Type.h revision ca34b8f06d560b4f604934d57b2ad311c4228e32
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/Basic/Visibility.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/TemplateName.h" 24#include "llvm/Support/Casting.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/ADT/APSInt.h" 27#include "llvm/ADT/FoldingSet.h" 28#include "llvm/ADT/PointerIntPair.h" 29#include "llvm/ADT/PointerUnion.h" 30 31using llvm::isa; 32using llvm::cast; 33using llvm::cast_or_null; 34using llvm::dyn_cast; 35using llvm::dyn_cast_or_null; 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 3, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class ObjCInterfaceDecl; 85 class ObjCProtocolDecl; 86 class ObjCMethodDecl; 87 class UnresolvedUsingTypenameDecl; 88 class Expr; 89 class Stmt; 90 class SourceLocation; 91 class StmtIteratorBase; 92 class TemplateArgument; 93 class TemplateArgumentLoc; 94 class TemplateArgumentListInfo; 95 class Type; 96 class ElaboratedType; 97 struct PrintingPolicy; 98 99 template <typename> class CanQual; 100 typedef CanQual<Type> CanQualType; 101 102 // Provide forward declarations for all of the *Type classes 103#define TYPE(Class, Base) class Class##Type; 104#include "clang/AST/TypeNodes.def" 105 106/// Qualifiers - The collection of all-type qualifiers we support. 107/// Clang supports five independent qualifiers: 108/// * C99: const, volatile, and restrict 109/// * Embedded C (TR18037): address spaces 110/// * Objective C: the GC attributes (none, weak, or strong) 111class Qualifiers { 112public: 113 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 114 Const = 0x1, 115 Restrict = 0x2, 116 Volatile = 0x4, 117 CVRMask = Const | Volatile | Restrict 118 }; 119 120 enum GC { 121 GCNone = 0, 122 Weak, 123 Strong 124 }; 125 126 enum { 127 /// The maximum supported address space number. 128 /// 24 bits should be enough for anyone. 129 MaxAddressSpace = 0xffffffu, 130 131 /// The width of the "fast" qualifier mask. 132 FastWidth = 2, 133 134 /// The fast qualifier mask. 135 FastMask = (1 << FastWidth) - 1 136 }; 137 138 Qualifiers() : Mask(0) {} 139 140 static Qualifiers fromFastMask(unsigned Mask) { 141 Qualifiers Qs; 142 Qs.addFastQualifiers(Mask); 143 return Qs; 144 } 145 146 static Qualifiers fromCVRMask(unsigned CVR) { 147 Qualifiers Qs; 148 Qs.addCVRQualifiers(CVR); 149 return Qs; 150 } 151 152 // Deserialize qualifiers from an opaque representation. 153 static Qualifiers fromOpaqueValue(unsigned opaque) { 154 Qualifiers Qs; 155 Qs.Mask = opaque; 156 return Qs; 157 } 158 159 // Serialize these qualifiers into an opaque representation. 160 unsigned getAsOpaqueValue() const { 161 return Mask; 162 } 163 164 bool hasConst() const { return Mask & Const; } 165 void setConst(bool flag) { 166 Mask = (Mask & ~Const) | (flag ? Const : 0); 167 } 168 void removeConst() { Mask &= ~Const; } 169 void addConst() { Mask |= Const; } 170 171 bool hasVolatile() const { return Mask & Volatile; } 172 void setVolatile(bool flag) { 173 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 174 } 175 void removeVolatile() { Mask &= ~Volatile; } 176 void addVolatile() { Mask |= Volatile; } 177 178 bool hasRestrict() const { return Mask & Restrict; } 179 void setRestrict(bool flag) { 180 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 181 } 182 void removeRestrict() { Mask &= ~Restrict; } 183 void addRestrict() { Mask |= Restrict; } 184 185 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 186 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 187 void setCVRQualifiers(unsigned mask) { 188 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 189 Mask = (Mask & ~CVRMask) | mask; 190 } 191 void removeCVRQualifiers(unsigned mask) { 192 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 193 Mask &= ~mask; 194 } 195 void removeCVRQualifiers() { 196 removeCVRQualifiers(CVRMask); 197 } 198 void addCVRQualifiers(unsigned mask) { 199 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 200 Mask |= mask; 201 } 202 203 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 204 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 205 void setObjCGCAttr(GC type) { 206 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 207 } 208 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 209 void addObjCGCAttr(GC type) { 210 assert(type); 211 setObjCGCAttr(type); 212 } 213 214 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 215 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 216 void setAddressSpace(unsigned space) { 217 assert(space <= MaxAddressSpace); 218 Mask = (Mask & ~AddressSpaceMask) 219 | (((uint32_t) space) << AddressSpaceShift); 220 } 221 void removeAddressSpace() { setAddressSpace(0); } 222 void addAddressSpace(unsigned space) { 223 assert(space); 224 setAddressSpace(space); 225 } 226 227 // Fast qualifiers are those that can be allocated directly 228 // on a QualType object. 229 bool hasFastQualifiers() const { return getFastQualifiers(); } 230 unsigned getFastQualifiers() const { return Mask & FastMask; } 231 void setFastQualifiers(unsigned mask) { 232 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 233 Mask = (Mask & ~FastMask) | mask; 234 } 235 void removeFastQualifiers(unsigned mask) { 236 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 237 Mask &= ~mask; 238 } 239 void removeFastQualifiers() { 240 removeFastQualifiers(FastMask); 241 } 242 void addFastQualifiers(unsigned mask) { 243 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 244 Mask |= mask; 245 } 246 247 /// hasNonFastQualifiers - Return true if the set contains any 248 /// qualifiers which require an ExtQuals node to be allocated. 249 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 250 Qualifiers getNonFastQualifiers() const { 251 Qualifiers Quals = *this; 252 Quals.setFastQualifiers(0); 253 return Quals; 254 } 255 256 /// hasQualifiers - Return true if the set contains any qualifiers. 257 bool hasQualifiers() const { return Mask; } 258 bool empty() const { return !Mask; } 259 260 /// \brief Add the qualifiers from the given set to this set. 261 void addQualifiers(Qualifiers Q) { 262 // If the other set doesn't have any non-boolean qualifiers, just 263 // bit-or it in. 264 if (!(Q.Mask & ~CVRMask)) 265 Mask |= Q.Mask; 266 else { 267 Mask |= (Q.Mask & CVRMask); 268 if (Q.hasAddressSpace()) 269 addAddressSpace(Q.getAddressSpace()); 270 if (Q.hasObjCGCAttr()) 271 addObjCGCAttr(Q.getObjCGCAttr()); 272 } 273 } 274 275 bool isSupersetOf(Qualifiers Other) const; 276 277 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 278 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 279 280 operator bool() const { return hasQualifiers(); } 281 282 Qualifiers &operator+=(Qualifiers R) { 283 addQualifiers(R); 284 return *this; 285 } 286 287 // Union two qualifier sets. If an enumerated qualifier appears 288 // in both sets, use the one from the right. 289 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 290 L += R; 291 return L; 292 } 293 294 Qualifiers &operator-=(Qualifiers R) { 295 Mask = Mask & ~(R.Mask); 296 return *this; 297 } 298 299 /// \brief Compute the difference between two qualifier sets. 300 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 301 L -= R; 302 return L; 303 } 304 305 std::string getAsString() const; 306 std::string getAsString(const PrintingPolicy &Policy) const { 307 std::string Buffer; 308 getAsStringInternal(Buffer, Policy); 309 return Buffer; 310 } 311 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 312 313 void Profile(llvm::FoldingSetNodeID &ID) const { 314 ID.AddInteger(Mask); 315 } 316 317private: 318 319 // bits: |0 1 2|3 .. 4|5 .. 31| 320 // |C R V|GCAttr|AddrSpace| 321 uint32_t Mask; 322 323 static const uint32_t GCAttrMask = 0x18; 324 static const uint32_t GCAttrShift = 3; 325 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 326 static const uint32_t AddressSpaceShift = 5; 327}; 328 329 330/// ExtQuals - We can encode up to three bits in the low bits of a 331/// type pointer, but there are many more type qualifiers that we want 332/// to be able to apply to an arbitrary type. Therefore we have this 333/// struct, intended to be heap-allocated and used by QualType to 334/// store qualifiers. 335/// 336/// The current design tags the 'const' and 'restrict' qualifiers in 337/// two low bits on the QualType pointer; a third bit records whether 338/// the pointer is an ExtQuals node. 'const' was chosen because it is 339/// orders of magnitude more common than the other two qualifiers, in 340/// both library and user code. It's relatively rare to see 341/// 'restrict' in user code, but many standard C headers are saturated 342/// with 'restrict' declarations, so that representing them efficiently 343/// is a critical goal of this representation. 344class ExtQuals : public llvm::FoldingSetNode { 345 // NOTE: changing the fast qualifiers should be straightforward as 346 // long as you don't make 'const' non-fast. 347 // 1. Qualifiers: 348 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 349 // Fast qualifiers must occupy the low-order bits. 350 // b) Update Qualifiers::FastWidth and FastMask. 351 // 2. QualType: 352 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 353 // b) Update remove{Volatile,Restrict}, defined near the end of 354 // this header. 355 // 3. ASTContext: 356 // a) Update get{Volatile,Restrict}Type. 357 358 /// Context - the context to which this set belongs. We save this 359 /// here so that QualifierCollector can use it to reapply extended 360 /// qualifiers to an arbitrary type without requiring a context to 361 /// be pushed through every single API dealing with qualifiers. 362 ASTContext& Context; 363 364 /// BaseType - the underlying type that this qualifies 365 const Type *BaseType; 366 367 /// Quals - the immutable set of qualifiers applied by this 368 /// node; always contains extended qualifiers. 369 Qualifiers Quals; 370 371public: 372 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 373 : Context(Context), BaseType(Base), Quals(Quals) 374 { 375 assert(Quals.hasNonFastQualifiers() 376 && "ExtQuals created with no fast qualifiers"); 377 assert(!Quals.hasFastQualifiers() 378 && "ExtQuals created with fast qualifiers"); 379 } 380 381 Qualifiers getQualifiers() const { return Quals; } 382 383 bool hasVolatile() const { return Quals.hasVolatile(); } 384 385 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 386 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 387 388 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 389 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 390 391 const Type *getBaseType() const { return BaseType; } 392 393 ASTContext &getContext() const { return Context; } 394 395public: 396 void Profile(llvm::FoldingSetNodeID &ID) const { 397 Profile(ID, getBaseType(), Quals); 398 } 399 static void Profile(llvm::FoldingSetNodeID &ID, 400 const Type *BaseType, 401 Qualifiers Quals) { 402 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 403 ID.AddPointer(BaseType); 404 Quals.Profile(ID); 405 } 406}; 407 408/// CallingConv - Specifies the calling convention that a function uses. 409enum CallingConv { 410 CC_Default, 411 CC_C, // __attribute__((cdecl)) 412 CC_X86StdCall, // __attribute__((stdcall)) 413 CC_X86FastCall, // __attribute__((fastcall)) 414 CC_X86ThisCall, // __attribute__((thiscall)) 415 CC_X86Pascal // __attribute__((pascal)) 416}; 417 418 419/// QualType - For efficiency, we don't store CV-qualified types as nodes on 420/// their own: instead each reference to a type stores the qualifiers. This 421/// greatly reduces the number of nodes we need to allocate for types (for 422/// example we only need one for 'int', 'const int', 'volatile int', 423/// 'const volatile int', etc). 424/// 425/// As an added efficiency bonus, instead of making this a pair, we 426/// just store the two bits we care about in the low bits of the 427/// pointer. To handle the packing/unpacking, we make QualType be a 428/// simple wrapper class that acts like a smart pointer. A third bit 429/// indicates whether there are extended qualifiers present, in which 430/// case the pointer points to a special structure. 431class QualType { 432 // Thankfully, these are efficiently composable. 433 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 434 Qualifiers::FastWidth> Value; 435 436 const ExtQuals *getExtQualsUnsafe() const { 437 return Value.getPointer().get<const ExtQuals*>(); 438 } 439 440 const Type *getTypePtrUnsafe() const { 441 return Value.getPointer().get<const Type*>(); 442 } 443 444 QualType getUnqualifiedTypeSlow() const; 445 446 friend class QualifierCollector; 447public: 448 QualType() {} 449 450 QualType(const Type *Ptr, unsigned Quals) 451 : Value(Ptr, Quals) {} 452 QualType(const ExtQuals *Ptr, unsigned Quals) 453 : Value(Ptr, Quals) {} 454 455 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 456 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 457 458 /// Retrieves a pointer to the underlying (unqualified) type. 459 /// This should really return a const Type, but it's not worth 460 /// changing all the users right now. 461 Type *getTypePtr() const { 462 if (hasLocalNonFastQualifiers()) 463 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 464 return const_cast<Type*>(getTypePtrUnsafe()); 465 } 466 467 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 468 static QualType getFromOpaquePtr(void *Ptr) { 469 QualType T; 470 T.Value.setFromOpaqueValue(Ptr); 471 return T; 472 } 473 474 Type &operator*() const { 475 return *getTypePtr(); 476 } 477 478 Type *operator->() const { 479 return getTypePtr(); 480 } 481 482 bool isCanonical() const; 483 bool isCanonicalAsParam() const; 484 485 /// isNull - Return true if this QualType doesn't point to a type yet. 486 bool isNull() const { 487 return Value.getPointer().isNull(); 488 } 489 490 /// \brief Determine whether this particular QualType instance has the 491 /// "const" qualifier set, without looking through typedefs that may have 492 /// added "const" at a different level. 493 bool isLocalConstQualified() const { 494 return (getLocalFastQualifiers() & Qualifiers::Const); 495 } 496 497 /// \brief Determine whether this type is const-qualified. 498 bool isConstQualified() const; 499 500 /// \brief Determine whether this particular QualType instance has the 501 /// "restrict" qualifier set, without looking through typedefs that may have 502 /// added "restrict" at a different level. 503 bool isLocalRestrictQualified() const { 504 return (getLocalFastQualifiers() & Qualifiers::Restrict); 505 } 506 507 /// \brief Determine whether this type is restrict-qualified. 508 bool isRestrictQualified() const; 509 510 /// \brief Determine whether this particular QualType instance has the 511 /// "volatile" qualifier set, without looking through typedefs that may have 512 /// added "volatile" at a different level. 513 bool isLocalVolatileQualified() const { 514 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 515 } 516 517 /// \brief Determine whether this type is volatile-qualified. 518 bool isVolatileQualified() const; 519 520 /// \brief Determine whether this particular QualType instance has any 521 /// qualifiers, without looking through any typedefs that might add 522 /// qualifiers at a different level. 523 bool hasLocalQualifiers() const { 524 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 525 } 526 527 /// \brief Determine whether this type has any qualifiers. 528 bool hasQualifiers() const; 529 530 /// \brief Determine whether this particular QualType instance has any 531 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 532 /// instance. 533 bool hasLocalNonFastQualifiers() const { 534 return Value.getPointer().is<const ExtQuals*>(); 535 } 536 537 /// \brief Retrieve the set of qualifiers local to this particular QualType 538 /// instance, not including any qualifiers acquired through typedefs or 539 /// other sugar. 540 Qualifiers getLocalQualifiers() const { 541 Qualifiers Quals; 542 if (hasLocalNonFastQualifiers()) 543 Quals = getExtQualsUnsafe()->getQualifiers(); 544 Quals.addFastQualifiers(getLocalFastQualifiers()); 545 return Quals; 546 } 547 548 /// \brief Retrieve the set of qualifiers applied to this type. 549 Qualifiers getQualifiers() const; 550 551 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 552 /// local to this particular QualType instance, not including any qualifiers 553 /// acquired through typedefs or other sugar. 554 unsigned getLocalCVRQualifiers() const { 555 unsigned CVR = getLocalFastQualifiers(); 556 if (isLocalVolatileQualified()) 557 CVR |= Qualifiers::Volatile; 558 return CVR; 559 } 560 561 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 562 /// applied to this type. 563 unsigned getCVRQualifiers() const; 564 565 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 566 /// applied to this type, looking through any number of unqualified array 567 /// types to their element types' qualifiers. 