Type.h revision f11e7f7a1d04438e9bacdcfb04a110ea01dcadee
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/AST/NestedNameSpecifier.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 95 class ElaboratedType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool isSupersetOf(Qualifiers Other) const; 275 276 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 277 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 278 279 operator bool() const { return hasQualifiers(); } 280 281 Qualifiers &operator+=(Qualifiers R) { 282 addQualifiers(R); 283 return *this; 284 } 285 286 // Union two qualifier sets. If an enumerated qualifier appears 287 // in both sets, use the one from the right. 288 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 289 L += R; 290 return L; 291 } 292 293 Qualifiers &operator-=(Qualifiers R) { 294 Mask = Mask & ~(R.Mask); 295 return *this; 296 } 297 298 /// \brief Compute the difference between two qualifier sets. 299 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 300 L -= R; 301 return L; 302 } 303 304 std::string getAsString() const; 305 std::string getAsString(const PrintingPolicy &Policy) const { 306 std::string Buffer; 307 getAsStringInternal(Buffer, Policy); 308 return Buffer; 309 } 310 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 311 312 void Profile(llvm::FoldingSetNodeID &ID) const { 313 ID.AddInteger(Mask); 314 } 315 316private: 317 318 // bits: |0 1 2|3 .. 4|5 .. 31| 319 // |C R V|GCAttr|AddrSpace| 320 uint32_t Mask; 321 322 static const uint32_t GCAttrMask = 0x18; 323 static const uint32_t GCAttrShift = 3; 324 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 325 static const uint32_t AddressSpaceShift = 5; 326}; 327 328 329/// ExtQuals - We can encode up to three bits in the low bits of a 330/// type pointer, but there are many more type qualifiers that we want 331/// to be able to apply to an arbitrary type. Therefore we have this 332/// struct, intended to be heap-allocated and used by QualType to 333/// store qualifiers. 334/// 335/// The current design tags the 'const' and 'restrict' qualifiers in 336/// two low bits on the QualType pointer; a third bit records whether 337/// the pointer is an ExtQuals node. 'const' was chosen because it is 338/// orders of magnitude more common than the other two qualifiers, in 339/// both library and user code. It's relatively rare to see 340/// 'restrict' in user code, but many standard C headers are saturated 341/// with 'restrict' declarations, so that representing them efficiently 342/// is a critical goal of this representation. 343class ExtQuals : public llvm::FoldingSetNode { 344 // NOTE: changing the fast qualifiers should be straightforward as 345 // long as you don't make 'const' non-fast. 346 // 1. Qualifiers: 347 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 348 // Fast qualifiers must occupy the low-order bits. 349 // b) Update Qualifiers::FastWidth and FastMask. 350 // 2. QualType: 351 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 352 // b) Update remove{Volatile,Restrict}, defined near the end of 353 // this header. 354 // 3. ASTContext: 355 // a) Update get{Volatile,Restrict}Type. 356 357 /// Context - the context to which this set belongs. We save this 358 /// here so that QualifierCollector can use it to reapply extended 359 /// qualifiers to an arbitrary type without requiring a context to 360 /// be pushed through every single API dealing with qualifiers. 361 ASTContext& Context; 362 363 /// BaseType - the underlying type that this qualifies 364 const Type *BaseType; 365 366 /// Quals - the immutable set of qualifiers applied by this 367 /// node; always contains extended qualifiers. 368 Qualifiers Quals; 369 370public: 371 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 372 : Context(Context), BaseType(Base), Quals(Quals) 373 { 374 assert(Quals.hasNonFastQualifiers() 375 && "ExtQuals created with no fast qualifiers"); 376 assert(!Quals.hasFastQualifiers() 377 && "ExtQuals created with fast qualifiers"); 378 } 379 380 Qualifiers getQualifiers() const { return Quals; } 381 382 bool hasVolatile() const { return Quals.hasVolatile(); } 383 384 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 385 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 386 387 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 388 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 389 390 const Type *getBaseType() const { return BaseType; } 391 392 ASTContext &getContext() const { return Context; } 393 394public: 395 void Profile(llvm::FoldingSetNodeID &ID) const { 396 Profile(ID, getBaseType(), Quals); 397 } 398 static void Profile(llvm::FoldingSetNodeID &ID, 399 const Type *BaseType, 400 Qualifiers Quals) { 401 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 402 ID.AddPointer(BaseType); 403 Quals.Profile(ID); 404 } 405}; 406 407/// CallingConv - Specifies the calling convention that a function uses. 408enum CallingConv { 409 CC_Default, 410 CC_C, // __attribute__((cdecl)) 411 CC_X86StdCall, // __attribute__((stdcall)) 412 CC_X86FastCall, // __attribute__((fastcall)) 413 CC_X86ThisCall, // __attribute__((thiscall)) 414 CC_X86Pascal // __attribute__((pascal)) 415}; 416 417 418/// QualType - For efficiency, we don't store CV-qualified types as nodes on 419/// their own: instead each reference to a type stores the qualifiers. This 420/// greatly reduces the number of nodes we need to allocate for types (for 421/// example we only need one for 'int', 'const int', 'volatile int', 422/// 'const volatile int', etc). 423/// 424/// As an added efficiency bonus, instead of making this a pair, we 425/// just store the two bits we care about in the low bits of the 426/// pointer. To handle the packing/unpacking, we make QualType be a 427/// simple wrapper class that acts like a smart pointer. A third bit 428/// indicates whether there are extended qualifiers present, in which 429/// case the pointer points to a special structure. 430class QualType { 431 // Thankfully, these are efficiently composable. 432 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 433 Qualifiers::FastWidth> Value; 434 435 const ExtQuals *getExtQualsUnsafe() const { 436 return Value.getPointer().get<const ExtQuals*>(); 437 } 438 439 const Type *getTypePtrUnsafe() const { 440 return Value.getPointer().get<const Type*>(); 441 } 442 443 QualType getUnqualifiedTypeSlow() const; 444 445 friend class QualifierCollector; 446public: 447 QualType() {} 448 449 QualType(const Type *Ptr, unsigned Quals) 450 : Value(Ptr, Quals) {} 451 QualType(const ExtQuals *Ptr, unsigned Quals) 452 : Value(Ptr, Quals) {} 453 454 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 455 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 456 457 /// Retrieves a pointer to the underlying (unqualified) type. 458 /// This should really return a const Type, but it's not worth 459 /// changing all the users right now. 460 Type *getTypePtr() const { 461 if (hasLocalNonFastQualifiers()) 462 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 463 return const_cast<Type*>(getTypePtrUnsafe()); 464 } 465 466 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 467 static QualType getFromOpaquePtr(void *Ptr) { 468 QualType T; 469 T.Value.setFromOpaqueValue(Ptr); 470 return T; 471 } 472 473 Type &operator*() const { 474 return *getTypePtr(); 475 } 476 477 Type *operator->() const { 478 return getTypePtr(); 479 } 480 481 bool isCanonical() const; 482 bool isCanonicalAsParam() const; 483 484 /// isNull - Return true if this QualType doesn't point to a type yet. 485 bool isNull() const { 486 return Value.getPointer().isNull(); 487 } 488 489 /// \brief Determine whether this particular QualType instance has the 490 /// "const" qualifier set, without looking through typedefs that may have 491 /// added "const" at a different level. 492 bool isLocalConstQualified() const { 493 return (getLocalFastQualifiers() & Qualifiers::Const); 494 } 495 496 /// \brief Determine whether this type is const-qualified. 497 bool isConstQualified() const; 498 499 /// \brief Determine whether this particular QualType instance has the 500 /// "restrict" qualifier set, without looking through typedefs that may have 501 /// added "restrict" at a different level. 502 bool isLocalRestrictQualified() const { 503 return (getLocalFastQualifiers() & Qualifiers::Restrict); 504 } 505 506 /// \brief Determine whether this type is restrict-qualified. 507 bool isRestrictQualified() const; 508 509 /// \brief Determine whether this particular QualType instance has the 510 /// "volatile" qualifier set, without looking through typedefs that may have 511 /// added "volatile" at a different level. 512 bool isLocalVolatileQualified() const { 513 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 514 } 515 516 /// \brief Determine whether this type is volatile-qualified. 517 bool isVolatileQualified() const; 518 519 /// \brief Determine whether this particular QualType instance has any 520 /// qualifiers, without looking through any typedefs that might add 521 /// qualifiers at a different level. 522 bool hasLocalQualifiers() const { 523 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 524 } 525 526 /// \brief Determine whether this type has any qualifiers. 527 bool hasQualifiers() const; 528 529 /// \brief Determine whether this particular QualType instance has any 530 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 531 /// instance. 532 bool hasLocalNonFastQualifiers() const { 533 return Value.getPointer().is<const ExtQuals*>(); 534 } 535 536 /// \brief Retrieve the set of qualifiers local to this particular QualType 537 /// instance, not including any qualifiers acquired through typedefs or 538 /// other sugar. 539 Qualifiers getLocalQualifiers() const { 540 Qualifiers Quals; 541 if (hasLocalNonFastQualifiers()) 542 Quals = getExtQualsUnsafe()->getQualifiers(); 543 Quals.addFastQualifiers(getLocalFastQualifiers()); 544 return Quals; 545 } 546 547 /// \brief Retrieve the set of qualifiers applied to this type. 548 Qualifiers getQualifiers() const; 549 550 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 551 /// local to this particular QualType instance, not including any qualifiers 552 /// acquired through typedefs or other sugar. 553 unsigned getLocalCVRQualifiers() const { 554 unsigned CVR = getLocalFastQualifiers(); 555 if (isLocalVolatileQualified()) 556 CVR |= Qualifiers::Volatile; 557 return CVR; 558 } 559 560 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 561 /// applied to this type. 562 unsigned getCVRQualifiers() const; 563 564 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 565 /// applied to this type, looking through any number of unqualified array 566 /// types to their element types' qualifiers. 567 unsigned getCVRQualifiersThroughArrayTypes() const; 568 569 bool isConstant(ASTContext& Ctx) const { 570 return QualType::isConstant(*this, Ctx); 571 } 572 573 // Don't promise in the API that anything besides 'const' can be 574 // easily added. 575 576 /// addConst - add the specified type qualifier to this QualType. 577 void addConst() { 578 addFastQualifiers(Qualifiers::Const); 579 } 580 QualType withConst() const { 581 return withFastQualifiers(Qualifiers::Const); 582 } 583 584 void addFastQualifiers(unsigned TQs) { 585 assert(!(TQs & ~Qualifiers::FastMask) 586 && "non-fast qualifier bits set in mask!"); 587 Value.setInt(Value.getInt() | TQs); 588 } 589 590 // FIXME: The remove* functions are semantically broken, because they might 591 // not remove a qualifier stored on a typedef. Most of the with* functions 592 // have the same problem. 593 void removeConst(); 594 void removeVolatile(); 595 void removeRestrict(); 596 void removeCVRQualifiers(unsigned Mask); 597 598 void removeFastQualifiers() { Value.setInt(0); } 599 void removeFastQualifiers(unsigned Mask) { 600 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 601 Value.setInt(Value.getInt() & ~Mask); 602 } 603 604 // Creates a type with the given qualifiers in addition to any 605 // qualifiers already on this type. 606 QualType withFastQualifiers(unsigned TQs) const { 607 QualType T = *this; 608 T.addFastQualifiers(TQs); 609 return T; 610 } 611 612 // Creates a type with exactly the given fast qualifiers, removing 613 // any existing fast qualifiers. 614 QualType withExactFastQualifiers(unsigned TQs) const { 615 return withoutFastQualifiers().withFastQualifiers(TQs); 616 } 617 618 // Removes fast qualifiers, but leaves any extended qualifiers in place. 619 QualType withoutFastQualifiers() const { 620 QualType T = *this; 621 T.removeFastQualifiers(); 622 return T; 623 } 624 625 /// \brief Return this type with all of the instance-specific qualifiers 626 /// removed, but without removing any qualifiers that may have been applied 627 /// through typedefs. 628 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 629 630 /// \brief Return the unqualified form of the given type, which might be 631 /// desugared to eliminate qualifiers introduced via typedefs. 632 QualType getUnqualifiedType() const { 633 QualType T = getLocalUnqualifiedType(); 634 if (!T.hasQualifiers()) 635 return T; 636 637 return getUnqualifiedTypeSlow(); 638 } 639 640 bool isMoreQualifiedThan(QualType Other) const; 641 bool isAtLeastAsQualifiedAs(QualType Other) const; 642 QualType getNonReferenceType() const; 643 644 /// \brief Determine the type of a (typically non-lvalue) expression with the 645 /// specified result type. 646 /// 647 /// This routine should be used for expressions for which the return type is 648 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 649 /// an lvalue. It removes a top-level reference (since there are no 650 /// expressions of reference type) and deletes top-level cvr-qualifiers 651 /// from non-class types (in C++) or all types (in C). 652 QualType getNonLValueExprType(ASTContext &Context) const; 653 654 /// getDesugaredType - Return the specified type with any "sugar" removed from 655 /// the type. This takes off typedefs, typeof's etc. If the outer level of 656 /// the type is already concrete, it returns it unmodified. This is similar 657 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 658 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 659 /// concrete. 660 /// 661 /// Qualifiers are left in place. 662 QualType getDesugaredType() const { 663 return QualType::getDesugaredType(*this); 664 } 665 666 /// operator==/!= - Indicate whether the specified types and qualifiers are 667 /// identical. 668 friend bool operator==(const QualType &LHS, const QualType &RHS) { 669 return LHS.Value == RHS.Value; 670 } 671 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 672 return LHS.Value != RHS.Value; 673 } 674 std::string getAsString() const; 675 676 std::string getAsString(const PrintingPolicy &Policy) const { 677 std::string S; 678 getAsStringInternal(S, Policy); 679 return S; 680 } 681 void getAsStringInternal(std::string &Str, 682 const PrintingPolicy &Policy) const; 683 684 void dump(const char *s) const; 685 void dump() const; 686 687 void Profile(llvm::FoldingSetNodeID &ID) const { 688 ID.AddPointer(getAsOpaquePtr()); 689 } 690 691 /// getAddressSpace - Return the address space of this type. 692 inline unsigned getAddressSpace() const; 693 694 /// GCAttrTypesAttr - Returns gc attribute of this type. 695 inline Qualifiers::GC getObjCGCAttr() const; 696 697 /// isObjCGCWeak true when Type is objc's weak. 698 bool isObjCGCWeak() const { 699 return getObjCGCAttr() == Qualifiers::Weak; 700 } 701 702 /// isObjCGCStrong true when Type is objc's strong. 703 bool isObjCGCStrong() const { 704 return getObjCGCAttr() == Qualifiers::Strong; 705 } 706 707private: 708 // These methods are implemented in a separate translation unit; 709 // "static"-ize them to avoid creating temporary QualTypes in the 710 // caller. 