrayType : public ArrayType { 1905 ASTContext &Context; 1906 1907 /// \brief An assignment expression that will instantiate to the 1908 /// size of the array. 1909 /// 1910 /// The expression itself might be NULL, in which case the array 1911 /// type will have its size deduced from an initializer. 1912 Stmt *SizeExpr; 1913 1914 /// Brackets - The left and right array brackets. 1915 SourceRange Brackets; 1916 1917 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1918 Expr *e, ArraySizeModifier sm, unsigned tq, 1919 SourceRange brackets); 1920 1921 friend class ASTContext; // ASTContext creates these. 1922 1923public: 1924 Expr *getSizeExpr() const { 1925 // We use C-style casts instead of cast<> here because we do not wish 1926 // to have a dependency of Type.h on Stmt.h/Expr.h. 1927 return (Expr*) SizeExpr; 1928 } 1929 SourceRange getBracketsRange() const { return Brackets; } 1930 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1931 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1932 1933 bool isSugared() const { return false; } 1934 QualType desugar() const { return QualType(this, 0); } 1935 1936 static bool classof(const Type *T) { 1937 return T->getTypeClass() == DependentSizedArray; 1938 } 1939 static bool classof(const DependentSizedArrayType *) { return true; } 1940 1941 friend class StmtIteratorBase; 1942 1943 1944 void Profile(llvm::FoldingSetNodeID &ID) { 1945 Profile(ID, Context, getElementType(), 1946 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1947 } 1948 1949 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1950 QualType ET, ArraySizeModifier SizeMod, 1951 unsigned TypeQuals, Expr *E); 1952}; 1953 1954/// DependentSizedExtVectorType - This type represent an extended vector type 1955/// where either the type or size is dependent. For example: 1956/// @code 1957/// template<typename T, int Size> 1958/// class vector { 1959/// typedef T __attribute__((ext_vector_type(Size))) type; 1960/// } 1961/// @endcode 1962class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1963 ASTContext &Context; 1964 Expr *SizeExpr; 1965 /// ElementType - The element type of the array. 1966 QualType ElementType; 1967 SourceLocation loc; 1968 1969 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1970 QualType can, Expr *SizeExpr, SourceLocation loc); 1971 1972 friend class ASTContext; 1973 1974public: 1975 Expr *getSizeExpr() const { return SizeExpr; } 1976 QualType getElementType() const { return ElementType; } 1977 SourceLocation getAttributeLoc() const { return loc; } 1978 1979 bool isSugared() const { return false; } 1980 QualType desugar() const { return QualType(this, 0); } 1981 1982 static bool classof(const Type *T) { 1983 return T->getTypeClass() == DependentSizedExtVector; 1984 } 1985 static bool classof(const DependentSizedExtVectorType *) { return true; } 1986 1987 void Profile(llvm::FoldingSetNodeID &ID) { 1988 Profile(ID, Context, getElementType(), getSizeExpr()); 1989 } 1990 1991 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1992 QualType ElementType, Expr *SizeExpr); 1993}; 1994 1995 1996/// VectorType - GCC generic vector type. This type is created using 1997/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1998/// bytes; or from an Altivec __vector or vector declaration. 1999/// Since the constructor takes the number of vector elements, the 2000/// client is responsible for converting the size into the number of elements. 2001class VectorType : public Type, public llvm::FoldingSetNode { 2002public: 2003 enum VectorKind { 2004 GenericVector, // not a target-specific vector type 2005 AltiVecVector, // is AltiVec vector 2006 AltiVecPixel, // is AltiVec 'vector Pixel' 2007 AltiVecBool, // is AltiVec 'vector bool ...' 2008 NeonVector, // is ARM Neon vector 2009 NeonPolyVector // is ARM Neon polynomial vector 2010 }; 2011protected: 2012 /// ElementType - The element type of the vector. 2013 QualType ElementType; 2014 2015 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2016 VectorKind vecKind); 2017 2018 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2019 QualType canonType, VectorKind vecKind); 2020 2021 friend class ASTContext; // ASTContext creates these. 2022 2023public: 2024 2025 QualType getElementType() const { return ElementType; } 2026 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2027 2028 bool isSugared() const { return false; } 2029 QualType desugar() const { return QualType(this, 0); } 2030 2031 VectorKind getVectorKind() const { 2032 return VectorKind(VectorTypeBits.VecKind); 2033 } 2034 2035 void Profile(llvm::FoldingSetNodeID &ID) { 2036 Profile(ID, getElementType(), getNumElements(), 2037 getTypeClass(), getVectorKind()); 2038 } 2039 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2040 unsigned NumElements, TypeClass TypeClass, 2041 VectorKind VecKind) { 2042 ID.AddPointer(ElementType.getAsOpaquePtr()); 2043 ID.AddInteger(NumElements); 2044 ID.AddInteger(TypeClass); 2045 ID.AddInteger(VecKind); 2046 } 2047 2048 static bool classof(const Type *T) { 2049 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2050 } 2051 static bool classof(const VectorType *) { return true; } 2052}; 2053 2054/// ExtVectorType - Extended vector type. This type is created using 2055/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2056/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2057/// class enables syntactic extensions, like Vector Components for accessing 2058/// points, colors, and textures (modeled after OpenGL Shading Language). 2059class ExtVectorType : public VectorType { 2060 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2061 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2062 friend class ASTContext; // ASTContext creates these. 2063public: 2064 static int getPointAccessorIdx(char c) { 2065 switch (c) { 2066 default: return -1; 2067 case 'x': return 0; 2068 case 'y': return 1; 2069 case 'z': return 2; 2070 case 'w': return 3; 2071 } 2072 } 2073 static int getNumericAccessorIdx(char c) { 2074 switch (c) { 2075 default: return -1; 2076 case '0': return 0; 2077 case '1': return 1; 2078 case '2': return 2; 2079 case '3': return 3; 2080 case '4': return 4; 2081 case '5': return 5; 2082 case '6': return 6; 2083 case '7': return 7; 2084 case '8': return 8; 2085 case '9': return 9; 2086 case 'A': 2087 case 'a': return 10; 2088 case 'B': 2089 case 'b': return 11; 2090 case 'C': 2091 case 'c': return 12; 2092 case 'D': 2093 case 'd': return 13; 2094 case 'E': 2095 case 'e': return 14; 2096 case 'F': 2097 case 'f': return 15; 2098 } 2099 } 2100 2101 static int getAccessorIdx(char c) { 2102 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2103 return getNumericAccessorIdx(c); 2104 } 2105 2106 bool isAccessorWithinNumElements(char c) const { 2107 if (int idx = getAccessorIdx(c)+1) 2108 return unsigned(idx-1) < getNumElements(); 2109 return false; 2110 } 2111 bool isSugared() const { return false; } 2112 QualType desugar() const { return QualType(this, 0); } 2113 2114 static bool classof(const Type *T) { 2115 return T->getTypeClass() == ExtVector; 2116 } 2117 static bool classof(const ExtVectorType *) { return true; } 2118}; 2119 2120/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2121/// class of FunctionNoProtoType and FunctionProtoType. 2122/// 2123class FunctionType : public Type { 2124 // The type returned by the function. 2125 QualType ResultType; 2126 2127 public: 2128 // This class is used for passing around the information needed to 2129 // construct a call. It is not actually used for storage, just for 2130 // factoring together common arguments. 2131 // If you add a field (say Foo), other than the obvious places (both, 2132 // constructors, compile failures), what you need to update is 2133 // * Operator== 2134 // * getFoo 2135 // * withFoo 2136 // * functionType. Add Foo, getFoo. 2137 // * ASTContext::getFooType 2138 // * ASTContext::mergeFunctionTypes 2139 // * FunctionNoProtoType::Profile 2140 // * FunctionProtoType::Profile 2141 // * TypePrinter::PrintFunctionProto 2142 // * AST read and write 2143 // * Codegen 2144 2145 class ExtInfo { 2146 enum { CallConvMask = 0x7 }; 2147 enum { NoReturnMask = 0x8 }; 2148 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2149 RegParmOffset = 4 }; 2150 2151 unsigned Bits; 2152 2153 ExtInfo(unsigned Bits) : Bits(Bits) {} 2154 2155 friend class FunctionType; 2156 2157 public: 2158 // Constructor with no defaults. Use this when you know that you 2159 // have all the elements (when reading an AST file for example). 2160 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2161 Bits = ((unsigned) cc) | 2162 (noReturn ? NoReturnMask : 0) | 2163 (regParm << RegParmOffset); 2164 } 2165 2166 // Constructor with all defaults. Use when for example creating a 2167 // function know to use defaults. 2168 ExtInfo() : Bits(0) {} 2169 2170 bool getNoReturn() const { return Bits & NoReturnMask; } 2171 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2172 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2173 2174 bool operator==(ExtInfo Other) const { 2175 return Bits == Other.Bits; 2176 } 2177 bool operator!