568 unsigned getCVRQualifiersThroughArrayTypes() const; 569 570 bool isConstant(ASTContext& Ctx) const { 571 return QualType::isConstant(*this, Ctx); 572 } 573 574 // Don't promise in the API that anything besides 'const' can be 575 // easily added. 576 577 /// addConst - add the specified type qualifier to this QualType. 578 void addConst() { 579 addFastQualifiers(Qualifiers::Const); 580 } 581 QualType withConst() const { 582 return withFastQualifiers(Qualifiers::Const); 583 } 584 585 void addFastQualifiers(unsigned TQs) { 586 assert(!(TQs & ~Qualifiers::FastMask) 587 && "non-fast qualifier bits set in mask!"); 588 Value.setInt(Value.getInt() | TQs); 589 } 590 591 // FIXME: The remove* functions are semantically broken, because they might 592 // not remove a qualifier stored on a typedef. Most of the with* functions 593 // have the same problem. 594 void removeConst(); 595 void removeVolatile(); 596 void removeRestrict(); 597 void removeCVRQualifiers(unsigned Mask); 598 599 void removeFastQualifiers() { Value.setInt(0); } 600 void removeFastQualifiers(unsigned Mask) { 601 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 602 Value.setInt(Value.getInt() & ~Mask); 603 } 604 605 // Creates a type with the given qualifiers in addition to any 606 // qualifiers already on this type. 607 QualType withFastQualifiers(unsigned TQs) const { 608 QualType T = *this; 609 T.addFastQualifiers(TQs); 610 return T; 611 } 612 613 // Creates a type with exactly the given fast qualifiers, removing 614 // any existing fast qualifiers. 615 QualType withExactFastQualifiers(unsigned TQs) const { 616 return withoutFastQualifiers().withFastQualifiers(TQs); 617 } 618 619 // Removes fast qualifiers, but leaves any extended qualifiers in place. 620 QualType withoutFastQualifiers() const { 621 QualType T = *this; 622 T.removeFastQualifiers(); 623 return T; 624 } 625 626 /// \brief Return this type with all of the instance-specific qualifiers 627 /// removed, but without removing any qualifiers that may have been applied 628 /// through typedefs. 629 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 630 631 /// \brief Return the unqualified form of the given type, which might be 632 /// desugared to eliminate qualifiers introduced via typedefs. 633 QualType getUnqualifiedType() const { 634 QualType T = getLocalUnqualifiedType(); 635 if (!T.hasQualifiers()) 636 return T; 637 638 return getUnqualifiedTypeSlow(); 639 } 640 641 bool isMoreQualifiedThan(QualType Other) const; 642 bool isAtLeastAsQualifiedAs(QualType Other) const; 643 QualType getNonReferenceType() const; 644 645 /// \brief Determine the type of a (typically non-lvalue) expression with the 646 /// specified result type. 647 /// 648 /// This routine should be used for expressions for which the return type is 649 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 650 /// an lvalue. It removes a top-level reference (since there are no 651 /// expressions of reference type) and deletes top-level cvr-qualifiers 652 /// from non-class types (in C++) or all types (in C). 653 QualType getNonLValueExprType(ASTContext &Context) const; 654 655 /// getDesugaredType - Return the specified type with any "sugar" removed from 656 /// the type. This takes off typedefs, typeof's etc. If the outer level of 657 /// the type is already concrete, it returns it unmodified. This is similar 658 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 659 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 660 /// concrete. 661 /// 662 /// Qualifiers are left in place. 663 QualType getDesugaredType() const { 664 return QualType::getDesugaredType(*this); 665 } 666 667 /// operator==/!= - Indicate whether the specified types and qualifiers are 668 /// identical. 669 friend bool operator==(const QualType &LHS, const QualType &RHS) { 670 return LHS.Value == RHS.Value; 671 } 672 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 673 return LHS.Value != RHS.Value; 674 } 675 std::string getAsString() const; 676 677 std::string getAsString(const PrintingPolicy &Policy) const { 678 std::string S; 679 getAsStringInternal(S, Policy); 680 return S; 681 } 682 void getAsStringInternal(std::string &Str, 683 const PrintingPolicy &Policy) const; 684 685 void dump(const char *s) const; 686 void dump() const; 687 688 void Profile(llvm::FoldingSetNodeID &ID) const { 689 ID.AddPointer(getAsOpaquePtr()); 690 } 691 692 /// getAddressSpace - Return the address space of this type. 693 inline unsigned getAddressSpace() const; 694 695 /// GCAttrTypesAttr - Returns gc attribute of this type. 696 inline Qualifiers::GC getObjCGCAttr() const; 697 698 /// isObjCGCWeak true when Type is objc's weak. 699 bool isObjCGCWeak() const { 700 return getObjCGCAttr() == Qualifiers::Weak; 701 } 702 703 /// isObjCGCStrong true when Type is objc's strong. 704 bool isObjCGCStrong() const { 705 return getObjCGCAttr() == Qualifiers::Strong; 706 } 707 708private: 709 // These methods are implemented in a separate translation unit; 710 // "static"-ize them to avoid creating temporary QualTypes in the 711 // caller. 712 static bool isConstant(QualType T, ASTContext& Ctx); 713 static QualType getDesugaredType(QualType T); 714}; 715 716} // end clang. 717 718namespace llvm { 719/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 720/// to a specific Type class. 721template<> struct simplify_type<const ::clang::QualType> { 722 typedef ::clang::Type* SimpleType; 723 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 724 return Val.getTypePtr(); 725 } 726}; 727template<> struct simplify_type< ::clang::QualType> 728 : public simplify_type<const ::clang::QualType> {}; 729 730// Teach SmallPtrSet that QualType is "basically a pointer". 731template<> 732class PointerLikeTypeTraits<clang::QualType> { 733public: 734 static inline void *getAsVoidPointer(clang::QualType P) { 735 return P.getAsOpaquePtr(); 736 } 737 static inline clang::QualType getFromVoidPointer(void *P) { 738 return clang::QualType::getFromOpaquePtr(P); 739 } 740 // Various qualifiers go in low bits. 741 enum { NumLowBitsAvailable = 0 }; 742}; 743 744} // end namespace llvm 745 746namespace clang { 747 748/// Type - This is the base class of the type hierarchy. A central concept 749/// with types is that each type always has a canonical type. A canonical type 750/// is the type with any typedef names stripped out of it or the types it 751/// references. For example, consider: 752/// 753/// typedef int foo; 754/// typedef foo* bar; 755/// 'int *' 'foo *' 'bar' 756/// 757/// There will be a Type object created for 'int'. Since int is canonical, its 758/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 759/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 760/// there is a PointerType that represents 'int*', which, like 'int', is 761/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 762/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 763/// is also 'int*'. 764/// 765/// Non-canonical types are useful for emitting diagnostics, without losing 766/// information about typedefs being used. Canonical types are useful for type 767/// comparisons (they allow by-pointer equality tests) and useful for reasoning 768/// about whether something has a particular form (e.g. is a function type), 769/// because they implicitly, recursively, strip all typedefs out of a type. 770/// 771/// Types, once created, are immutable. 772/// 773class Type { 774public: 775 enum TypeClass { 776#define TYPE(Class, Base) Class, 777#define LAST_TYPE(Class) TypeLast = Class, 778#define ABSTRACT_TYPE(Class, Base) 779#include "clang/AST/TypeNodes.def" 780 TagFirst = Record, TagLast = Enum 781 }; 782 783private: 784 Type(const Type&); // DO NOT IMPLEMENT. 785 void operator=(const Type&); // DO NOT IMPLEMENT. 786 787 QualType CanonicalType; 788 789 /// Bitfields required by the Type class. 790 class TypeBitfields { 791 friend class Type; 792 793 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 794 unsigned TC : 8; 795 796 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 797 /// Note that this should stay at the end of the ivars for Type so that 798 /// subclasses can pack their bitfields into the same word. 799 unsigned Dependent : 1; 800 801 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 802 unsigned VariablyModified : 1; 803 804 /// \brief Nonzero if the cache (i.e. the bitfields here starting 805 /// with 'Cache') is valid. If so, then this is a 806 /// LangOptions::VisibilityMode+1. 807 mutable unsigned CacheValidAndVisibility : 2; 808 809 /// \brief Linkage of this type. 810 mutable unsigned CachedLinkage : 2; 811 812 /// \brief Whether this type involves and local or unnamed types. 813 mutable unsigned CachedLocalOrUnnamed : 1; 814 815 /// \brief FromAST - Whether this type comes from an AST file. 816 mutable unsigned FromAST : 1; 817 818 bool isCacheValid() const { 819 return (CacheValidAndVisibility != 0); 820 } 821 Visibility getVisibility() const { 822 assert(isCacheValid() && "getting linkage from invalid cache"); 823 return static_cast<Visibility>(CacheValidAndVisibility-1); 824 } 825 Linkage getLinkage() const { 826 assert(isCacheValid() && "getting linkage from invalid cache"); 827 return static_cast<Linkage>(CachedLinkage); 828 } 829 bool hasLocalOrUnnamedType() const { 830 assert(isCacheValid() && "getting linkage from invalid cache"); 831 return CachedLocalOrUnnamed; 832 } 833 }; 834 enum { NumTypeBits = 16 }; 835 836protected: 837 // These classes allow subclasses to somewhat cleanly pack bitfields 838 // into Type. 839 840 class ArrayTypeBitfields { 841 friend class ArrayType; 842 843 unsigned : NumTypeBits; 844 845 /// IndexTypeQuals - CVR qualifiers from declarations like 846 /// 'int X[static restrict 4]'. For function parameters only. 847 unsigned IndexTypeQuals : 3; 848 849 /// SizeModifier - storage class qualifiers from declarations like 850 /// 'int X[static restrict 4]'. For function parameters only. 851 /// Actually an ArrayType::ArraySizeModifier. 852 unsigned SizeModifier : 3; 853 }; 854 855 class BuiltinTypeBitfields { 856 friend class BuiltinType; 857 858 unsigned : NumTypeBits; 859 860 /// The kind (BuiltinType::Kind) of builtin type this is. 861 unsigned Kind : 8; 862 }; 863 864 class FunctionTypeBitfields { 865 friend class FunctionType; 866 867 unsigned : NumTypeBits; 868 869 /// Extra information which affects how the function is called, like 870 /// regparm and the calling convention. 871 unsigned ExtInfo : 8; 872 873 /// A bit to be used by the subclass. 874 unsigned SubclassInfo : 1; 875 876 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 877 /// other bitfields. 878 /// The qualifiers are part of FunctionProtoType because... 879 /// 880 /// C++ 8.3.5p4: The return type, the parameter type list and the 881 /// cv-qualifier-seq, [...], are part of the function type. 882 unsigned TypeQuals : 3; 883 }; 884 885 class ObjCObjectTypeBitfields { 886 friend class ObjCObjectType; 887 888 unsigned : NumTypeBits; 889 890 /// NumProtocols - The number of protocols stored directly on this 891 /// object type. 892 unsigned NumProtocols : 32 - NumTypeBits; 893 }; 894 895 class ReferenceTypeBitfields { 896 friend class ReferenceType; 897 898 unsigned : NumTypeBits; 899 900 /// True if the type was originally spelled with an lvalue sigil. 901 /// This is never true of rvalue references but can also be false 902 /// on lvalue references because of C++0x [dcl.typedef]p9, 903 /// as follows: 904 /// 905 /// typedef int &ref; // lvalue, spelled lvalue 906 /// typedef int &&rvref; // rvalue 907 /// ref &a; // lvalue, inner ref, spelled lvalue 908 /// ref &&a; // lvalue, inner ref 909 /// rvref &a; // lvalue, inner ref, spelled lvalue 910 /// rvref &&a; // rvalue, inner ref 911 unsigned SpelledAsLValue : 1; 912 913 /// True if the inner type is a reference type. This only happens 914 /// in non-canonical forms. 915 unsigned InnerRef : 1; 916 }; 917 918 class TypeWithKeywordBitfields { 919 friend class TypeWithKeyword; 920 921 unsigned : NumTypeBits; 922 923 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 924 unsigned Keyword : 8; 925 }; 926 927 class VectorTypeBitfields { 928 friend class VectorType; 929 930 unsigned : NumTypeBits; 931 932 /// VecKind - The kind of vector, either a generic vector type or some 933 /// target-specific vector type such as for AltiVec or Neon. 934 unsigned VecKind : 3; 935 936 /// NumElements - The number of elements in the vector. 937 unsigned NumElements : 29 - NumTypeBits; 938 }; 939 940 union { 941 TypeBitfields TypeBits; 942 ArrayTypeBitfields ArrayTypeBits; 943 BuiltinTypeBitfields BuiltinTypeBits; 944 FunctionTypeBitfields FunctionTypeBits; 945 ObjCObjectTypeBitfields ObjCObjectTypeBits; 946 ReferenceTypeBitfields ReferenceTypeBits; 947 TypeWithKeywordBitfields TypeWithKeywordBits; 948 VectorTypeBitfields VectorTypeBits; 949 }; 950 951private: 952 /// \brief Set whether this type comes from an AST file. 953 void setFromAST(bool V = true) const { 954 TypeBits.FromAST = V; 955 } 956 957 void ensureCachedProperties() const; 958 959protected: 960 /// \brief Compute the cached properties of this type. 961 class CachedProperties { 962 char linkage; 963 char visibility; 964 bool local; 965 966 public: 967 CachedProperties(Linkage linkage, Visibility visibility, bool local) 968 : linkage(linkage), visibility(visibility), local(local) {} 969 970 Linkage getLinkage() const { return (Linkage) linkage; } 971 Visibility getVisibility() const { return (Visibility) visibility; } 972 bool hasLocalOrUnnamedType() const { return local; } 973 974 friend CachedProperties merge(CachedProperties L, CachedProperties R) { 975 return CachedProperties(minLinkage(L.getLinkage(), R.getLinkage()), 976 minVisibility(L.getVisibility(), R.getVisibility()), 977 L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType()); 978 } 979 }; 980 981 virtual CachedProperties getCachedProperties() const; 982 static CachedProperties getCachedProperties(QualType T) { 983 return getCachedProperties(T.getTypePtr()); 984 } 985 static CachedProperties getCachedProperties(const Type *T); 986 987 // silence VC++ warning C4355: 'this' : used in base member initializer list 988 Type *this_() { return this; } 989 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified) 990 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical) { 991 TypeBits.TC = tc; 992 TypeBits.Dependent = Dependent; 993 TypeBits.VariablyModified = VariablyModified; 994 TypeBits.CacheValidAndVisibility = 0; 995 TypeBits.CachedLocalOrUnnamed = false; 996 TypeBits.CachedLinkage = NoLinkage; 997 TypeBits.FromAST = false; 998 } 999 virtual ~Type(); 1000 friend class ASTContext; 1001 1002 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1003 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1004 1005public: 1006 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1007 1008 /// \brief Whether this type comes from an AST file. 1009 bool isFromAST() const { return TypeBits.FromAST; } 1010 1011 bool isCanonicalUnqualified() const { 1012 return CanonicalType.getTypePtr() == this; 1013 } 1014 1015 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1016 /// object types, function types, and incomplete types. 1017 1018 /// isIncompleteType - Return true if this is an incomplete type. 1019 /// A type that can describe objects, but which lacks information needed to 1020 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1021 /// routine will need to determine if the size is actually required. 1022 bool isIncompleteType() const; 1023 1024 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1025 /// type, in other words, not a function type. 1026 bool isIncompleteOrObjectType() const { 1027 return !isFunctionType(); 1028 } 1029 1030 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1031 bool isPODType() const; 1032 1033 /// isLiteralType - Return true if this is a literal type 1034 /// (C++0x [basic.types]p10) 1035 bool isLiteralType() const; 1036 1037 /// Helper methods to distinguish type categories. All type predicates 1038 /// operate on the canonical type, ignoring typedefs and qualifiers. 1039 1040 /// isBuiltinType - returns true if the type is a builtin type. 1041 bool isBuiltinType() const; 1042 1043 /// isSpecificBuiltinType - Test for a particular builtin type. 1044 bool isSpecificBuiltinType(unsigned K) const; 1045 1046 /// isPlaceholderType - Test for a type which does not represent an 1047 /// actual type-system type but is instead used as a placeholder for 1048 /// various convenient purposes within Clang. All such types are 1049 /// BuiltinTypes. 1050 bool isPlaceholderType() const; 1051 1052 /// isIntegerType() does *not* include complex integers (a GCC extension). 1053 /// isComplexIntegerType() can be used to test for complex integers. 