Type.h revision 2fdc5e8199e1e239620f2faae88997153703e16f
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/Basic/Visibility.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/TemplateName.h" 24#include "llvm/Support/Casting.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/ADT/APSInt.h" 27#include "llvm/ADT/FoldingSet.h" 28#include "llvm/ADT/PointerIntPair.h" 29#include "llvm/ADT/PointerUnion.h" 30 31using llvm::isa; 32using llvm::cast; 33using llvm::cast_or_null; 34using llvm::dyn_cast; 35using llvm::dyn_cast_or_null; 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class ObjCInterfaceDecl; 85 class ObjCProtocolDecl; 86 class ObjCMethodDecl; 87 class UnresolvedUsingTypenameDecl; 88 class Expr; 89 class Stmt; 90 class SourceLocation; 91 class StmtIteratorBase; 92 class TemplateArgument; 93 class TemplateArgumentLoc; 94 class TemplateArgumentListInfo; 95 class ElaboratedType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 3, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool isSupersetOf(Qualifiers Other) const; 275 276 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 277 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 278 279 operator bool() const { return hasQualifiers(); } 280 281 Qualifiers &operator+=(Qualifiers R) { 282 addQualifiers(R); 283 return *this; 284 } 285 286 // Union two qualifier sets. If an enumerated qualifier appears 287 // in both sets, use the one from the right. 288 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 289 L += R; 290 return L; 291 } 292 293 Qualifiers &operator-=(Qualifiers R) { 294 Mask = Mask & ~(R.Mask); 295 return *this; 296 } 297 298 /// \brief Compute the difference between two qualifier sets. 299 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 300 L -= R; 301 return L; 302 } 303 304 std::string getAsString() const; 305 std::string getAsString(const PrintingPolicy &Policy) const { 306 std::string Buffer; 307 getAsStringInternal(Buffer, Policy); 308 return Buffer; 309 } 310 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 311 312 void Profile(llvm::FoldingSetNodeID &ID) const { 313 ID.AddInteger(Mask); 314 } 315 316private: 317 318 // bits: |0 1 2|3 .. 4|5 .. 31| 319 // |C R V|GCAttr|AddrSpace| 320 uint32_t Mask; 321 322 static const uint32_t GCAttrMask = 0x18; 323 static const uint32_t GCAttrShift = 3; 324 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 325 static const uint32_t AddressSpaceShift = 5; 326}; 327 328/// \brief Base class that is common to both the \c ExtQuals and \c Type 329/// classes, which allows \c QualType to access the common fields between the 330/// two. 331/// 332class ExtQualsTypeCommonBase { 333protected: 334 ExtQualsTypeCommonBase(const Type *BaseType) : BaseType(BaseType) { } 335 336 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 337 /// a self-referential pointer (for \c Type). 338 /// 339 /// This pointer allows an efficient mapping from a QualType to its 340 /// underlying type pointer. 341 const Type *BaseType; 342 343 friend class QualType; 344}; 345 346/// ExtQuals - We can encode up to four bits in the low bits of a 347/// type pointer, but there are many more type qualifiers that we want 348/// to be able to apply to an arbitrary type. Therefore we have this 349/// struct, intended to be heap-allocated and used by QualType to 350/// store qualifiers. 351/// 352/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 353/// in three low bits on the QualType pointer; a fourth bit records whether 354/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 355/// Objective-C GC attributes) are much more rare. 356class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 357 // NOTE: changing the fast qualifiers should be straightforward as 358 // long as you don't make 'const' non-fast. 359 // 1. Qualifiers: 360 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 361 // Fast qualifiers must occupy the low-order bits. 362 // b) Update Qualifiers::FastWidth and FastMask. 363 // 2. QualType: 364 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 365 // b) Update remove{Volatile,Restrict}, defined near the end of 366 // this header. 367 // 3. ASTContext: 368 // a) Update get{Volatile,Restrict}Type. 369 370 /// Quals - the immutable set of qualifiers applied by this 371 /// node; always contains extended qualifiers. 372 Qualifiers Quals; 373 374public: 375 ExtQuals(const Type *Base, Qualifiers Quals) 376 : ExtQualsTypeCommonBase(Base), Quals(Quals) 377 { 378 assert(Quals.hasNonFastQualifiers() 379 && "ExtQuals created with no fast qualifiers"); 380 assert(!Quals.hasFastQualifiers() 381 && "ExtQuals created with fast qualifiers"); 382 } 383 384 Qualifiers getQualifiers() const { return Quals; } 385 386 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 387 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 388 389 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 390 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 391 392 const Type *getBaseType() const { return BaseType; } 393 394public: 395 void Profile(llvm::FoldingSetNodeID &ID) const { 396 Profile(ID, getBaseType(), Quals); 397 } 398 static void Profile(llvm::FoldingSetNodeID &ID, 399 const Type *BaseType, 400 Qualifiers Quals) { 401 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 402 ID.AddPointer(BaseType); 403 Quals.Profile(ID); 404 } 405}; 406 407/// CallingConv - Specifies the calling convention that a function uses. 408enum CallingConv { 409 CC_Default, 410 CC_C, // __attribute__((cdecl)) 411 CC_X86StdCall, // __attribute__((stdcall)) 412 CC_X86FastCall, // __attribute__((fastcall)) 413 CC_X86ThisCall, // __attribute__((thiscall)) 414 CC_X86Pascal // __attribute__((pascal)) 415}; 416 417typedef std::pair<const Type*, Qualifiers> SplitQualType; 418 419/// QualType - For efficiency, we don't store CV-qualified types as nodes on 420/// their own: instead each reference to a type stores the qualifiers. This 421/// greatly reduces the number of nodes we need to allocate for types (for 422/// example we only need one for 'int', 'const int', 'volatile int', 423/// 'const volatile int', etc). 424/// 425/// As an added efficiency bonus, instead of making this a pair, we 426/// just store the two bits we care about in the low bits of the 427/// pointer. To handle the packing/unpacking, we make QualType be a 428/// simple wrapper class that acts like a smart pointer. A third bit 429/// indicates whether there are extended qualifiers present, in which 430/// case the pointer points to a special structure. 431class QualType { 432 // Thankfully, these are efficiently composable. 433 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 434 Qualifiers::FastWidth> Value; 435 436 const ExtQuals *getExtQualsUnsafe() const { 437 return Value.getPointer().get<const ExtQuals*>(); 438 } 439 440 const Type *getTypePtrUnsafe() const { 441 return Value.getPointer().get<const Type*>(); 442 } 443 444 QualType getUnqualifiedTypeSlow() const; 445 446 friend class QualifierCollector; 447public: 448 QualType() {} 449 450 QualType(const Type *Ptr, unsigned Quals) 451 : Value(Ptr, Quals) {} 452 QualType(const ExtQuals *Ptr, unsigned Quals) 453 : Value(Ptr, Quals) {} 454 455 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 456 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 457 458 /// Retrieves a pointer to the underlying (unqualified) type. 459 /// This should really return a const Type, but it's not worth 460 /// changing all the users right now. 461 /// 462 /// This function requires that the type not be NULL. If the type might be 463 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 464 Type *getTypePtr() const { 465 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 466 uintptr_t CommonPtrVal 467 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 468 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 469 ExtQualsTypeCommonBase *CommonPtr 470 = reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 471 return const_cast<Type *>(CommonPtr->BaseType); 472 } 473 474 Type *getTypePtrOrNull() const { 475 uintptr_t TypePtrPtrVal 476 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 477 TypePtrPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 478 Type **TypePtrPtr = reinterpret_cast<Type**>(TypePtrPtrVal); 479 return TypePtrPtr? *TypePtrPtr : 0; 480 } 481 482 /// Divides a QualType into its unqualified type and a set of local 483 /// qualifiers. 484 SplitQualType split() const { 485 if (!hasLocalNonFastQualifiers()) 486 return SplitQualType(getTypePtrUnsafe(), 487 Qualifiers::fromFastMask(getLocalFastQualifiers())); 488 489 const ExtQuals *eq = getExtQualsUnsafe(); 490 Qualifiers qs = eq->getQualifiers(); 491 qs.addFastQualifiers(getLocalFastQualifiers()); 492 return SplitQualType(eq->getBaseType(), qs); 493 } 494 495 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 496 static QualType getFromOpaquePtr(void *Ptr) { 497 QualType T; 498 T.Value.setFromOpaqueValue(Ptr); 499 return T; 500 } 501 502 Type &operator*() const { 503 return *getTypePtr(); 504 } 505 506 Type *operator->() const { 507 return getTypePtr(); 508 } 509 510 bool isCanonical() const; 511 bool isCanonicalAsParam() const; 512 513 /// isNull - Return true if this QualType doesn't point to a type yet. 514 bool isNull() const { 515 return Value.getPointer().isNull(); 516 } 517 518 /// \brief Determine whether this particular QualType instance has the 519 /// "const" qualifier set, without looking through typedefs that may have 520 /// added "const" at a different level. 521 bool isLocalConstQualified() const { 522 return (getLocalFastQualifiers() & Qualifiers::Const); 523 } 524 525 /// \brief Determine whether this type is const-qualified. 526 bool isConstQualified() const; 527 528 /// \brief Determine whether this particular QualType instance has the 529 /// "restrict" qualifier set, without looking through typedefs that may have 530 /// added "restrict" at a different level. 531 bool isLocalRestrictQualified() const { 532 return (getLocalFastQualifiers() & Qualifiers::Restrict); 533 } 534 535 /// \brief Determine whether this type is restrict-qualified. 536 bool isRestrictQualified() const; 537 538 /// \brief Determine whether this particular QualType instance has the 539 /// "volatile" qualifier set, without looking through typedefs that may have 540 /// added "volatile" at a different level. 541 bool isLocalVolatileQualified() const { 542 return (getLocalFastQualifiers() & Qualifiers::Volatile); 543 } 544 545 /// \brief Determine whether this type is volatile-qualified. 546 bool isVolatileQualified() const; 547 548 /// \brief Determine whether this particular QualType instance has any 549 /// qualifiers, without looking through any typedefs that might add 550 /// qualifiers at a different level. 551 bool hasLocalQualifiers() const { 552 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 553 } 554 555 /// \brief Determine whether this type has any qualifiers. 556 bool hasQualifiers() const; 557 558 /// \brief Determine whether this particular QualType instance has any 559 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 560 /// instance. 561 bool hasLocalNonFastQualifiers() const { 562 return Value.getPointer().is<const ExtQuals*>(); 563 } 564 565 /// \brief Retrieve the set of qualifiers local to this particular QualType 566 /// instance, not including any qualifiers acquired through typedefs or 567 /// other sugar. 568 Qualifiers getLocalQualifiers() const { 569 Qualifiers Quals; 570 if (hasLocalNonFastQualifiers()) 571 Quals = getExtQualsUnsafe()->getQualifiers(); 572 Quals.addFastQualifiers(getLocalFastQualifiers()); 573 return Quals; 574 } 575 576 /// \brief Retrieve the set of qualifiers applied to this type. 577 Qualifiers getQualifiers() const; 578 579 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 580 /// local to this particular QualType instance, not including any qualifiers 581 /// acquired through typedefs or other sugar. 582 unsigned getLocalCVRQualifiers() const { 583 return getLocalFastQualifiers(); 584 } 585 586 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 587 /// applied to this type. 588 unsigned getCVRQualifiers() const; 589 590 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 591 /// applied to this type, looking through any number of unqualified array 592 /// types to their element types' qualifiers. 593 unsigned getCVRQualifiersThroughArrayTypes() const; 594 595 bool isConstant(ASTContext& Ctx) const { 596 return QualType::isConstant(*this, Ctx); 597 } 598 599 // Don't promise in the API that anything besides 'const' can be 600 // easily added. 601 602 /// addConst - add the specified type qualifier to this QualType. 603 void addConst() { 604 addFastQualifiers(Qualifiers::Const); 605 } 606 QualType withConst() const { 607 return withFastQualifiers(Qualifiers::Const); 608 } 609 610 void addFastQualifiers(unsigned TQs) { 611 assert(!(TQs & ~Qualifiers::FastMask) 612 && "non-fast qualifier bits set in mask!"); 613 Value.setInt(Value.getInt() | TQs); 614 } 615 616 void removeLocalConst(); 617 void removeLocalVolatile(); 618 void removeLocalRestrict(); 619 void removeLocalCVRQualifiers(unsigned Mask); 620 621 void removeLocalFastQualifiers() { Value.setInt(0); } 622 void removeLocalFastQualifiers(unsigned Mask) { 623 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 624 Value.setInt(Value.getInt() & ~Mask); 625 } 626 627 // Creates a type with the given qualifiers in addition to any 628 // qualifiers already on this type. 629 QualType withFastQualifiers(unsigned TQs) const { 630 QualType T = *this; 631 T.addFastQualifiers(TQs); 632 return T; 633 } 634 635 // Creates a type with exactly the given fast qualifiers, removing 636 // any existing fast qualifiers. 637 QualType withExactLocalFastQualifiers(unsigned TQs) const { 638 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 639 } 640 641 // Removes fast qualifiers, but leaves any extended qualifiers in place. 642 QualType withoutLocalFastQualifiers() const { 643 QualType T = *this; 644 T.removeLocalFastQualifiers(); 645 return T; 646 } 647 648 /// \brief Return this type with all of the instance-specific qualifiers 649 /// removed, but without removing any qualifiers that may have been applied 650 /// through typedefs. 651 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 652 653 /// \brief Return the unqualified form of the given type, which might be 654 /// desugared to eliminate qualifiers introduced via typedefs. 655 QualType getUnqualifiedType() const { 656 QualType T = getLocalUnqualifiedType(); 657 if (!T.hasQualifiers()) 658 return T; 659 660 return getUnqualifiedTypeSlow(); 661 } 662 663 bool isMoreQualifiedThan(QualType Other) const; 664 bool isAtLeastAsQualifiedAs(QualType Other) const; 665 QualType getNonReferenceType() const; 666 667 /// \brief Determine the type of a (typically non-lvalue) expression with the 668 /// specified result type. 669 /// 670 /// This routine should be used for expressions for which the return type is 671 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 672 /// an lvalue. It removes a top-level reference (since there are no 673 /// expressions of reference type) and deletes top-level cvr-qualifiers 674 /// from non-class types (in C++) or all types (in C). 675 QualType getNonLValueExprType(ASTContext &Context) const; 676 677 /// getDesugaredType - Return the specified type with any "sugar" removed from 678 /// the type. This takes off typedefs, typeof's etc. If the outer level of 679 /// the type is already concrete, it returns it unmodified. This is similar 680 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 681 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 682 /// concrete. 683 /// 684 /// Qualifiers are left in place. 685 QualType getDesugaredType(ASTContext &Context) const { 686 return getDesugaredType(*this, Context); 687 } 688 689 SplitQualType getSplitDesugaredType() const { 690 return getSplitDesugaredType(*this); 691 } 692 693 /// IgnoreParens - Returns the specified type after dropping any 694 /// outer-level parentheses. 695 QualType IgnoreParens() const { 696 if (isa<ParenType>(*this)) 697 return QualType::IgnoreParens(*this); 698 return *this; 699 } 700 701 /// operator==/!= - Indicate whether the specified types and qualifiers are 702 /// identical. 