Type.h revision 35495eb14f22c4e96956912e23ca2a433227ad8c
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/AST/NestedNameSpecifier.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 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 = 2, 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}; 327 328 329/// ExtQuals - We can encode up to three bits in the low bits of a 330/// type pointer, but there are many more type qualifiers that we want 331/// to be able to apply to an arbitrary type. Therefore we have this 332/// struct, intended to be heap-allocated and used by QualType to 333/// store qualifiers. 334/// 335/// The current design tags the 'const' and 'restrict' qualifiers in 336/// two low bits on the QualType pointer; a third bit records whether 337/// the pointer is an ExtQuals node. 'const' was chosen because it is 338/// orders of magnitude more common than the other two qualifiers, in 339/// both library and user code. It's relatively rare to see 340/// 'restrict' in user code, but many standard C headers are saturated 341/// with 'restrict' declarations, so that representing them efficiently 342/// is a critical goal of this representation. 343class ExtQuals : public llvm::FoldingSetNode { 344 // NOTE: changing the fast qualifiers should be straightforward as 345 // long as you don't make 'const' non-fast. 346 // 1. Qualifiers: 347 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 348 // Fast qualifiers must occupy the low-order bits. 349 // b) Update Qualifiers::FastWidth and FastMask. 350 // 2. QualType: 351 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 352 // b) Update remove{Volatile,Restrict}, defined near the end of 353 // this header. 354 // 3. ASTContext: 355 // a) Update get{Volatile,Restrict}Type. 356 357 /// Context - the context to which this set belongs. We save this 358 /// here so that QualifierCollector can use it to reapply extended 359 /// qualifiers to an arbitrary type without requiring a context to 360 /// be pushed through every single API dealing with qualifiers. 361 ASTContext& Context; 362 363 /// BaseType - the underlying type that this qualifies 364 const Type *BaseType; 365 366 /// Quals - the immutable set of qualifiers applied by this 367 /// node; always contains extended qualifiers. 368 Qualifiers Quals; 369 370public: 371 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 372 : Context(Context), BaseType(Base), Quals(Quals) 373 { 374 assert(Quals.hasNonFastQualifiers() 375 && "ExtQuals created with no fast qualifiers"); 376 assert(!Quals.hasFastQualifiers() 377 && "ExtQuals created with fast qualifiers"); 378 } 379 380 Qualifiers getQualifiers() const { return Quals; } 381 382 bool hasVolatile() const { return Quals.hasVolatile(); } 383 384 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 385 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 386 387 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 388 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 389 390 const Type *getBaseType() const { return BaseType; } 391 392 ASTContext &getContext() const { return Context; } 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}; 416 417 418/// QualType - For efficiency, we don't store CV-qualified types as nodes on 419/// their own: instead each reference to a type stores the qualifiers. This 420/// greatly reduces the number of nodes we need to allocate for types (for 421/// example we only need one for 'int', 'const int', 'volatile int', 422/// 'const volatile int', etc). 423/// 424/// As an added efficiency bonus, instead of making this a pair, we 425/// just store the two bits we care about in the low bits of the 426/// pointer. To handle the packing/unpacking, we make QualType be a 427/// simple wrapper class that acts like a smart pointer. A third bit 428/// indicates whether there are extended qualifiers present, in which 429/// case the pointer points to a special structure. 430class QualType { 431 // Thankfully, these are efficiently composable. 432 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 433 Qualifiers::FastWidth> Value; 434 435 const ExtQuals *getExtQualsUnsafe() const { 436 return Value.getPointer().get<const ExtQuals*>(); 437 } 438 439 const Type *getTypePtrUnsafe() const { 440 return Value.getPointer().get<const Type*>(); 441 } 442 443 QualType getUnqualifiedTypeSlow() const; 444 445 friend class QualifierCollector; 446public: 447 QualType() {} 448 449 QualType(const Type *Ptr, unsigned Quals) 450 : Value(Ptr, Quals) {} 451 QualType(const ExtQuals *Ptr, unsigned Quals) 452 : Value(Ptr, Quals) {} 453 454 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 455 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 456 457 /// Retrieves a pointer to the underlying (unqualified) type. 458 /// This should really return a const Type, but it's not worth 459 /// changing all the users right now. 460 Type *getTypePtr() const { 461 if (hasLocalNonFastQualifiers()) 462 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 463 return const_cast<Type*>(getTypePtrUnsafe()); 464 } 465 466 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 467 static QualType getFromOpaquePtr(void *Ptr) { 468 QualType T; 469 T.Value.setFromOpaqueValue(Ptr); 470 return T; 471 } 472 473 Type &operator*() const { 474 return *getTypePtr(); 475 } 476 477 Type *operator->() const { 478 return getTypePtr(); 479 } 480 481 bool isCanonical() const; 482 bool isCanonicalAsParam() const; 483 484 /// isNull - Return true if this QualType doesn't point to a type yet. 485 bool isNull() const { 486 return Value.getPointer().isNull(); 487 } 488 489 /// \brief Determine whether this particular QualType instance has the 490 /// "const" qualifier set, without looking through typedefs that may have 491 /// added "const" at a different level. 492 bool isLocalConstQualified() const { 493 return (getLocalFastQualifiers() & Qualifiers::Const); 494 } 495 496 /// \brief Determine whether this type is const-qualified. 497 bool isConstQualified() const; 498 499 /// \brief Determine whether this particular QualType instance has the 500 /// "restrict" qualifier set, without looking through typedefs that may have 501 /// added "restrict" at a different level. 502 bool isLocalRestrictQualified() const { 503 return (getLocalFastQualifiers() & Qualifiers::Restrict); 504 } 505 506 /// \brief Determine whether this type is restrict-qualified. 507 bool isRestrictQualified() const; 508 509 /// \brief Determine whether this particular QualType instance has the 510 /// "volatile" qualifier set, without looking through typedefs that may have 511 /// added "volatile" at a different level. 512 bool isLocalVolatileQualified() const { 513 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 514 } 515 516 /// \brief Determine whether this type is volatile-qualified. 517 bool isVolatileQualified() const; 518 519 /// \brief Determine whether this particular QualType instance has any 520 /// qualifiers, without looking through any typedefs that might add 521 /// qualifiers at a different level. 522 bool hasLocalQualifiers() const { 523 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 524 } 525 526 /// \brief Determine whether this type has any qualifiers. 527 bool hasQualifiers() const; 528 529 /// \brief Determine whether this particular QualType instance has any 530 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 531 /// instance. 532 bool hasLocalNonFastQualifiers() const { 533 return Value.getPointer().is<const ExtQuals*>(); 534 } 535 536 /// \brief Retrieve the set of qualifiers local to this particular QualType 537 /// instance, not including any qualifiers acquired through typedefs or 538 /// other sugar. 539 Qualifiers getLocalQualifiers() const { 540 Qualifiers Quals; 541 if (hasLocalNonFastQualifiers()) 542 Quals = getExtQualsUnsafe()->getQualifiers(); 543 Quals.addFastQualifiers(getLocalFastQualifiers()); 544 return Quals; 545 } 546 547 /// \brief Retrieve the set of qualifiers applied to this type. 548 Qualifiers getQualifiers() const; 549 550 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 551 /// local to this particular QualType instance, not including any qualifiers 552 /// acquired through typedefs or other sugar. 553 unsigned getLocalCVRQualifiers() const { 554 unsigned CVR = getLocalFastQualifiers(); 555 if (isLocalVolatileQualified()) 556 CVR |= Qualifiers::Volatile; 557 return CVR; 558 } 559 560 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 561 /// applied to this type. 562 unsigned getCVRQualifiers() const; 563 564 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 565 /// applied to this type, looking through any number of unqualified array 566 /// types to their element types' qualifiers. 567 unsigned getCVRQualifiersThroughArrayTypes() const; 568 569 bool isConstant(ASTContext& Ctx) const { 570 return QualType::isConstant(*this, Ctx); 571 } 572 573 // Don't promise in the API that anything besides 'const' can be 574 // easily added. 575 576 /// addConst - add the specified type qualifier to this QualType. 577 void addConst() { 578 addFastQualifiers(Qualifiers::Const); 579 } 580 QualType withConst() const { 581 return withFastQualifiers(Qualifiers::Const); 582 } 583 584 void addFastQualifiers(unsigned TQs) { 585 assert(!(TQs & ~Qualifiers::FastMask) 586 && "non-fast qualifier bits set in mask!"); 587 Value.setInt(Value.getInt() | TQs); 588 } 589 590 // FIXME: The remove* functions are semantically broken, because they might 591 // not remove a qualifier stored on a typedef. Most of the with* functions 592 // have the same problem. 593 void removeConst(); 594 void removeVolatile(); 595 void removeRestrict(); 596 void removeCVRQualifiers(unsigned Mask); 597 598 void removeFastQualifiers() { Value.setInt(0); } 599 void removeFastQualifiers(unsigned Mask) { 600 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 601 Value.setInt(Value.getInt() & ~Mask); 602 } 603 604 // Creates a type with the given qualifiers in addition to any 605 // qualifiers already on this type. 606 QualType withFastQualifiers(unsigned TQs) const { 607 QualType T = *this; 608 T.addFastQualifiers(TQs); 609 return T; 610 } 611 612 // Creates a type with exactly the given fast qualifiers, removing 613 // any existing fast qualifiers. 614 QualType withExactFastQualifiers(unsigned TQs) const { 615 return withoutFastQualifiers().withFastQualifiers(TQs); 616 } 617 618 // Removes fast qualifiers, but leaves any extended qualifiers in place. 619 QualType withoutFastQualifiers() const { 620 QualType T = *this; 621 T.removeFastQualifiers(); 622 return T; 623 } 624 625 /// \brief Return this type with all of the instance-specific qualifiers 626 /// removed, but without removing any qualifiers that may have been applied 627 /// through typedefs. 628 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 629 630 /// \brief Return the unqualified form of the given type, which might be 631 /// desugared to eliminate qualifiers introduced via typedefs. 632 QualType getUnqualifiedType() const { 633 QualType T = getLocalUnqualifiedType(); 634 if (!T.hasQualifiers()) 635 return T; 636 637 return getUnqualifiedTypeSlow(); 638 } 639 640 bool isMoreQualifiedThan(QualType Other) const; 641 bool isAtLeastAsQualifiedAs(QualType Other) const; 642 QualType getNonReferenceType() const; 643 644 /// \brief Determine the type of a (typically non-lvalue) expression with the 645 /// specified result type. 646 /// 647 /// This routine should be used for expressions for which the return type is 648 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 649 /// an lvalue. It removes a top-level reference (since there are no 650 /// expressions of reference type) and deletes top-level cvr-qualifiers 651 /// from non-class types (in C++) or all types (in C). 652 QualType getNonLValueExprType(ASTContext &Context) const; 653 654 /// getDesugaredType - Return the specified type with any "sugar" removed from 655 /// the type. This takes off typedefs, typeof's etc. If the outer level of 656 /// the type is already concrete, it returns it unmodified. This is similar 657 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 658 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 659 /// concrete. 660 /// 661 /// Qualifiers are left in place. 662 QualType getDesugaredType() const { 663 return QualType::getDesugaredType(*this); 664 } 665 666 /// operator==/!= - Indicate whether the specified types and qualifiers are 667 /// identical. 668 friend bool operator==(const QualType &LHS, const QualType &RHS) { 669 return LHS.Value == RHS.Value; 670 } 671 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 672 return LHS.Value != RHS.Value; 673 } 674 std::string getAsString() const; 675 676 std::string getAsString(const PrintingPolicy &Policy) const { 677 std::string S; 678 getAsStringInternal(S, Policy); 679 return S; 680 } 681 void getAsStringInternal(std::string &Str, 682 const PrintingPolicy &Policy) const; 683 684 void dump(const char *s) const; 685 void dump() const; 686 687 void Profile(llvm::FoldingSetNodeID &ID) const { 688 ID.AddPointer(getAsOpaquePtr()); 689 } 690 691 /// getAddressSpace - Return the address space of this type. 692 inline unsigned getAddressSpace() const; 693 694 /// GCAttrTypesAttr - Returns gc attribute of this type. 695 inline Qualifiers::GC getObjCGCAttr() const; 696 697 /// isObjCGCWeak true when Type is objc's weak. 698 bool isObjCGCWeak() const { 699 return getObjCGCAttr() == Qualifiers::Weak; 700 } 701 702 /// isObjCGCStrong true when Type is objc's strong. 703 bool isObjCGCStrong() const { 704 return getObjCGCAttr() == Qualifiers::Strong; 705 } 706 707private: 708 // These methods are implemented in a separate translation unit; 709 // "static"-ize them to avoid creating temporary QualTypes in the 710 // caller. 711 static bool isConstant(QualType T, ASTContext& Ctx); 712 static QualType getDesugaredType(QualType T); 713}; 714 715} // end clang. 716 717namespace llvm { 718/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 719/// to a specific Type class. 720template<> struct simplify_type<const ::clang::QualType> { 721 typedef ::clang::Type* SimpleType; 722 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 723 return Val.getTypePtr(); 724 } 725}; 726template<> struct simplify_type< ::clang::QualType> 727 : public simplify_type<const ::clang::QualType> {}; 728 729// Teach SmallPtrSet that QualType is "basically a pointer". 730template<> 731class PointerLikeTypeTraits<clang::QualType> { 732public: 733 static inline void *getAsVoidPointer(clang::QualType P) { 734 return P.getAsOpaquePtr(); 735 } 736 static inline clang::QualType getFromVoidPointer(void *P) { 737 return clang::QualType::getFromOpaquePtr(P); 738 } 739 // Various qualifiers go in low bits. 740 enum { NumLowBitsAvailable = 0 }; 741}; 742 743} // end namespace llvm 744 745namespace clang { 746 747/// Type - This is the base class of the type hierarchy. A central concept 748/// with types is that each type always has a canonical type. A canonical type 749/// is the type with any typedef names stripped out of it or the types it 750/// references. For example, consider: 751/// 752/// typedef int foo; 753/// typedef foo* bar; 754/// 'int *' 'foo *' 'bar' 755/// 756/// There will be a Type object created for 'int'. Since int is canonical, its 757/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 758/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 759/// there is a PointerType that represents 'int*', which, like 'int', is 760/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 761/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 762/// is also 'int*'. 