Type.h revision 13e47eecb1470d59e399952280e68c16e302c75d
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 the linkage of this type is already known. 797 mutable bool LinkageKnown : 1; 798 799 /// \brief Linkage of this type. 800 mutable unsigned CachedLinkage : 2; 801 802 /// \brief FromAST - Whether this type comes from an AST file. 803 mutable bool FromAST : 1; 804 805 /// \brief Set whether this type comes from an AST file. 806 void setFromAST(bool V = true) const { 807 FromAST = V; 808 } 809 810protected: 811 /// \brief Compute the linkage of this type. 812 virtual Linkage getLinkageImpl() const; 813 814 enum { BitsRemainingInType = 19 }; 815 816 // silence VC++ warning C4355: 'this' : used in base member initializer list 817 Type *this_() { return this; } 818 Type(TypeClass tc, QualType Canonical, bool dependent) 819 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 820 TC(tc), Dependent(dependent), LinkageKnown(false), 821 CachedLinkage(NoLinkage), FromAST(false) {} 822 virtual ~Type(); 823 friend class ASTContext; 824 825public: 826 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 827 828 /// \brief Whether this type comes from an AST file. 829 bool isFromAST() const { return FromAST; } 830 831 bool isCanonicalUnqualified() const { 832 return CanonicalType.getTypePtr() == this; 833 } 834 835 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 836 /// object types, function types, and incomplete types. 837 838 /// isIncompleteType - Return true if this is an incomplete type. 839 /// A type that can describe objects, but which lacks information needed to 840 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 841 /// routine will need to determine if the size is actually required. 842 bool isIncompleteType() const; 843 844 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 845 /// type, in other words, not a function type. 846 bool isIncompleteOrObjectType() const { 847 return !isFunctionType(); 848 } 849 850 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 851 bool isPODType() const; 852 853 /// isLiteralType - Return true if this is a literal type 854 /// (C++0x [basic.types]p10) 855 bool isLiteralType() const; 856 857 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 858 /// types that have a non-constant expression. This does not include "[]". 859 bool isVariablyModifiedType() const; 860 861 /// Helper methods to distinguish type categories. All type predicates 862 /// operate on the canonical type, ignoring typedefs and qualifiers. 863 864 /// isBuiltinType - returns true if the type is a builtin type. 865 bool isBuiltinType() const; 866 867 /// isSpecificBuiltinType - Test for a particular builtin type. 868 bool isSpecificBuiltinType(unsigned K) const; 869 870 /// isPlaceholderType - Test for a type which does not represent an 871 /// actual type-system type but is instead used as a placeholder for 872 /// various convenient purposes within Clang. All such types are 873 /// BuiltinTypes. 874 bool isPlaceholderType() const; 875 876 /// isIntegerType() does *not* include complex integers (a GCC extension). 877 /// isComplexIntegerType() can be used to test for complex integers. 878 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 879 bool isEnumeralType() const; 880 bool isBooleanType() const; 881 bool isCharType() const; 882 bool isWideCharType() const; 883 bool isAnyCharacterType() const; 884 bool isIntegralType(ASTContext &Ctx) const; 885 886 /// \brief Determine whether this type is an integral or enumeration type. 887 bool isIntegralOrEnumerationType() const; 888 /// \brief Determine whether this type is an integral or unscoped enumeration 889 /// type. 890 bool isIntegralOrUnscopedEnumerationType() const; 891 892 /// Floating point categories. 893 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 894 /// isComplexType() does *not* include complex integers (a GCC extension). 895 /// isComplexIntegerType() can be used to test for complex integers. 896 bool isComplexType() const; // C99 6.2.5p11 (complex) 897 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 898 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 899 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 900 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 901 bool isVoidType() const; // C99 6.2.5p19 902 bool isDerivedType() const; // C99 6.2.5p20 903 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 904 bool isAggregateType() const; 905 906 // Type Predicates: Check to see if this type is structurally the specified 907 // type, ignoring typedefs and qualifiers. 908 bool isFunctionType() const; 909 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 910 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 911 bool isPointerType() const; 912 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 913 bool isBlockPointerType() const; 914 bool isVoidPointerType() const; 915 bool isReferenceType() const; 916 bool isLValueReferenceType() const; 917 bool isRValueReferenceType() const; 918 bool isFunctionPointerType() const; 919 bool isMemberPointerType() const; 920 bool isMemberFunctionPointerType() const; 921 bool isMemberDataPointerType() const; 922 bool isArrayType() const; 923 bool isConstantArrayType() const; 924 bool isIncompleteArrayType() const; 925 bool isVariableArrayType() const; 926 bool isDependentSizedArrayType() const; 927 bool isRecordType() const; 928 bool isClassType() const; 929 bool isStructureType() const; 930 bool isStructureOrClassType() const; 931 bool isUnionType() const; 932 bool isComplexIntegerType() const; // GCC _Complex integer type. 933 bool isVectorType() const; // GCC vector type. 934 bool isExtVectorType() const; // Extended vector type. 935 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 936 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 937 // for the common case. 938 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 939 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 940 bool isObjCQualifiedIdType() const; // id<foo> 941 bool isObjCQualifiedClassType() const; // Class<foo> 942 bool isObjCObjectOrInterfaceType() const; 943 bool isObjCIdType() const; // id 944 bool isObjCClassType() const; // Class 945 bool isObjCSelType() const; // Class 946 bool isObjCBuiltinType() const; // 'id' or 'Class' 947 bool isTemplateTypeParmType() const; // C++ template type parameter 948 bool isNullPtrType() const; // C++0x nullptr_t 949 950 /// isDependentType - Whether this type is a dependent type, meaning 951 /// that its definition somehow depends on a template parameter 952 /// (C++ [temp.dep.type]). 953 bool isDependentType() const { return Dependent; } 954 bool isOverloadableType() const; 955 956 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 957 bool isElaboratedTypeSpecifier() const; 958 959 /// hasPointerRepresentation - Whether this type is represented 960 /// natively as a pointer; this includes pointers, references, block 961 /// pointers, and Objective-C interface, qualified id, and qualified 962 /// interface types, as well as nullptr_t. 963 bool hasPointerRepresentation() const; 964 965 /// hasObjCPointerRepresentation - Whether this type can represent 966 /// an objective pointer type for the purpose of GC'ability 967 bool hasObjCPointerRepresentation() const; 968 969 /// \brief Determine whether this type has an integer representation 970 /// of some sort, e.g., it is an integer type or a vector. 971 bool hasIntegerRepresentation() const; 972 973 /// \brief Determine whether this type has an signed integer representation 974 /// of some sort, e.g., it is an signed integer type or a vector. 975 bool hasSignedIntegerRepresentation() const; 976 977 /// \brief Determine whether this type has an unsigned integer representation 978 /// of some sort, e.g., it is an unsigned integer type or a vector. 979 bool hasUnsignedIntegerRepresentation() const; 980 981 /// \brief Determine whether this type has a floating-point representation 982 /// of some sort, e.g., it is a floating-point type or a vector thereof. 983 bool hasFloatingRepresentation() const; 984 985 // Type Checking Functions: Check to see if this type is structurally the 986 // specified type, ignoring typedefs and qualifiers, and return a pointer to 987 // the best type we can. 988 const RecordType *getAsStructureType() const; 989 /// NOTE: getAs*ArrayType are methods on ASTContext. 990 const RecordType *getAsUnionType() const; 991 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 992 // The following is a convenience method that returns an ObjCObjectPointerType 993 // for object declared using an interface. 994 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 995 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 996 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 997 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 998 999 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1000 /// because the type is a RecordType or because it is the injected-class-name 1001 /// type of a class template or class template partial specialization. 1002 CXXRecordDecl *getAsCXXRecordDecl() const; 1003 1004 // Member-template getAs<specific type>'. Look through sugar for 1005 // an instance of <specific type>. This scheme will eventually 1006 // replace the specific getAsXXXX methods above. 1007 // 1008 // There are some specializations of this member template listed 1009 // immediately following this class. 1010 template <typename T> const T *getAs() const; 1011 1012 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1013 /// element type of the array, potentially with type qualifiers missing. 1014 /// This method should never be used when type qualifiers are meaningful. 1015 const Type *getArrayElementTypeNoTypeQual() const; 1016 1017 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1018 /// pointer, this returns the respective pointee. 1019 QualType getPointeeType() const; 1020 1021 /// getUnqualifiedDesugaredType() - Return the specified type with 1022 /// any "sugar" removed from the type, removing any typedefs, 1023 /// typeofs, etc., as well as any qualifiers. 1024 const Type *getUnqualifiedDesugaredType() const; 1025 1026 /// More type predicates useful for type checking/promotion 1027 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1028 1029 /// isSignedIntegerType - Return true if this is an integer type that is 1030 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1031 /// an enum decl which has a signed representation, or a vector of signed 1032 /// integer element type. 1033 bool isSignedIntegerType() const; 1034 1035 /// isUnsignedIntegerType - Return true if this is an integer type that is 1036 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1037 /// decl which has an unsigned representation, or a vector of unsigned integer 1038 /// element type. 1039 bool isUnsignedIntegerType() const; 1040 1041 /// isConstantSizeType - Return true if this is not a variable sized type, 1042 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1043 /// incomplete types. 1044 bool isConstantSizeType() const; 1045 1046 /// isSpecifierType - Returns true if this type can be represented by some 1047 /// set of type specifiers. 1048 bool isSpecifierType() const; 1049 1050 /// \brief Determine the linkage of this type. 1051 Linkage getLinkage() const; 1052 1053 /// \brief Note that the linkage is no longer known. 1054 void ClearLinkageCache(); 1055 1056 const char *getTypeClassName() const; 1057 1058 QualType getCanonicalTypeInternal() const { 1059 return CanonicalType; 1060 } 1061 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1062 void dump() const; 1063 static bool classof(const Type *) { return true; } 1064 1065 friend class ASTReader; 1066 friend class ASTWriter; 1067}; 1068 1069template <> inline const TypedefType *Type::getAs() const { 1070 return dyn_cast<TypedefType>(this); 1071} 1072 1073// We can do canonical leaf types faster, because we don't have to 1074// worry about preserving child type decoration. 1075#define TYPE(Class, Base) 1076#define LEAF_TYPE(Class) \ 1077template <> inline const Class##Type *Type::getAs() const { \ 1078 return dyn_cast<Class##Type>(CanonicalType); \ 1079} 1080#include "clang/AST/TypeNodes.def" 1081 1082 1083/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1084/// types are always canonical and have a literal name field. 1085class BuiltinType : public Type { 1086public: 1087 enum Kind { 1088 Void, 1089 1090 Bool, // This is bool and/or _Bool. 1091 Char_U, // This is 'char' for targets where char is unsigned. 1092 UChar, // This is explicitly qualified unsigned char. 1093 Char16, // This is 'char16_t' for C++. 1094 Char32, // This is 'char32_t' for C++. 1095 UShort, 1096 UInt, 1097 ULong, 1098 ULongLong, 1099 UInt128, // __uint128_t 1100 1101 Char_S, // This is 'char' for targets where char is signed. 1102 SChar, // This is explicitly qualified signed char. 1103 WChar, // This is 'wchar_t' for C++. 1104 Short, 1105 Int, 1106 Long, 1107 LongLong, 1108 Int128, // __int128_t 1109 1110 Float, Double, LongDouble, 1111 1112 NullPtr, // This is the type of C++0x 'nullptr'. 