703 friend bool operator==(const QualType &LHS, const QualType &RHS) { 704 return LHS.Value == RHS.Value; 705 } 706 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 707 return LHS.Value != RHS.Value; 708 } 709 std::string getAsString() const { 710 return getAsString(split()); 711 } 712 static std::string getAsString(SplitQualType split) { 713 return getAsString(split.first, split.second); 714 } 715 static std::string getAsString(const Type *ty, Qualifiers qs); 716 717 std::string getAsString(const PrintingPolicy &Policy) const { 718 std::string S; 719 getAsStringInternal(S, Policy); 720 return S; 721 } 722 void getAsStringInternal(std::string &Str, 723 const PrintingPolicy &Policy) const { 724 return getAsStringInternal(split(), Str, Policy); 725 } 726 static void getAsStringInternal(SplitQualType split, std::string &out, 727 const PrintingPolicy &policy) { 728 return getAsStringInternal(split.first, split.second, out, policy); 729 } 730 static void getAsStringInternal(const Type *ty, Qualifiers qs, 731 std::string &out, 732 const PrintingPolicy &policy); 733 734 void dump(const char *s) const; 735 void dump() const; 736 737 void Profile(llvm::FoldingSetNodeID &ID) const { 738 ID.AddPointer(getAsOpaquePtr()); 739 } 740 741 /// getAddressSpace - Return the address space of this type. 742 inline unsigned getAddressSpace() const; 743 744 /// GCAttrTypesAttr - Returns gc attribute of this type. 745 inline Qualifiers::GC getObjCGCAttr() const; 746 747 /// isObjCGCWeak true when Type is objc's weak. 748 bool isObjCGCWeak() const { 749 return getObjCGCAttr() == Qualifiers::Weak; 750 } 751 752 /// isObjCGCStrong true when Type is objc's strong. 753 bool isObjCGCStrong() const { 754 return getObjCGCAttr() == Qualifiers::Strong; 755 } 756 757private: 758 // These methods are implemented in a separate translation unit; 759 // "static"-ize them to avoid creating temporary QualTypes in the 760 // caller. 761 static bool isConstant(QualType T, ASTContext& Ctx); 762 static QualType getDesugaredType(QualType T, ASTContext &Context); 763 static SplitQualType getSplitDesugaredType(QualType T); 764 static QualType IgnoreParens(QualType T); 765}; 766 767} // end clang. 768 769namespace llvm { 770/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 771/// to a specific Type class. 772template<> struct simplify_type<const ::clang::QualType> { 773 typedef ::clang::Type* SimpleType; 774 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 775 return Val.getTypePtr(); 776 } 777}; 778template<> struct simplify_type< ::clang::QualType> 779 : public simplify_type<const ::clang::QualType> {}; 780 781// Teach SmallPtrSet that QualType is "basically a pointer". 782template<> 783class PointerLikeTypeTraits<clang::QualType> { 784public: 785 static inline void *getAsVoidPointer(clang::QualType P) { 786 return P.getAsOpaquePtr(); 787 } 788 static inline clang::QualType getFromVoidPointer(void *P) { 789 return clang::QualType::getFromOpaquePtr(P); 790 } 791 // Various qualifiers go in low bits. 792 enum { NumLowBitsAvailable = 0 }; 793}; 794 795} // end namespace llvm 796 797namespace clang { 798 799/// Type - This is the base class of the type hierarchy. A central concept 800/// with types is that each type always has a canonical type. A canonical type 801/// is the type with any typedef names stripped out of it or the types it 802/// references. For example, consider: 803/// 804/// typedef int foo; 805/// typedef foo* bar; 806/// 'int *' 'foo *' 'bar' 807/// 808/// There will be a Type object created for 'int'. Since int is canonical, its 809/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 810/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 811/// there is a PointerType that represents 'int*', which, like 'int', is 812/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 813/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 814/// is also 'int*'. 815/// 816/// Non-canonical types are useful for emitting diagnostics, without losing 817/// information about typedefs being used. Canonical types are useful for type 818/// comparisons (they allow by-pointer equality tests) and useful for reasoning 819/// about whether something has a particular form (e.g. is a function type), 820/// because they implicitly, recursively, strip all typedefs out of a type. 821/// 822/// Types, once created, are immutable. 823/// 824class Type : public ExtQualsTypeCommonBase { 825public: 826 enum TypeClass { 827#define TYPE(Class, Base) Class, 828#define LAST_TYPE(Class) TypeLast = Class, 829#define ABSTRACT_TYPE(Class, Base) 830#include "clang/AST/TypeNodes.def" 831 TagFirst = Record, TagLast = Enum 832 }; 833 834private: 835 Type(const Type&); // DO NOT IMPLEMENT. 836 void operator=(const Type&); // DO NOT IMPLEMENT. 837 838 QualType CanonicalType; 839 840 /// Bitfields required by the Type class. 841 class TypeBitfields { 842 friend class Type; 843 template <class T> friend class TypePropertyCache; 844 845 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 846 unsigned TC : 8; 847 848 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 849 /// Note that this should stay at the end of the ivars for Type so that 850 /// subclasses can pack their bitfields into the same word. 851 unsigned Dependent : 1; 852 853 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 854 unsigned VariablyModified : 1; 855 856 /// \brief Whether this type contains an unexpanded parameter pack 857 /// (for C++0x variadic templates). 858 unsigned ContainsUnexpandedParameterPack : 1; 859 860 /// \brief Nonzero if the cache (i.e. the bitfields here starting 861 /// with 'Cache') is valid. If so, then this is a 862 /// LangOptions::VisibilityMode+1. 863 mutable unsigned CacheValidAndVisibility : 2; 864 865 /// \brief Linkage of this type. 866 mutable unsigned CachedLinkage : 2; 867 868 /// \brief Whether this type involves and local or unnamed types. 869 mutable unsigned CachedLocalOrUnnamed : 1; 870 871 /// \brief FromAST - Whether this type comes from an AST file. 872 mutable unsigned FromAST : 1; 873 874 bool isCacheValid() const { 875 return (CacheValidAndVisibility != 0); 876 } 877 Visibility getVisibility() const { 878 assert(isCacheValid() && "getting linkage from invalid cache"); 879 return static_cast<Visibility>(CacheValidAndVisibility-1); 880 } 881 Linkage getLinkage() const { 882 assert(isCacheValid() && "getting linkage from invalid cache"); 883 return static_cast<Linkage>(CachedLinkage); 884 } 885 bool hasLocalOrUnnamedType() const { 886 assert(isCacheValid() && "getting linkage from invalid cache"); 887 return CachedLocalOrUnnamed; 888 } 889 }; 890 enum { NumTypeBits = 17 }; 891 892protected: 893 // These classes allow subclasses to somewhat cleanly pack bitfields 894 // into Type. 895 896 class ArrayTypeBitfields { 897 friend class ArrayType; 898 899 unsigned : NumTypeBits; 900 901 /// IndexTypeQuals - CVR qualifiers from declarations like 902 /// 'int X[static restrict 4]'. For function parameters only. 903 unsigned IndexTypeQuals : 3; 904 905 /// SizeModifier - storage class qualifiers from declarations like 906 /// 'int X[static restrict 4]'. For function parameters only. 907 /// Actually an ArrayType::ArraySizeModifier. 908 unsigned SizeModifier : 3; 909 }; 910 911 class BuiltinTypeBitfields { 912 friend class BuiltinType; 913 914 unsigned : NumTypeBits; 915 916 /// The kind (BuiltinType::Kind) of builtin type this is. 917 unsigned Kind : 8; 918 }; 919 920 class FunctionTypeBitfields { 921 friend class FunctionType; 922 923 unsigned : NumTypeBits; 924 925 /// Extra information which affects how the function is called, like 926 /// regparm and the calling convention. 927 unsigned ExtInfo : 8; 928 929 /// Whether the function is variadic. Only used by FunctionProtoType. 930 unsigned Variadic : 1; 931 932 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 933 /// other bitfields. 934 /// The qualifiers are part of FunctionProtoType because... 935 /// 936 /// C++ 8.3.5p4: The return type, the parameter type list and the 937 /// cv-qualifier-seq, [...], are part of the function type. 938 unsigned TypeQuals : 3; 939 }; 940 941 class ObjCObjectTypeBitfields { 942 friend class ObjCObjectType; 943 944 unsigned : NumTypeBits; 945 946 /// NumProtocols - The number of protocols stored directly on this 947 /// object type. 948 unsigned NumProtocols : 32 - NumTypeBits; 949 }; 950 951 class ReferenceTypeBitfields { 952 friend class ReferenceType; 953 954 unsigned : NumTypeBits; 955 956 /// True if the type was originally spelled with an lvalue sigil. 957 /// This is never true of rvalue references but can also be false 958 /// on lvalue references because of C++0x [dcl.typedef]p9, 959 /// as follows: 960 /// 961 /// typedef int &ref; // lvalue, spelled lvalue 962 /// typedef int &&rvref; // rvalue 963 /// ref &a; // lvalue, inner ref, spelled lvalue 964 /// ref &&a; // lvalue, inner ref 965 /// rvref &a; // lvalue, inner ref, spelled lvalue 966 /// rvref &&a; // rvalue, inner ref 967 unsigned SpelledAsLValue : 1; 968 969 /// True if the inner type is a reference type. This only happens 970 /// in non-canonical forms. 971 unsigned InnerRef : 1; 972 }; 973 974 class TypeWithKeywordBitfields { 975 friend class TypeWithKeyword; 976 977 unsigned : NumTypeBits; 978 979 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 980 unsigned Keyword : 8; 981 }; 982 983 class VectorTypeBitfields { 984 friend class VectorType; 985 986 unsigned : NumTypeBits; 987 988 /// VecKind - The kind of vector, either a generic vector type or some 989 /// target-specific vector type such as for AltiVec or Neon. 990 unsigned VecKind : 3; 991 992 /// NumElements - The number of elements in the vector. 993 unsigned NumElements : 29 - NumTypeBits; 994 }; 995 996 union { 997 TypeBitfields TypeBits; 998 ArrayTypeBitfields ArrayTypeBits; 999 BuiltinTypeBitfields BuiltinTypeBits; 1000 FunctionTypeBitfields FunctionTypeBits; 1001 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1002 ReferenceTypeBitfields ReferenceTypeBits; 1003 TypeWithKeywordBitfields TypeWithKeywordBits; 1004 VectorTypeBitfields VectorTypeBits; 1005 }; 1006 1007private: 1008 /// \brief Set whether this type comes from an AST file. 1009 void setFromAST(bool V = true) const { 1010 TypeBits.FromAST = V; 1011 } 1012 1013 template <class T> friend class TypePropertyCache; 1014 1015protected: 1016 // silence VC++ warning C4355: 'this' : used in base member initializer list 1017 Type *this_() { return this; } 1018 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified, 1019 bool ContainsUnexpandedParameterPack) 1020 : ExtQualsTypeCommonBase(this), 1021 CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical) { 1022 TypeBits.TC = tc; 1023 TypeBits.Dependent = Dependent; 1024 TypeBits.VariablyModified = VariablyModified; 1025 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1026 TypeBits.CacheValidAndVisibility = 0; 1027 TypeBits.CachedLocalOrUnnamed = false; 1028 TypeBits.CachedLinkage = NoLinkage; 1029 TypeBits.FromAST = false; 1030 } 1031 friend class ASTContext; 1032 1033 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1034 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1035 void setContainsUnexpandedParameterPack(bool PP = true) { 1036 TypeBits.ContainsUnexpandedParameterPack = PP; 1037 } 1038 1039public: 1040 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1041 1042 /// \brief Whether this type comes from an AST file. 1043 bool isFromAST() const { return TypeBits.FromAST; } 1044 1045 /// \brief Whether this type is or contains an unexpanded parameter 1046 /// pack, used to support C++0x variadic templates. 1047 /// 1048 /// A type that contains a parameter pack shall be expanded by the 1049 /// ellipsis operator at some point. For example, the typedef in the 1050 /// following example contains an unexpanded parameter pack 'T': 1051 /// 1052 /// \code 1053 /// template<typename ...T> 1054 /// struct X { 1055 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1056 /// }; 1057 /// \endcode 1058 /// 1059 /// Note that this routine does not specify which 1060 bool containsUnexpandedParameterPack() const { 1061 return TypeBits.ContainsUnexpandedParameterPack; 1062 } 1063 1064 bool isCanonicalUnqualified() const { 1065 return CanonicalType.getTypePtr() == this; 1066 } 1067 1068 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1069 /// object types, function types, and incomplete types. 1070 1071 /// isIncompleteType - Return true if this is an incomplete type. 1072 /// A type that can describe objects, but which lacks information needed to 1073 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1074 /// routine will need to determine if the size is actually required. 1075 bool isIncompleteType() const; 1076 1077 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1078 /// type, in other words, not a function type. 1079 bool isIncompleteOrObjectType() const { 1080 return !isFunctionType(); 1081 } 1082 1083 /// \brief Determine whether this type is an object type. 1084 bool isObjectType() const { 1085 // C++ [basic.types]p8: 1086 // An object type is a (possibly cv-qualified) type that is not a 1087 // function type, not a reference type, and not a void type. 1088 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1089 } 1090 1091 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1092 bool isPODType() const; 1093 1094 /// isLiteralType - Return true if this is a literal type 1095 /// (C++0x [basic.types]p10) 1096 bool isLiteralType() const; 1097 1098 /// Helper methods to distinguish type categories. All type predicates 1099 /// operate on the canonical type, ignoring typedefs and qualifiers. 1100 1101 /// isBuiltinType - returns true if the type is a builtin type. 1102 bool isBuiltinType() const; 1103 1104 /// isSpecificBuiltinType - Test for a particular builtin type. 1105 bool isSpecificBuiltinType(unsigned K) const; 1106 1107 /// isPlaceholderType - Test for a type which does not represent an 1108 /// actual type-system type but is instead used as a placeholder for 1109 /// various convenient purposes within Clang. All such types are 1110 /// BuiltinTypes. 1111 bool isPlaceholderType() const; 1112 1113 /// isIntegerType() does *not* include complex integers (a GCC extension). 1114 /// isComplexIntegerType() can be used to test for complex integers. 1115 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1116 bool isEnumeralType() const; 1117 bool isBooleanType() const; 1118 bool isCharType() const; 1119 bool isWideCharType() const; 1120 bool isAnyCharacterType() const; 1121 bool isIntegralType(ASTContext &Ctx) const; 1122 1123 /// \brief Determine whether this type is an integral or enumeration type. 1124 bool isIntegralOrEnumerationType() const; 1125 /// \brief Determine whether this type is an integral or unscoped enumeration 1126 /// type. 1127 bool isIntegralOrUnscopedEnumerationType() const; 1128 1129 /// Floating point categories. 1130 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1131 /// isComplexType() does *not* include complex integers (a GCC extension). 1132 /// isComplexIntegerType() can be used to test for complex integers. 1133 bool isComplexType() const; // C99 6.2.5p11 (complex) 1134 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1135 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1136 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1137 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1138 bool isVoidType() const; // C99 6.2.5p19 1139 bool isDerivedType() const; // C99 6.2.5p20 1140 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1141 bool isAggregateType() const; 1142 1143 // Type Predicates: Check to see if this type is structurally the specified 1144 // type, ignoring typedefs and qualifiers. 1145 bool isFunctionType() const; 1146 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1147 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1148 bool isPointerType() const; 1149 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1150 bool isBlockPointerType() const; 1151 bool isVoidPointerType() const; 1152 bool isReferenceType() const; 1153 bool isLValueReferenceType() const; 1154 bool isRValueReferenceType() const; 1155 bool isFunctionPointerType() const; 1156 bool isMemberPointerType() const; 1157 bool isMemberFunctionPointerType() const; 1158 bool isMemberDataPointerType() const; 1159 bool isArrayType() const; 1160 bool isConstantArrayType() const; 1161 bool isIncompleteArrayType() const; 1162 bool isVariableArrayType() const; 1163 bool isDependentSizedArrayType() const; 1164 bool isRecordType() const; 1165 bool isClassType() const; 1166 bool isStructureType() const; 1167 bool isStructureOrClassType() const; 1168 bool isUnionType() const; 1169 bool isComplexIntegerType() const; // GCC _Complex integer type. 1170 bool isVectorType() const; // GCC vector type. 1171 bool isExtVectorType() const; // Extended vector type. 1172 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1173 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1174 // for the common case. 1175 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1176 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1177 bool isObjCQualifiedIdType() const; // id<foo> 1178 bool isObjCQualifiedClassType() const; // Class<foo> 1179 bool isObjCObjectOrInterfaceType() const; 1180 bool isObjCIdType() const; // id 1181 bool isObjCClassType() const; // Class 1182 bool isObjCSelType() const; // Class 1183 bool isObjCBuiltinType() const; // 'id' or 'Class' 1184 bool isTemplateTypeParmType() const; // C++ template type parameter 1185 bool isNullPtrType() const; // C++0x nullptr_t 1186 1187 enum ScalarTypeKind { 1188 STK_Pointer, 1189 STK_MemberPointer, 1190 STK_Bool, 1191 STK_Integral, 1192 STK_Floating, 1193 STK_IntegralComplex, 1194 STK_FloatingComplex 1195 }; 1196 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1197 ScalarTypeKind getScalarTypeKind() const; 1198 1199 /// isDependentType - Whether this type is a dependent type, meaning 1200 /// that its definition somehow depends on a template parameter 1201 /// (C++ [temp.dep.type]). 