763/// 764/// Non-canonical types are useful for emitting diagnostics, without losing 765/// information about typedefs being used. Canonical types are useful for type 766/// comparisons (they allow by-pointer equality tests) and useful for reasoning 767/// about whether something has a particular form (e.g. is a function type), 768/// because they implicitly, recursively, strip all typedefs out of a type. 769/// 770/// Types, once created, are immutable. 771/// 772class Type { 773public: 774 enum TypeClass { 775#define TYPE(Class, Base) Class, 776#define LAST_TYPE(Class) TypeLast = Class, 777#define ABSTRACT_TYPE(Class, Base) 778#include "clang/AST/TypeNodes.def" 779 TagFirst = Record, TagLast = Enum 780 }; 781 782private: 783 Type(const Type&); // DO NOT IMPLEMENT. 784 void operator=(const Type&); // DO NOT IMPLEMENT. 785 786 QualType CanonicalType; 787 788 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 789 unsigned TC : 8; 790 791 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 792 /// Note that this should stay at the end of the ivars for Type so that 793 /// subclasses can pack their bitfields into the same word. 794 bool Dependent : 1; 795 796 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 797 bool VariablyModified : 1; 798 799 /// \brief Whether the linkage of this type is already known. 800 mutable bool LinkageKnown : 1; 801 802 /// \brief Linkage of this type. 803 mutable unsigned CachedLinkage : 2; 804 805 /// \brief FromAST - Whether this type comes from an AST file. 806 mutable bool FromAST : 1; 807 808 /// \brief Set whether this type comes from an AST file. 809 void setFromAST(bool V = true) const { 810 FromAST = V; 811 } 812 813protected: 814 /// \brief Compute the linkage of this type along with the presence of 815 /// any local or unnamed types. 816 virtual Linkage getLinkageImpl() const; 817 818 enum { BitsRemainingInType = 19 }; 819 820 // silence VC++ warning C4355: 'this' : used in base member initializer list 821 Type *this_() { return this; } 822 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified) 823 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 824 TC(tc), Dependent(Dependent), VariablyModified(VariablyModified), 825 LinkageKnown(false), 826 CachedLinkage(NoLinkage), FromAST(false) {} 827 virtual ~Type(); 828 friend class ASTContext; 829 830 void setDependent(bool D = true) { Dependent = D; } 831 void setVariablyModified(bool VM = true) { VariablyModified = VM; } 832 833public: 834 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 835 836 /// \brief Whether this type comes from an AST file. 837 bool isFromAST() const { return FromAST; } 838 839 bool isCanonicalUnqualified() const { 840 return CanonicalType.getTypePtr() == this; 841 } 842 843 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 844 /// object types, function types, and incomplete types. 845 846 /// isIncompleteType - Return true if this is an incomplete type. 847 /// A type that can describe objects, but which lacks information needed to 848 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 849 /// routine will need to determine if the size is actually required. 850 bool isIncompleteType() const; 851 852 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 853 /// type, in other words, not a function type. 854 bool isIncompleteOrObjectType() const { 855 return !isFunctionType(); 856 } 857 858 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 859 bool isPODType() const; 860 861 /// isLiteralType - Return true if this is a literal type 862 /// (C++0x [basic.types]p10) 863 bool isLiteralType() const; 864 865 /// Helper methods to distinguish type categories. All type predicates 866 /// operate on the canonical type, ignoring typedefs and qualifiers. 867 868 /// isBuiltinType - returns true if the type is a builtin type. 869 bool isBuiltinType() const; 870 871 /// isSpecificBuiltinType - Test for a particular builtin type. 872 bool isSpecificBuiltinType(unsigned K) const; 873 874 /// isPlaceholderType - Test for a type which does not represent an 875 /// actual type-system type but is instead used as a placeholder for 876 /// various convenient purposes within Clang. All such types are 877 /// BuiltinTypes. 878 bool isPlaceholderType() const; 879 880 /// isIntegerType() does *not* include complex integers (a GCC extension). 881 /// isComplexIntegerType() can be used to test for complex integers. 882 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 883 bool isEnumeralType() const; 884 bool isBooleanType() const; 885 bool isCharType() const; 886 bool isWideCharType() const; 887 bool isAnyCharacterType() const; 888 bool isIntegralType(ASTContext &Ctx) const; 889 890 /// \brief Determine whether this type is an integral or enumeration type. 891 bool isIntegralOrEnumerationType() const; 892 /// \brief Determine whether this type is an integral or unscoped enumeration 893 /// type. 894 bool isIntegralOrUnscopedEnumerationType() const; 895 896 /// Floating point categories. 897 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 898 /// isComplexType() does *not* include complex integers (a GCC extension). 899 /// isComplexIntegerType() can be used to test for complex integers. 900 bool isComplexType() const; // C99 6.2.5p11 (complex) 901 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 902 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 903 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 904 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 905 bool isVoidType() const; // C99 6.2.5p19 906 bool isDerivedType() const; // C99 6.2.5p20 907 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 908 bool isAggregateType() const; 909 910 // Type Predicates: Check to see if this type is structurally the specified 911 // type, ignoring typedefs and qualifiers. 912 bool isFunctionType() const; 913 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 914 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 915 bool isPointerType() const; 916 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 917 bool isBlockPointerType() const; 918 bool isVoidPointerType() const; 919 bool isReferenceType() const; 920 bool isLValueReferenceType() const; 921 bool isRValueReferenceType() const; 922 bool isFunctionPointerType() const; 923 bool isMemberPointerType() const; 924 bool isMemberFunctionPointerType() const; 925 bool isMemberDataPointerType() const; 926 bool isArrayType() const; 927 bool isConstantArrayType() const; 928 bool isIncompleteArrayType() const; 929 bool isVariableArrayType() const; 930 bool isDependentSizedArrayType() const; 931 bool isRecordType() const; 932 bool isClassType() const; 933 bool isStructureType() const; 934 bool isStructureOrClassType() const; 935 bool isUnionType() const; 936 bool isComplexIntegerType() const; // GCC _Complex integer type. 937 bool isVectorType() const; // GCC vector type. 938 bool isExtVectorType() const; // Extended vector type. 939 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 940 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 941 // for the common case. 942 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 943 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 944 bool isObjCQualifiedIdType() const; // id<foo> 945 bool isObjCQualifiedClassType() const; // Class<foo> 946 bool isObjCObjectOrInterfaceType() const; 947 bool isObjCIdType() const; // id 948 bool isObjCClassType() const; // Class 949 bool isObjCSelType() const; // Class 950 bool isObjCBuiltinType() const; // 'id' or 'Class' 951 bool isTemplateTypeParmType() const; // C++ template type parameter 952 bool isNullPtrType() const; // C++0x nullptr_t 953 954 /// isDependentType - Whether this type is a dependent type, meaning 955 /// that its definition somehow depends on a template parameter 956 /// (C++ [temp.dep.type]). 957 bool isDependentType() const { return Dependent; } 958 959 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 960 bool isVariablyModifiedType() const { return VariablyModified; } 961 962 bool isOverloadableType() const; 963 964 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 965 bool isElaboratedTypeSpecifier() const; 966 967 /// hasPointerRepresentation - Whether this type is represented 968 /// natively as a pointer; this includes pointers, references, block 969 /// pointers, and Objective-C interface, qualified id, and qualified 970 /// interface types, as well as nullptr_t. 971 bool hasPointerRepresentation() const; 972 973 /// hasObjCPointerRepresentation - Whether this type can represent 974 /// an objective pointer type for the purpose of GC'ability 975 bool hasObjCPointerRepresentation() const; 976 977 /// \brief Determine whether this type has an integer representation 978 /// of some sort, e.g., it is an integer type or a vector. 979 bool hasIntegerRepresentation() const; 980 981 /// \brief Determine whether this type has an signed integer representation 982 /// of some sort, e.g., it is an signed integer type or a vector. 983 bool hasSignedIntegerRepresentation() const; 984 985 /// \brief Determine whether this type has an unsigned integer representation 986 /// of some sort, e.g., it is an unsigned integer type or a vector. 987 bool hasUnsignedIntegerRepresentation() const; 988 989 /// \brief Determine whether this type has a floating-point representation 990 /// of some sort, e.g., it is a floating-point type or a vector thereof. 991 bool hasFloatingRepresentation() const; 992 993 // Type Checking Functions: Check to see if this type is structurally the 994 // specified type, ignoring typedefs and qualifiers, and return a pointer to 995 // the best type we can. 996 const RecordType *getAsStructureType() const; 997 /// NOTE: getAs*ArrayType are methods on ASTContext. 998 const RecordType *getAsUnionType() const; 999 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1000 // The following is a convenience method that returns an ObjCObjectPointerType 1001 // for object declared using an interface. 1002 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1003 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1004 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1005 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1006 1007 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1008 /// because the type is a RecordType or because it is the injected-class-name 1009 /// type of a class template or class template partial specialization. 1010 CXXRecordDecl *getAsCXXRecordDecl() const; 1011 1012 // Member-template getAs<specific type>'. Look through sugar for 1013 // an instance of <specific type>. This scheme will eventually 1014 // replace the specific getAsXXXX methods above. 1015 // 1016 // There are some specializations of this member template listed 1017 // immediately following this class. 1018 template <typename T> const T *getAs() const; 1019 1020 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1021 /// element type of the array, potentially with type qualifiers missing. 1022 /// This method should never be used when type qualifiers are meaningful. 1023 const Type *getArrayElementTypeNoTypeQual() const; 1024 1025 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1026 /// pointer, this returns the respective pointee. 1027 QualType getPointeeType() const; 1028 1029 /// getUnqualifiedDesugaredType() - Return the specified type with 1030 /// any "sugar" removed from the type, removing any typedefs, 1031 /// typeofs, etc., as well as any qualifiers. 1032 const Type *getUnqualifiedDesugaredType() const; 1033 1034 /// More type predicates useful for type checking/promotion 1035 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1036 1037 /// isSignedIntegerType - Return true if this is an integer type that is 1038 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1039 /// an enum decl which has a signed representation, or a vector of signed 1040 /// integer element type. 1041 bool isSignedIntegerType() const; 1042 1043 /// isUnsignedIntegerType - Return true if this is an integer type that is 1044 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1045 /// decl which has an unsigned representation, or a vector of unsigned integer 1046 /// element type. 1047 bool isUnsignedIntegerType() const; 1048 1049 /// isConstantSizeType - Return true if this is not a variable sized type, 1050 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1051 /// incomplete types. 1052 bool isConstantSizeType() const; 1053 1054 /// isSpecifierType - Returns true if this type can be represented by some 1055 /// set of type specifiers. 1056 bool isSpecifierType() const; 1057 1058 /// \brief Determine the linkage of this type. 1059 Linkage getLinkage() const; 1060 1061 /// \brief Note that the linkage is no longer known. 1062 void ClearLinkageCache(); 1063 1064 const char *getTypeClassName() const; 1065 1066 QualType getCanonicalTypeInternal() const { 1067 return CanonicalType; 1068 } 1069 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1070 void dump() const; 1071 static bool classof(const Type *) { return true; } 1072 1073 friend class ASTReader; 1074 friend class ASTWriter; 1075}; 1076 1077template <> inline const TypedefType *Type::getAs() const { 1078 return dyn_cast<TypedefType>(this); 1079} 1080 1081// We can do canonical leaf types faster, because we don't have to 1082// worry about preserving child type decoration. 1083#define TYPE(Class, Base) 1084#define LEAF_TYPE(Class) \ 1085template <> inline const Class##Type *Type::getAs() const { \ 1086 return dyn_cast<Class##Type>(CanonicalType); \ 1087} 1088#include "clang/AST/TypeNodes.def" 1089 1090 1091/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1092/// types are always canonical and have a literal name field. 1093class BuiltinType : public Type { 1094public: 1095 enum Kind { 1096 Void, 1097 1098 Bool, // This is bool and/or _Bool. 1099 Char_U, // This is 'char' for targets where char is unsigned. 1100 UChar, // This is explicitly qualified unsigned char. 1101 Char16, // This is 'char16_t' for C++. 1102 Char32, // This is 'char32_t' for C++. 1103 UShort, 1104 UInt, 1105 ULong, 1106 ULongLong, 1107 UInt128, // __uint128_t 1108 1109 Char_S, // This is 'char' for targets where char is signed. 1110 SChar, // This is explicitly qualified signed char. 1111 WChar, // This is 'wchar_t' for C++. 1112 Short, 1113 Int, 1114 Long, 1115 LongLong, 1116 Int128, // __int128_t 1117 1118 Float, Double, LongDouble, 1119 1120 NullPtr, // This is the type of C++0x 'nullptr'. 1121 1122 /// This represents the type of an expression whose type is 1123 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1124 /// appear in situations where the structure of the type is 1125 /// theoretically deducible. 1126 Dependent, 1127 1128 Overload, // This represents the type of an overloaded function declaration. 1129 1130 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1131 // that has not been deduced yet. 1132 1133 /// The primitive Objective C 'id' type. The type pointed to by the 1134 /// user-visible 'id' type. Only ever shows up in an AST as the base 1135 /// type of an ObjCObjectType. 