1113 1114 /// This represents the type of an expression whose type is 1115 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1116 /// appear in situations where the structure of the type is 1117 /// theoretically deducible. 1118 Dependent, 1119 1120 Overload, // This represents the type of an overloaded function declaration. 1121 1122 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1123 // that has not been deduced yet. 1124 1125 /// The primitive Objective C 'id' type. The type pointed to by the 1126 /// user-visible 'id' type. Only ever shows up in an AST as the base 1127 /// type of an ObjCObjectType. 1128 ObjCId, 1129 1130 /// The primitive Objective C 'Class' type. The type pointed to by the 1131 /// user-visible 'Class' type. Only ever shows up in an AST as the 1132 /// base type of an ObjCObjectType. 1133 ObjCClass, 1134 1135 ObjCSel // This represents the ObjC 'SEL' type. 1136 }; 1137private: 1138 Kind TypeKind; 1139 1140protected: 1141 virtual Linkage getLinkageImpl() const; 1142 1143public: 1144 BuiltinType(Kind K) 1145 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1146 TypeKind(K) {} 1147 1148 Kind getKind() const { return TypeKind; } 1149 const char *getName(const LangOptions &LO) const; 1150 1151 bool isSugared() const { return false; } 1152 QualType desugar() const { return QualType(this, 0); } 1153 1154 bool isInteger() const { 1155 return TypeKind >= Bool && TypeKind <= Int128; 1156 } 1157 1158 bool isSignedInteger() const { 1159 return TypeKind >= Char_S && TypeKind <= Int128; 1160 } 1161 1162 bool isUnsignedInteger() const { 1163 return TypeKind >= Bool && TypeKind <= UInt128; 1164 } 1165 1166 bool isFloatingPoint() const { 1167 return TypeKind >= Float && TypeKind <= LongDouble; 1168 } 1169 1170 /// Determines whether this type is a "forbidden" placeholder type, 1171 /// i.e. a type which cannot appear in arbitrary positions in a 1172 /// fully-formed expression. 1173 bool isPlaceholderType() const { 1174 return TypeKind == Overload || 1175 TypeKind == UndeducedAuto; 1176 } 1177 1178 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1179 static bool classof(const BuiltinType *) { return true; } 1180}; 1181 1182/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1183/// types (_Complex float etc) as well as the GCC integer complex extensions. 1184/// 1185class ComplexType : public Type, public llvm::FoldingSetNode { 1186 QualType ElementType; 1187 ComplexType(QualType Element, QualType CanonicalPtr) : 1188 Type(Complex, CanonicalPtr, Element->isDependentType()), 1189 ElementType(Element) { 1190 } 1191 friend class ASTContext; // ASTContext creates these. 1192 1193protected: 1194 virtual Linkage getLinkageImpl() const; 1195 1196public: 1197 QualType getElementType() const { return ElementType; } 1198 1199 bool isSugared() const { return false; } 1200 QualType desugar() const { return QualType(this, 0); } 1201 1202 void Profile(llvm::FoldingSetNodeID &ID) { 1203 Profile(ID, getElementType()); 1204 } 1205 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1206 ID.AddPointer(Element.getAsOpaquePtr()); 1207 } 1208 1209 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1210 static bool classof(const ComplexType *) { return true; } 1211}; 1212 1213/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1214/// 1215class PointerType : public Type, public llvm::FoldingSetNode { 1216 QualType PointeeType; 1217 1218 PointerType(QualType Pointee, QualType CanonicalPtr) : 1219 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1220 } 1221 friend class ASTContext; // ASTContext creates these. 1222 1223protected: 1224 virtual Linkage getLinkageImpl() const; 1225 1226public: 1227 1228 QualType getPointeeType() const { return PointeeType; } 1229 1230 bool isSugared() const { return false; } 1231 QualType desugar() const { return QualType(this, 0); } 1232 1233 void Profile(llvm::FoldingSetNodeID &ID) { 1234 Profile(ID, getPointeeType()); 1235 } 1236 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1237 ID.AddPointer(Pointee.getAsOpaquePtr()); 1238 } 1239 1240 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1241 static bool classof(const PointerType *) { return true; } 1242}; 1243 1244/// BlockPointerType - pointer to a block type. 1245/// This type is to represent types syntactically represented as 1246/// "void (^)(int)", etc. Pointee is required to always be a function type. 1247/// 1248class BlockPointerType : public Type, public llvm::FoldingSetNode { 1249 QualType PointeeType; // Block is some kind of pointer type 1250 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1251 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1252 PointeeType(Pointee) { 1253 } 1254 friend class ASTContext; // ASTContext creates these. 1255 1256protected: 1257 virtual Linkage getLinkageImpl() const; 1258 1259public: 1260 1261 // Get the pointee type. Pointee is required to always be a function type. 1262 QualType getPointeeType() const { return PointeeType; } 1263 1264 bool isSugared() const { return false; } 1265 QualType desugar() const { return QualType(this, 0); } 1266 1267 void Profile(llvm::FoldingSetNodeID &ID) { 1268 Profile(ID, getPointeeType()); 1269 } 1270 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1271 ID.AddPointer(Pointee.getAsOpaquePtr()); 1272 } 1273 1274 static bool classof(const Type *T) { 1275 return T->getTypeClass() == BlockPointer; 1276 } 1277 static bool classof(const BlockPointerType *) { return true; } 1278}; 1279 1280/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1281/// 1282class ReferenceType : public Type, public llvm::FoldingSetNode { 1283 QualType PointeeType; 1284 1285 /// True if the type was originally spelled with an lvalue sigil. 1286 /// This is never true of rvalue references but can also be false 1287 /// on lvalue references because of C++0x [dcl.typedef]p9, 1288 /// as follows: 1289 /// 1290 /// typedef int &ref; // lvalue, spelled lvalue 1291 /// typedef int &&rvref; // rvalue 1292 /// ref &a; // lvalue, inner ref, spelled lvalue 1293 /// ref &&a; // lvalue, inner ref 1294 /// rvref &a; // lvalue, inner ref, spelled lvalue 1295 /// rvref &&a; // rvalue, inner ref 1296 bool SpelledAsLValue; 1297 1298 /// True if the inner type is a reference type. This only happens 1299 /// in non-canonical forms. 1300 bool InnerRef; 1301 1302protected: 1303 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1304 bool SpelledAsLValue) : 1305 Type(tc, CanonicalRef, Referencee->isDependentType()), 1306 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1307 InnerRef(Referencee->isReferenceType()) { 1308 } 1309 1310 virtual Linkage getLinkageImpl() const; 1311 1312public: 1313 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1314 bool isInnerRef() const { return InnerRef; } 1315 1316 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1317 QualType getPointeeType() const { 1318 // FIXME: this might strip inner qualifiers; okay? 1319 const ReferenceType *T = this; 1320 while (T->InnerRef) 1321 T = T->PointeeType->getAs<ReferenceType>(); 1322 return T->PointeeType; 1323 } 1324 1325 void Profile(llvm::FoldingSetNodeID &ID) { 1326 Profile(ID, PointeeType, SpelledAsLValue); 1327 } 1328 static void Profile(llvm::FoldingSetNodeID &ID, 1329 QualType Referencee, 1330 bool SpelledAsLValue) { 1331 ID.AddPointer(Referencee.getAsOpaquePtr()); 1332 ID.AddBoolean(SpelledAsLValue); 1333 } 1334 1335 static bool classof(const Type *T) { 1336 return T->getTypeClass() == LValueReference || 1337 T->getTypeClass() == RValueReference; 1338 } 1339 static bool classof(const ReferenceType *) { return true; } 1340}; 1341 1342/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1343/// 1344class LValueReferenceType : public ReferenceType { 1345 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1346 bool SpelledAsLValue) : 1347 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1348 {} 1349 friend class ASTContext; // ASTContext creates these 1350public: 1351 bool isSugared() const { return false; } 1352 QualType desugar() const { return QualType(this, 0); } 1353 1354 static bool classof(const Type *T) { 1355 return T->getTypeClass() == LValueReference; 1356 } 1357 static bool classof(const LValueReferenceType *) { return true; } 1358}; 1359 1360/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1361/// 1362class RValueReferenceType : public ReferenceType { 1363 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1364 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1365 } 1366 friend class ASTContext; // ASTContext creates these 1367public: 1368 bool isSugared() const { return false; } 1369 QualType desugar() const { return QualType(this, 0); } 1370 1371 static bool classof(const Type *T) { 1372 return T->getTypeClass() == RValueReference; 1373 } 1374 static bool classof(const RValueReferenceType *) { return true; } 1375}; 1376 1377/// MemberPointerType - C++ 8.3.3 - Pointers to members 1378/// 1379class MemberPointerType : public Type, public llvm::FoldingSetNode { 1380 QualType PointeeType; 1381 /// The class of which the pointee is a member. Must ultimately be a 1382 /// RecordType, but could be a typedef or a template parameter too. 1383 const Type *Class; 1384 1385 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1386 Type(MemberPointer, CanonicalPtr, 1387 Cls->isDependentType() || Pointee->isDependentType()), 1388 PointeeType(Pointee), Class(Cls) { 1389 } 1390 friend class ASTContext; // ASTContext creates these. 1391 1392protected: 1393 virtual Linkage getLinkageImpl() const; 1394 1395public: 1396 QualType getPointeeType() const { return PointeeType; } 1397 1398 /// Returns true if the member type (i.e. the pointee type) is a 1399 /// function type rather than a data-member type. 1400 bool isMemberFunctionPointer() const { 1401 return PointeeType->isFunctionProtoType(); 1402 } 1403 1404 /// Returns true if the member type (i.e. the pointee type) is a 1405 /// data type rather than a function type. 1406 bool isMemberDataPointer() const { 1407 return !PointeeType->isFunctionProtoType(); 1408 } 1409 1410 const Type *getClass() const { return Class; } 1411 1412 bool isSugared() const { return false; } 1413 QualType desugar() const { return QualType(this, 0); } 1414 1415 void Profile(llvm::FoldingSetNodeID &ID) { 1416 Profile(ID, getPointeeType(), getClass()); 1417 } 1418 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1419 const Type *Class) { 1420 ID.AddPointer(Pointee.getAsOpaquePtr()); 1421 ID.AddPointer(Class); 1422 } 1423 1424 static bool classof(const Type *T) { 1425 return T->getTypeClass() == MemberPointer; 1426 } 1427 static bool classof(const MemberPointerType *) { return true; } 1428}; 1429 1430/// ArrayType - C99 6.7.5.2 - Array Declarators. 1431/// 1432class ArrayType : public Type, public llvm::FoldingSetNode { 1433public: 1434 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1435 /// an array with a static size (e.g. int X[static 4]), or an array 1436 /// with a star size (e.g. int X[*]). 1437 /// 'static' is only allowed on function parameters. 1438 enum ArraySizeModifier { 1439 Normal, Static, Star 1440 }; 1441private: 1442 /// ElementType - The element type of the array. 1443 QualType ElementType; 1444 1445 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1446 /// NOTE: These fields are packed into the bitfields space in the Type class. 1447 unsigned SizeModifier : 2; 1448 1449 /// IndexTypeQuals - Capture qualifiers in declarations like: 1450 /// 'int X[static restrict 4]'. For function parameters only. 1451 unsigned IndexTypeQuals : 3; 1452 1453protected: 1454 // C++ [temp.dep.type]p1: 1455 // A type is dependent if it is... 1456 // - an array type constructed from any dependent type or whose 1457 // size is specified by a constant expression that is 1458 // value-dependent, 1459 ArrayType(TypeClass tc, QualType et, QualType can, 1460 ArraySizeModifier sm, unsigned tq) 1461 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1462 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1463 1464 friend class ASTContext; // ASTContext creates these. 1465 1466 virtual Linkage getLinkageImpl() const; 1467 1468public: 1469 QualType getElementType() const { return ElementType; } 1470 ArraySizeModifier getSizeModifier() const { 1471 return ArraySizeModifier(SizeModifier); 1472 } 1473 Qualifiers getIndexTypeQualifiers() const { 1474 return Qualifiers::fromCVRMask(IndexTypeQuals); 1475 } 1476 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1477 1478 static bool classof(const Type *T) { 1479 return T->getTypeClass() == ConstantArray || 1480 T->getTypeClass() == VariableArray || 1481 T->getTypeClass() == IncompleteArray || 1482 T->getTypeClass() == DependentSizedArray; 1483 } 1484 static bool classof(const ArrayType *) { return true; } 1485}; 1486 1487/// ConstantArrayType - This class represents the canonical version of 1488/// C arrays with a specified constant size. For example, the canonical 1489/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1490/// type is 'int' and the size is 404. 