1202 bool isDependentType() const { return TypeBits.Dependent; } 1203 1204 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1205 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1206 1207 /// \brief Whether this type is or contains a local or unnamed type. 1208 bool hasUnnamedOrLocalType() const; 1209 1210 bool isOverloadableType() const; 1211 1212 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1213 bool isElaboratedTypeSpecifier() const; 1214 1215 /// hasPointerRepresentation - Whether this type is represented 1216 /// natively as a pointer; this includes pointers, references, block 1217 /// pointers, and Objective-C interface, qualified id, and qualified 1218 /// interface types, as well as nullptr_t. 1219 bool hasPointerRepresentation() const; 1220 1221 /// hasObjCPointerRepresentation - Whether this type can represent 1222 /// an objective pointer type for the purpose of GC'ability 1223 bool hasObjCPointerRepresentation() const; 1224 1225 /// \brief Determine whether this type has an integer representation 1226 /// of some sort, e.g., it is an integer type or a vector. 1227 bool hasIntegerRepresentation() const; 1228 1229 /// \brief Determine whether this type has an signed integer representation 1230 /// of some sort, e.g., it is an signed integer type or a vector. 1231 bool hasSignedIntegerRepresentation() const; 1232 1233 /// \brief Determine whether this type has an unsigned integer representation 1234 /// of some sort, e.g., it is an unsigned integer type or a vector. 1235 bool hasUnsignedIntegerRepresentation() const; 1236 1237 /// \brief Determine whether this type has a floating-point representation 1238 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1239 bool hasFloatingRepresentation() const; 1240 1241 // Type Checking Functions: Check to see if this type is structurally the 1242 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1243 // the best type we can. 1244 const RecordType *getAsStructureType() const; 1245 /// NOTE: getAs*ArrayType are methods on ASTContext. 1246 const RecordType *getAsUnionType() const; 1247 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1248 // The following is a convenience method that returns an ObjCObjectPointerType 1249 // for object declared using an interface. 1250 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1251 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1252 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1253 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1254 1255 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1256 /// because the type is a RecordType or because it is the injected-class-name 1257 /// type of a class template or class template partial specialization. 1258 CXXRecordDecl *getAsCXXRecordDecl() const; 1259 1260 // Member-template getAs<specific type>'. Look through sugar for 1261 // an instance of <specific type>. This scheme will eventually 1262 // replace the specific getAsXXXX methods above. 1263 // 1264 // There are some specializations of this member template listed 1265 // immediately following this class. 1266 template <typename T> const T *getAs() const; 1267 1268 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1269 /// element type of the array, potentially with type qualifiers missing. 1270 /// This method should never be used when type qualifiers are meaningful. 1271 const Type *getArrayElementTypeNoTypeQual() const; 1272 1273 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1274 /// pointer, this returns the respective pointee. 1275 QualType getPointeeType() const; 1276 1277 /// getUnqualifiedDesugaredType() - Return the specified type with 1278 /// any "sugar" removed from the type, removing any typedefs, 1279 /// typeofs, etc., as well as any qualifiers. 1280 const Type *getUnqualifiedDesugaredType() const; 1281 1282 /// More type predicates useful for type checking/promotion 1283 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1284 1285 /// isSignedIntegerType - Return true if this is an integer type that is 1286 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1287 /// an enum decl which has a signed representation, or a vector of signed 1288 /// integer element type. 1289 bool isSignedIntegerType() const; 1290 1291 /// isUnsignedIntegerType - Return true if this is an integer type that is 1292 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1293 /// decl which has an unsigned representation, or a vector of unsigned integer 1294 /// element type. 1295 bool isUnsignedIntegerType() const; 1296 1297 /// isConstantSizeType - Return true if this is not a variable sized type, 1298 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1299 /// incomplete types. 1300 bool isConstantSizeType() const; 1301 1302 /// isSpecifierType - Returns true if this type can be represented by some 1303 /// set of type specifiers. 1304 bool isSpecifierType() const; 1305 1306 /// \brief Determine the linkage of this type. 1307 Linkage getLinkage() const; 1308 1309 /// \brief Determine the visibility of this type. 1310 Visibility getVisibility() const; 1311 1312 /// \brief Determine the linkage and visibility of this type. 1313 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1314 1315 /// \brief Note that the linkage is no longer known. 1316 void ClearLinkageCache(); 1317 1318 const char *getTypeClassName() const; 1319 1320 QualType getCanonicalTypeInternal() const { 1321 return CanonicalType; 1322 } 1323 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1324 void dump() const; 1325 static bool classof(const Type *) { return true; } 1326 1327 friend class ASTReader; 1328 friend class ASTWriter; 1329}; 1330 1331template <> inline const TypedefType *Type::getAs() const { 1332 return dyn_cast<TypedefType>(this); 1333} 1334 1335// We can do canonical leaf types faster, because we don't have to 1336// worry about preserving child type decoration. 1337#define TYPE(Class, Base) 1338#define LEAF_TYPE(Class) \ 1339template <> inline const Class##Type *Type::getAs() const { \ 1340 return dyn_cast<Class##Type>(CanonicalType); \ 1341} 1342#include "clang/AST/TypeNodes.def" 1343 1344 1345/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1346/// types are always canonical and have a literal name field. 1347class BuiltinType : public Type { 1348public: 1349 enum Kind { 1350 Void, 1351 1352 Bool, // This is bool and/or _Bool. 1353 Char_U, // This is 'char' for targets where char is unsigned. 1354 UChar, // This is explicitly qualified unsigned char. 1355 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1356 Char16, // This is 'char16_t' for C++. 1357 Char32, // This is 'char32_t' for C++. 1358 UShort, 1359 UInt, 1360 ULong, 1361 ULongLong, 1362 UInt128, // __uint128_t 1363 1364 Char_S, // This is 'char' for targets where char is signed. 1365 SChar, // This is explicitly qualified signed char. 1366 WChar_S, // This is 'wchar_t' for C++, when signed. 1367 Short, 1368 Int, 1369 Long, 1370 LongLong, 1371 Int128, // __int128_t 1372 1373 Float, Double, LongDouble, 1374 1375 NullPtr, // This is the type of C++0x 'nullptr'. 1376 1377 /// This represents the type of an expression whose type is 1378 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1379 /// appear in situations where the structure of the type is 1380 /// theoretically deducible. 1381 Dependent, 1382 1383 Overload, // This represents the type of an overloaded function declaration. 1384 1385 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1386 // that has not been deduced yet. 1387 1388 /// The primitive Objective C 'id' type. The type pointed to by the 1389 /// user-visible 'id' type. Only ever shows up in an AST as the base 1390 /// type of an ObjCObjectType. 1391 ObjCId, 1392 1393 /// The primitive Objective C 'Class' type. The type pointed to by the 1394 /// user-visible 'Class' type. Only ever shows up in an AST as the 1395 /// base type of an ObjCObjectType. 1396 ObjCClass, 1397 1398 ObjCSel // This represents the ObjC 'SEL' type. 1399 }; 1400 1401public: 1402 BuiltinType(Kind K) 1403 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1404 /*VariablyModified=*/false, 1405 /*Unexpanded paramter pack=*/false) { 1406 BuiltinTypeBits.Kind = K; 1407 } 1408 1409 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1410 const char *getName(const LangOptions &LO) const; 1411 1412 bool isSugared() const { return false; } 1413 QualType desugar() const { return QualType(this, 0); } 1414 1415 bool isInteger() const { 1416 return getKind() >= Bool && getKind() <= Int128; 1417 } 1418 1419 bool isSignedInteger() const { 1420 return getKind() >= Char_S && getKind() <= Int128; 1421 } 1422 1423 bool isUnsignedInteger() const { 1424 return getKind() >= Bool && getKind() <= UInt128; 1425 } 1426 1427 bool isFloatingPoint() const { 1428 return getKind() >= Float && getKind() <= LongDouble; 1429 } 1430 1431 /// Determines whether this type is a "forbidden" placeholder type, 1432 /// i.e. a type which cannot appear in arbitrary positions in a 1433 /// fully-formed expression. 1434 bool isPlaceholderType() const { 1435 return getKind() == Overload || 1436 getKind() == UndeducedAuto; 1437 } 1438 1439 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1440 static bool classof(const BuiltinType *) { return true; } 1441}; 1442 1443/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1444/// types (_Complex float etc) as well as the GCC integer complex extensions. 1445/// 1446class ComplexType : public Type, public llvm::FoldingSetNode { 1447 QualType ElementType; 1448 ComplexType(QualType Element, QualType CanonicalPtr) : 1449 Type(Complex, CanonicalPtr, Element->isDependentType(), 1450 Element->isVariablyModifiedType(), 1451 Element->containsUnexpandedParameterPack()), 1452 ElementType(Element) { 1453 } 1454 friend class ASTContext; // ASTContext creates these. 1455 1456public: 1457 QualType getElementType() const { return ElementType; } 1458 1459 bool isSugared() const { return false; } 1460 QualType desugar() const { return QualType(this, 0); } 1461 1462 void Profile(llvm::FoldingSetNodeID &ID) { 1463 Profile(ID, getElementType()); 1464 } 1465 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1466 ID.AddPointer(Element.getAsOpaquePtr()); 1467 } 1468 1469 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1470 static bool classof(const ComplexType *) { return true; } 1471}; 1472 1473/// ParenType - Sugar for parentheses used when specifying types. 1474/// 1475class ParenType : public Type, public llvm::FoldingSetNode { 1476 QualType Inner; 1477 1478 ParenType(QualType InnerType, QualType CanonType) : 1479 Type(Paren, CanonType, InnerType->isDependentType(), 1480 InnerType->isVariablyModifiedType(), 1481 InnerType->containsUnexpandedParameterPack()), 1482 Inner(InnerType) { 1483 } 1484 friend class ASTContext; // ASTContext creates these. 1485 1486public: 1487 1488 QualType getInnerType() const { return Inner; } 1489 1490 bool isSugared() const { return true; } 1491 QualType desugar() const { return getInnerType(); } 1492 1493 void Profile(llvm::FoldingSetNodeID &ID) { 1494 Profile(ID, getInnerType()); 1495 } 1496 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1497 Inner.Profile(ID); 1498 } 1499 1500 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1501 static bool classof(const ParenType *) { return true; } 1502}; 1503 1504/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1505/// 1506class PointerType : public Type, public llvm::FoldingSetNode { 1507 QualType PointeeType; 1508 1509 PointerType(QualType Pointee, QualType CanonicalPtr) : 1510 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1511 Pointee->isVariablyModifiedType(), 1512 Pointee->containsUnexpandedParameterPack()), 1513 PointeeType(Pointee) { 1514 } 1515 friend class ASTContext; // ASTContext creates these. 1516 1517public: 1518 1519 QualType getPointeeType() const { return PointeeType; } 1520 1521 bool isSugared() const { return false; } 1522 QualType desugar() const { return QualType(this, 0); } 1523 1524 void Profile(llvm::FoldingSetNodeID &ID) { 1525 Profile(ID, getPointeeType()); 1526 } 1527 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1528 ID.AddPointer(Pointee.getAsOpaquePtr()); 1529 } 1530 1531 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1532 static bool classof(const PointerType *) { return true; } 1533}; 1534 1535/// BlockPointerType - pointer to a block type. 1536/// This type is to represent types syntactically represented as 1537/// "void (^)(int)", etc. Pointee is required to always be a function type. 1538/// 1539class BlockPointerType : public Type, public llvm::FoldingSetNode { 1540 QualType PointeeType; // Block is some kind of pointer type 1541 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1542 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1543 Pointee->isVariablyModifiedType(), 1544 Pointee->containsUnexpandedParameterPack()), 1545 PointeeType(Pointee) { 1546 } 1547 friend class ASTContext; // ASTContext creates these. 1548 1549public: 1550 1551 // Get the pointee type. Pointee is required to always be a function type. 1552 QualType getPointeeType() const { return PointeeType; } 1553 1554 bool isSugared() const { return false; } 1555 QualType desugar() const { return QualType(this, 0); } 1556 1557 void Profile(llvm::FoldingSetNodeID &ID) { 1558 Profile(ID, getPointeeType()); 1559 } 1560 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1561 ID.AddPointer(Pointee.getAsOpaquePtr()); 1562 } 1563 1564 static bool classof(const Type *T) { 1565 return T->getTypeClass() == BlockPointer; 1566 } 1567 static bool classof(const BlockPointerType *) { return true; } 1568}; 1569 1570/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1571/// 1572class ReferenceType : public Type, public llvm::FoldingSetNode { 1573 QualType PointeeType; 1574 1575protected: 1576 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1577 bool SpelledAsLValue) : 1578 Type(tc, CanonicalRef, Referencee->isDependentType(), 1579 Referencee->isVariablyModifiedType(), 1580 Referencee->containsUnexpandedParameterPack()), 1581 PointeeType(Referencee) 1582 { 1583 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1584 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1585 } 1586 1587public: 1588 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1589 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1590 1591 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1592 QualType getPointeeType() const { 1593 // FIXME: this might strip inner qualifiers; okay? 1594 const ReferenceType *T = this; 1595 while (T->isInnerRef()) 1596 T = T->PointeeType->getAs<ReferenceType>(); 1597 return T->PointeeType; 1598 } 1599 1600 void Profile(llvm::FoldingSetNodeID &ID) { 1601 Profile(ID, PointeeType, isSpelledAsLValue()); 1602 } 1603 static void Profile(llvm::FoldingSetNodeID &ID, 1604 QualType Referencee, 1605 bool SpelledAsLValue) { 1606 ID.AddPointer(Referencee.getAsOpaquePtr()); 1607 ID.AddBoolean(SpelledAsLValue); 1608 } 1609 1610 static bool classof(const Type *T) { 1611 return T->getTypeClass() == LValueReference || 1612 T->getTypeClass() == RValueReference; 1613 } 1614 static bool classof(const ReferenceType *) { return true; } 1615}; 1616 1617/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1618/// 1619class LValueReferenceType : public ReferenceType { 1620 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1621 bool SpelledAsLValue) : 1622 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1623 {} 1624 friend class ASTContext; // ASTContext creates these 1625public: 1626 bool isSugared() const { return false; } 1627 QualType desugar() const { return QualType(this, 0); } 1628 1629 static bool classof(const Type *T) { 1630 return T->getTypeClass() == LValueReference; 1631 } 1632 static bool classof(const LValueReferenceType *) { return true; } 1633}; 1634 1635/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1636/// 1637class RValueReferenceType : public ReferenceType { 1638 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1639 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1640 } 1641 friend class ASTContext; // ASTContext creates these 1642public: 1643 bool isSugared() const { return false; } 1644 QualType desugar() const { return QualType(this, 0); } 1645 1646 static bool classof(const Type *T) { 1647 return T->getTypeClass() == RValueReference; 1648 } 1649 static bool classof(const RValueReferenceType *) { return true; } 1650}; 1651 1652/// MemberPointerType - C++ 8.3.3 - Pointers to members 1653/// 1654class MemberPointerType : public Type, public llvm::FoldingSetNode { 1655 QualType PointeeType; 1656 /// The class of which the pointee is a member. Must ultimately be a 1657 /// RecordType, but could be a typedef or a template parameter too. 1658 const Type *Class; 1659 1660 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1661 Type(MemberPointer, CanonicalPtr, 1662 Cls->isDependentType() || Pointee->isDependentType(), 1663 Pointee->isVariablyModifiedType(), 1664 (Cls->containsUnexpandedParameterPack() || 1665 Pointee->containsUnexpandedParameterPack())), 1666 PointeeType(Pointee), Class(Cls) { 1667 } 1668 friend class ASTContext; // ASTContext creates these. 