Type.h revision 3c8dec3136c81c69094121b9890b7f443e4d5c56
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/Basic/Visibility.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/TemplateName.h" 24#include "llvm/Support/Casting.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/ADT/APSInt.h" 27#include "llvm/ADT/FoldingSet.h" 28#include "llvm/ADT/PointerIntPair.h" 29#include "llvm/ADT/PointerUnion.h" 30 31using llvm::isa; 32using llvm::cast; 33using llvm::cast_or_null; 34using llvm::dyn_cast; 35using llvm::dyn_cast_or_null; 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 3, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class ObjCInterfaceDecl; 85 class ObjCProtocolDecl; 86 class ObjCMethodDecl; 87 class UnresolvedUsingTypenameDecl; 88 class Expr; 89 class Stmt; 90 class SourceLocation; 91 class StmtIteratorBase; 92 class TemplateArgument; 93 class TemplateArgumentLoc; 94 class TemplateArgumentListInfo; 95 class Type; 96 class ElaboratedType; 97 struct PrintingPolicy; 98 99 template <typename> class CanQual; 100 typedef CanQual<Type> CanQualType; 101 102 // Provide forward declarations for all of the *Type classes 103#define TYPE(Class, Base) class Class##Type; 104#include "clang/AST/TypeNodes.def" 105 106/// Qualifiers - The collection of all-type qualifiers we support. 107/// Clang supports five independent qualifiers: 108/// * C99: const, volatile, and restrict 109/// * Embedded C (TR18037): address spaces 110/// * Objective C: the GC attributes (none, weak, or strong) 111class Qualifiers { 112public: 113 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 114 Const = 0x1, 115 Restrict = 0x2, 116 Volatile = 0x4, 117 CVRMask = Const | Volatile | Restrict 118 }; 119 120 enum GC { 121 GCNone = 0, 122 Weak, 123 Strong 124 }; 125 126 enum { 127 /// The maximum supported address space number. 128 /// 24 bits should be enough for anyone. 129 MaxAddressSpace = 0xffffffu, 130 131 /// The width of the "fast" qualifier mask. 132 FastWidth = 2, 133 134 /// The fast qualifier mask. 135 FastMask = (1 << FastWidth) - 1 136 }; 137 138 Qualifiers() : Mask(0) {} 139 140 static Qualifiers fromFastMask(unsigned Mask) { 141 Qualifiers Qs; 142 Qs.addFastQualifiers(Mask); 143 return Qs; 144 } 145 146 static Qualifiers fromCVRMask(unsigned CVR) { 147 Qualifiers Qs; 148 Qs.addCVRQualifiers(CVR); 149 return Qs; 150 } 151 152 // Deserialize qualifiers from an opaque representation. 153 static Qualifiers fromOpaqueValue(unsigned opaque) { 154 Qualifiers Qs; 155 Qs.Mask = opaque; 156 return Qs; 157 } 158 159 // Serialize these qualifiers into an opaque representation. 160 unsigned getAsOpaqueValue() const { 161 return Mask; 162 } 163 164 bool hasConst() const { return Mask & Const; } 165 void setConst(bool flag) { 166 Mask = (Mask & ~Const) | (flag ? Const : 0); 167 } 168 void removeConst() { Mask &= ~Const; } 169 void addConst() { Mask |= Const; } 170 171 bool hasVolatile() const { return Mask & Volatile; } 172 void setVolatile(bool flag) { 173 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 174 } 175 void removeVolatile() { Mask &= ~Volatile; } 176 void addVolatile() { Mask |= Volatile; } 177 178 bool hasRestrict() const { return Mask & Restrict; } 179 void setRestrict(bool flag) { 180 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 181 } 182 void removeRestrict() { Mask &= ~Restrict; } 183 void addRestrict() { Mask |= Restrict; } 184 185 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 186 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 187 void setCVRQualifiers(unsigned mask) { 188 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 189 Mask = (Mask & ~CVRMask) | mask; 190 } 191 void removeCVRQualifiers(unsigned mask) { 192 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 193 Mask &= ~mask; 194 } 195 void removeCVRQualifiers() { 196 removeCVRQualifiers(CVRMask); 197 } 198 void addCVRQualifiers(unsigned mask) { 199 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 200 Mask |= mask; 201 } 202 203 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 204 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 205 void setObjCGCAttr(GC type) { 206 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 207 } 208 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 209 void addObjCGCAttr(GC type) { 210 assert(type); 211 setObjCGCAttr(type); 212 } 213 214 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 215 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 216 void setAddressSpace(unsigned space) { 217 assert(space <= MaxAddressSpace); 218 Mask = (Mask & ~AddressSpaceMask) 219 | (((uint32_t) space) << AddressSpaceShift); 220 } 221 void removeAddressSpace() { setAddressSpace(0); } 222 void addAddressSpace(unsigned space) { 223 assert(space); 224 setAddressSpace(space); 225 } 226 227 // Fast qualifiers are those that can be allocated directly 228 // on a QualType object. 229 bool hasFastQualifiers() const { return getFastQualifiers(); } 230 unsigned getFastQualifiers() const { return Mask & FastMask; } 231 void setFastQualifiers(unsigned mask) { 232 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 233 Mask = (Mask & ~FastMask) | mask; 234 } 235 void removeFastQualifiers(unsigned mask) { 236 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 237 Mask &= ~mask; 238 } 239 void removeFastQualifiers() { 240 removeFastQualifiers(FastMask); 241 } 242 void addFastQualifiers(unsigned mask) { 243 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 244 Mask |= mask; 245 } 246 247 /// hasNonFastQualifiers - Return true if the set contains any 248 /// qualifiers which require an ExtQuals node to be allocated. 249 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 250 Qualifiers getNonFastQualifiers() const { 251 Qualifiers Quals = *this; 252 Quals.setFastQualifiers(0); 253 return Quals; 254 } 255 256 /// hasQualifiers - Return true if the set contains any qualifiers. 257 bool hasQualifiers() const { return Mask; } 258 bool empty() const { return !Mask; } 259 260 /// \brief Add the qualifiers from the given set to this set. 261 void addQualifiers(Qualifiers Q) { 262 // If the other set doesn't have any non-boolean qualifiers, just 263 // bit-or it in. 264 if (!(Q.Mask & ~CVRMask)) 265 Mask |= Q.Mask; 266 else { 267 Mask |= (Q.Mask & CVRMask); 268 if (Q.hasAddressSpace()) 269 addAddressSpace(Q.getAddressSpace()); 270 if (Q.hasObjCGCAttr()) 271 addObjCGCAttr(Q.getObjCGCAttr()); 272 } 273 } 274 275 bool isSupersetOf(Qualifiers Other) const; 276 277 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 278 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 279 280 operator bool() const { return hasQualifiers(); } 281 282 Qualifiers &operator+=(Qualifiers R) { 283 addQualifiers(R); 284 return *this; 285 } 286 287 // Union two qualifier sets. If an enumerated qualifier appears 288 // in both sets, use the one from the right. 289 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 290 L += R; 291 return L; 292 } 293 294 Qualifiers &operator-=(Qualifiers R) { 295 Mask = Mask & ~(R.Mask); 296 return *this; 297 } 298 299 /// \brief Compute the difference between two qualifier sets. 300 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 301 L -= R; 302 return L; 303 } 304 305 std::string getAsString() const; 306 std::string getAsString(const PrintingPolicy &Policy) const { 307 std::string Buffer; 308 getAsStringInternal(Buffer, Policy); 309 return Buffer; 310 } 311 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 312 313 void Profile(llvm::FoldingSetNodeID &ID) const { 314 ID.AddInteger(Mask); 315 } 316 317private: 318 319 // bits: |0 1 2|3 .. 4|5 .. 31| 320 // |C R V|GCAttr|AddrSpace| 321 uint32_t Mask; 322 323 static const uint32_t GCAttrMask = 0x18; 324 static const uint32_t GCAttrShift = 3; 325 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 326 static const uint32_t AddressSpaceShift = 5; 327}; 328 329 330/// ExtQuals - We can encode up to three bits in the low bits of a 331/// type pointer, but there are many more type qualifiers that we want 332/// to be able to apply to an arbitrary type. Therefore we have this 333/// struct, intended to be heap-allocated and used by QualType to 334/// store qualifiers. 335/// 336/// The current design tags the 'const' and 'restrict' qualifiers in 337/// two low bits on the QualType pointer; a third bit records whether 338/// the pointer is an ExtQuals node. 'const' was chosen because it is 339/// orders of magnitude more common than the other two qualifiers, in 340/// both library and user code. It's relatively rare to see 341/// 'restrict' in user code, but many standard C headers are saturated 342/// with 'restrict' declarations, so that representing them efficiently 343/// is a critical goal of this representation. 344class ExtQuals : public llvm::FoldingSetNode { 345 // NOTE: changing the fast qualifiers should be straightforward as 346 // long as you don't make 'const' non-fast. 347 // 1. Qualifiers: 348 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 349 // Fast qualifiers must occupy the low-order bits. 350 // b) Update Qualifiers::FastWidth and FastMask. 351 // 2. QualType: 352 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 353 // b) Update remove{Volatile,Restrict}, defined near the end of 354 // this header. 355 // 3. ASTContext: 356 // a) Update get{Volatile,Restrict}Type. 357 358 /// Context - the context to which this set belongs. We save this 359 /// here so that QualifierCollector can use it to reapply extended 360 /// qualifiers to an arbitrary type without requiring a context to 361 /// be pushed through every single API dealing with qualifiers. 362 ASTContext& Context; 363 364 /// BaseType - the underlying type that this qualifies 365 const Type *BaseType; 366 367 /// Quals - the immutable set of qualifiers applied by this 368 /// node; always contains extended qualifiers. 