1136 ObjCId, 1137 1138 /// The primitive Objective C 'Class' type. The type pointed to by the 1139 /// user-visible 'Class' type. Only ever shows up in an AST as the 1140 /// base type of an ObjCObjectType. 1141 ObjCClass, 1142 1143 ObjCSel // This represents the ObjC 'SEL' type. 1144 }; 1145private: 1146 Kind TypeKind; 1147 1148protected: 1149 virtual Linkage getLinkageImpl() const; 1150 1151public: 1152 BuiltinType(Kind K) 1153 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1154 /*VariablyModified=*/false), 1155 TypeKind(K) {} 1156 1157 Kind getKind() const { return TypeKind; } 1158 const char *getName(const LangOptions &LO) const; 1159 1160 bool isSugared() const { return false; } 1161 QualType desugar() const { return QualType(this, 0); } 1162 1163 bool isInteger() const { 1164 return TypeKind >= Bool && TypeKind <= Int128; 1165 } 1166 1167 bool isSignedInteger() const { 1168 return TypeKind >= Char_S && TypeKind <= Int128; 1169 } 1170 1171 bool isUnsignedInteger() const { 1172 return TypeKind >= Bool && TypeKind <= UInt128; 1173 } 1174 1175 bool isFloatingPoint() const { 1176 return TypeKind >= Float && TypeKind <= LongDouble; 1177 } 1178 1179 /// Determines whether this type is a "forbidden" placeholder type, 1180 /// i.e. a type which cannot appear in arbitrary positions in a 1181 /// fully-formed expression. 1182 bool isPlaceholderType() const { 1183 return TypeKind == Overload || 1184 TypeKind == UndeducedAuto; 1185 } 1186 1187 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1188 static bool classof(const BuiltinType *) { return true; } 1189}; 1190 1191/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1192/// types (_Complex float etc) as well as the GCC integer complex extensions. 1193/// 1194class ComplexType : public Type, public llvm::FoldingSetNode { 1195 QualType ElementType; 1196 ComplexType(QualType Element, QualType CanonicalPtr) : 1197 Type(Complex, CanonicalPtr, Element->isDependentType(), 1198 Element->isVariablyModifiedType()), 1199 ElementType(Element) { 1200 } 1201 friend class ASTContext; // ASTContext creates these. 1202 1203protected: 1204 virtual Linkage getLinkageImpl() const; 1205 1206public: 1207 QualType getElementType() const { return ElementType; } 1208 1209 bool isSugared() const { return false; } 1210 QualType desugar() const { return QualType(this, 0); } 1211 1212 void Profile(llvm::FoldingSetNodeID &ID) { 1213 Profile(ID, getElementType()); 1214 } 1215 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1216 ID.AddPointer(Element.getAsOpaquePtr()); 1217 } 1218 1219 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1220 static bool classof(const ComplexType *) { return true; } 1221}; 1222 1223/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1224/// 1225class PointerType : public Type, public llvm::FoldingSetNode { 1226 QualType PointeeType; 1227 1228 PointerType(QualType Pointee, QualType CanonicalPtr) : 1229 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1230 Pointee->isVariablyModifiedType()), 1231 PointeeType(Pointee) { 1232 } 1233 friend class ASTContext; // ASTContext creates these. 1234 1235protected: 1236 virtual Linkage getLinkageImpl() const; 1237 1238public: 1239 1240 QualType getPointeeType() const { return PointeeType; } 1241 1242 bool isSugared() const { return false; } 1243 QualType desugar() const { return QualType(this, 0); } 1244 1245 void Profile(llvm::FoldingSetNodeID &ID) { 1246 Profile(ID, getPointeeType()); 1247 } 1248 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1249 ID.AddPointer(Pointee.getAsOpaquePtr()); 1250 } 1251 1252 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1253 static bool classof(const PointerType *) { return true; } 1254}; 1255 1256/// BlockPointerType - pointer to a block type. 1257/// This type is to represent types syntactically represented as 1258/// "void (^)(int)", etc. Pointee is required to always be a function type. 1259/// 1260class BlockPointerType : public Type, public llvm::FoldingSetNode { 1261 QualType PointeeType; // Block is some kind of pointer type 1262 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1263 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1264 Pointee->isVariablyModifiedType()), 1265 PointeeType(Pointee) { 1266 } 1267 friend class ASTContext; // ASTContext creates these. 1268 1269protected: 1270 virtual Linkage getLinkageImpl() const; 1271 1272public: 1273 1274 // Get the pointee type. Pointee is required to always be a function type. 1275 QualType getPointeeType() const { return PointeeType; } 1276 1277 bool isSugared() const { return false; } 1278 QualType desugar() const { return QualType(this, 0); } 1279 1280 void Profile(llvm::FoldingSetNodeID &ID) { 1281 Profile(ID, getPointeeType()); 1282 } 1283 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1284 ID.AddPointer(Pointee.getAsOpaquePtr()); 1285 } 1286 1287 static bool classof(const Type *T) { 1288 return T->getTypeClass() == BlockPointer; 1289 } 1290 static bool classof(const BlockPointerType *) { return true; } 1291}; 1292 1293/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1294/// 1295class ReferenceType : public Type, public llvm::FoldingSetNode { 1296 QualType PointeeType; 1297 1298 /// True if the type was originally spelled with an lvalue sigil. 1299 /// This is never true of rvalue references but can also be false 1300 /// on lvalue references because of C++0x [dcl.typedef]p9, 1301 /// as follows: 1302 /// 1303 /// typedef int &ref; // lvalue, spelled lvalue 1304 /// typedef int &&rvref; // rvalue 1305 /// ref &a; // lvalue, inner ref, spelled lvalue 1306 /// ref &&a; // lvalue, inner ref 1307 /// rvref &a; // lvalue, inner ref, spelled lvalue 1308 /// rvref &&a; // rvalue, inner ref 1309 bool SpelledAsLValue; 1310 1311 /// True if the inner type is a reference type. This only happens 1312 /// in non-canonical forms. 1313 bool InnerRef; 1314 1315protected: 1316 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1317 bool SpelledAsLValue) : 1318 Type(tc, CanonicalRef, Referencee->isDependentType(), 1319 Referencee->isVariablyModifiedType()), 1320 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1321 InnerRef(Referencee->isReferenceType()) { 1322 } 1323 1324 virtual Linkage getLinkageImpl() const; 1325 1326public: 1327 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1328 bool isInnerRef() const { return InnerRef; } 1329 1330 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1331 QualType getPointeeType() const { 1332 // FIXME: this might strip inner qualifiers; okay? 1333 const ReferenceType *T = this; 1334 while (T->InnerRef) 1335 T = T->PointeeType->getAs<ReferenceType>(); 1336 return T->PointeeType; 1337 } 1338 1339 void Profile(llvm::FoldingSetNodeID &ID) { 1340 Profile(ID, PointeeType, SpelledAsLValue); 1341 } 1342 static void Profile(llvm::FoldingSetNodeID &ID, 1343 QualType Referencee, 1344 bool SpelledAsLValue) { 1345 ID.AddPointer(Referencee.getAsOpaquePtr()); 1346 ID.AddBoolean(SpelledAsLValue); 1347 } 1348 1349 static bool classof(const Type *T) { 1350 return T->getTypeClass() == LValueReference || 1351 T->getTypeClass() == RValueReference; 1352 } 1353 static bool classof(const ReferenceType *) { return true; } 1354}; 1355 1356/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1357/// 1358class LValueReferenceType : public ReferenceType { 1359 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1360 bool SpelledAsLValue) : 1361 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1362 {} 1363 friend class ASTContext; // ASTContext creates these 1364public: 1365 bool isSugared() const { return false; } 1366 QualType desugar() const { return QualType(this, 0); } 1367 1368 static bool classof(const Type *T) { 1369 return T->getTypeClass() == LValueReference; 1370 } 1371 static bool classof(const LValueReferenceType *) { return true; } 1372}; 1373 1374/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1375/// 1376class RValueReferenceType : public ReferenceType { 1377 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1378 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1379 } 1380 friend class ASTContext; // ASTContext creates these 1381public: 1382 bool isSugared() const { return false; } 1383 QualType desugar() const { return QualType(this, 0); } 1384 1385 static bool classof(const Type *T) { 1386 return T->getTypeClass() == RValueReference; 1387 } 1388 static bool classof(const RValueReferenceType *) { return true; } 1389}; 1390 1391/// MemberPointerType - C++ 8.3.3 - Pointers to members 1392/// 1393class MemberPointerType : public Type, public llvm::FoldingSetNode { 1394 QualType PointeeType; 1395 /// The class of which the pointee is a member. Must ultimately be a 1396 /// RecordType, but could be a typedef or a template parameter too. 1397 const Type *Class; 1398 1399 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1400 Type(MemberPointer, CanonicalPtr, 1401 Cls->isDependentType() || Pointee->isDependentType(), 1402 Pointee->isVariablyModifiedType()), 1403 PointeeType(Pointee), Class(Cls) { 1404 } 1405 friend class ASTContext; // ASTContext creates these. 1406 1407protected: 1408 virtual Linkage getLinkageImpl() const; 1409 1410public: 1411 QualType getPointeeType() const { return PointeeType; } 1412 1413 /// Returns true if the member type (i.e. the pointee type) is a 1414 /// function type rather than a data-member type. 1415 bool isMemberFunctionPointer() const { 1416 return PointeeType->isFunctionProtoType(); 1417 } 1418 1419 /// Returns true if the member type (i.e. the pointee type) is a 1420 /// data type rather than a function type. 1421 bool isMemberDataPointer() const { 1422 return !PointeeType->isFunctionProtoType(); 1423 } 1424 1425 const Type *getClass() const { return Class; } 1426 1427 bool isSugared() const { return false; } 1428 QualType desugar() const { return QualType(this, 0); } 1429 1430 void Profile(llvm::FoldingSetNodeID &ID) { 1431 Profile(ID, getPointeeType(), getClass()); 1432 } 1433 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1434 const Type *Class) { 1435 ID.AddPointer(Pointee.getAsOpaquePtr()); 1436 ID.AddPointer(Class); 1437 } 1438 1439 static bool classof(const Type *T) { 1440 return T->getTypeClass() == MemberPointer; 1441 } 1442 static bool classof(const MemberPointerType *) { return true; } 1443}; 1444 1445/// ArrayType - C99 6.7.5.2 - Array Declarators. 1446/// 1447class ArrayType : public Type, public llvm::FoldingSetNode { 1448public: 1449 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1450 /// an array with a static size (e.g. int X[static 4]), or an array 1451 /// with a star size (e.g. int X[*]). 1452 /// 'static' is only allowed on function parameters. 1453 enum ArraySizeModifier { 1454 Normal, Static, Star 1455 }; 1456private: 1457 /// ElementType - The element type of the array. 1458 QualType ElementType; 1459 1460 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1461 /// NOTE: These fields are packed into the bitfields space in the Type class. 1462 unsigned SizeModifier : 2; 1463 1464 /// IndexTypeQuals - Capture qualifiers in declarations like: 1465 /// 'int X[static restrict 4]'. For function parameters only. 1466 unsigned IndexTypeQuals : 3; 1467 1468protected: 1469 // C++ [temp.dep.type]p1: 1470 // A type is dependent if it is... 1471 // - an array type constructed from any dependent type or whose 1472 // size is specified by a constant expression that is 1473 // value-dependent, 1474 ArrayType(TypeClass tc, QualType et, QualType can, 1475 ArraySizeModifier sm, unsigned tq) 1476 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1477 (tc == VariableArray || et->isVariablyModifiedType())), 1478 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1479 1480 friend class ASTContext; // ASTContext creates these. 1481 1482 virtual Linkage getLinkageImpl() const; 1483 1484public: 1485 QualType getElementType() const { return ElementType; } 1486 ArraySizeModifier getSizeModifier() const { 1487 return ArraySizeModifier(SizeModifier); 1488 } 1489 Qualifiers getIndexTypeQualifiers() const { 1490 return Qualifiers::fromCVRMask(IndexTypeQuals); 1491 } 1492 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1493 1494 static bool classof(const Type *T) { 1495 return T->getTypeClass() == ConstantArray || 1496 T->getTypeClass() == VariableArray || 1497 T->getTypeClass() == IncompleteArray || 1498 T->getTypeClass() == DependentSizedArray; 1499 } 1500 static bool classof(const ArrayType *) { return true; } 1501}; 1502 1503/// ConstantArrayType - This class represents the canonical version of 1504/// C arrays with a specified constant size. For example, the canonical 1505/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1506/// type is 'int' and the size is 404. 1507class ConstantArrayType : public ArrayType { 1508 llvm::APInt Size; // Allows us to unique the type. 1509 1510 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1511 ArraySizeModifier sm, unsigned tq) 1512 : ArrayType(ConstantArray, et, can, sm, tq), 1513 Size(size) {} 1514protected: 1515 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1516 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1517 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1518 friend class ASTContext; // ASTContext creates these. 1519public: 1520 const llvm::APInt &getSize() const { return Size; } 1521 bool isSugared() const { return false; } 1522 QualType desugar() const { return QualType(this, 0); } 1523 1524 1525 /// \brief Determine the number of bits required to address a member of 1526 // an array with the given element type and number of elements. 1527 static unsigned getNumAddressingBits(ASTContext &Context, 1528 QualType ElementType, 1529 const llvm::APInt &NumElements); 1530 1531 /// \brief Determine the maximum number of active bits that an array's size 1532 /// can require, which limits the maximum size of the array. 1533 static unsigned getMaxSizeBits(ASTContext &Context); 1534 1535 void Profile(llvm::FoldingSetNodeID &ID) { 1536 Profile(ID, getElementType(), getSize(), 1537 getSizeModifier(), getIndexTypeCVRQualifiers()); 1538 } 1539 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1540 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1541 unsigned TypeQuals) { 1542 ID.AddPointer(ET.getAsOpaquePtr()); 1543 ID.AddInteger(ArraySize.getZExtValue()); 1544 ID.AddInteger(SizeMod); 1545 ID.AddInteger(TypeQuals); 1546 } 1547 static bool classof(const Type *T) { 1548 return T->getTypeClass() == ConstantArray; 1549 } 1550 static bool classof(const ConstantArrayType *) { return true; } 1551}; 1552 1553/// IncompleteArrayType - This class represents C arrays with an unspecified 1554/// size. For example 'int A[]' has an IncompleteArrayType where the element 1555/// type is 'int' and the size is unspecified. 1556class IncompleteArrayType : public ArrayType { 1557 1558 IncompleteArrayType(QualType et, QualType can, 1559 ArraySizeModifier sm, unsigned tq) 1560 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1561 friend class ASTContext; // ASTContext creates these. 