=(ExtInfo Other) const { 2178 return Bits != Other.Bits; 2179 } 2180 2181 // Note that we don't have setters. That is by design, use 2182 // the following with methods instead of mutating these objects. 2183 2184 ExtInfo withNoReturn(bool noReturn) const { 2185 if (noReturn) 2186 return ExtInfo(Bits | NoReturnMask); 2187 else 2188 return ExtInfo(Bits & ~NoReturnMask); 2189 } 2190 2191 ExtInfo withRegParm(unsigned RegParm) const { 2192 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2193 } 2194 2195 ExtInfo withCallingConv(CallingConv cc) const { 2196 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2197 } 2198 2199 void Profile(llvm::FoldingSetNodeID &ID) { 2200 ID.AddInteger(Bits); 2201 } 2202 }; 2203 2204protected: 2205 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 2206 unsigned typeQuals, QualType Canonical, bool Dependent, 2207 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2208 ExtInfo Info) 2209 : Type(tc, Canonical, Dependent, VariablyModified, 2210 ContainsUnexpandedParameterPack), 2211 ResultType(res) { 2212 FunctionTypeBits.ExtInfo = Info.Bits; 2213 FunctionTypeBits.SubclassInfo = SubclassInfo; 2214 FunctionTypeBits.TypeQuals = typeQuals; 2215 } 2216 bool getSubClassData() const { return FunctionTypeBits.SubclassInfo; } 2217 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2218public: 2219 2220 QualType getResultType() const { return ResultType; } 2221 2222 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2223 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2224 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2225 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2226 2227 /// \brief Determine the type of an expression that calls a function of 2228 /// this type. 2229 QualType getCallResultType(ASTContext &Context) const { 2230 return getResultType().getNonLValueExprType(Context); 2231 } 2232 2233 static llvm::StringRef getNameForCallConv(CallingConv CC); 2234 2235 static bool classof(const Type *T) { 2236 return T->getTypeClass() == FunctionNoProto || 2237 T->getTypeClass() == FunctionProto; 2238 } 2239 static bool classof(const FunctionType *) { return true; } 2240}; 2241 2242/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2243/// no information available about its arguments. 2244class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2245 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2246 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2247 /*Dependent=*/false, Result->isVariablyModifiedType(), 2248 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2249 2250 friend class ASTContext; // ASTContext creates these. 2251 2252public: 2253 // No additional state past what FunctionType provides. 2254 2255 bool isSugared() const { return false; } 2256 QualType desugar() const { return QualType(this, 0); } 2257 2258 void Profile(llvm::FoldingSetNodeID &ID) { 2259 Profile(ID, getResultType(), getExtInfo()); 2260 } 2261 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2262 ExtInfo Info) { 2263 Info.Profile(ID); 2264 ID.AddPointer(ResultType.getAsOpaquePtr()); 2265 } 2266 2267 static bool classof(const Type *T) { 2268 return T->getTypeClass() == FunctionNoProto; 2269 } 2270 static bool classof(const FunctionNoProtoType *) { return true; } 2271}; 2272 2273/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2274/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2275/// arguments, not as having a single void argument. Such a type can have an 2276/// exception specification, but this specification is not part of the canonical 2277/// type. 2278class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2279 /// \brief Determine whether there are any argument types that 2280 /// contain an unexpanded parameter pack. 2281 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2282 unsigned numArgs) { 2283 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2284 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2285 return true; 2286 2287 return false; 2288 } 2289 2290 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2291 bool isVariadic, unsigned typeQuals, bool hasExs, 2292 bool hasAnyExs, const QualType *ExArray, 2293 unsigned numExs, QualType Canonical, 2294 const ExtInfo &Info); 2295 2296 /// NumArgs - The number of arguments this function has, not counting '...'. 2297 unsigned NumArgs : 20; 2298 2299 /// NumExceptions - The number of types in the exception spec, if any. 2300 unsigned NumExceptions : 10; 2301 2302 /// HasExceptionSpec - Whether this function has an exception spec at all. 2303 unsigned HasExceptionSpec : 1; 2304 2305 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2306 unsigned AnyExceptionSpec : 1; 2307 2308 /// ArgInfo - There is an variable size array after the class in memory that 2309 /// holds the argument types. 2310 2311 /// Exceptions - There is another variable size array after ArgInfo that 2312 /// holds the exception types. 2313 2314 friend class ASTContext; // ASTContext creates these. 2315 2316public: 2317 unsigned getNumArgs() const { return NumArgs; } 2318 QualType getArgType(unsigned i) const { 2319 assert(i < NumArgs && "Invalid argument number!"); 2320 return arg_type_begin()[i]; 2321 } 2322 2323 bool hasExceptionSpec() const { return HasExceptionSpec; } 2324 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2325 unsigned getNumExceptions() const { return NumExceptions; } 2326 QualType getExceptionType(unsigned i) const { 2327 assert(i < NumExceptions && "Invalid exception number!"); 2328 return exception_begin()[i]; 2329 } 2330 bool hasEmptyExceptionSpec() const { 2331 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2332 getNumExceptions() == 0; 2333 } 2334 2335 bool isVariadic() const { return getSubClassData(); } 2336 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2337 2338 typedef const QualType *arg_type_iterator; 2339 arg_type_iterator arg_type_begin() const { 2340 return reinterpret_cast<const QualType *>(this+1); 2341 } 2342 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2343 2344 typedef const QualType *exception_iterator; 2345 exception_iterator exception_begin() const { 2346 // exceptions begin where arguments end 2347 return arg_type_end(); 2348 } 2349 exception_iterator exception_end() const { 2350 return exception_begin() + NumExceptions; 2351 } 2352 2353 bool isSugared() const { return false; } 2354 QualType desugar() const { return QualType(this, 0); } 2355 2356 static bool classof(const Type *T) { 2357 return T->getTypeClass() == FunctionProto; 2358 } 2359 static bool classof(const FunctionProtoType *) { return true; } 2360 2361 void Profile(llvm::FoldingSetNodeID &ID); 2362 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2363 arg_type_iterator ArgTys, unsigned NumArgs, 2364 bool isVariadic, unsigned TypeQuals, 2365 bool hasExceptionSpec, bool anyExceptionSpec, 2366 unsigned NumExceptions, exception_iterator Exs, 2367 ExtInfo ExtInfo); 2368}; 2369 2370 2371/// \brief Represents the dependent type named by a dependently-scoped 2372/// typename using declaration, e.g. 2373/// using typename Base<T>::foo; 2374/// Template instantiation turns these into the underlying type. 2375class UnresolvedUsingType : public Type { 2376 UnresolvedUsingTypenameDecl *Decl; 2377 2378 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2379 : Type(UnresolvedUsing, QualType(), true, false, 2380 /*ContainsUnexpandedParameterPack=*/false), 2381 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2382 friend class ASTContext; // ASTContext creates these. 2383public: 2384 2385 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2386 2387 bool isSugared() const { return false; } 2388 QualType desugar() const { return QualType(this, 0); } 2389 2390 static bool classof(const Type *T) { 2391 return T->getTypeClass() == UnresolvedUsing; 2392 } 2393 static bool classof(const UnresolvedUsingType *) { return true; } 2394 2395 void Profile(llvm::FoldingSetNodeID &ID) { 2396 return Profile(ID, Decl); 2397 } 2398 static void Profile(llvm::FoldingSetNodeID &ID, 2399 UnresolvedUsingTypenameDecl *D) { 2400 ID.AddPointer(D); 2401 } 2402}; 2403 2404 2405class TypedefType : public Type { 2406 TypedefDecl *Decl; 2407protected: 2408 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2409 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2410 /*ContainsUnexpandedParameterPack=*/false), 2411 Decl(const_cast<TypedefDecl*>(D)) { 2412 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2413 } 2414 friend class ASTContext; // ASTContext creates these. 2415public: 2416 2417 TypedefDecl *getDecl() const { return Decl; } 2418 2419 bool isSugared() const { return true; } 2420 QualType desugar() const; 2421 2422 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2423 static bool classof(const TypedefType *) { return true; } 2424}; 2425 2426/// TypeOfExprType (GCC extension). 