369 Qualifiers Quals; 370 371public: 372 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 373 : Context(Context), BaseType(Base), Quals(Quals) 374 { 375 assert(Quals.hasNonFastQualifiers() 376 && "ExtQuals created with no fast qualifiers"); 377 assert(!Quals.hasFastQualifiers() 378 && "ExtQuals created with fast qualifiers"); 379 } 380 381 Qualifiers getQualifiers() const { return Quals; } 382 383 bool hasVolatile() const { return Quals.hasVolatile(); } 384 385 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 386 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 387 388 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 389 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 390 391 const Type *getBaseType() const { return BaseType; } 392 393 ASTContext &getContext() const { return Context; } 394 395public: 396 void Profile(llvm::FoldingSetNodeID &ID) const { 397 Profile(ID, getBaseType(), Quals); 398 } 399 static void Profile(llvm::FoldingSetNodeID &ID, 400 const Type *BaseType, 401 Qualifiers Quals) { 402 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 403 ID.AddPointer(BaseType); 404 Quals.Profile(ID); 405 } 406}; 407 408/// CallingConv - Specifies the calling convention that a function uses. 409enum CallingConv { 410 CC_Default, 411 CC_C, // __attribute__((cdecl)) 412 CC_X86StdCall, // __attribute__((stdcall)) 413 CC_X86FastCall, // __attribute__((fastcall)) 414 CC_X86ThisCall, // __attribute__((thiscall)) 415 CC_X86Pascal // __attribute__((pascal)) 416}; 417 418 419/// QualType - For efficiency, we don't store CV-qualified types as nodes on 420/// their own: instead each reference to a type stores the qualifiers. This 421/// greatly reduces the number of nodes we need to allocate for types (for 422/// example we only need one for 'int', 'const int', 'volatile int', 423/// 'const volatile int', etc). 424/// 425/// As an added efficiency bonus, instead of making this a pair, we 426/// just store the two bits we care about in the low bits of the 427/// pointer. To handle the packing/unpacking, we make QualType be a 428/// simple wrapper class that acts like a smart pointer. A third bit 429/// indicates whether there are extended qualifiers present, in which 430/// case the pointer points to a special structure. 431class QualType { 432 // Thankfully, these are efficiently composable. 433 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 434 Qualifiers::FastWidth> Value; 435 436 const ExtQuals *getExtQualsUnsafe() const { 437 return Value.getPointer().get<const ExtQuals*>(); 438 } 439 440 const Type *getTypePtrUnsafe() const { 441 return Value.getPointer().get<const Type*>(); 442 } 443 444 QualType getUnqualifiedTypeSlow() const; 445 446 friend class QualifierCollector; 447public: 448 QualType() {} 449 450 QualType(const Type *Ptr, unsigned Quals) 451 : Value(Ptr, Quals) {} 452 QualType(const ExtQuals *Ptr, unsigned Quals) 453 : Value(Ptr, Quals) {} 454 455 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 456 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 457 458 /// Retrieves a pointer to the underlying (unqualified) type. 459 /// This should really return a const Type, but it's not worth 460 /// changing all the users right now. 461 Type *getTypePtr() const { 462 if (hasLocalNonFastQualifiers()) 463 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 464 return const_cast<Type*>(getTypePtrUnsafe()); 465 } 466 467 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 468 static QualType getFromOpaquePtr(void *Ptr) { 469 QualType T; 470 T.Value.setFromOpaqueValue(Ptr); 471 return T; 472 } 473 474 Type &operator*() const { 475 return *getTypePtr(); 476 } 477 478 Type *operator->() const { 479 return getTypePtr(); 480 } 481 482 bool isCanonical() const; 483 bool isCanonicalAsParam() const; 484 485 /// isNull - Return true if this QualType doesn't point to a type yet. 486 bool isNull() const { 487 return Value.getPointer().isNull(); 488 } 489 490 /// \brief Determine whether this particular QualType instance has the 491 /// "const" qualifier set, without looking through typedefs that may have 492 /// added "const" at a different level. 493 bool isLocalConstQualified() const { 494 return (getLocalFastQualifiers() & Qualifiers::Const); 495 } 496 497 /// \brief Determine whether this type is const-qualified. 498 bool isConstQualified() const; 499 500 /// \brief Determine whether this particular QualType instance has the 501 /// "restrict" qualifier set, without looking through typedefs that may have 502 /// added "restrict" at a different level. 503 bool isLocalRestrictQualified() const { 504 return (getLocalFastQualifiers() & Qualifiers::Restrict); 505 } 506 507 /// \brief Determine whether this type is restrict-qualified. 508 bool isRestrictQualified() const; 509 510 /// \brief Determine whether this particular QualType instance has the 511 /// "volatile" qualifier set, without looking through typedefs that may have 512 /// added "volatile" at a different level. 513 bool isLocalVolatileQualified() const { 514 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 515 } 516 517 /// \brief Determine whether this type is volatile-qualified. 518 bool isVolatileQualified() const; 519 520 /// \brief Determine whether this particular QualType instance has any 521 /// qualifiers, without looking through any typedefs that might add 522 /// qualifiers at a different level. 523 bool hasLocalQualifiers() const { 524 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 525 } 526 527 /// \brief Determine whether this type has any qualifiers. 528 bool hasQualifiers() const; 529 530 /// \brief Determine whether this particular QualType instance has any 531 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 532 /// instance. 533 bool hasLocalNonFastQualifiers() const { 534 return Value.getPointer().is<const ExtQuals*>(); 535 } 536 537 /// \brief Retrieve the set of qualifiers local to this particular QualType 538 /// instance, not including any qualifiers acquired through typedefs or 539 /// other sugar. 540 Qualifiers getLocalQualifiers() const { 541 Qualifiers Quals; 542 if (hasLocalNonFastQualifiers()) 543 Quals = getExtQualsUnsafe()->getQualifiers(); 544 Quals.addFastQualifiers(getLocalFastQualifiers()); 545 return Quals; 546 } 547 548 /// \brief Retrieve the set of qualifiers applied to this type. 549 Qualifiers getQualifiers() const; 550 551 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 552 /// local to this particular QualType instance, not including any qualifiers 553 /// acquired through typedefs or other sugar. 554 unsigned getLocalCVRQualifiers() const { 555 unsigned CVR = getLocalFastQualifiers(); 556 if (isLocalVolatileQualified()) 557 CVR |= Qualifiers::Volatile; 558 return CVR; 559 } 560 561 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 562 /// applied to this type. 563 unsigned getCVRQualifiers() const; 564 565 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 566 /// applied to this type, looking through any number of unqualified array 567 /// types to their element types' qualifiers. 568 unsigned getCVRQualifiersThroughArrayTypes() const; 569 570 bool isConstant(ASTContext& Ctx) const { 571 return QualType::isConstant(*this, Ctx); 572 } 573 574 // Don't promise in the API that anything besides 'const' can be 575 // easily added. 576 577 /// addConst - add the specified type qualifier to this QualType. 578 void addConst() { 579 addFastQualifiers(Qualifiers::Const); 580 } 581 QualType withConst() const { 582 return withFastQualifiers(Qualifiers::Const); 583 } 584 585 void addFastQualifiers(unsigned TQs) { 586 assert(!(TQs & ~Qualifiers::FastMask) 587 && "non-fast qualifier bits set in mask!"); 588 Value.setInt(Value.getInt() | TQs); 589 } 590 591 // FIXME: The remove* functions are semantically broken, because they might 592 // not remove a qualifier stored on a typedef. Most of the with* functions 593 // have the same problem. 594 void removeConst(); 595 void removeVolatile(); 596 void removeRestrict(); 597 void removeCVRQualifiers(unsigned Mask); 598 599 void removeFastQualifiers() { Value.setInt(0); } 600 void removeFastQualifiers(unsigned Mask) { 601 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 602 Value.setInt(Value.getInt() & ~Mask); 603 } 604 605 // Creates a type with the given qualifiers in addition to any 606 // qualifiers already on this type. 607 QualType withFastQualifiers(unsigned TQs) const { 608 QualType T = *this; 609 T.addFastQualifiers(TQs); 610 return T; 611 } 612 613 // Creates a type with exactly the given fast qualifiers, removing 614 // any existing fast qualifiers. 615 QualType withExactFastQualifiers(unsigned TQs) const { 616 return withoutFastQualifiers().withFastQualifiers(TQs); 617 } 618 619 // Removes fast qualifiers, but leaves any extended qualifiers in place. 620 QualType withoutFastQualifiers() const { 621 QualType T = *this; 622 T.removeFastQualifiers(); 623 return T; 624 } 625 626 /// \brief Return this type with all of the instance-specific qualifiers 627 /// removed, but without removing any qualifiers that may have been applied 628 /// through typedefs. 629 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 630 631 /// \brief Return the unqualified form of the given type, which might be 632 /// desugared to eliminate qualifiers introduced via typedefs. 633 QualType getUnqualifiedType() const { 634 QualType T = getLocalUnqualifiedType(); 635 if (!T.hasQualifiers()) 636 return T; 637 638 return getUnqualifiedTypeSlow(); 639 } 640 641 bool isMoreQualifiedThan(QualType Other) const; 642 bool isAtLeastAsQualifiedAs(QualType Other) const; 643 QualType getNonReferenceType() const; 644 645 /// \brief Determine the type of a (typically non-lvalue) expression with the 646 /// specified result type. 647 /// 648 /// This routine should be used for expressions for which the return type is 649 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 650 /// an lvalue. It removes a top-level reference (since there are no 651 /// expressions of reference type) and deletes top-level cvr-qualifiers 652 /// from non-class types (in C++) or all types (in C). 653 QualType getNonLValueExprType(ASTContext &Context) const; 654 655 /// getDesugaredType - Return the specified type with any "sugar" removed from 656 /// the type. This takes off typedefs, typeof's etc. If the outer level of 657 /// the type is already concrete, it returns it unmodified. This is similar 658 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 659 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 660 /// concrete. 661 /// 662 /// Qualifiers are left in place. 663 QualType getDesugaredType() const { 664 return QualType::getDesugaredType(*this); 665 } 666 667 /// operator==/!= - Indicate whether the specified types and qualifiers are 668 /// identical. 