711 static bool isConstant(QualType T, ASTContext& Ctx); 712 static QualType getDesugaredType(QualType T); 713}; 714 715} // end clang. 716 717namespace llvm { 718/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 719/// to a specific Type class. 720template<> struct simplify_type<const ::clang::QualType> { 721 typedef ::clang::Type* SimpleType; 722 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 723 return Val.getTypePtr(); 724 } 725}; 726template<> struct simplify_type< ::clang::QualType> 727 : public simplify_type<const ::clang::QualType> {}; 728 729// Teach SmallPtrSet that QualType is "basically a pointer". 730template<> 731class PointerLikeTypeTraits<clang::QualType> { 732public: 733 static inline void *getAsVoidPointer(clang::QualType P) { 734 return P.getAsOpaquePtr(); 735 } 736 static inline clang::QualType getFromVoidPointer(void *P) { 737 return clang::QualType::getFromOpaquePtr(P); 738 } 739 // Various qualifiers go in low bits. 740 enum { NumLowBitsAvailable = 0 }; 741}; 742 743} // end namespace llvm 744 745namespace clang { 746 747/// Type - This is the base class of the type hierarchy. A central concept 748/// with types is that each type always has a canonical type. A canonical type 749/// is the type with any typedef names stripped out of it or the types it 750/// references. For example, consider: 751/// 752/// typedef int foo; 753/// typedef foo* bar; 754/// 'int *' 'foo *' 'bar' 755/// 756/// There will be a Type object created for 'int'. Since int is canonical, its 757/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 758/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 759/// there is a PointerType that represents 'int*', which, like 'int', is 760/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 761/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 762/// is also 'int*'. 763/// 764/// Non-canonical types are useful for emitting diagnostics, without losing 765/// information about typedefs being used. Canonical types are useful for type 766/// comparisons (they allow by-pointer equality tests) and useful for reasoning 767/// about whether something has a particular form (e.g. is a function type), 768/// because they implicitly, recursively, strip all typedefs out of a type. 769/// 770/// Types, once created, are immutable. 771/// 772class Type { 773public: 774 enum TypeClass { 775#define TYPE(Class, Base) Class, 776#define LAST_TYPE(Class) TypeLast = Class, 777#define ABSTRACT_TYPE(Class, Base) 778#include "clang/AST/TypeNodes.def" 779 TagFirst = Record, TagLast = Enum 780 }; 781 782private: 783 Type(const Type&); // DO NOT IMPLEMENT. 784 void operator=(const Type&); // DO NOT IMPLEMENT. 785 786 QualType CanonicalType; 787 788 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 789 unsigned TC : 8; 790 791 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 792 /// Note that this should stay at the end of the ivars for Type so that 793 /// subclasses can pack their bitfields into the same word. 794 bool Dependent : 1; 795 796 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 797 bool VariablyModified : 1; 798 799 /// \brief Whether the linkage of this type along with the presence of any 800 /// local or unnamed types is already known. 801 mutable bool LinkageKnown : 1; 802 803 /// \brief Linkage of this type. 804 mutable unsigned CachedLinkage : 2; 805 806 /// \brief Whether this type involves and local or unnamed types. 807 mutable bool CachedLocalOrUnnamed : 1; 808 809 /// \brief FromAST - Whether this type comes from an AST file. 810 mutable bool FromAST : 1; 811 812 unsigned SpareBit : 1; 813 814 /// \brief Set whether this type comes from an AST file. 815 void setFromAST(bool V = true) const { 816 FromAST = V; 817 } 818 819protected: 820 /// \brief Compute the linkage of this type along with the presence of 821 /// any local or unnamed types. 822 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 823 824 unsigned SubclassBits : 16; 825 826#define BITFIELD(Name, Previous, N) \ 827 static unsigned Encode##Name(unsigned V) { \ 828 assert(!((V << Name##Offset) & ~Name##Mask) && \ 829 #Name " value out of range"); \ 830 return (V << Name##Offset); \ 831 } \ 832 static unsigned Decode##Name(unsigned Bits) { \ 833 return (Bits & Name##Mask) >> Name##Offset; \ 834 } \ 835 enum { \ 836 Name##Width = (N), \ 837 Name##Offset = Previous##Offset + Previous##Width, \ 838 Name##Mask = ((1 << (N)) - 1) << Name##Offset \ 839 } 840#define BOOL_BITFIELD(Name, Previous) \ 841 static unsigned Encode##Name(bool V) { \ 842 return (V ? Name##Mask : 0); \ 843 } \ 844 static bool Decode##Name(unsigned Bits) { \ 845 return (Bits & Name##Mask) != 0; \ 846 } \ 847 enum { \ 848 Name##Width = 1, \ 849 Name##Offset = Previous##Offset + Previous##Width, \ 850 Name##Mask = 1 << Name##Offset \ 851 } 852#define InitialBitfieldWidth 0 853#define InitialBitfieldOffset 0 854 855 // silence VC++ warning C4355: 'this' : used in base member initializer list 856 Type *this_() { return this; } 857 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified) 858 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 859 TC(tc), Dependent(Dependent), VariablyModified(VariablyModified), 860 LinkageKnown(false), 861 CachedLinkage(NoLinkage), FromAST(false) {} 862 virtual ~Type(); 863 friend class ASTContext; 864 865 void setDependent(bool D = true) { Dependent = D; } 866 void setVariablyModified(bool VM = true) { VariablyModified = VM; } 867 868public: 869 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 870 871 /// \brief Whether this type comes from an AST file. 872 bool isFromAST() const { return FromAST; } 873 874 bool isCanonicalUnqualified() const { 875 return CanonicalType.getTypePtr() == this; 876 } 877 878 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 879 /// object types, function types, and incomplete types. 880 881 /// isIncompleteType - Return true if this is an incomplete type. 882 /// A type that can describe objects, but which lacks information needed to 883 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 884 /// routine will need to determine if the size is actually required. 885 bool isIncompleteType() const; 886 887 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 888 /// type, in other words, not a function type. 889 bool isIncompleteOrObjectType() const { 890 return !isFunctionType(); 891 } 892 893 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 894 bool isPODType() const; 895 896 /// isLiteralType - Return true if this is a literal type 897 /// (C++0x [basic.types]p10) 898 bool isLiteralType() const; 899 900 /// Helper methods to distinguish type categories. All type predicates 901 /// operate on the canonical type, ignoring typedefs and qualifiers. 902 903 /// isBuiltinType - returns true if the type is a builtin type. 904 bool isBuiltinType() const; 905 906 /// isSpecificBuiltinType - Test for a particular builtin type. 907 bool isSpecificBuiltinType(unsigned K) const; 908 909 /// isPlaceholderType - Test for a type which does not represent an 910 /// actual type-system type but is instead used as a placeholder for 911 /// various convenient purposes within Clang. All such types are 912 /// BuiltinTypes. 913 bool isPlaceholderType() const; 914 915 /// isIntegerType() does *not* include complex integers (a GCC extension). 916 /// isComplexIntegerType() can be used to test for complex integers. 917 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 918 bool isEnumeralType() const; 919 bool isBooleanType() const; 920 bool isCharType() const; 921 bool isWideCharType() const; 922 bool isAnyCharacterType() const; 923 bool isIntegralType(ASTContext &Ctx) const; 924 925 /// \brief Determine whether this type is an integral or enumeration type. 926 bool isIntegralOrEnumerationType() const; 927 /// \brief Determine whether this type is an integral or unscoped enumeration 928 /// type. 929 bool isIntegralOrUnscopedEnumerationType() const; 930 931 /// Floating point categories. 932 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 933 /// isComplexType() does *not* include complex integers (a GCC extension). 934 /// isComplexIntegerType() can be used to test for complex integers. 935 bool isComplexType() const; // C99 6.2.5p11 (complex) 936 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 937 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 938 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 939 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 940 bool isVoidType() const; // C99 6.2.5p19 941 bool isDerivedType() const; // C99 6.2.5p20 942 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 943 bool isAggregateType() const; 944 945 // Type Predicates: Check to see if this type is structurally the specified 946 // type, ignoring typedefs and qualifiers. 947 bool isFunctionType() const; 948 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 949 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 950 bool isPointerType() const; 951 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 952 bool isBlockPointerType() const; 953 bool isVoidPointerType() const; 954 bool isReferenceType() const; 955 bool isLValueReferenceType() const; 956 bool isRValueReferenceType() const; 957 bool isFunctionPointerType() const; 958 bool isMemberPointerType() const; 959 bool isMemberFunctionPointerType() const; 960 bool isMemberDataPointerType() const; 961 bool isArrayType() const; 962 bool isConstantArrayType() const; 963 bool isIncompleteArrayType() const; 964 bool isVariableArrayType() const; 965 bool isDependentSizedArrayType() const; 966 bool isRecordType() const; 967 bool isClassType() const; 968 bool isStructureType() const; 969 bool isStructureOrClassType() const; 970 bool isUnionType() const; 971 bool isComplexIntegerType() const; // GCC _Complex integer type. 972 bool isVectorType() const; // GCC vector type. 973 bool isExtVectorType() const; // Extended vector type. 974 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 975 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 976 // for the common case. 977 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 978 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 979 bool isObjCQualifiedIdType() const; // id<foo> 980 bool isObjCQualifiedClassType() const; // Class<foo> 981 bool isObjCObjectOrInterfaceType() const; 982 bool isObjCIdType() const; // id 983 bool isObjCClassType() const; // Class 984 bool isObjCSelType() const; // Class 985 bool isObjCBuiltinType() const; // 'id' or 'Class' 986 bool isTemplateTypeParmType() const; // C++ template type parameter 987 bool isNullPtrType() const; // C++0x nullptr_t 988 989 /// isDependentType - Whether this type is a dependent type, meaning 990 /// that its definition somehow depends on a template parameter 991 /// (C++ [temp.dep.type]). 992 bool isDependentType() const { return Dependent; } 993 994 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 995 bool isVariablyModifiedType() const { return VariablyModified; } 996 997 /// \brief Whether this type is or contains a local or unnamed type. 998 bool hasUnnamedOrLocalType() const; 999 1000 bool isOverloadableType() const; 1001 1002 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1003 bool isElaboratedTypeSpecifier() const; 1004 1005 /// hasPointerRepresentation - Whether this type is represented 1006 /// natively as a pointer; this includes pointers, references, block 1007 /// pointers, and Objective-C interface, qualified id, and qualified 1008 /// interface types, as well as nullptr_t. 1009 bool hasPointerRepresentation() const; 1010 1011 /// hasObjCPointerRepresentation - Whether this type can represent 1012 /// an objective pointer type for the purpose of GC'ability 1013 bool hasObjCPointerRepresentation() const; 1014 1015 /// \brief Determine whether this type has an integer representation 1016 /// of some sort, e.g., it is an integer type or a vector. 1017 bool hasIntegerRepresentation() const; 1018 1019 /// \brief Determine whether this type has an signed integer representation 1020 /// of some sort, e.g., it is an signed integer type or a vector. 1021 bool hasSignedIntegerRepresentation() const; 1022 1023 /// \brief Determine whether this type has an unsigned integer representation 1024 /// of some sort, e.g., it is an unsigned integer type or a vector. 1025 bool hasUnsignedIntegerRepresentation() const; 1026 1027 /// \brief Determine whether this type has a floating-point representation 1028 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1029 bool hasFloatingRepresentation() const; 1030 1031 // Type Checking Functions: Check to see if this type is structurally the 1032 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1033 // the best type we can. 1034 const RecordType *getAsStructureType() const; 1035 /// NOTE: getAs*ArrayType are methods on ASTContext. 1036 const RecordType *getAsUnionType() const; 1037 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1038 // The following is a convenience method that returns an ObjCObjectPointerType 1039 // for object declared using an interface. 1040 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1041 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1042 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1043 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1044 1045 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1046 /// because the type is a RecordType or because it is the injected-class-name 1047 /// type of a class template or class template partial specialization. 1048 CXXRecordDecl *getAsCXXRecordDecl() const; 1049 1050 // Member-template getAs<specific type>'. Look through sugar for 1051 // an instance of <specific type>. This scheme will eventually 1052 // replace the specific getAsXXXX methods above. 1053 // 1054 // There are some specializations of this member template listed 1055 // immediately following this class. 1056 template <typename T> const T *getAs() const; 1057 1058 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1059 /// element type of the array, potentially with type qualifiers missing. 1060 /// This method should never be used when type qualifiers are meaningful. 1061 const Type *getArrayElementTypeNoTypeQual() const; 1062 1063 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1064 /// pointer, this returns the respective pointee. 1065 QualType getPointeeType() const; 1066 1067 /// getUnqualifiedDesugaredType() - Return the specified type with 1068 /// any "sugar" removed from the type, removing any typedefs, 1069 /// typeofs, etc., as well as any qualifiers. 1070 const Type *getUnqualifiedDesugaredType() const; 1071 1072 /// More type predicates useful for type checking/promotion 1073 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1074 1075 /// isSignedIntegerType - Return true if this is an integer type that is 1076 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1077 /// an enum decl which has a signed representation, or a vector of signed 1078 /// integer element type. 1079 bool isSignedIntegerType() const; 1080 1081 /// isUnsignedIntegerType - Return true if this is an integer type that is 1082 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1083 /// decl which has an unsigned representation, or a vector of unsigned integer 1084 /// element type. 1085 bool isUnsignedIntegerType() const; 1086 1087 /// isConstantSizeType - Return true if this is not a variable sized type, 1088 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1089 /// incomplete types. 1090 bool isConstantSizeType() const; 1091 1092 /// isSpecifierType - Returns true if this type can be represented by some 1093 /// set of type specifiers. 1094 bool isSpecifierType() const; 1095 1096 /// \brief Determine the linkage of this type. 1097 Linkage getLinkage() const; 1098 1099 /// \brief Note that the linkage is no longer known. 