2427class TypeOfExprType : public Type { 2428 Expr *TOExpr; 2429 2430protected: 2431 TypeOfExprType(Expr *E, QualType can = QualType()); 2432 friend class ASTContext; // ASTContext creates these. 2433public: 2434 Expr *getUnderlyingExpr() const { return TOExpr; } 2435 2436 /// \brief Remove a single level of sugar. 2437 QualType desugar() const; 2438 2439 /// \brief Returns whether this type directly provides sugar. 2440 bool isSugared() const { return true; } 2441 2442 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2443 static bool classof(const TypeOfExprType *) { return true; } 2444}; 2445 2446/// \brief Internal representation of canonical, dependent 2447/// typeof(expr) types. 2448/// 2449/// This class is used internally by the ASTContext to manage 2450/// canonical, dependent types, only. Clients will only see instances 2451/// of this class via TypeOfExprType nodes. 2452class DependentTypeOfExprType 2453 : public TypeOfExprType, public llvm::FoldingSetNode { 2454 ASTContext &Context; 2455 2456public: 2457 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2458 : TypeOfExprType(E), Context(Context) { } 2459 2460 bool isSugared() const { return false; } 2461 QualType desugar() const { return QualType(this, 0); } 2462 2463 void Profile(llvm::FoldingSetNodeID &ID) { 2464 Profile(ID, Context, getUnderlyingExpr()); 2465 } 2466 2467 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2468 Expr *E); 2469}; 2470 2471/// TypeOfType (GCC extension). 2472class TypeOfType : public Type { 2473 QualType TOType; 2474 TypeOfType(QualType T, QualType can) 2475 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2476 T->containsUnexpandedParameterPack()), 2477 TOType(T) { 2478 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2479 } 2480 friend class ASTContext; // ASTContext creates these. 2481public: 2482 QualType getUnderlyingType() const { return TOType; } 2483 2484 /// \brief Remove a single level of sugar. 2485 QualType desugar() const { return getUnderlyingType(); } 2486 2487 /// \brief Returns whether this type directly provides sugar. 2488 bool isSugared() const { return true; } 2489 2490 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2491 static bool classof(const TypeOfType *) { return true; } 2492}; 2493 2494/// DecltypeType (C++0x) 2495class DecltypeType : public Type { 2496 Expr *E; 2497 2498 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2499 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2500 // from it. 2501 QualType UnderlyingType; 2502 2503protected: 2504 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2505 friend class ASTContext; // ASTContext creates these. 2506public: 2507 Expr *getUnderlyingExpr() const { return E; } 2508 QualType getUnderlyingType() const { return UnderlyingType; } 2509 2510 /// \brief Remove a single level of sugar. 2511 QualType desugar() const { return getUnderlyingType(); } 2512 2513 /// \brief Returns whether this type directly provides sugar. 2514 bool isSugared() const { return !isDependentType(); } 2515 2516 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2517 static bool classof(const DecltypeType *) { return true; } 2518}; 2519 2520/// \brief Internal representation of canonical, dependent 2521/// decltype(expr) types. 2522/// 2523/// This class is used internally by the ASTContext to manage 2524/// canonical, dependent types, only. Clients will only see instances 2525/// of this class via DecltypeType nodes. 2526class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2527 ASTContext &Context; 2528 2529public: 2530 DependentDecltypeType(ASTContext &Context, Expr *E); 2531 2532 bool isSugared() const { return false; } 2533 QualType desugar() const { return QualType(this, 0); } 2534 2535 void Profile(llvm::FoldingSetNodeID &ID) { 2536 Profile(ID, Context, getUnderlyingExpr()); 2537 } 2538 2539 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2540 Expr *E); 2541}; 2542 2543class TagType : public Type { 2544 /// Stores the TagDecl associated with this type. The decl may point to any 2545 /// TagDecl that declares the entity. 2546 TagDecl * decl; 2547 2548protected: 2549 TagType(TypeClass TC, const TagDecl *D, QualType can); 2550 2551public: 2552 TagDecl *getDecl() const; 2553 2554 /// @brief Determines whether this type is in the process of being 2555 /// defined. 2556 bool isBeingDefined() const; 2557 2558 static bool classof(const Type *T) { 2559 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2560 } 2561 static bool classof(const TagType *) { return true; } 2562 static bool classof(const RecordType *) { return true; } 2563 static bool classof(const EnumType *) { return true; } 2564}; 2565 2566/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2567/// to detect TagType objects of structs/unions/classes. 2568class RecordType : public TagType { 2569protected: 2570 explicit RecordType(const RecordDecl *D) 2571 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2572 explicit RecordType(TypeClass TC, RecordDecl *D) 2573 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2574 friend class ASTContext; // ASTContext creates these. 2575public: 2576 2577 RecordDecl *getDecl() const { 2578 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2579 } 2580 2581 // FIXME: This predicate is a helper to QualType/Type. It needs to 2582 // recursively check all fields for const-ness. If any field is declared 2583 // const, it needs to return false. 2584 bool hasConstFields() const { return false; } 2585 2586 // FIXME: RecordType needs to check when it is created that all fields are in 2587 // the same address space, and return that. 2588 unsigned getAddressSpace() const { return 0; } 2589 2590 bool isSugared() const { return false; } 2591 QualType desugar() const { return QualType(this, 0); } 2592 2593 static bool classof(const TagType *T); 2594 static bool classof(const Type *T) { 2595 return isa<TagType>(T) && classof(cast<TagType>(T)); 2596 } 2597 static bool classof(const RecordType *) { return true; } 2598}; 2599 2600/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2601/// to detect TagType objects of enums. 2602class EnumType : public TagType { 2603 explicit EnumType(const EnumDecl *D) 2604 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2605 friend class ASTContext; // ASTContext creates these. 2606public: 2607 2608 EnumDecl *getDecl() const { 2609 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2610 } 2611 2612 bool isSugared() const { return false; } 2613 QualType desugar() const { return QualType(this, 0); } 2614 2615 static bool classof(const TagType *T); 2616 static bool classof(const Type *T) { 2617 return isa<TagType>(T) && classof(cast<TagType>(T)); 2618 } 2619 static bool classof(const EnumType *) { return true; } 2620}; 2621 2622class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2623 unsigned Depth : 15; 2624 unsigned ParameterPack : 1; 2625 unsigned Index : 16; 2626 IdentifierInfo *Name; 2627 2628 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2629 QualType Canon) 2630 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2631 /*VariablyModified=*/false, PP), 2632 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2633 2634 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2635 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2636 /*VariablyModified=*/false, PP), 2637 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2638 2639 friend class ASTContext; // ASTContext creates these 2640 2641public: 2642 unsigned getDepth() const { return Depth; } 2643 unsigned getIndex() const { return Index; } 2644 bool isParameterPack() const { return ParameterPack; } 2645 IdentifierInfo *getName() const { return Name; } 2646 2647 bool isSugared() const { return false; } 2648 QualType desugar() const { return QualType(this, 0); } 2649 2650 void Profile(llvm::FoldingSetNodeID &ID) { 2651 Profile(ID, Depth, Index, ParameterPack, Name); 2652 } 2653 2654 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2655 unsigned Index, bool ParameterPack, 2656 IdentifierInfo *Name) { 2657 ID.AddInteger(Depth); 2658 ID.AddInteger(Index); 2659 ID.AddBoolean(ParameterPack); 2660 ID.AddPointer(Name); 2661 } 2662 2663 static bool classof(const Type *T) { 2664 return T->getTypeClass() == TemplateTypeParm; 2665 } 2666 static bool classof(const TemplateTypeParmType *T) { return true; } 2667}; 2668 2669/// \brief Represents the result of substituting a type for a template 2670/// type parameter. 2671/// 2672/// Within an instantiated template, all template type parameters have 2673/// been replaced with these. They are used solely to record that a 2674/// type was originally written as a template type parameter; 2675/// therefore they are never canonical. 2676class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2677 // The original type parameter. 