669 friend bool operator==(const QualType &LHS, const QualType &RHS) { 670 return LHS.Value == RHS.Value; 671 } 672 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 673 return LHS.Value != RHS.Value; 674 } 675 std::string getAsString() const; 676 677 std::string getAsString(const PrintingPolicy &Policy) const { 678 std::string S; 679 getAsStringInternal(S, Policy); 680 return S; 681 } 682 void getAsStringInternal(std::string &Str, 683 const PrintingPolicy &Policy) const; 684 685 void dump(const char *s) const; 686 void dump() const; 687 688 void Profile(llvm::FoldingSetNodeID &ID) const { 689 ID.AddPointer(getAsOpaquePtr()); 690 } 691 692 /// getAddressSpace - Return the address space of this type. 693 inline unsigned getAddressSpace() const; 694 695 /// GCAttrTypesAttr - Returns gc attribute of this type. 696 inline Qualifiers::GC getObjCGCAttr() const; 697 698 /// isObjCGCWeak true when Type is objc's weak. 699 bool isObjCGCWeak() const { 700 return getObjCGCAttr() == Qualifiers::Weak; 701 } 702 703 /// isObjCGCStrong true when Type is objc's strong. 704 bool isObjCGCStrong() const { 705 return getObjCGCAttr() == Qualifiers::Strong; 706 } 707 708private: 709 // These methods are implemented in a separate translation unit; 710 // "static"-ize them to avoid creating temporary QualTypes in the 711 // caller. 712 static bool isConstant(QualType T, ASTContext& Ctx); 713 static QualType getDesugaredType(QualType T); 714}; 715 716} // end clang. 717 718namespace llvm { 719/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 720/// to a specific Type class. 721template<> struct simplify_type<const ::clang::QualType> { 722 typedef ::clang::Type* SimpleType; 723 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 724 return Val.getTypePtr(); 725 } 726}; 727template<> struct simplify_type< ::clang::QualType> 728 : public simplify_type<const ::clang::QualType> {}; 729 730// Teach SmallPtrSet that QualType is "basically a pointer". 731template<> 732class PointerLikeTypeTraits<clang::QualType> { 733public: 734 static inline void *getAsVoidPointer(clang::QualType P) { 735 return P.getAsOpaquePtr(); 736 } 737 static inline clang::QualType getFromVoidPointer(void *P) { 738 return clang::QualType::getFromOpaquePtr(P); 739 } 740 // Various qualifiers go in low bits. 741 enum { NumLowBitsAvailable = 0 }; 742}; 743 744} // end namespace llvm 745 746namespace clang { 747 748/// Type - This is the base class of the type hierarchy. A central concept 749/// with types is that each type always has a canonical type. A canonical type 750/// is the type with any typedef names stripped out of it or the types it 751/// references. For example, consider: 752/// 753/// typedef int foo; 754/// typedef foo* bar; 755/// 'int *' 'foo *' 'bar' 756/// 757/// There will be a Type object created for 'int'. Since int is canonical, its 758/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 759/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 760/// there is a PointerType that represents 'int*', which, like 'int', is 761/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 762/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 763/// is also 'int*'. 764/// 765/// Non-canonical types are useful for emitting diagnostics, without losing 766/// information about typedefs being used. Canonical types are useful for type 767/// comparisons (they allow by-pointer equality tests) and useful for reasoning 768/// about whether something has a particular form (e.g. is a function type), 769/// because they implicitly, recursively, strip all typedefs out of a type. 770/// 771/// Types, once created, are immutable. 772/// 773class Type { 774public: 775 enum TypeClass { 776#define TYPE(Class, Base) Class, 777#define LAST_TYPE(Class) TypeLast = Class, 778#define ABSTRACT_TYPE(Class, Base) 779#include "clang/AST/TypeNodes.def" 780 TagFirst = Record, TagLast = Enum 781 }; 782 783private: 784 Type(const Type&); // DO NOT IMPLEMENT. 785 void operator=(const Type&); // DO NOT IMPLEMENT. 786 787 QualType CanonicalType; 788 789 /// Bitfields required by the Type class. 790 class TypeBitfields { 791 friend class Type; 792 793 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 794 unsigned TC : 8; 795 796 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 797 /// Note that this should stay at the end of the ivars for Type so that 798 /// subclasses can pack their bitfields into the same word. 799 unsigned Dependent : 1; 800 801 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 802 unsigned VariablyModified : 1; 803 804 /// \brief Nonzero if the cache (i.e. the bitfields here starting 805 /// with 'Cache') is valid. If so, then this is a 806 /// LangOptions::VisibilityMode+1. 807 mutable unsigned CacheValidAndVisibility : 2; 808 809 /// \brief Linkage of this type. 810 mutable unsigned CachedLinkage : 2; 811 812 /// \brief Whether this type involves and local or unnamed types. 813 mutable unsigned CachedLocalOrUnnamed : 1; 814 815 /// \brief FromAST - Whether this type comes from an AST file. 816 mutable unsigned FromAST : 1; 817 818 bool isCacheValid() const { 819 return (CacheValidAndVisibility != 0); 820 } 821 Visibility getVisibility() const { 822 assert(isCacheValid() && "getting linkage from invalid cache"); 823 return static_cast<Visibility>(CacheValidAndVisibility-1); 824 } 825 Linkage getLinkage() const { 826 assert(isCacheValid() && "getting linkage from invalid cache"); 827 return static_cast<Linkage>(CachedLinkage); 828 } 829 bool hasLocalOrUnnamedType() const { 830 assert(isCacheValid() && "getting linkage from invalid cache"); 831 return CachedLocalOrUnnamed; 832 } 833 }; 834 enum { NumTypeBits = 16 }; 835 836protected: 837 // These classes allow subclasses to somewhat cleanly pack bitfields 838 // into Type. 839 840 class ArrayTypeBitfields { 841 friend class ArrayType; 842 843 unsigned : NumTypeBits; 844 845 /// IndexTypeQuals - CVR qualifiers from declarations like 846 /// 'int X[static restrict 4]'. For function parameters only. 847 unsigned IndexTypeQuals : 3; 848 849 /// SizeModifier - storage class qualifiers from declarations like 850 /// 'int X[static restrict 4]'. For function parameters only. 851 /// Actually an ArrayType::ArraySizeModifier. 852 unsigned SizeModifier : 3; 853 }; 854 855 class BuiltinTypeBitfields { 856 friend class BuiltinType; 857 858 unsigned : NumTypeBits; 859 860 /// The kind (BuiltinType::Kind) of builtin type this is. 861 unsigned Kind : 8; 862 }; 863 864 class FunctionTypeBitfields { 865 friend class FunctionType; 866 867 unsigned : NumTypeBits; 868 869 /// Extra information which affects how the function is called, like 870 /// regparm and the calling convention. 871 unsigned ExtInfo : 8; 872 873 /// A bit to be used by the subclass. 874 unsigned SubclassInfo : 1; 875 876 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 877 /// other bitfields. 878 /// The qualifiers are part of FunctionProtoType because... 879 /// 880 /// C++ 8.3.5p4: The return type, the parameter type list and the 881 /// cv-qualifier-seq, [...], are part of the function type. 882 unsigned TypeQuals : 3; 883 }; 884 885 class ObjCObjectTypeBitfields { 886 friend class ObjCObjectType; 887 888 unsigned : NumTypeBits; 889 890 /// NumProtocols - The number of protocols stored directly on this 891 /// object type. 892 unsigned NumProtocols : 32 - NumTypeBits; 893 }; 894 895 class ReferenceTypeBitfields { 896 friend class ReferenceType; 897 898 unsigned : NumTypeBits; 899 900 /// True if the type was originally spelled with an lvalue sigil. 901 /// This is never true of rvalue references but can also be false 902 /// on lvalue references because of C++0x [dcl.typedef]p9, 903 /// as follows: 904 /// 905 /// typedef int &ref; // lvalue, spelled lvalue 906 /// typedef int &&rvref; // rvalue 907 /// ref &a; // lvalue, inner ref, spelled lvalue 908 /// ref &&a; // lvalue, inner ref 909 /// rvref &a; // lvalue, inner ref, spelled lvalue 910 /// rvref &&a; // rvalue, inner ref 911 unsigned SpelledAsLValue : 1; 912 913 /// True if the inner type is a reference type. This only happens 914 /// in non-canonical forms. 915 unsigned InnerRef : 1; 916 }; 917 918 class TypeWithKeywordBitfields { 919 friend class TypeWithKeyword; 920 921 unsigned : NumTypeBits; 922 923 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 924 unsigned Keyword : 8; 925 }; 926 927 class VectorTypeBitfields { 928 friend class VectorType; 929 930 unsigned : NumTypeBits; 931 932 /// VecKind - The kind of vector, either a generic vector type or some 933 /// target-specific vector type such as for AltiVec or Neon. 934 unsigned VecKind : 3; 935 936 /// NumElements - The number of elements in the vector. 937 unsigned NumElements : 29 - NumTypeBits; 938 }; 939 940 union { 941 TypeBitfields TypeBits; 942 ArrayTypeBitfields ArrayTypeBits; 943 BuiltinTypeBitfields BuiltinTypeBits; 944 FunctionTypeBitfields FunctionTypeBits; 945 ObjCObjectTypeBitfields ObjCObjectTypeBits; 946 ReferenceTypeBitfields ReferenceTypeBits; 947 TypeWithKeywordBitfields TypeWithKeywordBits; 948 VectorTypeBitfields VectorTypeBits; 949 }; 950 951private: 952 /// \brief Set whether this type comes from an AST file. 953 void setFromAST(bool V = true) const { 954 TypeBits.FromAST = V; 955 } 956 957 void ensureCachedProperties() const; 958 959protected: 960 /// \brief Compute the cached properties of this type. 961 class CachedProperties { 962 char linkage; 963 char visibility; 964 bool local; 965 966 public: 967 CachedProperties(Linkage linkage, Visibility visibility, bool local) 968 : linkage(linkage), visibility(visibility), local(local) {} 969 970 Linkage getLinkage() const { return (Linkage) linkage; } 971 Visibility getVisibility() const { return (Visibility) visibility; } 972 bool hasLocalOrUnnamedType() const { return local; } 973 974 friend CachedProperties merge(CachedProperties L, CachedProperties R) { 975 return CachedProperties(minLinkage(L.getLinkage(), R.getLinkage()), 976 minVisibility(L.getVisibility(), R.getVisibility()), 977 L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType()); 978 } 979 }; 980 981 virtual CachedProperties getCachedProperties() const; 982 static CachedProperties getCachedProperties(QualType T) { 983 return getCachedProperties(T.getTypePtr()); 984 } 985 static CachedProperties getCachedProperties(const Type *T); 986 987 // silence VC++ warning C4355: 'this' : used in base member initializer list 988 Type *this_() { return this; } 989 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified) 990 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical) { 991 TypeBits.TC = tc; 992 TypeBits.Dependent = Dependent; 993 TypeBits.VariablyModified = VariablyModified; 994 TypeBits.CacheValidAndVisibility = 0; 995 TypeBits.CachedLocalOrUnnamed = false; 996 TypeBits.CachedLinkage = NoLinkage; 997 TypeBits.FromAST = false; 998 } 999 virtual ~Type(); 1000 friend class ASTContext; 1001 1002 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1003 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1004 1005public: 1006 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1007 1008 /// \brief Whether this type comes from an AST file. 1009 bool isFromAST() const { return TypeBits.FromAST; } 1010 1011 bool isCanonicalUnqualified() const { 1012 return CanonicalType.getTypePtr() == this; 1013 } 1014 1015 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1016 /// object types, function types, and incomplete types. 