1562public: 1563 bool isSugared() const { return false; } 1564 QualType desugar() const { return QualType(this, 0); } 1565 1566 static bool classof(const Type *T) { 1567 return T->getTypeClass() == IncompleteArray; 1568 } 1569 static bool classof(const IncompleteArrayType *) { return true; } 1570 1571 friend class StmtIteratorBase; 1572 1573 void Profile(llvm::FoldingSetNodeID &ID) { 1574 Profile(ID, getElementType(), getSizeModifier(), 1575 getIndexTypeCVRQualifiers()); 1576 } 1577 1578 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1579 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1580 ID.AddPointer(ET.getAsOpaquePtr()); 1581 ID.AddInteger(SizeMod); 1582 ID.AddInteger(TypeQuals); 1583 } 1584}; 1585 1586/// VariableArrayType - This class represents C arrays with a specified size 1587/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1588/// Since the size expression is an arbitrary expression, we store it as such. 1589/// 1590/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1591/// should not be: two lexically equivalent variable array types could mean 1592/// different things, for example, these variables do not have the same type 1593/// dynamically: 1594/// 1595/// void foo(int x) { 1596/// int Y[x]; 1597/// ++x; 1598/// int Z[x]; 1599/// } 1600/// 1601class VariableArrayType : public ArrayType { 1602 /// SizeExpr - An assignment expression. VLA's are only permitted within 1603 /// a function block. 1604 Stmt *SizeExpr; 1605 /// Brackets - The left and right array brackets. 1606 SourceRange Brackets; 1607 1608 VariableArrayType(QualType et, QualType can, Expr *e, 1609 ArraySizeModifier sm, unsigned tq, 1610 SourceRange brackets) 1611 : ArrayType(VariableArray, et, can, sm, tq), 1612 SizeExpr((Stmt*) e), Brackets(brackets) {} 1613 friend class ASTContext; // ASTContext creates these. 1614 1615public: 1616 Expr *getSizeExpr() const { 1617 // We use C-style casts instead of cast<> here because we do not wish 1618 // to have a dependency of Type.h on Stmt.h/Expr.h. 1619 return (Expr*) SizeExpr; 1620 } 1621 SourceRange getBracketsRange() const { return Brackets; } 1622 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1623 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1624 1625 bool isSugared() const { return false; } 1626 QualType desugar() const { return QualType(this, 0); } 1627 1628 static bool classof(const Type *T) { 1629 return T->getTypeClass() == VariableArray; 1630 } 1631 static bool classof(const VariableArrayType *) { return true; } 1632 1633 friend class StmtIteratorBase; 1634 1635 void Profile(llvm::FoldingSetNodeID &ID) { 1636 assert(0 && "Cannnot unique VariableArrayTypes."); 1637 } 1638}; 1639 1640/// DependentSizedArrayType - This type represents an array type in 1641/// C++ whose size is a value-dependent expression. For example: 1642/// 1643/// \code 1644/// template<typename T, int Size> 1645/// class array { 1646/// T data[Size]; 1647/// }; 1648/// \endcode 1649/// 1650/// For these types, we won't actually know what the array bound is 1651/// until template instantiation occurs, at which point this will 1652/// become either a ConstantArrayType or a VariableArrayType. 1653class DependentSizedArrayType : public ArrayType { 1654 ASTContext &Context; 1655 1656 /// \brief An assignment expression that will instantiate to the 1657 /// size of the array. 1658 /// 1659 /// The expression itself might be NULL, in which case the array 1660 /// type will have its size deduced from an initializer. 1661 Stmt *SizeExpr; 1662 1663 /// Brackets - The left and right array brackets. 1664 SourceRange Brackets; 1665 1666 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1667 Expr *e, ArraySizeModifier sm, unsigned tq, 1668 SourceRange brackets) 1669 : ArrayType(DependentSizedArray, et, can, sm, tq), 1670 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1671 friend class ASTContext; // ASTContext creates these. 1672 1673public: 1674 Expr *getSizeExpr() const { 1675 // We use C-style casts instead of cast<> here because we do not wish 1676 // to have a dependency of Type.h on Stmt.h/Expr.h. 1677 return (Expr*) SizeExpr; 1678 } 1679 SourceRange getBracketsRange() const { return Brackets; } 1680 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1681 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1682 1683 bool isSugared() const { return false; } 1684 QualType desugar() const { return QualType(this, 0); } 1685 1686 static bool classof(const Type *T) { 1687 return T->getTypeClass() == DependentSizedArray; 1688 } 1689 static bool classof(const DependentSizedArrayType *) { return true; } 1690 1691 friend class StmtIteratorBase; 1692 1693 1694 void Profile(llvm::FoldingSetNodeID &ID) { 1695 Profile(ID, Context, getElementType(), 1696 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1697 } 1698 1699 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1700 QualType ET, ArraySizeModifier SizeMod, 1701 unsigned TypeQuals, Expr *E); 1702}; 1703 1704/// DependentSizedExtVectorType - This type represent an extended vector type 1705/// where either the type or size is dependent. For example: 1706/// @code 1707/// template<typename T, int Size> 1708/// class vector { 1709/// typedef T __attribute__((ext_vector_type(Size))) type; 1710/// } 1711/// @endcode 1712class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1713 ASTContext &Context; 1714 Expr *SizeExpr; 1715 /// ElementType - The element type of the array. 1716 QualType ElementType; 1717 SourceLocation loc; 1718 1719 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1720 QualType can, Expr *SizeExpr, SourceLocation loc) 1721 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 1722 ElementType->isVariablyModifiedType()), 1723 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1724 loc(loc) {} 1725 friend class ASTContext; 1726 1727public: 1728 Expr *getSizeExpr() const { return SizeExpr; } 1729 QualType getElementType() const { return ElementType; } 1730 SourceLocation getAttributeLoc() const { return loc; } 1731 1732 bool isSugared() const { return false; } 1733 QualType desugar() const { return QualType(this, 0); } 1734 1735 static bool classof(const Type *T) { 1736 return T->getTypeClass() == DependentSizedExtVector; 1737 } 1738 static bool classof(const DependentSizedExtVectorType *) { return true; } 1739 1740 void Profile(llvm::FoldingSetNodeID &ID) { 1741 Profile(ID, Context, getElementType(), getSizeExpr()); 1742 } 1743 1744 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1745 QualType ElementType, Expr *SizeExpr); 1746}; 1747 1748 1749/// VectorType - GCC generic vector type. This type is created using 1750/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1751/// bytes; or from an Altivec __vector or vector declaration. 1752/// Since the constructor takes the number of vector elements, the 1753/// client is responsible for converting the size into the number of elements. 1754class VectorType : public Type, public llvm::FoldingSetNode { 1755public: 1756 enum AltiVecSpecific { 1757 NotAltiVec, // is not AltiVec vector 1758 AltiVec, // is AltiVec vector 1759 Pixel, // is AltiVec 'vector Pixel' 1760 Bool // is AltiVec 'vector bool ...' 1761 }; 1762protected: 1763 /// ElementType - The element type of the vector. 1764 QualType ElementType; 1765 1766 /// NumElements - The number of elements in the vector. 1767 unsigned NumElements; 1768 1769 AltiVecSpecific AltiVecSpec; 1770 1771 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1772 AltiVecSpecific altiVecSpec) : 1773 Type(Vector, canonType, vecType->isDependentType(), 1774 vecType->isVariablyModifiedType()), 1775 ElementType(vecType), NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1776 1777 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1778 QualType canonType, AltiVecSpecific altiVecSpec) 1779 : Type(tc, canonType, vecType->isDependentType(), 1780 vecType->isVariablyModifiedType()), 1781 ElementType(vecType), 1782 NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1783 friend class ASTContext; // ASTContext creates these. 1784 1785 virtual Linkage getLinkageImpl() const; 1786 1787public: 1788 1789 QualType getElementType() const { return ElementType; } 1790 unsigned getNumElements() const { return NumElements; } 1791 1792 bool isSugared() const { return false; } 1793 QualType desugar() const { return QualType(this, 0); } 1794 1795 AltiVecSpecific getAltiVecSpecific() const { return AltiVecSpec; } 1796 1797 void Profile(llvm::FoldingSetNodeID &ID) { 1798 Profile(ID, getElementType(), getNumElements(), getTypeClass(), AltiVecSpec); 1799 } 1800 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1801 unsigned NumElements, TypeClass TypeClass, 1802 unsigned AltiVecSpec) { 1803 ID.AddPointer(ElementType.getAsOpaquePtr()); 1804 ID.AddInteger(NumElements); 1805 ID.AddInteger(TypeClass); 1806 ID.AddInteger(AltiVecSpec); 1807 } 1808 1809 static bool classof(const Type *T) { 1810 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1811 } 1812 static bool classof(const VectorType *) { return true; } 1813}; 1814 1815/// ExtVectorType - Extended vector type. This type is created using 1816/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1817/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1818/// class enables syntactic extensions, like Vector Components for accessing 1819/// points, colors, and textures (modeled after OpenGL Shading Language). 1820class ExtVectorType : public VectorType { 1821 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1822 VectorType(ExtVector, vecType, nElements, canonType, NotAltiVec) {} 1823 friend class ASTContext; // ASTContext creates these. 1824public: 1825 static int getPointAccessorIdx(char c) { 1826 switch (c) { 1827 default: return -1; 1828 case 'x': return 0; 1829 case 'y': return 1; 1830 case 'z': return 2; 1831 case 'w': return 3; 1832 } 1833 } 1834 static int getNumericAccessorIdx(char c) { 1835 switch (c) { 1836 default: return -1; 1837 case '0': return 0; 1838 case '1': return 1; 1839 case '2': return 2; 1840 case '3': return 3; 1841 case '4': return 4; 1842 case '5': return 5; 1843 case '6': return 6; 1844 case '7': return 7; 1845 case '8': return 8; 1846 case '9': return 9; 1847 case 'A': 1848 case 'a': return 10; 1849 case 'B': 1850 case 'b': return 11; 1851 case 'C': 1852 case 'c': return 12; 1853 case 'D': 1854 case 'd': return 13; 1855 case 'E': 1856 case 'e': return 14; 1857 case 'F': 1858 case 'f': return 15; 1859 } 1860 } 1861 1862 static int getAccessorIdx(char c) { 1863 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1864 return getNumericAccessorIdx(c); 1865 } 1866 1867 bool isAccessorWithinNumElements(char c) const { 1868 if (int idx = getAccessorIdx(c)+1) 1869 return unsigned(idx-1) < NumElements; 1870 return false; 1871 } 1872 bool isSugared() const { return false; } 1873 QualType desugar() const { return QualType(this, 0); } 1874 1875 static bool classof(const Type *T) { 1876 return T->getTypeClass() == ExtVector; 1877 } 1878 static bool classof(const ExtVectorType *) { return true; } 1879}; 1880 1881/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1882/// class of FunctionNoProtoType and FunctionProtoType. 1883/// 1884class FunctionType : public Type { 1885 virtual void ANCHOR(); // Key function for FunctionType. 1886 1887 /// SubClassData - This field is owned by the subclass, put here to pack 1888 /// tightly with the ivars in Type. 1889 bool SubClassData : 1; 1890 1891 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1892 /// other bitfields. 1893 /// The qualifiers are part of FunctionProtoType because... 1894 /// 1895 /// C++ 8.3.5p4: The return type, the parameter type list and the 1896 /// cv-qualifier-seq, [...], are part of the function type. 1897 /// 1898 unsigned TypeQuals : 3; 1899 1900 /// NoReturn - Indicates if the function type is attribute noreturn. 1901 unsigned NoReturn : 1; 1902 1903 /// RegParm - How many arguments to pass inreg. 1904 unsigned RegParm : 3; 1905 1906 /// CallConv - The calling convention used by the function. 1907 unsigned CallConv : 3; 1908 1909 // The type returned by the function. 1910 QualType ResultType; 1911 1912 public: 1913 // This class is used for passing arround the information needed to 1914 // construct a call. It is not actually used for storage, just for 1915 // factoring together common arguments. 1916 // If you add a field (say Foo), other than the obvious places (both, constructors, 1917 // compile failures), what you need to update is 1918 // * Operetor== 1919 // * getFoo 1920 // * withFoo 1921 // * functionType. Add Foo, getFoo. 1922 // * ASTContext::getFooType 1923 // * ASTContext::mergeFunctionTypes 1924 // * FunctionNoProtoType::Profile 1925 // * FunctionProtoType::Profile 1926 // * TypePrinter::PrintFunctionProto 1927 // * AST read and write 1928 // * Codegen 1929 1930 class ExtInfo { 1931 public: 1932 // Constructor with no defaults. Use this when you know that you 1933 // have all the elements (when reading an AST file for example). 1934 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1935 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1936 1937 // Constructor with all defaults. Use when for example creating a 1938 // function know to use defaults. 1939 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1940 1941 bool getNoReturn() const { return NoReturn; } 1942 unsigned getRegParm() const { return RegParm; } 1943 CallingConv getCC() const { return CC; } 1944 1945 bool operator==(const ExtInfo &Other) const { 1946 return getNoReturn() == Other.getNoReturn() && 1947 getRegParm() == Other.getRegParm() && 1948 getCC() == Other.getCC(); 1949 } 1950 bool operator!=(const ExtInfo &Other) const { 1951 return !(*this == Other); 1952 } 1953 1954 // Note that we don't have setters. That is by design, use 1955 // the following with methods instead of mutating these objects. 1956 1957 ExtInfo withNoReturn(bool noReturn) const { 1958 return ExtInfo(noReturn, getRegParm(), getCC()); 1959 } 1960 1961 ExtInfo withRegParm(unsigned RegParm) const { 1962 return ExtInfo(getNoReturn(), RegParm, getCC()); 1963 } 1964 1965 ExtInfo withCallingConv(CallingConv cc) const { 1966 return ExtInfo(getNoReturn(), getRegParm(), cc); 1967 } 1968 1969 private: 1970 // True if we have __attribute__((noreturn)) 1971 bool NoReturn; 1972 // The value passed to __attribute__((regparm(x))) 1973 unsigned RegParm; 1974 // The calling convention as specified via 1975 // __attribute__((cdecl|stdcall|fastcall|thiscall|pascal)) 1976 CallingConv CC; 1977 }; 1978 1979protected: 1980 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1981 unsigned typeQuals, QualType Canonical, bool Dependent, 1982 bool VariablyModified, const ExtInfo &Info) 1983 : Type(tc, Canonical, Dependent, VariablyModified), 1984 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1985 NoReturn(Info.getNoReturn()), 1986 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1987 bool getSubClassData() const { return SubClassData; } 1988 unsigned getTypeQuals() const { return TypeQuals; } 1989public: 1990 1991 QualType getResultType() const { return ResultType; } 1992 1993 unsigned getRegParmType() const { return RegParm; } 1994 bool getNoReturnAttr() const { return NoReturn; } 1995 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1996 ExtInfo getExtInfo() const { 1997 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1998 } 1999 2000 /// \brief Determine the type of an expression that calls a function of 2001 /// this type. 2002 QualType getCallResultType(ASTContext &Context) const { 2003 return getResultType().getNonLValueExprType(Context); 2004 } 2005 2006 static llvm::StringRef getNameForCallConv(CallingConv CC); 2007 2008 static bool classof(const Type *T) { 2009 return T->getTypeClass() == FunctionNoProto || 2010 T->getTypeClass() == FunctionProto; 2011 } 2012 static bool classof(const FunctionType *) { return true; } 2013}; 2014 2015/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2016/// no information available about its arguments. 