1491class ConstantArrayType : public ArrayType { 1492 llvm::APInt Size; // Allows us to unique the type. 1493 1494 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1495 ArraySizeModifier sm, unsigned tq) 1496 : ArrayType(ConstantArray, et, can, sm, tq), 1497 Size(size) {} 1498protected: 1499 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1500 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1501 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1502 friend class ASTContext; // ASTContext creates these. 1503public: 1504 const llvm::APInt &getSize() const { return Size; } 1505 bool isSugared() const { return false; } 1506 QualType desugar() const { return QualType(this, 0); } 1507 1508 1509 /// \brief Determine the number of bits required to address a member of 1510 // an array with the given element type and number of elements. 1511 static unsigned getNumAddressingBits(ASTContext &Context, 1512 QualType ElementType, 1513 const llvm::APInt &NumElements); 1514 1515 /// \brief Determine the maximum number of active bits that an array's size 1516 /// can require, which limits the maximum size of the array. 1517 static unsigned getMaxSizeBits(ASTContext &Context); 1518 1519 void Profile(llvm::FoldingSetNodeID &ID) { 1520 Profile(ID, getElementType(), getSize(), 1521 getSizeModifier(), getIndexTypeCVRQualifiers()); 1522 } 1523 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1524 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1525 unsigned TypeQuals) { 1526 ID.AddPointer(ET.getAsOpaquePtr()); 1527 ID.AddInteger(ArraySize.getZExtValue()); 1528 ID.AddInteger(SizeMod); 1529 ID.AddInteger(TypeQuals); 1530 } 1531 static bool classof(const Type *T) { 1532 return T->getTypeClass() == ConstantArray; 1533 } 1534 static bool classof(const ConstantArrayType *) { return true; } 1535}; 1536 1537/// IncompleteArrayType - This class represents C arrays with an unspecified 1538/// size. For example 'int A[]' has an IncompleteArrayType where the element 1539/// type is 'int' and the size is unspecified. 1540class IncompleteArrayType : public ArrayType { 1541 1542 IncompleteArrayType(QualType et, QualType can, 1543 ArraySizeModifier sm, unsigned tq) 1544 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1545 friend class ASTContext; // ASTContext creates these. 1546public: 1547 bool isSugared() const { return false; } 1548 QualType desugar() const { return QualType(this, 0); } 1549 1550 static bool classof(const Type *T) { 1551 return T->getTypeClass() == IncompleteArray; 1552 } 1553 static bool classof(const IncompleteArrayType *) { return true; } 1554 1555 friend class StmtIteratorBase; 1556 1557 void Profile(llvm::FoldingSetNodeID &ID) { 1558 Profile(ID, getElementType(), getSizeModifier(), 1559 getIndexTypeCVRQualifiers()); 1560 } 1561 1562 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1563 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1564 ID.AddPointer(ET.getAsOpaquePtr()); 1565 ID.AddInteger(SizeMod); 1566 ID.AddInteger(TypeQuals); 1567 } 1568}; 1569 1570/// VariableArrayType - This class represents C arrays with a specified size 1571/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1572/// Since the size expression is an arbitrary expression, we store it as such. 1573/// 1574/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1575/// should not be: two lexically equivalent variable array types could mean 1576/// different things, for example, these variables do not have the same type 1577/// dynamically: 1578/// 1579/// void foo(int x) { 1580/// int Y[x]; 1581/// ++x; 1582/// int Z[x]; 1583/// } 1584/// 1585class VariableArrayType : public ArrayType { 1586 /// SizeExpr - An assignment expression. VLA's are only permitted within 1587 /// a function block. 1588 Stmt *SizeExpr; 1589 /// Brackets - The left and right array brackets. 1590 SourceRange Brackets; 1591 1592 VariableArrayType(QualType et, QualType can, Expr *e, 1593 ArraySizeModifier sm, unsigned tq, 1594 SourceRange brackets) 1595 : ArrayType(VariableArray, et, can, sm, tq), 1596 SizeExpr((Stmt*) e), Brackets(brackets) {} 1597 friend class ASTContext; // ASTContext creates these. 1598 1599public: 1600 Expr *getSizeExpr() const { 1601 // We use C-style casts instead of cast<> here because we do not wish 1602 // to have a dependency of Type.h on Stmt.h/Expr.h. 1603 return (Expr*) SizeExpr; 1604 } 1605 SourceRange getBracketsRange() const { return Brackets; } 1606 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1607 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1608 1609 bool isSugared() const { return false; } 1610 QualType desugar() const { return QualType(this, 0); } 1611 1612 static bool classof(const Type *T) { 1613 return T->getTypeClass() == VariableArray; 1614 } 1615 static bool classof(const VariableArrayType *) { return true; } 1616 1617 friend class StmtIteratorBase; 1618 1619 void Profile(llvm::FoldingSetNodeID &ID) { 1620 assert(0 && "Cannnot unique VariableArrayTypes."); 1621 } 1622}; 1623 1624/// DependentSizedArrayType - This type represents an array type in 1625/// C++ whose size is a value-dependent expression. For example: 1626/// 1627/// \code 1628/// template<typename T, int Size> 1629/// class array { 1630/// T data[Size]; 1631/// }; 1632/// \endcode 1633/// 1634/// For these types, we won't actually know what the array bound is 1635/// until template instantiation occurs, at which point this will 1636/// become either a ConstantArrayType or a VariableArrayType. 1637class DependentSizedArrayType : public ArrayType { 1638 ASTContext &Context; 1639 1640 /// \brief An assignment expression that will instantiate to the 1641 /// size of the array. 1642 /// 1643 /// The expression itself might be NULL, in which case the array 1644 /// type will have its size deduced from an initializer. 1645 Stmt *SizeExpr; 1646 1647 /// Brackets - The left and right array brackets. 1648 SourceRange Brackets; 1649 1650 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1651 Expr *e, ArraySizeModifier sm, unsigned tq, 1652 SourceRange brackets) 1653 : ArrayType(DependentSizedArray, et, can, sm, tq), 1654 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1655 friend class ASTContext; // ASTContext creates these. 1656 1657public: 1658 Expr *getSizeExpr() const { 1659 // We use C-style casts instead of cast<> here because we do not wish 1660 // to have a dependency of Type.h on Stmt.h/Expr.h. 1661 return (Expr*) SizeExpr; 1662 } 1663 SourceRange getBracketsRange() const { return Brackets; } 1664 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1665 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1666 1667 bool isSugared() const { return false; } 1668 QualType desugar() const { return QualType(this, 0); } 1669 1670 static bool classof(const Type *T) { 1671 return T->getTypeClass() == DependentSizedArray; 1672 } 1673 static bool classof(const DependentSizedArrayType *) { return true; } 1674 1675 friend class StmtIteratorBase; 1676 1677 1678 void Profile(llvm::FoldingSetNodeID &ID) { 1679 Profile(ID, Context, getElementType(), 1680 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1681 } 1682 1683 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1684 QualType ET, ArraySizeModifier SizeMod, 1685 unsigned TypeQuals, Expr *E); 1686}; 1687 1688/// DependentSizedExtVectorType - This type represent an extended vector type 1689/// where either the type or size is dependent. For example: 1690/// @code 1691/// template<typename T, int Size> 1692/// class vector { 1693/// typedef T __attribute__((ext_vector_type(Size))) type; 1694/// } 1695/// @endcode 1696class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1697 ASTContext &Context; 1698 Expr *SizeExpr; 1699 /// ElementType - The element type of the array. 1700 QualType ElementType; 1701 SourceLocation loc; 1702 1703 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1704 QualType can, Expr *SizeExpr, SourceLocation loc) 1705 : Type (DependentSizedExtVector, can, true), 1706 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1707 loc(loc) {} 1708 friend class ASTContext; 1709 1710public: 1711 Expr *getSizeExpr() const { return SizeExpr; } 1712 QualType getElementType() const { return ElementType; } 1713 SourceLocation getAttributeLoc() const { return loc; } 1714 1715 bool isSugared() const { return false; } 1716 QualType desugar() const { return QualType(this, 0); } 1717 1718 static bool classof(const Type *T) { 1719 return T->getTypeClass() == DependentSizedExtVector; 1720 } 1721 static bool classof(const DependentSizedExtVectorType *) { return true; } 1722 1723 void Profile(llvm::FoldingSetNodeID &ID) { 1724 Profile(ID, Context, getElementType(), getSizeExpr()); 1725 } 1726 1727 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1728 QualType ElementType, Expr *SizeExpr); 1729}; 1730 1731 1732/// VectorType - GCC generic vector type. This type is created using 1733/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1734/// bytes; or from an Altivec __vector or vector declaration. 1735/// Since the constructor takes the number of vector elements, the 1736/// client is responsible for converting the size into the number of elements. 1737class VectorType : public Type, public llvm::FoldingSetNode { 1738public: 1739 enum AltiVecSpecific { 1740 NotAltiVec, // is not AltiVec vector 1741 AltiVec, // is AltiVec vector 1742 Pixel, // is AltiVec 'vector Pixel' 1743 Bool // is AltiVec 'vector bool ...' 1744 }; 1745protected: 1746 /// ElementType - The element type of the vector. 1747 QualType ElementType; 1748 1749 /// NumElements - The number of elements in the vector. 1750 unsigned NumElements; 1751 1752 AltiVecSpecific AltiVecSpec; 1753 1754 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1755 AltiVecSpecific altiVecSpec) : 1756 Type(Vector, canonType, vecType->isDependentType()), 1757 ElementType(vecType), NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1758 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1759 QualType canonType, AltiVecSpecific altiVecSpec) 1760 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1761 NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1762 friend class ASTContext; // ASTContext creates these. 1763 1764 virtual Linkage getLinkageImpl() const; 1765 1766public: 1767 1768 QualType getElementType() const { return ElementType; } 1769 unsigned getNumElements() const { return NumElements; } 1770 1771 bool isSugared() const { return false; } 1772 QualType desugar() const { return QualType(this, 0); } 1773 1774 AltiVecSpecific getAltiVecSpecific() const { return AltiVecSpec; } 1775 1776 void Profile(llvm::FoldingSetNodeID &ID) { 1777 Profile(ID, getElementType(), getNumElements(), getTypeClass(), AltiVecSpec); 1778 } 1779 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1780 unsigned NumElements, TypeClass TypeClass, 1781 unsigned AltiVecSpec) { 1782 ID.AddPointer(ElementType.getAsOpaquePtr()); 1783 ID.AddInteger(NumElements); 1784 ID.AddInteger(TypeClass); 1785 ID.AddInteger(AltiVecSpec); 1786 } 1787 1788 static bool classof(const Type *T) { 1789 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1790 } 1791 static bool classof(const VectorType *) { return true; } 1792}; 1793 1794/// ExtVectorType - Extended vector type. This type is created using 1795/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1796/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1797/// class enables syntactic extensions, like Vector Components for accessing 1798/// points, colors, and textures (modeled after OpenGL Shading Language). 1799class ExtVectorType : public VectorType { 1800 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1801 VectorType(ExtVector, vecType, nElements, canonType, NotAltiVec) {} 1802 friend class ASTContext; // ASTContext creates these. 1803public: 1804 static int getPointAccessorIdx(char c) { 1805 switch (c) { 1806 default: return -1; 1807 case 'x': return 0; 1808 case 'y': return 1; 1809 case 'z': return 2; 1810 case 'w': return 3; 1811 } 1812 } 1813 static int getNumericAccessorIdx(char c) { 1814 switch (c) { 1815 default: return -1; 1816 case '0': return 0; 1817 case '1': return 1; 1818 case '2': return 2; 1819 case '3': return 3; 1820 case '4': return 4; 1821 case '5': return 5; 1822 case '6': return 6; 1823 case '7': return 7; 1824 case '8': return 8; 1825 case '9': return 9; 1826 case 'A': 1827 case 'a': return 10; 1828 case 'B': 1829 case 'b': return 11; 1830 case 'C': 1831 case 'c': return 12; 1832 case 'D': 1833 case 'd': return 13; 1834 case 'E': 1835 case 'e': return 14; 1836 case 'F': 1837 case 'f': return 15; 1838 } 1839 } 1840 1841 static int getAccessorIdx(char c) { 1842 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1843 return getNumericAccessorIdx(c); 1844 } 1845 1846 bool isAccessorWithinNumElements(char c) const { 1847 if (int idx = getAccessorIdx(c)+1) 1848 return unsigned(idx-1) < NumElements; 1849 return false; 1850 } 1851 bool isSugared() const { return false; } 1852 QualType desugar() const { return QualType(this, 0); } 1853 1854 static bool classof(const Type *T) { 1855 return T->getTypeClass() == ExtVector; 1856 } 1857 static bool classof(const ExtVectorType *) { return true; } 1858}; 1859 1860/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1861/// class of FunctionNoProtoType and FunctionProtoType. 