1017 1018 /// isIncompleteType - Return true if this is an incomplete type. 1019 /// A type that can describe objects, but which lacks information needed to 1020 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1021 /// routine will need to determine if the size is actually required. 1022 bool isIncompleteType() const; 1023 1024 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1025 /// type, in other words, not a function type. 1026 bool isIncompleteOrObjectType() const { 1027 return !isFunctionType(); 1028 } 1029 1030 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1031 bool isPODType() const; 1032 1033 /// isLiteralType - Return true if this is a literal type 1034 /// (C++0x [basic.types]p10) 1035 bool isLiteralType() const; 1036 1037 /// Helper methods to distinguish type categories. All type predicates 1038 /// operate on the canonical type, ignoring typedefs and qualifiers. 1039 1040 /// isBuiltinType - returns true if the type is a builtin type. 1041 bool isBuiltinType() const; 1042 1043 /// isSpecificBuiltinType - Test for a particular builtin type. 1044 bool isSpecificBuiltinType(unsigned K) const; 1045 1046 /// isPlaceholderType - Test for a type which does not represent an 1047 /// actual type-system type but is instead used as a placeholder for 1048 /// various convenient purposes within Clang. All such types are 1049 /// BuiltinTypes. 1050 bool isPlaceholderType() const; 1051 1052 /// isIntegerType() does *not* include complex integers (a GCC extension). 1053 /// isComplexIntegerType() can be used to test for complex integers. 1054 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1055 bool isEnumeralType() const; 1056 bool isBooleanType() const; 1057 bool isCharType() const; 1058 bool isWideCharType() const; 1059 bool isAnyCharacterType() const; 1060 bool isIntegralType(ASTContext &Ctx) const; 1061 1062 /// \brief Determine whether this type is an integral or enumeration type. 1063 bool isIntegralOrEnumerationType() const; 1064 /// \brief Determine whether this type is an integral or unscoped enumeration 1065 /// type. 1066 bool isIntegralOrUnscopedEnumerationType() const; 1067 1068 /// Floating point categories. 1069 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1070 /// isComplexType() does *not* include complex integers (a GCC extension). 1071 /// isComplexIntegerType() can be used to test for complex integers. 1072 bool isComplexType() const; // C99 6.2.5p11 (complex) 1073 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1074 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1075 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1076 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1077 bool isVoidType() const; // C99 6.2.5p19 1078 bool isDerivedType() const; // C99 6.2.5p20 1079 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1080 bool isAggregateType() const; 1081 1082 // Type Predicates: Check to see if this type is structurally the specified 1083 // type, ignoring typedefs and qualifiers. 1084 bool isFunctionType() const; 1085 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1086 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1087 bool isPointerType() const; 1088 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1089 bool isBlockPointerType() const; 1090 bool isVoidPointerType() const; 1091 bool isReferenceType() const; 1092 bool isLValueReferenceType() const; 1093 bool isRValueReferenceType() const; 1094 bool isFunctionPointerType() const; 1095 bool isMemberPointerType() const; 1096 bool isMemberFunctionPointerType() const; 1097 bool isMemberDataPointerType() const; 1098 bool isArrayType() const; 1099 bool isConstantArrayType() const; 1100 bool isIncompleteArrayType() const; 1101 bool isVariableArrayType() const; 1102 bool isDependentSizedArrayType() const; 1103 bool isRecordType() const; 1104 bool isClassType() const; 1105 bool isStructureType() const; 1106 bool isStructureOrClassType() const; 1107 bool isUnionType() const; 1108 bool isComplexIntegerType() const; // GCC _Complex integer type. 1109 bool isVectorType() const; // GCC vector type. 1110 bool isExtVectorType() const; // Extended vector type. 1111 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1112 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1113 // for the common case. 1114 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1115 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1116 bool isObjCQualifiedIdType() const; // id<foo> 1117 bool isObjCQualifiedClassType() const; // Class<foo> 1118 bool isObjCObjectOrInterfaceType() const; 1119 bool isObjCIdType() const; // id 1120 bool isObjCClassType() const; // Class 1121 bool isObjCSelType() const; // Class 1122 bool isObjCBuiltinType() const; // 'id' or 'Class' 1123 bool isTemplateTypeParmType() const; // C++ template type parameter 1124 bool isNullPtrType() const; // C++0x nullptr_t 1125 1126 /// isDependentType - Whether this type is a dependent type, meaning 1127 /// that its definition somehow depends on a template parameter 1128 /// (C++ [temp.dep.type]). 1129 bool isDependentType() const { return TypeBits.Dependent; } 1130 1131 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1132 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1133 1134 /// \brief Whether this type is or contains a local or unnamed type. 1135 bool hasUnnamedOrLocalType() const; 1136 1137 bool isOverloadableType() const; 1138 1139 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1140 bool isElaboratedTypeSpecifier() const; 1141 1142 /// hasPointerRepresentation - Whether this type is represented 1143 /// natively as a pointer; this includes pointers, references, block 1144 /// pointers, and Objective-C interface, qualified id, and qualified 1145 /// interface types, as well as nullptr_t. 1146 bool hasPointerRepresentation() const; 1147 1148 /// hasObjCPointerRepresentation - Whether this type can represent 1149 /// an objective pointer type for the purpose of GC'ability 1150 bool hasObjCPointerRepresentation() const; 1151 1152 /// \brief Determine whether this type has an integer representation 1153 /// of some sort, e.g., it is an integer type or a vector. 1154 bool hasIntegerRepresentation() const; 1155 1156 /// \brief Determine whether this type has an signed integer representation 1157 /// of some sort, e.g., it is an signed integer type or a vector. 1158 bool hasSignedIntegerRepresentation() const; 1159 1160 /// \brief Determine whether this type has an unsigned integer representation 1161 /// of some sort, e.g., it is an unsigned integer type or a vector. 1162 bool hasUnsignedIntegerRepresentation() const; 1163 1164 /// \brief Determine whether this type has a floating-point representation 1165 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1166 bool hasFloatingRepresentation() const; 1167 1168 // Type Checking Functions: Check to see if this type is structurally the 1169 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1170 // the best type we can. 1171 const RecordType *getAsStructureType() const; 1172 /// NOTE: getAs*ArrayType are methods on ASTContext. 1173 const RecordType *getAsUnionType() const; 1174 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1175 // The following is a convenience method that returns an ObjCObjectPointerType 1176 // for object declared using an interface. 1177 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1178 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1179 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1180 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1181 1182 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1183 /// because the type is a RecordType or because it is the injected-class-name 1184 /// type of a class template or class template partial specialization. 1185 CXXRecordDecl *getAsCXXRecordDecl() const; 1186 1187 // Member-template getAs<specific type>'. Look through sugar for 1188 // an instance of <specific type>. This scheme will eventually 1189 // replace the specific getAsXXXX methods above. 1190 // 1191 // There are some specializations of this member template listed 1192 // immediately following this class. 1193 template <typename T> const T *getAs() const; 1194 1195 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1196 /// element type of the array, potentially with type qualifiers missing. 1197 /// This method should never be used when type qualifiers are meaningful. 1198 const Type *getArrayElementTypeNoTypeQual() const; 1199 1200 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1201 /// pointer, this returns the respective pointee. 1202 QualType getPointeeType() const; 1203 1204 /// getUnqualifiedDesugaredType() - Return the specified type with 1205 /// any "sugar" removed from the type, removing any typedefs, 1206 /// typeofs, etc., as well as any qualifiers. 1207 const Type *getUnqualifiedDesugaredType() const; 1208 1209 /// More type predicates useful for type checking/promotion 1210 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1211 1212 /// isSignedIntegerType - Return true if this is an integer type that is 1213 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1214 /// an enum decl which has a signed representation, or a vector of signed 1215 /// integer element type. 1216 bool isSignedIntegerType() const; 1217 1218 /// isUnsignedIntegerType - Return true if this is an integer type that is 1219 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1220 /// decl which has an unsigned representation, or a vector of unsigned integer 1221 /// element type. 1222 bool isUnsignedIntegerType() const; 1223 1224 /// isConstantSizeType - Return true if this is not a variable sized type, 1225 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1226 /// incomplete types. 1227 bool isConstantSizeType() const; 1228 1229 /// isSpecifierType - Returns true if this type can be represented by some 1230 /// set of type specifiers. 1231 bool isSpecifierType() const; 1232 1233 /// \brief Determine the linkage of this type. 1234 Linkage getLinkage() const; 1235 1236 /// \brief Determine the visibility of this type. 1237 Visibility getVisibility() const; 1238 1239 /// \brief Determine the linkage and visibility of this type. 1240 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1241 1242 /// \brief Note that the linkage is no longer known. 