2678 const TemplateTypeParmType *Replaced; 2679 2680 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2681 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2682 Canon->isVariablyModifiedType(), 2683 Canon->containsUnexpandedParameterPack()), 2684 Replaced(Param) { } 2685 2686 friend class ASTContext; 2687 2688public: 2689 IdentifierInfo *getName() const { return Replaced->getName(); } 2690 2691 /// Gets the template parameter that was substituted for. 2692 const TemplateTypeParmType *getReplacedParameter() const { 2693 return Replaced; 2694 } 2695 2696 /// Gets the type that was substituted for the template 2697 /// parameter. 2698 QualType getReplacementType() const { 2699 return getCanonicalTypeInternal(); 2700 } 2701 2702 bool isSugared() const { return true; } 2703 QualType desugar() const { return getReplacementType(); } 2704 2705 void Profile(llvm::FoldingSetNodeID &ID) { 2706 Profile(ID, getReplacedParameter(), getReplacementType()); 2707 } 2708 static void Profile(llvm::FoldingSetNodeID &ID, 2709 const TemplateTypeParmType *Replaced, 2710 QualType Replacement) { 2711 ID.AddPointer(Replaced); 2712 ID.AddPointer(Replacement.getAsOpaquePtr()); 2713 } 2714 2715 static bool classof(const Type *T) { 2716 return T->getTypeClass() == SubstTemplateTypeParm; 2717 } 2718 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2719}; 2720 2721/// \brief Represents the type of a template specialization as written 2722/// in the source code. 2723/// 2724/// Template specialization types represent the syntactic form of a 2725/// template-id that refers to a type, e.g., @c vector<int>. Some 2726/// template specialization types are syntactic sugar, whose canonical 2727/// type will point to some other type node that represents the 2728/// instantiation or class template specialization. For example, a 2729/// class template specialization type of @c vector<int> will refer to 2730/// a tag type for the instantiation 2731/// @c std::vector<int, std::allocator<int>>. 2732/// 2733/// Other template specialization types, for which the template name 2734/// is dependent, may be canonical types. These types are always 2735/// dependent. 2736class TemplateSpecializationType 2737 : public Type, public llvm::FoldingSetNode { 2738 /// \brief The name of the template being specialized. 2739 TemplateName Template; 2740 2741 /// \brief - The number of template arguments named in this class 2742 /// template specialization. 2743 unsigned NumArgs; 2744 2745 TemplateSpecializationType(TemplateName T, 2746 const TemplateArgument *Args, 2747 unsigned NumArgs, QualType Canon); 2748 2749 friend class ASTContext; // ASTContext creates these 2750 2751public: 2752 /// \brief Determine whether any of the given template arguments are 2753 /// dependent. 2754 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2755 unsigned NumArgs); 2756 2757 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2758 unsigned NumArgs); 2759 2760 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2761 2762 /// \brief Print a template argument list, including the '<' and '>' 2763 /// enclosing the template arguments. 2764 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2765 unsigned NumArgs, 2766 const PrintingPolicy &Policy); 2767 2768 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2769 unsigned NumArgs, 2770 const PrintingPolicy &Policy); 2771 2772 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2773 const PrintingPolicy &Policy); 2774 2775 /// True if this template specialization type matches a current 2776 /// instantiation in the context in which it is found. 2777 bool isCurrentInstantiation() const { 2778 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2779 } 2780 2781 typedef const TemplateArgument * iterator; 2782 2783 iterator begin() const { return getArgs(); } 2784 iterator end() const; // defined inline in TemplateBase.h 2785 2786 /// \brief Retrieve the name of the template that we are specializing. 2787 TemplateName getTemplateName() const { return Template; } 2788 2789 /// \brief Retrieve the template arguments. 2790 const TemplateArgument *getArgs() const { 2791 return reinterpret_cast<const TemplateArgument *>(this + 1); 2792 } 2793 2794 /// \brief Retrieve the number of template arguments. 2795 unsigned getNumArgs() const { return NumArgs; } 2796 2797 /// \brief Retrieve a specific template argument as a type. 2798 /// \precondition @c isArgType(Arg) 2799 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2800 2801 bool isSugared() const { 2802 return !isDependentType() || isCurrentInstantiation(); 2803 } 2804 QualType desugar() const { return getCanonicalTypeInternal(); } 2805 2806 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2807 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2808 } 2809 2810 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2811 const TemplateArgument *Args, 2812 unsigned NumArgs, 2813 ASTContext &Context); 2814 2815 static bool classof(const Type *T) { 2816 return T->getTypeClass() == TemplateSpecialization; 2817 } 2818 static bool classof(const TemplateSpecializationType *T) { return true; } 2819}; 2820 2821/// \brief The injected class name of a C++ class template or class 2822/// template partial specialization. Used to record that a type was 2823/// spelled with a bare identifier rather than as a template-id; the 2824/// equivalent for non-templated classes is just RecordType. 2825/// 2826/// Injected class name types are always dependent. Template 2827/// instantiation turns these into RecordTypes. 2828/// 2829/// Injected class name types are always canonical. This works 2830/// because it is impossible to compare an injected class name type 2831/// with the corresponding non-injected template type, for the same 2832/// reason that it is impossible to directly compare template 2833/// parameters from different dependent contexts: injected class name 2834/// types can only occur within the scope of a particular templated 2835/// declaration, and within that scope every template specialization 2836/// will canonicalize to the injected class name (when appropriate 2837/// according to the rules of the language). 2838class InjectedClassNameType : public Type { 2839 CXXRecordDecl *Decl; 2840 2841 /// The template specialization which this type represents. 2842 /// For example, in 2843 /// template <class T> class A { ... }; 2844 /// this is A<T>, whereas in 2845 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2846 /// this is A<B<X,Y> >. 2847 /// 2848 /// It is always unqualified, always a template specialization type, 2849 /// and always dependent. 2850 QualType InjectedType; 2851 2852 friend class ASTContext; // ASTContext creates these. 2853 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2854 // currently suitable for AST reading, too much 2855 // interdependencies. 2856 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2857 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2858 /*VariablyModified=*/false, 2859 /*ContainsUnexpandedParameterPack=*/false), 2860 Decl(D), InjectedType(TST) { 2861 assert(isa<TemplateSpecializationType>(TST)); 2862 assert(!TST.hasQualifiers()); 2863 assert(TST->isDependentType()); 2864 } 2865 2866public: 2867 QualType getInjectedSpecializationType() const { return InjectedType; } 2868 const TemplateSpecializationType *getInjectedTST() const { 2869 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2870 } 2871 2872 CXXRecordDecl *getDecl() const; 2873 2874 bool isSugared() const { return false; } 2875 QualType desugar() const { return QualType(this, 0); } 2876 2877 static bool classof(const Type *T) { 2878 return T->getTypeClass() == InjectedClassName; 2879 } 2880 static bool classof(const InjectedClassNameType *T) { return true; } 2881}; 2882 2883/// \brief The kind of a tag type. 2884enum TagTypeKind { 2885 /// \brief The "struct" keyword. 2886 TTK_Struct, 2887 /// \brief The "union" keyword. 2888 TTK_Union, 2889 /// \brief The "class" keyword. 2890 TTK_Class, 2891 /// \brief The "enum" keyword. 2892 TTK_Enum 2893}; 2894 2895/// \brief The elaboration keyword that precedes a qualified type name or 2896/// introduces an elaborated-type-specifier. 2897enum ElaboratedTypeKeyword { 2898 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2899 ETK_Struct, 2900 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2901 ETK_Union, 2902 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2903 ETK_Class, 2904 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2905 ETK_Enum, 2906 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2907 /// \c typename T::type. 2908 ETK_Typename, 2909 /// \brief No keyword precedes the qualified type name. 2910 ETK_None 2911}; 2912 2913/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2914/// The keyword in stored in the free bits of the base class. 2915/// Also provides a few static helpers for converting and printing 2916/// elaborated type keyword and tag type kind enumerations. 