1669 1670public: 1671 QualType getPointeeType() const { return PointeeType; } 1672 1673 /// Returns true if the member type (i.e. the pointee type) is a 1674 /// function type rather than a data-member type. 1675 bool isMemberFunctionPointer() const { 1676 return PointeeType->isFunctionProtoType(); 1677 } 1678 1679 /// Returns true if the member type (i.e. the pointee type) is a 1680 /// data type rather than a function type. 1681 bool isMemberDataPointer() const { 1682 return !PointeeType->isFunctionProtoType(); 1683 } 1684 1685 const Type *getClass() const { return Class; } 1686 1687 bool isSugared() const { return false; } 1688 QualType desugar() const { return QualType(this, 0); } 1689 1690 void Profile(llvm::FoldingSetNodeID &ID) { 1691 Profile(ID, getPointeeType(), getClass()); 1692 } 1693 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1694 const Type *Class) { 1695 ID.AddPointer(Pointee.getAsOpaquePtr()); 1696 ID.AddPointer(Class); 1697 } 1698 1699 static bool classof(const Type *T) { 1700 return T->getTypeClass() == MemberPointer; 1701 } 1702 static bool classof(const MemberPointerType *) { return true; } 1703}; 1704 1705/// ArrayType - C99 6.7.5.2 - Array Declarators. 1706/// 1707class ArrayType : public Type, public llvm::FoldingSetNode { 1708public: 1709 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1710 /// an array with a static size (e.g. int X[static 4]), or an array 1711 /// with a star size (e.g. int X[*]). 1712 /// 'static' is only allowed on function parameters. 1713 enum ArraySizeModifier { 1714 Normal, Static, Star 1715 }; 1716private: 1717 /// ElementType - The element type of the array. 1718 QualType ElementType; 1719 1720protected: 1721 // C++ [temp.dep.type]p1: 1722 // A type is dependent if it is... 1723 // - an array type constructed from any dependent type or whose 1724 // size is specified by a constant expression that is 1725 // value-dependent, 1726 ArrayType(TypeClass tc, QualType et, QualType can, 1727 ArraySizeModifier sm, unsigned tq, 1728 bool ContainsUnexpandedParameterPack) 1729 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1730 (tc == VariableArray || et->isVariablyModifiedType()), 1731 ContainsUnexpandedParameterPack), 1732 ElementType(et) { 1733 ArrayTypeBits.IndexTypeQuals = tq; 1734 ArrayTypeBits.SizeModifier = sm; 1735 } 1736 1737 friend class ASTContext; // ASTContext creates these. 1738 1739public: 1740 QualType getElementType() const { return ElementType; } 1741 ArraySizeModifier getSizeModifier() const { 1742 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1743 } 1744 Qualifiers getIndexTypeQualifiers() const { 1745 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1746 } 1747 unsigned getIndexTypeCVRQualifiers() const { 1748 return ArrayTypeBits.IndexTypeQuals; 1749 } 1750 1751 static bool classof(const Type *T) { 1752 return T->getTypeClass() == ConstantArray || 1753 T->getTypeClass() == VariableArray || 1754 T->getTypeClass() == IncompleteArray || 1755 T->getTypeClass() == DependentSizedArray; 1756 } 1757 static bool classof(const ArrayType *) { return true; } 1758}; 1759 1760/// ConstantArrayType - This class represents the canonical version of 1761/// C arrays with a specified constant size. For example, the canonical 1762/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1763/// type is 'int' and the size is 404. 1764class ConstantArrayType : public ArrayType { 1765 llvm::APInt Size; // Allows us to unique the type. 1766 1767 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1768 ArraySizeModifier sm, unsigned tq) 1769 : ArrayType(ConstantArray, et, can, sm, tq, 1770 et->containsUnexpandedParameterPack()), 1771 Size(size) {} 1772protected: 1773 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1774 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1775 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1776 Size(size) {} 1777 friend class ASTContext; // ASTContext creates these. 1778public: 1779 const llvm::APInt &getSize() const { return Size; } 1780 bool isSugared() const { return false; } 1781 QualType desugar() const { return QualType(this, 0); } 1782 1783 1784 /// \brief Determine the number of bits required to address a member of 1785 // an array with the given element type and number of elements. 1786 static unsigned getNumAddressingBits(ASTContext &Context, 1787 QualType ElementType, 1788 const llvm::APInt &NumElements); 1789 1790 /// \brief Determine the maximum number of active bits that an array's size 1791 /// can require, which limits the maximum size of the array. 1792 static unsigned getMaxSizeBits(ASTContext &Context); 1793 1794 void Profile(llvm::FoldingSetNodeID &ID) { 1795 Profile(ID, getElementType(), getSize(), 1796 getSizeModifier(), getIndexTypeCVRQualifiers()); 1797 } 1798 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1799 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1800 unsigned TypeQuals) { 1801 ID.AddPointer(ET.getAsOpaquePtr()); 1802 ID.AddInteger(ArraySize.getZExtValue()); 1803 ID.AddInteger(SizeMod); 1804 ID.AddInteger(TypeQuals); 1805 } 1806 static bool classof(const Type *T) { 1807 return T->getTypeClass() == ConstantArray; 1808 } 1809 static bool classof(const ConstantArrayType *) { return true; } 1810}; 1811 1812/// IncompleteArrayType - This class represents C arrays with an unspecified 1813/// size. For example 'int A[]' has an IncompleteArrayType where the element 1814/// type is 'int' and the size is unspecified. 1815class IncompleteArrayType : public ArrayType { 1816 1817 IncompleteArrayType(QualType et, QualType can, 1818 ArraySizeModifier sm, unsigned tq) 1819 : ArrayType(IncompleteArray, et, can, sm, tq, 1820 et->containsUnexpandedParameterPack()) {} 1821 friend class ASTContext; // ASTContext creates these. 1822public: 1823 bool isSugared() const { return false; } 1824 QualType desugar() const { return QualType(this, 0); } 1825 1826 static bool classof(const Type *T) { 1827 return T->getTypeClass() == IncompleteArray; 1828 } 1829 static bool classof(const IncompleteArrayType *) { return true; } 1830 1831 friend class StmtIteratorBase; 1832 1833 void Profile(llvm::FoldingSetNodeID &ID) { 1834 Profile(ID, getElementType(), getSizeModifier(), 1835 getIndexTypeCVRQualifiers()); 1836 } 1837 1838 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1839 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1840 ID.AddPointer(ET.getAsOpaquePtr()); 1841 ID.AddInteger(SizeMod); 1842 ID.AddInteger(TypeQuals); 1843 } 1844}; 1845 1846/// VariableArrayType - This class represents C arrays with a specified size 1847/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1848/// Since the size expression is an arbitrary expression, we store it as such. 1849/// 1850/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1851/// should not be: two lexically equivalent variable array types could mean 1852/// different things, for example, these variables do not have the same type 1853/// dynamically: 1854/// 1855/// void foo(int x) { 1856/// int Y[x]; 1857/// ++x; 1858/// int Z[x]; 1859/// } 1860/// 1861class VariableArrayType : public ArrayType { 1862 /// SizeExpr - An assignment expression. VLA's are only permitted within 1863 /// a function block. 1864 Stmt *SizeExpr; 1865 /// Brackets - The left and right array brackets. 1866 SourceRange Brackets; 1867 1868 VariableArrayType(QualType et, QualType can, Expr *e, 1869 ArraySizeModifier sm, unsigned tq, 1870 SourceRange brackets) 1871 : ArrayType(VariableArray, et, can, sm, tq, 1872 et->containsUnexpandedParameterPack()), 1873 SizeExpr((Stmt*) e), Brackets(brackets) {} 1874 friend class ASTContext; // ASTContext creates these. 1875 1876public: 1877 Expr *getSizeExpr() const { 1878 // We use C-style casts instead of cast<> here because we do not wish 1879 // to have a dependency of Type.h on Stmt.h/Expr.h. 1880 return (Expr*) SizeExpr; 1881 } 1882 SourceRange getBracketsRange() const { return Brackets; } 1883 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1884 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1885 1886 bool isSugared() const { return false; } 1887 QualType desugar() const { return QualType(this, 0); } 1888 1889 static bool classof(const Type *T) { 1890 return T->getTypeClass() == VariableArray; 1891 } 1892 static bool classof(const VariableArrayType *) { return true; } 1893 1894 friend class StmtIteratorBase; 1895 1896 void Profile(llvm::FoldingSetNodeID &ID) { 1897 assert(0 && "Cannnot unique VariableArrayTypes."); 1898 } 1899}; 1900 1901/// DependentSizedArrayType - This type represents an array type in 1902/// C++ whose size is a value-dependent expression. For example: 1903/// 1904/// \code 1905/// template<typename T, int Size> 1906/// class array { 1907/// T data[Size]; 1908/// }; 1909/// \endcode 1910/// 1911/// For these types, we won't actually know what the array bound is 1912/// until template instantiation occurs, at which point this will 1913/// become either a ConstantArrayType or a VariableArrayType. 1914class DependentSizedArrayType : public ArrayType { 1915 ASTContext &Context; 1916 1917 /// \brief An assignment expression that will instantiate to the 1918 /// size of the array. 1919 /// 1920 /// The expression itself might be NULL, in which case the array 1921 /// type will have its size deduced from an initializer. 1922 Stmt *SizeExpr; 1923 1924 /// Brackets - The left and right array brackets. 1925 SourceRange Brackets; 1926 1927 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1928 Expr *e, ArraySizeModifier sm, unsigned tq, 1929 SourceRange brackets); 1930 1931 friend class ASTContext; // ASTContext creates these. 1932 1933public: 1934 Expr *getSizeExpr() const { 1935 // We use C-style casts instead of cast<> here because we do not wish 1936 // to have a dependency of Type.h on Stmt.h/Expr.h. 1937 return (Expr*) SizeExpr; 1938 } 1939 SourceRange getBracketsRange() const { return Brackets; } 1940 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1941 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1942 1943 bool isSugared() const { return false; } 1944 QualType desugar() const { return QualType(this, 0); } 1945 1946 static bool classof(const Type *T) { 1947 return T->getTypeClass() == DependentSizedArray; 1948 } 1949 static bool classof(const DependentSizedArrayType *) { return true; } 1950 1951 friend class StmtIteratorBase; 1952 1953 1954 void Profile(llvm::FoldingSetNodeID &ID) { 1955 Profile(ID, Context, getElementType(), 1956 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1957 } 1958 1959 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1960 QualType ET, ArraySizeModifier SizeMod, 1961 unsigned TypeQuals, Expr *E); 1962}; 1963 1964/// DependentSizedExtVectorType - This type represent an extended vector type 1965/// where either the type or size is dependent. For example: 1966/// @code 1967/// template<typename T, int Size> 1968/// class vector { 1969/// typedef T __attribute__((ext_vector_type(Size))) type; 1970/// } 1971/// @endcode 1972class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1973 ASTContext &Context; 1974 Expr *SizeExpr; 1975 /// ElementType - The element type of the array. 1976 QualType ElementType; 1977 SourceLocation loc; 1978 1979 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1980 QualType can, Expr *SizeExpr, SourceLocation loc); 1981 1982 friend class ASTContext; 1983 1984public: 1985 Expr *getSizeExpr() const { return SizeExpr; } 1986 QualType getElementType() const { return ElementType; } 1987 SourceLocation getAttributeLoc() const { return loc; } 1988 1989 bool isSugared() const { return false; } 1990 QualType desugar() const { return QualType(this, 0); } 1991 1992 static bool classof(const Type *T) { 1993 return T->getTypeClass() == DependentSizedExtVector; 1994 } 1995 static bool classof(const DependentSizedExtVectorType *) { return true; } 1996 1997 void Profile(llvm::FoldingSetNodeID &ID) { 1998 Profile(ID, Context, getElementType(), getSizeExpr()); 1999 } 2000 2001 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2002 QualType ElementType, Expr *SizeExpr); 2003}; 2004 2005 2006/// VectorType - GCC generic vector type. This type is created using 2007/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2008/// bytes; or from an Altivec __vector or vector declaration. 2009/// Since the constructor takes the number of vector elements, the 2010/// client is responsible for converting the size into the number of elements. 2011class VectorType : public Type, public llvm::FoldingSetNode { 2012public: 2013 enum VectorKind { 2014 GenericVector, // not a target-specific vector type 2015 AltiVecVector, // is AltiVec vector 2016 AltiVecPixel, // is AltiVec 'vector Pixel' 2017 AltiVecBool, // is AltiVec 'vector bool ...' 2018 NeonVector, // is ARM Neon vector 2019 NeonPolyVector // is ARM Neon polynomial vector 2020 }; 2021protected: 2022 /// ElementType - The element type of the vector. 2023 QualType ElementType; 2024 2025 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2026 VectorKind vecKind); 2027 2028 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2029 QualType canonType, VectorKind vecKind); 2030 2031 friend class ASTContext; // ASTContext creates these. 2032 2033public: 2034 2035 QualType getElementType() const { return ElementType; } 2036 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2037 2038 bool isSugared() const { return false; } 2039 QualType desugar() const { return QualType(this, 0); } 2040 2041 VectorKind getVectorKind() const { 2042 return VectorKind(VectorTypeBits.VecKind); 2043 } 2044 2045 void Profile(llvm::FoldingSetNodeID &ID) { 2046 Profile(ID, getElementType(), getNumElements(), 2047 getTypeClass(), getVectorKind()); 2048 } 2049 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2050 unsigned NumElements, TypeClass TypeClass, 2051 VectorKind VecKind) { 2052 ID.AddPointer(ElementType.getAsOpaquePtr()); 2053 ID.AddInteger(NumElements); 2054 ID.AddInteger(TypeClass); 2055 ID.AddInteger(VecKind); 2056 } 2057 2058 static bool classof(const Type *T) { 2059 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2060 } 2061 static bool classof(const VectorType *) { return true; } 2062}; 2063 2064/// ExtVectorType - Extended vector type. This type is created using 2065/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2066/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2067/// class enables syntactic extensions, like Vector Components for accessing 2068/// points, colors, and textures (modeled after OpenGL Shading Language). 2069class ExtVectorType : public VectorType { 2070 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2071 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2072 friend class ASTContext; // ASTContext creates these. 2073public: 2074 static int getPointAccessorIdx(char c) { 2075 switch (c) { 2076 default: return -1; 2077 case 'x': return 0; 2078 case 'y': return 1; 2079 case 'z': return 2; 2080 case 'w': return 3; 2081 } 2082 } 2083 static int getNumericAccessorIdx(char c) { 2084 switch (c) { 2085 default: return -1; 2086 case '0': return 0; 2087 case '1': return 1; 2088 case '2': return 2; 2089 case '3': return 3; 2090 case '4': return 4; 2091 case '5': return 5; 2092 case '6': return 6; 2093 case '7': return 7; 2094 case '8': return 8; 2095 case '9': return 9; 2096 case 'A': 2097 case 'a': return 10; 2098 case 'B': 2099 case 'b': return 11; 2100 case 'C': 2101 case 'c': return 12; 2102 case 'D': 2103 case 'd': return 13; 2104 case 'E': 2105 case 'e': return 14; 2106 case 'F': 2107 case 'f': return 15; 2108 } 2109 } 2110 2111 static int getAccessorIdx(char c) { 2112 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2113 return getNumericAccessorIdx(c); 2114 } 2115 2116 bool isAccessorWithinNumElements(char c) const { 2117 if (int idx = getAccessorIdx(c)+1) 2118 return unsigned(idx-1) < getNumElements(); 2119 return false; 2120 } 2121 bool isSugared() const { return false; } 2122 QualType desugar() const { return QualType(this, 0); } 2123 2124 static bool classof(const Type *T) { 2125 return T->getTypeClass() == ExtVector; 2126 } 2127 static bool classof(const ExtVectorType *) { return true; } 2128}; 2129 2130/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2131/// class of FunctionNoProtoType and FunctionProtoType. 