1243 void ClearLinkageCache(); 1244 1245 const char *getTypeClassName() const; 1246 1247 QualType getCanonicalTypeInternal() const { 1248 return CanonicalType; 1249 } 1250 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1251 void dump() const; 1252 static bool classof(const Type *) { return true; } 1253 1254 friend class ASTReader; 1255 friend class ASTWriter; 1256}; 1257 1258template <> inline const TypedefType *Type::getAs() const { 1259 return dyn_cast<TypedefType>(this); 1260} 1261 1262// We can do canonical leaf types faster, because we don't have to 1263// worry about preserving child type decoration. 1264#define TYPE(Class, Base) 1265#define LEAF_TYPE(Class) \ 1266template <> inline const Class##Type *Type::getAs() const { \ 1267 return dyn_cast<Class##Type>(CanonicalType); \ 1268} 1269#include "clang/AST/TypeNodes.def" 1270 1271 1272/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1273/// types are always canonical and have a literal name field. 1274class BuiltinType : public Type { 1275public: 1276 enum Kind { 1277 Void, 1278 1279 Bool, // This is bool and/or _Bool. 1280 Char_U, // This is 'char' for targets where char is unsigned. 1281 UChar, // This is explicitly qualified unsigned char. 1282 Char16, // This is 'char16_t' for C++. 1283 Char32, // This is 'char32_t' for C++. 1284 UShort, 1285 UInt, 1286 ULong, 1287 ULongLong, 1288 UInt128, // __uint128_t 1289 1290 Char_S, // This is 'char' for targets where char is signed. 1291 SChar, // This is explicitly qualified signed char. 1292 WChar, // This is 'wchar_t' for C++. 1293 Short, 1294 Int, 1295 Long, 1296 LongLong, 1297 Int128, // __int128_t 1298 1299 Float, Double, LongDouble, 1300 1301 NullPtr, // This is the type of C++0x 'nullptr'. 1302 1303 /// This represents the type of an expression whose type is 1304 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1305 /// appear in situations where the structure of the type is 1306 /// theoretically deducible. 1307 Dependent, 1308 1309 Overload, // This represents the type of an overloaded function declaration. 1310 1311 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1312 // that has not been deduced yet. 1313 1314 /// The primitive Objective C 'id' type. The type pointed to by the 1315 /// user-visible 'id' type. Only ever shows up in an AST as the base 1316 /// type of an ObjCObjectType. 1317 ObjCId, 1318 1319 /// The primitive Objective C 'Class' type. The type pointed to by the 1320 /// user-visible 'Class' type. Only ever shows up in an AST as the 1321 /// base type of an ObjCObjectType. 1322 ObjCClass, 1323 1324 ObjCSel // This represents the ObjC 'SEL' type. 1325 }; 1326 1327protected: 1328 virtual CachedProperties getCachedProperties() const; 1329 1330public: 1331 BuiltinType(Kind K) 1332 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1333 /*VariablyModified=*/false) { 1334 BuiltinTypeBits.Kind = K; 1335 } 1336 1337 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1338 const char *getName(const LangOptions &LO) const; 1339 1340 bool isSugared() const { return false; } 1341 QualType desugar() const { return QualType(this, 0); } 1342 1343 bool isInteger() const { 1344 return getKind() >= Bool && getKind() <= Int128; 1345 } 1346 1347 bool isSignedInteger() const { 1348 return getKind() >= Char_S && getKind() <= Int128; 1349 } 1350 1351 bool isUnsignedInteger() const { 1352 return getKind() >= Bool && getKind() <= UInt128; 1353 } 1354 1355 bool isFloatingPoint() const { 1356 return getKind() >= Float && getKind() <= LongDouble; 1357 } 1358 1359 /// Determines whether this type is a "forbidden" placeholder type, 1360 /// i.e. a type which cannot appear in arbitrary positions in a 1361 /// fully-formed expression. 1362 bool isPlaceholderType() const { 1363 return getKind() == Overload || 1364 getKind() == UndeducedAuto; 1365 } 1366 1367 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1368 static bool classof(const BuiltinType *) { return true; } 1369}; 1370 1371/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1372/// types (_Complex float etc) as well as the GCC integer complex extensions. 1373/// 1374class ComplexType : public Type, public llvm::FoldingSetNode { 1375 QualType ElementType; 1376 ComplexType(QualType Element, QualType CanonicalPtr) : 1377 Type(Complex, CanonicalPtr, Element->isDependentType(), 1378 Element->isVariablyModifiedType()), 1379 ElementType(Element) { 1380 } 1381 friend class ASTContext; // ASTContext creates these. 1382 1383protected: 1384 virtual CachedProperties getCachedProperties() const; 1385 1386public: 1387 QualType getElementType() const { return ElementType; } 1388 1389 bool isSugared() const { return false; } 1390 QualType desugar() const { return QualType(this, 0); } 1391 1392 void Profile(llvm::FoldingSetNodeID &ID) { 1393 Profile(ID, getElementType()); 1394 } 1395 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1396 ID.AddPointer(Element.getAsOpaquePtr()); 1397 } 1398 1399 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1400 static bool classof(const ComplexType *) { return true; } 1401}; 1402 1403/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1404/// 1405class PointerType : public Type, public llvm::FoldingSetNode { 1406 QualType PointeeType; 1407 1408 PointerType(QualType Pointee, QualType CanonicalPtr) : 1409 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1410 Pointee->isVariablyModifiedType()), 1411 PointeeType(Pointee) { 1412 } 1413 friend class ASTContext; // ASTContext creates these. 1414 1415protected: 1416 virtual CachedProperties getCachedProperties() const; 1417 1418public: 1419 1420 QualType getPointeeType() const { return PointeeType; } 1421 1422 bool isSugared() const { return false; } 1423 QualType desugar() const { return QualType(this, 0); } 1424 1425 void Profile(llvm::FoldingSetNodeID &ID) { 1426 Profile(ID, getPointeeType()); 1427 } 1428 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1429 ID.AddPointer(Pointee.getAsOpaquePtr()); 1430 } 1431 1432 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1433 static bool classof(const PointerType *) { return true; } 1434}; 1435 1436/// BlockPointerType - pointer to a block type. 1437/// This type is to represent types syntactically represented as 1438/// "void (^)(int)", etc. Pointee is required to always be a function type. 1439/// 1440class BlockPointerType : public Type, public llvm::FoldingSetNode { 1441 QualType PointeeType; // Block is some kind of pointer type 1442 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1443 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1444 Pointee->isVariablyModifiedType()), 1445 PointeeType(Pointee) { 1446 } 1447 friend class ASTContext; // ASTContext creates these. 1448 1449protected: 1450 virtual CachedProperties getCachedProperties() const; 1451 1452public: 1453 1454 // Get the pointee type. Pointee is required to always be a function type. 1455 QualType getPointeeType() const { return PointeeType; } 1456 1457 bool isSugared() const { return false; } 1458 QualType desugar() const { return QualType(this, 0); } 1459 1460 void Profile(llvm::FoldingSetNodeID &ID) { 1461 Profile(ID, getPointeeType()); 1462 } 1463 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1464 ID.AddPointer(Pointee.getAsOpaquePtr()); 1465 } 1466 1467 static bool classof(const Type *T) { 1468 return T->getTypeClass() == BlockPointer; 1469 } 1470 static bool classof(const BlockPointerType *) { return true; } 1471}; 1472 1473/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1474/// 1475class ReferenceType : public Type, public llvm::FoldingSetNode { 1476 QualType PointeeType; 1477 1478protected: 1479 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1480 bool SpelledAsLValue) : 1481 Type(tc, CanonicalRef, Referencee->isDependentType(), 1482 Referencee->isVariablyModifiedType()), PointeeType(Referencee) { 1483 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1484 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1485 } 1486 1487 virtual CachedProperties getCachedProperties() const; 1488 1489public: 1490 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1491 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1492 1493 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1494 QualType getPointeeType() const { 1495 // FIXME: this might strip inner qualifiers; okay? 1496 const ReferenceType *T = this; 1497 while (T->isInnerRef()) 1498 T = T->PointeeType->getAs<ReferenceType>(); 1499 return T->PointeeType; 1500 } 1501 1502 void Profile(llvm::FoldingSetNodeID &ID) { 1503 Profile(ID, PointeeType, isSpelledAsLValue()); 1504 } 1505 static void Profile(llvm::FoldingSetNodeID &ID, 1506 QualType Referencee, 1507 bool SpelledAsLValue) { 1508 ID.AddPointer(Referencee.getAsOpaquePtr()); 1509 ID.AddBoolean(SpelledAsLValue); 1510 } 1511 1512 static bool classof(const Type *T) { 1513 return T->getTypeClass() == LValueReference || 1514 T->getTypeClass() == RValueReference; 1515 } 1516 static bool classof(const ReferenceType *) { return true; } 1517}; 1518 1519/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1520/// 1521class LValueReferenceType : public ReferenceType { 1522 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1523 bool SpelledAsLValue) : 1524 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1525 {} 1526 friend class ASTContext; // ASTContext creates these 1527public: 1528 bool isSugared() const { return false; } 1529 QualType desugar() const { return QualType(this, 0); } 1530 1531 static bool classof(const Type *T) { 1532 return T->getTypeClass() == LValueReference; 1533 } 1534 static bool classof(const LValueReferenceType *) { return true; } 1535}; 1536 1537/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1538/// 1539class RValueReferenceType : public ReferenceType { 1540 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1541 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1542 } 1543 friend class ASTContext; // ASTContext creates these 1544public: 1545 bool isSugared() const { return false; } 1546 QualType desugar() const { return QualType(this, 0); } 1547 1548 static bool classof(const Type *T) { 1549 return T->getTypeClass() == RValueReference; 1550 } 1551 static bool classof(const RValueReferenceType *) { return true; } 1552}; 1553 1554/// MemberPointerType - C++ 8.3.3 - Pointers to members 1555/// 1556class MemberPointerType : public Type, public llvm::FoldingSetNode { 1557 QualType PointeeType; 1558 /// The class of which the pointee is a member. Must ultimately be a 1559 /// RecordType, but could be a typedef or a template parameter too. 1560 const Type *Class; 1561 1562 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1563 Type(MemberPointer, CanonicalPtr, 1564 Cls->isDependentType() || Pointee->isDependentType(), 1565 Pointee->isVariablyModifiedType()), 1566 PointeeType(Pointee), Class(Cls) { 1567 } 1568 friend class ASTContext; // ASTContext creates these. 