2017class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2018 FunctionNoProtoType(QualType Result, QualType Canonical, 2019 const ExtInfo &Info) 2020 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2021 /*Dependent=*/false, Result->isVariablyModifiedType(), 2022 Info) {} 2023 friend class ASTContext; // ASTContext creates these. 2024 2025protected: 2026 virtual Linkage getLinkageImpl() const; 2027 2028public: 2029 // No additional state past what FunctionType provides. 2030 2031 bool isSugared() const { return false; } 2032 QualType desugar() const { return QualType(this, 0); } 2033 2034 void Profile(llvm::FoldingSetNodeID &ID) { 2035 Profile(ID, getResultType(), getExtInfo()); 2036 } 2037 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2038 const ExtInfo &Info) { 2039 ID.AddInteger(Info.getCC()); 2040 ID.AddInteger(Info.getRegParm()); 2041 ID.AddInteger(Info.getNoReturn()); 2042 ID.AddPointer(ResultType.getAsOpaquePtr()); 2043 } 2044 2045 static bool classof(const Type *T) { 2046 return T->getTypeClass() == FunctionNoProto; 2047 } 2048 static bool classof(const FunctionNoProtoType *) { return true; } 2049}; 2050 2051/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2052/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2053/// arguments, not as having a single void argument. Such a type can have an 2054/// exception specification, but this specification is not part of the canonical 2055/// type. 2056class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2057 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2058 bool isVariadic, unsigned typeQuals, bool hasExs, 2059 bool hasAnyExs, const QualType *ExArray, 2060 unsigned numExs, QualType Canonical, 2061 const ExtInfo &Info); 2062 2063 /// NumArgs - The number of arguments this function has, not counting '...'. 2064 unsigned NumArgs : 20; 2065 2066 /// NumExceptions - The number of types in the exception spec, if any. 2067 unsigned NumExceptions : 10; 2068 2069 /// HasExceptionSpec - Whether this function has an exception spec at all. 2070 bool HasExceptionSpec : 1; 2071 2072 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2073 bool AnyExceptionSpec : 1; 2074 2075 /// ArgInfo - There is an variable size array after the class in memory that 2076 /// holds the argument types. 2077 2078 /// Exceptions - There is another variable size array after ArgInfo that 2079 /// holds the exception types. 2080 2081 friend class ASTContext; // ASTContext creates these. 2082 2083protected: 2084 virtual Linkage getLinkageImpl() const; 2085 2086public: 2087 unsigned getNumArgs() const { return NumArgs; } 2088 QualType getArgType(unsigned i) const { 2089 assert(i < NumArgs && "Invalid argument number!"); 2090 return arg_type_begin()[i]; 2091 } 2092 2093 bool hasExceptionSpec() const { return HasExceptionSpec; } 2094 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2095 unsigned getNumExceptions() const { return NumExceptions; } 2096 QualType getExceptionType(unsigned i) const { 2097 assert(i < NumExceptions && "Invalid exception number!"); 2098 return exception_begin()[i]; 2099 } 2100 bool hasEmptyExceptionSpec() const { 2101 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2102 getNumExceptions() == 0; 2103 } 2104 2105 bool isVariadic() const { return getSubClassData(); } 2106 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2107 2108 typedef const QualType *arg_type_iterator; 2109 arg_type_iterator arg_type_begin() const { 2110 return reinterpret_cast<const QualType *>(this+1); 2111 } 2112 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2113 2114 typedef const QualType *exception_iterator; 2115 exception_iterator exception_begin() const { 2116 // exceptions begin where arguments end 2117 return arg_type_end(); 2118 } 2119 exception_iterator exception_end() const { 2120 return exception_begin() + NumExceptions; 2121 } 2122 2123 bool isSugared() const { return false; } 2124 QualType desugar() const { return QualType(this, 0); } 2125 2126 static bool classof(const Type *T) { 2127 return T->getTypeClass() == FunctionProto; 2128 } 2129 static bool classof(const FunctionProtoType *) { return true; } 2130 2131 void Profile(llvm::FoldingSetNodeID &ID); 2132 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2133 arg_type_iterator ArgTys, unsigned NumArgs, 2134 bool isVariadic, unsigned TypeQuals, 2135 bool hasExceptionSpec, bool anyExceptionSpec, 2136 unsigned NumExceptions, exception_iterator Exs, 2137 const ExtInfo &ExtInfo); 2138}; 2139 2140 2141/// \brief Represents the dependent type named by a dependently-scoped 2142/// typename using declaration, e.g. 2143/// using typename Base<T>::foo; 2144/// Template instantiation turns these into the underlying type. 2145class UnresolvedUsingType : public Type { 2146 UnresolvedUsingTypenameDecl *Decl; 2147 2148 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2149 : Type(UnresolvedUsing, QualType(), true, false), 2150 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2151 friend class ASTContext; // ASTContext creates these. 2152public: 2153 2154 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2155 2156 bool isSugared() const { return false; } 2157 QualType desugar() const { return QualType(this, 0); } 2158 2159 static bool classof(const Type *T) { 2160 return T->getTypeClass() == UnresolvedUsing; 2161 } 2162 static bool classof(const UnresolvedUsingType *) { return true; } 2163 2164 void Profile(llvm::FoldingSetNodeID &ID) { 2165 return Profile(ID, Decl); 2166 } 2167 static void Profile(llvm::FoldingSetNodeID &ID, 2168 UnresolvedUsingTypenameDecl *D) { 2169 ID.AddPointer(D); 2170 } 2171}; 2172 2173 2174class TypedefType : public Type { 2175 TypedefDecl *Decl; 2176protected: 2177 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2178 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType()), 2179 Decl(const_cast<TypedefDecl*>(D)) { 2180 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2181 } 2182 friend class ASTContext; // ASTContext creates these. 2183public: 2184 2185 TypedefDecl *getDecl() const { return Decl; } 2186 2187 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2188 /// potentially looking through *all* consecutive typedefs. This returns the 2189 /// sum of the type qualifiers, so if you have: 2190 /// typedef const int A; 2191 /// typedef volatile A B; 2192 /// looking through the typedefs for B will give you "const volatile A". 2193 QualType LookThroughTypedefs() const; 2194 2195 bool isSugared() const { return true; } 2196 QualType desugar() const; 2197 2198 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2199 static bool classof(const TypedefType *) { return true; } 2200}; 2201 2202/// TypeOfExprType (GCC extension). 2203class TypeOfExprType : public Type { 2204 Expr *TOExpr; 2205 2206protected: 2207 TypeOfExprType(Expr *E, QualType can = QualType()); 2208 friend class ASTContext; // ASTContext creates these. 2209public: 2210 Expr *getUnderlyingExpr() const { return TOExpr; } 2211 2212 /// \brief Remove a single level of sugar. 2213 QualType desugar() const; 2214 2215 /// \brief Returns whether this type directly provides sugar. 2216 bool isSugared() const { return true; } 2217 2218 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2219 static bool classof(const TypeOfExprType *) { return true; } 2220}; 2221 2222/// \brief Internal representation of canonical, dependent 2223/// typeof(expr) types. 2224/// 2225/// This class is used internally by the ASTContext to manage 2226/// canonical, dependent types, only. Clients will only see instances 2227/// of this class via TypeOfExprType nodes. 2228class DependentTypeOfExprType 2229 : public TypeOfExprType, public llvm::FoldingSetNode { 2230 ASTContext &Context; 2231 2232public: 2233 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2234 : TypeOfExprType(E), Context(Context) { } 2235 2236 bool isSugared() const { return false; } 2237 QualType desugar() const { return QualType(this, 0); } 2238 2239 void Profile(llvm::FoldingSetNodeID &ID) { 2240 Profile(ID, Context, getUnderlyingExpr()); 2241 } 2242 2243 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2244 Expr *E); 2245}; 2246 2247/// TypeOfType (GCC extension). 2248class TypeOfType : public Type { 2249 QualType TOType; 2250 TypeOfType(QualType T, QualType can) 2251 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType()), 2252 TOType(T) { 2253 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2254 } 2255 friend class ASTContext; // ASTContext creates these. 2256public: 2257 QualType getUnderlyingType() const { return TOType; } 2258 2259 /// \brief Remove a single level of sugar. 2260 QualType desugar() const { return getUnderlyingType(); } 2261 2262 /// \brief Returns whether this type directly provides sugar. 2263 bool isSugared() const { return true; } 2264 2265 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2266 static bool classof(const TypeOfType *) { return true; } 2267}; 2268 2269/// DecltypeType (C++0x) 2270class DecltypeType : public Type { 2271 Expr *E; 2272 2273 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2274 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2275 // from it. 2276 QualType UnderlyingType; 2277 2278protected: 2279 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2280 friend class ASTContext; // ASTContext creates these. 2281public: 2282 Expr *getUnderlyingExpr() const { return E; } 2283 QualType getUnderlyingType() const { return UnderlyingType; } 2284 2285 /// \brief Remove a single level of sugar. 2286 QualType desugar() const { return getUnderlyingType(); } 2287 2288 /// \brief Returns whether this type directly provides sugar. 2289 bool isSugared() const { return !isDependentType(); } 2290 2291 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2292 static bool classof(const DecltypeType *) { return true; } 2293}; 2294 2295/// \brief Internal representation of canonical, dependent 2296/// decltype(expr) types. 2297/// 2298/// This class is used internally by the ASTContext to manage 2299/// canonical, dependent types, only. Clients will only see instances 2300/// of this class via DecltypeType nodes. 2301class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2302 ASTContext &Context; 2303 2304public: 2305 DependentDecltypeType(ASTContext &Context, Expr *E); 2306 2307 bool isSugared() const { return false; } 2308 QualType desugar() const { return QualType(this, 0); } 2309 2310 void Profile(llvm::FoldingSetNodeID &ID) { 2311 Profile(ID, Context, getUnderlyingExpr()); 2312 } 2313 2314 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2315 Expr *E); 2316}; 2317 2318class TagType : public Type { 2319 /// Stores the TagDecl associated with this type. The decl may point to any 2320 /// TagDecl that declares the entity. 2321 TagDecl * decl; 2322 2323protected: 2324 TagType(TypeClass TC, const TagDecl *D, QualType can); 2325 2326 virtual Linkage getLinkageImpl() const; 2327 2328public: 2329 TagDecl *getDecl() const; 2330 2331 /// @brief Determines whether this type is in the process of being 2332 /// defined. 2333 bool isBeingDefined() const; 2334 2335 static bool classof(const Type *T) { 2336 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2337 } 2338 static bool classof(const TagType *) { return true; } 2339 static bool classof(const RecordType *) { return true; } 2340 static bool classof(const EnumType *) { return true; } 2341}; 2342 2343/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2344/// to detect TagType objects of structs/unions/classes. 2345class RecordType : public TagType { 2346protected: 2347 explicit RecordType(const RecordDecl *D) 2348 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2349 explicit RecordType(TypeClass TC, RecordDecl *D) 2350 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2351 friend class ASTContext; // ASTContext creates these. 2352public: 2353 2354 RecordDecl *getDecl() const { 2355 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2356 } 2357 2358 // FIXME: This predicate is a helper to QualType/Type. It needs to 2359 // recursively check all fields for const-ness. If any field is declared 2360 // const, it needs to return false. 2361 bool hasConstFields() const { return false; } 2362 2363 // FIXME: RecordType needs to check when it is created that all fields are in 2364 // the same address space, and return that. 2365 unsigned getAddressSpace() const { return 0; } 2366 2367 bool isSugared() const { return false; } 2368 QualType desugar() const { return QualType(this, 0); } 2369 2370 static bool classof(const TagType *T); 2371 static bool classof(const Type *T) { 2372 return isa<TagType>(T) && classof(cast<TagType>(T)); 2373 } 2374 static bool classof(const RecordType *) { return true; } 2375}; 2376 2377/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2378/// to detect TagType objects of enums. 2379class EnumType : public TagType { 2380 explicit EnumType(const EnumDecl *D) 2381 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2382 friend class ASTContext; // ASTContext creates these. 2383public: 2384 2385 EnumDecl *getDecl() const { 2386 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2387 } 2388 2389 bool isSugared() const { return false; } 2390 QualType desugar() const { return QualType(this, 0); } 2391 2392 static bool classof(const TagType *T); 2393 static bool classof(const Type *T) { 2394 return isa<TagType>(T) && classof(cast<TagType>(T)); 2395 } 2396 static bool classof(const EnumType *) { return true; } 2397}; 2398 2399class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2400 unsigned Depth : 15; 2401 unsigned Index : 16; 2402 unsigned ParameterPack : 1; 2403 IdentifierInfo *Name; 2404 2405 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2406 QualType Canon) 2407 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2408 /*VariablyModified=*/false), 2409 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2410 2411 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2412 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2413 /*VariablyModified=*/false), 2414 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2415 2416 friend class ASTContext; // ASTContext creates these 2417 2418public: 2419 unsigned getDepth() const { return Depth; } 2420 unsigned getIndex() const { return Index; } 2421 bool isParameterPack() const { return ParameterPack; } 2422 IdentifierInfo *getName() const { return Name; } 2423 2424 bool isSugared() const { return false; } 2425 QualType desugar() const { return QualType(this, 0); } 2426 2427 void Profile(llvm::FoldingSetNodeID &ID) { 2428 Profile(ID, Depth, Index, ParameterPack, Name); 2429 } 2430 2431 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2432 unsigned Index, bool ParameterPack, 2433 IdentifierInfo *Name) { 2434 ID.AddInteger(Depth); 2435 ID.AddInteger(Index); 2436 ID.AddBoolean(ParameterPack); 2437 ID.AddPointer(Name); 2438 } 2439 2440 static bool classof(const Type *T) { 2441 return T->getTypeClass() == TemplateTypeParm; 2442 } 2443 static bool classof(const TemplateTypeParmType *T) { return true; } 2444}; 2445 2446/// \brief Represents the result of substituting a type for a template 2447/// type parameter. 