1054 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1055 bool isEnumeralType() const; 1056 bool isBooleanType() const; 1057 bool isCharType() const; 1058 bool isWideCharType() const; 1059 bool isAnyCharacterType() const; 1060 bool isIntegralType(ASTContext &Ctx) const; 1061 1062 /// \brief Determine whether this type is an integral or enumeration type. 1063 bool isIntegralOrEnumerationType() const; 1064 /// \brief Determine whether this type is an integral or unscoped enumeration 1065 /// type. 1066 bool isIntegralOrUnscopedEnumerationType() const; 1067 1068 /// Floating point categories. 1069 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1070 /// isComplexType() does *not* include complex integers (a GCC extension). 1071 /// isComplexIntegerType() can be used to test for complex integers. 1072 bool isComplexType() const; // C99 6.2.5p11 (complex) 1073 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1074 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1075 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1076 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1077 bool isVoidType() const; // C99 6.2.5p19 1078 bool isDerivedType() const; // C99 6.2.5p20 1079 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1080 bool isAggregateType() const; 1081 1082 // Type Predicates: Check to see if this type is structurally the specified 1083 // type, ignoring typedefs and qualifiers. 1084 bool isFunctionType() const; 1085 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1086 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1087 bool isPointerType() const; 1088 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1089 bool isBlockPointerType() const; 1090 bool isVoidPointerType() const; 1091 bool isReferenceType() const; 1092 bool isLValueReferenceType() const; 1093 bool isRValueReferenceType() const; 1094 bool isFunctionPointerType() const; 1095 bool isMemberPointerType() const; 1096 bool isMemberFunctionPointerType() const; 1097 bool isMemberDataPointerType() const; 1098 bool isArrayType() const; 1099 bool isConstantArrayType() const; 1100 bool isIncompleteArrayType() const; 1101 bool isVariableArrayType() const; 1102 bool isDependentSizedArrayType() const; 1103 bool isRecordType() const; 1104 bool isClassType() const; 1105 bool isStructureType() const; 1106 bool isStructureOrClassType() const; 1107 bool isUnionType() const; 1108 bool isComplexIntegerType() const; // GCC _Complex integer type. 1109 bool isVectorType() const; // GCC vector type. 1110 bool isExtVectorType() const; // Extended vector type. 1111 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1112 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1113 // for the common case. 1114 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1115 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1116 bool isObjCQualifiedIdType() const; // id<foo> 1117 bool isObjCQualifiedClassType() const; // Class<foo> 1118 bool isObjCObjectOrInterfaceType() const; 1119 bool isObjCIdType() const; // id 1120 bool isObjCClassType() const; // Class 1121 bool isObjCSelType() const; // Class 1122 bool isObjCBuiltinType() const; // 'id' or 'Class' 1123 bool isTemplateTypeParmType() const; // C++ template type parameter 1124 bool isNullPtrType() const; // C++0x nullptr_t 1125 1126 enum ScalarTypeKind { 1127 STK_Pointer, 1128 STK_MemberPointer, 1129 STK_Bool, 1130 STK_Integral, 1131 STK_Floating, 1132 STK_IntegralComplex, 1133 STK_FloatingComplex 1134 }; 1135 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1136 ScalarTypeKind getScalarTypeKind() const; 1137 1138 /// isDependentType - Whether this type is a dependent type, meaning 1139 /// that its definition somehow depends on a template parameter 1140 /// (C++ [temp.dep.type]). 1141 bool isDependentType() const { return TypeBits.Dependent; } 1142 1143 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1144 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1145 1146 /// \brief Whether this type is or contains a local or unnamed type. 1147 bool hasUnnamedOrLocalType() const; 1148 1149 bool isOverloadableType() const; 1150 1151 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1152 bool isElaboratedTypeSpecifier() const; 1153 1154 /// hasPointerRepresentation - Whether this type is represented 1155 /// natively as a pointer; this includes pointers, references, block 1156 /// pointers, and Objective-C interface, qualified id, and qualified 1157 /// interface types, as well as nullptr_t. 1158 bool hasPointerRepresentation() const; 1159 1160 /// hasObjCPointerRepresentation - Whether this type can represent 1161 /// an objective pointer type for the purpose of GC'ability 1162 bool hasObjCPointerRepresentation() const; 1163 1164 /// \brief Determine whether this type has an integer representation 1165 /// of some sort, e.g., it is an integer type or a vector. 1166 bool hasIntegerRepresentation() const; 1167 1168 /// \brief Determine whether this type has an signed integer representation 1169 /// of some sort, e.g., it is an signed integer type or a vector. 1170 bool hasSignedIntegerRepresentation() const; 1171 1172 /// \brief Determine whether this type has an unsigned integer representation 1173 /// of some sort, e.g., it is an unsigned integer type or a vector. 1174 bool hasUnsignedIntegerRepresentation() const; 1175 1176 /// \brief Determine whether this type has a floating-point representation 1177 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1178 bool hasFloatingRepresentation() const; 1179 1180 // Type Checking Functions: Check to see if this type is structurally the 1181 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1182 // the best type we can. 1183 const RecordType *getAsStructureType() const; 1184 /// NOTE: getAs*ArrayType are methods on ASTContext. 1185 const RecordType *getAsUnionType() const; 1186 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1187 // The following is a convenience method that returns an ObjCObjectPointerType 1188 // for object declared using an interface. 1189 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1190 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1191 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1192 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1193 1194 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1195 /// because the type is a RecordType or because it is the injected-class-name 1196 /// type of a class template or class template partial specialization. 1197 CXXRecordDecl *getAsCXXRecordDecl() const; 1198 1199 // Member-template getAs<specific type>'. Look through sugar for 1200 // an instance of <specific type>. This scheme will eventually 1201 // replace the specific getAsXXXX methods above. 1202 // 1203 // There are some specializations of this member template listed 1204 // immediately following this class. 1205 template <typename T> const T *getAs() const; 1206 1207 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1208 /// element type of the array, potentially with type qualifiers missing. 1209 /// This method should never be used when type qualifiers are meaningful. 1210 const Type *getArrayElementTypeNoTypeQual() const; 1211 1212 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1213 /// pointer, this returns the respective pointee. 1214 QualType getPointeeType() const; 1215 1216 /// getUnqualifiedDesugaredType() - Return the specified type with 1217 /// any "sugar" removed from the type, removing any typedefs, 1218 /// typeofs, etc., as well as any qualifiers. 1219 const Type *getUnqualifiedDesugaredType() const; 1220 1221 /// More type predicates useful for type checking/promotion 1222 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1223 1224 /// isSignedIntegerType - Return true if this is an integer type that is 1225 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1226 /// an enum decl which has a signed representation, or a vector of signed 1227 /// integer element type. 1228 bool isSignedIntegerType() const; 1229 1230 /// isUnsignedIntegerType - Return true if this is an integer type that is 1231 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1232 /// decl which has an unsigned representation, or a vector of unsigned integer 1233 /// element type. 1234 bool isUnsignedIntegerType() const; 1235 1236 /// isConstantSizeType - Return true if this is not a variable sized type, 1237 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1238 /// incomplete types. 1239 bool isConstantSizeType() const; 1240 1241 /// isSpecifierType - Returns true if this type can be represented by some 1242 /// set of type specifiers. 1243 bool isSpecifierType() const; 1244 1245 /// \brief Determine the linkage of this type. 1246 Linkage getLinkage() const; 1247 1248 /// \brief Determine the visibility of this type. 1249 Visibility getVisibility() const; 1250 1251 /// \brief Determine the linkage and visibility of this type. 1252 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1253 1254 /// \brief Note that the linkage is no longer known. 1255 void ClearLinkageCache(); 1256 1257 const char *getTypeClassName() const; 1258 1259 QualType getCanonicalTypeInternal() const { 1260 return CanonicalType; 1261 } 1262 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1263 void dump() const; 1264 static bool classof(const Type *) { return true; } 1265 1266 friend class ASTReader; 1267 friend class ASTWriter; 1268}; 1269 1270template <> inline const TypedefType *Type::getAs() const { 1271 return dyn_cast<TypedefType>(this); 1272} 1273 1274// We can do canonical leaf types faster, because we don't have to 1275// worry about preserving child type decoration. 1276#define TYPE(Class, Base) 1277#define LEAF_TYPE(Class) \ 1278template <> inline const Class##Type *Type::getAs() const { \ 1279 return dyn_cast<Class##Type>(CanonicalType); \ 1280} 1281#include "clang/AST/TypeNodes.def" 1282 1283 1284/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1285/// types are always canonical and have a literal name field. 1286class BuiltinType : public Type { 1287public: 1288 enum Kind { 1289 Void, 1290 1291 Bool, // This is bool and/or _Bool. 1292 Char_U, // This is 'char' for targets where char is unsigned. 1293 UChar, // This is explicitly qualified unsigned char. 1294 Char16, // This is 'char16_t' for C++. 1295 Char32, // This is 'char32_t' for C++. 1296 UShort, 1297 UInt, 1298 ULong, 1299 ULongLong, 1300 UInt128, // __uint128_t 1301 1302 Char_S, // This is 'char' for targets where char is signed. 1303 SChar, // This is explicitly qualified signed char. 1304 WChar, // This is 'wchar_t' for C++. 1305 Short, 1306 Int, 1307 Long, 1308 LongLong, 1309 Int128, // __int128_t 1310 1311 Float, Double, LongDouble, 1312 1313 NullPtr, // This is the type of C++0x 'nullptr'. 1314 1315 /// This represents the type of an expression whose type is 1316 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1317 /// appear in situations where the structure of the type is 1318 /// theoretically deducible. 1319 Dependent, 1320 1321 Overload, // This represents the type of an overloaded function declaration. 1322 1323 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1324 // that has not been deduced yet. 1325 1326 /// The primitive Objective C 'id' type. The type pointed to by the 1327 /// user-visible 'id' type. Only ever shows up in an AST as the base 1328 /// type of an ObjCObjectType. 1329 ObjCId, 1330 1331 /// The primitive Objective C 'Class' type. The type pointed to by the 1332 /// user-visible 'Class' type. Only ever shows up in an AST as the 1333 /// base type of an ObjCObjectType. 1334 ObjCClass, 1335 1336 ObjCSel // This represents the ObjC 'SEL' type. 1337 }; 1338 1339protected: 1340 virtual CachedProperties getCachedProperties() const; 1341 1342public: 1343 BuiltinType(Kind K) 1344 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1345 /*VariablyModified=*/false) { 1346 BuiltinTypeBits.Kind = K; 1347 } 1348 1349 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1350 const char *getName(const LangOptions &LO) const; 1351 1352 bool isSugared() const { return false; } 1353 QualType desugar() const { return QualType(this, 0); } 1354 1355 bool isInteger() const { 1356 return getKind() >= Bool && getKind() <= Int128; 1357 } 1358 1359 bool isSignedInteger() const { 1360 return getKind() >= Char_S && getKind() <= Int128; 1361 } 1362 1363 bool isUnsignedInteger() const { 1364 return getKind() >= Bool && getKind() <= UInt128; 1365 } 1366 1367 bool isFloatingPoint() const { 1368 return getKind() >= Float && getKind() <= LongDouble; 1369 } 1370 1371 /// Determines whether this type is a "forbidden" placeholder type, 1372 /// i.e. a type which cannot appear in arbitrary positions in a 1373 /// fully-formed expression. 1374 bool isPlaceholderType() const { 1375 return getKind() == Overload || 1376 getKind() == UndeducedAuto; 1377 } 1378 1379 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1380 static bool classof(const BuiltinType *) { return true; } 1381}; 1382 1383/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1384/// types (_Complex float etc) as well as the GCC integer complex extensions. 1385/// 1386class ComplexType : public Type, public llvm::FoldingSetNode { 1387 QualType ElementType; 1388 ComplexType(QualType Element, QualType CanonicalPtr) : 1389 Type(Complex, CanonicalPtr, Element->isDependentType(), 1390 Element->isVariablyModifiedType()), 1391 ElementType(Element) { 1392 } 1393 friend class ASTContext; // ASTContext creates these. 1394 1395protected: 1396 virtual CachedProperties getCachedProperties() const; 1397 1398public: 1399 QualType getElementType() const { return ElementType; } 1400 1401 bool isSugared() const { return false; } 1402 QualType desugar() const { return QualType(this, 0); } 1403 1404 void Profile(llvm::FoldingSetNodeID &ID) { 1405 Profile(ID, getElementType()); 1406 } 1407 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1408 ID.AddPointer(Element.getAsOpaquePtr()); 1409 } 1410 1411 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1412 static bool classof(const ComplexType *) { return true; } 1413}; 1414 1415/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1416/// 1417class PointerType : public Type, public llvm::FoldingSetNode { 1418 QualType PointeeType; 1419 1420 PointerType(QualType Pointee, QualType CanonicalPtr) : 1421 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1422 Pointee->isVariablyModifiedType()), 1423 PointeeType(Pointee) { 1424 } 1425 friend class ASTContext; // ASTContext creates these. 1426 1427protected: 1428 virtual CachedProperties getCachedProperties() const; 1429 1430public: 1431 1432 QualType getPointeeType() const { return PointeeType; } 1433 1434 bool isSugared() const { return false; } 1435 QualType desugar() const { return QualType(this, 0); } 1436 1437 void Profile(llvm::FoldingSetNodeID &ID) { 1438 Profile(ID, getPointeeType()); 1439 } 1440 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1441 ID.AddPointer(Pointee.getAsOpaquePtr()); 1442 } 1443 1444 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1445 static bool classof(const PointerType *) { return true; } 1446}; 1447 1448/// BlockPointerType - pointer to a block type. 1449/// This type is to represent types syntactically represented as 1450/// "void (^)(int)", etc. Pointee is required to always be a function type. 1451/// 1452class BlockPointerType : public Type, public llvm::FoldingSetNode { 1453 QualType PointeeType; // Block is some kind of pointer type 1454 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1455 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1456 Pointee->isVariablyModifiedType()), 1457 PointeeType(Pointee) { 1458 } 1459 friend class ASTContext; // ASTContext creates these. 