1569 1570protected: 1571 virtual CachedProperties getCachedProperties() const; 1572 1573public: 1574 QualType getPointeeType() const { return PointeeType; } 1575 1576 /// Returns true if the member type (i.e. the pointee type) is a 1577 /// function type rather than a data-member type. 1578 bool isMemberFunctionPointer() const { 1579 return PointeeType->isFunctionProtoType(); 1580 } 1581 1582 /// Returns true if the member type (i.e. the pointee type) is a 1583 /// data type rather than a function type. 1584 bool isMemberDataPointer() const { 1585 return !PointeeType->isFunctionProtoType(); 1586 } 1587 1588 const Type *getClass() const { return Class; } 1589 1590 bool isSugared() const { return false; } 1591 QualType desugar() const { return QualType(this, 0); } 1592 1593 void Profile(llvm::FoldingSetNodeID &ID) { 1594 Profile(ID, getPointeeType(), getClass()); 1595 } 1596 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1597 const Type *Class) { 1598 ID.AddPointer(Pointee.getAsOpaquePtr()); 1599 ID.AddPointer(Class); 1600 } 1601 1602 static bool classof(const Type *T) { 1603 return T->getTypeClass() == MemberPointer; 1604 } 1605 static bool classof(const MemberPointerType *) { return true; } 1606}; 1607 1608/// ArrayType - C99 6.7.5.2 - Array Declarators. 1609/// 1610class ArrayType : public Type, public llvm::FoldingSetNode { 1611public: 1612 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1613 /// an array with a static size (e.g. int X[static 4]), or an array 1614 /// with a star size (e.g. int X[*]). 1615 /// 'static' is only allowed on function parameters. 1616 enum ArraySizeModifier { 1617 Normal, Static, Star 1618 }; 1619private: 1620 /// ElementType - The element type of the array. 1621 QualType ElementType; 1622 1623protected: 1624 // C++ [temp.dep.type]p1: 1625 // A type is dependent if it is... 1626 // - an array type constructed from any dependent type or whose 1627 // size is specified by a constant expression that is 1628 // value-dependent, 1629 ArrayType(TypeClass tc, QualType et, QualType can, 1630 ArraySizeModifier sm, unsigned tq) 1631 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1632 (tc == VariableArray || et->isVariablyModifiedType())), 1633 ElementType(et) { 1634 ArrayTypeBits.IndexTypeQuals = tq; 1635 ArrayTypeBits.SizeModifier = sm; 1636 } 1637 1638 friend class ASTContext; // ASTContext creates these. 1639 1640 virtual CachedProperties getCachedProperties() const; 1641 1642public: 1643 QualType getElementType() const { return ElementType; } 1644 ArraySizeModifier getSizeModifier() const { 1645 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1646 } 1647 Qualifiers getIndexTypeQualifiers() const { 1648 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1649 } 1650 unsigned getIndexTypeCVRQualifiers() const { 1651 return ArrayTypeBits.IndexTypeQuals; 1652 } 1653 1654 static bool classof(const Type *T) { 1655 return T->getTypeClass() == ConstantArray || 1656 T->getTypeClass() == VariableArray || 1657 T->getTypeClass() == IncompleteArray || 1658 T->getTypeClass() == DependentSizedArray; 1659 } 1660 static bool classof(const ArrayType *) { return true; } 1661}; 1662 1663/// ConstantArrayType - This class represents the canonical version of 1664/// C arrays with a specified constant size. For example, the canonical 1665/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1666/// type is 'int' and the size is 404. 1667class ConstantArrayType : public ArrayType { 1668 llvm::APInt Size; // Allows us to unique the type. 1669 1670 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1671 ArraySizeModifier sm, unsigned tq) 1672 : ArrayType(ConstantArray, et, can, sm, tq), 1673 Size(size) {} 1674protected: 1675 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1676 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1677 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1678 friend class ASTContext; // ASTContext creates these. 1679public: 1680 const llvm::APInt &getSize() const { return Size; } 1681 bool isSugared() const { return false; } 1682 QualType desugar() const { return QualType(this, 0); } 1683 1684 1685 /// \brief Determine the number of bits required to address a member of 1686 // an array with the given element type and number of elements. 1687 static unsigned getNumAddressingBits(ASTContext &Context, 1688 QualType ElementType, 1689 const llvm::APInt &NumElements); 1690 1691 /// \brief Determine the maximum number of active bits that an array's size 1692 /// can require, which limits the maximum size of the array. 1693 static unsigned getMaxSizeBits(ASTContext &Context); 1694 1695 void Profile(llvm::FoldingSetNodeID &ID) { 1696 Profile(ID, getElementType(), getSize(), 1697 getSizeModifier(), getIndexTypeCVRQualifiers()); 1698 } 1699 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1700 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1701 unsigned TypeQuals) { 1702 ID.AddPointer(ET.getAsOpaquePtr()); 1703 ID.AddInteger(ArraySize.getZExtValue()); 1704 ID.AddInteger(SizeMod); 1705 ID.AddInteger(TypeQuals); 1706 } 1707 static bool classof(const Type *T) { 1708 return T->getTypeClass() == ConstantArray; 1709 } 1710 static bool classof(const ConstantArrayType *) { return true; } 1711}; 1712 1713/// IncompleteArrayType - This class represents C arrays with an unspecified 1714/// size. For example 'int A[]' has an IncompleteArrayType where the element 1715/// type is 'int' and the size is unspecified. 1716class IncompleteArrayType : public ArrayType { 1717 1718 IncompleteArrayType(QualType et, QualType can, 1719 ArraySizeModifier sm, unsigned tq) 1720 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1721 friend class ASTContext; // ASTContext creates these. 1722public: 1723 bool isSugared() const { return false; } 1724 QualType desugar() const { return QualType(this, 0); } 1725 1726 static bool classof(const Type *T) { 1727 return T->getTypeClass() == IncompleteArray; 1728 } 1729 static bool classof(const IncompleteArrayType *) { return true; } 1730 1731 friend class StmtIteratorBase; 1732 1733 void Profile(llvm::FoldingSetNodeID &ID) { 1734 Profile(ID, getElementType(), getSizeModifier(), 1735 getIndexTypeCVRQualifiers()); 1736 } 1737 1738 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1739 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1740 ID.AddPointer(ET.getAsOpaquePtr()); 1741 ID.AddInteger(SizeMod); 1742 ID.AddInteger(TypeQuals); 1743 } 1744}; 1745 1746/// VariableArrayType - This class represents C arrays with a specified size 1747/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1748/// Since the size expression is an arbitrary expression, we store it as such. 1749/// 1750/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1751/// should not be: two lexically equivalent variable array types could mean 1752/// different things, for example, these variables do not have the same type 1753/// dynamically: 1754/// 1755/// void foo(int x) { 1756/// int Y[x]; 1757/// ++x; 1758/// int Z[x]; 1759/// } 1760/// 1761class VariableArrayType : public ArrayType { 1762 /// SizeExpr - An assignment expression. VLA's are only permitted within 1763 /// a function block. 1764 Stmt *SizeExpr; 1765 /// Brackets - The left and right array brackets. 1766 SourceRange Brackets; 1767 1768 VariableArrayType(QualType et, QualType can, Expr *e, 1769 ArraySizeModifier sm, unsigned tq, 1770 SourceRange brackets) 1771 : ArrayType(VariableArray, et, can, sm, tq), 1772 SizeExpr((Stmt*) e), Brackets(brackets) {} 1773 friend class ASTContext; // ASTContext creates these. 1774 1775public: 1776 Expr *getSizeExpr() const { 1777 // We use C-style casts instead of cast<> here because we do not wish 1778 // to have a dependency of Type.h on Stmt.h/Expr.h. 1779 return (Expr*) SizeExpr; 1780 } 1781 SourceRange getBracketsRange() const { return Brackets; } 1782 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1783 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1784 1785 bool isSugared() const { return false; } 1786 QualType desugar() const { return QualType(this, 0); } 1787 1788 static bool classof(const Type *T) { 1789 return T->getTypeClass() == VariableArray; 1790 } 1791 static bool classof(const VariableArrayType *) { return true; } 1792 1793 friend class StmtIteratorBase; 1794 1795 void Profile(llvm::FoldingSetNodeID &ID) { 1796 assert(0 && "Cannnot unique VariableArrayTypes."); 1797 } 1798}; 1799 1800/// DependentSizedArrayType - This type represents an array type in 1801/// C++ whose size is a value-dependent expression. For example: 1802/// 1803/// \code 1804/// template<typename T, int Size> 1805/// class array { 1806/// T data[Size]; 1807/// }; 1808/// \endcode 1809/// 1810/// For these types, we won't actually know what the array bound is 1811/// until template instantiation occurs, at which point this will 1812/// become either a ConstantArrayType or a VariableArrayType. 1813class DependentSizedArrayType : public ArrayType { 1814 ASTContext &Context; 1815 1816 /// \brief An assignment expression that will instantiate to the 1817 /// size of the array. 1818 /// 1819 /// The expression itself might be NULL, in which case the array 1820 /// type will have its size deduced from an initializer. 1821 Stmt *SizeExpr; 1822 1823 /// Brackets - The left and right array brackets. 1824 SourceRange Brackets; 1825 1826 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1827 Expr *e, ArraySizeModifier sm, unsigned tq, 1828 SourceRange brackets) 1829 : ArrayType(DependentSizedArray, et, can, sm, tq), 1830 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1831 friend class ASTContext; // ASTContext creates these. 