1100 void ClearLinkageCache(); 1101 1102 const char *getTypeClassName() const; 1103 1104 QualType getCanonicalTypeInternal() const { 1105 return CanonicalType; 1106 } 1107 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1108 void dump() const; 1109 static bool classof(const Type *) { return true; } 1110 1111 friend class ASTReader; 1112 friend class ASTWriter; 1113}; 1114 1115template <> inline const TypedefType *Type::getAs() const { 1116 return dyn_cast<TypedefType>(this); 1117} 1118 1119// We can do canonical leaf types faster, because we don't have to 1120// worry about preserving child type decoration. 1121#define TYPE(Class, Base) 1122#define LEAF_TYPE(Class) \ 1123template <> inline const Class##Type *Type::getAs() const { \ 1124 return dyn_cast<Class##Type>(CanonicalType); \ 1125} 1126#include "clang/AST/TypeNodes.def" 1127 1128 1129/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1130/// types are always canonical and have a literal name field. 1131class BuiltinType : public Type { 1132public: 1133 enum Kind { 1134 Void, 1135 1136 Bool, // This is bool and/or _Bool. 1137 Char_U, // This is 'char' for targets where char is unsigned. 1138 UChar, // This is explicitly qualified unsigned char. 1139 Char16, // This is 'char16_t' for C++. 1140 Char32, // This is 'char32_t' for C++. 1141 UShort, 1142 UInt, 1143 ULong, 1144 ULongLong, 1145 UInt128, // __uint128_t 1146 1147 Char_S, // This is 'char' for targets where char is signed. 1148 SChar, // This is explicitly qualified signed char. 1149 WChar, // This is 'wchar_t' for C++. 1150 Short, 1151 Int, 1152 Long, 1153 LongLong, 1154 Int128, // __int128_t 1155 1156 Float, Double, LongDouble, 1157 1158 NullPtr, // This is the type of C++0x 'nullptr'. 1159 1160 /// This represents the type of an expression whose type is 1161 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1162 /// appear in situations where the structure of the type is 1163 /// theoretically deducible. 1164 Dependent, 1165 1166 Overload, // This represents the type of an overloaded function declaration. 1167 1168 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1169 // that has not been deduced yet. 1170 1171 /// The primitive Objective C 'id' type. The type pointed to by the 1172 /// user-visible 'id' type. Only ever shows up in an AST as the base 1173 /// type of an ObjCObjectType. 1174 ObjCId, 1175 1176 /// The primitive Objective C 'Class' type. The type pointed to by the 1177 /// user-visible 'Class' type. Only ever shows up in an AST as the 1178 /// base type of an ObjCObjectType. 1179 ObjCClass, 1180 1181 ObjCSel // This represents the ObjC 'SEL' type. 1182 }; 1183 1184 // SubclassBits stores a Kind. 1185 1186protected: 1187 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1188 1189public: 1190 BuiltinType(Kind K) 1191 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1192 /*VariablyModified=*/false) { 1193 SubclassBits = K; 1194 } 1195 1196 Kind getKind() const { return static_cast<Kind>(SubclassBits); } 1197 const char *getName(const LangOptions &LO) const; 1198 1199 bool isSugared() const { return false; } 1200 QualType desugar() const { return QualType(this, 0); } 1201 1202 bool isInteger() const { 1203 return getKind() >= Bool && getKind() <= Int128; 1204 } 1205 1206 bool isSignedInteger() const { 1207 return getKind() >= Char_S && getKind() <= Int128; 1208 } 1209 1210 bool isUnsignedInteger() const { 1211 return getKind() >= Bool && getKind() <= UInt128; 1212 } 1213 1214 bool isFloatingPoint() const { 1215 return getKind() >= Float && getKind() <= LongDouble; 1216 } 1217 1218 /// Determines whether this type is a "forbidden" placeholder type, 1219 /// i.e. a type which cannot appear in arbitrary positions in a 1220 /// fully-formed expression. 1221 bool isPlaceholderType() const { 1222 return getKind() == Overload || 1223 getKind() == UndeducedAuto; 1224 } 1225 1226 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1227 static bool classof(const BuiltinType *) { return true; } 1228}; 1229 1230/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1231/// types (_Complex float etc) as well as the GCC integer complex extensions. 1232/// 1233class ComplexType : public Type, public llvm::FoldingSetNode { 1234 QualType ElementType; 1235 ComplexType(QualType Element, QualType CanonicalPtr) : 1236 Type(Complex, CanonicalPtr, Element->isDependentType(), 1237 Element->isVariablyModifiedType()), 1238 ElementType(Element) { 1239 } 1240 friend class ASTContext; // ASTContext creates these. 1241 1242protected: 1243 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1244 1245public: 1246 QualType getElementType() const { return ElementType; } 1247 1248 bool isSugared() const { return false; } 1249 QualType desugar() const { return QualType(this, 0); } 1250 1251 void Profile(llvm::FoldingSetNodeID &ID) { 1252 Profile(ID, getElementType()); 1253 } 1254 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1255 ID.AddPointer(Element.getAsOpaquePtr()); 1256 } 1257 1258 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1259 static bool classof(const ComplexType *) { return true; } 1260}; 1261 1262/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1263/// 1264class PointerType : public Type, public llvm::FoldingSetNode { 1265 QualType PointeeType; 1266 1267 PointerType(QualType Pointee, QualType CanonicalPtr) : 1268 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1269 Pointee->isVariablyModifiedType()), 1270 PointeeType(Pointee) { 1271 } 1272 friend class ASTContext; // ASTContext creates these. 1273 1274protected: 1275 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1276 1277public: 1278 1279 QualType getPointeeType() const { return PointeeType; } 1280 1281 bool isSugared() const { return false; } 1282 QualType desugar() const { return QualType(this, 0); } 1283 1284 void Profile(llvm::FoldingSetNodeID &ID) { 1285 Profile(ID, getPointeeType()); 1286 } 1287 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1288 ID.AddPointer(Pointee.getAsOpaquePtr()); 1289 } 1290 1291 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1292 static bool classof(const PointerType *) { return true; } 1293}; 1294 1295/// BlockPointerType - pointer to a block type. 1296/// This type is to represent types syntactically represented as 1297/// "void (^)(int)", etc. Pointee is required to always be a function type. 1298/// 1299class BlockPointerType : public Type, public llvm::FoldingSetNode { 1300 QualType PointeeType; // Block is some kind of pointer type 1301 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1302 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1303 Pointee->isVariablyModifiedType()), 1304 PointeeType(Pointee) { 1305 } 1306 friend class ASTContext; // ASTContext creates these. 1307 1308protected: 1309 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1310 1311public: 1312 1313 // Get the pointee type. Pointee is required to always be a function type. 1314 QualType getPointeeType() const { return PointeeType; } 1315 1316 bool isSugared() const { return false; } 1317 QualType desugar() const { return QualType(this, 0); } 1318 1319 void Profile(llvm::FoldingSetNodeID &ID) { 1320 Profile(ID, getPointeeType()); 1321 } 1322 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1323 ID.AddPointer(Pointee.getAsOpaquePtr()); 1324 } 1325 1326 static bool classof(const Type *T) { 1327 return T->getTypeClass() == BlockPointer; 1328 } 1329 static bool classof(const BlockPointerType *) { return true; } 1330}; 1331 1332/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1333/// 1334class ReferenceType : public Type, public llvm::FoldingSetNode { 1335 QualType PointeeType; 1336 1337 /// True if the type was originally spelled with an lvalue sigil. 1338 /// This is never true of rvalue references but can also be false 1339 /// on lvalue references because of C++0x [dcl.typedef]p9, 1340 /// as follows: 1341 /// 1342 /// typedef int &ref; // lvalue, spelled lvalue 1343 /// typedef int &&rvref; // rvalue 1344 /// ref &a; // lvalue, inner ref, spelled lvalue 1345 /// ref &&a; // lvalue, inner ref 1346 /// rvref &a; // lvalue, inner ref, spelled lvalue 1347 /// rvref &&a; // rvalue, inner ref 1348 BOOL_BITFIELD(SpelledAsLValue, InitialBitfield); 1349 1350 /// True if the inner type is a reference type. This only happens 1351 /// in non-canonical forms. 1352 BOOL_BITFIELD(InnerRef, SpelledAsLValue); 1353 1354protected: 1355 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1356 bool SpelledAsLValue) : 1357 Type(tc, CanonicalRef, Referencee->isDependentType(), 1358 Referencee->isVariablyModifiedType()), PointeeType(Referencee) { 1359 SubclassBits = EncodeSpelledAsLValue(SpelledAsLValue) | 1360 EncodeInnerRef(Referencee->isReferenceType()); 1361 } 1362 1363 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1364 1365public: 1366 bool isSpelledAsLValue() const { return SubclassBits & SpelledAsLValueMask; } 1367 bool isInnerRef() const { return SubclassBits & InnerRefMask; } 1368 1369 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1370 QualType getPointeeType() const { 1371 // FIXME: this might strip inner qualifiers; okay? 1372 const ReferenceType *T = this; 1373 while (T->isInnerRef()) 1374 T = T->PointeeType->getAs<ReferenceType>(); 1375 return T->PointeeType; 1376 } 1377 1378 void Profile(llvm::FoldingSetNodeID &ID) { 1379 Profile(ID, PointeeType, isSpelledAsLValue()); 1380 } 1381 static void Profile(llvm::FoldingSetNodeID &ID, 1382 QualType Referencee, 1383 bool SpelledAsLValue) { 1384 ID.AddPointer(Referencee.getAsOpaquePtr()); 1385 ID.AddBoolean(SpelledAsLValue); 1386 } 1387 1388 static bool classof(const Type *T) { 1389 return T->getTypeClass() == LValueReference || 1390 T->getTypeClass() == RValueReference; 1391 } 1392 static bool classof(const ReferenceType *) { return true; } 1393}; 1394 1395/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1396/// 1397class LValueReferenceType : public ReferenceType { 1398 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1399 bool SpelledAsLValue) : 1400 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1401 {} 1402 friend class ASTContext; // ASTContext creates these 1403public: 1404 bool isSugared() const { return false; } 1405 QualType desugar() const { return QualType(this, 0); } 1406 1407 static bool classof(const Type *T) { 1408 return T->getTypeClass() == LValueReference; 1409 } 1410 static bool classof(const LValueReferenceType *) { return true; } 1411}; 1412 1413/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1414/// 1415class RValueReferenceType : public ReferenceType { 1416 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1417 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1418 } 1419 friend class ASTContext; // ASTContext creates these 1420public: 1421 bool isSugared() const { return false; } 1422 QualType desugar() const { return QualType(this, 0); } 1423 1424 static bool classof(const Type *T) { 1425 return T->getTypeClass() == RValueReference; 1426 } 1427 static bool classof(const RValueReferenceType *) { return true; } 1428}; 1429 1430/// MemberPointerType - C++ 8.3.3 - Pointers to members 1431/// 1432class MemberPointerType : public Type, public llvm::FoldingSetNode { 1433 QualType PointeeType; 1434 /// The class of which the pointee is a member. Must ultimately be a 1435 /// RecordType, but could be a typedef or a template parameter too. 1436 const Type *Class; 1437 1438 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1439 Type(MemberPointer, CanonicalPtr, 1440 Cls->isDependentType() || Pointee->isDependentType(), 1441 Pointee->isVariablyModifiedType()), 1442 PointeeType(Pointee), Class(Cls) { 1443 } 1444 friend class ASTContext; // ASTContext creates these. 1445 1446protected: 1447 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1448 1449public: 1450 QualType getPointeeType() const { return PointeeType; } 1451 1452 /// Returns true if the member type (i.e. the pointee type) is a 1453 /// function type rather than a data-member type. 1454 bool isMemberFunctionPointer() const { 1455 return PointeeType->isFunctionProtoType(); 1456 } 1457 1458 /// Returns true if the member type (i.e. the pointee type) is a 1459 /// data type rather than a function type. 1460 bool isMemberDataPointer() const { 1461 return !PointeeType->isFunctionProtoType(); 1462 } 1463 1464 const Type *getClass() const { return Class; } 1465 1466 bool isSugared() const { return false; } 1467 QualType desugar() const { return QualType(this, 0); } 1468 1469 void Profile(llvm::FoldingSetNodeID &ID) { 1470 Profile(ID, getPointeeType(), getClass()); 1471 } 1472 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1473 const Type *Class) { 1474 ID.AddPointer(Pointee.getAsOpaquePtr()); 1475 ID.AddPointer(Class); 1476 } 1477 1478 static bool classof(const Type *T) { 1479 return T->getTypeClass() == MemberPointer; 1480 } 1481 static bool classof(const MemberPointerType *) { return true; } 1482}; 1483 1484/// ArrayType - C99 6.7.5.2 - Array Declarators. 1485/// 1486class ArrayType : public Type, public llvm::FoldingSetNode { 1487public: 1488 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1489 /// an array with a static size (e.g. int X[static 4]), or an array 1490 /// with a star size (e.g. int X[*]). 1491 /// 'static' is only allowed on function parameters. 1492 enum ArraySizeModifier { 1493 Normal, Static, Star 1494 }; 1495private: 1496 /// ElementType - The element type of the array. 1497 QualType ElementType; 1498 1499 // IndexTypeQuals - Capture qualifiers in declarations like: 1500 // 'int X[static restrict 4]'. For function parameters only. 1501 enum { IndexTypeQualsMask = 0x7 }; 1502 1503 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1504 enum { SizeModifierMask = 0x18, SizeModifierOffset = 3 }; 1505 1506protected: 1507 // C++ [temp.dep.type]p1: 1508 // A type is dependent if it is... 1509 // - an array type constructed from any dependent type or whose 1510 // size is specified by a constant expression that is 1511 // value-dependent, 1512 ArrayType(TypeClass tc, QualType et, QualType can, 1513 ArraySizeModifier sm, unsigned tq) 1514 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1515 (tc == VariableArray || et->isVariablyModifiedType())), 1516 ElementType(et) { 1517 SubclassBits = tq | (static_cast<unsigned>(sm) << SizeModifierOffset); 1518 } 1519 1520 friend class ASTContext; // ASTContext creates these. 1521 1522 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1523 1524public: 1525 QualType getElementType() const { return ElementType; } 1526 ArraySizeModifier getSizeModifier() const { 1527 return ArraySizeModifier(SubclassBits >> SizeModifierOffset); 1528 } 1529 Qualifiers getIndexTypeQualifiers() const { 1530 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1531 } 1532 unsigned getIndexTypeCVRQualifiers() const { 1533 return SubclassBits & IndexTypeQualsMask; 1534 } 1535 1536 static bool classof(const Type *T) { 1537 return T->getTypeClass() == ConstantArray || 1538 T->getTypeClass() == VariableArray || 1539 T->getTypeClass() == IncompleteArray || 1540 T->getTypeClass() == DependentSizedArray; 1541 } 1542 static bool classof(const ArrayType *) { return true; } 1543}; 1544 1545/// ConstantArrayType - This class represents the canonical version of 1546/// C arrays with a specified constant size. For example, the canonical 1547/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1548/// type is 'int' and the size is 404. 1549class ConstantArrayType : public ArrayType { 1550 llvm::APInt Size; // Allows us to unique the type. 1551 1552 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1553 ArraySizeModifier sm, unsigned tq) 1554 : ArrayType(ConstantArray, et, can, sm, tq), 1555 Size(size) {} 1556protected: 1557 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1558 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1559 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1560 friend class ASTContext; // ASTContext creates these. 