1862/// 1863class FunctionType : public Type { 1864 virtual void ANCHOR(); // Key function for FunctionType. 1865 1866 /// SubClassData - This field is owned by the subclass, put here to pack 1867 /// tightly with the ivars in Type. 1868 bool SubClassData : 1; 1869 1870 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1871 /// other bitfields. 1872 /// The qualifiers are part of FunctionProtoType because... 1873 /// 1874 /// C++ 8.3.5p4: The return type, the parameter type list and the 1875 /// cv-qualifier-seq, [...], are part of the function type. 1876 /// 1877 unsigned TypeQuals : 3; 1878 1879 /// NoReturn - Indicates if the function type is attribute noreturn. 1880 unsigned NoReturn : 1; 1881 1882 /// RegParm - How many arguments to pass inreg. 1883 unsigned RegParm : 3; 1884 1885 /// CallConv - The calling convention used by the function. 1886 unsigned CallConv : 3; 1887 1888 // The type returned by the function. 1889 QualType ResultType; 1890 1891 public: 1892 // This class is used for passing arround the information needed to 1893 // construct a call. It is not actually used for storage, just for 1894 // factoring together common arguments. 1895 // If you add a field (say Foo), other than the obvious places (both, constructors, 1896 // compile failures), what you need to update is 1897 // * Operetor== 1898 // * getFoo 1899 // * withFoo 1900 // * functionType. Add Foo, getFoo. 1901 // * ASTContext::getFooType 1902 // * ASTContext::mergeFunctionTypes 1903 // * FunctionNoProtoType::Profile 1904 // * FunctionProtoType::Profile 1905 // * TypePrinter::PrintFunctionProto 1906 // * AST read and write 1907 // * Codegen 1908 1909 class ExtInfo { 1910 public: 1911 // Constructor with no defaults. Use this when you know that you 1912 // have all the elements (when reading an AST file for example). 1913 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1914 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1915 1916 // Constructor with all defaults. Use when for example creating a 1917 // function know to use defaults. 1918 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1919 1920 bool getNoReturn() const { return NoReturn; } 1921 unsigned getRegParm() const { return RegParm; } 1922 CallingConv getCC() const { return CC; } 1923 1924 bool operator==(const ExtInfo &Other) const { 1925 return getNoReturn() == Other.getNoReturn() && 1926 getRegParm() == Other.getRegParm() && 1927 getCC() == Other.getCC(); 1928 } 1929 bool operator!=(const ExtInfo &Other) const { 1930 return !(*this == Other); 1931 } 1932 1933 // Note that we don't have setters. That is by design, use 1934 // the following with methods instead of mutating these objects. 1935 1936 ExtInfo withNoReturn(bool noReturn) const { 1937 return ExtInfo(noReturn, getRegParm(), getCC()); 1938 } 1939 1940 ExtInfo withRegParm(unsigned RegParm) const { 1941 return ExtInfo(getNoReturn(), RegParm, getCC()); 1942 } 1943 1944 ExtInfo withCallingConv(CallingConv cc) const { 1945 return ExtInfo(getNoReturn(), getRegParm(), cc); 1946 } 1947 1948 private: 1949 // True if we have __attribute__((noreturn)) 1950 bool NoReturn; 1951 // The value passed to __attribute__((regparm(x))) 1952 unsigned RegParm; 1953 // The calling convention as specified via 1954 // __attribute__((cdecl|stdcall|fastcall|thiscall|pascal)) 1955 CallingConv CC; 1956 }; 1957 1958protected: 1959 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1960 unsigned typeQuals, QualType Canonical, bool Dependent, 1961 const ExtInfo &Info) 1962 : Type(tc, Canonical, Dependent), 1963 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1964 NoReturn(Info.getNoReturn()), 1965 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1966 bool getSubClassData() const { return SubClassData; } 1967 unsigned getTypeQuals() const { return TypeQuals; } 1968public: 1969 1970 QualType getResultType() const { return ResultType; } 1971 1972 unsigned getRegParmType() const { return RegParm; } 1973 bool getNoReturnAttr() const { return NoReturn; } 1974 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1975 ExtInfo getExtInfo() const { 1976 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1977 } 1978 1979 /// \brief Determine the type of an expression that calls a function of 1980 /// this type. 1981 QualType getCallResultType(ASTContext &Context) const { 1982 return getResultType().getNonLValueExprType(Context); 1983 } 1984 1985 static llvm::StringRef getNameForCallConv(CallingConv CC); 1986 1987 static bool classof(const Type *T) { 1988 return T->getTypeClass() == FunctionNoProto || 1989 T->getTypeClass() == FunctionProto; 1990 } 1991 static bool classof(const FunctionType *) { return true; } 1992}; 1993 1994/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1995/// no information available about its arguments. 1996class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1997 FunctionNoProtoType(QualType Result, QualType Canonical, 1998 const ExtInfo &Info) 1999 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2000 /*Dependent=*/false, Info) {} 2001 friend class ASTContext; // ASTContext creates these. 2002 2003protected: 2004 virtual Linkage getLinkageImpl() const; 2005 2006public: 2007 // No additional state past what FunctionType provides. 2008 2009 bool isSugared() const { return false; } 2010 QualType desugar() const { return QualType(this, 0); } 2011 2012 void Profile(llvm::FoldingSetNodeID &ID) { 2013 Profile(ID, getResultType(), getExtInfo()); 2014 } 2015 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2016 const ExtInfo &Info) { 2017 ID.AddInteger(Info.getCC()); 2018 ID.AddInteger(Info.getRegParm()); 2019 ID.AddInteger(Info.getNoReturn()); 2020 ID.AddPointer(ResultType.getAsOpaquePtr()); 2021 } 2022 2023 static bool classof(const Type *T) { 2024 return T->getTypeClass() == FunctionNoProto; 2025 } 2026 static bool classof(const FunctionNoProtoType *) { return true; } 2027}; 2028 2029/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2030/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2031/// arguments, not as having a single void argument. Such a type can have an 2032/// exception specification, but this specification is not part of the canonical 2033/// type. 2034class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2035 /// hasAnyDependentType - Determine whether there are any dependent 2036 /// types within the arguments passed in. 2037 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 2038 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2039 if (ArgArray[Idx]->isDependentType()) 2040 return true; 2041 2042 return false; 2043 } 2044 2045 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2046 bool isVariadic, unsigned typeQuals, bool hasExs, 2047 bool hasAnyExs, const QualType *ExArray, 2048 unsigned numExs, QualType Canonical, 2049 const ExtInfo &Info) 2050 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 2051 (Result->isDependentType() || 2052 hasAnyDependentType(ArgArray, numArgs)), 2053 Info), 2054 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 2055 AnyExceptionSpec(hasAnyExs) { 2056 // Fill in the trailing argument array. 2057 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 2058 for (unsigned i = 0; i != numArgs; ++i) 2059 ArgInfo[i] = ArgArray[i]; 2060 // Fill in the exception array. 2061 QualType *Ex = ArgInfo + numArgs; 2062 for (unsigned i = 0; i != numExs; ++i) 2063 Ex[i] = ExArray[i]; 2064 } 2065 2066 /// NumArgs - The number of arguments this function has, not counting '...'. 2067 unsigned NumArgs : 20; 2068 2069 /// NumExceptions - The number of types in the exception spec, if any. 2070 unsigned NumExceptions : 10; 2071 2072 /// HasExceptionSpec - Whether this function has an exception spec at all. 2073 bool HasExceptionSpec : 1; 2074 2075 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2076 bool AnyExceptionSpec : 1; 2077 2078 /// ArgInfo - There is an variable size array after the class in memory that 2079 /// holds the argument types. 2080 2081 /// Exceptions - There is another variable size array after ArgInfo that 2082 /// holds the exception types. 2083 2084 friend class ASTContext; // ASTContext creates these. 2085 2086protected: 2087 virtual Linkage getLinkageImpl() const; 2088 2089public: 2090 unsigned getNumArgs() const { return NumArgs; } 2091 QualType getArgType(unsigned i) const { 2092 assert(i < NumArgs && "Invalid argument number!"); 2093 return arg_type_begin()[i]; 2094 } 2095 2096 bool hasExceptionSpec() const { return HasExceptionSpec; } 2097 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2098 unsigned getNumExceptions() const { return NumExceptions; } 2099 QualType getExceptionType(unsigned i) const { 2100 assert(i < NumExceptions && "Invalid exception number!"); 2101 return exception_begin()[i]; 2102 } 2103 bool hasEmptyExceptionSpec() const { 2104 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2105 getNumExceptions() == 0; 2106 } 2107 2108 bool isVariadic() const { return getSubClassData(); } 2109 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2110 2111 typedef const QualType *arg_type_iterator; 2112 arg_type_iterator arg_type_begin() const { 2113 return reinterpret_cast<const QualType *>(this+1); 2114 } 2115 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2116 2117 typedef const QualType *exception_iterator; 2118 exception_iterator exception_begin() const { 2119 // exceptions begin where arguments end 2120 return arg_type_end(); 2121 } 2122 exception_iterator exception_end() const { 2123 return exception_begin() + NumExceptions; 2124 } 2125 2126 bool isSugared() const { return false; } 2127 QualType desugar() const { return QualType(this, 0); } 2128 2129 static bool classof(const Type *T) { 2130 return T->getTypeClass() == FunctionProto; 2131 } 2132 static bool classof(const FunctionProtoType *) { return true; } 2133 2134 void Profile(llvm::FoldingSetNodeID &ID); 2135 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2136 arg_type_iterator ArgTys, unsigned NumArgs, 2137 bool isVariadic, unsigned TypeQuals, 2138 bool hasExceptionSpec, bool anyExceptionSpec, 2139 unsigned NumExceptions, exception_iterator Exs, 2140 const ExtInfo &ExtInfo); 2141}; 2142 2143 2144/// \brief Represents the dependent type named by a dependently-scoped 2145/// typename using declaration, e.g. 2146/// using typename Base<T>::foo; 2147/// Template instantiation turns these into the underlying type. 2148class UnresolvedUsingType : public Type { 2149 UnresolvedUsingTypenameDecl *Decl; 2150 2151 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2152 : Type(UnresolvedUsing, QualType(), true), 2153 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2154 friend class ASTContext; // ASTContext creates these. 2155public: 2156 2157 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2158 2159 bool isSugared() const { return false; } 2160 QualType desugar() const { return QualType(this, 0); } 2161 2162 static bool classof(const Type *T) { 2163 return T->getTypeClass() == UnresolvedUsing; 2164 } 2165 static bool classof(const UnresolvedUsingType *) { return true; } 2166 2167 void Profile(llvm::FoldingSetNodeID &ID) { 2168 return Profile(ID, Decl); 2169 } 2170 static void Profile(llvm::FoldingSetNodeID &ID, 2171 UnresolvedUsingTypenameDecl *D) { 2172 ID.AddPointer(D); 2173 } 2174}; 2175 2176 2177class TypedefType : public Type { 2178 TypedefDecl *Decl; 2179protected: 2180 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2181 : Type(tc, can, can->isDependentType()), 2182 Decl(const_cast<TypedefDecl*>(D)) { 2183 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2184 } 2185 friend class ASTContext; // ASTContext creates these. 2186public: 2187 2188 TypedefDecl *getDecl() const { return Decl; } 2189 2190 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2191 /// potentially looking through *all* consecutive typedefs. This returns the 2192 /// sum of the type qualifiers, so if you have: 2193 /// typedef const int A; 2194 /// typedef volatile A B; 2195 /// looking through the typedefs for B will give you "const volatile A". 2196 QualType LookThroughTypedefs() const; 2197 2198 bool isSugared() const { return true; } 2199 QualType desugar() const; 2200 2201 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2202 static bool classof(const TypedefType *) { return true; } 2203}; 2204 2205/// TypeOfExprType (GCC extension). 2206class TypeOfExprType : public Type { 2207 Expr *TOExpr; 2208 2209protected: 2210 TypeOfExprType(Expr *E, QualType can = QualType()); 2211 friend class ASTContext; // ASTContext creates these. 2212public: 2213 Expr *getUnderlyingExpr() const { return TOExpr; } 2214 2215 /// \brief Remove a single level of sugar. 2216 QualType desugar() const; 2217 2218 /// \brief Returns whether this type directly provides sugar. 