2132/// 2133class FunctionType : public Type { 2134 // The type returned by the function. 2135 QualType ResultType; 2136 2137 public: 2138 /// ExtInfo - A class which abstracts out some details necessary for 2139 /// making a call. 2140 /// 2141 /// It is not actually used directly for storing this information in 2142 /// a FunctionType, although FunctionType does currently use the 2143 /// same bit-pattern. 2144 /// 2145 // If you add a field (say Foo), other than the obvious places (both, 2146 // constructors, compile failures), what you need to update is 2147 // * Operator== 2148 // * getFoo 2149 // * withFoo 2150 // * functionType. Add Foo, getFoo. 2151 // * ASTContext::getFooType 2152 // * ASTContext::mergeFunctionTypes 2153 // * FunctionNoProtoType::Profile 2154 // * FunctionProtoType::Profile 2155 // * TypePrinter::PrintFunctionProto 2156 // * AST read and write 2157 // * Codegen 2158 class ExtInfo { 2159 // Feel free to rearrange or add bits, but if you go over 8, 2160 // you'll need to adjust both the Bits field below and 2161 // Type::FunctionTypeBitfields. 2162 2163 // | CC |noreturn|regparm 2164 // |0 .. 2| 3 |4 .. 6 2165 enum { CallConvMask = 0x7 }; 2166 enum { NoReturnMask = 0x8 }; 2167 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2168 RegParmOffset = 4 }; 2169 2170 unsigned char Bits; 2171 2172 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2173 2174 friend class FunctionType; 2175 2176 public: 2177 // Constructor with no defaults. Use this when you know that you 2178 // have all the elements (when reading an AST file for example). 2179 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2180 Bits = ((unsigned) cc) | 2181 (noReturn ? NoReturnMask : 0) | 2182 (regParm << RegParmOffset); 2183 } 2184 2185 // Constructor with all defaults. Use when for example creating a 2186 // function know to use defaults. 2187 ExtInfo() : Bits(0) {} 2188 2189 bool getNoReturn() const { return Bits & NoReturnMask; } 2190 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2191 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2192 2193 bool operator==(ExtInfo Other) const { 2194 return Bits == Other.Bits; 2195 } 2196 bool operator!=(ExtInfo Other) const { 2197 return Bits != Other.Bits; 2198 } 2199 2200 // Note that we don't have setters. That is by design, use 2201 // the following with methods instead of mutating these objects. 2202 2203 ExtInfo withNoReturn(bool noReturn) const { 2204 if (noReturn) 2205 return ExtInfo(Bits | NoReturnMask); 2206 else 2207 return ExtInfo(Bits & ~NoReturnMask); 2208 } 2209 2210 ExtInfo withRegParm(unsigned RegParm) const { 2211 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2212 } 2213 2214 ExtInfo withCallingConv(CallingConv cc) const { 2215 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2216 } 2217 2218 void Profile(llvm::FoldingSetNodeID &ID) const { 2219 ID.AddInteger(Bits); 2220 } 2221 }; 2222 2223protected: 2224 FunctionType(TypeClass tc, QualType res, bool variadic, 2225 unsigned typeQuals, QualType Canonical, bool Dependent, 2226 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2227 ExtInfo Info) 2228 : Type(tc, Canonical, Dependent, VariablyModified, 2229 ContainsUnexpandedParameterPack), 2230 ResultType(res) { 2231 FunctionTypeBits.ExtInfo = Info.Bits; 2232 FunctionTypeBits.Variadic = variadic; 2233 FunctionTypeBits.TypeQuals = typeQuals; 2234 } 2235 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2236 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2237public: 2238 2239 QualType getResultType() const { return ResultType; } 2240 2241 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2242 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2243 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2244 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2245 2246 /// \brief Determine the type of an expression that calls a function of 2247 /// this type. 2248 QualType getCallResultType(ASTContext &Context) const { 2249 return getResultType().getNonLValueExprType(Context); 2250 } 2251 2252 static llvm::StringRef getNameForCallConv(CallingConv CC); 2253 2254 static bool classof(const Type *T) { 2255 return T->getTypeClass() == FunctionNoProto || 2256 T->getTypeClass() == FunctionProto; 2257 } 2258 static bool classof(const FunctionType *) { return true; } 2259}; 2260 2261/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2262/// no information available about its arguments. 2263class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2264 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2265 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2266 /*Dependent=*/false, Result->isVariablyModifiedType(), 2267 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2268 2269 friend class ASTContext; // ASTContext creates these. 2270 2271public: 2272 // No additional state past what FunctionType provides. 2273 2274 bool isSugared() const { return false; } 2275 QualType desugar() const { return QualType(this, 0); } 2276 2277 void Profile(llvm::FoldingSetNodeID &ID) { 2278 Profile(ID, getResultType(), getExtInfo()); 2279 } 2280 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2281 ExtInfo Info) { 2282 Info.Profile(ID); 2283 ID.AddPointer(ResultType.getAsOpaquePtr()); 2284 } 2285 2286 static bool classof(const Type *T) { 2287 return T->getTypeClass() == FunctionNoProto; 2288 } 2289 static bool classof(const FunctionNoProtoType *) { return true; } 2290}; 2291 2292/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2293/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2294/// arguments, not as having a single void argument. Such a type can have an 2295/// exception specification, but this specification is not part of the canonical 2296/// type. 2297class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2298public: 2299 /// ExtProtoInfo - Extra information about a function prototype. 2300 struct ExtProtoInfo { 2301 ExtProtoInfo() : 2302 Variadic(false), HasExceptionSpec(false), HasAnyExceptionSpec(false), 2303 TypeQuals(0), NumExceptions(0), Exceptions(0) {} 2304 2305 FunctionType::ExtInfo ExtInfo; 2306 bool Variadic; 2307 bool HasExceptionSpec; 2308 bool HasAnyExceptionSpec; 2309 unsigned char TypeQuals; 2310 unsigned NumExceptions; 2311 const QualType *Exceptions; 2312 }; 2313 2314private: 2315 /// \brief Determine whether there are any argument types that 2316 /// contain an unexpanded parameter pack. 2317 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2318 unsigned numArgs) { 2319 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2320 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2321 return true; 2322 2323 return false; 2324 } 2325 2326 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2327 QualType canonical, const ExtProtoInfo &epi); 2328 2329 /// NumArgs - The number of arguments this function has, not counting '...'. 2330 unsigned NumArgs : 20; 2331 2332 /// NumExceptions - The number of types in the exception spec, if any. 2333 unsigned NumExceptions : 10; 2334 2335 /// HasExceptionSpec - Whether this function has an exception spec at all. 2336 unsigned HasExceptionSpec : 1; 2337 2338 /// HasAnyExceptionSpec - Whether this function has a throw(...) spec. 2339 unsigned HasAnyExceptionSpec : 1; 2340 2341 /// ArgInfo - There is an variable size array after the class in memory that 2342 /// holds the argument types. 2343 2344 /// Exceptions - There is another variable size array after ArgInfo that 2345 /// holds the exception types. 2346 2347 friend class ASTContext; // ASTContext creates these. 2348 2349public: 2350 unsigned getNumArgs() const { return NumArgs; } 2351 QualType getArgType(unsigned i) const { 2352 assert(i < NumArgs && "Invalid argument number!"); 2353 return arg_type_begin()[i]; 2354 } 2355 2356 ExtProtoInfo getExtProtoInfo() const { 2357 ExtProtoInfo EPI; 2358 EPI.ExtInfo = getExtInfo(); 2359 EPI.Variadic = isVariadic(); 2360 EPI.HasExceptionSpec = hasExceptionSpec(); 2361 EPI.HasAnyExceptionSpec = hasAnyExceptionSpec(); 2362 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2363 EPI.NumExceptions = NumExceptions; 2364 EPI.Exceptions = exception_begin(); 2365 return EPI; 2366 } 2367 2368 bool hasExceptionSpec() const { return HasExceptionSpec; } 2369 bool hasAnyExceptionSpec() const { return HasAnyExceptionSpec; } 2370 unsigned getNumExceptions() const { return NumExceptions; } 2371 QualType getExceptionType(unsigned i) const { 2372 assert(i < NumExceptions && "Invalid exception number!"); 2373 return exception_begin()[i]; 2374 } 2375 bool hasEmptyExceptionSpec() const { 2376 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2377 getNumExceptions() == 0; 2378 } 2379 2380 using FunctionType::isVariadic; 2381 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2382 2383 typedef const QualType *arg_type_iterator; 2384 arg_type_iterator arg_type_begin() const { 2385 return reinterpret_cast<const QualType *>(this+1); 2386 } 2387 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2388 2389 typedef const QualType *exception_iterator; 2390 exception_iterator exception_begin() const { 2391 // exceptions begin where arguments end 2392 return arg_type_end(); 2393 } 2394 exception_iterator exception_end() const { 2395 return exception_begin() + NumExceptions; 2396 } 2397 2398 bool isSugared() const { return false; } 2399 QualType desugar() const { return QualType(this, 0); } 2400 2401 static bool classof(const Type *T) { 2402 return T->getTypeClass() == FunctionProto; 2403 } 2404 static bool classof(const FunctionProtoType *) { return true; } 2405 2406 void Profile(llvm::FoldingSetNodeID &ID); 2407 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2408 arg_type_iterator ArgTys, unsigned NumArgs, 2409 const ExtProtoInfo &EPI); 2410}; 2411 2412 2413/// \brief Represents the dependent type named by a dependently-scoped 2414/// typename using declaration, e.g. 2415/// using typename Base<T>::foo; 2416/// Template instantiation turns these into the underlying type. 2417class UnresolvedUsingType : public Type { 2418 UnresolvedUsingTypenameDecl *Decl; 2419 2420 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2421 : Type(UnresolvedUsing, QualType(), true, false, 2422 /*ContainsUnexpandedParameterPack=*/false), 2423 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2424 friend class ASTContext; // ASTContext creates these. 2425public: 2426 2427 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2428 2429 bool isSugared() const { return false; } 2430 QualType desugar() const { return QualType(this, 0); } 2431 2432 static bool classof(const Type *T) { 2433 return T->getTypeClass() == UnresolvedUsing; 2434 } 2435 static bool classof(const UnresolvedUsingType *) { return true; } 2436 2437 void Profile(llvm::FoldingSetNodeID &ID) { 2438 return Profile(ID, Decl); 2439 } 2440 static void Profile(llvm::FoldingSetNodeID &ID, 2441 UnresolvedUsingTypenameDecl *D) { 2442 ID.AddPointer(D); 2443 } 2444}; 2445 2446 2447class TypedefType : public Type { 2448 TypedefDecl *Decl; 2449protected: 2450 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2451 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2452 /*ContainsUnexpandedParameterPack=*/false), 2453 Decl(const_cast<TypedefDecl*>(D)) { 2454 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2455 } 2456 friend class ASTContext; // ASTContext creates these. 2457public: 2458 2459 TypedefDecl *getDecl() const { return Decl; } 2460 2461 bool isSugared() const { return true; } 2462 QualType desugar() const; 2463 2464 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2465 static bool classof(const TypedefType *) { return true; } 2466}; 2467 2468/// TypeOfExprType (GCC extension). 2469class TypeOfExprType : public Type { 2470 Expr *TOExpr; 2471 2472protected: 2473 TypeOfExprType(Expr *E, QualType can = QualType()); 2474 friend class ASTContext; // ASTContext creates these. 2475public: 2476 Expr *getUnderlyingExpr() const { return TOExpr; } 2477 2478 /// \brief Remove a single level of sugar. 2479 QualType desugar() const; 2480 2481 /// \brief Returns whether this type directly provides sugar. 2482 bool isSugared() const { return true; } 2483 2484 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2485 static bool classof(const TypeOfExprType *) { return true; } 2486}; 2487 2488/// \brief Internal representation of canonical, dependent 2489/// typeof(expr) types. 2490/// 2491/// This class is used internally by the ASTContext to manage 2492/// canonical, dependent types, only. Clients will only see instances 2493/// of this class via TypeOfExprType nodes. 2494class DependentTypeOfExprType 2495 : public TypeOfExprType, public llvm::FoldingSetNode { 2496 ASTContext &Context; 2497 2498public: 2499 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2500 : TypeOfExprType(E), Context(Context) { } 2501 2502 bool isSugared() const { return false; } 2503 QualType desugar() const { return QualType(this, 0); } 2504 2505 void Profile(llvm::FoldingSetNodeID &ID) { 2506 Profile(ID, Context, getUnderlyingExpr()); 2507 } 2508 2509 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2510 Expr *E); 2511}; 2512 2513/// TypeOfType (GCC extension). 2514class TypeOfType : public Type { 2515 QualType TOType; 2516 TypeOfType(QualType T, QualType can) 2517 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2518 T->containsUnexpandedParameterPack()), 2519 TOType(T) { 2520 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2521 } 2522 friend class ASTContext; // ASTContext creates these. 2523public: 2524 QualType getUnderlyingType() const { return TOType; } 2525 2526 /// \brief Remove a single level of sugar. 2527 QualType desugar() const { return getUnderlyingType(); } 2528 2529 /// \brief Returns whether this type directly provides sugar. 2530 bool isSugared() const { return true; } 2531 2532 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2533 static bool classof(const TypeOfType *) { return true; } 2534}; 2535 2536/// DecltypeType (C++0x) 2537class DecltypeType : public Type { 2538 Expr *E; 2539 2540 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2541 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2542 // from it. 2543 QualType UnderlyingType; 2544 2545protected: 2546 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2547 friend class ASTContext; // ASTContext creates these. 2548public: 2549 Expr *getUnderlyingExpr() const { return E; } 2550 QualType getUnderlyingType() const { return UnderlyingType; } 2551 2552 /// \brief Remove a single level of sugar. 2553 QualType desugar() const { return getUnderlyingType(); } 2554 2555 /// \brief Returns whether this type directly provides sugar. 2556 bool isSugared() const { return !isDependentType(); } 2557 2558 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2559 static bool classof(const DecltypeType *) { return true; } 2560}; 2561 2562/// \brief Internal representation of canonical, dependent 2563/// decltype(expr) types. 2564/// 2565/// This class is used internally by the ASTContext to manage 2566/// canonical, dependent types, only. Clients will only see instances 2567/// of this class via DecltypeType nodes. 2568class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2569 ASTContext &Context; 2570 2571public: 2572 DependentDecltypeType(ASTContext &Context, Expr *E); 2573 2574 bool isSugared() const { return false; } 2575 QualType desugar() const { return QualType(this, 0); } 2576 2577 void Profile(llvm::FoldingSetNodeID &ID) { 2578 Profile(ID, Context, getUnderlyingExpr()); 2579 } 2580 2581 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2582 Expr *E); 2583}; 2584 2585class TagType : public Type { 2586 /// Stores the TagDecl associated with this type. The decl may point to any 2587 /// TagDecl that declares the entity. 2588 TagDecl * decl; 2589 2590protected: 2591 TagType(TypeClass TC, const TagDecl *D, QualType can); 2592 2593public: 2594 TagDecl *getDecl() const; 2595 2596 /// @brief Determines whether this type is in the process of being 2597 /// defined. 2598 bool isBeingDefined() const; 2599 2600 static bool classof(const Type *T) { 2601 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2602 } 2603 static bool classof(const TagType *) { return true; } 2604 static bool classof(const RecordType *) { return true; } 2605 static bool classof(const EnumType *) { return true; } 2606}; 2607 2608/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2609/// to detect TagType objects of structs/unions/classes. 2610class RecordType : public TagType { 2611protected: 2612 explicit RecordType(const RecordDecl *D) 2613 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2614 explicit RecordType(TypeClass TC, RecordDecl *D) 2615 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2616 friend class ASTContext; // ASTContext creates these. 