2448/// 2449/// Within an instantiated template, all template type parameters have 2450/// been replaced with these. They are used solely to record that a 2451/// type was originally written as a template type parameter; 2452/// therefore they are never canonical. 2453class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2454 // The original type parameter. 2455 const TemplateTypeParmType *Replaced; 2456 2457 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2458 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2459 Canon->isVariablyModifiedType()), 2460 Replaced(Param) { } 2461 2462 friend class ASTContext; 2463 2464public: 2465 IdentifierInfo *getName() const { return Replaced->getName(); } 2466 2467 /// Gets the template parameter that was substituted for. 2468 const TemplateTypeParmType *getReplacedParameter() const { 2469 return Replaced; 2470 } 2471 2472 /// Gets the type that was substituted for the template 2473 /// parameter. 2474 QualType getReplacementType() const { 2475 return getCanonicalTypeInternal(); 2476 } 2477 2478 bool isSugared() const { return true; } 2479 QualType desugar() const { return getReplacementType(); } 2480 2481 void Profile(llvm::FoldingSetNodeID &ID) { 2482 Profile(ID, getReplacedParameter(), getReplacementType()); 2483 } 2484 static void Profile(llvm::FoldingSetNodeID &ID, 2485 const TemplateTypeParmType *Replaced, 2486 QualType Replacement) { 2487 ID.AddPointer(Replaced); 2488 ID.AddPointer(Replacement.getAsOpaquePtr()); 2489 } 2490 2491 static bool classof(const Type *T) { 2492 return T->getTypeClass() == SubstTemplateTypeParm; 2493 } 2494 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2495}; 2496 2497/// \brief Represents the type of a template specialization as written 2498/// in the source code. 2499/// 2500/// Template specialization types represent the syntactic form of a 2501/// template-id that refers to a type, e.g., @c vector<int>. Some 2502/// template specialization types are syntactic sugar, whose canonical 2503/// type will point to some other type node that represents the 2504/// instantiation or class template specialization. For example, a 2505/// class template specialization type of @c vector<int> will refer to 2506/// a tag type for the instantiation 2507/// @c std::vector<int, std::allocator<int>>. 2508/// 2509/// Other template specialization types, for which the template name 2510/// is dependent, may be canonical types. These types are always 2511/// dependent. 2512class TemplateSpecializationType 2513 : public Type, public llvm::FoldingSetNode { 2514 /// \brief The name of the template being specialized. 2515 TemplateName Template; 2516 2517 /// \brief - The number of template arguments named in this class 2518 /// template specialization. 2519 unsigned NumArgs; 2520 2521 TemplateSpecializationType(TemplateName T, 2522 const TemplateArgument *Args, 2523 unsigned NumArgs, QualType Canon); 2524 2525 friend class ASTContext; // ASTContext creates these 2526 2527public: 2528 /// \brief Determine whether any of the given template arguments are 2529 /// dependent. 2530 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2531 unsigned NumArgs); 2532 2533 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2534 unsigned NumArgs); 2535 2536 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2537 2538 /// \brief Print a template argument list, including the '<' and '>' 2539 /// enclosing the template arguments. 2540 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2541 unsigned NumArgs, 2542 const PrintingPolicy &Policy); 2543 2544 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2545 unsigned NumArgs, 2546 const PrintingPolicy &Policy); 2547 2548 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2549 const PrintingPolicy &Policy); 2550 2551 /// True if this template specialization type matches a current 2552 /// instantiation in the context in which it is found. 2553 bool isCurrentInstantiation() const { 2554 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2555 } 2556 2557 typedef const TemplateArgument * iterator; 2558 2559 iterator begin() const { return getArgs(); } 2560 iterator end() const; // defined inline in TemplateBase.h 2561 2562 /// \brief Retrieve the name of the template that we are specializing. 2563 TemplateName getTemplateName() const { return Template; } 2564 2565 /// \brief Retrieve the template arguments. 2566 const TemplateArgument *getArgs() const { 2567 return reinterpret_cast<const TemplateArgument *>(this + 1); 2568 } 2569 2570 /// \brief Retrieve the number of template arguments. 2571 unsigned getNumArgs() const { return NumArgs; } 2572 2573 /// \brief Retrieve a specific template argument as a type. 2574 /// \precondition @c isArgType(Arg) 2575 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2576 2577 bool isSugared() const { 2578 return !isDependentType() || isCurrentInstantiation(); 2579 } 2580 QualType desugar() const { return getCanonicalTypeInternal(); } 2581 2582 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2583 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2584 } 2585 2586 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2587 const TemplateArgument *Args, 2588 unsigned NumArgs, 2589 ASTContext &Context); 2590 2591 static bool classof(const Type *T) { 2592 return T->getTypeClass() == TemplateSpecialization; 2593 } 2594 static bool classof(const TemplateSpecializationType *T) { return true; } 2595}; 2596 2597/// \brief The injected class name of a C++ class template or class 2598/// template partial specialization. Used to record that a type was 2599/// spelled with a bare identifier rather than as a template-id; the 2600/// equivalent for non-templated classes is just RecordType. 2601/// 2602/// Injected class name types are always dependent. Template 2603/// instantiation turns these into RecordTypes. 2604/// 2605/// Injected class name types are always canonical. This works 2606/// because it is impossible to compare an injected class name type 2607/// with the corresponding non-injected template type, for the same 2608/// reason that it is impossible to directly compare template 2609/// parameters from different dependent contexts: injected class name 2610/// types can only occur within the scope of a particular templated 2611/// declaration, and within that scope every template specialization 2612/// will canonicalize to the injected class name (when appropriate 2613/// according to the rules of the language). 2614class InjectedClassNameType : public Type { 2615 CXXRecordDecl *Decl; 2616 2617 /// The template specialization which this type represents. 2618 /// For example, in 2619 /// template <class T> class A { ... }; 2620 /// this is A<T>, whereas in 2621 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2622 /// this is A<B<X,Y> >. 2623 /// 2624 /// It is always unqualified, always a template specialization type, 2625 /// and always dependent. 2626 QualType InjectedType; 2627 2628 friend class ASTContext; // ASTContext creates these. 2629 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2630 // currently suitable for AST reading, too much 2631 // interdependencies. 2632 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2633 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2634 /*VariablyModified=*/false), 2635 Decl(D), InjectedType(TST) { 2636 assert(isa<TemplateSpecializationType>(TST)); 2637 assert(!TST.hasQualifiers()); 2638 assert(TST->isDependentType()); 2639 } 2640 2641public: 2642 QualType getInjectedSpecializationType() const { return InjectedType; } 2643 const TemplateSpecializationType *getInjectedTST() const { 2644 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2645 } 2646 2647 CXXRecordDecl *getDecl() const; 2648 2649 bool isSugared() const { return false; } 2650 QualType desugar() const { return QualType(this, 0); } 2651 2652 static bool classof(const Type *T) { 2653 return T->getTypeClass() == InjectedClassName; 2654 } 2655 static bool classof(const InjectedClassNameType *T) { return true; } 2656}; 2657 2658/// \brief The kind of a tag type. 2659enum TagTypeKind { 2660 /// \brief The "struct" keyword. 2661 TTK_Struct, 2662 /// \brief The "union" keyword. 2663 TTK_Union, 2664 /// \brief The "class" keyword. 2665 TTK_Class, 2666 /// \brief The "enum" keyword. 2667 TTK_Enum 2668}; 2669 2670/// \brief The elaboration keyword that precedes a qualified type name or 2671/// introduces an elaborated-type-specifier. 2672enum ElaboratedTypeKeyword { 2673 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2674 ETK_Struct, 2675 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2676 ETK_Union, 2677 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2678 ETK_Class, 2679 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2680 ETK_Enum, 2681 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2682 /// \c typename T::type. 2683 ETK_Typename, 2684 /// \brief No keyword precedes the qualified type name. 2685 ETK_None 2686}; 2687 2688/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2689/// The keyword in stored in the free bits of the base class. 2690/// Also provides a few static helpers for converting and printing 2691/// elaborated type keyword and tag type kind enumerations. 2692class TypeWithKeyword : public Type { 2693 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2694 unsigned Keyword : 3; 2695 2696protected: 2697 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2698 QualType Canonical, bool Dependent, bool VariablyModified) 2699 : Type(tc, Canonical, Dependent, VariablyModified), 2700 Keyword(Keyword) {} 2701 2702public: 2703 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2704 2705 ElaboratedTypeKeyword getKeyword() const { 2706 return static_cast<ElaboratedTypeKeyword>(Keyword); 2707 } 2708 2709 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2710 /// into an elaborated type keyword. 2711 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2712 2713 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2714 /// into a tag type kind. It is an error to provide a type specifier 2715 /// which *isn't* a tag kind here. 2716 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2717 2718 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2719 /// elaborated type keyword. 2720 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2721 2722 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2723 // a TagTypeKind. It is an error to provide an elaborated type keyword 2724 /// which *isn't* a tag kind here. 2725 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2726 2727 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2728 2729 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2730 2731 static const char *getTagTypeKindName(TagTypeKind Kind) { 2732 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2733 } 2734 2735 class CannotCastToThisType {}; 2736 static CannotCastToThisType classof(const Type *); 2737}; 2738 2739/// \brief Represents a type that was referred to using an elaborated type 2740/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2741/// or both. 2742/// 2743/// This type is used to keep track of a type name as written in the 2744/// source code, including tag keywords and any nested-name-specifiers. 2745/// The type itself is always "sugar", used to express what was written 2746/// in the source code but containing no additional semantic information. 2747class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2748 2749 /// \brief The nested name specifier containing the qualifier. 2750 NestedNameSpecifier *NNS; 2751 2752 /// \brief The type that this qualified name refers to. 2753 QualType NamedType; 2754 2755 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2756 QualType NamedType, QualType CanonType) 2757 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2758 NamedType->isDependentType(), 2759 NamedType->isVariablyModifiedType()), 2760 NNS(NNS), NamedType(NamedType) { 2761 assert(!(Keyword == ETK_None && NNS == 0) && 2762 "ElaboratedType cannot have elaborated type keyword " 2763 "and name qualifier both null."); 2764 } 2765 2766 friend class ASTContext; // ASTContext creates these 2767 2768public: 2769 ~ElaboratedType(); 2770 2771 /// \brief Retrieve the qualification on this type. 2772 NestedNameSpecifier *getQualifier() const { return NNS; } 2773 2774 /// \brief Retrieve the type named by the qualified-id. 2775 QualType getNamedType() const { return NamedType; } 2776 2777 /// \brief Remove a single level of sugar. 2778 QualType desugar() const { return getNamedType(); } 2779 2780 /// \brief Returns whether this type directly provides sugar. 2781 bool isSugared() const { return true; } 2782 2783 void Profile(llvm::FoldingSetNodeID &ID) { 2784 Profile(ID, getKeyword(), NNS, NamedType); 2785 } 2786 2787 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2788 NestedNameSpecifier *NNS, QualType NamedType) { 2789 ID.AddInteger(Keyword); 2790 ID.AddPointer(NNS); 2791 NamedType.Profile(ID); 2792 } 2793 2794 static bool classof(const Type *T) { 2795 return T->getTypeClass() == Elaborated; 2796 } 2797 static bool classof(const ElaboratedType *T) { return true; } 2798}; 2799 2800/// \brief Represents a qualified type name for which the type name is 2801/// dependent. 2802/// 2803/// DependentNameType represents a class of dependent types that involve a 2804/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2805/// name of a type. The DependentNameType may start with a "typename" (for a 2806/// typename-specifier), "class", "struct", "union", or "enum" (for a 2807/// dependent elaborated-type-specifier), or nothing (in contexts where we 2808/// know that we must be referring to a type, e.g., in a base class specifier). 2809class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2810 2811 /// \brief The nested name specifier containing the qualifier. 2812 NestedNameSpecifier *NNS; 2813 2814 /// \brief The type that this typename specifier refers to. 2815 const IdentifierInfo *Name; 2816 2817 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2818 const IdentifierInfo *Name, QualType CanonType) 2819 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 2820 /*VariablyModified=*/false), 2821 NNS(NNS), Name(Name) { 2822 assert(NNS->isDependent() && 2823 "DependentNameType requires a dependent nested-name-specifier"); 2824 } 2825 2826 friend class ASTContext; // ASTContext creates these 2827 2828public: 2829 virtual ~DependentNameType(); 2830 2831 /// \brief Retrieve the qualification on this type. 2832 NestedNameSpecifier *getQualifier() const { return NNS; } 2833 2834 /// \brief Retrieve the type named by the typename specifier as an 2835 /// identifier. 2836 /// 2837 /// This routine will return a non-NULL identifier pointer when the 2838 /// form of the original typename was terminated by an identifier, 2839 /// e.g., "typename T::type". 