2917class TypeWithKeyword : public Type { 2918protected: 2919 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2920 QualType Canonical, bool Dependent, bool VariablyModified, 2921 bool ContainsUnexpandedParameterPack) 2922 : Type(tc, Canonical, Dependent, VariablyModified, 2923 ContainsUnexpandedParameterPack) { 2924 TypeWithKeywordBits.Keyword = Keyword; 2925 } 2926 2927public: 2928 ElaboratedTypeKeyword getKeyword() const { 2929 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 2930 } 2931 2932 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2933 /// into an elaborated type keyword. 2934 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2935 2936 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2937 /// into a tag type kind. It is an error to provide a type specifier 2938 /// which *isn't* a tag kind here. 2939 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2940 2941 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2942 /// elaborated type keyword. 2943 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2944 2945 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2946 // a TagTypeKind. It is an error to provide an elaborated type keyword 2947 /// which *isn't* a tag kind here. 2948 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2949 2950 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2951 2952 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2953 2954 static const char *getTagTypeKindName(TagTypeKind Kind) { 2955 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2956 } 2957 2958 class CannotCastToThisType {}; 2959 static CannotCastToThisType classof(const Type *); 2960}; 2961 2962/// \brief Represents a type that was referred to using an elaborated type 2963/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2964/// or both. 2965/// 2966/// This type is used to keep track of a type name as written in the 2967/// source code, including tag keywords and any nested-name-specifiers. 2968/// The type itself is always "sugar", used to express what was written 2969/// in the source code but containing no additional semantic information. 2970class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2971 2972 /// \brief The nested name specifier containing the qualifier. 2973 NestedNameSpecifier *NNS; 2974 2975 /// \brief The type that this qualified name refers to. 2976 QualType NamedType; 2977 2978 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2979 QualType NamedType, QualType CanonType) 2980 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2981 NamedType->isDependentType(), 2982 NamedType->isVariablyModifiedType(), 2983 NamedType->containsUnexpandedParameterPack()), 2984 NNS(NNS), NamedType(NamedType) { 2985 assert(!(Keyword == ETK_None && NNS == 0) && 2986 "ElaboratedType cannot have elaborated type keyword " 2987 "and name qualifier both null."); 2988 } 2989 2990 friend class ASTContext; // ASTContext creates these 2991 2992public: 2993 ~ElaboratedType(); 2994 2995 /// \brief Retrieve the qualification on this type. 2996 NestedNameSpecifier *getQualifier() const { return NNS; } 2997 2998 /// \brief Retrieve the type named by the qualified-id. 2999 QualType getNamedType() const { return NamedType; } 3000 3001 /// \brief Remove a single level of sugar. 3002 QualType desugar() const { return getNamedType(); } 3003 3004 /// \brief Returns whether this type directly provides sugar. 3005 bool isSugared() const { return true; } 3006 3007 void Profile(llvm::FoldingSetNodeID &ID) { 3008 Profile(ID, getKeyword(), NNS, NamedType); 3009 } 3010 3011 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3012 NestedNameSpecifier *NNS, QualType NamedType) { 3013 ID.AddInteger(Keyword); 3014 ID.AddPointer(NNS); 3015 NamedType.Profile(ID); 3016 } 3017 3018 static bool classof(const Type *T) { 3019 return T->getTypeClass() == Elaborated; 3020 } 3021 static bool classof(const ElaboratedType *T) { return true; } 3022}; 3023 3024/// \brief Represents a qualified type name for which the type name is 3025/// dependent. 3026/// 3027/// DependentNameType represents a class of dependent types that involve a 3028/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3029/// name of a type. The DependentNameType may start with a "typename" (for a 3030/// typename-specifier), "class", "struct", "union", or "enum" (for a 3031/// dependent elaborated-type-specifier), or nothing (in contexts where we 3032/// know that we must be referring to a type, e.g., in a base class specifier). 3033class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3034 3035 /// \brief The nested name specifier containing the qualifier. 3036 NestedNameSpecifier *NNS; 3037 3038 /// \brief The type that this typename specifier refers to. 3039 const IdentifierInfo *Name; 3040 3041 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3042 const IdentifierInfo *Name, QualType CanonType) 3043 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3044 /*VariablyModified=*/false, 3045 NNS->containsUnexpandedParameterPack()), 3046 NNS(NNS), Name(Name) { 3047 assert(NNS->isDependent() && 3048 "DependentNameType requires a dependent nested-name-specifier"); 3049 } 3050 3051 friend class ASTContext; // ASTContext creates these 3052 3053public: 3054 /// \brief Retrieve the qualification on this type. 3055 NestedNameSpecifier *getQualifier() const { return NNS; } 3056 3057 /// \brief Retrieve the type named by the typename specifier as an 3058 /// identifier. 3059 /// 3060 /// This routine will return a non-NULL identifier pointer when the 3061 /// form of the original typename was terminated by an identifier, 3062 /// e.g., "typename T::type". 3063 const IdentifierInfo *getIdentifier() const { 3064 return Name; 3065 } 3066 3067 bool isSugared() const { return false; } 3068 QualType desugar() const { return QualType(this, 0); } 3069 3070 void Profile(llvm::FoldingSetNodeID &ID) { 3071 Profile(ID, getKeyword(), NNS, Name); 3072 } 3073 3074 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3075 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3076 ID.AddInteger(Keyword); 3077 ID.AddPointer(NNS); 3078 ID.AddPointer(Name); 3079 } 3080 3081 static bool classof(const Type *T) { 3082 return T->getTypeClass() == DependentName; 3083 } 3084 static bool classof(const DependentNameType *T) { return true; } 3085}; 3086 3087/// DependentTemplateSpecializationType - Represents a template 3088/// specialization type whose template cannot be resolved, e.g. 3089/// A<T>::template B<T> 3090class DependentTemplateSpecializationType : 3091 public TypeWithKeyword, public llvm::FoldingSetNode { 3092 3093 /// \brief The nested name specifier containing the qualifier. 3094 NestedNameSpecifier *NNS; 3095 3096 /// \brief The identifier of the template. 3097 const IdentifierInfo *Name; 3098 3099 /// \brief - The number of template arguments named in this class 3100 /// template specialization. 3101 unsigned NumArgs; 3102 3103 const TemplateArgument *getArgBuffer() const { 3104 return reinterpret_cast<const TemplateArgument*>(this+1); 3105 } 3106 TemplateArgument *getArgBuffer() { 3107 return reinterpret_cast<TemplateArgument*>(this+1); 3108 } 3109 3110 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3111 NestedNameSpecifier *NNS, 3112 const IdentifierInfo *Name, 3113 unsigned NumArgs, 3114 const TemplateArgument *Args, 3115 QualType Canon); 3116 3117 friend class ASTContext; // ASTContext creates these 3118 3119public: 3120 NestedNameSpecifier *getQualifier() const { return NNS; } 3121 const IdentifierInfo *getIdentifier() const { return Name; } 3122 3123 /// \brief Retrieve the template arguments. 3124 const TemplateArgument *getArgs() const { 3125 return getArgBuffer(); 3126 } 3127 3128 /// \brief Retrieve the number of template arguments. 3129 unsigned getNumArgs() const { return NumArgs; } 3130 3131 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3132 3133 typedef const TemplateArgument * iterator; 3134 iterator begin() const { return getArgs(); } 3135 iterator end() const; // inline in TemplateBase.h 3136 3137 bool isSugared() const { return false; } 3138 QualType desugar() const { return QualType(this, 0); } 3139 3140 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 3141 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3142 } 3143 3144 static void Profile(llvm::FoldingSetNodeID &ID, 3145 ASTContext &Context, 3146 ElaboratedTypeKeyword Keyword, 3147 NestedNameSpecifier *Qualifier, 3148 const IdentifierInfo *Name, 3149 unsigned NumArgs, 3150 const TemplateArgument *Args); 3151 3152 static bool classof(const Type *T) { 3153 return T->getTypeClass() == DependentTemplateSpecialization; 3154 } 3155 static bool classof(const DependentTemplateSpecializationType *T) { 3156 return true; 3157 } 3158}; 3159 3160/// ObjCObjectType - Represents a class type in Objective C. 3161/// Every Objective C type is a combination of a base type and a 3162/// list of protocols. 3163/// 3164/// Given the following declarations: 3165/// @class C; 3166/// @protocol P; 3167/// 3168/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3169/// with base C and no protocols. 