2617public: 2618 2619 RecordDecl *getDecl() const { 2620 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2621 } 2622 2623 // FIXME: This predicate is a helper to QualType/Type. It needs to 2624 // recursively check all fields for const-ness. If any field is declared 2625 // const, it needs to return false. 2626 bool hasConstFields() const { return false; } 2627 2628 bool isSugared() const { return false; } 2629 QualType desugar() const { return QualType(this, 0); } 2630 2631 static bool classof(const TagType *T); 2632 static bool classof(const Type *T) { 2633 return isa<TagType>(T) && classof(cast<TagType>(T)); 2634 } 2635 static bool classof(const RecordType *) { return true; } 2636}; 2637 2638/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2639/// to detect TagType objects of enums. 2640class EnumType : public TagType { 2641 explicit EnumType(const EnumDecl *D) 2642 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2643 friend class ASTContext; // ASTContext creates these. 2644public: 2645 2646 EnumDecl *getDecl() const { 2647 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2648 } 2649 2650 bool isSugared() const { return false; } 2651 QualType desugar() const { return QualType(this, 0); } 2652 2653 static bool classof(const TagType *T); 2654 static bool classof(const Type *T) { 2655 return isa<TagType>(T) && classof(cast<TagType>(T)); 2656 } 2657 static bool classof(const EnumType *) { return true; } 2658}; 2659 2660class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2661 unsigned Depth : 15; 2662 unsigned ParameterPack : 1; 2663 unsigned Index : 16; 2664 IdentifierInfo *Name; 2665 2666 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2667 QualType Canon) 2668 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2669 /*VariablyModified=*/false, PP), 2670 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2671 2672 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2673 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2674 /*VariablyModified=*/false, PP), 2675 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2676 2677 friend class ASTContext; // ASTContext creates these 2678 2679public: 2680 unsigned getDepth() const { return Depth; } 2681 unsigned getIndex() const { return Index; } 2682 bool isParameterPack() const { return ParameterPack; } 2683 IdentifierInfo *getName() const { return Name; } 2684 2685 bool isSugared() const { return false; } 2686 QualType desugar() const { return QualType(this, 0); } 2687 2688 void Profile(llvm::FoldingSetNodeID &ID) { 2689 Profile(ID, Depth, Index, ParameterPack, Name); 2690 } 2691 2692 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2693 unsigned Index, bool ParameterPack, 2694 IdentifierInfo *Name) { 2695 ID.AddInteger(Depth); 2696 ID.AddInteger(Index); 2697 ID.AddBoolean(ParameterPack); 2698 ID.AddPointer(Name); 2699 } 2700 2701 static bool classof(const Type *T) { 2702 return T->getTypeClass() == TemplateTypeParm; 2703 } 2704 static bool classof(const TemplateTypeParmType *T) { return true; } 2705}; 2706 2707/// \brief Represents the result of substituting a type for a template 2708/// type parameter. 2709/// 2710/// Within an instantiated template, all template type parameters have 2711/// been replaced with these. They are used solely to record that a 2712/// type was originally written as a template type parameter; 2713/// therefore they are never canonical. 2714class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2715 // The original type parameter. 2716 const TemplateTypeParmType *Replaced; 2717 2718 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2719 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2720 Canon->isVariablyModifiedType(), 2721 Canon->containsUnexpandedParameterPack()), 2722 Replaced(Param) { } 2723 2724 friend class ASTContext; 2725 2726public: 2727 IdentifierInfo *getName() const { return Replaced->getName(); } 2728 2729 /// Gets the template parameter that was substituted for. 2730 const TemplateTypeParmType *getReplacedParameter() const { 2731 return Replaced; 2732 } 2733 2734 /// Gets the type that was substituted for the template 2735 /// parameter. 2736 QualType getReplacementType() const { 2737 return getCanonicalTypeInternal(); 2738 } 2739 2740 bool isSugared() const { return true; } 2741 QualType desugar() const { return getReplacementType(); } 2742 2743 void Profile(llvm::FoldingSetNodeID &ID) { 2744 Profile(ID, getReplacedParameter(), getReplacementType()); 2745 } 2746 static void Profile(llvm::FoldingSetNodeID &ID, 2747 const TemplateTypeParmType *Replaced, 2748 QualType Replacement) { 2749 ID.AddPointer(Replaced); 2750 ID.AddPointer(Replacement.getAsOpaquePtr()); 2751 } 2752 2753 static bool classof(const Type *T) { 2754 return T->getTypeClass() == SubstTemplateTypeParm; 2755 } 2756 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2757}; 2758 2759/// \brief Represents the type of a template specialization as written 2760/// in the source code. 2761/// 2762/// Template specialization types represent the syntactic form of a 2763/// template-id that refers to a type, e.g., @c vector<int>. Some 2764/// template specialization types are syntactic sugar, whose canonical 2765/// type will point to some other type node that represents the 2766/// instantiation or class template specialization. For example, a 2767/// class template specialization type of @c vector<int> will refer to 2768/// a tag type for the instantiation 2769/// @c std::vector<int, std::allocator<int>>. 2770/// 2771/// Other template specialization types, for which the template name 2772/// is dependent, may be canonical types. These types are always 2773/// dependent. 2774class TemplateSpecializationType 2775 : public Type, public llvm::FoldingSetNode { 2776 /// \brief The name of the template being specialized. 2777 TemplateName Template; 2778 2779 /// \brief - The number of template arguments named in this class 2780 /// template specialization. 2781 unsigned NumArgs; 2782 2783 TemplateSpecializationType(TemplateName T, 2784 const TemplateArgument *Args, 2785 unsigned NumArgs, QualType Canon); 2786 2787 friend class ASTContext; // ASTContext creates these 2788 2789public: 2790 /// \brief Determine whether any of the given template arguments are 2791 /// dependent. 2792 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2793 unsigned NumArgs); 2794 2795 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2796 unsigned NumArgs); 2797 2798 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2799 2800 /// \brief Print a template argument list, including the '<' and '>' 2801 /// enclosing the template arguments. 2802 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2803 unsigned NumArgs, 2804 const PrintingPolicy &Policy, 2805 bool SkipBrackets = false); 2806 2807 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2808 unsigned NumArgs, 2809 const PrintingPolicy &Policy); 2810 2811 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2812 const PrintingPolicy &Policy); 2813 2814 /// True if this template specialization type matches a current 2815 /// instantiation in the context in which it is found. 2816 bool isCurrentInstantiation() const { 2817 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2818 } 2819 2820 typedef const TemplateArgument * iterator; 2821 2822 iterator begin() const { return getArgs(); } 2823 iterator end() const; // defined inline in TemplateBase.h 2824 2825 /// \brief Retrieve the name of the template that we are specializing. 2826 TemplateName getTemplateName() const { return Template; } 2827 2828 /// \brief Retrieve the template arguments. 2829 const TemplateArgument *getArgs() const { 2830 return reinterpret_cast<const TemplateArgument *>(this + 1); 2831 } 2832 2833 /// \brief Retrieve the number of template arguments. 2834 unsigned getNumArgs() const { return NumArgs; } 2835 2836 /// \brief Retrieve a specific template argument as a type. 2837 /// \precondition @c isArgType(Arg) 2838 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2839 2840 bool isSugared() const { 2841 return !isDependentType() || isCurrentInstantiation(); 2842 } 2843 QualType desugar() const { return getCanonicalTypeInternal(); } 2844 2845 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2846 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2847 } 2848 2849 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2850 const TemplateArgument *Args, 2851 unsigned NumArgs, 2852 ASTContext &Context); 2853 2854 static bool classof(const Type *T) { 2855 return T->getTypeClass() == TemplateSpecialization; 2856 } 2857 static bool classof(const TemplateSpecializationType *T) { return true; } 2858}; 2859 2860/// \brief The injected class name of a C++ class template or class 2861/// template partial specialization. Used to record that a type was 2862/// spelled with a bare identifier rather than as a template-id; the 2863/// equivalent for non-templated classes is just RecordType. 2864/// 2865/// Injected class name types are always dependent. Template 2866/// instantiation turns these into RecordTypes. 2867/// 2868/// Injected class name types are always canonical. This works 2869/// because it is impossible to compare an injected class name type 2870/// with the corresponding non-injected template type, for the same 2871/// reason that it is impossible to directly compare template 2872/// parameters from different dependent contexts: injected class name 2873/// types can only occur within the scope of a particular templated 2874/// declaration, and within that scope every template specialization 2875/// will canonicalize to the injected class name (when appropriate 2876/// according to the rules of the language). 2877class InjectedClassNameType : public Type { 2878 CXXRecordDecl *Decl; 2879 2880 /// The template specialization which this type represents. 2881 /// For example, in 2882 /// template <class T> class A { ... }; 2883 /// this is A<T>, whereas in 2884 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2885 /// this is A<B<X,Y> >. 2886 /// 2887 /// It is always unqualified, always a template specialization type, 2888 /// and always dependent. 2889 QualType InjectedType; 2890 2891 friend class ASTContext; // ASTContext creates these. 2892 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2893 // currently suitable for AST reading, too much 2894 // interdependencies. 2895 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2896 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2897 /*VariablyModified=*/false, 2898 /*ContainsUnexpandedParameterPack=*/false), 2899 Decl(D), InjectedType(TST) { 2900 assert(isa<TemplateSpecializationType>(TST)); 2901 assert(!TST.hasQualifiers()); 2902 assert(TST->isDependentType()); 2903 } 2904 2905public: 2906 QualType getInjectedSpecializationType() const { return InjectedType; } 2907 const TemplateSpecializationType *getInjectedTST() const { 2908 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2909 } 2910 2911 CXXRecordDecl *getDecl() const; 2912 2913 bool isSugared() const { return false; } 2914 QualType desugar() const { return QualType(this, 0); } 2915 2916 static bool classof(const Type *T) { 2917 return T->getTypeClass() == InjectedClassName; 2918 } 2919 static bool classof(const InjectedClassNameType *T) { return true; } 2920}; 2921 2922/// \brief The kind of a tag type. 2923enum TagTypeKind { 2924 /// \brief The "struct" keyword. 2925 TTK_Struct, 2926 /// \brief The "union" keyword. 2927 TTK_Union, 2928 /// \brief The "class" keyword. 2929 TTK_Class, 2930 /// \brief The "enum" keyword. 2931 TTK_Enum 2932}; 2933 2934/// \brief The elaboration keyword that precedes a qualified type name or 2935/// introduces an elaborated-type-specifier. 2936enum ElaboratedTypeKeyword { 2937 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2938 ETK_Struct, 2939 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2940 ETK_Union, 2941 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2942 ETK_Class, 2943 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2944 ETK_Enum, 2945 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2946 /// \c typename T::type. 2947 ETK_Typename, 2948 /// \brief No keyword precedes the qualified type name. 2949 ETK_None 2950}; 2951 2952/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2953/// The keyword in stored in the free bits of the base class. 2954/// Also provides a few static helpers for converting and printing 2955/// elaborated type keyword and tag type kind enumerations. 2956class TypeWithKeyword : public Type { 2957protected: 2958 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2959 QualType Canonical, bool Dependent, bool VariablyModified, 2960 bool ContainsUnexpandedParameterPack) 2961 : Type(tc, Canonical, Dependent, VariablyModified, 2962 ContainsUnexpandedParameterPack) { 2963 TypeWithKeywordBits.Keyword = Keyword; 2964 } 2965 2966public: 2967 ElaboratedTypeKeyword getKeyword() const { 2968 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 2969 } 2970 2971 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2972 /// into an elaborated type keyword. 2973 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2974 2975 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2976 /// into a tag type kind. It is an error to provide a type specifier 2977 /// which *isn't* a tag kind here. 2978 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2979 2980 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2981 /// elaborated type keyword. 2982 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2983 2984 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2985 // a TagTypeKind. It is an error to provide an elaborated type keyword 2986 /// which *isn't* a tag kind here. 2987 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2988 2989 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2990 2991 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2992 2993 static const char *getTagTypeKindName(TagTypeKind Kind) { 2994 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2995 } 2996 2997 class CannotCastToThisType {}; 2998 static CannotCastToThisType classof(const Type *); 2999}; 3000 3001/// \brief Represents a type that was referred to using an elaborated type 3002/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3003/// or both. 3004/// 3005/// This type is used to keep track of a type name as written in the 3006/// source code, including tag keywords and any nested-name-specifiers. 3007/// The type itself is always "sugar", used to express what was written 3008/// in the source code but containing no additional semantic information. 3009class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3010 3011 /// \brief The nested name specifier containing the qualifier. 3012 NestedNameSpecifier *NNS; 3013 3014 /// \brief The type that this qualified name refers to. 3015 QualType NamedType; 3016 3017 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3018 QualType NamedType, QualType CanonType) 3019 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3020 NamedType->isDependentType(), 3021 NamedType->isVariablyModifiedType(), 3022 NamedType->containsUnexpandedParameterPack()), 3023 NNS(NNS), NamedType(NamedType) { 3024 assert(!(Keyword == ETK_None && NNS == 0) && 3025 "ElaboratedType cannot have elaborated type keyword " 3026 "and name qualifier both null."); 3027 } 3028 3029 friend class ASTContext; // ASTContext creates these 3030 3031public: 3032 ~ElaboratedType(); 3033 3034 /// \brief Retrieve the qualification on this type. 3035 NestedNameSpecifier *getQualifier() const { return NNS; } 3036 3037 /// \brief Retrieve the type named by the qualified-id. 3038 QualType getNamedType() const { return NamedType; } 3039 3040 /// \brief Remove a single level of sugar. 3041 QualType desugar() const { return getNamedType(); } 3042 3043 /// \brief Returns whether this type directly provides sugar. 3044 bool isSugared() const { return true; } 3045 3046 void Profile(llvm::FoldingSetNodeID &ID) { 3047 Profile(ID, getKeyword(), NNS, NamedType); 3048 } 3049 3050 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3051 NestedNameSpecifier *NNS, QualType NamedType) { 3052 ID.AddInteger(Keyword); 3053 ID.AddPointer(NNS); 3054 NamedType.Profile(ID); 3055 } 3056 3057 static bool classof(const Type *T) { 3058 return T->getTypeClass() == Elaborated; 3059 } 3060 static bool classof(const ElaboratedType *T) { return true; } 3061}; 3062 3063/// \brief Represents a qualified type name for which the type name is 3064/// dependent. 3065/// 3066/// DependentNameType represents a class of dependent types that involve a 3067/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3068/// name of a type. The DependentNameType may start with a "typename" (for a 3069/// typename-specifier), "class", "struct", "union", or "enum" (for a 3070/// dependent elaborated-type-specifier), or nothing (in contexts where we 3071/// know that we must be referring to a type, e.g., in a base class specifier). 