2219 bool isSugared() const { return true; } 2220 2221 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2222 static bool classof(const TypeOfExprType *) { return true; } 2223}; 2224 2225/// \brief Internal representation of canonical, dependent 2226/// typeof(expr) types. 2227/// 2228/// This class is used internally by the ASTContext to manage 2229/// canonical, dependent types, only. Clients will only see instances 2230/// of this class via TypeOfExprType nodes. 2231class DependentTypeOfExprType 2232 : public TypeOfExprType, public llvm::FoldingSetNode { 2233 ASTContext &Context; 2234 2235public: 2236 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2237 : TypeOfExprType(E), Context(Context) { } 2238 2239 bool isSugared() const { return false; } 2240 QualType desugar() const { return QualType(this, 0); } 2241 2242 void Profile(llvm::FoldingSetNodeID &ID) { 2243 Profile(ID, Context, getUnderlyingExpr()); 2244 } 2245 2246 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2247 Expr *E); 2248}; 2249 2250/// TypeOfType (GCC extension). 2251class TypeOfType : public Type { 2252 QualType TOType; 2253 TypeOfType(QualType T, QualType can) 2254 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2255 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2256 } 2257 friend class ASTContext; // ASTContext creates these. 2258public: 2259 QualType getUnderlyingType() const { return TOType; } 2260 2261 /// \brief Remove a single level of sugar. 2262 QualType desugar() const { return getUnderlyingType(); } 2263 2264 /// \brief Returns whether this type directly provides sugar. 2265 bool isSugared() const { return true; } 2266 2267 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2268 static bool classof(const TypeOfType *) { return true; } 2269}; 2270 2271/// DecltypeType (C++0x) 2272class DecltypeType : public Type { 2273 Expr *E; 2274 2275 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2276 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2277 // from it. 2278 QualType UnderlyingType; 2279 2280protected: 2281 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2282 friend class ASTContext; // ASTContext creates these. 2283public: 2284 Expr *getUnderlyingExpr() const { return E; } 2285 QualType getUnderlyingType() const { return UnderlyingType; } 2286 2287 /// \brief Remove a single level of sugar. 2288 QualType desugar() const { return getUnderlyingType(); } 2289 2290 /// \brief Returns whether this type directly provides sugar. 2291 bool isSugared() const { return !isDependentType(); } 2292 2293 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2294 static bool classof(const DecltypeType *) { return true; } 2295}; 2296 2297/// \brief Internal representation of canonical, dependent 2298/// decltype(expr) types. 2299/// 2300/// This class is used internally by the ASTContext to manage 2301/// canonical, dependent types, only. Clients will only see instances 2302/// of this class via DecltypeType nodes. 2303class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2304 ASTContext &Context; 2305 2306public: 2307 DependentDecltypeType(ASTContext &Context, Expr *E); 2308 2309 bool isSugared() const { return false; } 2310 QualType desugar() const { return QualType(this, 0); } 2311 2312 void Profile(llvm::FoldingSetNodeID &ID) { 2313 Profile(ID, Context, getUnderlyingExpr()); 2314 } 2315 2316 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2317 Expr *E); 2318}; 2319 2320class TagType : public Type { 2321 /// Stores the TagDecl associated with this type. The decl may point to any 2322 /// TagDecl that declares the entity. 2323 TagDecl * decl; 2324 2325protected: 2326 TagType(TypeClass TC, const TagDecl *D, QualType can); 2327 2328 virtual Linkage getLinkageImpl() const; 2329 2330public: 2331 TagDecl *getDecl() const; 2332 2333 /// @brief Determines whether this type is in the process of being 2334 /// defined. 2335 bool isBeingDefined() const; 2336 2337 static bool classof(const Type *T) { 2338 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2339 } 2340 static bool classof(const TagType *) { return true; } 2341 static bool classof(const RecordType *) { return true; } 2342 static bool classof(const EnumType *) { return true; } 2343}; 2344 2345/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2346/// to detect TagType objects of structs/unions/classes. 2347class RecordType : public TagType { 2348protected: 2349 explicit RecordType(const RecordDecl *D) 2350 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2351 explicit RecordType(TypeClass TC, RecordDecl *D) 2352 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2353 friend class ASTContext; // ASTContext creates these. 2354public: 2355 2356 RecordDecl *getDecl() const { 2357 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2358 } 2359 2360 // FIXME: This predicate is a helper to QualType/Type. It needs to 2361 // recursively check all fields for const-ness. If any field is declared 2362 // const, it needs to return false. 2363 bool hasConstFields() const { return false; } 2364 2365 // FIXME: RecordType needs to check when it is created that all fields are in 2366 // the same address space, and return that. 2367 unsigned getAddressSpace() const { return 0; } 2368 2369 bool isSugared() const { return false; } 2370 QualType desugar() const { return QualType(this, 0); } 2371 2372 static bool classof(const TagType *T); 2373 static bool classof(const Type *T) { 2374 return isa<TagType>(T) && classof(cast<TagType>(T)); 2375 } 2376 static bool classof(const RecordType *) { return true; } 2377}; 2378 2379/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2380/// to detect TagType objects of enums. 2381class EnumType : public TagType { 2382 explicit EnumType(const EnumDecl *D) 2383 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2384 friend class ASTContext; // ASTContext creates these. 2385public: 2386 2387 EnumDecl *getDecl() const { 2388 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2389 } 2390 2391 bool isSugared() const { return false; } 2392 QualType desugar() const { return QualType(this, 0); } 2393 2394 static bool classof(const TagType *T); 2395 static bool classof(const Type *T) { 2396 return isa<TagType>(T) && classof(cast<TagType>(T)); 2397 } 2398 static bool classof(const EnumType *) { return true; } 2399}; 2400 2401class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2402 unsigned Depth : 15; 2403 unsigned Index : 16; 2404 unsigned ParameterPack : 1; 2405 IdentifierInfo *Name; 2406 2407 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2408 QualType Canon) 2409 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2410 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2411 2412 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2413 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 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 Replaced(Param) { } 2460 2461 friend class ASTContext; 2462 2463public: 2464 IdentifierInfo *getName() const { return Replaced->getName(); } 2465 2466 /// Gets the template parameter that was substituted for. 2467 const TemplateTypeParmType *getReplacedParameter() const { 2468 return Replaced; 2469 } 2470 2471 /// Gets the type that was substituted for the template 2472 /// parameter. 2473 QualType getReplacementType() const { 2474 return getCanonicalTypeInternal(); 2475 } 2476 2477 bool isSugared() const { return true; } 2478 QualType desugar() const { return getReplacementType(); } 2479 2480 void Profile(llvm::FoldingSetNodeID &ID) { 2481 Profile(ID, getReplacedParameter(), getReplacementType()); 2482 } 2483 static void Profile(llvm::FoldingSetNodeID &ID, 2484 const TemplateTypeParmType *Replaced, 2485 QualType Replacement) { 2486 ID.AddPointer(Replaced); 2487 ID.AddPointer(Replacement.getAsOpaquePtr()); 2488 } 2489 2490 static bool classof(const Type *T) { 2491 return T->getTypeClass() == SubstTemplateTypeParm; 2492 } 2493 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2494}; 2495 2496/// \brief Represents the type of a template specialization as written 2497/// in the source code. 2498/// 2499/// Template specialization types represent the syntactic form of a 2500/// template-id that refers to a type, e.g., @c vector<int>. Some 2501/// template specialization types are syntactic sugar, whose canonical 2502/// type will point to some other type node that represents the 2503/// instantiation or class template specialization. For example, a 2504/// class template specialization type of @c vector<int> will refer to 2505/// a tag type for the instantiation 2506/// @c std::vector<int, std::allocator<int>>. 2507/// 2508/// Other template specialization types, for which the template name 2509/// is dependent, may be canonical types. These types are always 2510/// dependent. 2511class TemplateSpecializationType 2512 : public Type, public llvm::FoldingSetNode { 2513 /// \brief The name of the template being specialized. 2514 TemplateName Template; 2515 2516 /// \brief - The number of template arguments named in this class 2517 /// template specialization. 2518 unsigned NumArgs; 2519 2520 TemplateSpecializationType(TemplateName T, 2521 const TemplateArgument *Args, 2522 unsigned NumArgs, QualType Canon); 2523 2524 friend class ASTContext; // ASTContext creates these 2525 2526public: 2527 /// \brief Determine whether any of the given template arguments are 2528 /// dependent. 2529 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2530 unsigned NumArgs); 2531 2532 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2533 unsigned NumArgs); 2534 2535 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2536 2537 /// \brief Print a template argument list, including the '<' and '>' 2538 /// enclosing the template arguments. 2539 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2540 unsigned NumArgs, 2541 const PrintingPolicy &Policy); 2542 2543 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2544 unsigned NumArgs, 2545 const PrintingPolicy &Policy); 2546 2547 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2548 const PrintingPolicy &Policy); 2549 2550 /// True if this template specialization type matches a current 2551 /// instantiation in the context in which it is found. 2552 bool isCurrentInstantiation() const { 2553 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2554 } 2555 2556 typedef const TemplateArgument * iterator; 2557 2558 iterator begin() const { return getArgs(); } 2559 iterator end() const; // defined inline in TemplateBase.h 2560 2561 /// \brief Retrieve the name of the template that we are specializing. 2562 TemplateName getTemplateName() const { return Template; } 2563 2564 /// \brief Retrieve the template arguments. 2565 const TemplateArgument *getArgs() const { 2566 return reinterpret_cast<const TemplateArgument *>(this + 1); 2567 } 2568 2569 /// \brief Retrieve the number of template arguments. 2570 unsigned getNumArgs() const { return NumArgs; } 2571 2572 /// \brief Retrieve a specific template argument as a type. 2573 /// \precondition @c isArgType(Arg) 2574 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2575 2576 bool isSugared() const { 2577 return !isDependentType() || isCurrentInstantiation(); 2578 } 2579 QualType desugar() const { return getCanonicalTypeInternal(); } 2580 2581 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2582 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2583 } 2584 2585 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2586 const TemplateArgument *Args, 2587 unsigned NumArgs, 2588 ASTContext &Context); 2589 2590 static bool classof(const Type *T) { 2591 return T->getTypeClass() == TemplateSpecialization; 2592 } 2593 static bool classof(const TemplateSpecializationType *T) { return true; } 2594}; 2595 2596/// \brief The injected class name of a C++ class template or class 2597/// template partial specialization. Used to record that a type was 2598/// spelled with a bare identifier rather than as a template-id; the 2599/// equivalent for non-templated classes is just RecordType. 2600/// 2601/// Injected class name types are always dependent. Template 2602/// instantiation turns these into RecordTypes. 2603/// 2604/// Injected class name types are always canonical. This works 2605/// because it is impossible to compare an injected class name type 2606/// with the corresponding non-injected template type, for the same 2607/// reason that it is impossible to directly compare template 2608/// parameters from different dependent contexts: injected class name 2609/// types can only occur within the scope of a particular templated 2610/// declaration, and within that scope every template specialization 2611/// will canonicalize to the injected class name (when appropriate 2612/// according to the rules of the language). 2613class InjectedClassNameType : public Type { 2614 CXXRecordDecl *Decl; 2615 2616 /// The template specialization which this type represents. 2617 /// For example, in 2618 /// template <class T> class A { ... }; 2619 /// this is A<T>, whereas in 2620 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2621 /// this is A<B<X,Y> >. 