1561public: 1562 const llvm::APInt &getSize() const { return Size; } 1563 bool isSugared() const { return false; } 1564 QualType desugar() const { return QualType(this, 0); } 1565 1566 1567 /// \brief Determine the number of bits required to address a member of 1568 // an array with the given element type and number of elements. 1569 static unsigned getNumAddressingBits(ASTContext &Context, 1570 QualType ElementType, 1571 const llvm::APInt &NumElements); 1572 1573 /// \brief Determine the maximum number of active bits that an array's size 1574 /// can require, which limits the maximum size of the array. 1575 static unsigned getMaxSizeBits(ASTContext &Context); 1576 1577 void Profile(llvm::FoldingSetNodeID &ID) { 1578 Profile(ID, getElementType(), getSize(), 1579 getSizeModifier(), getIndexTypeCVRQualifiers()); 1580 } 1581 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1582 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1583 unsigned TypeQuals) { 1584 ID.AddPointer(ET.getAsOpaquePtr()); 1585 ID.AddInteger(ArraySize.getZExtValue()); 1586 ID.AddInteger(SizeMod); 1587 ID.AddInteger(TypeQuals); 1588 } 1589 static bool classof(const Type *T) { 1590 return T->getTypeClass() == ConstantArray; 1591 } 1592 static bool classof(const ConstantArrayType *) { return true; } 1593}; 1594 1595/// IncompleteArrayType - This class represents C arrays with an unspecified 1596/// size. For example 'int A[]' has an IncompleteArrayType where the element 1597/// type is 'int' and the size is unspecified. 1598class IncompleteArrayType : public ArrayType { 1599 1600 IncompleteArrayType(QualType et, QualType can, 1601 ArraySizeModifier sm, unsigned tq) 1602 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1603 friend class ASTContext; // ASTContext creates these. 1604public: 1605 bool isSugared() const { return false; } 1606 QualType desugar() const { return QualType(this, 0); } 1607 1608 static bool classof(const Type *T) { 1609 return T->getTypeClass() == IncompleteArray; 1610 } 1611 static bool classof(const IncompleteArrayType *) { return true; } 1612 1613 friend class StmtIteratorBase; 1614 1615 void Profile(llvm::FoldingSetNodeID &ID) { 1616 Profile(ID, getElementType(), getSizeModifier(), 1617 getIndexTypeCVRQualifiers()); 1618 } 1619 1620 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1621 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1622 ID.AddPointer(ET.getAsOpaquePtr()); 1623 ID.AddInteger(SizeMod); 1624 ID.AddInteger(TypeQuals); 1625 } 1626}; 1627 1628/// VariableArrayType - This class represents C arrays with a specified size 1629/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1630/// Since the size expression is an arbitrary expression, we store it as such. 1631/// 1632/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1633/// should not be: two lexically equivalent variable array types could mean 1634/// different things, for example, these variables do not have the same type 1635/// dynamically: 1636/// 1637/// void foo(int x) { 1638/// int Y[x]; 1639/// ++x; 1640/// int Z[x]; 1641/// } 1642/// 1643class VariableArrayType : public ArrayType { 1644 /// SizeExpr - An assignment expression. VLA's are only permitted within 1645 /// a function block. 1646 Stmt *SizeExpr; 1647 /// Brackets - The left and right array brackets. 1648 SourceRange Brackets; 1649 1650 VariableArrayType(QualType et, QualType can, Expr *e, 1651 ArraySizeModifier sm, unsigned tq, 1652 SourceRange brackets) 1653 : ArrayType(VariableArray, et, can, sm, tq), 1654 SizeExpr((Stmt*) e), Brackets(brackets) {} 1655 friend class ASTContext; // ASTContext creates these. 1656 1657public: 1658 Expr *getSizeExpr() const { 1659 // We use C-style casts instead of cast<> here because we do not wish 1660 // to have a dependency of Type.h on Stmt.h/Expr.h. 1661 return (Expr*) SizeExpr; 1662 } 1663 SourceRange getBracketsRange() const { return Brackets; } 1664 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1665 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1666 1667 bool isSugared() const { return false; } 1668 QualType desugar() const { return QualType(this, 0); } 1669 1670 static bool classof(const Type *T) { 1671 return T->getTypeClass() == VariableArray; 1672 } 1673 static bool classof(const VariableArrayType *) { return true; } 1674 1675 friend class StmtIteratorBase; 1676 1677 void Profile(llvm::FoldingSetNodeID &ID) { 1678 assert(0 && "Cannnot unique VariableArrayTypes."); 1679 } 1680}; 1681 1682/// DependentSizedArrayType - This type represents an array type in 1683/// C++ whose size is a value-dependent expression. For example: 1684/// 1685/// \code 1686/// template<typename T, int Size> 1687/// class array { 1688/// T data[Size]; 1689/// }; 1690/// \endcode 1691/// 1692/// For these types, we won't actually know what the array bound is 1693/// until template instantiation occurs, at which point this will 1694/// become either a ConstantArrayType or a VariableArrayType. 1695class DependentSizedArrayType : public ArrayType { 1696 ASTContext &Context; 1697 1698 /// \brief An assignment expression that will instantiate to the 1699 /// size of the array. 1700 /// 1701 /// The expression itself might be NULL, in which case the array 1702 /// type will have its size deduced from an initializer. 1703 Stmt *SizeExpr; 1704 1705 /// Brackets - The left and right array brackets. 1706 SourceRange Brackets; 1707 1708 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1709 Expr *e, ArraySizeModifier sm, unsigned tq, 1710 SourceRange brackets) 1711 : ArrayType(DependentSizedArray, et, can, sm, tq), 1712 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1713 friend class ASTContext; // ASTContext creates these. 1714 1715public: 1716 Expr *getSizeExpr() const { 1717 // We use C-style casts instead of cast<> here because we do not wish 1718 // to have a dependency of Type.h on Stmt.h/Expr.h. 1719 return (Expr*) SizeExpr; 1720 } 1721 SourceRange getBracketsRange() const { return Brackets; } 1722 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1723 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1724 1725 bool isSugared() const { return false; } 1726 QualType desugar() const { return QualType(this, 0); } 1727 1728 static bool classof(const Type *T) { 1729 return T->getTypeClass() == DependentSizedArray; 1730 } 1731 static bool classof(const DependentSizedArrayType *) { return true; } 1732 1733 friend class StmtIteratorBase; 1734 1735 1736 void Profile(llvm::FoldingSetNodeID &ID) { 1737 Profile(ID, Context, getElementType(), 1738 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1739 } 1740 1741 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1742 QualType ET, ArraySizeModifier SizeMod, 1743 unsigned TypeQuals, Expr *E); 1744}; 1745 1746/// DependentSizedExtVectorType - This type represent an extended vector type 1747/// where either the type or size is dependent. For example: 1748/// @code 1749/// template<typename T, int Size> 1750/// class vector { 1751/// typedef T __attribute__((ext_vector_type(Size))) type; 1752/// } 1753/// @endcode 1754class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1755 ASTContext &Context; 1756 Expr *SizeExpr; 1757 /// ElementType - The element type of the array. 1758 QualType ElementType; 1759 SourceLocation loc; 1760 1761 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1762 QualType can, Expr *SizeExpr, SourceLocation loc) 1763 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 1764 ElementType->isVariablyModifiedType()), 1765 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1766 loc(loc) {} 1767 friend class ASTContext; 1768 1769public: 1770 Expr *getSizeExpr() const { return SizeExpr; } 1771 QualType getElementType() const { return ElementType; } 1772 SourceLocation getAttributeLoc() const { return loc; } 1773 1774 bool isSugared() const { return false; } 1775 QualType desugar() const { return QualType(this, 0); } 1776 1777 static bool classof(const Type *T) { 1778 return T->getTypeClass() == DependentSizedExtVector; 1779 } 1780 static bool classof(const DependentSizedExtVectorType *) { return true; } 1781 1782 void Profile(llvm::FoldingSetNodeID &ID) { 1783 Profile(ID, Context, getElementType(), getSizeExpr()); 1784 } 1785 1786 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1787 QualType ElementType, Expr *SizeExpr); 1788}; 1789 1790 1791/// VectorType - GCC generic vector type. This type is created using 1792/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1793/// bytes; or from an Altivec __vector or vector declaration. 1794/// Since the constructor takes the number of vector elements, the 1795/// client is responsible for converting the size into the number of elements. 1796class VectorType : public Type, public llvm::FoldingSetNode { 1797public: 1798 enum AltiVecSpecific { 1799 NotAltiVec, // is not AltiVec vector 1800 AltiVec, // is AltiVec vector 1801 Pixel, // is AltiVec 'vector Pixel' 1802 Bool // is AltiVec 'vector bool ...' 1803 }; 1804protected: 1805 /// ElementType - The element type of the vector. 1806 QualType ElementType; 1807 1808 // NumElements - The number of elements in the vector. 1809 enum { NumElementsOffset = 2 }; 1810 1811 // AltiVecSpec 1812 enum { AltiVecSpecMask = 0x3 }; 1813 1814 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1815 AltiVecSpecific altiVecSpec) : 1816 Type(Vector, canonType, vecType->isDependentType(), 1817 vecType->isVariablyModifiedType()), ElementType(vecType) { 1818 SubclassBits = (nElements << NumElementsOffset) | 1819 static_cast<unsigned>(altiVecSpec); 1820 } 1821 1822 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1823 QualType canonType, AltiVecSpecific altiVecSpec) 1824 : Type(tc, canonType, vecType->isDependentType(), 1825 vecType->isVariablyModifiedType()), ElementType(vecType) { 1826 SubclassBits = (nElements << NumElementsOffset) | 1827 static_cast<unsigned>(altiVecSpec); 1828 } 1829 friend class ASTContext; // ASTContext creates these. 1830 1831 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1832 1833public: 1834 1835 QualType getElementType() const { return ElementType; } 1836 unsigned getNumElements() const { return SubclassBits >> NumElementsOffset; } 1837 1838 bool isSugared() const { return false; } 1839 QualType desugar() const { return QualType(this, 0); } 1840 1841 AltiVecSpecific getAltiVecSpecific() const { 1842 return AltiVecSpecific(SubclassBits & AltiVecSpecMask); 1843 } 1844 1845 void Profile(llvm::FoldingSetNodeID &ID) { 1846 Profile(ID, getElementType(), getNumElements(), 1847 getTypeClass(), getAltiVecSpecific()); 1848 } 1849 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1850 unsigned NumElements, TypeClass TypeClass, 1851 AltiVecSpecific AltiVecSpec) { 1852 ID.AddPointer(ElementType.getAsOpaquePtr()); 1853 ID.AddInteger(NumElements); 1854 ID.AddInteger(TypeClass); 1855 ID.AddInteger(AltiVecSpec); 1856 } 1857 1858 static bool classof(const Type *T) { 1859 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1860 } 1861 static bool classof(const VectorType *) { return true; } 1862}; 1863 1864/// ExtVectorType - Extended vector type. This type is created using 1865/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1866/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1867/// class enables syntactic extensions, like Vector Components for accessing 1868/// points, colors, and textures (modeled after OpenGL Shading Language). 1869class ExtVectorType : public VectorType { 1870 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1871 VectorType(ExtVector, vecType, nElements, canonType, NotAltiVec) {} 1872 friend class ASTContext; // ASTContext creates these. 1873public: 1874 static int getPointAccessorIdx(char c) { 1875 switch (c) { 1876 default: return -1; 1877 case 'x': return 0; 1878 case 'y': return 1; 1879 case 'z': return 2; 1880 case 'w': return 3; 1881 } 1882 } 1883 static int getNumericAccessorIdx(char c) { 1884 switch (c) { 1885 default: return -1; 1886 case '0': return 0; 1887 case '1': return 1; 1888 case '2': return 2; 1889 case '3': return 3; 1890 case '4': return 4; 1891 case '5': return 5; 1892 case '6': return 6; 1893 case '7': return 7; 1894 case '8': return 8; 1895 case '9': return 9; 1896 case 'A': 1897 case 'a': return 10; 1898 case 'B': 1899 case 'b': return 11; 1900 case 'C': 1901 case 'c': return 12; 1902 case 'D': 1903 case 'd': return 13; 1904 case 'E': 1905 case 'e': return 14; 1906 case 'F': 1907 case 'f': return 15; 1908 } 1909 } 1910 1911 static int getAccessorIdx(char c) { 1912 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1913 return getNumericAccessorIdx(c); 1914 } 1915 1916 bool isAccessorWithinNumElements(char c) const { 1917 if (int idx = getAccessorIdx(c)+1) 1918 return unsigned(idx-1) < getNumElements(); 1919 return false; 1920 } 1921 bool isSugared() const { return false; } 1922 QualType desugar() const { return QualType(this, 0); } 1923 1924 static bool classof(const Type *T) { 1925 return T->getTypeClass() == ExtVector; 1926 } 1927 static bool classof(const ExtVectorType *) { return true; } 1928}; 1929 1930/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1931/// class of FunctionNoProtoType and FunctionProtoType. 1932/// 1933class FunctionType : public Type { 1934 virtual void ANCHOR(); // Key function for FunctionType. 1935 1936 /// CallConv - The calling convention used by the function, as specified via 1937 /// __attribute__((cdecl|stdcall|fastcall|thiscall|pascal)). 1938 BITFIELD(CallConv, InitialBitfield, 3); 1939 1940 /// NoReturn - Indicates if the function type has __attribute__((noreturn)). 1941 BOOL_BITFIELD(NoReturn, CallConv); 1942 1943 /// RegParm - How many arguments to pass inreg. 1944 /// The value passed to __attribute__((regparm(x))) 1945 BITFIELD(RegParm, NoReturn, 3); 1946 1947 BITFIELD(ExtInfo, InitialBitfield, 1948 CallConvWidth + NoReturnWidth + RegParmWidth); 1949 1950 /// SubclassInfo 1951 BOOL_BITFIELD(SubclassInfo, RegParm); 1952 1953 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1954 /// other bitfields. 1955 /// The qualifiers are part of FunctionProtoType because... 1956 /// 1957 /// C++ 8.3.5p4: The return type, the parameter type list and the 1958 /// cv-qualifier-seq, [...], are part of the function type. 1959 BITFIELD(TypeQuals, SubclassInfo, 3); 1960 1961 // The type returned by the function. 1962 QualType ResultType; 1963 1964 public: 1965 // This class is used for passing arround the information needed to 1966 // construct a call. It is not actually used for storage, just for 1967 // factoring together common arguments. 1968 // If you add a field (say Foo), other than the obvious places (both, constructors, 1969 // compile failures), what you need to update is 1970 // * Operetor== 1971 // * getFoo 1972 // * withFoo 1973 // * functionType. Add Foo, getFoo. 1974 // * ASTContext::getFooType 1975 // * ASTContext::mergeFunctionTypes 1976 // * FunctionNoProtoType::Profile 1977 // * FunctionProtoType::Profile 1978 // * TypePrinter::PrintFunctionProto 1979 // * AST read and write 1980 // * Codegen 1981 1982 class ExtInfo { 1983 /// Laid out the same way as they are on FunctionType. 1984 unsigned Bits; 1985 1986 ExtInfo(unsigned Bits) : Bits(Bits) {} 1987 1988 friend class FunctionType; 1989 1990 public: 1991 // Constructor with no defaults. Use this when you know that you 1992 // have all the elements (when reading an AST file for example). 1993 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 1994 Bits = EncodeCallConv(cc) | 1995 EncodeNoReturn(noReturn) | 1996 EncodeRegParm(regParm); 1997 } 1998 1999 // Constructor with all defaults. Use when for example creating a 2000 // function know to use defaults. 2001 ExtInfo() : Bits(0) {} 2002 2003 bool getNoReturn() const { return DecodeNoReturn(Bits); } 2004 unsigned getRegParm() const { return DecodeRegParm(Bits); } 2005 CallingConv getCC() const { return CallingConv(DecodeCallConv(Bits)); } 2006 2007 bool operator==(ExtInfo Other) const { 2008 return Bits == Other.Bits; 2009 } 2010 bool operator!