3072class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3073 3074 /// \brief The nested name specifier containing the qualifier. 3075 NestedNameSpecifier *NNS; 3076 3077 /// \brief The type that this typename specifier refers to. 3078 const IdentifierInfo *Name; 3079 3080 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3081 const IdentifierInfo *Name, QualType CanonType) 3082 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3083 /*VariablyModified=*/false, 3084 NNS->containsUnexpandedParameterPack()), 3085 NNS(NNS), Name(Name) { 3086 assert(NNS->isDependent() && 3087 "DependentNameType requires a dependent nested-name-specifier"); 3088 } 3089 3090 friend class ASTContext; // ASTContext creates these 3091 3092public: 3093 /// \brief Retrieve the qualification on this type. 3094 NestedNameSpecifier *getQualifier() const { return NNS; } 3095 3096 /// \brief Retrieve the type named by the typename specifier as an 3097 /// identifier. 3098 /// 3099 /// This routine will return a non-NULL identifier pointer when the 3100 /// form of the original typename was terminated by an identifier, 3101 /// e.g., "typename T::type". 3102 const IdentifierInfo *getIdentifier() const { 3103 return Name; 3104 } 3105 3106 bool isSugared() const { return false; } 3107 QualType desugar() const { return QualType(this, 0); } 3108 3109 void Profile(llvm::FoldingSetNodeID &ID) { 3110 Profile(ID, getKeyword(), NNS, Name); 3111 } 3112 3113 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3114 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3115 ID.AddInteger(Keyword); 3116 ID.AddPointer(NNS); 3117 ID.AddPointer(Name); 3118 } 3119 3120 static bool classof(const Type *T) { 3121 return T->getTypeClass() == DependentName; 3122 } 3123 static bool classof(const DependentNameType *T) { return true; } 3124}; 3125 3126/// DependentTemplateSpecializationType - Represents a template 3127/// specialization type whose template cannot be resolved, e.g. 3128/// A<T>::template B<T> 3129class DependentTemplateSpecializationType : 3130 public TypeWithKeyword, public llvm::FoldingSetNode { 3131 3132 /// \brief The nested name specifier containing the qualifier. 3133 NestedNameSpecifier *NNS; 3134 3135 /// \brief The identifier of the template. 3136 const IdentifierInfo *Name; 3137 3138 /// \brief - The number of template arguments named in this class 3139 /// template specialization. 3140 unsigned NumArgs; 3141 3142 const TemplateArgument *getArgBuffer() const { 3143 return reinterpret_cast<const TemplateArgument*>(this+1); 3144 } 3145 TemplateArgument *getArgBuffer() { 3146 return reinterpret_cast<TemplateArgument*>(this+1); 3147 } 3148 3149 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3150 NestedNameSpecifier *NNS, 3151 const IdentifierInfo *Name, 3152 unsigned NumArgs, 3153 const TemplateArgument *Args, 3154 QualType Canon); 3155 3156 friend class ASTContext; // ASTContext creates these 3157 3158public: 3159 NestedNameSpecifier *getQualifier() const { return NNS; } 3160 const IdentifierInfo *getIdentifier() const { return Name; } 3161 3162 /// \brief Retrieve the template arguments. 3163 const TemplateArgument *getArgs() const { 3164 return getArgBuffer(); 3165 } 3166 3167 /// \brief Retrieve the number of template arguments. 3168 unsigned getNumArgs() const { return NumArgs; } 3169 3170 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3171 3172 typedef const TemplateArgument * iterator; 3173 iterator begin() const { return getArgs(); } 3174 iterator end() const; // inline in TemplateBase.h 3175 3176 bool isSugared() const { return false; } 3177 QualType desugar() const { return QualType(this, 0); } 3178 3179 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 3180 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3181 } 3182 3183 static void Profile(llvm::FoldingSetNodeID &ID, 3184 ASTContext &Context, 3185 ElaboratedTypeKeyword Keyword, 3186 NestedNameSpecifier *Qualifier, 3187 const IdentifierInfo *Name, 3188 unsigned NumArgs, 3189 const TemplateArgument *Args); 3190 3191 static bool classof(const Type *T) { 3192 return T->getTypeClass() == DependentTemplateSpecialization; 3193 } 3194 static bool classof(const DependentTemplateSpecializationType *T) { 3195 return true; 3196 } 3197}; 3198 3199/// \brief Represents a pack expansion of types. 3200/// 3201/// Pack expansions are part of C++0x variadic templates. A pack 3202/// expansion contains a pattern, which itself contains one or more 3203/// "unexpanded" parameter packs. When instantiated, a pack expansion 3204/// produces a series of types, each instantiated from the pattern of 3205/// the expansion, where the Ith instantiation of the pattern uses the 3206/// Ith arguments bound to each of the unexpanded parameter packs. The 3207/// pack expansion is considered to "expand" these unexpanded 3208/// parameter packs. 3209/// 3210/// \code 3211/// template<typename ...Types> struct tuple; 3212/// 3213/// template<typename ...Types> 3214/// struct tuple_of_references { 3215/// typedef tuple<Types&...> type; 3216/// }; 3217/// \endcode 3218/// 3219/// Here, the pack expansion \c Types&... is represented via a 3220/// PackExpansionType whose pattern is Types&. 3221class PackExpansionType : public Type, public llvm::FoldingSetNode { 3222 /// \brief The pattern of the pack expansion. 3223 QualType Pattern; 3224 3225 PackExpansionType(QualType Pattern, QualType Canon) 3226 : Type(PackExpansion, Canon, /*Dependent=*/true, 3227 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3228 /*ContainsUnexpandedParameterPack=*/false), 3229 Pattern(Pattern) { } 3230 3231 friend class ASTContext; // ASTContext creates these 3232 3233public: 3234 /// \brief Retrieve the pattern of this pack expansion, which is the 3235 /// type that will be repeatedly instantiated when instantiating the 3236 /// pack expansion itself. 3237 QualType getPattern() const { return Pattern; } 3238 3239 bool isSugared() const { return false; } 3240 QualType desugar() const { return QualType(this, 0); } 3241 3242 void Profile(llvm::FoldingSetNodeID &ID) { 3243 Profile(ID, getPattern()); 3244 } 3245 3246 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern) { 3247 ID.AddPointer(Pattern.getAsOpaquePtr()); 3248 } 3249 3250 static bool classof(const Type *T) { 3251 return T->getTypeClass() == PackExpansion; 3252 } 3253 static bool classof(const PackExpansionType *T) { 3254 return true; 3255 } 3256}; 3257 3258/// ObjCObjectType - Represents a class type in Objective C. 3259/// Every Objective C type is a combination of a base type and a 3260/// list of protocols. 3261/// 3262/// Given the following declarations: 3263/// @class C; 3264/// @protocol P; 3265/// 3266/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3267/// with base C and no protocols. 3268/// 3269/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3270/// 3271/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3272/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3273/// and no protocols. 3274/// 3275/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3276/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3277/// this should get its own sugar class to better represent the source. 3278class ObjCObjectType : public Type { 3279 // ObjCObjectType.NumProtocols - the number of protocols stored 3280 // after the ObjCObjectPointerType node. 3281 // 3282 // These protocols are those written directly on the type. If 3283 // protocol qualifiers ever become additive, the iterators will need 3284 // to get kindof complicated. 3285 // 3286 // In the canonical object type, these are sorted alphabetically 3287 // and uniqued. 3288 3289 /// Either a BuiltinType or an InterfaceType or sugar for either. 3290 QualType BaseType; 3291 3292 ObjCProtocolDecl * const *getProtocolStorage() const { 3293 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3294 } 3295 3296 ObjCProtocolDecl **getProtocolStorage(); 3297 3298protected: 3299 ObjCObjectType(QualType Canonical, QualType Base, 3300 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3301 3302 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3303 ObjCObjectType(enum Nonce_ObjCInterface) 3304 : Type(ObjCInterface, QualType(), false, false, false), 3305 BaseType(QualType(this_(), 0)) { 3306 ObjCObjectTypeBits.NumProtocols = 0; 3307 } 3308 3309public: 3310 /// getBaseType - Gets the base type of this object type. This is 3311 /// always (possibly sugar for) one of: 3312 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3313 /// user, which is a typedef for an ObjCPointerType) 3314 /// - the 'Class' builtin type (same caveat) 3315 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3316 QualType getBaseType() const { return BaseType; } 3317 3318 bool isObjCId() const { 3319 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3320 } 3321 bool isObjCClass() const { 3322 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3323 } 3324 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3325 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3326 bool isObjCUnqualifiedIdOrClass() const { 3327 if (!qual_empty()) return false; 3328 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3329 return T->getKind() == BuiltinType::ObjCId || 3330 T->getKind() == BuiltinType::ObjCClass; 3331 return false; 3332 } 3333 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3334 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3335 3336 /// Gets the interface declaration for this object type, if the base type 3337 /// really is an interface. 3338 ObjCInterfaceDecl *getInterface() const; 3339 3340 typedef ObjCProtocolDecl * const *qual_iterator; 3341 3342 qual_iterator qual_begin() const { return getProtocolStorage(); } 3343 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3344 3345 bool qual_empty() const { return getNumProtocols() == 0; } 3346 3347 /// getNumProtocols - Return the number of qualifying protocols in this 3348 /// interface type, or 0 if there are none. 3349 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3350 3351 /// \brief Fetch a protocol by index. 3352 ObjCProtocolDecl *getProtocol(unsigned I) const { 3353 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3354 return qual_begin()[I]; 3355 } 3356 3357 bool isSugared() const { return false; } 3358 QualType desugar() const { return QualType(this, 0); } 3359 3360 static bool classof(const Type *T) { 3361 return T->getTypeClass() == ObjCObject || 3362 T->getTypeClass() == ObjCInterface; 3363 } 3364 static bool classof(const ObjCObjectType *) { return true; } 3365}; 3366 3367/// ObjCObjectTypeImpl - A class providing a concrete implementation 3368/// of ObjCObjectType, so as to not increase the footprint of 3369/// ObjCInterfaceType. Code outside of ASTContext and the core type 3370/// system should not reference this type. 3371class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3372 friend class ASTContext; 3373 3374 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3375 // will need to be modified. 3376 3377 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3378 ObjCProtocolDecl * const *Protocols, 3379 unsigned NumProtocols) 3380 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3381 3382public: 3383 void Profile(llvm::FoldingSetNodeID &ID); 3384 static void Profile(llvm::FoldingSetNodeID &ID, 3385 QualType Base, 3386 ObjCProtocolDecl *const *protocols, 3387 unsigned NumProtocols); 3388}; 3389 3390inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3391 return reinterpret_cast<ObjCProtocolDecl**>( 3392 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3393} 3394 3395/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3396/// object oriented design. They basically correspond to C++ classes. There 3397/// are two kinds of interface types, normal interfaces like "NSString" and 3398/// qualified interfaces, which are qualified with a protocol list like 3399/// "NSString<NSCopyable, NSAmazing>". 3400/// 3401/// ObjCInterfaceType guarantees the following properties when considered 3402/// as a subtype of its superclass, ObjCObjectType: 3403/// - There are no protocol qualifiers. To reinforce this, code which 3404/// tries to invoke the protocol methods via an ObjCInterfaceType will 3405/// fail to compile. 3406/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3407/// T->getBaseType() == QualType(T, 0). 3408class ObjCInterfaceType : public ObjCObjectType { 3409 ObjCInterfaceDecl *Decl; 3410 3411 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3412 : ObjCObjectType(Nonce_ObjCInterface), 3413 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3414 friend class ASTContext; // ASTContext creates these. 3415 3416public: 3417 /// getDecl - Get the declaration of this interface. 3418 ObjCInterfaceDecl *getDecl() const { return Decl; } 3419 3420 bool isSugared() const { return false; } 3421 QualType desugar() const { return QualType(this, 0); } 3422 3423 static bool classof(const Type *T) { 3424 return T->getTypeClass() == ObjCInterface; 3425 } 3426 static bool classof(const ObjCInterfaceType *) { return true; } 3427 3428 // Nonsense to "hide" certain members of ObjCObjectType within this 3429 // class. People asking for protocols on an ObjCInterfaceType are 3430 // not going to get what they want: ObjCInterfaceTypes are 3431 // guaranteed to have no protocols. 3432 enum { 3433 qual_iterator, 3434 qual_begin, 3435 qual_end, 3436 getNumProtocols, 3437 getProtocol 3438 }; 3439}; 3440 3441inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3442 if (const ObjCInterfaceType *T = 3443 getBaseType()->getAs<ObjCInterfaceType>()) 3444 return T->getDecl(); 3445 return 0; 3446} 3447 3448/// ObjCObjectPointerType - Used to represent a pointer to an 3449/// Objective C object. These are constructed from pointer 3450/// declarators when the pointee type is an ObjCObjectType (or sugar 3451/// for one). In addition, the 'id' and 'Class' types are typedefs 3452/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3453/// are translated into these. 3454/// 3455/// Pointers to pointers to Objective C objects are still PointerTypes; 3456/// only the first level of pointer gets it own type implementation. 3457class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3458 QualType PointeeType; 3459 3460 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3461 : Type(ObjCObjectPointer, Canonical, false, false, false), 3462 PointeeType(Pointee) {} 3463 friend class ASTContext; // ASTContext creates these. 3464 3465public: 3466 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3467 /// The result will always be an ObjCObjectType or sugar thereof. 3468 QualType getPointeeType() const { return PointeeType; } 3469 3470 /// getObjCObjectType - Gets the type pointed to by this ObjC 3471 /// pointer. This method always returns non-null. 3472 /// 3473 /// This method is equivalent to getPointeeType() except that 3474 /// it discards any typedefs (or other sugar) between this 3475 /// type and the "outermost" object type. So for: 3476 /// @class A; @protocol P; @protocol Q; 3477 /// typedef A<P> AP; 3478 /// typedef A A1; 3479 /// typedef A1<P> A1P; 3480 /// typedef A1P<Q> A1PQ; 3481 /// For 'A*', getObjectType() will return 'A'. 3482 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3483 /// For 'AP*', getObjectType() will return 'A<P>'. 3484 /// For 'A1*', getObjectType() will return 'A'. 3485 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3486 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3487 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3488 /// adding protocols to a protocol-qualified base discards the 3489 /// old qualifiers (for now). But if it didn't, getObjectType() 3490 /// would return 'A1P<Q>' (and we'd have to make iterating over 3491 /// qualifiers more complicated). 3492 const ObjCObjectType *getObjectType() const { 3493 return PointeeType->getAs<ObjCObjectType>(); 3494 } 3495 3496 /// getInterfaceType - If this pointer points to an Objective C 3497 /// @interface type, gets the type for that interface. Any protocol 3498 /// qualifiers on the interface are ignored. 3499 /// 3500 /// \return null if the base type for this pointer is 'id' or 'Class' 3501 const ObjCInterfaceType *getInterfaceType() const { 3502 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3503 } 3504 3505 /// getInterfaceDecl - If this pointer points to an Objective @interface 3506 /// type, gets the declaration for that interface. 3507 /// 3508 /// \return null if the base type for this pointer is 'id' or 'Class' 3509 ObjCInterfaceDecl *getInterfaceDecl() const { 3510 return getObjectType()->getInterface(); 3511 } 3512 3513 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3514 /// its object type is the primitive 'id' type with no protocols. 