3170/// 3171/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3172/// 3173/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3174/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3175/// and no protocols. 3176/// 3177/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3178/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3179/// this should get its own sugar class to better represent the source. 3180class ObjCObjectType : public Type { 3181 // ObjCObjectType.NumProtocols - the number of protocols stored 3182 // after the ObjCObjectPointerType node. 3183 // 3184 // These protocols are those written directly on the type. If 3185 // protocol qualifiers ever become additive, the iterators will need 3186 // to get kindof complicated. 3187 // 3188 // In the canonical object type, these are sorted alphabetically 3189 // and uniqued. 3190 3191 /// Either a BuiltinType or an InterfaceType or sugar for either. 3192 QualType BaseType; 3193 3194 ObjCProtocolDecl * const *getProtocolStorage() const { 3195 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3196 } 3197 3198 ObjCProtocolDecl **getProtocolStorage(); 3199 3200protected: 3201 ObjCObjectType(QualType Canonical, QualType Base, 3202 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3203 3204 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3205 ObjCObjectType(enum Nonce_ObjCInterface) 3206 : Type(ObjCInterface, QualType(), false, false, false), 3207 BaseType(QualType(this_(), 0)) { 3208 ObjCObjectTypeBits.NumProtocols = 0; 3209 } 3210 3211public: 3212 /// getBaseType - Gets the base type of this object type. This is 3213 /// always (possibly sugar for) one of: 3214 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3215 /// user, which is a typedef for an ObjCPointerType) 3216 /// - the 'Class' builtin type (same caveat) 3217 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3218 QualType getBaseType() const { return BaseType; } 3219 3220 bool isObjCId() const { 3221 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3222 } 3223 bool isObjCClass() const { 3224 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3225 } 3226 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3227 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3228 bool isObjCUnqualifiedIdOrClass() const { 3229 if (!qual_empty()) return false; 3230 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3231 return T->getKind() == BuiltinType::ObjCId || 3232 T->getKind() == BuiltinType::ObjCClass; 3233 return false; 3234 } 3235 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3236 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3237 3238 /// Gets the interface declaration for this object type, if the base type 3239 /// really is an interface. 3240 ObjCInterfaceDecl *getInterface() const; 3241 3242 typedef ObjCProtocolDecl * const *qual_iterator; 3243 3244 qual_iterator qual_begin() const { return getProtocolStorage(); } 3245 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3246 3247 bool qual_empty() const { return getNumProtocols() == 0; } 3248 3249 /// getNumProtocols - Return the number of qualifying protocols in this 3250 /// interface type, or 0 if there are none. 3251 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3252 3253 /// \brief Fetch a protocol by index. 3254 ObjCProtocolDecl *getProtocol(unsigned I) const { 3255 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3256 return qual_begin()[I]; 3257 } 3258 3259 bool isSugared() const { return false; } 3260 QualType desugar() const { return QualType(this, 0); } 3261 3262 static bool classof(const Type *T) { 3263 return T->getTypeClass() == ObjCObject || 3264 T->getTypeClass() == ObjCInterface; 3265 } 3266 static bool classof(const ObjCObjectType *) { return true; } 3267}; 3268 3269/// ObjCObjectTypeImpl - A class providing a concrete implementation 3270/// of ObjCObjectType, so as to not increase the footprint of 3271/// ObjCInterfaceType. Code outside of ASTContext and the core type 3272/// system should not reference this type. 3273class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3274 friend class ASTContext; 3275 3276 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3277 // will need to be modified. 3278 3279 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3280 ObjCProtocolDecl * const *Protocols, 3281 unsigned NumProtocols) 3282 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3283 3284public: 3285 void Profile(llvm::FoldingSetNodeID &ID); 3286 static void Profile(llvm::FoldingSetNodeID &ID, 3287 QualType Base, 3288 ObjCProtocolDecl *const *protocols, 3289 unsigned NumProtocols); 3290}; 3291 3292inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3293 return reinterpret_cast<ObjCProtocolDecl**>( 3294 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3295} 3296 3297/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3298/// object oriented design. They basically correspond to C++ classes. There 3299/// are two kinds of interface types, normal interfaces like "NSString" and 3300/// qualified interfaces, which are qualified with a protocol list like 3301/// "NSString<NSCopyable, NSAmazing>". 3302/// 3303/// ObjCInterfaceType guarantees the following properties when considered 3304/// as a subtype of its superclass, ObjCObjectType: 3305/// - There are no protocol qualifiers. To reinforce this, code which 3306/// tries to invoke the protocol methods via an ObjCInterfaceType will 3307/// fail to compile. 3308/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3309/// T->getBaseType() == QualType(T, 0). 3310class ObjCInterfaceType : public ObjCObjectType { 3311 ObjCInterfaceDecl *Decl; 3312 3313 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3314 : ObjCObjectType(Nonce_ObjCInterface), 3315 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3316 friend class ASTContext; // ASTContext creates these. 3317 3318public: 3319 /// getDecl - Get the declaration of this interface. 3320 ObjCInterfaceDecl *getDecl() const { return Decl; } 3321 3322 bool isSugared() const { return false; } 3323 QualType desugar() const { return QualType(this, 0); } 3324 3325 static bool classof(const Type *T) { 3326 return T->getTypeClass() == ObjCInterface; 3327 } 3328 static bool classof(const ObjCInterfaceType *) { return true; } 3329 3330 // Nonsense to "hide" certain members of ObjCObjectType within this 3331 // class. People asking for protocols on an ObjCInterfaceType are 3332 // not going to get what they want: ObjCInterfaceTypes are 3333 // guaranteed to have no protocols. 3334 enum { 3335 qual_iterator, 3336 qual_begin, 3337 qual_end, 3338 getNumProtocols, 3339 getProtocol 3340 }; 3341}; 3342 3343inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3344 if (const ObjCInterfaceType *T = 3345 getBaseType()->getAs<ObjCInterfaceType>()) 3346 return T->getDecl(); 3347 return 0; 3348} 3349 3350/// ObjCObjectPointerType - Used to represent a pointer to an 3351/// Objective C object. These are constructed from pointer 3352/// declarators when the pointee type is an ObjCObjectType (or sugar 3353/// for one). In addition, the 'id' and 'Class' types are typedefs 3354/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3355/// are translated into these. 3356/// 3357/// Pointers to pointers to Objective C objects are still PointerTypes; 3358/// only the first level of pointer gets it own type implementation. 3359class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3360 QualType PointeeType; 3361 3362 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3363 : Type(ObjCObjectPointer, Canonical, false, false, false), 3364 PointeeType(Pointee) {} 3365 friend class ASTContext; // ASTContext creates these. 3366 3367public: 3368 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3369 /// The result will always be an ObjCObjectType or sugar thereof. 3370 QualType getPointeeType() const { return PointeeType; } 3371 3372 /// getObjCObjectType - Gets the type pointed to by this ObjC 3373 /// pointer. This method always returns non-null. 3374 /// 3375 /// This method is equivalent to getPointeeType() except that 3376 /// it discards any typedefs (or other sugar) between this 3377 /// type and the "outermost" object type. So for: 3378 /// @class A; @protocol P; @protocol Q; 3379 /// typedef A<P> AP; 3380 /// typedef A A1; 3381 /// typedef A1<P> A1P; 3382 /// typedef A1P<Q> A1PQ; 3383 /// For 'A*', getObjectType() will return 'A'. 3384 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3385 /// For 'AP*', getObjectType() will return 'A<P>'. 3386 /// For 'A1*', getObjectType() will return 'A'. 3387 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3388 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3389 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3390 /// adding protocols to a protocol-qualified base discards the 3391 /// old qualifiers (for now). But if it didn't, getObjectType() 3392 /// would return 'A1P<Q>' (and we'd have to make iterating over 3393 /// qualifiers more complicated). 