1832 1833public: 1834 Expr *getSizeExpr() const { 1835 // We use C-style casts instead of cast<> here because we do not wish 1836 // to have a dependency of Type.h on Stmt.h/Expr.h. 1837 return (Expr*) SizeExpr; 1838 } 1839 SourceRange getBracketsRange() const { return Brackets; } 1840 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1841 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1842 1843 bool isSugared() const { return false; } 1844 QualType desugar() const { return QualType(this, 0); } 1845 1846 static bool classof(const Type *T) { 1847 return T->getTypeClass() == DependentSizedArray; 1848 } 1849 static bool classof(const DependentSizedArrayType *) { return true; } 1850 1851 friend class StmtIteratorBase; 1852 1853 1854 void Profile(llvm::FoldingSetNodeID &ID) { 1855 Profile(ID, Context, getElementType(), 1856 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1857 } 1858 1859 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1860 QualType ET, ArraySizeModifier SizeMod, 1861 unsigned TypeQuals, Expr *E); 1862}; 1863 1864/// DependentSizedExtVectorType - This type represent an extended vector type 1865/// where either the type or size is dependent. For example: 1866/// @code 1867/// template<typename T, int Size> 1868/// class vector { 1869/// typedef T __attribute__((ext_vector_type(Size))) type; 1870/// } 1871/// @endcode 1872class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1873 ASTContext &Context; 1874 Expr *SizeExpr; 1875 /// ElementType - The element type of the array. 1876 QualType ElementType; 1877 SourceLocation loc; 1878 1879 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1880 QualType can, Expr *SizeExpr, SourceLocation loc) 1881 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 1882 ElementType->isVariablyModifiedType()), 1883 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1884 loc(loc) {} 1885 friend class ASTContext; 1886 1887public: 1888 Expr *getSizeExpr() const { return SizeExpr; } 1889 QualType getElementType() const { return ElementType; } 1890 SourceLocation getAttributeLoc() const { return loc; } 1891 1892 bool isSugared() const { return false; } 1893 QualType desugar() const { return QualType(this, 0); } 1894 1895 static bool classof(const Type *T) { 1896 return T->getTypeClass() == DependentSizedExtVector; 1897 } 1898 static bool classof(const DependentSizedExtVectorType *) { return true; } 1899 1900 void Profile(llvm::FoldingSetNodeID &ID) { 1901 Profile(ID, Context, getElementType(), getSizeExpr()); 1902 } 1903 1904 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1905 QualType ElementType, Expr *SizeExpr); 1906}; 1907 1908 1909/// VectorType - GCC generic vector type. This type is created using 1910/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1911/// bytes; or from an Altivec __vector or vector declaration. 1912/// Since the constructor takes the number of vector elements, the 1913/// client is responsible for converting the size into the number of elements. 1914class VectorType : public Type, public llvm::FoldingSetNode { 1915public: 1916 enum VectorKind { 1917 GenericVector, // not a target-specific vector type 1918 AltiVecVector, // is AltiVec vector 1919 AltiVecPixel, // is AltiVec 'vector Pixel' 1920 AltiVecBool, // is AltiVec 'vector bool ...' 1921 NeonVector, // is ARM Neon vector 1922 NeonPolyVector // is ARM Neon polynomial vector 1923 }; 1924protected: 1925 /// ElementType - The element type of the vector. 1926 QualType ElementType; 1927 1928 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1929 VectorKind vecKind) : 1930 Type(Vector, canonType, vecType->isDependentType(), 1931 vecType->isVariablyModifiedType()), ElementType(vecType) { 1932 VectorTypeBits.VecKind = vecKind; 1933 VectorTypeBits.NumElements = nElements; 1934 } 1935 1936 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1937 QualType canonType, VectorKind vecKind) 1938 : Type(tc, canonType, vecType->isDependentType(), 1939 vecType->isVariablyModifiedType()), ElementType(vecType) { 1940 VectorTypeBits.VecKind = vecKind; 1941 VectorTypeBits.NumElements = nElements; 1942 } 1943 friend class ASTContext; // ASTContext creates these. 1944 1945 virtual CachedProperties getCachedProperties() const; 1946 1947public: 1948 1949 QualType getElementType() const { return ElementType; } 1950 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 1951 1952 bool isSugared() const { return false; } 1953 QualType desugar() const { return QualType(this, 0); } 1954 1955 VectorKind getVectorKind() const { 1956 return VectorKind(VectorTypeBits.VecKind); 1957 } 1958 1959 void Profile(llvm::FoldingSetNodeID &ID) { 1960 Profile(ID, getElementType(), getNumElements(), 1961 getTypeClass(), getVectorKind()); 1962 } 1963 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1964 unsigned NumElements, TypeClass TypeClass, 1965 VectorKind VecKind) { 1966 ID.AddPointer(ElementType.getAsOpaquePtr()); 1967 ID.AddInteger(NumElements); 1968 ID.AddInteger(TypeClass); 1969 ID.AddInteger(VecKind); 1970 } 1971 1972 static bool classof(const Type *T) { 1973 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1974 } 1975 static bool classof(const VectorType *) { return true; } 1976}; 1977 1978/// ExtVectorType - Extended vector type. This type is created using 1979/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1980/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1981/// class enables syntactic extensions, like Vector Components for accessing 1982/// points, colors, and textures (modeled after OpenGL Shading Language). 1983class ExtVectorType : public VectorType { 1984 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1985 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 1986 friend class ASTContext; // ASTContext creates these. 1987public: 1988 static int getPointAccessorIdx(char c) { 1989 switch (c) { 1990 default: return -1; 1991 case 'x': case 'r': return 0; 1992 case 'y': case 'g': return 1; 1993 case 'z': case 'b': return 2; 1994 case 'w': case 'a': return 3; 1995 } 1996 } 1997 static int getNumericAccessorIdx(char c) { 1998 switch (c) { 1999 default: return -1; 2000 case '0': return 0; 2001 case '1': return 1; 2002 case '2': return 2; 2003 case '3': return 3; 2004 case '4': return 4; 2005 case '5': return 5; 2006 case '6': return 6; 2007 case '7': return 7; 2008 case '8': return 8; 2009 case '9': return 9; 2010 case 'A': 2011 case 'a': return 10; 2012 case 'B': 2013 case 'b': return 11; 2014 case 'C': 2015 case 'c': return 12; 2016 case 'D': 2017 case 'd': return 13; 2018 case 'E': 2019 case 'e': return 14; 2020 case 'F': 2021 case 'f': return 15; 2022 } 2023 } 2024 2025 static int getAccessorIdx(char c) { 2026 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2027 return getNumericAccessorIdx(c); 2028 } 2029 2030 bool isAccessorWithinNumElements(char c) const { 2031 if (int idx = getAccessorIdx(c)+1) 2032 return unsigned(idx-1) < getNumElements(); 2033 return false; 2034 } 2035 bool isSugared() const { return false; } 2036 QualType desugar() const { return QualType(this, 0); } 2037 2038 static bool classof(const Type *T) { 2039 return T->getTypeClass() == ExtVector; 2040 } 2041 static bool classof(const ExtVectorType *) { return true; } 2042}; 2043 2044/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2045/// class of FunctionNoProtoType and FunctionProtoType. 2046/// 2047class FunctionType : public Type { 2048 virtual void ANCHOR(); // Key function for FunctionType. 2049 2050 // The type returned by the function. 2051 QualType ResultType; 2052 2053 public: 2054 // This class is used for passing arround the information needed to 2055 // construct a call. It is not actually used for storage, just for 2056 // factoring together common arguments. 2057 // If you add a field (say Foo), other than the obvious places (both, constructors, 2058 // compile failures), what you need to update is 2059 // * Operetor== 2060 // * getFoo 2061 // * withFoo 2062 // * functionType. Add Foo, getFoo. 2063 // * ASTContext::getFooType 2064 // * ASTContext::mergeFunctionTypes 2065 // * FunctionNoProtoType::Profile 2066 // * FunctionProtoType::Profile 2067 // * TypePrinter::PrintFunctionProto 2068 // * AST read and write 2069 // * Codegen 2070 2071 class ExtInfo { 2072 enum { CallConvMask = 0x7 }; 2073 enum { NoReturnMask = 0x8 }; 2074 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2075 RegParmOffset = 4 }; 2076 2077 unsigned Bits; 2078 2079 ExtInfo(unsigned Bits) : Bits(Bits) {} 2080 2081 friend class FunctionType; 2082 2083 public: 2084 // Constructor with no defaults. Use this when you know that you 2085 // have all the elements (when reading an AST file for example). 2086 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2087 Bits = ((unsigned) cc) | 2088 (noReturn ? NoReturnMask : 0) | 2089 (regParm << RegParmOffset); 2090 } 2091 2092 // Constructor with all defaults. Use when for example creating a 2093 // function know to use defaults. 2094 ExtInfo() : Bits(0) {} 2095 2096 bool getNoReturn() const { return Bits & NoReturnMask; } 2097 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2098 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2099 2100 bool operator==(ExtInfo Other) const { 2101 return Bits == Other.Bits; 2102 } 2103 bool operator!=(ExtInfo Other) const { 2104 return Bits != Other.Bits; 2105 } 2106 2107 // Note that we don't have setters. That is by design, use 2108 // the following with methods instead of mutating these objects. 2109 2110 ExtInfo withNoReturn(bool noReturn) const { 2111 if (noReturn) 2112 return ExtInfo(Bits | NoReturnMask); 2113 else 2114 return ExtInfo(Bits & ~NoReturnMask); 2115 } 2116 2117 ExtInfo withRegParm(unsigned RegParm) const { 2118 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2119 } 2120 2121 ExtInfo withCallingConv(CallingConv cc) const { 2122 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2123 } 2124 2125 void Profile(llvm::FoldingSetNodeID &ID) { 2126 ID.AddInteger(Bits); 2127 } 2128 }; 2129 2130protected: 2131 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 2132 unsigned typeQuals, QualType Canonical, bool Dependent, 2133 bool VariablyModified, ExtInfo Info) 2134 : Type(tc, Canonical, Dependent, VariablyModified), ResultType(res) { 2135 FunctionTypeBits.ExtInfo = Info.Bits; 2136 FunctionTypeBits.SubclassInfo = SubclassInfo; 2137 FunctionTypeBits.TypeQuals = typeQuals; 2138 } 2139 bool getSubClassData() const { return FunctionTypeBits.SubclassInfo; } 2140 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2141public: 2142 2143 QualType getResultType() const { return ResultType; } 2144 2145 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2146 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2147 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2148 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2149 2150 /// \brief Determine the type of an expression that calls a function of 2151 /// this type. 2152 QualType getCallResultType(ASTContext &Context) const { 2153 return getResultType().getNonLValueExprType(Context); 2154 } 2155 2156 static llvm::StringRef getNameForCallConv(CallingConv CC); 2157 2158 static bool classof(const Type *T) { 2159 return T->getTypeClass() == FunctionNoProto || 2160 T->getTypeClass() == FunctionProto; 2161 } 2162 static bool classof(const FunctionType *) { return true; } 2163}; 2164 2165/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2166/// no information available about its arguments. 