=(ExtInfo Other) const { 2011 return Bits != Other.Bits; 2012 } 2013 2014 // Note that we don't have setters. That is by design, use 2015 // the following with methods instead of mutating these objects. 2016 2017 ExtInfo withNoReturn(bool noReturn) const { 2018 if (noReturn) 2019 return ExtInfo(Bits | NoReturnMask); 2020 else 2021 return ExtInfo(Bits & ~NoReturnMask); 2022 } 2023 2024 ExtInfo withRegParm(unsigned RegParm) const { 2025 return ExtInfo((Bits & ~RegParmMask) | EncodeRegParm(RegParm)); 2026 } 2027 2028 ExtInfo withCallingConv(CallingConv cc) const { 2029 return ExtInfo((Bits & ~CallConvMask) | EncodeCallConv(cc)); 2030 } 2031 2032 void Profile(llvm::FoldingSetNodeID &ID) { 2033 ID.AddInteger(Bits); 2034 } 2035 }; 2036 2037protected: 2038 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 2039 unsigned typeQuals, QualType Canonical, bool Dependent, 2040 bool VariablyModified, ExtInfo Info) 2041 : Type(tc, Canonical, Dependent, VariablyModified), ResultType(res) { 2042 SubclassBits = EncodeExtInfo(Info.Bits) | 2043 EncodeSubclassInfo(SubclassInfo) | 2044 EncodeTypeQuals(typeQuals); 2045 } 2046 bool getSubClassData() const { return DecodeSubclassInfo(SubclassBits); } 2047 unsigned getTypeQuals() const { return DecodeTypeQuals(SubclassBits); } 2048public: 2049 2050 QualType getResultType() const { return ResultType; } 2051 2052 unsigned getRegParmType() const { 2053 return DecodeRegParm(SubclassBits); 2054 } 2055 bool getNoReturnAttr() const { 2056 return DecodeNoReturn(SubclassBits); 2057 } 2058 CallingConv getCallConv() const { 2059 return static_cast<CallingConv>(DecodeCallConv(SubclassBits)); 2060 } 2061 ExtInfo getExtInfo() const { 2062 return ExtInfo(DecodeExtInfo(SubclassBits)); 2063 } 2064 2065 /// \brief Determine the type of an expression that calls a function of 2066 /// this type. 2067 QualType getCallResultType(ASTContext &Context) const { 2068 return getResultType().getNonLValueExprType(Context); 2069 } 2070 2071 static llvm::StringRef getNameForCallConv(CallingConv CC); 2072 2073 static bool classof(const Type *T) { 2074 return T->getTypeClass() == FunctionNoProto || 2075 T->getTypeClass() == FunctionProto; 2076 } 2077 static bool classof(const FunctionType *) { return true; } 2078}; 2079 2080/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2081/// no information available about its arguments. 2082class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2083 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2084 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2085 /*Dependent=*/false, Result->isVariablyModifiedType(), 2086 Info) {} 2087 friend class ASTContext; // ASTContext creates these. 2088 2089protected: 2090 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 2091 2092public: 2093 // No additional state past what FunctionType provides. 2094 2095 bool isSugared() const { return false; } 2096 QualType desugar() const { return QualType(this, 0); } 2097 2098 void Profile(llvm::FoldingSetNodeID &ID) { 2099 Profile(ID, getResultType(), getExtInfo()); 2100 } 2101 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2102 ExtInfo Info) { 2103 Info.Profile(ID); 2104 ID.AddPointer(ResultType.getAsOpaquePtr()); 2105 } 2106 2107 static bool classof(const Type *T) { 2108 return T->getTypeClass() == FunctionNoProto; 2109 } 2110 static bool classof(const FunctionNoProtoType *) { return true; } 2111}; 2112 2113/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2114/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2115/// arguments, not as having a single void argument. Such a type can have an 2116/// exception specification, but this specification is not part of the canonical 2117/// type. 2118class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2119 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2120 bool isVariadic, unsigned typeQuals, bool hasExs, 2121 bool hasAnyExs, const QualType *ExArray, 2122 unsigned numExs, QualType Canonical, 2123 const ExtInfo &Info); 2124 2125 /// NumArgs - The number of arguments this function has, not counting '...'. 2126 unsigned NumArgs : 20; 2127 2128 /// NumExceptions - The number of types in the exception spec, if any. 2129 unsigned NumExceptions : 10; 2130 2131 /// HasExceptionSpec - Whether this function has an exception spec at all. 2132 bool HasExceptionSpec : 1; 2133 2134 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2135 bool AnyExceptionSpec : 1; 2136 2137 /// ArgInfo - There is an variable size array after the class in memory that 2138 /// holds the argument types. 2139 2140 /// Exceptions - There is another variable size array after ArgInfo that 2141 /// holds the exception types. 2142 2143 friend class ASTContext; // ASTContext creates these. 2144 2145protected: 2146 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 2147 2148public: 2149 unsigned getNumArgs() const { return NumArgs; } 2150 QualType getArgType(unsigned i) const { 2151 assert(i < NumArgs && "Invalid argument number!"); 2152 return arg_type_begin()[i]; 2153 } 2154 2155 bool hasExceptionSpec() const { return HasExceptionSpec; } 2156 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2157 unsigned getNumExceptions() const { return NumExceptions; } 2158 QualType getExceptionType(unsigned i) const { 2159 assert(i < NumExceptions && "Invalid exception number!"); 2160 return exception_begin()[i]; 2161 } 2162 bool hasEmptyExceptionSpec() const { 2163 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2164 getNumExceptions() == 0; 2165 } 2166 2167 bool isVariadic() const { return getSubClassData(); } 2168 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2169 2170 typedef const QualType *arg_type_iterator; 2171 arg_type_iterator arg_type_begin() const { 2172 return reinterpret_cast<const QualType *>(this+1); 2173 } 2174 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2175 2176 typedef const QualType *exception_iterator; 2177 exception_iterator exception_begin() const { 2178 // exceptions begin where arguments end 2179 return arg_type_end(); 2180 } 2181 exception_iterator exception_end() const { 2182 return exception_begin() + NumExceptions; 2183 } 2184 2185 bool isSugared() const { return false; } 2186 QualType desugar() const { return QualType(this, 0); } 2187 2188 static bool classof(const Type *T) { 2189 return T->getTypeClass() == FunctionProto; 2190 } 2191 static bool classof(const FunctionProtoType *) { return true; } 2192 2193 void Profile(llvm::FoldingSetNodeID &ID); 2194 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2195 arg_type_iterator ArgTys, unsigned NumArgs, 2196 bool isVariadic, unsigned TypeQuals, 2197 bool hasExceptionSpec, bool anyExceptionSpec, 2198 unsigned NumExceptions, exception_iterator Exs, 2199 ExtInfo ExtInfo); 2200}; 2201 2202 2203/// \brief Represents the dependent type named by a dependently-scoped 2204/// typename using declaration, e.g. 2205/// using typename Base<T>::foo; 2206/// Template instantiation turns these into the underlying type. 2207class UnresolvedUsingType : public Type { 2208 UnresolvedUsingTypenameDecl *Decl; 2209 2210 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2211 : Type(UnresolvedUsing, QualType(), true, false), 2212 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2213 friend class ASTContext; // ASTContext creates these. 2214public: 2215 2216 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2217 2218 bool isSugared() const { return false; } 2219 QualType desugar() const { return QualType(this, 0); } 2220 2221 static bool classof(const Type *T) { 2222 return T->getTypeClass() == UnresolvedUsing; 2223 } 2224 static bool classof(const UnresolvedUsingType *) { return true; } 2225 2226 void Profile(llvm::FoldingSetNodeID &ID) { 2227 return Profile(ID, Decl); 2228 } 2229 static void Profile(llvm::FoldingSetNodeID &ID, 2230 UnresolvedUsingTypenameDecl *D) { 2231 ID.AddPointer(D); 2232 } 2233}; 2234 2235 2236class TypedefType : public Type { 2237 TypedefDecl *Decl; 2238protected: 2239 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2240 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType()), 2241 Decl(const_cast<TypedefDecl*>(D)) { 2242 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2243 } 2244 friend class ASTContext; // ASTContext creates these. 2245public: 2246 2247 TypedefDecl *getDecl() const { return Decl; } 2248 2249 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2250 /// potentially looking through *all* consecutive typedefs. This returns the 2251 /// sum of the type qualifiers, so if you have: 2252 /// typedef const int A; 2253 /// typedef volatile A B; 2254 /// looking through the typedefs for B will give you "const volatile A". 2255 QualType LookThroughTypedefs() const; 2256 2257 bool isSugared() const { return true; } 2258 QualType desugar() const; 2259 2260 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2261 static bool classof(const TypedefType *) { return true; } 2262}; 2263 2264/// TypeOfExprType (GCC extension). 2265class TypeOfExprType : public Type { 2266 Expr *TOExpr; 2267 2268protected: 2269 TypeOfExprType(Expr *E, QualType can = QualType()); 2270 friend class ASTContext; // ASTContext creates these. 2271public: 2272 Expr *getUnderlyingExpr() const { return TOExpr; } 2273 2274 /// \brief Remove a single level of sugar. 2275 QualType desugar() const; 2276 2277 /// \brief Returns whether this type directly provides sugar. 2278 bool isSugared() const { return true; } 2279 2280 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2281 static bool classof(const TypeOfExprType *) { return true; } 2282}; 2283 2284/// \brief Internal representation of canonical, dependent 2285/// typeof(expr) types. 2286/// 2287/// This class is used internally by the ASTContext to manage 2288/// canonical, dependent types, only. Clients will only see instances 2289/// of this class via TypeOfExprType nodes. 2290class DependentTypeOfExprType 2291 : public TypeOfExprType, public llvm::FoldingSetNode { 2292 ASTContext &Context; 2293 2294public: 2295 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2296 : TypeOfExprType(E), Context(Context) { } 2297 2298 bool isSugared() const { return false; } 2299 QualType desugar() const { return QualType(this, 0); } 2300 2301 void Profile(llvm::FoldingSetNodeID &ID) { 2302 Profile(ID, Context, getUnderlyingExpr()); 2303 } 2304 2305 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2306 Expr *E); 2307}; 2308 2309/// TypeOfType (GCC extension). 2310class TypeOfType : public Type { 2311 QualType TOType; 2312 TypeOfType(QualType T, QualType can) 2313 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType()), 2314 TOType(T) { 2315 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2316 } 2317 friend class ASTContext; // ASTContext creates these. 2318public: 2319 QualType getUnderlyingType() const { return TOType; } 2320 2321 /// \brief Remove a single level of sugar. 2322 QualType desugar() const { return getUnderlyingType(); } 2323 2324 /// \brief Returns whether this type directly provides sugar. 2325 bool isSugared() const { return true; } 2326 2327 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2328 static bool classof(const TypeOfType *) { return true; } 2329}; 2330 2331/// DecltypeType (C++0x) 2332class DecltypeType : public Type { 2333 Expr *E; 2334 2335 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2336 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2337 // from it. 2338 QualType UnderlyingType; 2339 2340protected: 2341 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2342 friend class ASTContext; // ASTContext creates these. 2343public: 2344 Expr *getUnderlyingExpr() const { return E; } 2345 QualType getUnderlyingType() const { return UnderlyingType; } 2346 2347 /// \brief Remove a single level of sugar. 2348 QualType desugar() const { return getUnderlyingType(); } 2349 2350 /// \brief Returns whether this type directly provides sugar. 2351 bool isSugared() const { return !isDependentType(); } 2352 2353 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2354 static bool classof(const DecltypeType *) { return true; } 2355}; 2356 2357/// \brief Internal representation of canonical, dependent 2358/// decltype(expr) types. 2359/// 2360/// This class is used internally by the ASTContext to manage 2361/// canonical, dependent types, only. Clients will only see instances 2362/// of this class via DecltypeType nodes. 2363class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2364 ASTContext &Context; 2365 2366public: 2367 DependentDecltypeType(ASTContext &Context, Expr *E); 2368 2369 bool isSugared() const { return false; } 2370 QualType desugar() const { return QualType(this, 0); } 2371 2372 void Profile(llvm::FoldingSetNodeID &ID) { 2373 Profile(ID, Context, getUnderlyingExpr()); 2374 } 2375 2376 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2377 Expr *E); 2378}; 2379 2380class TagType : public Type { 2381 /// Stores the TagDecl associated with this type. The decl may point to any 2382 /// TagDecl that declares the entity. 2383 TagDecl * decl; 2384 2385protected: 2386 TagType(TypeClass TC, const TagDecl *D, QualType can); 2387 2388 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 2389 2390public: 2391 TagDecl *getDecl() const; 2392 2393 /// @brief Determines whether this type is in the process of being 2394 /// defined. 2395 bool isBeingDefined() const; 2396 2397 static bool classof(const Type *T) { 2398 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2399 } 2400 static bool classof(const TagType *) { return true; } 2401 static bool classof(const RecordType *) { return true; } 2402 static bool classof(const EnumType *) { return true; } 2403}; 2404 2405/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2406/// to detect TagType objects of structs/unions/classes. 2407class RecordType : public TagType { 2408protected: 2409 explicit RecordType(const RecordDecl *D) 2410 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2411 explicit RecordType(TypeClass TC, RecordDecl *D) 2412 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2413 friend class ASTContext; // ASTContext creates these. 2414public: 2415 2416 RecordDecl *getDecl() const { 2417 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2418 } 2419 2420 // FIXME: This predicate is a helper to QualType/Type. It needs to 2421 // recursively check all fields for const-ness. If any field is declared 2422 // const, it needs to return false. 2423 bool hasConstFields() const { return false; } 2424 2425 // FIXME: RecordType needs to check when it is created that all fields are in 2426 // the same address space, and return that. 2427 unsigned getAddressSpace() const { return 0; } 2428 2429 bool isSugared() const { return false; } 2430 QualType desugar() const { return QualType(this, 0); } 2431 2432 static bool classof(const TagType *T); 2433 static bool classof(const Type *T) { 2434 return isa<TagType>(T) && classof(cast<TagType>(T)); 2435 } 2436 static bool classof(const RecordType *) { return true; } 2437}; 2438 2439/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2440/// to detect TagType objects of enums. 2441class EnumType : public TagType { 2442 explicit EnumType(const EnumDecl *D) 2443 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2444 friend class ASTContext; // ASTContext creates these. 