2622 /// 2623 /// It is always unqualified, always a template specialization type, 2624 /// and always dependent. 2625 QualType InjectedType; 2626 2627 friend class ASTContext; // ASTContext creates these. 2628 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2629 // currently suitable for AST reading, too much 2630 // interdependencies. 2631 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2632 : Type(InjectedClassName, QualType(), true), 2633 Decl(D), InjectedType(TST) { 2634 assert(isa<TemplateSpecializationType>(TST)); 2635 assert(!TST.hasQualifiers()); 2636 assert(TST->isDependentType()); 2637 } 2638 2639public: 2640 QualType getInjectedSpecializationType() const { return InjectedType; } 2641 const TemplateSpecializationType *getInjectedTST() const { 2642 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2643 } 2644 2645 CXXRecordDecl *getDecl() const; 2646 2647 bool isSugared() const { return false; } 2648 QualType desugar() const { return QualType(this, 0); } 2649 2650 static bool classof(const Type *T) { 2651 return T->getTypeClass() == InjectedClassName; 2652 } 2653 static bool classof(const InjectedClassNameType *T) { return true; } 2654}; 2655 2656/// \brief The kind of a tag type. 2657enum TagTypeKind { 2658 /// \brief The "struct" keyword. 2659 TTK_Struct, 2660 /// \brief The "union" keyword. 2661 TTK_Union, 2662 /// \brief The "class" keyword. 2663 TTK_Class, 2664 /// \brief The "enum" keyword. 2665 TTK_Enum 2666}; 2667 2668/// \brief The elaboration keyword that precedes a qualified type name or 2669/// introduces an elaborated-type-specifier. 2670enum ElaboratedTypeKeyword { 2671 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2672 ETK_Struct, 2673 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2674 ETK_Union, 2675 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2676 ETK_Class, 2677 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2678 ETK_Enum, 2679 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2680 /// \c typename T::type. 2681 ETK_Typename, 2682 /// \brief No keyword precedes the qualified type name. 2683 ETK_None 2684}; 2685 2686/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2687/// The keyword in stored in the free bits of the base class. 2688/// Also provides a few static helpers for converting and printing 2689/// elaborated type keyword and tag type kind enumerations. 2690class TypeWithKeyword : public Type { 2691 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2692 unsigned Keyword : 3; 2693 2694protected: 2695 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2696 QualType Canonical, bool dependent) 2697 : Type(tc, Canonical, dependent), Keyword(Keyword) {} 2698 2699public: 2700 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2701 2702 ElaboratedTypeKeyword getKeyword() const { 2703 return static_cast<ElaboratedTypeKeyword>(Keyword); 2704 } 2705 2706 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2707 /// into an elaborated type keyword. 2708 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2709 2710 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2711 /// into a tag type kind. It is an error to provide a type specifier 2712 /// which *isn't* a tag kind here. 2713 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2714 2715 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2716 /// elaborated type keyword. 2717 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2718 2719 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2720 // a TagTypeKind. It is an error to provide an elaborated type keyword 2721 /// which *isn't* a tag kind here. 2722 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2723 2724 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2725 2726 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2727 2728 static const char *getTagTypeKindName(TagTypeKind Kind) { 2729 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2730 } 2731 2732 class CannotCastToThisType {}; 2733 static CannotCastToThisType classof(const Type *); 2734}; 2735 2736/// \brief Represents a type that was referred to using an elaborated type 2737/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2738/// or both. 2739/// 2740/// This type is used to keep track of a type name as written in the 2741/// source code, including tag keywords and any nested-name-specifiers. 2742/// The type itself is always "sugar", used to express what was written 2743/// in the source code but containing no additional semantic information. 2744class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2745 2746 /// \brief The nested name specifier containing the qualifier. 2747 NestedNameSpecifier *NNS; 2748 2749 /// \brief The type that this qualified name refers to. 2750 QualType NamedType; 2751 2752 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2753 QualType NamedType, QualType CanonType) 2754 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2755 NamedType->isDependentType()), 2756 NNS(NNS), NamedType(NamedType) { 2757 assert(!(Keyword == ETK_None && NNS == 0) && 2758 "ElaboratedType cannot have elaborated type keyword " 2759 "and name qualifier both null."); 2760 } 2761 2762 friend class ASTContext; // ASTContext creates these 2763 2764public: 2765 ~ElaboratedType(); 2766 2767 /// \brief Retrieve the qualification on this type. 2768 NestedNameSpecifier *getQualifier() const { return NNS; } 2769 2770 /// \brief Retrieve the type named by the qualified-id. 2771 QualType getNamedType() const { return NamedType; } 2772 2773 /// \brief Remove a single level of sugar. 2774 QualType desugar() const { return getNamedType(); } 2775 2776 /// \brief Returns whether this type directly provides sugar. 2777 bool isSugared() const { return true; } 2778 2779 void Profile(llvm::FoldingSetNodeID &ID) { 2780 Profile(ID, getKeyword(), NNS, NamedType); 2781 } 2782 2783 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2784 NestedNameSpecifier *NNS, QualType NamedType) { 2785 ID.AddInteger(Keyword); 2786 ID.AddPointer(NNS); 2787 NamedType.Profile(ID); 2788 } 2789 2790 static bool classof(const Type *T) { 2791 return T->getTypeClass() == Elaborated; 2792 } 2793 static bool classof(const ElaboratedType *T) { return true; } 2794}; 2795 2796/// \brief Represents a qualified type name for which the type name is 2797/// dependent. 2798/// 2799/// DependentNameType represents a class of dependent types that involve a 2800/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2801/// name of a type. The DependentNameType may start with a "typename" (for a 2802/// typename-specifier), "class", "struct", "union", or "enum" (for a 2803/// dependent elaborated-type-specifier), or nothing (in contexts where we 2804/// know that we must be referring to a type, e.g., in a base class specifier). 2805class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2806 2807 /// \brief The nested name specifier containing the qualifier. 2808 NestedNameSpecifier *NNS; 2809 2810 /// \brief The type that this typename specifier refers to. 2811 const IdentifierInfo *Name; 2812 2813 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2814 const IdentifierInfo *Name, QualType CanonType) 2815 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2816 NNS(NNS), Name(Name) { 2817 assert(NNS->isDependent() && 2818 "DependentNameType requires a dependent nested-name-specifier"); 2819 } 2820 2821 friend class ASTContext; // ASTContext creates these 2822 2823public: 2824 virtual ~DependentNameType(); 2825 2826 /// \brief Retrieve the qualification on this type. 2827 NestedNameSpecifier *getQualifier() const { return NNS; } 2828 2829 /// \brief Retrieve the type named by the typename specifier as an 2830 /// identifier. 2831 /// 2832 /// This routine will return a non-NULL identifier pointer when the 2833 /// form of the original typename was terminated by an identifier, 2834 /// e.g., "typename T::type". 2835 const IdentifierInfo *getIdentifier() const { 2836 return Name; 2837 } 2838 2839 bool isSugared() const { return false; } 2840 QualType desugar() const { return QualType(this, 0); } 2841 2842 void Profile(llvm::FoldingSetNodeID &ID) { 2843 Profile(ID, getKeyword(), NNS, Name); 2844 } 2845 2846 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2847 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2848 ID.AddInteger(Keyword); 2849 ID.AddPointer(NNS); 2850 ID.AddPointer(Name); 2851 } 2852 2853 static bool classof(const Type *T) { 2854 return T->getTypeClass() == DependentName; 2855 } 2856 static bool classof(const DependentNameType *T) { return true; } 2857}; 2858 2859/// DependentTemplateSpecializationType - Represents a template 2860/// specialization type whose template cannot be resolved, e.g. 2861/// A<T>::template B<T> 2862class DependentTemplateSpecializationType : 2863 public TypeWithKeyword, public llvm::FoldingSetNode { 2864 2865 /// \brief The nested name specifier containing the qualifier. 2866 NestedNameSpecifier *NNS; 2867 2868 /// \brief The identifier of the template. 2869 const IdentifierInfo *Name; 2870 2871 /// \brief - The number of template arguments named in this class 2872 /// template specialization. 2873 unsigned NumArgs; 2874 2875 const TemplateArgument *getArgBuffer() const { 2876 return reinterpret_cast<const TemplateArgument*>(this+1); 2877 } 2878 TemplateArgument *getArgBuffer() { 2879 return reinterpret_cast<TemplateArgument*>(this+1); 2880 } 2881 2882 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 2883 NestedNameSpecifier *NNS, 2884 const IdentifierInfo *Name, 2885 unsigned NumArgs, 2886 const TemplateArgument *Args, 2887 QualType Canon); 2888 2889 friend class ASTContext; // ASTContext creates these 2890 2891public: 2892 virtual ~DependentTemplateSpecializationType(); 2893 2894 NestedNameSpecifier *getQualifier() const { return NNS; } 2895 const IdentifierInfo *getIdentifier() const { return Name; } 2896 2897 /// \brief Retrieve the template arguments. 2898 const TemplateArgument *getArgs() const { 2899 return getArgBuffer(); 2900 } 2901 2902 /// \brief Retrieve the number of template arguments. 2903 unsigned getNumArgs() const { return NumArgs; } 2904 2905 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2906 2907 typedef const TemplateArgument * iterator; 2908 iterator begin() const { return getArgs(); } 2909 iterator end() const; // inline in TemplateBase.h 2910 2911 bool isSugared() const { return false; } 2912 QualType desugar() const { return QualType(this, 0); } 2913 2914 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 2915 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 2916 } 2917 2918 static void Profile(llvm::FoldingSetNodeID &ID, 2919 ASTContext &Context, 2920 ElaboratedTypeKeyword Keyword, 2921 NestedNameSpecifier *Qualifier, 2922 const IdentifierInfo *Name, 2923 unsigned NumArgs, 2924 const TemplateArgument *Args); 2925 2926 static bool classof(const Type *T) { 2927 return T->getTypeClass() == DependentTemplateSpecialization; 2928 } 2929 static bool classof(const DependentTemplateSpecializationType *T) { 2930 return true; 2931 } 2932}; 2933 2934/// ObjCObjectType - Represents a class type in Objective C. 2935/// Every Objective C type is a combination of a base type and a 2936/// list of protocols. 2937/// 2938/// Given the following declarations: 2939/// @class C; 2940/// @protocol P; 2941/// 2942/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2943/// with base C and no protocols. 2944/// 2945/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2946/// 2947/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2948/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2949/// and no protocols. 2950/// 2951/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2952/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2953/// this should get its own sugar class to better represent the source. 2954class ObjCObjectType : public Type { 2955 // Pad the bit count up so that NumProtocols is 2-byte aligned 2956 unsigned : BitsRemainingInType - 16; 2957 2958 /// \brief The number of protocols stored after the 2959 /// ObjCObjectPointerType node. 2960 /// 2961 /// These protocols are those written directly on the type. If 2962 /// protocol qualifiers ever become additive, the iterators will 2963 /// get kindof complicated. 2964 /// 2965 /// In the canonical object type, these are sorted alphabetically 2966 /// and uniqued. 2967 unsigned NumProtocols : 16; 2968 2969 /// Either a BuiltinType or an InterfaceType or sugar for either. 