1460 1461protected: 1462 virtual CachedProperties getCachedProperties() const; 1463 1464public: 1465 1466 // Get the pointee type. Pointee is required to always be a function type. 1467 QualType getPointeeType() const { return PointeeType; } 1468 1469 bool isSugared() const { return false; } 1470 QualType desugar() const { return QualType(this, 0); } 1471 1472 void Profile(llvm::FoldingSetNodeID &ID) { 1473 Profile(ID, getPointeeType()); 1474 } 1475 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1476 ID.AddPointer(Pointee.getAsOpaquePtr()); 1477 } 1478 1479 static bool classof(const Type *T) { 1480 return T->getTypeClass() == BlockPointer; 1481 } 1482 static bool classof(const BlockPointerType *) { return true; } 1483}; 1484 1485/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1486/// 1487class ReferenceType : public Type, public llvm::FoldingSetNode { 1488 QualType PointeeType; 1489 1490protected: 1491 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1492 bool SpelledAsLValue) : 1493 Type(tc, CanonicalRef, Referencee->isDependentType(), 1494 Referencee->isVariablyModifiedType()), PointeeType(Referencee) { 1495 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1496 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1497 } 1498 1499 virtual CachedProperties getCachedProperties() const; 1500 1501public: 1502 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1503 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1504 1505 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1506 QualType getPointeeType() const { 1507 // FIXME: this might strip inner qualifiers; okay? 1508 const ReferenceType *T = this; 1509 while (T->isInnerRef()) 1510 T = T->PointeeType->getAs<ReferenceType>(); 1511 return T->PointeeType; 1512 } 1513 1514 void Profile(llvm::FoldingSetNodeID &ID) { 1515 Profile(ID, PointeeType, isSpelledAsLValue()); 1516 } 1517 static void Profile(llvm::FoldingSetNodeID &ID, 1518 QualType Referencee, 1519 bool SpelledAsLValue) { 1520 ID.AddPointer(Referencee.getAsOpaquePtr()); 1521 ID.AddBoolean(SpelledAsLValue); 1522 } 1523 1524 static bool classof(const Type *T) { 1525 return T->getTypeClass() == LValueReference || 1526 T->getTypeClass() == RValueReference; 1527 } 1528 static bool classof(const ReferenceType *) { return true; } 1529}; 1530 1531/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1532/// 1533class LValueReferenceType : public ReferenceType { 1534 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1535 bool SpelledAsLValue) : 1536 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1537 {} 1538 friend class ASTContext; // ASTContext creates these 1539public: 1540 bool isSugared() const { return false; } 1541 QualType desugar() const { return QualType(this, 0); } 1542 1543 static bool classof(const Type *T) { 1544 return T->getTypeClass() == LValueReference; 1545 } 1546 static bool classof(const LValueReferenceType *) { return true; } 1547}; 1548 1549/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1550/// 1551class RValueReferenceType : public ReferenceType { 1552 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1553 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1554 } 1555 friend class ASTContext; // ASTContext creates these 1556public: 1557 bool isSugared() const { return false; } 1558 QualType desugar() const { return QualType(this, 0); } 1559 1560 static bool classof(const Type *T) { 1561 return T->getTypeClass() == RValueReference; 1562 } 1563 static bool classof(const RValueReferenceType *) { return true; } 1564}; 1565 1566/// MemberPointerType - C++ 8.3.3 - Pointers to members 1567/// 1568class MemberPointerType : public Type, public llvm::FoldingSetNode { 1569 QualType PointeeType; 1570 /// The class of which the pointee is a member. Must ultimately be a 1571 /// RecordType, but could be a typedef or a template parameter too. 1572 const Type *Class; 1573 1574 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1575 Type(MemberPointer, CanonicalPtr, 1576 Cls->isDependentType() || Pointee->isDependentType(), 1577 Pointee->isVariablyModifiedType()), 1578 PointeeType(Pointee), Class(Cls) { 1579 } 1580 friend class ASTContext; // ASTContext creates these. 1581 1582protected: 1583 virtual CachedProperties getCachedProperties() const; 1584 1585public: 1586 QualType getPointeeType() const { return PointeeType; } 1587 1588 /// Returns true if the member type (i.e. the pointee type) is a 1589 /// function type rather than a data-member type. 1590 bool isMemberFunctionPointer() const { 1591 return PointeeType->isFunctionProtoType(); 1592 } 1593 1594 /// Returns true if the member type (i.e. the pointee type) is a 1595 /// data type rather than a function type. 1596 bool isMemberDataPointer() const { 1597 return !PointeeType->isFunctionProtoType(); 1598 } 1599 1600 const Type *getClass() const { return Class; } 1601 1602 bool isSugared() const { return false; } 1603 QualType desugar() const { return QualType(this, 0); } 1604 1605 void Profile(llvm::FoldingSetNodeID &ID) { 1606 Profile(ID, getPointeeType(), getClass()); 1607 } 1608 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1609 const Type *Class) { 1610 ID.AddPointer(Pointee.getAsOpaquePtr()); 1611 ID.AddPointer(Class); 1612 } 1613 1614 static bool classof(const Type *T) { 1615 return T->getTypeClass() == MemberPointer; 1616 } 1617 static bool classof(const MemberPointerType *) { return true; } 1618}; 1619 1620/// ArrayType - C99 6.7.5.2 - Array Declarators. 1621/// 1622class ArrayType : public Type, public llvm::FoldingSetNode { 1623public: 1624 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1625 /// an array with a static size (e.g. int X[static 4]), or an array 1626 /// with a star size (e.g. int X[*]). 1627 /// 'static' is only allowed on function parameters. 1628 enum ArraySizeModifier { 1629 Normal, Static, Star 1630 }; 1631private: 1632 /// ElementType - The element type of the array. 1633 QualType ElementType; 1634 1635protected: 1636 // C++ [temp.dep.type]p1: 1637 // A type is dependent if it is... 1638 // - an array type constructed from any dependent type or whose 1639 // size is specified by a constant expression that is 1640 // value-dependent, 1641 ArrayType(TypeClass tc, QualType et, QualType can, 1642 ArraySizeModifier sm, unsigned tq) 1643 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1644 (tc == VariableArray || et->isVariablyModifiedType())), 1645 ElementType(et) { 1646 ArrayTypeBits.IndexTypeQuals = tq; 1647 ArrayTypeBits.SizeModifier = sm; 1648 } 1649 1650 friend class ASTContext; // ASTContext creates these. 1651 1652 virtual CachedProperties getCachedProperties() const; 1653 1654public: 1655 QualType getElementType() const { return ElementType; } 1656 ArraySizeModifier getSizeModifier() const { 1657 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1658 } 1659 Qualifiers getIndexTypeQualifiers() const { 1660 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1661 } 1662 unsigned getIndexTypeCVRQualifiers() const { 1663 return ArrayTypeBits.IndexTypeQuals; 1664 } 1665 1666 static bool classof(const Type *T) { 1667 return T->getTypeClass() == ConstantArray || 1668 T->getTypeClass() == VariableArray || 1669 T->getTypeClass() == IncompleteArray || 1670 T->getTypeClass() == DependentSizedArray; 1671 } 1672 static bool classof(const ArrayType *) { return true; } 1673}; 1674 1675/// ConstantArrayType - This class represents the canonical version of 1676/// C arrays with a specified constant size. For example, the canonical 1677/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1678/// type is 'int' and the size is 404. 1679class ConstantArrayType : public ArrayType { 1680 llvm::APInt Size; // Allows us to unique the type. 1681 1682 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1683 ArraySizeModifier sm, unsigned tq) 1684 : ArrayType(ConstantArray, et, can, sm, tq), 1685 Size(size) {} 1686protected: 1687 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1688 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1689 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1690 friend class ASTContext; // ASTContext creates these. 1691public: 1692 const llvm::APInt &getSize() const { return Size; } 1693 bool isSugared() const { return false; } 1694 QualType desugar() const { return QualType(this, 0); } 1695 1696 1697 /// \brief Determine the number of bits required to address a member of 1698 // an array with the given element type and number of elements. 1699 static unsigned getNumAddressingBits(ASTContext &Context, 1700 QualType ElementType, 1701 const llvm::APInt &NumElements); 1702 1703 /// \brief Determine the maximum number of active bits that an array's size 1704 /// can require, which limits the maximum size of the array. 1705 static unsigned getMaxSizeBits(ASTContext &Context); 1706 1707 void Profile(llvm::FoldingSetNodeID &ID) { 1708 Profile(ID, getElementType(), getSize(), 1709 getSizeModifier(), getIndexTypeCVRQualifiers()); 1710 } 1711 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1712 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1713 unsigned TypeQuals) { 1714 ID.AddPointer(ET.getAsOpaquePtr()); 1715 ID.AddInteger(ArraySize.getZExtValue()); 1716 ID.AddInteger(SizeMod); 1717 ID.AddInteger(TypeQuals); 1718 } 1719 static bool classof(const Type *T) { 1720 return T->getTypeClass() == ConstantArray; 1721 } 1722 static bool classof(const ConstantArrayType *) { return true; } 1723}; 1724 1725/// IncompleteArrayType - This class represents C arrays with an unspecified 1726/// size. For example 'int A[]' has an IncompleteArrayType where the element 1727/// type is 'int' and the size is unspecified. 1728class IncompleteArrayType : public ArrayType { 1729 1730 IncompleteArrayType(QualType et, QualType can, 1731 ArraySizeModifier sm, unsigned tq) 1732 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1733 friend class ASTContext; // ASTContext creates these. 1734public: 1735 bool isSugared() const { return false; } 1736 QualType desugar() const { return QualType(this, 0); } 1737 1738 static bool classof(const Type *T) { 1739 return T->getTypeClass() == IncompleteArray; 1740 } 1741 static bool classof(const IncompleteArrayType *) { return true; } 1742 1743 friend class StmtIteratorBase; 1744 1745 void Profile(llvm::FoldingSetNodeID &ID) { 1746 Profile(ID, getElementType(), getSizeModifier(), 1747 getIndexTypeCVRQualifiers()); 1748 } 1749 1750 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1751 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1752 ID.AddPointer(ET.getAsOpaquePtr()); 1753 ID.AddInteger(SizeMod); 1754 ID.AddInteger(TypeQuals); 1755 } 1756}; 1757 1758/// VariableArrayType - This class represents C arrays with a specified size 1759/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1760/// Since the size expression is an arbitrary expression, we store it as such. 1761/// 1762/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1763/// should not be: two lexically equivalent variable array types could mean 1764/// different things, for example, these variables do not have the same type 1765/// dynamically: 1766/// 1767/// void foo(int x) { 1768/// int Y[x]; 1769/// ++x; 1770/// int Z[x]; 1771/// } 1772/// 1773class VariableArrayType : public ArrayType { 1774 /// SizeExpr - An assignment expression. VLA's are only permitted within 1775 /// a function block. 1776 Stmt *SizeExpr; 1777 /// Brackets - The left and right array brackets. 1778 SourceRange Brackets; 1779 1780 VariableArrayType(QualType et, QualType can, Expr *e, 1781 ArraySizeModifier sm, unsigned tq, 1782 SourceRange brackets) 1783 : ArrayType(VariableArray, et, can, sm, tq), 1784 SizeExpr((Stmt*) e), Brackets(brackets) {} 1785 friend class ASTContext; // ASTContext creates these. 1786 1787public: 1788 Expr *getSizeExpr() const { 1789 // We use C-style casts instead of cast<> here because we do not wish 1790 // to have a dependency of Type.h on Stmt.h/Expr.h. 1791 return (Expr*) SizeExpr; 1792 } 1793 SourceRange getBracketsRange() const { return Brackets; } 1794 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1795 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1796 1797 bool isSugared() const { return false; } 1798 QualType desugar() const { return QualType(this, 0); } 1799 1800 static bool classof(const Type *T) { 1801 return T->getTypeClass() == VariableArray; 1802 } 1803 static bool classof(const VariableArrayType *) { return true; } 1804 1805 friend class StmtIteratorBase; 1806 1807 void Profile(llvm::FoldingSetNodeID &ID) { 1808 assert(0 && "Cannnot unique VariableArrayTypes."); 1809 } 1810}; 1811 1812/// DependentSizedArrayType - This type represents an array type in 1813/// C++ whose size is a value-dependent expression. For example: 1814/// 1815/// \code 1816/// template<typename T, int Size> 1817/// class array { 1818/// T data[Size]; 1819/// }; 1820/// \endcode 1821/// 1822/// For these types, we won't actually know what the array bound is 1823/// until template instantiation occurs, at which point this will 1824/// become either a ConstantArrayType or a VariableArrayType. 1825class DependentSizedArrayType : public ArrayType { 1826 ASTContext &Context; 1827 1828 /// \brief An assignment expression that will instantiate to the 1829 /// size of the array. 1830 /// 1831 /// The expression itself might be NULL, in which case the array 1832 /// type will have its size deduced from an initializer. 1833 Stmt *SizeExpr; 1834 1835 /// Brackets - The left and right array brackets. 1836 SourceRange Brackets; 1837 1838 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1839 Expr *e, ArraySizeModifier sm, unsigned tq, 1840 SourceRange brackets) 1841 : ArrayType(DependentSizedArray, et, can, sm, tq), 1842 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1843 friend class ASTContext; // ASTContext creates these. 1844 1845public: 1846 Expr *getSizeExpr() const { 1847 // We use C-style casts instead of cast<> here because we do not wish 1848 // to have a dependency of Type.h on Stmt.h/Expr.h. 1849 return (Expr*) SizeExpr; 1850 } 1851 SourceRange getBracketsRange() const { return Brackets; } 1852 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1853 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1854 1855 bool isSugared() const { return false; } 1856 QualType desugar() const { return QualType(this, 0); } 1857 1858 static bool classof(const Type *T) { 1859 return T->getTypeClass() == DependentSizedArray; 1860 } 1861 static bool classof(const DependentSizedArrayType *) { return true; } 1862 1863 friend class StmtIteratorBase; 1864 1865 1866 void Profile(llvm::FoldingSetNodeID &ID) { 1867 Profile(ID, Context, getElementType(), 1868 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1869 } 1870 1871 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1872 QualType ET, ArraySizeModifier SizeMod, 1873 unsigned TypeQuals, Expr *E); 1874}; 1875 1876/// DependentSizedExtVectorType - This type represent an extended vector type 1877/// where either the type or size is dependent. For example: 1878/// @code 1879/// template<typename T, int Size> 1880/// class vector { 1881/// typedef T __attribute__((ext_vector_type(Size))) type; 1882/// } 1883/// @endcode 1884class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1885 ASTContext &Context; 1886 Expr *SizeExpr; 1887 /// ElementType - The element type of the array. 1888 QualType ElementType; 1889 SourceLocation loc; 1890 1891 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1892 QualType can, Expr *SizeExpr, SourceLocation loc) 1893 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 1894 ElementType->isVariablyModifiedType()), 1895 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1896 loc(loc) {} 1897 friend class ASTContext; 1898 1899public: 1900 Expr *getSizeExpr() const { return SizeExpr; } 1901 QualType getElementType() const { return ElementType; } 1902 SourceLocation getAttributeLoc() const { return loc; } 1903 1904 bool isSugared() const { return false; } 1905 QualType desugar() const { return QualType(this, 0); } 1906 1907 static bool classof(const Type *T) { 1908 return T->getTypeClass() == DependentSizedExtVector; 1909 } 1910 static bool classof(const DependentSizedExtVectorType *) { return true; } 1911 1912 void Profile(llvm::FoldingSetNodeID &ID) { 1913 Profile(ID, Context, getElementType(), getSizeExpr()); 1914 } 1915 1916 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1917 QualType ElementType, Expr *SizeExpr); 1918}; 1919 1920 1921/// VectorType - GCC generic vector type. This type is created using 1922/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1923/// bytes; or from an Altivec __vector or vector declaration. 1924/// Since the constructor takes the number of vector elements, the 1925/// client is responsible for converting the size into the number of elements. 1926class VectorType : public Type, public llvm::FoldingSetNode { 1927public: 1928 enum VectorKind { 1929 GenericVector, // not a target-specific vector type 1930 AltiVecVector, // is AltiVec vector 1931 AltiVecPixel, // is AltiVec 'vector Pixel' 1932 AltiVecBool, // is AltiVec 'vector bool ...' 1933 NeonVector, // is ARM Neon vector 1934 NeonPolyVector // is ARM Neon polynomial vector 1935 }; 1936protected: 1937 /// ElementType - The element type of the vector. 1938 QualType ElementType; 1939 1940 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1941 VectorKind vecKind) : 1942 Type(Vector, canonType, vecType->isDependentType(), 1943 vecType->isVariablyModifiedType()), ElementType(vecType) { 1944 VectorTypeBits.VecKind = vecKind; 1945 VectorTypeBits.NumElements = nElements; 1946 } 1947 1948 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1949 QualType canonType, VectorKind vecKind) 1950 : Type(tc, canonType, vecType->isDependentType(), 1951 vecType->isVariablyModifiedType()), ElementType(vecType) { 1952 VectorTypeBits.VecKind = vecKind; 1953 VectorTypeBits.NumElements = nElements; 1954 } 1955 friend class ASTContext; // ASTContext creates these. 