2840 const IdentifierInfo *getIdentifier() const { 2841 return Name; 2842 } 2843 2844 bool isSugared() const { return false; } 2845 QualType desugar() const { return QualType(this, 0); } 2846 2847 void Profile(llvm::FoldingSetNodeID &ID) { 2848 Profile(ID, getKeyword(), NNS, Name); 2849 } 2850 2851 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2852 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2853 ID.AddInteger(Keyword); 2854 ID.AddPointer(NNS); 2855 ID.AddPointer(Name); 2856 } 2857 2858 static bool classof(const Type *T) { 2859 return T->getTypeClass() == DependentName; 2860 } 2861 static bool classof(const DependentNameType *T) { return true; } 2862}; 2863 2864/// DependentTemplateSpecializationType - Represents a template 2865/// specialization type whose template cannot be resolved, e.g. 2866/// A<T>::template B<T> 2867class DependentTemplateSpecializationType : 2868 public TypeWithKeyword, public llvm::FoldingSetNode { 2869 2870 /// \brief The nested name specifier containing the qualifier. 2871 NestedNameSpecifier *NNS; 2872 2873 /// \brief The identifier of the template. 2874 const IdentifierInfo *Name; 2875 2876 /// \brief - The number of template arguments named in this class 2877 /// template specialization. 2878 unsigned NumArgs; 2879 2880 const TemplateArgument *getArgBuffer() const { 2881 return reinterpret_cast<const TemplateArgument*>(this+1); 2882 } 2883 TemplateArgument *getArgBuffer() { 2884 return reinterpret_cast<TemplateArgument*>(this+1); 2885 } 2886 2887 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 2888 NestedNameSpecifier *NNS, 2889 const IdentifierInfo *Name, 2890 unsigned NumArgs, 2891 const TemplateArgument *Args, 2892 QualType Canon); 2893 2894 friend class ASTContext; // ASTContext creates these 2895 2896public: 2897 virtual ~DependentTemplateSpecializationType(); 2898 2899 NestedNameSpecifier *getQualifier() const { return NNS; } 2900 const IdentifierInfo *getIdentifier() const { return Name; } 2901 2902 /// \brief Retrieve the template arguments. 2903 const TemplateArgument *getArgs() const { 2904 return getArgBuffer(); 2905 } 2906 2907 /// \brief Retrieve the number of template arguments. 2908 unsigned getNumArgs() const { return NumArgs; } 2909 2910 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2911 2912 typedef const TemplateArgument * iterator; 2913 iterator begin() const { return getArgs(); } 2914 iterator end() const; // inline in TemplateBase.h 2915 2916 bool isSugared() const { return false; } 2917 QualType desugar() const { return QualType(this, 0); } 2918 2919 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 2920 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 2921 } 2922 2923 static void Profile(llvm::FoldingSetNodeID &ID, 2924 ASTContext &Context, 2925 ElaboratedTypeKeyword Keyword, 2926 NestedNameSpecifier *Qualifier, 2927 const IdentifierInfo *Name, 2928 unsigned NumArgs, 2929 const TemplateArgument *Args); 2930 2931 static bool classof(const Type *T) { 2932 return T->getTypeClass() == DependentTemplateSpecialization; 2933 } 2934 static bool classof(const DependentTemplateSpecializationType *T) { 2935 return true; 2936 } 2937}; 2938 2939/// ObjCObjectType - Represents a class type in Objective C. 2940/// Every Objective C type is a combination of a base type and a 2941/// list of protocols. 2942/// 2943/// Given the following declarations: 2944/// @class C; 2945/// @protocol P; 2946/// 2947/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2948/// with base C and no protocols. 2949/// 2950/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2951/// 2952/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2953/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2954/// and no protocols. 2955/// 2956/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2957/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2958/// this should get its own sugar class to better represent the source. 2959class ObjCObjectType : public Type { 2960 // Pad the bit count up so that NumProtocols is 2-byte aligned 2961 unsigned : BitsRemainingInType - 16; 2962 2963 /// \brief The number of protocols stored after the 2964 /// ObjCObjectPointerType node. 2965 /// 2966 /// These protocols are those written directly on the type. If 2967 /// protocol qualifiers ever become additive, the iterators will 2968 /// get kindof complicated. 2969 /// 2970 /// In the canonical object type, these are sorted alphabetically 2971 /// and uniqued. 2972 unsigned NumProtocols : 16; 2973 2974 /// Either a BuiltinType or an InterfaceType or sugar for either. 2975 QualType BaseType; 2976 2977 ObjCProtocolDecl * const *getProtocolStorage() const { 2978 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2979 } 2980 2981 ObjCProtocolDecl **getProtocolStorage(); 2982 2983protected: 2984 ObjCObjectType(QualType Canonical, QualType Base, 2985 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2986 2987 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2988 ObjCObjectType(enum Nonce_ObjCInterface) 2989 : Type(ObjCInterface, QualType(), false, false), 2990 NumProtocols(0), 2991 BaseType(QualType(this_(), 0)) {} 2992 2993protected: 2994 Linkage getLinkageImpl() const; // key function 2995 2996public: 2997 /// getBaseType - Gets the base type of this object type. This is 2998 /// always (possibly sugar for) one of: 2999 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3000 /// user, which is a typedef for an ObjCPointerType) 3001 /// - the 'Class' builtin type (same caveat) 3002 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3003 QualType getBaseType() const { return BaseType; } 3004 3005 bool isObjCId() const { 3006 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3007 } 3008 bool isObjCClass() const { 3009 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3010 } 3011 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3012 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3013 bool isObjCUnqualifiedIdOrClass() const { 3014 if (!qual_empty()) return false; 3015 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3016 return T->getKind() == BuiltinType::ObjCId || 3017 T->getKind() == BuiltinType::ObjCClass; 3018 return false; 3019 } 3020 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3021 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3022 3023 /// Gets the interface declaration for this object type, if the base type 3024 /// really is an interface. 3025 ObjCInterfaceDecl *getInterface() const; 3026 3027 typedef ObjCProtocolDecl * const *qual_iterator; 3028 3029 qual_iterator qual_begin() const { return getProtocolStorage(); } 3030 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3031 3032 bool qual_empty() const { return getNumProtocols() == 0; } 3033 3034 /// getNumProtocols - Return the number of qualifying protocols in this 3035 /// interface type, or 0 if there are none. 3036 unsigned getNumProtocols() const { return NumProtocols; } 3037 3038 /// \brief Fetch a protocol by index. 3039 ObjCProtocolDecl *getProtocol(unsigned I) const { 3040 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3041 return qual_begin()[I]; 3042 } 3043 3044 bool isSugared() const { return false; } 3045 QualType desugar() const { return QualType(this, 0); } 3046 3047 static bool classof(const Type *T) { 3048 return T->getTypeClass() == ObjCObject || 3049 T->getTypeClass() == ObjCInterface; 3050 } 3051 static bool classof(const ObjCObjectType *) { return true; } 3052}; 3053 3054/// ObjCObjectTypeImpl - A class providing a concrete implementation 3055/// of ObjCObjectType, so as to not increase the footprint of 3056/// ObjCInterfaceType. Code outside of ASTContext and the core type 3057/// system should not reference this type. 3058class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3059 friend class ASTContext; 3060 3061 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3062 // will need to be modified. 3063 3064 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3065 ObjCProtocolDecl * const *Protocols, 3066 unsigned NumProtocols) 3067 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3068 3069public: 3070 void Profile(llvm::FoldingSetNodeID &ID); 3071 static void Profile(llvm::FoldingSetNodeID &ID, 3072 QualType Base, 3073 ObjCProtocolDecl *const *protocols, 3074 unsigned NumProtocols); 3075}; 3076 3077inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3078 return reinterpret_cast<ObjCProtocolDecl**>( 3079 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3080} 3081 3082/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3083/// object oriented design. They basically correspond to C++ classes. There 3084/// are two kinds of interface types, normal interfaces like "NSString" and 3085/// qualified interfaces, which are qualified with a protocol list like 3086/// "NSString<NSCopyable, NSAmazing>". 3087/// 3088/// ObjCInterfaceType guarantees the following properties when considered 3089/// as a subtype of its superclass, ObjCObjectType: 3090/// - There are no protocol qualifiers. To reinforce this, code which 3091/// tries to invoke the protocol methods via an ObjCInterfaceType will 3092/// fail to compile. 3093/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3094/// T->getBaseType() == QualType(T, 0). 3095class ObjCInterfaceType : public ObjCObjectType { 3096 ObjCInterfaceDecl *Decl; 3097 3098 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3099 : ObjCObjectType(Nonce_ObjCInterface), 3100 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3101 friend class ASTContext; // ASTContext creates these. 3102public: 3103 /// getDecl - Get the declaration of this interface. 3104 ObjCInterfaceDecl *getDecl() const { return Decl; } 3105 3106 bool isSugared() const { return false; } 3107 QualType desugar() const { return QualType(this, 0); } 3108 3109 static bool classof(const Type *T) { 3110 return T->getTypeClass() == ObjCInterface; 3111 } 3112 static bool classof(const ObjCInterfaceType *) { return true; } 3113 3114 // Nonsense to "hide" certain members of ObjCObjectType within this 3115 // class. People asking for protocols on an ObjCInterfaceType are 3116 // not going to get what they want: ObjCInterfaceTypes are 3117 // guaranteed to have no protocols. 3118 enum { 3119 qual_iterator, 3120 qual_begin, 3121 qual_end, 3122 getNumProtocols, 3123 getProtocol 3124 }; 3125}; 3126 3127inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3128 if (const ObjCInterfaceType *T = 3129 getBaseType()->getAs<ObjCInterfaceType>()) 3130 return T->getDecl(); 3131 return 0; 3132} 3133 3134/// ObjCObjectPointerType - Used to represent a pointer to an 3135/// Objective C object. These are constructed from pointer 3136/// declarators when the pointee type is an ObjCObjectType (or sugar 3137/// for one). In addition, the 'id' and 'Class' types are typedefs 3138/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3139/// are translated into these. 3140/// 3141/// Pointers to pointers to Objective C objects are still PointerTypes; 3142/// only the first level of pointer gets it own type implementation. 3143class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3144 QualType PointeeType; 3145 3146 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3147 : Type(ObjCObjectPointer, Canonical, false, false), 3148 PointeeType(Pointee) {} 3149 friend class ASTContext; // ASTContext creates these. 3150 3151protected: 3152 virtual Linkage getLinkageImpl() const; 3153 3154public: 3155 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3156 /// The result will always be an ObjCObjectType or sugar thereof. 3157 QualType getPointeeType() const { return PointeeType; } 3158 3159 /// getObjCObjectType - Gets the type pointed to by this ObjC 3160 /// pointer. This method always returns non-null. 3161 /// 3162 /// This method is equivalent to getPointeeType() except that 3163 /// it discards any typedefs (or other sugar) between this 3164 /// type and the "outermost" object type. So for: 3165 /// @class A; @protocol P; @protocol Q; 3166 /// typedef A<P> AP; 3167 /// typedef A A1; 3168 /// typedef A1<P> A1P; 3169 /// typedef A1P<Q> A1PQ; 3170 /// For 'A*', getObjectType() will return 'A'. 3171 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3172 /// For 'AP*', getObjectType() will return 'A<P>'. 3173 /// For 'A1*', getObjectType() will return 'A'. 3174 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3175 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3176 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3177 /// adding protocols to a protocol-qualified base discards the 3178 /// old qualifiers (for now). But if it didn't, getObjectType() 3179 /// would return 'A1P<Q>' (and we'd have to make iterating over 3180 /// qualifiers more complicated). 3181 const ObjCObjectType *getObjectType() const { 3182 return PointeeType->getAs<ObjCObjectType>(); 3183 } 3184 3185 /// getInterfaceType - If this pointer points to an Objective C 3186 /// @interface type, gets the type for that interface. Any protocol 3187 /// qualifiers on the interface are ignored. 3188 /// 3189 /// \return null if the base type for this pointer is 'id' or 'Class' 3190 const ObjCInterfaceType *getInterfaceType() const { 3191 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3192 } 3193 3194 /// getInterfaceDecl - If this pointer points to an Objective @interface 3195 /// type, gets the declaration for that interface. 3196 /// 3197 /// \return null if the base type for this pointer is 'id' or 'Class' 3198 ObjCInterfaceDecl *getInterfaceDecl() const { 3199 return getObjectType()->getInterface(); 3200 } 3201 3202 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3203 /// its object type is the primitive 'id' type with no protocols. 3204 bool isObjCIdType() const { 3205 return getObjectType()->isObjCUnqualifiedId(); 3206 } 3207 3208 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3209 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3210 bool isObjCClassType() const { 3211 return getObjectType()->isObjCUnqualifiedClass(); 3212 } 3213 3214 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3215 /// non-empty set of protocols. 3216 bool isObjCQualifiedIdType() const { 3217 return getObjectType()->isObjCQualifiedId(); 3218 } 3219 3220 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3221 /// some non-empty set of protocols. 3222 bool isObjCQualifiedClassType() const { 3223 return getObjectType()->isObjCQualifiedClass(); 3224 } 3225 3226 /// An iterator over the qualifiers on the object type. Provided 3227 /// for convenience. This will always iterate over the full set of 3228 /// protocols on a type, not just those provided directly. 3229 typedef ObjCObjectType::qual_iterator qual_iterator; 3230 3231 qual_iterator qual_begin() const { 3232 return getObjectType()->qual_begin(); 3233 } 3234 qual_iterator qual_end() const { 3235 return getObjectType()->qual_end(); 3236 } 3237 bool qual_empty() const { return getObjectType()->qual_empty(); } 3238 3239 /// getNumProtocols - Return the number of qualifying protocols on 3240 /// the object type. 3241 unsigned getNumProtocols() const { 3242 return getObjectType()->getNumProtocols(); 3243 } 3244 3245 /// \brief Retrieve a qualifying protocol by index on the object 3246 /// type. 3247 ObjCProtocolDecl *getProtocol(unsigned I) const { 3248 return getObjectType()->getProtocol(I); 3249 } 3250 3251 bool isSugared() const { return false; } 3252 QualType desugar() const { return QualType(this, 0); } 3253 3254 void Profile(llvm::FoldingSetNodeID &ID) { 3255 Profile(ID, getPointeeType()); 3256 } 3257 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3258 ID.AddPointer(T.getAsOpaquePtr()); 3259 } 3260 static bool classof(const Type *T) { 3261 return T->getTypeClass() == ObjCObjectPointer; 3262 } 3263 static bool classof(const ObjCObjectPointerType *) { return true; } 3264}; 3265 3266/// A qualifier set is used to build a set of qualifiers. 