2970 QualType BaseType; 2971 2972 ObjCProtocolDecl * const *getProtocolStorage() const { 2973 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2974 } 2975 2976 ObjCProtocolDecl **getProtocolStorage(); 2977 2978protected: 2979 ObjCObjectType(QualType Canonical, QualType Base, 2980 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2981 2982 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2983 ObjCObjectType(enum Nonce_ObjCInterface) 2984 : Type(ObjCInterface, QualType(), false), 2985 NumProtocols(0), 2986 BaseType(QualType(this_(), 0)) {} 2987 2988protected: 2989 Linkage getLinkageImpl() const; // key function 2990 2991public: 2992 /// getBaseType - Gets the base type of this object type. This is 2993 /// always (possibly sugar for) one of: 2994 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 2995 /// user, which is a typedef for an ObjCPointerType) 2996 /// - the 'Class' builtin type (same caveat) 2997 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 2998 QualType getBaseType() const { return BaseType; } 2999 3000 bool isObjCId() const { 3001 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3002 } 3003 bool isObjCClass() const { 3004 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3005 } 3006 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3007 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3008 bool isObjCUnqualifiedIdOrClass() const { 3009 if (!qual_empty()) return false; 3010 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3011 return T->getKind() == BuiltinType::ObjCId || 3012 T->getKind() == BuiltinType::ObjCClass; 3013 return false; 3014 } 3015 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3016 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3017 3018 /// Gets the interface declaration for this object type, if the base type 3019 /// really is an interface. 3020 ObjCInterfaceDecl *getInterface() const; 3021 3022 typedef ObjCProtocolDecl * const *qual_iterator; 3023 3024 qual_iterator qual_begin() const { return getProtocolStorage(); } 3025 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3026 3027 bool qual_empty() const { return getNumProtocols() == 0; } 3028 3029 /// getNumProtocols - Return the number of qualifying protocols in this 3030 /// interface type, or 0 if there are none. 3031 unsigned getNumProtocols() const { return NumProtocols; } 3032 3033 /// \brief Fetch a protocol by index. 3034 ObjCProtocolDecl *getProtocol(unsigned I) const { 3035 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3036 return qual_begin()[I]; 3037 } 3038 3039 bool isSugared() const { return false; } 3040 QualType desugar() const { return QualType(this, 0); } 3041 3042 static bool classof(const Type *T) { 3043 return T->getTypeClass() == ObjCObject || 3044 T->getTypeClass() == ObjCInterface; 3045 } 3046 static bool classof(const ObjCObjectType *) { return true; } 3047}; 3048 3049/// ObjCObjectTypeImpl - A class providing a concrete implementation 3050/// of ObjCObjectType, so as to not increase the footprint of 3051/// ObjCInterfaceType. Code outside of ASTContext and the core type 3052/// system should not reference this type. 3053class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3054 friend class ASTContext; 3055 3056 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3057 // will need to be modified. 3058 3059 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3060 ObjCProtocolDecl * const *Protocols, 3061 unsigned NumProtocols) 3062 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3063 3064public: 3065 void Profile(llvm::FoldingSetNodeID &ID); 3066 static void Profile(llvm::FoldingSetNodeID &ID, 3067 QualType Base, 3068 ObjCProtocolDecl *const *protocols, 3069 unsigned NumProtocols); 3070}; 3071 3072inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3073 return reinterpret_cast<ObjCProtocolDecl**>( 3074 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3075} 3076 3077/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3078/// object oriented design. They basically correspond to C++ classes. There 3079/// are two kinds of interface types, normal interfaces like "NSString" and 3080/// qualified interfaces, which are qualified with a protocol list like 3081/// "NSString<NSCopyable, NSAmazing>". 3082/// 3083/// ObjCInterfaceType guarantees the following properties when considered 3084/// as a subtype of its superclass, ObjCObjectType: 3085/// - There are no protocol qualifiers. To reinforce this, code which 3086/// tries to invoke the protocol methods via an ObjCInterfaceType will 3087/// fail to compile. 3088/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3089/// T->getBaseType() == QualType(T, 0). 3090class ObjCInterfaceType : public ObjCObjectType { 3091 ObjCInterfaceDecl *Decl; 3092 3093 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3094 : ObjCObjectType(Nonce_ObjCInterface), 3095 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3096 friend class ASTContext; // ASTContext creates these. 3097public: 3098 /// getDecl - Get the declaration of this interface. 3099 ObjCInterfaceDecl *getDecl() const { return Decl; } 3100 3101 bool isSugared() const { return false; } 3102 QualType desugar() const { return QualType(this, 0); } 3103 3104 static bool classof(const Type *T) { 3105 return T->getTypeClass() == ObjCInterface; 3106 } 3107 static bool classof(const ObjCInterfaceType *) { return true; } 3108 3109 // Nonsense to "hide" certain members of ObjCObjectType within this 3110 // class. People asking for protocols on an ObjCInterfaceType are 3111 // not going to get what they want: ObjCInterfaceTypes are 3112 // guaranteed to have no protocols. 3113 enum { 3114 qual_iterator, 3115 qual_begin, 3116 qual_end, 3117 getNumProtocols, 3118 getProtocol 3119 }; 3120}; 3121 3122inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3123 if (const ObjCInterfaceType *T = 3124 getBaseType()->getAs<ObjCInterfaceType>()) 3125 return T->getDecl(); 3126 return 0; 3127} 3128 3129/// ObjCObjectPointerType - Used to represent a pointer to an 3130/// Objective C object. These are constructed from pointer 3131/// declarators when the pointee type is an ObjCObjectType (or sugar 3132/// for one). In addition, the 'id' and 'Class' types are typedefs 3133/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3134/// are translated into these. 3135/// 3136/// Pointers to pointers to Objective C objects are still PointerTypes; 3137/// only the first level of pointer gets it own type implementation. 3138class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3139 QualType PointeeType; 3140 3141 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3142 : Type(ObjCObjectPointer, Canonical, false), 3143 PointeeType(Pointee) {} 3144 friend class ASTContext; // ASTContext creates these. 3145 3146protected: 3147 virtual Linkage getLinkageImpl() const; 3148 3149public: 3150 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3151 /// The result will always be an ObjCObjectType or sugar thereof. 3152 QualType getPointeeType() const { return PointeeType; } 3153 3154 /// getObjCObjectType - Gets the type pointed to by this ObjC 3155 /// pointer. This method always returns non-null. 3156 /// 3157 /// This method is equivalent to getPointeeType() except that 3158 /// it discards any typedefs (or other sugar) between this 3159 /// type and the "outermost" object type. So for: 3160 /// @class A; @protocol P; @protocol Q; 3161 /// typedef A<P> AP; 3162 /// typedef A A1; 3163 /// typedef A1<P> A1P; 3164 /// typedef A1P<Q> A1PQ; 3165 /// For 'A*', getObjectType() will return 'A'. 3166 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3167 /// For 'AP*', getObjectType() will return 'A<P>'. 3168 /// For 'A1*', getObjectType() will return 'A'. 3169 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3170 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3171 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3172 /// adding protocols to a protocol-qualified base discards the 3173 /// old qualifiers (for now). But if it didn't, getObjectType() 3174 /// would return 'A1P<Q>' (and we'd have to make iterating over 3175 /// qualifiers more complicated). 3176 const ObjCObjectType *getObjectType() const { 3177 return PointeeType->getAs<ObjCObjectType>(); 3178 } 3179 3180 /// getInterfaceType - If this pointer points to an Objective C 3181 /// @interface type, gets the type for that interface. Any protocol 3182 /// qualifiers on the interface are ignored. 3183 /// 3184 /// \return null if the base type for this pointer is 'id' or 'Class' 3185 const ObjCInterfaceType *getInterfaceType() const { 3186 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3187 } 3188 3189 /// getInterfaceDecl - If this pointer points to an Objective @interface 3190 /// type, gets the declaration for that interface. 3191 /// 3192 /// \return null if the base type for this pointer is 'id' or 'Class' 3193 ObjCInterfaceDecl *getInterfaceDecl() const { 3194 return getObjectType()->getInterface(); 3195 } 3196 3197 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3198 /// its object type is the primitive 'id' type with no protocols. 3199 bool isObjCIdType() const { 3200 return getObjectType()->isObjCUnqualifiedId(); 3201 } 3202 3203 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3204 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3205 bool isObjCClassType() const { 3206 return getObjectType()->isObjCUnqualifiedClass(); 3207 } 3208 3209 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3210 /// non-empty set of protocols. 3211 bool isObjCQualifiedIdType() const { 3212 return getObjectType()->isObjCQualifiedId(); 3213 } 3214 3215 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3216 /// some non-empty set of protocols. 3217 bool isObjCQualifiedClassType() const { 3218 return getObjectType()->isObjCQualifiedClass(); 3219 } 3220 3221 /// An iterator over the qualifiers on the object type. Provided 3222 /// for convenience. This will always iterate over the full set of 3223 /// protocols on a type, not just those provided directly. 3224 typedef ObjCObjectType::qual_iterator qual_iterator; 3225 3226 qual_iterator qual_begin() const { 3227 return getObjectType()->qual_begin(); 3228 } 3229 qual_iterator qual_end() const { 3230 return getObjectType()->qual_end(); 3231 } 3232 bool qual_empty() const { return getObjectType()->qual_empty(); } 3233 3234 /// getNumProtocols - Return the number of qualifying protocols on 3235 /// the object type. 3236 unsigned getNumProtocols() const { 3237 return getObjectType()->getNumProtocols(); 3238 } 3239 3240 /// \brief Retrieve a qualifying protocol by index on the object 3241 /// type. 3242 ObjCProtocolDecl *getProtocol(unsigned I) const { 3243 return getObjectType()->getProtocol(I); 3244 } 3245 3246 bool isSugared() const { return false; } 3247 QualType desugar() const { return QualType(this, 0); } 3248 3249 void Profile(llvm::FoldingSetNodeID &ID) { 3250 Profile(ID, getPointeeType()); 3251 } 3252 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3253 ID.AddPointer(T.getAsOpaquePtr()); 3254 } 3255 static bool classof(const Type *T) { 3256 return T->getTypeClass() == ObjCObjectPointer; 3257 } 3258 static bool classof(const ObjCObjectPointerType *) { return true; } 3259}; 3260 3261/// A qualifier set is used to build a set of qualifiers. 3262class QualifierCollector : public Qualifiers { 3263 ASTContext *Context; 3264 3265public: 3266 QualifierCollector(Qualifiers Qs = Qualifiers()) 3267 : Qualifiers(Qs), Context(0) {} 3268 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3269 : Qualifiers(Qs), Context(&Context) {} 3270 3271 void setContext(ASTContext &C) { Context = &C; } 3272 3273 /// Collect any qualifiers on the given type and return an 3274 /// unqualified type. 3275 const Type *strip(QualType QT) { 3276 addFastQualifiers(QT.getLocalFastQualifiers()); 3277 if (QT.hasLocalNonFastQualifiers()) { 3278 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3279 Context = &EQ->getContext(); 3280 addQualifiers(EQ->getQualifiers()); 3281 return EQ->getBaseType(); 3282 } 3283 return QT.getTypePtrUnsafe(); 3284 } 3285 3286 /// Apply the collected qualifiers to the given type. 3287 QualType apply(QualType QT) const; 3288 3289 /// Apply the collected qualifiers to the given type. 3290 QualType apply(const Type* T) const; 3291 3292}; 3293 3294 3295// Inline function definitions. 3296 3297inline bool QualType::isCanonical() const { 3298 const Type *T = getTypePtr(); 3299 if (hasLocalQualifiers()) 3300 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3301 return T->isCanonicalUnqualified(); 3302} 3303 3304inline bool QualType::isCanonicalAsParam() const { 3305 if (hasLocalQualifiers()) return false; 3306 3307 const Type *T = getTypePtr(); 3308 if ((*this)->isPointerType()) { 3309 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3310 if (isa<VariableArrayType>(BaseType)) { 3311 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3312 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3313 if (VAT->getSizeExpr()) 3314 T = BaseType.getTypePtr(); 3315 } 3316 } 3317 return T->isCanonicalUnqualified() && 3318 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3319} 3320 3321inline bool QualType::isConstQualified() const { 3322 return isLocalConstQualified() || 3323 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3324} 3325 3326inline bool QualType::isRestrictQualified() const { 3327 return isLocalRestrictQualified() || 3328 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3329} 3330 3331 3332inline bool QualType::isVolatileQualified() const { 3333 return isLocalVolatileQualified() || 3334 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3335} 3336 3337inline bool QualType::hasQualifiers() const { 3338 return hasLocalQualifiers() || 3339 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3340} 3341 3342inline Qualifiers QualType::getQualifiers() const { 3343 Qualifiers Quals = getLocalQualifiers(); 3344 Quals.addQualifiers( 3345 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3346 return Quals; 3347} 3348 3349inline unsigned QualType::getCVRQualifiers() const { 3350 return getLocalCVRQualifiers() | 3351 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3352} 3353 3354/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3355/// type, returns them. Otherwise, if this is an array type, recurses 3356/// on the element type until some qualifiers have been found or a non-array 3357/// type reached. 