1956 1957 virtual CachedProperties getCachedProperties() const; 1958 1959public: 1960 1961 QualType getElementType() const { return ElementType; } 1962 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 1963 1964 bool isSugared() const { return false; } 1965 QualType desugar() const { return QualType(this, 0); } 1966 1967 VectorKind getVectorKind() const { 1968 return VectorKind(VectorTypeBits.VecKind); 1969 } 1970 1971 void Profile(llvm::FoldingSetNodeID &ID) { 1972 Profile(ID, getElementType(), getNumElements(), 1973 getTypeClass(), getVectorKind()); 1974 } 1975 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1976 unsigned NumElements, TypeClass TypeClass, 1977 VectorKind VecKind) { 1978 ID.AddPointer(ElementType.getAsOpaquePtr()); 1979 ID.AddInteger(NumElements); 1980 ID.AddInteger(TypeClass); 1981 ID.AddInteger(VecKind); 1982 } 1983 1984 static bool classof(const Type *T) { 1985 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1986 } 1987 static bool classof(const VectorType *) { return true; } 1988}; 1989 1990/// ExtVectorType - Extended vector type. This type is created using 1991/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1992/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1993/// class enables syntactic extensions, like Vector Components for accessing 1994/// points, colors, and textures (modeled after OpenGL Shading Language). 1995class ExtVectorType : public VectorType { 1996 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1997 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 1998 friend class ASTContext; // ASTContext creates these. 1999public: 2000 static int getPointAccessorIdx(char c) { 2001 switch (c) { 2002 default: return -1; 2003 case 'x': case 'r': return 0; 2004 case 'y': case 'g': return 1; 2005 case 'z': case 'b': return 2; 2006 case 'w': case 'a': return 3; 2007 } 2008 } 2009 static int getNumericAccessorIdx(char c) { 2010 switch (c) { 2011 default: return -1; 2012 case '0': return 0; 2013 case '1': return 1; 2014 case '2': return 2; 2015 case '3': return 3; 2016 case '4': return 4; 2017 case '5': return 5; 2018 case '6': return 6; 2019 case '7': return 7; 2020 case '8': return 8; 2021 case '9': return 9; 2022 case 'A': 2023 case 'a': return 10; 2024 case 'B': 2025 case 'b': return 11; 2026 case 'C': 2027 case 'c': return 12; 2028 case 'D': 2029 case 'd': return 13; 2030 case 'E': 2031 case 'e': return 14; 2032 case 'F': 2033 case 'f': return 15; 2034 } 2035 } 2036 2037 static int getAccessorIdx(char c) { 2038 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2039 return getNumericAccessorIdx(c); 2040 } 2041 2042 bool isAccessorWithinNumElements(char c) const { 2043 if (int idx = getAccessorIdx(c)+1) 2044 return unsigned(idx-1) < getNumElements(); 2045 return false; 2046 } 2047 bool isSugared() const { return false; } 2048 QualType desugar() const { return QualType(this, 0); } 2049 2050 static bool classof(const Type *T) { 2051 return T->getTypeClass() == ExtVector; 2052 } 2053 static bool classof(const ExtVectorType *) { return true; } 2054}; 2055 2056/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2057/// class of FunctionNoProtoType and FunctionProtoType. 2058/// 2059class FunctionType : public Type { 2060 virtual void ANCHOR(); // Key function for FunctionType. 2061 2062 // The type returned by the function. 2063 QualType ResultType; 2064 2065 public: 2066 // This class is used for passing arround the information needed to 2067 // construct a call. It is not actually used for storage, just for 2068 // factoring together common arguments. 2069 // If you add a field (say Foo), other than the obvious places (both, constructors, 2070 // compile failures), what you need to update is 2071 // * Operetor== 2072 // * getFoo 2073 // * withFoo 2074 // * functionType. Add Foo, getFoo. 2075 // * ASTContext::getFooType 2076 // * ASTContext::mergeFunctionTypes 2077 // * FunctionNoProtoType::Profile 2078 // * FunctionProtoType::Profile 2079 // * TypePrinter::PrintFunctionProto 2080 // * AST read and write 2081 // * Codegen 2082 2083 class ExtInfo { 2084 enum { CallConvMask = 0x7 }; 2085 enum { NoReturnMask = 0x8 }; 2086 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2087 RegParmOffset = 4 }; 2088 2089 unsigned Bits; 2090 2091 ExtInfo(unsigned Bits) : Bits(Bits) {} 2092 2093 friend class FunctionType; 2094 2095 public: 2096 // Constructor with no defaults. Use this when you know that you 2097 // have all the elements (when reading an AST file for example). 2098 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2099 Bits = ((unsigned) cc) | 2100 (noReturn ? NoReturnMask : 0) | 2101 (regParm << RegParmOffset); 2102 } 2103 2104 // Constructor with all defaults. Use when for example creating a 2105 // function know to use defaults. 2106 ExtInfo() : Bits(0) {} 2107 2108 bool getNoReturn() const { return Bits & NoReturnMask; } 2109 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2110 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2111 2112 bool operator==(ExtInfo Other) const { 2113 return Bits == Other.Bits; 2114 } 2115 bool operator!=(ExtInfo Other) const { 2116 return Bits != Other.Bits; 2117 } 2118 2119 // Note that we don't have setters. That is by design, use 2120 // the following with methods instead of mutating these objects. 2121 2122 ExtInfo withNoReturn(bool noReturn) const { 2123 if (noReturn) 2124 return ExtInfo(Bits | NoReturnMask); 2125 else 2126 return ExtInfo(Bits & ~NoReturnMask); 2127 } 2128 2129 ExtInfo withRegParm(unsigned RegParm) const { 2130 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2131 } 2132 2133 ExtInfo withCallingConv(CallingConv cc) const { 2134 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2135 } 2136 2137 void Profile(llvm::FoldingSetNodeID &ID) { 2138 ID.AddInteger(Bits); 2139 } 2140 }; 2141 2142protected: 2143 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 2144 unsigned typeQuals, QualType Canonical, bool Dependent, 2145 bool VariablyModified, ExtInfo Info) 2146 : Type(tc, Canonical, Dependent, VariablyModified), ResultType(res) { 2147 FunctionTypeBits.ExtInfo = Info.Bits; 2148 FunctionTypeBits.SubclassInfo = SubclassInfo; 2149 FunctionTypeBits.TypeQuals = typeQuals; 2150 } 2151 bool getSubClassData() const { return FunctionTypeBits.SubclassInfo; } 2152 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2153public: 2154 2155 QualType getResultType() const { return ResultType; } 2156 2157 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2158 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2159 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2160 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2161 2162 /// \brief Determine the type of an expression that calls a function of 2163 /// this type. 2164 QualType getCallResultType(ASTContext &Context) const { 2165 return getResultType().getNonLValueExprType(Context); 2166 } 2167 2168 static llvm::StringRef getNameForCallConv(CallingConv CC); 2169 2170 static bool classof(const Type *T) { 2171 return T->getTypeClass() == FunctionNoProto || 2172 T->getTypeClass() == FunctionProto; 2173 } 2174 static bool classof(const FunctionType *) { return true; } 2175}; 2176 2177/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2178/// no information available about its arguments. 2179class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2180 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2181 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2182 /*Dependent=*/false, Result->isVariablyModifiedType(), 2183 Info) {} 2184 friend class ASTContext; // ASTContext creates these. 2185 2186protected: 2187 virtual CachedProperties getCachedProperties() const; 2188 2189public: 2190 // No additional state past what FunctionType provides. 2191 2192 bool isSugared() const { return false; } 2193 QualType desugar() const { return QualType(this, 0); } 2194 2195 void Profile(llvm::FoldingSetNodeID &ID) { 2196 Profile(ID, getResultType(), getExtInfo()); 2197 } 2198 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2199 ExtInfo Info) { 2200 Info.Profile(ID); 2201 ID.AddPointer(ResultType.getAsOpaquePtr()); 2202 } 2203 2204 static bool classof(const Type *T) { 2205 return T->getTypeClass() == FunctionNoProto; 2206 } 2207 static bool classof(const FunctionNoProtoType *) { return true; } 2208}; 2209 2210/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2211/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2212/// arguments, not as having a single void argument. Such a type can have an 2213/// exception specification, but this specification is not part of the canonical 2214/// type. 2215class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2216 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2217 bool isVariadic, unsigned typeQuals, bool hasExs, 2218 bool hasAnyExs, const QualType *ExArray, 2219 unsigned numExs, QualType Canonical, 2220 const ExtInfo &Info); 2221 2222 /// NumArgs - The number of arguments this function has, not counting '...'. 2223 unsigned NumArgs : 20; 2224 2225 /// NumExceptions - The number of types in the exception spec, if any. 2226 unsigned NumExceptions : 10; 2227 2228 /// HasExceptionSpec - Whether this function has an exception spec at all. 2229 bool HasExceptionSpec : 1; 2230 2231 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2232 bool AnyExceptionSpec : 1; 2233 2234 /// ArgInfo - There is an variable size array after the class in memory that 2235 /// holds the argument types. 2236 2237 /// Exceptions - There is another variable size array after ArgInfo that 2238 /// holds the exception types. 2239 2240 friend class ASTContext; // ASTContext creates these. 2241 2242protected: 2243 virtual CachedProperties getCachedProperties() const; 2244 2245public: 2246 unsigned getNumArgs() const { return NumArgs; } 2247 QualType getArgType(unsigned i) const { 2248 assert(i < NumArgs && "Invalid argument number!"); 2249 return arg_type_begin()[i]; 2250 } 2251 2252 bool hasExceptionSpec() const { return HasExceptionSpec; } 2253 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2254 unsigned getNumExceptions() const { return NumExceptions; } 2255 QualType getExceptionType(unsigned i) const { 2256 assert(i < NumExceptions && "Invalid exception number!"); 2257 return exception_begin()[i]; 2258 } 2259 bool hasEmptyExceptionSpec() const { 2260 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2261 getNumExceptions() == 0; 2262 } 2263 2264 bool isVariadic() const { return getSubClassData(); } 2265 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2266 2267 typedef const QualType *arg_type_iterator; 2268 arg_type_iterator arg_type_begin() const { 2269 return reinterpret_cast<const QualType *>(this+1); 2270 } 2271 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2272 2273 typedef const QualType *exception_iterator; 2274 exception_iterator exception_begin() const { 2275 // exceptions begin where arguments end 2276 return arg_type_end(); 2277 } 2278 exception_iterator exception_end() const { 2279 return exception_begin() + NumExceptions; 2280 } 2281 2282 bool isSugared() const { return false; } 2283 QualType desugar() const { return QualType(this, 0); } 2284 2285 static bool classof(const Type *T) { 2286 return T->getTypeClass() == FunctionProto; 2287 } 2288 static bool classof(const FunctionProtoType *) { return true; } 2289 2290 void Profile(llvm::FoldingSetNodeID &ID); 2291 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2292 arg_type_iterator ArgTys, unsigned NumArgs, 2293 bool isVariadic, unsigned TypeQuals, 2294 bool hasExceptionSpec, bool anyExceptionSpec, 2295 unsigned NumExceptions, exception_iterator Exs, 2296 ExtInfo ExtInfo); 2297}; 2298 2299 2300/// \brief Represents the dependent type named by a dependently-scoped 2301/// typename using declaration, e.g. 2302/// using typename Base<T>::foo; 2303/// Template instantiation turns these into the underlying type. 2304class UnresolvedUsingType : public Type { 2305 UnresolvedUsingTypenameDecl *Decl; 2306 2307 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2308 : Type(UnresolvedUsing, QualType(), true, false), 2309 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2310 friend class ASTContext; // ASTContext creates these. 2311public: 2312 2313 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2314 2315 bool isSugared() const { return false; } 2316 QualType desugar() const { return QualType(this, 0); } 2317 2318 static bool classof(const Type *T) { 2319 return T->getTypeClass() == UnresolvedUsing; 2320 } 2321 static bool classof(const UnresolvedUsingType *) { return true; } 2322 2323 void Profile(llvm::FoldingSetNodeID &ID) { 2324 return Profile(ID, Decl); 2325 } 2326 static void Profile(llvm::FoldingSetNodeID &ID, 2327 UnresolvedUsingTypenameDecl *D) { 2328 ID.AddPointer(D); 2329 } 2330}; 2331 2332 2333class TypedefType : public Type { 2334 TypedefDecl *Decl; 2335protected: 2336 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2337 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType()), 2338 Decl(const_cast<TypedefDecl*>(D)) { 2339 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2340 } 2341 friend class ASTContext; // ASTContext creates these. 2342public: 2343 2344 TypedefDecl *getDecl() const { return Decl; } 2345 2346 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2347 /// potentially looking through *all* consecutive typedefs. This returns the 2348 /// sum of the type qualifiers, so if you have: 2349 /// typedef const int A; 2350 /// typedef volatile A B; 2351 /// looking through the typedefs for B will give you "const volatile A". 2352 QualType LookThroughTypedefs() const; 2353 2354 bool isSugared() const { return true; } 2355 QualType desugar() const; 2356 2357 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2358 static bool classof(const TypedefType *) { return true; } 2359}; 2360 2361/// TypeOfExprType (GCC extension). 2362class TypeOfExprType : public Type { 2363 Expr *TOExpr; 2364 2365protected: 2366 TypeOfExprType(Expr *E, QualType can = QualType()); 2367 friend class ASTContext; // ASTContext creates these. 2368public: 2369 Expr *getUnderlyingExpr() const { return TOExpr; } 2370 2371 /// \brief Remove a single level of sugar. 2372 QualType desugar() const; 2373 2374 /// \brief Returns whether this type directly provides sugar. 2375 bool isSugared() const { return true; } 2376 2377 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2378 static bool classof(const TypeOfExprType *) { return true; } 2379}; 2380 2381/// \brief Internal representation of canonical, dependent 2382/// typeof(expr) types. 2383/// 2384/// This class is used internally by the ASTContext to manage 2385/// canonical, dependent types, only. Clients will only see instances 2386/// of this class via TypeOfExprType nodes. 2387class DependentTypeOfExprType 2388 : public TypeOfExprType, public llvm::FoldingSetNode { 2389 ASTContext &Context; 2390 2391public: 2392 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2393 : TypeOfExprType(E), Context(Context) { } 2394 2395 bool isSugared() const { return false; } 2396 QualType desugar() const { return QualType(this, 0); } 2397 2398 void Profile(llvm::FoldingSetNodeID &ID) { 2399 Profile(ID, Context, getUnderlyingExpr()); 2400 } 2401 2402 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2403 Expr *E); 2404}; 2405 2406/// TypeOfType (GCC extension). 2407class TypeOfType : public Type { 2408 QualType TOType; 2409 TypeOfType(QualType T, QualType can) 2410 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType()), 2411 TOType(T) { 2412 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2413 } 2414 friend class ASTContext; // ASTContext creates these. 2415public: 2416 QualType getUnderlyingType() const { return TOType; } 2417 2418 /// \brief Remove a single level of sugar. 2419 QualType desugar() const { return getUnderlyingType(); } 2420 2421 /// \brief Returns whether this type directly provides sugar. 2422 bool isSugared() const { return true; } 2423 2424 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2425 static bool classof(const TypeOfType *) { return true; } 2426}; 2427 2428/// DecltypeType (C++0x) 2429class DecltypeType : public Type { 2430 Expr *E; 2431 2432 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2433 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2434 // from it. 2435 QualType UnderlyingType; 2436 2437protected: 2438 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2439 friend class ASTContext; // ASTContext creates these. 2440public: 2441 Expr *getUnderlyingExpr() const { return E; } 2442 QualType getUnderlyingType() const { return UnderlyingType; } 2443 2444 /// \brief Remove a single level of sugar. 2445 QualType desugar() const { return getUnderlyingType(); } 2446 2447 /// \brief Returns whether this type directly provides sugar. 2448 bool isSugared() const { return !isDependentType(); } 2449 2450 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2451 static bool classof(const DecltypeType *) { return true; } 2452}; 2453 2454/// \brief Internal representation of canonical, dependent 2455/// decltype(expr) types. 2456/// 2457/// This class is used internally by the ASTContext to manage 2458/// canonical, dependent types, only. Clients will only see instances 2459/// of this class via DecltypeType nodes. 