3515 bool isObjCIdType() const { 3516 return getObjectType()->isObjCUnqualifiedId(); 3517 } 3518 3519 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3520 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3521 bool isObjCClassType() const { 3522 return getObjectType()->isObjCUnqualifiedClass(); 3523 } 3524 3525 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3526 /// non-empty set of protocols. 3527 bool isObjCQualifiedIdType() const { 3528 return getObjectType()->isObjCQualifiedId(); 3529 } 3530 3531 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3532 /// some non-empty set of protocols. 3533 bool isObjCQualifiedClassType() const { 3534 return getObjectType()->isObjCQualifiedClass(); 3535 } 3536 3537 /// An iterator over the qualifiers on the object type. Provided 3538 /// for convenience. This will always iterate over the full set of 3539 /// protocols on a type, not just those provided directly. 3540 typedef ObjCObjectType::qual_iterator qual_iterator; 3541 3542 qual_iterator qual_begin() const { 3543 return getObjectType()->qual_begin(); 3544 } 3545 qual_iterator qual_end() const { 3546 return getObjectType()->qual_end(); 3547 } 3548 bool qual_empty() const { return getObjectType()->qual_empty(); } 3549 3550 /// getNumProtocols - Return the number of qualifying protocols on 3551 /// the object type. 3552 unsigned getNumProtocols() const { 3553 return getObjectType()->getNumProtocols(); 3554 } 3555 3556 /// \brief Retrieve a qualifying protocol by index on the object 3557 /// type. 3558 ObjCProtocolDecl *getProtocol(unsigned I) const { 3559 return getObjectType()->getProtocol(I); 3560 } 3561 3562 bool isSugared() const { return false; } 3563 QualType desugar() const { return QualType(this, 0); } 3564 3565 void Profile(llvm::FoldingSetNodeID &ID) { 3566 Profile(ID, getPointeeType()); 3567 } 3568 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3569 ID.AddPointer(T.getAsOpaquePtr()); 3570 } 3571 static bool classof(const Type *T) { 3572 return T->getTypeClass() == ObjCObjectPointer; 3573 } 3574 static bool classof(const ObjCObjectPointerType *) { return true; } 3575}; 3576 3577/// A qualifier set is used to build a set of qualifiers. 3578class QualifierCollector : public Qualifiers { 3579public: 3580 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3581 3582 /// Collect any qualifiers on the given type and return an 3583 /// unqualified type. 3584 const Type *strip(QualType QT) { 3585 addFastQualifiers(QT.getLocalFastQualifiers()); 3586 if (QT.hasLocalNonFastQualifiers()) { 3587 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3588 addQualifiers(EQ->getQualifiers()); 3589 return EQ->getBaseType(); 3590 } 3591 return QT.getTypePtrUnsafe(); 3592 } 3593 3594 /// Apply the collected qualifiers to the given type. 3595 QualType apply(ASTContext &Context, QualType QT) const; 3596 3597 /// Apply the collected qualifiers to the given type. 3598 QualType apply(ASTContext &Context, const Type* T) const; 3599}; 3600 3601 3602// Inline function definitions. 3603 3604inline bool QualType::isCanonical() const { 3605 const Type *T = getTypePtr(); 3606 if (hasLocalQualifiers()) 3607 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3608 return T->isCanonicalUnqualified(); 3609} 3610 3611inline bool QualType::isCanonicalAsParam() const { 3612 if (hasLocalQualifiers()) return false; 3613 3614 const Type *T = getTypePtr(); 3615 if ((*this)->isPointerType()) { 3616 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3617 if (isa<VariableArrayType>(BaseType)) { 3618 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3619 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3620 if (VAT->getSizeExpr()) 3621 T = BaseType.getTypePtr(); 3622 } 3623 } 3624 return T->isCanonicalUnqualified() && 3625 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3626} 3627 3628inline bool QualType::isConstQualified() const { 3629 return isLocalConstQualified() || 3630 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3631} 3632 3633inline bool QualType::isRestrictQualified() const { 3634 return isLocalRestrictQualified() || 3635 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3636} 3637 3638 3639inline bool QualType::isVolatileQualified() const { 3640 return isLocalVolatileQualified() || 3641 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3642} 3643 3644inline bool QualType::hasQualifiers() const { 3645 return hasLocalQualifiers() || 3646 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3647} 3648 3649inline Qualifiers QualType::getQualifiers() const { 3650 Qualifiers Quals = getLocalQualifiers(); 3651 Quals.addQualifiers( 3652 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3653 return Quals; 3654} 3655 3656inline unsigned QualType::getCVRQualifiers() const { 3657 return getLocalCVRQualifiers() | 3658 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3659} 3660 3661/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3662/// type, returns them. Otherwise, if this is an array type, recurses 3663/// on the element type until some qualifiers have been found or a non-array 3664/// type reached. 3665inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3666 if (unsigned Quals = getCVRQualifiers()) 3667 return Quals; 3668 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3669 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3670 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3671 return 0; 3672} 3673 3674inline void QualType::removeLocalConst() { 3675 removeLocalFastQualifiers(Qualifiers::Const); 3676} 3677 3678inline void QualType::removeLocalRestrict() { 3679 removeLocalFastQualifiers(Qualifiers::Restrict); 3680} 3681 3682inline void QualType::removeLocalVolatile() { 3683 removeLocalFastQualifiers(Qualifiers::Volatile); 3684} 3685 3686inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 3687 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3688 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 3689 3690 // Fast path: we don't need to touch the slow qualifiers. 3691 removeLocalFastQualifiers(Mask); 3692} 3693 3694/// getAddressSpace - Return the address space of this type. 3695inline unsigned QualType::getAddressSpace() const { 3696 if (hasLocalNonFastQualifiers()) { 3697 const ExtQuals *EQ = getExtQualsUnsafe(); 3698 if (EQ->hasAddressSpace()) 3699 return EQ->getAddressSpace(); 3700 } 3701 3702 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3703 if (CT.hasLocalNonFastQualifiers()) { 3704 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3705 if (EQ->hasAddressSpace()) 3706 return EQ->getAddressSpace(); 3707 } 3708 3709 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3710 return AT->getElementType().getAddressSpace(); 3711 return 0; 3712} 3713 3714/// getObjCGCAttr - Return the gc attribute of this type. 3715inline Qualifiers::GC QualType::getObjCGCAttr() const { 3716 if (hasLocalNonFastQualifiers()) { 3717 const ExtQuals *EQ = getExtQualsUnsafe(); 3718 if (EQ->hasObjCGCAttr()) 3719 return EQ->getObjCGCAttr(); 3720 } 3721 3722 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3723 if (CT.hasLocalNonFastQualifiers()) { 3724 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3725 if (EQ->hasObjCGCAttr()) 3726 return EQ->getObjCGCAttr(); 3727 } 3728 3729 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3730 return AT->getElementType().getObjCGCAttr(); 3731 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3732 return PT->getPointeeType().getObjCGCAttr(); 3733 // We most look at all pointer types, not just pointer to interface types. 3734 if (const PointerType *PT = CT->getAs<PointerType>()) 3735 return PT->getPointeeType().getObjCGCAttr(); 3736 return Qualifiers::GCNone; 3737} 3738 3739inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3740 if (const PointerType *PT = t.getAs<PointerType>()) { 3741 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3742 return FT->getExtInfo(); 3743 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3744 return FT->getExtInfo(); 3745 3746 return FunctionType::ExtInfo(); 3747} 3748 3749inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3750 return getFunctionExtInfo(*t); 3751} 3752 3753/// \brief Determine whether this set of qualifiers is a superset of the given 3754/// set of qualifiers. 3755inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3756 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3757} 3758 3759/// isMoreQualifiedThan - Determine whether this type is more 3760/// qualified than the Other type. For example, "const volatile int" 3761/// is more qualified than "const int", "volatile int", and 3762/// "int". However, it is not more qualified than "const volatile 3763/// int". 3764inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3765 // FIXME: work on arbitrary qualifiers 3766 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3767 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3768 if (getAddressSpace() != Other.getAddressSpace()) 3769 return false; 3770 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3771} 3772 3773/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3774/// as qualified as the Other type. For example, "const volatile 3775/// int" is at least as qualified as "const int", "volatile int", 3776/// "int", and "const volatile int". 3777inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3778 // FIXME: work on arbitrary qualifiers 3779 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3780 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3781 if (getAddressSpace() != Other.getAddressSpace()) 3782 return false; 3783 return (MyQuals | OtherQuals) == MyQuals; 3784} 3785 3786/// getNonReferenceType - If Type is a reference type (e.g., const 3787/// int&), returns the type that the reference refers to ("const 3788/// int"). Otherwise, returns the type itself. This routine is used 3789/// throughout Sema to implement C++ 5p6: 3790/// 3791/// If an expression initially has the type "reference to T" (8.3.2, 3792/// 8.5.3), the type is adjusted to "T" prior to any further 3793/// analysis, the expression designates the object or function 3794/// denoted by the reference, and the expression is an lvalue. 3795inline QualType QualType::getNonReferenceType() const { 3796 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3797 return RefType->getPointeeType(); 3798 else 3799 return *this; 3800} 3801 3802inline bool Type::isFunctionType() const { 3803 return isa<FunctionType>(CanonicalType); 3804} 3805inline bool Type::isPointerType() const { 3806 return isa<PointerType>(CanonicalType); 3807} 3808inline bool Type::isAnyPointerType() const { 3809 return isPointerType() || isObjCObjectPointerType(); 3810} 3811inline bool Type::isBlockPointerType() const { 3812 return isa<BlockPointerType>(CanonicalType); 3813} 3814inline bool Type::isReferenceType() const { 3815 return isa<ReferenceType>(CanonicalType); 3816} 3817inline bool Type::isLValueReferenceType() const { 3818 return isa<LValueReferenceType>(CanonicalType); 3819} 3820inline bool Type::isRValueReferenceType() const { 3821 return isa<RValueReferenceType>(CanonicalType); 3822} 3823inline bool Type::isFunctionPointerType() const { 3824 if (const PointerType* T = getAs<PointerType>()) 3825 return T->getPointeeType()->isFunctionType(); 3826 else 3827 return false; 3828} 3829inline bool Type::isMemberPointerType() const { 3830 return isa<MemberPointerType>(CanonicalType); 3831} 3832inline bool Type::isMemberFunctionPointerType() const { 3833 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3834 return T->isMemberFunctionPointer(); 3835 else 3836 return false; 3837} 3838inline bool Type::isMemberDataPointerType() const { 3839 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3840 return T->isMemberDataPointer(); 3841 else 3842 return false; 3843} 3844inline bool Type::isArrayType() const { 3845 return isa<ArrayType>(CanonicalType); 3846} 3847inline bool Type::isConstantArrayType() const { 3848 return isa<ConstantArrayType>(CanonicalType); 3849} 3850inline bool Type::isIncompleteArrayType() const { 3851 return isa<IncompleteArrayType>(CanonicalType); 3852} 3853inline bool Type::isVariableArrayType() const { 3854 return isa<VariableArrayType>(CanonicalType); 3855} 3856inline bool Type::isDependentSizedArrayType() const { 3857 return isa<DependentSizedArrayType>(CanonicalType); 3858} 3859inline bool Type::isBuiltinType() const { 3860 return isa<BuiltinType>(CanonicalType); 3861} 3862inline bool Type::isRecordType() const { 3863 return isa<RecordType>(CanonicalType); 3864} 3865inline bool Type::isEnumeralType() const { 3866 return isa<EnumType>(CanonicalType); 3867} 3868inline bool Type::isAnyComplexType() const { 3869 return isa<ComplexType>(CanonicalType); 3870} 3871inline bool Type::isVectorType() const { 3872 return isa<VectorType>(CanonicalType); 3873} 3874inline bool Type::isExtVectorType() const { 3875 return isa<ExtVectorType>(CanonicalType); 3876} 3877inline bool Type::isObjCObjectPointerType() const { 3878 return isa<ObjCObjectPointerType>(CanonicalType); 3879} 3880inline bool Type::isObjCObjectType() const { 3881 return isa<ObjCObjectType>(CanonicalType); 3882} 3883inline bool Type::isObjCObjectOrInterfaceType() const { 3884 return isa<ObjCInterfaceType>(CanonicalType) || 3885 isa<ObjCObjectType>(CanonicalType); 3886} 3887 3888inline bool Type::isObjCQualifiedIdType() const { 3889 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3890 return OPT->isObjCQualifiedIdType(); 3891 return false; 3892} 3893inline bool Type::isObjCQualifiedClassType() const { 3894 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3895 return OPT->isObjCQualifiedClassType(); 3896 return false; 3897} 3898inline bool Type::isObjCIdType() const { 3899 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3900 return OPT->isObjCIdType(); 3901 return false; 3902} 3903inline bool Type::isObjCClassType() const { 3904 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3905 return OPT->isObjCClassType(); 3906 return false; 3907} 3908inline bool Type::isObjCSelType() const { 3909 if (const PointerType *OPT = getAs<PointerType>()) 3910 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3911 return false; 3912} 3913inline bool Type::isObjCBuiltinType() const { 3914 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3915} 3916inline bool Type::isTemplateTypeParmType() const { 3917 return isa<TemplateTypeParmType>(CanonicalType); 3918} 3919 3920inline bool Type::isSpecificBuiltinType(unsigned K) const { 3921 if (const BuiltinType *BT = getAs<BuiltinType>()) 3922 if (BT->getKind() == (BuiltinType::Kind) K) 3923 return true; 3924 return false; 3925} 3926 3927inline bool Type::isPlaceholderType() const { 3928 if (const BuiltinType *BT = getAs<BuiltinType>()) 3929 return BT->isPlaceholderType(); 3930 return false; 3931} 3932 3933/// \brief Determines whether this is a type for which one can define 3934/// an overloaded operator. 3935inline bool Type::isOverloadableType() const { 3936 return isDependentType() || isRecordType() || isEnumeralType(); 3937} 3938 3939inline bool Type::hasPointerRepresentation() const { 3940 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3941 isObjCObjectPointerType() || isNullPtrType()); 3942} 3943 3944inline bool Type::hasObjCPointerRepresentation() const { 3945 return isObjCObjectPointerType(); 3946} 3947 3948/// Insertion operator for diagnostics. This allows sending QualType's into a 3949/// diagnostic with <<. 3950inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3951 QualType T) { 3952 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3953 Diagnostic::ak_qualtype); 3954 return DB; 3955} 3956 3957/// Insertion operator for partial diagnostics. This allows sending QualType's 3958/// into a diagnostic with <<. 3959inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3960 QualType T) { 3961 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3962 Diagnostic::ak_qualtype); 3963 return PD; 3964} 3965 3966// Helper class template that is used by Type::getAs to ensure that one does 3967// not try to look through a qualified type to get to an array type. 3968template<typename T, 3969 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3970 llvm::is_base_of<ArrayType, T>::value)> 3971struct ArrayType_cannot_be_used_with_getAs { }; 3972 3973template<typename T> 3974struct ArrayType_cannot_be_used_with_getAs<T, true>; 3975 3976/// Member-template getAs<specific type>'. 3977template <typename T> const T *Type::getAs() const { 3978 ArrayType_cannot_be_used_with_getAs<T> at; 3979 (void)at; 3980 3981 // If this is directly a T type, return it. 3982 if (const T *Ty = dyn_cast<T>(this)) 3983 return Ty; 3984 3985 // If the canonical form of this type isn't the right kind, reject it. 3986 if (!isa<T>(CanonicalType)) 3987 return 0; 3988 3989 // If this is a typedef for the type, strip the typedef off without 3990 // losing all typedef information. 3991 return cast<T>(getUnqualifiedDesugaredType()); 3992} 3993 3994} // end namespace clang 3995 3996#endif 3997