3358inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3359 if (unsigned Quals = getCVRQualifiers()) 3360 return Quals; 3361 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3362 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3363 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3364 return 0; 3365} 3366 3367inline void QualType::removeConst() { 3368 removeFastQualifiers(Qualifiers::Const); 3369} 3370 3371inline void QualType::removeRestrict() { 3372 removeFastQualifiers(Qualifiers::Restrict); 3373} 3374 3375inline void QualType::removeVolatile() { 3376 QualifierCollector Qc; 3377 const Type *Ty = Qc.strip(*this); 3378 if (Qc.hasVolatile()) { 3379 Qc.removeVolatile(); 3380 *this = Qc.apply(Ty); 3381 } 3382} 3383 3384inline void QualType::removeCVRQualifiers(unsigned Mask) { 3385 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3386 3387 // Fast path: we don't need to touch the slow qualifiers. 3388 if (!(Mask & ~Qualifiers::FastMask)) { 3389 removeFastQualifiers(Mask); 3390 return; 3391 } 3392 3393 QualifierCollector Qc; 3394 const Type *Ty = Qc.strip(*this); 3395 Qc.removeCVRQualifiers(Mask); 3396 *this = Qc.apply(Ty); 3397} 3398 3399/// getAddressSpace - Return the address space of this type. 3400inline unsigned QualType::getAddressSpace() const { 3401 if (hasLocalNonFastQualifiers()) { 3402 const ExtQuals *EQ = getExtQualsUnsafe(); 3403 if (EQ->hasAddressSpace()) 3404 return EQ->getAddressSpace(); 3405 } 3406 3407 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3408 if (CT.hasLocalNonFastQualifiers()) { 3409 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3410 if (EQ->hasAddressSpace()) 3411 return EQ->getAddressSpace(); 3412 } 3413 3414 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3415 return AT->getElementType().getAddressSpace(); 3416 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3417 return RT->getAddressSpace(); 3418 return 0; 3419} 3420 3421/// getObjCGCAttr - Return the gc attribute of this type. 3422inline Qualifiers::GC QualType::getObjCGCAttr() const { 3423 if (hasLocalNonFastQualifiers()) { 3424 const ExtQuals *EQ = getExtQualsUnsafe(); 3425 if (EQ->hasObjCGCAttr()) 3426 return EQ->getObjCGCAttr(); 3427 } 3428 3429 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3430 if (CT.hasLocalNonFastQualifiers()) { 3431 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3432 if (EQ->hasObjCGCAttr()) 3433 return EQ->getObjCGCAttr(); 3434 } 3435 3436 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3437 return AT->getElementType().getObjCGCAttr(); 3438 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3439 return PT->getPointeeType().getObjCGCAttr(); 3440 // We most look at all pointer types, not just pointer to interface types. 3441 if (const PointerType *PT = CT->getAs<PointerType>()) 3442 return PT->getPointeeType().getObjCGCAttr(); 3443 return Qualifiers::GCNone; 3444} 3445 3446inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3447 if (const PointerType *PT = t.getAs<PointerType>()) { 3448 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3449 return FT->getExtInfo(); 3450 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3451 return FT->getExtInfo(); 3452 3453 return FunctionType::ExtInfo(); 3454} 3455 3456inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3457 return getFunctionExtInfo(*t); 3458} 3459 3460/// \brief Determine whether this set of qualifiers is a superset of the given 3461/// set of qualifiers. 3462inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3463 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3464} 3465 3466/// isMoreQualifiedThan - Determine whether this type is more 3467/// qualified than the Other type. For example, "const volatile int" 3468/// is more qualified than "const int", "volatile int", and 3469/// "int". However, it is not more qualified than "const volatile 3470/// int". 3471inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3472 // FIXME: work on arbitrary qualifiers 3473 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3474 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3475 if (getAddressSpace() != Other.getAddressSpace()) 3476 return false; 3477 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3478} 3479 3480/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3481/// as qualified as the Other type. For example, "const volatile 3482/// int" is at least as qualified as "const int", "volatile int", 3483/// "int", and "const volatile int". 3484inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3485 // FIXME: work on arbitrary qualifiers 3486 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3487 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3488 if (getAddressSpace() != Other.getAddressSpace()) 3489 return false; 3490 return (MyQuals | OtherQuals) == MyQuals; 3491} 3492 3493/// getNonReferenceType - If Type is a reference type (e.g., const 3494/// int&), returns the type that the reference refers to ("const 3495/// int"). Otherwise, returns the type itself. This routine is used 3496/// throughout Sema to implement C++ 5p6: 3497/// 3498/// If an expression initially has the type "reference to T" (8.3.2, 3499/// 8.5.3), the type is adjusted to "T" prior to any further 3500/// analysis, the expression designates the object or function 3501/// denoted by the reference, and the expression is an lvalue. 3502inline QualType QualType::getNonReferenceType() const { 3503 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3504 return RefType->getPointeeType(); 3505 else 3506 return *this; 3507} 3508 3509inline bool Type::isFunctionType() const { 3510 return isa<FunctionType>(CanonicalType); 3511} 3512inline bool Type::isPointerType() const { 3513 return isa<PointerType>(CanonicalType); 3514} 3515inline bool Type::isAnyPointerType() const { 3516 return isPointerType() || isObjCObjectPointerType(); 3517} 3518inline bool Type::isBlockPointerType() const { 3519 return isa<BlockPointerType>(CanonicalType); 3520} 3521inline bool Type::isReferenceType() const { 3522 return isa<ReferenceType>(CanonicalType); 3523} 3524inline bool Type::isLValueReferenceType() const { 3525 return isa<LValueReferenceType>(CanonicalType); 3526} 3527inline bool Type::isRValueReferenceType() const { 3528 return isa<RValueReferenceType>(CanonicalType); 3529} 3530inline bool Type::isFunctionPointerType() const { 3531 if (const PointerType* T = getAs<PointerType>()) 3532 return T->getPointeeType()->isFunctionType(); 3533 else 3534 return false; 3535} 3536inline bool Type::isMemberPointerType() const { 3537 return isa<MemberPointerType>(CanonicalType); 3538} 3539inline bool Type::isMemberFunctionPointerType() const { 3540 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3541 return T->isMemberFunctionPointer(); 3542 else 3543 return false; 3544} 3545inline bool Type::isMemberDataPointerType() const { 3546 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3547 return T->isMemberDataPointer(); 3548 else 3549 return false; 3550} 3551inline bool Type::isArrayType() const { 3552 return isa<ArrayType>(CanonicalType); 3553} 3554inline bool Type::isConstantArrayType() const { 3555 return isa<ConstantArrayType>(CanonicalType); 3556} 3557inline bool Type::isIncompleteArrayType() const { 3558 return isa<IncompleteArrayType>(CanonicalType); 3559} 3560inline bool Type::isVariableArrayType() const { 3561 return isa<VariableArrayType>(CanonicalType); 3562} 3563inline bool Type::isDependentSizedArrayType() const { 3564 return isa<DependentSizedArrayType>(CanonicalType); 3565} 3566inline bool Type::isBuiltinType() const { 3567 return isa<BuiltinType>(CanonicalType); 3568} 3569inline bool Type::isRecordType() const { 3570 return isa<RecordType>(CanonicalType); 3571} 3572inline bool Type::isEnumeralType() const { 3573 return isa<EnumType>(CanonicalType); 3574} 3575inline bool Type::isAnyComplexType() const { 3576 return isa<ComplexType>(CanonicalType); 3577} 3578inline bool Type::isVectorType() const { 3579 return isa<VectorType>(CanonicalType); 3580} 3581inline bool Type::isExtVectorType() const { 3582 return isa<ExtVectorType>(CanonicalType); 3583} 3584inline bool Type::isObjCObjectPointerType() const { 3585 return isa<ObjCObjectPointerType>(CanonicalType); 3586} 3587inline bool Type::isObjCObjectType() const { 3588 return isa<ObjCObjectType>(CanonicalType); 3589} 3590inline bool Type::isObjCObjectOrInterfaceType() const { 3591 return isa<ObjCInterfaceType>(CanonicalType) || 3592 isa<ObjCObjectType>(CanonicalType); 3593} 3594 3595inline bool Type::isObjCQualifiedIdType() const { 3596 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3597 return OPT->isObjCQualifiedIdType(); 3598 return false; 3599} 3600inline bool Type::isObjCQualifiedClassType() const { 3601 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3602 return OPT->isObjCQualifiedClassType(); 3603 return false; 3604} 3605inline bool Type::isObjCIdType() const { 3606 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3607 return OPT->isObjCIdType(); 3608 return false; 3609} 3610inline bool Type::isObjCClassType() const { 3611 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3612 return OPT->isObjCClassType(); 3613 return false; 3614} 3615inline bool Type::isObjCSelType() const { 3616 if (const PointerType *OPT = getAs<PointerType>()) 3617 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3618 return false; 3619} 3620inline bool Type::isObjCBuiltinType() const { 3621 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3622} 3623inline bool Type::isTemplateTypeParmType() const { 3624 return isa<TemplateTypeParmType>(CanonicalType); 3625} 3626 3627inline bool Type::isSpecificBuiltinType(unsigned K) const { 3628 if (const BuiltinType *BT = getAs<BuiltinType>()) 3629 if (BT->getKind() == (BuiltinType::Kind) K) 3630 return true; 3631 return false; 3632} 3633 3634inline bool Type::isPlaceholderType() const { 3635 if (const BuiltinType *BT = getAs<BuiltinType>()) 3636 return BT->isPlaceholderType(); 3637 return false; 3638} 3639 3640/// \brief Determines whether this is a type for which one can define 3641/// an overloaded operator. 3642inline bool Type::isOverloadableType() const { 3643 return isDependentType() || isRecordType() || isEnumeralType(); 3644} 3645 3646inline bool Type::hasPointerRepresentation() const { 3647 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3648 isObjCObjectPointerType() || isNullPtrType()); 3649} 3650 3651inline bool Type::hasObjCPointerRepresentation() const { 3652 return isObjCObjectPointerType(); 3653} 3654 3655/// Insertion operator for diagnostics. This allows sending QualType's into a 3656/// diagnostic with <<. 3657inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3658 QualType T) { 3659 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3660 Diagnostic::ak_qualtype); 3661 return DB; 3662} 3663 3664/// Insertion operator for partial diagnostics. This allows sending QualType's 3665/// into a diagnostic with <<. 3666inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3667 QualType T) { 3668 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3669 Diagnostic::ak_qualtype); 3670 return PD; 3671} 3672 3673// Helper class template that is used by Type::getAs to ensure that one does 3674// not try to look through a qualified type to get to an array type. 3675template<typename T, 3676 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3677 llvm::is_base_of<ArrayType, T>::value)> 3678struct ArrayType_cannot_be_used_with_getAs { }; 3679 3680template<typename T> 3681struct ArrayType_cannot_be_used_with_getAs<T, true>; 3682 3683/// Member-template getAs<specific type>'. 3684template <typename T> const T *Type::getAs() const { 3685 ArrayType_cannot_be_used_with_getAs<T> at; 3686 (void)at; 3687 3688 // If this is directly a T type, return it. 3689 if (const T *Ty = dyn_cast<T>(this)) 3690 return Ty; 3691 3692 // If the canonical form of this type isn't the right kind, reject it. 3693 if (!isa<T>(CanonicalType)) 3694 return 0; 3695 3696 // If this is a typedef for the type, strip the typedef off without 3697 // losing all typedef information. 3698 return cast<T>(getUnqualifiedDesugaredType()); 3699} 3700 3701} // end namespace clang 3702 3703#endif 3704