2445public: 2446 2447 EnumDecl *getDecl() const { 2448 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2449 } 2450 2451 bool isSugared() const { return false; } 2452 QualType desugar() const { return QualType(this, 0); } 2453 2454 static bool classof(const TagType *T); 2455 static bool classof(const Type *T) { 2456 return isa<TagType>(T) && classof(cast<TagType>(T)); 2457 } 2458 static bool classof(const EnumType *) { return true; } 2459}; 2460 2461class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2462 unsigned Depth : 15; 2463 unsigned Index : 16; 2464 unsigned ParameterPack : 1; 2465 IdentifierInfo *Name; 2466 2467 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2468 QualType Canon) 2469 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2470 /*VariablyModified=*/false), 2471 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2472 2473 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2474 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2475 /*VariablyModified=*/false), 2476 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2477 2478 friend class ASTContext; // ASTContext creates these 2479 2480public: 2481 unsigned getDepth() const { return Depth; } 2482 unsigned getIndex() const { return Index; } 2483 bool isParameterPack() const { return ParameterPack; } 2484 IdentifierInfo *getName() const { return Name; } 2485 2486 bool isSugared() const { return false; } 2487 QualType desugar() const { return QualType(this, 0); } 2488 2489 void Profile(llvm::FoldingSetNodeID &ID) { 2490 Profile(ID, Depth, Index, ParameterPack, Name); 2491 } 2492 2493 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2494 unsigned Index, bool ParameterPack, 2495 IdentifierInfo *Name) { 2496 ID.AddInteger(Depth); 2497 ID.AddInteger(Index); 2498 ID.AddBoolean(ParameterPack); 2499 ID.AddPointer(Name); 2500 } 2501 2502 static bool classof(const Type *T) { 2503 return T->getTypeClass() == TemplateTypeParm; 2504 } 2505 static bool classof(const TemplateTypeParmType *T) { return true; } 2506}; 2507 2508/// \brief Represents the result of substituting a type for a template 2509/// type parameter. 2510/// 2511/// Within an instantiated template, all template type parameters have 2512/// been replaced with these. They are used solely to record that a 2513/// type was originally written as a template type parameter; 2514/// therefore they are never canonical. 2515class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2516 // The original type parameter. 2517 const TemplateTypeParmType *Replaced; 2518 2519 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2520 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2521 Canon->isVariablyModifiedType()), 2522 Replaced(Param) { } 2523 2524 friend class ASTContext; 2525 2526public: 2527 IdentifierInfo *getName() const { return Replaced->getName(); } 2528 2529 /// Gets the template parameter that was substituted for. 2530 const TemplateTypeParmType *getReplacedParameter() const { 2531 return Replaced; 2532 } 2533 2534 /// Gets the type that was substituted for the template 2535 /// parameter. 2536 QualType getReplacementType() const { 2537 return getCanonicalTypeInternal(); 2538 } 2539 2540 bool isSugared() const { return true; } 2541 QualType desugar() const { return getReplacementType(); } 2542 2543 void Profile(llvm::FoldingSetNodeID &ID) { 2544 Profile(ID, getReplacedParameter(), getReplacementType()); 2545 } 2546 static void Profile(llvm::FoldingSetNodeID &ID, 2547 const TemplateTypeParmType *Replaced, 2548 QualType Replacement) { 2549 ID.AddPointer(Replaced); 2550 ID.AddPointer(Replacement.getAsOpaquePtr()); 2551 } 2552 2553 static bool classof(const Type *T) { 2554 return T->getTypeClass() == SubstTemplateTypeParm; 2555 } 2556 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2557}; 2558 2559/// \brief Represents the type of a template specialization as written 2560/// in the source code. 2561/// 2562/// Template specialization types represent the syntactic form of a 2563/// template-id that refers to a type, e.g., @c vector<int>. Some 2564/// template specialization types are syntactic sugar, whose canonical 2565/// type will point to some other type node that represents the 2566/// instantiation or class template specialization. For example, a 2567/// class template specialization type of @c vector<int> will refer to 2568/// a tag type for the instantiation 2569/// @c std::vector<int, std::allocator<int>>. 2570/// 2571/// Other template specialization types, for which the template name 2572/// is dependent, may be canonical types. These types are always 2573/// dependent. 2574class TemplateSpecializationType 2575 : public Type, public llvm::FoldingSetNode { 2576 /// \brief The name of the template being specialized. 2577 TemplateName Template; 2578 2579 /// \brief - The number of template arguments named in this class 2580 /// template specialization. 2581 unsigned NumArgs; 2582 2583 TemplateSpecializationType(TemplateName T, 2584 const TemplateArgument *Args, 2585 unsigned NumArgs, QualType Canon); 2586 2587 friend class ASTContext; // ASTContext creates these 2588 2589public: 2590 /// \brief Determine whether any of the given template arguments are 2591 /// dependent. 2592 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2593 unsigned NumArgs); 2594 2595 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2596 unsigned NumArgs); 2597 2598 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2599 2600 /// \brief Print a template argument list, including the '<' and '>' 2601 /// enclosing the template arguments. 2602 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2603 unsigned NumArgs, 2604 const PrintingPolicy &Policy); 2605 2606 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2607 unsigned NumArgs, 2608 const PrintingPolicy &Policy); 2609 2610 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2611 const PrintingPolicy &Policy); 2612 2613 /// True if this template specialization type matches a current 2614 /// instantiation in the context in which it is found. 2615 bool isCurrentInstantiation() const { 2616 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2617 } 2618 2619 typedef const TemplateArgument * iterator; 2620 2621 iterator begin() const { return getArgs(); } 2622 iterator end() const; // defined inline in TemplateBase.h 2623 2624 /// \brief Retrieve the name of the template that we are specializing. 2625 TemplateName getTemplateName() const { return Template; } 2626 2627 /// \brief Retrieve the template arguments. 2628 const TemplateArgument *getArgs() const { 2629 return reinterpret_cast<const TemplateArgument *>(this + 1); 2630 } 2631 2632 /// \brief Retrieve the number of template arguments. 2633 unsigned getNumArgs() const { return NumArgs; } 2634 2635 /// \brief Retrieve a specific template argument as a type. 2636 /// \precondition @c isArgType(Arg) 2637 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2638 2639 bool isSugared() const { 2640 return !isDependentType() || isCurrentInstantiation(); 2641 } 2642 QualType desugar() const { return getCanonicalTypeInternal(); } 2643 2644 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2645 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2646 } 2647 2648 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2649 const TemplateArgument *Args, 2650 unsigned NumArgs, 2651 ASTContext &Context); 2652 2653 static bool classof(const Type *T) { 2654 return T->getTypeClass() == TemplateSpecialization; 2655 } 2656 static bool classof(const TemplateSpecializationType *T) { return true; } 2657}; 2658 2659/// \brief The injected class name of a C++ class template or class 2660/// template partial specialization. Used to record that a type was 2661/// spelled with a bare identifier rather than as a template-id; the 2662/// equivalent for non-templated classes is just RecordType. 2663/// 2664/// Injected class name types are always dependent. Template 2665/// instantiation turns these into RecordTypes. 2666/// 2667/// Injected class name types are always canonical. This works 2668/// because it is impossible to compare an injected class name type 2669/// with the corresponding non-injected template type, for the same 2670/// reason that it is impossible to directly compare template 2671/// parameters from different dependent contexts: injected class name 2672/// types can only occur within the scope of a particular templated 2673/// declaration, and within that scope every template specialization 2674/// will canonicalize to the injected class name (when appropriate 2675/// according to the rules of the language). 2676class InjectedClassNameType : public Type { 2677 CXXRecordDecl *Decl; 2678 2679 /// The template specialization which this type represents. 2680 /// For example, in 2681 /// template <class T> class A { ... }; 2682 /// this is A<T>, whereas in 2683 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2684 /// this is A<B<X,Y> >. 2685 /// 2686 /// It is always unqualified, always a template specialization type, 2687 /// and always dependent. 2688 QualType InjectedType; 2689 2690 friend class ASTContext; // ASTContext creates these. 2691 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2692 // currently suitable for AST reading, too much 2693 // interdependencies. 2694 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2695 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2696 /*VariablyModified=*/false), 2697 Decl(D), InjectedType(TST) { 2698 assert(isa<TemplateSpecializationType>(TST)); 2699 assert(!TST.hasQualifiers()); 2700 assert(TST->isDependentType()); 2701 } 2702 2703public: 2704 QualType getInjectedSpecializationType() const { return InjectedType; } 2705 const TemplateSpecializationType *getInjectedTST() const { 2706 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2707 } 2708 2709 CXXRecordDecl *getDecl() const; 2710 2711 bool isSugared() const { return false; } 2712 QualType desugar() const { return QualType(this, 0); } 2713 2714 static bool classof(const Type *T) { 2715 return T->getTypeClass() == InjectedClassName; 2716 } 2717 static bool classof(const InjectedClassNameType *T) { return true; } 2718}; 2719 2720/// \brief The kind of a tag type. 2721enum TagTypeKind { 2722 /// \brief The "struct" keyword. 2723 TTK_Struct, 2724 /// \brief The "union" keyword. 2725 TTK_Union, 2726 /// \brief The "class" keyword. 2727 TTK_Class, 2728 /// \brief The "enum" keyword. 2729 TTK_Enum 2730}; 2731 2732/// \brief The elaboration keyword that precedes a qualified type name or 2733/// introduces an elaborated-type-specifier. 2734enum ElaboratedTypeKeyword { 2735 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2736 ETK_Struct, 2737 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2738 ETK_Union, 2739 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2740 ETK_Class, 2741 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2742 ETK_Enum, 2743 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2744 /// \c typename T::type. 2745 ETK_Typename, 2746 /// \brief No keyword precedes the qualified type name. 2747 ETK_None 2748}; 2749 2750/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2751/// The keyword in stored in the free bits of the base class. 2752/// Also provides a few static helpers for converting and printing 2753/// elaborated type keyword and tag type kind enumerations. 2754class TypeWithKeyword : public Type { 2755 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2756 unsigned Keyword : 3; 2757 2758protected: 2759 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2760 QualType Canonical, bool Dependent, bool VariablyModified) 2761 : Type(tc, Canonical, Dependent, VariablyModified), 2762 Keyword(Keyword) {} 2763 2764public: 2765 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2766 2767 ElaboratedTypeKeyword getKeyword() const { 2768 return static_cast<ElaboratedTypeKeyword>(Keyword); 2769 } 2770 2771 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2772 /// into an elaborated type keyword. 2773 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2774 2775 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2776 /// into a tag type kind. It is an error to provide a type specifier 2777 /// which *isn't* a tag kind here. 2778 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2779 2780 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2781 /// elaborated type keyword. 2782 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2783 2784 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2785 // a TagTypeKind. It is an error to provide an elaborated type keyword 2786 /// which *isn't* a tag kind here. 2787 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2788 2789 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2790 2791 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2792 2793 static const char *getTagTypeKindName(TagTypeKind Kind) { 2794 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2795 } 2796 2797 class CannotCastToThisType {}; 2798 static CannotCastToThisType classof(const Type *); 2799}; 2800 2801/// \brief Represents a type that was referred to using an elaborated type 2802/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2803/// or both. 2804/// 2805/// This type is used to keep track of a type name as written in the 2806/// source code, including tag keywords and any nested-name-specifiers. 2807/// The type itself is always "sugar", used to express what was written 2808/// in the source code but containing no additional semantic information. 2809class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2810 2811 /// \brief The nested name specifier containing the qualifier. 2812 NestedNameSpecifier *NNS; 2813 2814 /// \brief The type that this qualified name refers to. 2815 QualType NamedType; 2816 2817 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2818 QualType NamedType, QualType CanonType) 2819 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2820 NamedType->isDependentType(), 2821 NamedType->isVariablyModifiedType()), 2822 NNS(NNS), NamedType(NamedType) { 2823 assert(!(Keyword == ETK_None && NNS == 0) && 2824 "ElaboratedType cannot have elaborated type keyword " 2825 "and name qualifier both null."); 2826 } 2827 2828 friend class ASTContext; // ASTContext creates these 2829 2830public: 2831 ~ElaboratedType(); 2832 2833 /// \brief Retrieve the qualification on this type. 2834 NestedNameSpecifier *getQualifier() const { return NNS; } 2835 2836 /// \brief Retrieve the type named by the qualified-id. 2837 QualType getNamedType() const { return NamedType; } 2838 2839 /// \brief Remove a single level of sugar. 2840 QualType desugar() const { return getNamedType(); } 2841 2842 /// \brief Returns whether this type directly provides sugar. 2843 bool isSugared() const { return true; } 2844 2845 void Profile(llvm::FoldingSetNodeID &ID) { 2846 Profile(ID, getKeyword(), NNS, NamedType); 2847 } 2848 2849 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2850 NestedNameSpecifier *NNS, QualType NamedType) { 2851 ID.AddInteger(Keyword); 2852 ID.AddPointer(NNS); 2853 NamedType.Profile(ID); 2854 } 2855 2856 static bool classof(const Type *T) { 2857 return T->getTypeClass() == Elaborated; 2858 } 2859 static bool classof(const ElaboratedType *T) { return true; } 2860}; 2861 2862/// \brief Represents a qualified type name for which the type name is 2863/// dependent. 2864/// 2865/// DependentNameType represents a class of dependent types that involve a 2866/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2867/// name of a type. The DependentNameType may start with a "typename" (for a 2868/// typename-specifier), "class", "struct", "union", or "enum" (for a 2869/// dependent elaborated-type-specifier), or nothing (in contexts where we 2870/// know that we must be referring to a type, e.g., in a base class specifier). 2871class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2872 2873 /// \brief The nested name specifier containing the qualifier. 2874 NestedNameSpecifier *NNS; 2875 2876 /// \brief The type that this typename specifier refers to. 2877 const IdentifierInfo *Name; 2878 2879 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2880 const IdentifierInfo *Name, QualType CanonType) 2881 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 2882 /*VariablyModified=*/false), 2883 NNS(NNS), Name(Name) { 2884 assert(NNS->isDependent() && 2885 "DependentNameType requires a dependent nested-name-specifier"); 2886 } 2887 2888 friend class ASTContext; // ASTContext creates these 2889 2890public: 2891 virtual ~DependentNameType(); 2892 2893 /// \brief Retrieve the qualification on this type. 2894 NestedNameSpecifier *getQualifier() const { return NNS; } 2895 2896 /// \brief Retrieve the type named by the typename specifier as an 2897 /// identifier. 