3394 const ObjCObjectType *getObjectType() const { 3395 return PointeeType->getAs<ObjCObjectType>(); 3396 } 3397 3398 /// getInterfaceType - If this pointer points to an Objective C 3399 /// @interface type, gets the type for that interface. Any protocol 3400 /// qualifiers on the interface are ignored. 3401 /// 3402 /// \return null if the base type for this pointer is 'id' or 'Class' 3403 const ObjCInterfaceType *getInterfaceType() const { 3404 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3405 } 3406 3407 /// getInterfaceDecl - If this pointer points to an Objective @interface 3408 /// type, gets the declaration for that interface. 3409 /// 3410 /// \return null if the base type for this pointer is 'id' or 'Class' 3411 ObjCInterfaceDecl *getInterfaceDecl() const { 3412 return getObjectType()->getInterface(); 3413 } 3414 3415 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3416 /// its object type is the primitive 'id' type with no protocols. 3417 bool isObjCIdType() const { 3418 return getObjectType()->isObjCUnqualifiedId(); 3419 } 3420 3421 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3422 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3423 bool isObjCClassType() const { 3424 return getObjectType()->isObjCUnqualifiedClass(); 3425 } 3426 3427 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3428 /// non-empty set of protocols. 3429 bool isObjCQualifiedIdType() const { 3430 return getObjectType()->isObjCQualifiedId(); 3431 } 3432 3433 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3434 /// some non-empty set of protocols. 3435 bool isObjCQualifiedClassType() const { 3436 return getObjectType()->isObjCQualifiedClass(); 3437 } 3438 3439 /// An iterator over the qualifiers on the object type. Provided 3440 /// for convenience. This will always iterate over the full set of 3441 /// protocols on a type, not just those provided directly. 3442 typedef ObjCObjectType::qual_iterator qual_iterator; 3443 3444 qual_iterator qual_begin() const { 3445 return getObjectType()->qual_begin(); 3446 } 3447 qual_iterator qual_end() const { 3448 return getObjectType()->qual_end(); 3449 } 3450 bool qual_empty() const { return getObjectType()->qual_empty(); } 3451 3452 /// getNumProtocols - Return the number of qualifying protocols on 3453 /// the object type. 3454 unsigned getNumProtocols() const { 3455 return getObjectType()->getNumProtocols(); 3456 } 3457 3458 /// \brief Retrieve a qualifying protocol by index on the object 3459 /// type. 3460 ObjCProtocolDecl *getProtocol(unsigned I) const { 3461 return getObjectType()->getProtocol(I); 3462 } 3463 3464 bool isSugared() const { return false; } 3465 QualType desugar() const { return QualType(this, 0); } 3466 3467 void Profile(llvm::FoldingSetNodeID &ID) { 3468 Profile(ID, getPointeeType()); 3469 } 3470 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3471 ID.AddPointer(T.getAsOpaquePtr()); 3472 } 3473 static bool classof(const Type *T) { 3474 return T->getTypeClass() == ObjCObjectPointer; 3475 } 3476 static bool classof(const ObjCObjectPointerType *) { return true; } 3477}; 3478 3479/// A qualifier set is used to build a set of qualifiers. 3480class QualifierCollector : public Qualifiers { 3481public: 3482 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3483 3484 /// Collect any qualifiers on the given type and return an 3485 /// unqualified type. 3486 const Type *strip(QualType QT) { 3487 addFastQualifiers(QT.getLocalFastQualifiers()); 3488 if (QT.hasLocalNonFastQualifiers()) { 3489 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3490 addQualifiers(EQ->getQualifiers()); 3491 return EQ->getBaseType(); 3492 } 3493 return QT.getTypePtrUnsafe(); 3494 } 3495 3496 /// Apply the collected qualifiers to the given type. 3497 QualType apply(ASTContext &Context, QualType QT) const; 3498 3499 /// Apply the collected qualifiers to the given type. 3500 QualType apply(ASTContext &Context, const Type* T) const; 3501}; 3502 3503 3504// Inline function definitions. 3505 3506inline bool QualType::isCanonical() const { 3507 const Type *T = getTypePtr(); 3508 if (hasLocalQualifiers()) 3509 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3510 return T->isCanonicalUnqualified(); 3511} 3512 3513inline bool QualType::isCanonicalAsParam() const { 3514 if (hasLocalQualifiers()) return false; 3515 3516 const Type *T = getTypePtr(); 3517 if ((*this)->isPointerType()) { 3518 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3519 if (isa<VariableArrayType>(BaseType)) { 3520 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3521 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3522 if (VAT->getSizeExpr()) 3523 T = BaseType.getTypePtr(); 3524 } 3525 } 3526 return T->isCanonicalUnqualified() && 3527 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3528} 3529 3530inline bool QualType::isConstQualified() const { 3531 return isLocalConstQualified() || 3532 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3533} 3534 3535inline bool QualType::isRestrictQualified() const { 3536 return isLocalRestrictQualified() || 3537 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3538} 3539 3540 3541inline bool QualType::isVolatileQualified() const { 3542 return isLocalVolatileQualified() || 3543 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3544} 3545 3546inline bool QualType::hasQualifiers() const { 3547 return hasLocalQualifiers() || 3548 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3549} 3550 3551inline Qualifiers QualType::getQualifiers() const { 3552 Qualifiers Quals = getLocalQualifiers(); 3553 Quals.addQualifiers( 3554 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3555 return Quals; 3556} 3557 3558inline unsigned QualType::getCVRQualifiers() const { 3559 return getLocalCVRQualifiers() | 3560 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3561} 3562 3563/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3564/// type, returns them. Otherwise, if this is an array type, recurses 3565/// on the element type until some qualifiers have been found or a non-array 3566/// type reached. 3567inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3568 if (unsigned Quals = getCVRQualifiers()) 3569 return Quals; 3570 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3571 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3572 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3573 return 0; 3574} 3575 3576inline void QualType::removeLocalConst() { 3577 removeLocalFastQualifiers(Qualifiers::Const); 3578} 3579 3580inline void QualType::removeLocalRestrict() { 3581 removeLocalFastQualifiers(Qualifiers::Restrict); 3582} 3583 3584inline void QualType::removeLocalVolatile() { 3585 removeLocalFastQualifiers(Qualifiers::Volatile); 3586} 3587 3588inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 3589 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3590 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 3591 3592 // Fast path: we don't need to touch the slow qualifiers. 3593 removeLocalFastQualifiers(Mask); 3594} 3595 3596/// getAddressSpace - Return the address space of this type. 3597inline unsigned QualType::getAddressSpace() const { 3598 if (hasLocalNonFastQualifiers()) { 3599 const ExtQuals *EQ = getExtQualsUnsafe(); 3600 if (EQ->hasAddressSpace()) 3601 return EQ->getAddressSpace(); 3602 } 3603 3604 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3605 if (CT.hasLocalNonFastQualifiers()) { 3606 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3607 if (EQ->hasAddressSpace()) 3608 return EQ->getAddressSpace(); 3609 } 3610 3611 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3612 return AT->getElementType().getAddressSpace(); 3613 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3614 return RT->getAddressSpace(); 3615 return 0; 3616} 3617 3618/// getObjCGCAttr - Return the gc attribute of this type. 3619inline Qualifiers::GC QualType::getObjCGCAttr() const { 3620 if (hasLocalNonFastQualifiers()) { 3621 const ExtQuals *EQ = getExtQualsUnsafe(); 3622 if (EQ->hasObjCGCAttr()) 3623 return EQ->getObjCGCAttr(); 3624 } 3625 3626 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3627 if (CT.hasLocalNonFastQualifiers()) { 3628 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3629 if (EQ->hasObjCGCAttr()) 3630 return EQ->getObjCGCAttr(); 3631 } 3632 3633 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3634 return AT->getElementType().getObjCGCAttr(); 3635 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3636 return PT->getPointeeType().getObjCGCAttr(); 3637 // We most look at all pointer types, not just pointer to interface types. 3638 if (const PointerType *PT = CT->getAs<PointerType>()) 3639 return PT->getPointeeType().getObjCGCAttr(); 3640 return Qualifiers::GCNone; 3641} 3642 3643inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3644 if (const PointerType *PT = t.getAs<PointerType>()) { 3645 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3646 return FT->getExtInfo(); 3647 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3648 return FT->getExtInfo(); 3649 3650 return FunctionType::ExtInfo(); 3651} 3652 3653inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3654 return getFunctionExtInfo(*t); 3655} 3656 3657/// \brief Determine whether this set of qualifiers is a superset of the given 3658/// set of qualifiers. 