2460class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2461 ASTContext &Context; 2462 2463public: 2464 DependentDecltypeType(ASTContext &Context, Expr *E); 2465 2466 bool isSugared() const { return false; } 2467 QualType desugar() const { return QualType(this, 0); } 2468 2469 void Profile(llvm::FoldingSetNodeID &ID) { 2470 Profile(ID, Context, getUnderlyingExpr()); 2471 } 2472 2473 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2474 Expr *E); 2475}; 2476 2477class TagType : public Type { 2478 /// Stores the TagDecl associated with this type. The decl may point to any 2479 /// TagDecl that declares the entity. 2480 TagDecl * decl; 2481 2482protected: 2483 TagType(TypeClass TC, const TagDecl *D, QualType can); 2484 2485 virtual CachedProperties getCachedProperties() const; 2486 2487public: 2488 TagDecl *getDecl() const; 2489 2490 /// @brief Determines whether this type is in the process of being 2491 /// defined. 2492 bool isBeingDefined() const; 2493 2494 static bool classof(const Type *T) { 2495 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2496 } 2497 static bool classof(const TagType *) { return true; } 2498 static bool classof(const RecordType *) { return true; } 2499 static bool classof(const EnumType *) { return true; } 2500}; 2501 2502/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2503/// to detect TagType objects of structs/unions/classes. 2504class RecordType : public TagType { 2505protected: 2506 explicit RecordType(const RecordDecl *D) 2507 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2508 explicit RecordType(TypeClass TC, RecordDecl *D) 2509 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2510 friend class ASTContext; // ASTContext creates these. 2511public: 2512 2513 RecordDecl *getDecl() const { 2514 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2515 } 2516 2517 // FIXME: This predicate is a helper to QualType/Type. It needs to 2518 // recursively check all fields for const-ness. If any field is declared 2519 // const, it needs to return false. 2520 bool hasConstFields() const { return false; } 2521 2522 // FIXME: RecordType needs to check when it is created that all fields are in 2523 // the same address space, and return that. 2524 unsigned getAddressSpace() const { return 0; } 2525 2526 bool isSugared() const { return false; } 2527 QualType desugar() const { return QualType(this, 0); } 2528 2529 static bool classof(const TagType *T); 2530 static bool classof(const Type *T) { 2531 return isa<TagType>(T) && classof(cast<TagType>(T)); 2532 } 2533 static bool classof(const RecordType *) { return true; } 2534}; 2535 2536/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2537/// to detect TagType objects of enums. 2538class EnumType : public TagType { 2539 explicit EnumType(const EnumDecl *D) 2540 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2541 friend class ASTContext; // ASTContext creates these. 2542public: 2543 2544 EnumDecl *getDecl() const { 2545 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2546 } 2547 2548 bool isSugared() const { return false; } 2549 QualType desugar() const { return QualType(this, 0); } 2550 2551 static bool classof(const TagType *T); 2552 static bool classof(const Type *T) { 2553 return isa<TagType>(T) && classof(cast<TagType>(T)); 2554 } 2555 static bool classof(const EnumType *) { return true; } 2556}; 2557 2558class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2559 unsigned Depth : 15; 2560 unsigned ParameterPack : 1; 2561 unsigned Index : 16; 2562 IdentifierInfo *Name; 2563 2564 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2565 QualType Canon) 2566 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2567 /*VariablyModified=*/false), 2568 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2569 2570 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2571 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2572 /*VariablyModified=*/false), 2573 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2574 2575 friend class ASTContext; // ASTContext creates these 2576 2577public: 2578 unsigned getDepth() const { return Depth; } 2579 unsigned getIndex() const { return Index; } 2580 bool isParameterPack() const { return ParameterPack; } 2581 IdentifierInfo *getName() const { return Name; } 2582 2583 bool isSugared() const { return false; } 2584 QualType desugar() const { return QualType(this, 0); } 2585 2586 void Profile(llvm::FoldingSetNodeID &ID) { 2587 Profile(ID, Depth, Index, ParameterPack, Name); 2588 } 2589 2590 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2591 unsigned Index, bool ParameterPack, 2592 IdentifierInfo *Name) { 2593 ID.AddInteger(Depth); 2594 ID.AddInteger(Index); 2595 ID.AddBoolean(ParameterPack); 2596 ID.AddPointer(Name); 2597 } 2598 2599 static bool classof(const Type *T) { 2600 return T->getTypeClass() == TemplateTypeParm; 2601 } 2602 static bool classof(const TemplateTypeParmType *T) { return true; } 2603}; 2604 2605/// \brief Represents the result of substituting a type for a template 2606/// type parameter. 2607/// 2608/// Within an instantiated template, all template type parameters have 2609/// been replaced with these. They are used solely to record that a 2610/// type was originally written as a template type parameter; 2611/// therefore they are never canonical. 2612class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2613 // The original type parameter. 2614 const TemplateTypeParmType *Replaced; 2615 2616 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2617 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2618 Canon->isVariablyModifiedType()), 2619 Replaced(Param) { } 2620 2621 friend class ASTContext; 2622 2623public: 2624 IdentifierInfo *getName() const { return Replaced->getName(); } 2625 2626 /// Gets the template parameter that was substituted for. 2627 const TemplateTypeParmType *getReplacedParameter() const { 2628 return Replaced; 2629 } 2630 2631 /// Gets the type that was substituted for the template 2632 /// parameter. 2633 QualType getReplacementType() const { 2634 return getCanonicalTypeInternal(); 2635 } 2636 2637 bool isSugared() const { return true; } 2638 QualType desugar() const { return getReplacementType(); } 2639 2640 void Profile(llvm::FoldingSetNodeID &ID) { 2641 Profile(ID, getReplacedParameter(), getReplacementType()); 2642 } 2643 static void Profile(llvm::FoldingSetNodeID &ID, 2644 const TemplateTypeParmType *Replaced, 2645 QualType Replacement) { 2646 ID.AddPointer(Replaced); 2647 ID.AddPointer(Replacement.getAsOpaquePtr()); 2648 } 2649 2650 static bool classof(const Type *T) { 2651 return T->getTypeClass() == SubstTemplateTypeParm; 2652 } 2653 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2654}; 2655 2656/// \brief Represents the type of a template specialization as written 2657/// in the source code. 2658/// 2659/// Template specialization types represent the syntactic form of a 2660/// template-id that refers to a type, e.g., @c vector<int>. Some 2661/// template specialization types are syntactic sugar, whose canonical 2662/// type will point to some other type node that represents the 2663/// instantiation or class template specialization. For example, a 2664/// class template specialization type of @c vector<int> will refer to 2665/// a tag type for the instantiation 2666/// @c std::vector<int, std::allocator<int>>. 2667/// 2668/// Other template specialization types, for which the template name 2669/// is dependent, may be canonical types. These types are always 2670/// dependent. 2671class TemplateSpecializationType 2672 : public Type, public llvm::FoldingSetNode { 2673 /// \brief The name of the template being specialized. 2674 TemplateName Template; 2675 2676 /// \brief - The number of template arguments named in this class 2677 /// template specialization. 2678 unsigned NumArgs; 2679 2680 TemplateSpecializationType(TemplateName T, 2681 const TemplateArgument *Args, 2682 unsigned NumArgs, QualType Canon); 2683 2684 friend class ASTContext; // ASTContext creates these 2685 2686public: 2687 /// \brief Determine whether any of the given template arguments are 2688 /// dependent. 2689 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2690 unsigned NumArgs); 2691 2692 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2693 unsigned NumArgs); 2694 2695 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2696 2697 /// \brief Print a template argument list, including the '<' and '>' 2698 /// enclosing the template arguments. 2699 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2700 unsigned NumArgs, 2701 const PrintingPolicy &Policy); 2702 2703 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2704 unsigned NumArgs, 2705 const PrintingPolicy &Policy); 2706 2707 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2708 const PrintingPolicy &Policy); 2709 2710 /// True if this template specialization type matches a current 2711 /// instantiation in the context in which it is found. 2712 bool isCurrentInstantiation() const { 2713 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2714 } 2715 2716 typedef const TemplateArgument * iterator; 2717 2718 iterator begin() const { return getArgs(); } 2719 iterator end() const; // defined inline in TemplateBase.h 2720 2721 /// \brief Retrieve the name of the template that we are specializing. 2722 TemplateName getTemplateName() const { return Template; } 2723 2724 /// \brief Retrieve the template arguments. 2725 const TemplateArgument *getArgs() const { 2726 return reinterpret_cast<const TemplateArgument *>(this + 1); 2727 } 2728 2729 /// \brief Retrieve the number of template arguments. 2730 unsigned getNumArgs() const { return NumArgs; } 2731 2732 /// \brief Retrieve a specific template argument as a type. 2733 /// \precondition @c isArgType(Arg) 2734 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2735 2736 bool isSugared() const { 2737 return !isDependentType() || isCurrentInstantiation(); 2738 } 2739 QualType desugar() const { return getCanonicalTypeInternal(); } 2740 2741 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2742 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2743 } 2744 2745 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2746 const TemplateArgument *Args, 2747 unsigned NumArgs, 2748 ASTContext &Context); 2749 2750 static bool classof(const Type *T) { 2751 return T->getTypeClass() == TemplateSpecialization; 2752 } 2753 static bool classof(const TemplateSpecializationType *T) { return true; } 2754}; 2755 2756/// \brief The injected class name of a C++ class template or class 2757/// template partial specialization. Used to record that a type was 2758/// spelled with a bare identifier rather than as a template-id; the 2759/// equivalent for non-templated classes is just RecordType. 2760/// 2761/// Injected class name types are always dependent. Template 2762/// instantiation turns these into RecordTypes. 2763/// 2764/// Injected class name types are always canonical. This works 2765/// because it is impossible to compare an injected class name type 2766/// with the corresponding non-injected template type, for the same 2767/// reason that it is impossible to directly compare template 2768/// parameters from different dependent contexts: injected class name 2769/// types can only occur within the scope of a particular templated 2770/// declaration, and within that scope every template specialization 2771/// will canonicalize to the injected class name (when appropriate 2772/// according to the rules of the language). 2773class InjectedClassNameType : public Type { 2774 CXXRecordDecl *Decl; 2775 2776 /// The template specialization which this type represents. 2777 /// For example, in 2778 /// template <class T> class A { ... }; 2779 /// this is A<T>, whereas in 2780 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2781 /// this is A<B<X,Y> >. 2782 /// 2783 /// It is always unqualified, always a template specialization type, 2784 /// and always dependent. 2785 QualType InjectedType; 2786 2787 friend class ASTContext; // ASTContext creates these. 2788 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2789 // currently suitable for AST reading, too much 2790 // interdependencies. 2791 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2792 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2793 /*VariablyModified=*/false), 2794 Decl(D), InjectedType(TST) { 2795 assert(isa<TemplateSpecializationType>(TST)); 2796 assert(!TST.hasQualifiers()); 2797 assert(TST->isDependentType()); 2798 } 2799 2800public: 2801 QualType getInjectedSpecializationType() const { return InjectedType; } 2802 const TemplateSpecializationType *getInjectedTST() const { 2803 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2804 } 2805 2806 CXXRecordDecl *getDecl() const; 2807 2808 bool isSugared() const { return false; } 2809 QualType desugar() const { return QualType(this, 0); } 2810 2811 static bool classof(const Type *T) { 2812 return T->getTypeClass() == InjectedClassName; 2813 } 2814 static bool classof(const InjectedClassNameType *T) { return true; } 2815}; 2816 2817/// \brief The kind of a tag type. 2818enum TagTypeKind { 2819 /// \brief The "struct" keyword. 2820 TTK_Struct, 2821 /// \brief The "union" keyword. 2822 TTK_Union, 2823 /// \brief The "class" keyword. 2824 TTK_Class, 2825 /// \brief The "enum" keyword. 2826 TTK_Enum 2827}; 2828 2829/// \brief The elaboration keyword that precedes a qualified type name or 2830/// introduces an elaborated-type-specifier. 2831enum ElaboratedTypeKeyword { 2832 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2833 ETK_Struct, 2834 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2835 ETK_Union, 2836 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2837 ETK_Class, 2838 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2839 ETK_Enum, 2840 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2841 /// \c typename T::type. 2842 ETK_Typename, 2843 /// \brief No keyword precedes the qualified type name. 2844 ETK_None 2845}; 2846 2847/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2848/// The keyword in stored in the free bits of the base class. 2849/// Also provides a few static helpers for converting and printing 2850/// elaborated type keyword and tag type kind enumerations. 2851class TypeWithKeyword : public Type { 2852protected: 2853 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2854 QualType Canonical, bool Dependent, bool VariablyModified) 2855 : Type(tc, Canonical, Dependent, VariablyModified) { 2856 TypeWithKeywordBits.Keyword = Keyword; 2857 } 2858 2859public: 2860 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2861 2862 ElaboratedTypeKeyword getKeyword() const { 2863 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 2864 } 2865 2866 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2867 /// into an elaborated type keyword. 2868 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2869 2870 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2871 /// into a tag type kind. It is an error to provide a type specifier 2872 /// which *isn't* a tag kind here. 2873 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2874 2875 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2876 /// elaborated type keyword. 2877 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2878 2879 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2880 // a TagTypeKind. It is an error to provide an elaborated type keyword 2881 /// which *isn't* a tag kind here. 2882 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2883 2884 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2885 2886 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2887 2888 static const char *getTagTypeKindName(TagTypeKind Kind) { 2889 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2890 } 2891 2892 class CannotCastToThisType {}; 2893 static CannotCastToThisType classof(const Type *); 2894}; 2895 2896/// \brief Represents a type that was referred to using an elaborated type 2897/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2898/// or both. 2899/// 2900/// This type is used to keep track of a type name as written in the 2901/// source code, including tag keywords and any nested-name-specifiers. 2902/// The type itself is always "sugar", used to express what was written 2903/// in the source code but containing no additional semantic information. 2904class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2905 2906 /// \brief The nested name specifier containing the qualifier. 2907 NestedNameSpecifier *NNS; 2908 2909 /// \brief The type that this qualified name refers to. 2910 QualType NamedType; 2911 2912 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2913 QualType NamedType, QualType CanonType) 2914 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2915 NamedType->isDependentType(), 2916 NamedType->isVariablyModifiedType()), 2917 NNS(NNS), NamedType(NamedType) { 2918 assert(!