2898 /// 2899 /// This routine will return a non-NULL identifier pointer when the 2900 /// form of the original typename was terminated by an identifier, 2901 /// e.g., "typename T::type". 2902 const IdentifierInfo *getIdentifier() const { 2903 return Name; 2904 } 2905 2906 bool isSugared() const { return false; } 2907 QualType desugar() const { return QualType(this, 0); } 2908 2909 void Profile(llvm::FoldingSetNodeID &ID) { 2910 Profile(ID, getKeyword(), NNS, Name); 2911 } 2912 2913 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2914 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2915 ID.AddInteger(Keyword); 2916 ID.AddPointer(NNS); 2917 ID.AddPointer(Name); 2918 } 2919 2920 static bool classof(const Type *T) { 2921 return T->getTypeClass() == DependentName; 2922 } 2923 static bool classof(const DependentNameType *T) { return true; } 2924}; 2925 2926/// DependentTemplateSpecializationType - Represents a template 2927/// specialization type whose template cannot be resolved, e.g. 2928/// A<T>::template B<T> 2929class DependentTemplateSpecializationType : 2930 public TypeWithKeyword, public llvm::FoldingSetNode { 2931 2932 /// \brief The nested name specifier containing the qualifier. 2933 NestedNameSpecifier *NNS; 2934 2935 /// \brief The identifier of the template. 2936 const IdentifierInfo *Name; 2937 2938 /// \brief - The number of template arguments named in this class 2939 /// template specialization. 2940 unsigned NumArgs; 2941 2942 const TemplateArgument *getArgBuffer() const { 2943 return reinterpret_cast<const TemplateArgument*>(this+1); 2944 } 2945 TemplateArgument *getArgBuffer() { 2946 return reinterpret_cast<TemplateArgument*>(this+1); 2947 } 2948 2949 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 2950 NestedNameSpecifier *NNS, 2951 const IdentifierInfo *Name, 2952 unsigned NumArgs, 2953 const TemplateArgument *Args, 2954 QualType Canon); 2955 2956 friend class ASTContext; // ASTContext creates these 2957 2958public: 2959 virtual ~DependentTemplateSpecializationType(); 2960 2961 NestedNameSpecifier *getQualifier() const { return NNS; } 2962 const IdentifierInfo *getIdentifier() const { return Name; } 2963 2964 /// \brief Retrieve the template arguments. 2965 const TemplateArgument *getArgs() const { 2966 return getArgBuffer(); 2967 } 2968 2969 /// \brief Retrieve the number of template arguments. 2970 unsigned getNumArgs() const { return NumArgs; } 2971 2972 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2973 2974 typedef const TemplateArgument * iterator; 2975 iterator begin() const { return getArgs(); } 2976 iterator end() const; // inline in TemplateBase.h 2977 2978 bool isSugared() const { return false; } 2979 QualType desugar() const { return QualType(this, 0); } 2980 2981 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 2982 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 2983 } 2984 2985 static void Profile(llvm::FoldingSetNodeID &ID, 2986 ASTContext &Context, 2987 ElaboratedTypeKeyword Keyword, 2988 NestedNameSpecifier *Qualifier, 2989 const IdentifierInfo *Name, 2990 unsigned NumArgs, 2991 const TemplateArgument *Args); 2992 2993 static bool classof(const Type *T) { 2994 return T->getTypeClass() == DependentTemplateSpecialization; 2995 } 2996 static bool classof(const DependentTemplateSpecializationType *T) { 2997 return true; 2998 } 2999}; 3000 3001/// ObjCObjectType - Represents a class type in Objective C. 3002/// Every Objective C type is a combination of a base type and a 3003/// list of protocols. 3004/// 3005/// Given the following declarations: 3006/// @class C; 3007/// @protocol P; 3008/// 3009/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3010/// with base C and no protocols. 3011/// 3012/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3013/// 3014/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3015/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3016/// and no protocols. 3017/// 3018/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3019/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3020/// this should get its own sugar class to better represent the source. 3021class ObjCObjectType : public Type { 3022 // SubclassBits stores a count of number of protocols stored after 3023 // the ObjCObjectPointerType node. 3024 // 3025 // These protocols are those written directly on the type. If 3026 // protocol qualifiers ever become additive, the iterators will need 3027 // to get kindof complicated. 3028 // 3029 // In the canonical object type, these are sorted alphabetically 3030 // and uniqued. 3031 3032 /// Either a BuiltinType or an InterfaceType or sugar for either. 3033 QualType BaseType; 3034 3035 ObjCProtocolDecl * const *getProtocolStorage() const { 3036 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3037 } 3038 3039 ObjCProtocolDecl **getProtocolStorage(); 3040 3041protected: 3042 ObjCObjectType(QualType Canonical, QualType Base, 3043 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3044 3045 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3046 ObjCObjectType(enum Nonce_ObjCInterface) 3047 : Type(ObjCInterface, QualType(), false, false), 3048 BaseType(QualType(this_(), 0)) { 3049 SubclassBits = 0; 3050 } 3051 3052protected: 3053 std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; // key function 3054 3055public: 3056 /// getBaseType - Gets the base type of this object type. This is 3057 /// always (possibly sugar for) one of: 3058 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3059 /// user, which is a typedef for an ObjCPointerType) 3060 /// - the 'Class' builtin type (same caveat) 3061 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3062 QualType getBaseType() const { return BaseType; } 3063 3064 bool isObjCId() const { 3065 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3066 } 3067 bool isObjCClass() const { 3068 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3069 } 3070 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3071 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3072 bool isObjCUnqualifiedIdOrClass() const { 3073 if (!qual_empty()) return false; 3074 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3075 return T->getKind() == BuiltinType::ObjCId || 3076 T->getKind() == BuiltinType::ObjCClass; 3077 return false; 3078 } 3079 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3080 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3081 3082 /// Gets the interface declaration for this object type, if the base type 3083 /// really is an interface. 3084 ObjCInterfaceDecl *getInterface() const; 3085 3086 typedef ObjCProtocolDecl * const *qual_iterator; 3087 3088 qual_iterator qual_begin() const { return getProtocolStorage(); } 3089 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3090 3091 bool qual_empty() const { return getNumProtocols() == 0; } 3092 3093 /// getNumProtocols - Return the number of qualifying protocols in this 3094 /// interface type, or 0 if there are none. 3095 unsigned getNumProtocols() const { return SubclassBits; } 3096 3097 /// \brief Fetch a protocol by index. 3098 ObjCProtocolDecl *getProtocol(unsigned I) const { 3099 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3100 return qual_begin()[I]; 3101 } 3102 3103 bool isSugared() const { return false; } 3104 QualType desugar() const { return QualType(this, 0); } 3105 3106 static bool classof(const Type *T) { 3107 return T->getTypeClass() == ObjCObject || 3108 T->getTypeClass() == ObjCInterface; 3109 } 3110 static bool classof(const ObjCObjectType *) { return true; } 3111}; 3112 3113/// ObjCObjectTypeImpl - A class providing a concrete implementation 3114/// of ObjCObjectType, so as to not increase the footprint of 3115/// ObjCInterfaceType. Code outside of ASTContext and the core type 3116/// system should not reference this type. 3117class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3118 friend class ASTContext; 3119 3120 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3121 // will need to be modified. 3122 3123 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3124 ObjCProtocolDecl * const *Protocols, 3125 unsigned NumProtocols) 3126 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3127 3128public: 3129 void Profile(llvm::FoldingSetNodeID &ID); 3130 static void Profile(llvm::FoldingSetNodeID &ID, 3131 QualType Base, 3132 ObjCProtocolDecl *const *protocols, 3133 unsigned NumProtocols); 3134}; 3135 3136inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3137 return reinterpret_cast<ObjCProtocolDecl**>( 3138 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3139} 3140 3141/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3142/// object oriented design. They basically correspond to C++ classes. There 3143/// are two kinds of interface types, normal interfaces like "NSString" and 3144/// qualified interfaces, which are qualified with a protocol list like 3145/// "NSString<NSCopyable, NSAmazing>". 3146/// 3147/// ObjCInterfaceType guarantees the following properties when considered 3148/// as a subtype of its superclass, ObjCObjectType: 3149/// - There are no protocol qualifiers. To reinforce this, code which 3150/// tries to invoke the protocol methods via an ObjCInterfaceType will 3151/// fail to compile. 3152/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3153/// T->getBaseType() == QualType(T, 0). 3154class ObjCInterfaceType : public ObjCObjectType { 3155 ObjCInterfaceDecl *Decl; 3156 3157 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3158 : ObjCObjectType(Nonce_ObjCInterface), 3159 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3160 friend class ASTContext; // ASTContext creates these. 3161public: 3162 /// getDecl - Get the declaration of this interface. 3163 ObjCInterfaceDecl *getDecl() const { return Decl; } 3164 3165 bool isSugared() const { return false; } 3166 QualType desugar() const { return QualType(this, 0); } 3167 3168 static bool classof(const Type *T) { 3169 return T->getTypeClass() == ObjCInterface; 3170 } 3171 static bool classof(const ObjCInterfaceType *) { return true; } 3172 3173 // Nonsense to "hide" certain members of ObjCObjectType within this 3174 // class. People asking for protocols on an ObjCInterfaceType are 3175 // not going to get what they want: ObjCInterfaceTypes are 3176 // guaranteed to have no protocols. 3177 enum { 3178 qual_iterator, 3179 qual_begin, 3180 qual_end, 3181 getNumProtocols, 3182 getProtocol 3183 }; 3184}; 3185 3186inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3187 if (const ObjCInterfaceType *T = 3188 getBaseType()->getAs<ObjCInterfaceType>()) 3189 return T->getDecl(); 3190 return 0; 3191} 3192 3193/// ObjCObjectPointerType - Used to represent a pointer to an 3194/// Objective C object. These are constructed from pointer 3195/// declarators when the pointee type is an ObjCObjectType (or sugar 3196/// for one). In addition, the 'id' and 'Class' types are typedefs 3197/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3198/// are translated into these. 3199/// 3200/// Pointers to pointers to Objective C objects are still PointerTypes; 3201/// only the first level of pointer gets it own type implementation. 3202class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3203 QualType PointeeType; 3204 3205 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3206 : Type(ObjCObjectPointer, Canonical, false, false), 3207 PointeeType(Pointee) {} 3208 friend class ASTContext; // ASTContext creates these. 3209 3210protected: 3211 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 3212 3213public: 3214 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3215 /// The result will always be an ObjCObjectType or sugar thereof. 3216 QualType getPointeeType() const { return PointeeType; } 3217 3218 /// getObjCObjectType - Gets the type pointed to by this ObjC 3219 /// pointer. This method always returns non-null. 3220 /// 3221 /// This method is equivalent to getPointeeType() except that 3222 /// it discards any typedefs (or other sugar) between this 3223 /// type and the "outermost" object type. So for: 3224 /// @class A; @protocol P; @protocol Q; 3225 /// typedef A<P> AP; 3226 /// typedef A A1; 3227 /// typedef A1<P> A1P; 3228 /// typedef A1P<Q> A1PQ; 3229 /// For 'A*', getObjectType() will return 'A'. 3230 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3231 /// For 'AP*', getObjectType() will return 'A<P>'. 3232 /// For 'A1*', getObjectType() will return 'A'. 3233 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3234 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3235 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3236 /// adding protocols to a protocol-qualified base discards the 3237 /// old qualifiers (for now). But if it didn't, getObjectType() 3238 /// would return 'A1P<Q>' (and we'd have to make iterating over 3239 /// qualifiers more complicated). 3240 const ObjCObjectType *getObjectType() const { 3241 return PointeeType->getAs<ObjCObjectType>(); 3242 } 3243 3244 /// getInterfaceType - If this pointer points to an Objective C 3245 /// @interface type, gets the type for that interface. Any protocol 3246 /// qualifiers on the interface are ignored. 3247 /// 3248 /// \return null if the base type for this pointer is 'id' or 'Class' 3249 const ObjCInterfaceType *getInterfaceType() const { 3250 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3251 } 3252 3253 /// getInterfaceDecl - If this pointer points to an Objective @interface 3254 /// type, gets the declaration for that interface. 3255 /// 3256 /// \return null if the base type for this pointer is 'id' or 'Class' 3257 ObjCInterfaceDecl *getInterfaceDecl() const { 3258 return getObjectType()->getInterface(); 3259 } 3260 3261 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3262 /// its object type is the primitive 'id' type with no protocols. 3263 bool isObjCIdType() const { 3264 return getObjectType()->isObjCUnqualifiedId(); 3265 } 3266 3267 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3268 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3269 bool isObjCClassType() const { 3270 return getObjectType()->isObjCUnqualifiedClass(); 3271 } 3272 3273 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3274 /// non-empty set of protocols. 3275 bool isObjCQualifiedIdType() const { 3276 return getObjectType()->isObjCQualifiedId(); 3277 } 3278 3279 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3280 /// some non-empty set of protocols. 3281 bool isObjCQualifiedClassType() const { 3282 return getObjectType()->isObjCQualifiedClass(); 3283 } 3284 3285 /// An iterator over the qualifiers on the object type. Provided 3286 /// for convenience. This will always iterate over the full set of 3287 /// protocols on a type, not just those provided directly. 3288 typedef ObjCObjectType::qual_iterator qual_iterator; 3289 3290 qual_iterator qual_begin() const { 3291 return getObjectType()->qual_begin(); 3292 } 3293 qual_iterator qual_end() const { 3294 return getObjectType()->qual_end(); 3295 } 3296 bool qual_empty() const { return getObjectType()->qual_empty(); } 3297 3298 /// getNumProtocols - Return the number of qualifying protocols on 3299 /// the object type. 3300 unsigned getNumProtocols() const { 3301 return getObjectType()->getNumProtocols(); 3302 } 3303 3304 /// \brief Retrieve a qualifying protocol by index on the object 3305 /// type. 3306 ObjCProtocolDecl *getProtocol(unsigned I) const { 3307 return getObjectType()->getProtocol(I); 3308 } 3309 3310 bool isSugared() const { return false; } 3311 QualType desugar() const { return QualType(this, 0); } 3312 3313 void Profile(llvm::FoldingSetNodeID &ID) { 3314 Profile(ID, getPointeeType()); 3315 } 3316 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3317 ID.AddPointer(T.getAsOpaquePtr()); 3318 } 3319 static bool classof(const Type *T) { 3320 return T->getTypeClass() == ObjCObjectPointer; 3321 } 3322 static bool classof(const ObjCObjectPointerType *) { return true; } 3323}; 3324 3325/// A qualifier set is used to build a set of qualifiers. 