3659inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3660 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3661} 3662 3663/// isMoreQualifiedThan - Determine whether this type is more 3664/// qualified than the Other type. For example, "const volatile int" 3665/// is more qualified than "const int", "volatile int", and 3666/// "int". However, it is not more qualified than "const volatile 3667/// int". 3668inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3669 // FIXME: work on arbitrary qualifiers 3670 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3671 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3672 if (getAddressSpace() != Other.getAddressSpace()) 3673 return false; 3674 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3675} 3676 3677/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3678/// as qualified as the Other type. For example, "const volatile 3679/// int" is at least as qualified as "const int", "volatile int", 3680/// "int", and "const volatile int". 3681inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3682 // FIXME: work on arbitrary qualifiers 3683 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3684 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3685 if (getAddressSpace() != Other.getAddressSpace()) 3686 return false; 3687 return (MyQuals | OtherQuals) == MyQuals; 3688} 3689 3690/// getNonReferenceType - If Type is a reference type (e.g., const 3691/// int&), returns the type that the reference refers to ("const 3692/// int"). Otherwise, returns the type itself. This routine is used 3693/// throughout Sema to implement C++ 5p6: 3694/// 3695/// If an expression initially has the type "reference to T" (8.3.2, 3696/// 8.5.3), the type is adjusted to "T" prior to any further 3697/// analysis, the expression designates the object or function 3698/// denoted by the reference, and the expression is an lvalue. 3699inline QualType QualType::getNonReferenceType() const { 3700 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3701 return RefType->getPointeeType(); 3702 else 3703 return *this; 3704} 3705 3706inline bool Type::isFunctionType() const { 3707 return isa<FunctionType>(CanonicalType); 3708} 3709inline bool Type::isPointerType() const { 3710 return isa<PointerType>(CanonicalType); 3711} 3712inline bool Type::isAnyPointerType() const { 3713 return isPointerType() || isObjCObjectPointerType(); 3714} 3715inline bool Type::isBlockPointerType() const { 3716 return isa<BlockPointerType>(CanonicalType); 3717} 3718inline bool Type::isReferenceType() const { 3719 return isa<ReferenceType>(CanonicalType); 3720} 3721inline bool Type::isLValueReferenceType() const { 3722 return isa<LValueReferenceType>(CanonicalType); 3723} 3724inline bool Type::isRValueReferenceType() const { 3725 return isa<RValueReferenceType>(CanonicalType); 3726} 3727inline bool Type::isFunctionPointerType() const { 3728 if (const PointerType* T = getAs<PointerType>()) 3729 return T->getPointeeType()->isFunctionType(); 3730 else 3731 return false; 3732} 3733inline bool Type::isMemberPointerType() const { 3734 return isa<MemberPointerType>(CanonicalType); 3735} 3736inline bool Type::isMemberFunctionPointerType() const { 3737 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3738 return T->isMemberFunctionPointer(); 3739 else 3740 return false; 3741} 3742inline bool Type::isMemberDataPointerType() const { 3743 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3744 return T->isMemberDataPointer(); 3745 else 3746 return false; 3747} 3748inline bool Type::isArrayType() const { 3749 return isa<ArrayType>(CanonicalType); 3750} 3751inline bool Type::isConstantArrayType() const { 3752 return isa<ConstantArrayType>(CanonicalType); 3753} 3754inline bool Type::isIncompleteArrayType() const { 3755 return isa<IncompleteArrayType>(CanonicalType); 3756} 3757inline bool Type::isVariableArrayType() const { 3758 return isa<VariableArrayType>(CanonicalType); 3759} 3760inline bool Type::isDependentSizedArrayType() const { 3761 return isa<DependentSizedArrayType>(CanonicalType); 3762} 3763inline bool Type::isBuiltinType() const { 3764 return isa<BuiltinType>(CanonicalType); 3765} 3766inline bool Type::isRecordType() const { 3767 return isa<RecordType>(CanonicalType); 3768} 3769inline bool Type::isEnumeralType() const { 3770 return isa<EnumType>(CanonicalType); 3771} 3772inline bool Type::isAnyComplexType() const { 3773 return isa<ComplexType>(CanonicalType); 3774} 3775inline bool Type::isVectorType() const { 3776 return isa<VectorType>(CanonicalType); 3777} 3778inline bool Type::isExtVectorType() const { 3779 return isa<ExtVectorType>(CanonicalType); 3780} 3781inline bool Type::isObjCObjectPointerType() const { 3782 return isa<ObjCObjectPointerType>(CanonicalType); 3783} 3784inline bool Type::isObjCObjectType() const { 3785 return isa<ObjCObjectType>(CanonicalType); 3786} 3787inline bool Type::isObjCObjectOrInterfaceType() const { 3788 return isa<ObjCInterfaceType>(CanonicalType) || 3789 isa<ObjCObjectType>(CanonicalType); 3790} 3791 3792inline bool Type::isObjCQualifiedIdType() const { 3793 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3794 return OPT->isObjCQualifiedIdType(); 3795 return false; 3796} 3797inline bool Type::isObjCQualifiedClassType() const { 3798 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3799 return OPT->isObjCQualifiedClassType(); 3800 return false; 3801} 3802inline bool Type::isObjCIdType() const { 3803 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3804 return OPT->isObjCIdType(); 3805 return false; 3806} 3807inline bool Type::isObjCClassType() const { 3808 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3809 return OPT->isObjCClassType(); 3810 return false; 3811} 3812inline bool Type::isObjCSelType() const { 3813 if (const PointerType *OPT = getAs<PointerType>()) 3814 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3815 return false; 3816} 3817inline bool Type::isObjCBuiltinType() const { 3818 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3819} 3820inline bool Type::isTemplateTypeParmType() const { 3821 return isa<TemplateTypeParmType>(CanonicalType); 3822} 3823 3824inline bool Type::isSpecificBuiltinType(unsigned K) const { 3825 if (const BuiltinType *BT = getAs<BuiltinType>()) 3826 if (BT->getKind() == (BuiltinType::Kind) K) 3827 return true; 3828 return false; 3829} 3830 3831inline bool Type::isPlaceholderType() const { 3832 if (const BuiltinType *BT = getAs<BuiltinType>()) 3833 return BT->isPlaceholderType(); 3834 return false; 3835} 3836 3837/// \brief Determines whether this is a type for which one can define 3838/// an overloaded operator. 3839inline bool Type::isOverloadableType() const { 3840 return isDependentType() || isRecordType() || isEnumeralType(); 3841} 3842 3843inline bool Type::hasPointerRepresentation() const { 3844 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3845 isObjCObjectPointerType() || isNullPtrType()); 3846} 3847 3848inline bool Type::hasObjCPointerRepresentation() const { 3849 return isObjCObjectPointerType(); 3850} 3851 3852/// Insertion operator for diagnostics. This allows sending QualType's into a 3853/// diagnostic with <<. 3854inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3855 QualType T) { 3856 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3857 Diagnostic::ak_qualtype); 3858 return DB; 3859} 3860 3861/// Insertion operator for partial diagnostics. This allows sending QualType's 3862/// into a diagnostic with <<. 3863inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3864 QualType T) { 3865 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3866 Diagnostic::ak_qualtype); 3867 return PD; 3868} 3869 3870// Helper class template that is used by Type::getAs to ensure that one does 3871// not try to look through a qualified type to get to an array type. 3872template<typename T, 3873 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3874 llvm::is_base_of<ArrayType, T>::value)> 3875struct ArrayType_cannot_be_used_with_getAs { }; 3876 3877template<typename T> 3878struct ArrayType_cannot_be_used_with_getAs<T, true>; 3879 3880/// Member-template getAs<specific type>'. 3881template <typename T> const T *Type::getAs() const { 3882 ArrayType_cannot_be_used_with_getAs<T> at; 3883 (void)at; 3884 3885 // If this is directly a T type, return it. 3886 if (const T *Ty = dyn_cast<T>(this)) 3887 return Ty; 3888 3889 // If the canonical form of this type isn't the right kind, reject it. 3890 if (!isa<T>(CanonicalType)) 3891 return 0; 3892 3893 // If this is a typedef for the type, strip the typedef off without 3894 // losing all typedef information. 3895 return cast<T>(getUnqualifiedDesugaredType()); 3896} 3897 3898} // end namespace clang 3899 3900#endif 3901