(Keyword == ETK_None && NNS == 0) && 2919 "ElaboratedType cannot have elaborated type keyword " 2920 "and name qualifier both null."); 2921 } 2922 2923 friend class ASTContext; // ASTContext creates these 2924 2925public: 2926 ~ElaboratedType(); 2927 2928 /// \brief Retrieve the qualification on this type. 2929 NestedNameSpecifier *getQualifier() const { return NNS; } 2930 2931 /// \brief Retrieve the type named by the qualified-id. 2932 QualType getNamedType() const { return NamedType; } 2933 2934 /// \brief Remove a single level of sugar. 2935 QualType desugar() const { return getNamedType(); } 2936 2937 /// \brief Returns whether this type directly provides sugar. 2938 bool isSugared() const { return true; } 2939 2940 void Profile(llvm::FoldingSetNodeID &ID) { 2941 Profile(ID, getKeyword(), NNS, NamedType); 2942 } 2943 2944 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2945 NestedNameSpecifier *NNS, QualType NamedType) { 2946 ID.AddInteger(Keyword); 2947 ID.AddPointer(NNS); 2948 NamedType.Profile(ID); 2949 } 2950 2951 static bool classof(const Type *T) { 2952 return T->getTypeClass() == Elaborated; 2953 } 2954 static bool classof(const ElaboratedType *T) { return true; } 2955}; 2956 2957/// \brief Represents a qualified type name for which the type name is 2958/// dependent. 2959/// 2960/// DependentNameType represents a class of dependent types that involve a 2961/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2962/// name of a type. The DependentNameType may start with a "typename" (for a 2963/// typename-specifier), "class", "struct", "union", or "enum" (for a 2964/// dependent elaborated-type-specifier), or nothing (in contexts where we 2965/// know that we must be referring to a type, e.g., in a base class specifier). 2966class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2967 2968 /// \brief The nested name specifier containing the qualifier. 2969 NestedNameSpecifier *NNS; 2970 2971 /// \brief The type that this typename specifier refers to. 2972 const IdentifierInfo *Name; 2973 2974 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2975 const IdentifierInfo *Name, QualType CanonType) 2976 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 2977 /*VariablyModified=*/false), 2978 NNS(NNS), Name(Name) { 2979 assert(NNS->isDependent() && 2980 "DependentNameType requires a dependent nested-name-specifier"); 2981 } 2982 2983 friend class ASTContext; // ASTContext creates these 2984 2985public: 2986 virtual ~DependentNameType(); 2987 2988 /// \brief Retrieve the qualification on this type. 2989 NestedNameSpecifier *getQualifier() const { return NNS; } 2990 2991 /// \brief Retrieve the type named by the typename specifier as an 2992 /// identifier. 2993 /// 2994 /// This routine will return a non-NULL identifier pointer when the 2995 /// form of the original typename was terminated by an identifier, 2996 /// e.g., "typename T::type". 2997 const IdentifierInfo *getIdentifier() const { 2998 return Name; 2999 } 3000 3001 bool isSugared() const { return false; } 3002 QualType desugar() const { return QualType(this, 0); } 3003 3004 void Profile(llvm::FoldingSetNodeID &ID) { 3005 Profile(ID, getKeyword(), NNS, Name); 3006 } 3007 3008 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3009 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3010 ID.AddInteger(Keyword); 3011 ID.AddPointer(NNS); 3012 ID.AddPointer(Name); 3013 } 3014 3015 static bool classof(const Type *T) { 3016 return T->getTypeClass() == DependentName; 3017 } 3018 static bool classof(const DependentNameType *T) { return true; } 3019}; 3020 3021/// DependentTemplateSpecializationType - Represents a template 3022/// specialization type whose template cannot be resolved, e.g. 3023/// A<T>::template B<T> 3024class DependentTemplateSpecializationType : 3025 public TypeWithKeyword, public llvm::FoldingSetNode { 3026 3027 /// \brief The nested name specifier containing the qualifier. 3028 NestedNameSpecifier *NNS; 3029 3030 /// \brief The identifier of the template. 3031 const IdentifierInfo *Name; 3032 3033 /// \brief - The number of template arguments named in this class 3034 /// template specialization. 3035 unsigned NumArgs; 3036 3037 const TemplateArgument *getArgBuffer() const { 3038 return reinterpret_cast<const TemplateArgument*>(this+1); 3039 } 3040 TemplateArgument *getArgBuffer() { 3041 return reinterpret_cast<TemplateArgument*>(this+1); 3042 } 3043 3044 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3045 NestedNameSpecifier *NNS, 3046 const IdentifierInfo *Name, 3047 unsigned NumArgs, 3048 const TemplateArgument *Args, 3049 QualType Canon); 3050 3051 friend class ASTContext; // ASTContext creates these 3052 3053public: 3054 virtual ~DependentTemplateSpecializationType(); 3055 3056 NestedNameSpecifier *getQualifier() const { return NNS; } 3057 const IdentifierInfo *getIdentifier() const { return Name; } 3058 3059 /// \brief Retrieve the template arguments. 3060 const TemplateArgument *getArgs() const { 3061 return getArgBuffer(); 3062 } 3063 3064 /// \brief Retrieve the number of template arguments. 3065 unsigned getNumArgs() const { return NumArgs; } 3066 3067 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3068 3069 typedef const TemplateArgument * iterator; 3070 iterator begin() const { return getArgs(); } 3071 iterator end() const; // inline in TemplateBase.h 3072 3073 bool isSugared() const { return false; } 3074 QualType desugar() const { return QualType(this, 0); } 3075 3076 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 3077 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3078 } 3079 3080 static void Profile(llvm::FoldingSetNodeID &ID, 3081 ASTContext &Context, 3082 ElaboratedTypeKeyword Keyword, 3083 NestedNameSpecifier *Qualifier, 3084 const IdentifierInfo *Name, 3085 unsigned NumArgs, 3086 const TemplateArgument *Args); 3087 3088 static bool classof(const Type *T) { 3089 return T->getTypeClass() == DependentTemplateSpecialization; 3090 } 3091 static bool classof(const DependentTemplateSpecializationType *T) { 3092 return true; 3093 } 3094}; 3095 3096/// ObjCObjectType - Represents a class type in Objective C. 3097/// Every Objective C type is a combination of a base type and a 3098/// list of protocols. 3099/// 3100/// Given the following declarations: 3101/// @class C; 3102/// @protocol P; 3103/// 3104/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3105/// with base C and no protocols. 3106/// 3107/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3108/// 3109/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3110/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3111/// and no protocols. 3112/// 3113/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3114/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3115/// this should get its own sugar class to better represent the source. 3116class ObjCObjectType : public Type { 3117 // ObjCObjectType.NumProtocols - the number of protocols stored 3118 // after the ObjCObjectPointerType node. 3119 // 3120 // These protocols are those written directly on the type. If 3121 // protocol qualifiers ever become additive, the iterators will need 3122 // to get kindof complicated. 3123 // 3124 // In the canonical object type, these are sorted alphabetically 3125 // and uniqued. 3126 3127 /// Either a BuiltinType or an InterfaceType or sugar for either. 3128 QualType BaseType; 3129 3130 ObjCProtocolDecl * const *getProtocolStorage() const { 3131 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3132 } 3133 3134 ObjCProtocolDecl **getProtocolStorage(); 3135 3136protected: 3137 ObjCObjectType(QualType Canonical, QualType Base, 3138 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3139 3140 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3141 ObjCObjectType(enum Nonce_ObjCInterface) 3142 : Type(ObjCInterface, QualType(), false, false), 3143 BaseType(QualType(this_(), 0)) { 3144 ObjCObjectTypeBits.NumProtocols = 0; 3145 } 3146 3147protected: 3148 CachedProperties getCachedProperties() const; // key function 3149 3150public: 3151 /// getBaseType - Gets the base type of this object type. This is 3152 /// always (possibly sugar for) one of: 3153 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3154 /// user, which is a typedef for an ObjCPointerType) 3155 /// - the 'Class' builtin type (same caveat) 3156 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3157 QualType getBaseType() const { return BaseType; } 3158 3159 bool isObjCId() const { 3160 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3161 } 3162 bool isObjCClass() const { 3163 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3164 } 3165 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3166 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3167 bool isObjCUnqualifiedIdOrClass() const { 3168 if (!qual_empty()) return false; 3169 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3170 return T->getKind() == BuiltinType::ObjCId || 3171 T->getKind() == BuiltinType::ObjCClass; 3172 return false; 3173 } 3174 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3175 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3176 3177 /// Gets the interface declaration for this object type, if the base type 3178 /// really is an interface. 3179 ObjCInterfaceDecl *getInterface() const; 3180 3181 typedef ObjCProtocolDecl * const *qual_iterator; 3182 3183 qual_iterator qual_begin() const { return getProtocolStorage(); } 3184 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3185 3186 bool qual_empty() const { return getNumProtocols() == 0; } 3187 3188 /// getNumProtocols - Return the number of qualifying protocols in this 3189 /// interface type, or 0 if there are none. 3190 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3191 3192 /// \brief Fetch a protocol by index. 3193 ObjCProtocolDecl *getProtocol(unsigned I) const { 3194 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3195 return qual_begin()[I]; 3196 } 3197 3198 bool isSugared() const { return false; } 3199 QualType desugar() const { return QualType(this, 0); } 3200 3201 static bool classof(const Type *T) { 3202 return T->getTypeClass() == ObjCObject || 3203 T->getTypeClass() == ObjCInterface; 3204 } 3205 static bool classof(const ObjCObjectType *) { return true; } 3206}; 3207 3208/// ObjCObjectTypeImpl - A class providing a concrete implementation 3209/// of ObjCObjectType, so as to not increase the footprint of 3210/// ObjCInterfaceType. Code outside of ASTContext and the core type 3211/// system should not reference this type. 3212class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3213 friend class ASTContext; 3214 3215 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3216 // will need to be modified. 3217 3218 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3219 ObjCProtocolDecl * const *Protocols, 3220 unsigned NumProtocols) 3221 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3222 3223public: 3224 void Profile(llvm::FoldingSetNodeID &ID); 3225 static void Profile(llvm::FoldingSetNodeID &ID, 3226 QualType Base, 3227 ObjCProtocolDecl *const *protocols, 3228 unsigned NumProtocols); 3229}; 3230 3231inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3232 return reinterpret_cast<ObjCProtocolDecl**>( 3233 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3234} 3235 3236/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3237/// object oriented design. They basically correspond to C++ classes. There 3238/// are two kinds of interface types, normal interfaces like "NSString" and 3239/// qualified interfaces, which are qualified with a protocol list like 3240/// "NSString<NSCopyable, NSAmazing>". 3241/// 3242/// ObjCInterfaceType guarantees the following properties when considered 3243/// as a subtype of its superclass, ObjCObjectType: 3244/// - There are no protocol qualifiers. To reinforce this, code which 3245/// tries to invoke the protocol methods via an ObjCInterfaceType will 3246/// fail to compile. 3247/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3248/// T->getBaseType() == QualType(T, 0). 3249class ObjCInterfaceType : public ObjCObjectType { 3250 ObjCInterfaceDecl *Decl; 3251 3252 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3253 : ObjCObjectType(Nonce_ObjCInterface), 3254 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3255 friend class ASTContext; // ASTContext creates these. 3256 3257protected: 3258 virtual CachedProperties getCachedProperties() const; 3259 3260public: 3261 /// getDecl - Get the declaration of this interface. 3262 ObjCInterfaceDecl *getDecl() const { return Decl; } 3263 3264 bool isSugared() const { return false; } 3265 QualType desugar() const { return QualType(this, 0); } 3266 3267 static bool classof(const Type *T) { 3268 return T->getTypeClass() == ObjCInterface; 3269 } 3270 static bool classof(const ObjCInterfaceType *) { return true; } 3271 3272 // Nonsense to "hide" certain members of ObjCObjectType within this 3273 // class. People asking for protocols on an ObjCInterfaceType are 3274 // not going to get what they want: ObjCInterfaceTypes are 3275 // guaranteed to have no protocols. 3276 enum { 3277 qual_iterator, 3278 qual_begin, 3279 qual_end, 3280 getNumProtocols, 3281 getProtocol 3282 }; 3283}; 3284 3285inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3286 if (const ObjCInterfaceType *T = 3287 getBaseType()->getAs<ObjCInterfaceType>()) 3288 return T->getDecl(); 3289 return 0; 3290} 3291 3292/// ObjCObjectPointerType - Used to represent a pointer to an 3293/// Objective C object. These are constructed from pointer 3294/// declarators when the pointee type is an ObjCObjectType (or sugar 3295/// for one). In addition, the 'id' and 'Class' types are typedefs 3296/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3297/// are translated into these. 3298/// 3299/// Pointers to pointers to Objective C objects are still PointerTypes; 3300/// only the first level of pointer gets it own type implementation. 3301class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3302 QualType PointeeType; 3303 3304 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3305 : Type(ObjCObjectPointer, Canonical, false, false), 3306 PointeeType(Pointee) {} 3307 friend class ASTContext; // ASTContext creates these. 3308 3309protected: 3310 virtual CachedProperties getCachedProperties() const; 3311 3312public: 3313 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3314 /// The result will always be an ObjCObjectType or sugar thereof. 3315 QualType getPointeeType() const { return PointeeType; } 3316 3317 /// getObjCObjectType - Gets the type pointed to by this ObjC 3318 /// pointer. This method always returns non-null. 3319 /// 3320 /// This method is equivalent to getPointeeType() except that 3321 /// it discards any typedefs (or other sugar) between this 3322 /// type and the "outermost" object type. So for: 3323 /// @class A; @protocol P; @protocol Q; 3324 /// typedef A<P> AP; 3325 /// typedef A A1; 3326 /// typedef A1<P> A1P; 3327 /// typedef A1P<Q> A1PQ; 3328 /// For 'A*', getObjectType() will return 'A'. 3329 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3330 /// For 'AP*', getObjectType() will return 'A<P>'. 3331 /// For 'A1*', getObjectType() will return 'A'. 3332 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3333 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3334 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3335 /// adding protocols to a protocol-qualified base discards the 3336 /// old qualifiers (for now). But if it didn't, getObjectType() 3337 /// would return 'A1P<Q>' (and we'd have to make iterating over 3338 /// qualifiers more complicated). 3339 const ObjCObjectType *getObjectType() const { 3340 return PointeeType->getAs<ObjCObjectType>(); 3341 } 3342 3343 /// getInterfaceType - If this pointer points to an Objective C 3344 /// @interface type, gets the type for that interface. Any protocol 3345 /// qualifiers on the interface are ignored. 3346 /// 3347 /// \return null if the base type for this pointer is 'id' or 'Class' 3348 const ObjCInterfaceType *getInterfaceType() const { 3349 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3350 } 3351 3352 /// getInterfaceDecl - If this pointer points to an Objective @interface 3353 /// type, gets the declaration for that interface. 3354 /// 3355 /// \return null if the base type for this pointer is 'id' or 'Class' 3356 ObjCInterfaceDecl *getInterfaceDecl() const { 3357 return getObjectType()->getInterface(); 3358 } 3359 3360 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3361 /// its object type is the primitive 'id' type with no protocols. 3362 bool isObjCIdType() const { 3363 return getObjectType()->isObjCUnqualifiedId(); 3364 } 3365 3366 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3367 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3368 bool isObjCClassType() const { 3369 return getObjectType()->isObjCUnqualifiedClass(); 3370 } 3371 3372 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3373 /// non-empty set of protocols. 3374 bool isObjCQualifiedIdType() const { 3375 return getObjectType()->isObjCQualifiedId(); 3376 } 3377 3378 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3379 /// some non-empty set of protocols. 