3267class QualifierCollector : public Qualifiers { 3268 ASTContext *Context; 3269 3270public: 3271 QualifierCollector(Qualifiers Qs = Qualifiers()) 3272 : Qualifiers(Qs), Context(0) {} 3273 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3274 : Qualifiers(Qs), Context(&Context) {} 3275 3276 void setContext(ASTContext &C) { Context = &C; } 3277 3278 /// Collect any qualifiers on the given type and return an 3279 /// unqualified type. 3280 const Type *strip(QualType QT) { 3281 addFastQualifiers(QT.getLocalFastQualifiers()); 3282 if (QT.hasLocalNonFastQualifiers()) { 3283 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3284 Context = &EQ->getContext(); 3285 addQualifiers(EQ->getQualifiers()); 3286 return EQ->getBaseType(); 3287 } 3288 return QT.getTypePtrUnsafe(); 3289 } 3290 3291 /// Apply the collected qualifiers to the given type. 3292 QualType apply(QualType QT) const; 3293 3294 /// Apply the collected qualifiers to the given type. 3295 QualType apply(const Type* T) const; 3296 3297}; 3298 3299 3300// Inline function definitions. 3301 3302inline bool QualType::isCanonical() const { 3303 const Type *T = getTypePtr(); 3304 if (hasLocalQualifiers()) 3305 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3306 return T->isCanonicalUnqualified(); 3307} 3308 3309inline bool QualType::isCanonicalAsParam() const { 3310 if (hasLocalQualifiers()) return false; 3311 3312 const Type *T = getTypePtr(); 3313 if ((*this)->isPointerType()) { 3314 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3315 if (isa<VariableArrayType>(BaseType)) { 3316 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3317 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3318 if (VAT->getSizeExpr()) 3319 T = BaseType.getTypePtr(); 3320 } 3321 } 3322 return T->isCanonicalUnqualified() && 3323 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3324} 3325 3326inline bool QualType::isConstQualified() const { 3327 return isLocalConstQualified() || 3328 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3329} 3330 3331inline bool QualType::isRestrictQualified() const { 3332 return isLocalRestrictQualified() || 3333 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3334} 3335 3336 3337inline bool QualType::isVolatileQualified() const { 3338 return isLocalVolatileQualified() || 3339 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3340} 3341 3342inline bool QualType::hasQualifiers() const { 3343 return hasLocalQualifiers() || 3344 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3345} 3346 3347inline Qualifiers QualType::getQualifiers() const { 3348 Qualifiers Quals = getLocalQualifiers(); 3349 Quals.addQualifiers( 3350 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3351 return Quals; 3352} 3353 3354inline unsigned QualType::getCVRQualifiers() const { 3355 return getLocalCVRQualifiers() | 3356 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3357} 3358 3359/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3360/// type, returns them. Otherwise, if this is an array type, recurses 3361/// on the element type until some qualifiers have been found or a non-array 3362/// type reached. 3363inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3364 if (unsigned Quals = getCVRQualifiers()) 3365 return Quals; 3366 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3367 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3368 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3369 return 0; 3370} 3371 3372inline void QualType::removeConst() { 3373 removeFastQualifiers(Qualifiers::Const); 3374} 3375 3376inline void QualType::removeRestrict() { 3377 removeFastQualifiers(Qualifiers::Restrict); 3378} 3379 3380inline void QualType::removeVolatile() { 3381 QualifierCollector Qc; 3382 const Type *Ty = Qc.strip(*this); 3383 if (Qc.hasVolatile()) { 3384 Qc.removeVolatile(); 3385 *this = Qc.apply(Ty); 3386 } 3387} 3388 3389inline void QualType::removeCVRQualifiers(unsigned Mask) { 3390 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3391 3392 // Fast path: we don't need to touch the slow qualifiers. 3393 if (!(Mask & ~Qualifiers::FastMask)) { 3394 removeFastQualifiers(Mask); 3395 return; 3396 } 3397 3398 QualifierCollector Qc; 3399 const Type *Ty = Qc.strip(*this); 3400 Qc.removeCVRQualifiers(Mask); 3401 *this = Qc.apply(Ty); 3402} 3403 3404/// getAddressSpace - Return the address space of this type. 3405inline unsigned QualType::getAddressSpace() const { 3406 if (hasLocalNonFastQualifiers()) { 3407 const ExtQuals *EQ = getExtQualsUnsafe(); 3408 if (EQ->hasAddressSpace()) 3409 return EQ->getAddressSpace(); 3410 } 3411 3412 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3413 if (CT.hasLocalNonFastQualifiers()) { 3414 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3415 if (EQ->hasAddressSpace()) 3416 return EQ->getAddressSpace(); 3417 } 3418 3419 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3420 return AT->getElementType().getAddressSpace(); 3421 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3422 return RT->getAddressSpace(); 3423 return 0; 3424} 3425 3426/// getObjCGCAttr - Return the gc attribute of this type. 3427inline Qualifiers::GC QualType::getObjCGCAttr() const { 3428 if (hasLocalNonFastQualifiers()) { 3429 const ExtQuals *EQ = getExtQualsUnsafe(); 3430 if (EQ->hasObjCGCAttr()) 3431 return EQ->getObjCGCAttr(); 3432 } 3433 3434 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3435 if (CT.hasLocalNonFastQualifiers()) { 3436 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3437 if (EQ->hasObjCGCAttr()) 3438 return EQ->getObjCGCAttr(); 3439 } 3440 3441 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3442 return AT->getElementType().getObjCGCAttr(); 3443 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3444 return PT->getPointeeType().getObjCGCAttr(); 3445 // We most look at all pointer types, not just pointer to interface types. 3446 if (const PointerType *PT = CT->getAs<PointerType>()) 3447 return PT->getPointeeType().getObjCGCAttr(); 3448 return Qualifiers::GCNone; 3449} 3450 3451inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3452 if (const PointerType *PT = t.getAs<PointerType>()) { 3453 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3454 return FT->getExtInfo(); 3455 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3456 return FT->getExtInfo(); 3457 3458 return FunctionType::ExtInfo(); 3459} 3460 3461inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3462 return getFunctionExtInfo(*t); 3463} 3464 3465/// \brief Determine whether this set of qualifiers is a superset of the given 3466/// set of qualifiers. 3467inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3468 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3469} 3470 3471/// isMoreQualifiedThan - Determine whether this type is more 3472/// qualified than the Other type. For example, "const volatile int" 3473/// is more qualified than "const int", "volatile int", and 3474/// "int". However, it is not more qualified than "const volatile 3475/// int". 3476inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3477 // FIXME: work on arbitrary qualifiers 3478 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3479 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3480 if (getAddressSpace() != Other.getAddressSpace()) 3481 return false; 3482 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3483} 3484 3485/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3486/// as qualified as the Other type. For example, "const volatile 3487/// int" is at least as qualified as "const int", "volatile int", 3488/// "int", and "const volatile int". 3489inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3490 // FIXME: work on arbitrary qualifiers 3491 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3492 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3493 if (getAddressSpace() != Other.getAddressSpace()) 3494 return false; 3495 return (MyQuals | OtherQuals) == MyQuals; 3496} 3497 3498/// getNonReferenceType - If Type is a reference type (e.g., const 3499/// int&), returns the type that the reference refers to ("const 3500/// int"). Otherwise, returns the type itself. This routine is used 3501/// throughout Sema to implement C++ 5p6: 3502/// 3503/// If an expression initially has the type "reference to T" (8.3.2, 3504/// 8.5.3), the type is adjusted to "T" prior to any further 3505/// analysis, the expression designates the object or function 3506/// denoted by the reference, and the expression is an lvalue. 3507inline QualType QualType::getNonReferenceType() const { 3508 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3509 return RefType->getPointeeType(); 3510 else 3511 return *this; 3512} 3513 3514inline bool Type::isFunctionType() const { 3515 return isa<FunctionType>(CanonicalType); 3516} 3517inline bool Type::isPointerType() const { 3518 return isa<PointerType>(CanonicalType); 3519} 3520inline bool Type::isAnyPointerType() const { 3521 return isPointerType() || isObjCObjectPointerType(); 3522} 3523inline bool Type::isBlockPointerType() const { 3524 return isa<BlockPointerType>(CanonicalType); 3525} 3526inline bool Type::isReferenceType() const { 3527 return isa<ReferenceType>(CanonicalType); 3528} 3529inline bool Type::isLValueReferenceType() const { 3530 return isa<LValueReferenceType>(CanonicalType); 3531} 3532inline bool Type::isRValueReferenceType() const { 3533 return isa<RValueReferenceType>(CanonicalType); 3534} 3535inline bool Type::isFunctionPointerType() const { 3536 if (const PointerType* T = getAs<PointerType>()) 3537 return T->getPointeeType()->isFunctionType(); 3538 else 3539 return false; 3540} 3541inline bool Type::isMemberPointerType() const { 3542 return isa<MemberPointerType>(CanonicalType); 3543} 3544inline bool Type::isMemberFunctionPointerType() const { 3545 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3546 return T->isMemberFunctionPointer(); 3547 else 3548 return false; 3549} 3550inline bool Type::isMemberDataPointerType() const { 3551 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3552 return T->isMemberDataPointer(); 3553 else 3554 return false; 3555} 3556inline bool Type::isArrayType() const { 3557 return isa<ArrayType>(CanonicalType); 3558} 3559inline bool Type::isConstantArrayType() const { 3560 return isa<ConstantArrayType>(CanonicalType); 3561} 3562inline bool Type::isIncompleteArrayType() const { 3563 return isa<IncompleteArrayType>(CanonicalType); 3564} 3565inline bool Type::isVariableArrayType() const { 3566 return isa<VariableArrayType>(CanonicalType); 3567} 3568inline bool Type::isDependentSizedArrayType() const { 3569 return isa<DependentSizedArrayType>(CanonicalType); 3570} 3571inline bool Type::isBuiltinType() const { 3572 return isa<BuiltinType>(CanonicalType); 3573} 3574inline bool Type::isRecordType() const { 3575 return isa<RecordType>(CanonicalType); 3576} 3577inline bool Type::isEnumeralType() const { 3578 return isa<EnumType>(CanonicalType); 3579} 3580inline bool Type::isAnyComplexType() const { 3581 return isa<ComplexType>(CanonicalType); 3582} 3583inline bool Type::isVectorType() const { 3584 return isa<VectorType>(CanonicalType); 3585} 3586inline bool Type::isExtVectorType() const { 3587 return isa<ExtVectorType>(CanonicalType); 3588} 3589inline bool Type::isObjCObjectPointerType() const { 3590 return isa<ObjCObjectPointerType>(CanonicalType); 3591} 3592inline bool Type::isObjCObjectType() const { 3593 return isa<ObjCObjectType>(CanonicalType); 3594} 3595inline bool Type::isObjCObjectOrInterfaceType() const { 3596 return isa<ObjCInterfaceType>(CanonicalType) || 3597 isa<ObjCObjectType>(CanonicalType); 3598} 3599 3600inline bool Type::isObjCQualifiedIdType() const { 3601 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3602 return OPT->isObjCQualifiedIdType(); 3603 return false; 3604} 3605inline bool Type::isObjCQualifiedClassType() const { 3606 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3607 return OPT->isObjCQualifiedClassType(); 3608 return false; 3609} 3610inline bool Type::isObjCIdType() const { 3611 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3612 return OPT->isObjCIdType(); 3613 return false; 3614} 3615inline bool Type::isObjCClassType() const { 3616 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3617 return OPT->isObjCClassType(); 3618 return false; 3619} 3620inline bool Type::isObjCSelType() const { 3621 if (const PointerType *OPT = getAs<PointerType>()) 3622 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3623 return false; 3624} 3625inline bool Type::isObjCBuiltinType() const { 3626 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3627} 3628inline bool Type::isTemplateTypeParmType() const { 3629 return isa<TemplateTypeParmType>(CanonicalType); 3630} 3631 3632inline bool Type::isSpecificBuiltinType(unsigned K) const { 3633 if (const BuiltinType *BT = getAs<BuiltinType>()) 3634 if (BT->getKind() == (BuiltinType::Kind) K) 3635 return true; 3636 return false; 3637} 3638 3639inline bool Type::isPlaceholderType() const { 3640 if (const BuiltinType *BT = getAs<BuiltinType>()) 3641 return BT->isPlaceholderType(); 3642 return false; 3643} 3644 3645/// \brief Determines whether this is a type for which one can define 3646/// an overloaded operator. 3647inline bool Type::isOverloadableType() const { 3648 return isDependentType() || isRecordType() || isEnumeralType(); 3649} 3650 3651inline bool Type::hasPointerRepresentation() const { 3652 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3653 isObjCObjectPointerType() || isNullPtrType()); 3654} 3655 3656inline bool Type::hasObjCPointerRepresentation() const { 3657 return isObjCObjectPointerType(); 3658} 3659 3660/// Insertion operator for diagnostics. This allows sending QualType's into a 3661/// diagnostic with <<. 3662inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3663 QualType T) { 3664 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3665 Diagnostic::ak_qualtype); 3666 return DB; 3667} 3668 3669/// Insertion operator for partial diagnostics. This allows sending QualType's 3670/// into a diagnostic with <<. 3671inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3672 QualType T) { 3673 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3674 Diagnostic::ak_qualtype); 3675 return PD; 3676} 3677 3678// Helper class template that is used by Type::getAs to ensure that one does 3679// not try to look through a qualified type to get to an array type. 3680template<typename T, 3681 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3682 llvm::is_base_of<ArrayType, T>::value)> 3683struct ArrayType_cannot_be_used_with_getAs { }; 3684 3685template<typename T> 3686struct ArrayType_cannot_be_used_with_getAs<T, true>; 3687 3688/// Member-template getAs<specific type>'. 3689template <typename T> const T *Type::getAs() const { 3690 ArrayType_cannot_be_used_with_getAs<T> at; 3691 (void)at; 3692 3693 // If this is directly a T type, return it. 3694 if (const T *Ty = dyn_cast<T>(this)) 3695 return Ty; 3696 3697 // If the canonical form of this type isn't the right kind, reject it. 3698 if (!isa<T>(CanonicalType)) 3699 return 0; 3700 3701 // If this is a typedef for the type, strip the typedef off without 3702 // losing all typedef information. 3703 return cast<T>(getUnqualifiedDesugaredType()); 3704} 3705 3706} // end namespace clang 3707 3708#endif 3709