3326class QualifierCollector : public Qualifiers { 3327 ASTContext *Context; 3328 3329public: 3330 QualifierCollector(Qualifiers Qs = Qualifiers()) 3331 : Qualifiers(Qs), Context(0) {} 3332 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3333 : Qualifiers(Qs), Context(&Context) {} 3334 3335 void setContext(ASTContext &C) { Context = &C; } 3336 3337 /// Collect any qualifiers on the given type and return an 3338 /// unqualified type. 3339 const Type *strip(QualType QT) { 3340 addFastQualifiers(QT.getLocalFastQualifiers()); 3341 if (QT.hasLocalNonFastQualifiers()) { 3342 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3343 Context = &EQ->getContext(); 3344 addQualifiers(EQ->getQualifiers()); 3345 return EQ->getBaseType(); 3346 } 3347 return QT.getTypePtrUnsafe(); 3348 } 3349 3350 /// Apply the collected qualifiers to the given type. 3351 QualType apply(QualType QT) const; 3352 3353 /// Apply the collected qualifiers to the given type. 3354 QualType apply(const Type* T) const; 3355 3356}; 3357 3358 3359// Inline function definitions. 3360 3361inline bool QualType::isCanonical() const { 3362 const Type *T = getTypePtr(); 3363 if (hasLocalQualifiers()) 3364 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3365 return T->isCanonicalUnqualified(); 3366} 3367 3368inline bool QualType::isCanonicalAsParam() const { 3369 if (hasLocalQualifiers()) return false; 3370 3371 const Type *T = getTypePtr(); 3372 if ((*this)->isPointerType()) { 3373 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3374 if (isa<VariableArrayType>(BaseType)) { 3375 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3376 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3377 if (VAT->getSizeExpr()) 3378 T = BaseType.getTypePtr(); 3379 } 3380 } 3381 return T->isCanonicalUnqualified() && 3382 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3383} 3384 3385inline bool QualType::isConstQualified() const { 3386 return isLocalConstQualified() || 3387 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3388} 3389 3390inline bool QualType::isRestrictQualified() const { 3391 return isLocalRestrictQualified() || 3392 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3393} 3394 3395 3396inline bool QualType::isVolatileQualified() const { 3397 return isLocalVolatileQualified() || 3398 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3399} 3400 3401inline bool QualType::hasQualifiers() const { 3402 return hasLocalQualifiers() || 3403 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3404} 3405 3406inline Qualifiers QualType::getQualifiers() const { 3407 Qualifiers Quals = getLocalQualifiers(); 3408 Quals.addQualifiers( 3409 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3410 return Quals; 3411} 3412 3413inline unsigned QualType::getCVRQualifiers() const { 3414 return getLocalCVRQualifiers() | 3415 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3416} 3417 3418/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3419/// type, returns them. Otherwise, if this is an array type, recurses 3420/// on the element type until some qualifiers have been found or a non-array 3421/// type reached. 3422inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3423 if (unsigned Quals = getCVRQualifiers()) 3424 return Quals; 3425 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3426 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3427 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3428 return 0; 3429} 3430 3431inline void QualType::removeConst() { 3432 removeFastQualifiers(Qualifiers::Const); 3433} 3434 3435inline void QualType::removeRestrict() { 3436 removeFastQualifiers(Qualifiers::Restrict); 3437} 3438 3439inline void QualType::removeVolatile() { 3440 QualifierCollector Qc; 3441 const Type *Ty = Qc.strip(*this); 3442 if (Qc.hasVolatile()) { 3443 Qc.removeVolatile(); 3444 *this = Qc.apply(Ty); 3445 } 3446} 3447 3448inline void QualType::removeCVRQualifiers(unsigned Mask) { 3449 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3450 3451 // Fast path: we don't need to touch the slow qualifiers. 3452 if (!(Mask & ~Qualifiers::FastMask)) { 3453 removeFastQualifiers(Mask); 3454 return; 3455 } 3456 3457 QualifierCollector Qc; 3458 const Type *Ty = Qc.strip(*this); 3459 Qc.removeCVRQualifiers(Mask); 3460 *this = Qc.apply(Ty); 3461} 3462 3463/// getAddressSpace - Return the address space of this type. 3464inline unsigned QualType::getAddressSpace() const { 3465 if (hasLocalNonFastQualifiers()) { 3466 const ExtQuals *EQ = getExtQualsUnsafe(); 3467 if (EQ->hasAddressSpace()) 3468 return EQ->getAddressSpace(); 3469 } 3470 3471 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3472 if (CT.hasLocalNonFastQualifiers()) { 3473 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3474 if (EQ->hasAddressSpace()) 3475 return EQ->getAddressSpace(); 3476 } 3477 3478 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3479 return AT->getElementType().getAddressSpace(); 3480 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3481 return RT->getAddressSpace(); 3482 return 0; 3483} 3484 3485/// getObjCGCAttr - Return the gc attribute of this type. 3486inline Qualifiers::GC QualType::getObjCGCAttr() const { 3487 if (hasLocalNonFastQualifiers()) { 3488 const ExtQuals *EQ = getExtQualsUnsafe(); 3489 if (EQ->hasObjCGCAttr()) 3490 return EQ->getObjCGCAttr(); 3491 } 3492 3493 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3494 if (CT.hasLocalNonFastQualifiers()) { 3495 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3496 if (EQ->hasObjCGCAttr()) 3497 return EQ->getObjCGCAttr(); 3498 } 3499 3500 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3501 return AT->getElementType().getObjCGCAttr(); 3502 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3503 return PT->getPointeeType().getObjCGCAttr(); 3504 // We most look at all pointer types, not just pointer to interface types. 3505 if (const PointerType *PT = CT->getAs<PointerType>()) 3506 return PT->getPointeeType().getObjCGCAttr(); 3507 return Qualifiers::GCNone; 3508} 3509 3510inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3511 if (const PointerType *PT = t.getAs<PointerType>()) { 3512 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3513 return FT->getExtInfo(); 3514 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3515 return FT->getExtInfo(); 3516 3517 return FunctionType::ExtInfo(); 3518} 3519 3520inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3521 return getFunctionExtInfo(*t); 3522} 3523 3524/// \brief Determine whether this set of qualifiers is a superset of the given 3525/// set of qualifiers. 3526inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3527 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3528} 3529 3530/// isMoreQualifiedThan - Determine whether this type is more 3531/// qualified than the Other type. For example, "const volatile int" 3532/// is more qualified than "const int", "volatile int", and 3533/// "int". However, it is not more qualified than "const volatile 3534/// int". 3535inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3536 // FIXME: work on arbitrary qualifiers 3537 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3538 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3539 if (getAddressSpace() != Other.getAddressSpace()) 3540 return false; 3541 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3542} 3543 3544/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3545/// as qualified as the Other type. For example, "const volatile 3546/// int" is at least as qualified as "const int", "volatile int", 3547/// "int", and "const volatile int". 3548inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3549 // FIXME: work on arbitrary qualifiers 3550 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3551 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3552 if (getAddressSpace() != Other.getAddressSpace()) 3553 return false; 3554 return (MyQuals | OtherQuals) == MyQuals; 3555} 3556 3557/// getNonReferenceType - If Type is a reference type (e.g., const 3558/// int&), returns the type that the reference refers to ("const 3559/// int"). Otherwise, returns the type itself. This routine is used 3560/// throughout Sema to implement C++ 5p6: 3561/// 3562/// If an expression initially has the type "reference to T" (8.3.2, 3563/// 8.5.3), the type is adjusted to "T" prior to any further 3564/// analysis, the expression designates the object or function 3565/// denoted by the reference, and the expression is an lvalue. 3566inline QualType QualType::getNonReferenceType() const { 3567 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3568 return RefType->getPointeeType(); 3569 else 3570 return *this; 3571} 3572 3573inline bool Type::isFunctionType() const { 3574 return isa<FunctionType>(CanonicalType); 3575} 3576inline bool Type::isPointerType() const { 3577 return isa<PointerType>(CanonicalType); 3578} 3579inline bool Type::isAnyPointerType() const { 3580 return isPointerType() || isObjCObjectPointerType(); 3581} 3582inline bool Type::isBlockPointerType() const { 3583 return isa<BlockPointerType>(CanonicalType); 3584} 3585inline bool Type::isReferenceType() const { 3586 return isa<ReferenceType>(CanonicalType); 3587} 3588inline bool Type::isLValueReferenceType() const { 3589 return isa<LValueReferenceType>(CanonicalType); 3590} 3591inline bool Type::isRValueReferenceType() const { 3592 return isa<RValueReferenceType>(CanonicalType); 3593} 3594inline bool Type::isFunctionPointerType() const { 3595 if (const PointerType* T = getAs<PointerType>()) 3596 return T->getPointeeType()->isFunctionType(); 3597 else 3598 return false; 3599} 3600inline bool Type::isMemberPointerType() const { 3601 return isa<MemberPointerType>(CanonicalType); 3602} 3603inline bool Type::isMemberFunctionPointerType() const { 3604 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3605 return T->isMemberFunctionPointer(); 3606 else 3607 return false; 3608} 3609inline bool Type::isMemberDataPointerType() const { 3610 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3611 return T->isMemberDataPointer(); 3612 else 3613 return false; 3614} 3615inline bool Type::isArrayType() const { 3616 return isa<ArrayType>(CanonicalType); 3617} 3618inline bool Type::isConstantArrayType() const { 3619 return isa<ConstantArrayType>(CanonicalType); 3620} 3621inline bool Type::isIncompleteArrayType() const { 3622 return isa<IncompleteArrayType>(CanonicalType); 3623} 3624inline bool Type::isVariableArrayType() const { 3625 return isa<VariableArrayType>(CanonicalType); 3626} 3627inline bool Type::isDependentSizedArrayType() const { 3628 return isa<DependentSizedArrayType>(CanonicalType); 3629} 3630inline bool Type::isBuiltinType() const { 3631 return isa<BuiltinType>(CanonicalType); 3632} 3633inline bool Type::isRecordType() const { 3634 return isa<RecordType>(CanonicalType); 3635} 3636inline bool Type::isEnumeralType() const { 3637 return isa<EnumType>(CanonicalType); 3638} 3639inline bool Type::isAnyComplexType() const { 3640 return isa<ComplexType>(CanonicalType); 3641} 3642inline bool Type::isVectorType() const { 3643 return isa<VectorType>(CanonicalType); 3644} 3645inline bool Type::isExtVectorType() const { 3646 return isa<ExtVectorType>(CanonicalType); 3647} 3648inline bool Type::isObjCObjectPointerType() const { 3649 return isa<ObjCObjectPointerType>(CanonicalType); 3650} 3651inline bool Type::isObjCObjectType() const { 3652 return isa<ObjCObjectType>(CanonicalType); 3653} 3654inline bool Type::isObjCObjectOrInterfaceType() const { 3655 return isa<ObjCInterfaceType>(CanonicalType) || 3656 isa<ObjCObjectType>(CanonicalType); 3657} 3658 3659inline bool Type::isObjCQualifiedIdType() const { 3660 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3661 return OPT->isObjCQualifiedIdType(); 3662 return false; 3663} 3664inline bool Type::isObjCQualifiedClassType() const { 3665 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3666 return OPT->isObjCQualifiedClassType(); 3667 return false; 3668} 3669inline bool Type::isObjCIdType() const { 3670 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3671 return OPT->isObjCIdType(); 3672 return false; 3673} 3674inline bool Type::isObjCClassType() const { 3675 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3676 return OPT->isObjCClassType(); 3677 return false; 3678} 3679inline bool Type::isObjCSelType() const { 3680 if (const PointerType *OPT = getAs<PointerType>()) 3681 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3682 return false; 3683} 3684inline bool Type::isObjCBuiltinType() const { 3685 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3686} 3687inline bool Type::isTemplateTypeParmType() const { 3688 return isa<TemplateTypeParmType>(CanonicalType); 3689} 3690 3691inline bool Type::isSpecificBuiltinType(unsigned K) const { 3692 if (const BuiltinType *BT = getAs<BuiltinType>()) 3693 if (BT->getKind() == (BuiltinType::Kind) K) 3694 return true; 3695 return false; 3696} 3697 3698inline bool Type::isPlaceholderType() const { 3699 if (const BuiltinType *BT = getAs<BuiltinType>()) 3700 return BT->isPlaceholderType(); 3701 return false; 3702} 3703 3704/// \brief Determines whether this is a type for which one can define 3705/// an overloaded operator. 3706inline bool Type::isOverloadableType() const { 3707 return isDependentType() || isRecordType() || isEnumeralType(); 3708} 3709 3710inline bool Type::hasPointerRepresentation() const { 3711 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3712 isObjCObjectPointerType() || isNullPtrType()); 3713} 3714 3715inline bool Type::hasObjCPointerRepresentation() const { 3716 return isObjCObjectPointerType(); 3717} 3718 3719/// Insertion operator for diagnostics. This allows sending QualType's into a 3720/// diagnostic with <<. 3721inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3722 QualType T) { 3723 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3724 Diagnostic::ak_qualtype); 3725 return DB; 3726} 3727 3728/// Insertion operator for partial diagnostics. This allows sending QualType's 3729/// into a diagnostic with <<. 3730inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3731 QualType T) { 3732 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3733 Diagnostic::ak_qualtype); 3734 return PD; 3735} 3736 3737// Helper class template that is used by Type::getAs to ensure that one does 3738// not try to look through a qualified type to get to an array type. 3739template<typename T, 3740 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3741 llvm::is_base_of<ArrayType, T>::value)> 3742struct ArrayType_cannot_be_used_with_getAs { }; 3743 3744template<typename T> 3745struct ArrayType_cannot_be_used_with_getAs<T, true>; 3746 3747/// Member-template getAs<specific type>'. 3748template <typename T> const T *Type::getAs() const { 3749 ArrayType_cannot_be_used_with_getAs<T> at; 3750 (void)at; 3751 3752 // If this is directly a T type, return it. 3753 if (const T *Ty = dyn_cast<T>(this)) 3754 return Ty; 3755 3756 // If the canonical form of this type isn't the right kind, reject it. 3757 if (!isa<T>(CanonicalType)) 3758 return 0; 3759 3760 // If this is a typedef for the type, strip the typedef off without 3761 // losing all typedef information. 3762 return cast<T>(getUnqualifiedDesugaredType()); 3763} 3764 3765} // end namespace clang 3766 3767#undef BITFIELD 3768#undef InitialBitfieldWidth 3769#undef InitialBitfieldOffset 3770 3771#endif 3772