3380 bool isObjCQualifiedClassType() const { 3381 return getObjectType()->isObjCQualifiedClass(); 3382 } 3383 3384 /// An iterator over the qualifiers on the object type. Provided 3385 /// for convenience. This will always iterate over the full set of 3386 /// protocols on a type, not just those provided directly. 3387 typedef ObjCObjectType::qual_iterator qual_iterator; 3388 3389 qual_iterator qual_begin() const { 3390 return getObjectType()->qual_begin(); 3391 } 3392 qual_iterator qual_end() const { 3393 return getObjectType()->qual_end(); 3394 } 3395 bool qual_empty() const { return getObjectType()->qual_empty(); } 3396 3397 /// getNumProtocols - Return the number of qualifying protocols on 3398 /// the object type. 3399 unsigned getNumProtocols() const { 3400 return getObjectType()->getNumProtocols(); 3401 } 3402 3403 /// \brief Retrieve a qualifying protocol by index on the object 3404 /// type. 3405 ObjCProtocolDecl *getProtocol(unsigned I) const { 3406 return getObjectType()->getProtocol(I); 3407 } 3408 3409 bool isSugared() const { return false; } 3410 QualType desugar() const { return QualType(this, 0); } 3411 3412 void Profile(llvm::FoldingSetNodeID &ID) { 3413 Profile(ID, getPointeeType()); 3414 } 3415 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3416 ID.AddPointer(T.getAsOpaquePtr()); 3417 } 3418 static bool classof(const Type *T) { 3419 return T->getTypeClass() == ObjCObjectPointer; 3420 } 3421 static bool classof(const ObjCObjectPointerType *) { return true; } 3422}; 3423 3424/// A qualifier set is used to build a set of qualifiers. 3425class QualifierCollector : public Qualifiers { 3426 ASTContext *Context; 3427 3428public: 3429 QualifierCollector(Qualifiers Qs = Qualifiers()) 3430 : Qualifiers(Qs), Context(0) {} 3431 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3432 : Qualifiers(Qs), Context(&Context) {} 3433 3434 void setContext(ASTContext &C) { Context = &C; } 3435 3436 /// Collect any qualifiers on the given type and return an 3437 /// unqualified type. 3438 const Type *strip(QualType QT) { 3439 addFastQualifiers(QT.getLocalFastQualifiers()); 3440 if (QT.hasLocalNonFastQualifiers()) { 3441 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3442 Context = &EQ->getContext(); 3443 addQualifiers(EQ->getQualifiers()); 3444 return EQ->getBaseType(); 3445 } 3446 return QT.getTypePtrUnsafe(); 3447 } 3448 3449 /// Apply the collected qualifiers to the given type. 3450 QualType apply(QualType QT) const; 3451 3452 /// Apply the collected qualifiers to the given type. 3453 QualType apply(const Type* T) const; 3454 3455}; 3456 3457 3458// Inline function definitions. 3459 3460inline bool QualType::isCanonical() const { 3461 const Type *T = getTypePtr(); 3462 if (hasLocalQualifiers()) 3463 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3464 return T->isCanonicalUnqualified(); 3465} 3466 3467inline bool QualType::isCanonicalAsParam() const { 3468 if (hasLocalQualifiers()) return false; 3469 3470 const Type *T = getTypePtr(); 3471 if ((*this)->isPointerType()) { 3472 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3473 if (isa<VariableArrayType>(BaseType)) { 3474 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3475 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3476 if (VAT->getSizeExpr()) 3477 T = BaseType.getTypePtr(); 3478 } 3479 } 3480 return T->isCanonicalUnqualified() && 3481 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3482} 3483 3484inline bool QualType::isConstQualified() const { 3485 return isLocalConstQualified() || 3486 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3487} 3488 3489inline bool QualType::isRestrictQualified() const { 3490 return isLocalRestrictQualified() || 3491 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3492} 3493 3494 3495inline bool QualType::isVolatileQualified() const { 3496 return isLocalVolatileQualified() || 3497 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3498} 3499 3500inline bool QualType::hasQualifiers() const { 3501 return hasLocalQualifiers() || 3502 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3503} 3504 3505inline Qualifiers QualType::getQualifiers() const { 3506 Qualifiers Quals = getLocalQualifiers(); 3507 Quals.addQualifiers( 3508 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3509 return Quals; 3510} 3511 3512inline unsigned QualType::getCVRQualifiers() const { 3513 return getLocalCVRQualifiers() | 3514 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3515} 3516 3517/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3518/// type, returns them. Otherwise, if this is an array type, recurses 3519/// on the element type until some qualifiers have been found or a non-array 3520/// type reached. 3521inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3522 if (unsigned Quals = getCVRQualifiers()) 3523 return Quals; 3524 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3525 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3526 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3527 return 0; 3528} 3529 3530inline void QualType::removeConst() { 3531 removeFastQualifiers(Qualifiers::Const); 3532} 3533 3534inline void QualType::removeRestrict() { 3535 removeFastQualifiers(Qualifiers::Restrict); 3536} 3537 3538inline void QualType::removeVolatile() { 3539 QualifierCollector Qc; 3540 const Type *Ty = Qc.strip(*this); 3541 if (Qc.hasVolatile()) { 3542 Qc.removeVolatile(); 3543 *this = Qc.apply(Ty); 3544 } 3545} 3546 3547inline void QualType::removeCVRQualifiers(unsigned Mask) { 3548 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3549 3550 // Fast path: we don't need to touch the slow qualifiers. 3551 if (!(Mask & ~Qualifiers::FastMask)) { 3552 removeFastQualifiers(Mask); 3553 return; 3554 } 3555 3556 QualifierCollector Qc; 3557 const Type *Ty = Qc.strip(*this); 3558 Qc.removeCVRQualifiers(Mask); 3559 *this = Qc.apply(Ty); 3560} 3561 3562/// getAddressSpace - Return the address space of this type. 3563inline unsigned QualType::getAddressSpace() const { 3564 if (hasLocalNonFastQualifiers()) { 3565 const ExtQuals *EQ = getExtQualsUnsafe(); 3566 if (EQ->hasAddressSpace()) 3567 return EQ->getAddressSpace(); 3568 } 3569 3570 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3571 if (CT.hasLocalNonFastQualifiers()) { 3572 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3573 if (EQ->hasAddressSpace()) 3574 return EQ->getAddressSpace(); 3575 } 3576 3577 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3578 return AT->getElementType().getAddressSpace(); 3579 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3580 return RT->getAddressSpace(); 3581 return 0; 3582} 3583 3584/// getObjCGCAttr - Return the gc attribute of this type. 3585inline Qualifiers::GC QualType::getObjCGCAttr() const { 3586 if (hasLocalNonFastQualifiers()) { 3587 const ExtQuals *EQ = getExtQualsUnsafe(); 3588 if (EQ->hasObjCGCAttr()) 3589 return EQ->getObjCGCAttr(); 3590 } 3591 3592 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3593 if (CT.hasLocalNonFastQualifiers()) { 3594 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3595 if (EQ->hasObjCGCAttr()) 3596 return EQ->getObjCGCAttr(); 3597 } 3598 3599 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3600 return AT->getElementType().getObjCGCAttr(); 3601 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3602 return PT->getPointeeType().getObjCGCAttr(); 3603 // We most look at all pointer types, not just pointer to interface types. 3604 if (const PointerType *PT = CT->getAs<PointerType>()) 3605 return PT->getPointeeType().getObjCGCAttr(); 3606 return Qualifiers::GCNone; 3607} 3608 3609inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3610 if (const PointerType *PT = t.getAs<PointerType>()) { 3611 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3612 return FT->getExtInfo(); 3613 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3614 return FT->getExtInfo(); 3615 3616 return FunctionType::ExtInfo(); 3617} 3618 3619inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3620 return getFunctionExtInfo(*t); 3621} 3622 3623/// \brief Determine whether this set of qualifiers is a superset of the given 3624/// set of qualifiers. 3625inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3626 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3627} 3628 3629/// isMoreQualifiedThan - Determine whether this type is more 3630/// qualified than the Other type. For example, "const volatile int" 3631/// is more qualified than "const int", "volatile int", and 3632/// "int". However, it is not more qualified than "const volatile 3633/// int". 3634inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3635 // FIXME: work on arbitrary qualifiers 3636 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3637 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3638 if (getAddressSpace() != Other.getAddressSpace()) 3639 return false; 3640 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3641} 3642 3643/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3644/// as qualified as the Other type. For example, "const volatile 3645/// int" is at least as qualified as "const int", "volatile int", 3646/// "int", and "const volatile int". 3647inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3648 // FIXME: work on arbitrary qualifiers 3649 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3650 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3651 if (getAddressSpace() != Other.getAddressSpace()) 3652 return false; 3653 return (MyQuals | OtherQuals) == MyQuals; 3654} 3655 3656/// getNonReferenceType - If Type is a reference type (e.g., const 3657/// int&), returns the type that the reference refers to ("const 3658/// int"). Otherwise, returns the type itself. This routine is used 3659/// throughout Sema to implement C++ 5p6: 3660/// 3661/// If an expression initially has the type "reference to T" (8.3.2, 3662/// 8.5.3), the type is adjusted to "T" prior to any further 3663/// analysis, the expression designates the object or function 3664/// denoted by the reference, and the expression is an lvalue. 3665inline QualType QualType::getNonReferenceType() const { 3666 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3667 return RefType->getPointeeType(); 3668 else 3669 return *this; 3670} 3671 3672inline bool Type::isFunctionType() const { 3673 return isa<FunctionType>(CanonicalType); 3674} 3675inline bool Type::isPointerType() const { 3676 return isa<PointerType>(CanonicalType); 3677} 3678inline bool Type::isAnyPointerType() const { 3679 return isPointerType() || isObjCObjectPointerType(); 3680} 3681inline bool Type::isBlockPointerType() const { 3682 return isa<BlockPointerType>(CanonicalType); 3683} 3684inline bool Type::isReferenceType() const { 3685 return isa<ReferenceType>(CanonicalType); 3686} 3687inline bool Type::isLValueReferenceType() const { 3688 return isa<LValueReferenceType>(CanonicalType); 3689} 3690inline bool Type::isRValueReferenceType() const { 3691 return isa<RValueReferenceType>(CanonicalType); 3692} 3693inline bool Type::isFunctionPointerType() const { 3694 if (const PointerType* T = getAs<PointerType>()) 3695 return T->getPointeeType()->isFunctionType(); 3696 else 3697 return false; 3698} 3699inline bool Type::isMemberPointerType() const { 3700 return isa<MemberPointerType>(CanonicalType); 3701} 3702inline bool Type::isMemberFunctionPointerType() const { 3703 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3704 return T->isMemberFunctionPointer(); 3705 else 3706 return false; 3707} 3708inline bool Type::isMemberDataPointerType() const { 3709 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3710 return T->isMemberDataPointer(); 3711 else 3712 return false; 3713} 3714inline bool Type::isArrayType() const { 3715 return isa<ArrayType>(CanonicalType); 3716} 3717inline bool Type::isConstantArrayType() const { 3718 return isa<ConstantArrayType>(CanonicalType); 3719} 3720inline bool Type::isIncompleteArrayType() const { 3721 return isa<IncompleteArrayType>(CanonicalType); 3722} 3723inline bool Type::isVariableArrayType() const { 3724 return isa<VariableArrayType>(CanonicalType); 3725} 3726inline bool Type::isDependentSizedArrayType() const { 3727 return isa<DependentSizedArrayType>(CanonicalType); 3728} 3729inline bool Type::isBuiltinType() const { 3730 return isa<BuiltinType>(CanonicalType); 3731} 3732inline bool Type::isRecordType() const { 3733 return isa<RecordType>(CanonicalType); 3734} 3735inline bool Type::isEnumeralType() const { 3736 return isa<EnumType>(CanonicalType); 3737} 3738inline bool Type::isAnyComplexType() const { 3739 return isa<ComplexType>(CanonicalType); 3740} 3741inline bool Type::isVectorType() const { 3742 return isa<VectorType>(CanonicalType); 3743} 3744inline bool Type::isExtVectorType() const { 3745 return isa<ExtVectorType>(CanonicalType); 3746} 3747inline bool Type::isObjCObjectPointerType() const { 3748 return isa<ObjCObjectPointerType>(CanonicalType); 3749} 3750inline bool Type::isObjCObjectType() const { 3751 return isa<ObjCObjectType>(CanonicalType); 3752} 3753inline bool Type::isObjCObjectOrInterfaceType() const { 3754 return isa<ObjCInterfaceType>(CanonicalType) || 3755 isa<ObjCObjectType>(CanonicalType); 3756} 3757 3758inline bool Type::isObjCQualifiedIdType() const { 3759 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3760 return OPT->isObjCQualifiedIdType(); 3761 return false; 3762} 3763inline bool Type::isObjCQualifiedClassType() const { 3764 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3765 return OPT->isObjCQualifiedClassType(); 3766 return false; 3767} 3768inline bool Type::isObjCIdType() const { 3769 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3770 return OPT->isObjCIdType(); 3771 return false; 3772} 3773inline bool Type::isObjCClassType() const { 3774 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3775 return OPT->isObjCClassType(); 3776 return false; 3777} 3778inline bool Type::isObjCSelType() const { 3779 if (const PointerType *OPT = getAs<PointerType>()) 3780 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3781 return false; 3782} 3783inline bool Type::isObjCBuiltinType() const { 3784 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3785} 3786inline bool Type::isTemplateTypeParmType() const { 3787 return isa<TemplateTypeParmType>(CanonicalType); 3788} 3789 3790inline bool Type::isSpecificBuiltinType(unsigned K) const { 3791 if (const BuiltinType *BT = getAs<BuiltinType>()) 3792 if (BT->getKind() == (BuiltinType::Kind) K) 3793 return true; 3794 return false; 3795} 3796 3797inline bool Type::isPlaceholderType() const { 3798 if (const BuiltinType *BT = getAs<BuiltinType>()) 3799 return BT->isPlaceholderType(); 3800 return false; 3801} 3802 3803/// \brief Determines whether this is a type for which one can define 3804/// an overloaded operator. 3805inline bool Type::isOverloadableType() const { 3806 return isDependentType() || isRecordType() || isEnumeralType(); 3807} 3808 3809inline bool Type::hasPointerRepresentation() const { 3810 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3811 isObjCObjectPointerType() || isNullPtrType()); 3812} 3813 3814inline bool Type::hasObjCPointerRepresentation() const { 3815 return isObjCObjectPointerType(); 3816} 3817 3818/// Insertion operator for diagnostics. This allows sending QualType's into a 3819/// diagnostic with <<. 3820inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3821 QualType T) { 3822 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3823 Diagnostic::ak_qualtype); 3824 return DB; 3825} 3826 3827/// Insertion operator for partial diagnostics. This allows sending QualType's 3828/// into a diagnostic with <<. 3829inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3830 QualType T) { 3831 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3832 Diagnostic::ak_qualtype); 3833 return PD; 3834} 3835 3836// Helper class template that is used by Type::getAs to ensure that one does 3837// not try to look through a qualified type to get to an array type. 3838template<typename T, 3839 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3840 llvm::is_base_of<ArrayType, T>::value)> 3841struct ArrayType_cannot_be_used_with_getAs { }; 3842 3843template<typename T> 3844struct ArrayType_cannot_be_used_with_getAs<T, true>; 3845 3846/// Member-template getAs<specific type>'. 3847template <typename T> const T *Type::getAs() const { 3848 ArrayType_cannot_be_used_with_getAs<T> at; 3849 (void)at; 3850 3851 // If this is directly a T type, return it. 3852 if (const T *Ty = dyn_cast<T>(this)) 3853 return Ty; 3854 3855 // If the canonical form of this type isn't the right kind, reject it. 3856 if (!isa<T>(CanonicalType)) 3857 return 0; 3858 3859 // If this is a typedef for the type, strip the typedef off without 3860 // losing all typedef information. 3861 return cast<T>(getUnqualifiedDesugaredType()); 3862} 3863 3864} // end namespace clang 3865 3866#endif 3867