2167class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2168 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2169 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2170 /*Dependent=*/false, Result->isVariablyModifiedType(), 2171 Info) {} 2172 friend class ASTContext; // ASTContext creates these. 2173 2174protected: 2175 virtual CachedProperties getCachedProperties() const; 2176 2177public: 2178 // No additional state past what FunctionType provides. 2179 2180 bool isSugared() const { return false; } 2181 QualType desugar() const { return QualType(this, 0); } 2182 2183 void Profile(llvm::FoldingSetNodeID &ID) { 2184 Profile(ID, getResultType(), getExtInfo()); 2185 } 2186 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2187 ExtInfo Info) { 2188 Info.Profile(ID); 2189 ID.AddPointer(ResultType.getAsOpaquePtr()); 2190 } 2191 2192 static bool classof(const Type *T) { 2193 return T->getTypeClass() == FunctionNoProto; 2194 } 2195 static bool classof(const FunctionNoProtoType *) { return true; } 2196}; 2197 2198/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2199/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2200/// arguments, not as having a single void argument. Such a type can have an 2201/// exception specification, but this specification is not part of the canonical 2202/// type. 2203class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2204 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2205 bool isVariadic, unsigned typeQuals, bool hasExs, 2206 bool hasAnyExs, const QualType *ExArray, 2207 unsigned numExs, QualType Canonical, 2208 const ExtInfo &Info); 2209 2210 /// NumArgs - The number of arguments this function has, not counting '...'. 2211 unsigned NumArgs : 20; 2212 2213 /// NumExceptions - The number of types in the exception spec, if any. 2214 unsigned NumExceptions : 10; 2215 2216 /// HasExceptionSpec - Whether this function has an exception spec at all. 2217 bool HasExceptionSpec : 1; 2218 2219 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2220 bool AnyExceptionSpec : 1; 2221 2222 /// ArgInfo - There is an variable size array after the class in memory that 2223 /// holds the argument types. 2224 2225 /// Exceptions - There is another variable size array after ArgInfo that 2226 /// holds the exception types. 2227 2228 friend class ASTContext; // ASTContext creates these. 2229 2230protected: 2231 virtual CachedProperties getCachedProperties() const; 2232 2233public: 2234 unsigned getNumArgs() const { return NumArgs; } 2235 QualType getArgType(unsigned i) const { 2236 assert(i < NumArgs && "Invalid argument number!"); 2237 return arg_type_begin()[i]; 2238 } 2239 2240 bool hasExceptionSpec() const { return HasExceptionSpec; } 2241 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2242 unsigned getNumExceptions() const { return NumExceptions; } 2243 QualType getExceptionType(unsigned i) const { 2244 assert(i < NumExceptions && "Invalid exception number!"); 2245 return exception_begin()[i]; 2246 } 2247 bool hasEmptyExceptionSpec() const { 2248 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2249 getNumExceptions() == 0; 2250 } 2251 2252 bool isVariadic() const { return getSubClassData(); } 2253 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2254 2255 typedef const QualType *arg_type_iterator; 2256 arg_type_iterator arg_type_begin() const { 2257 return reinterpret_cast<const QualType *>(this+1); 2258 } 2259 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2260 2261 typedef const QualType *exception_iterator; 2262 exception_iterator exception_begin() const { 2263 // exceptions begin where arguments end 2264 return arg_type_end(); 2265 } 2266 exception_iterator exception_end() const { 2267 return exception_begin() + NumExceptions; 2268 } 2269 2270 bool isSugared() const { return false; } 2271 QualType desugar() const { return QualType(this, 0); } 2272 2273 static bool classof(const Type *T) { 2274 return T->getTypeClass() == FunctionProto; 2275 } 2276 static bool classof(const FunctionProtoType *) { return true; } 2277 2278 void Profile(llvm::FoldingSetNodeID &ID); 2279 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2280 arg_type_iterator ArgTys, unsigned NumArgs, 2281 bool isVariadic, unsigned TypeQuals, 2282 bool hasExceptionSpec, bool anyExceptionSpec, 2283 unsigned NumExceptions, exception_iterator Exs, 2284 ExtInfo ExtInfo); 2285}; 2286 2287 2288/// \brief Represents the dependent type named by a dependently-scoped 2289/// typename using declaration, e.g. 2290/// using typename Base<T>::foo; 2291/// Template instantiation turns these into the underlying type. 2292class UnresolvedUsingType : public Type { 2293 UnresolvedUsingTypenameDecl *Decl; 2294 2295 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2296 : Type(UnresolvedUsing, QualType(), true, false), 2297 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2298 friend class ASTContext; // ASTContext creates these. 2299public: 2300 2301 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2302 2303 bool isSugared() const { return false; } 2304 QualType desugar() const { return QualType(this, 0); } 2305 2306 static bool classof(const Type *T) { 2307 return T->getTypeClass() == UnresolvedUsing; 2308 } 2309 static bool classof(const UnresolvedUsingType *) { return true; } 2310 2311 void Profile(llvm::FoldingSetNodeID &ID) { 2312 return Profile(ID, Decl); 2313 } 2314 static void Profile(llvm::FoldingSetNodeID &ID, 2315 UnresolvedUsingTypenameDecl *D) { 2316 ID.AddPointer(D); 2317 } 2318}; 2319 2320 2321class TypedefType : public Type { 2322 TypedefDecl *Decl; 2323protected: 2324 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2325 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType()), 2326 Decl(const_cast<TypedefDecl*>(D)) { 2327 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2328 } 2329 friend class ASTContext; // ASTContext creates these. 2330public: 2331 2332 TypedefDecl *getDecl() const { return Decl; } 2333 2334 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2335 /// potentially looking through *all* consecutive typedefs. This returns the 2336 /// sum of the type qualifiers, so if you have: 2337 /// typedef const int A; 2338 /// typedef volatile A B; 2339 /// looking through the typedefs for B will give you "const volatile A". 2340 QualType LookThroughTypedefs() const; 2341 2342 bool isSugared() const { return true; } 2343 QualType desugar() const; 2344 2345 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2346 static bool classof(const TypedefType *) { return true; } 2347}; 2348 2349/// TypeOfExprType (GCC extension). 2350class TypeOfExprType : public Type { 2351 Expr *TOExpr; 2352 2353protected: 2354 TypeOfExprType(Expr *E, QualType can = QualType()); 2355 friend class ASTContext; // ASTContext creates these. 2356public: 2357 Expr *getUnderlyingExpr() const { return TOExpr; } 2358 2359 /// \brief Remove a single level of sugar. 2360 QualType desugar() const; 2361 2362 /// \brief Returns whether this type directly provides sugar. 2363 bool isSugared() const { return true; } 2364 2365 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2366 static bool classof(const TypeOfExprType *) { return true; } 2367}; 2368 2369/// \brief Internal representation of canonical, dependent 2370/// typeof(expr) types. 2371/// 2372/// This class is used internally by the ASTContext to manage 2373/// canonical, dependent types, only. Clients will only see instances 2374/// of this class via TypeOfExprType nodes. 2375class DependentTypeOfExprType 2376 : public TypeOfExprType, public llvm::FoldingSetNode { 2377 ASTContext &Context; 2378 2379public: 2380 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2381 : TypeOfExprType(E), Context(Context) { } 2382 2383 bool isSugared() const { return false; } 2384 QualType desugar() const { return QualType(this, 0); } 2385 2386 void Profile(llvm::FoldingSetNodeID &ID) { 2387 Profile(ID, Context, getUnderlyingExpr()); 2388 } 2389 2390 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2391 Expr *E); 2392}; 2393 2394/// TypeOfType (GCC extension). 2395class TypeOfType : public Type { 2396 QualType TOType; 2397 TypeOfType(QualType T, QualType can) 2398 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType()), 2399 TOType(T) { 2400 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2401 } 2402 friend class ASTContext; // ASTContext creates these. 2403public: 2404 QualType getUnderlyingType() const { return TOType; } 2405 2406 /// \brief Remove a single level of sugar. 2407 QualType desugar() const { return getUnderlyingType(); } 2408 2409 /// \brief Returns whether this type directly provides sugar. 2410 bool isSugared() const { return true; } 2411 2412 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2413 static bool classof(const TypeOfType *) { return true; } 2414}; 2415 2416/// DecltypeType (C++0x) 2417class DecltypeType : public Type { 2418 Expr *E; 2419 2420 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2421 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2422 // from it. 2423 QualType UnderlyingType; 2424 2425protected: 2426 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2427 friend class ASTContext; // ASTContext creates these. 2428public: 2429 Expr *getUnderlyingExpr() const { return E; } 2430 QualType getUnderlyingType() const { return UnderlyingType; } 2431 2432 /// \brief Remove a single level of sugar. 2433 QualType desugar() const { return getUnderlyingType(); } 2434 2435 /// \brief Returns whether this type directly provides sugar. 2436 bool isSugared() const { return !isDependentType(); } 2437 2438 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2439 static bool classof(const DecltypeType *) { return true; } 2440}; 2441 2442/// \brief Internal representation of canonical, dependent 2443/// decltype(expr) types. 2444/// 2445/// This class is used internally by the ASTContext to manage 2446/// canonical, dependent types, only. Clients will only see instances 2447/// of this class via DecltypeType nodes. 2448class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2449 ASTContext &Context; 2450 2451public: 2452 DependentDecltypeType(ASTContext &Context, Expr *E); 2453 2454 bool isSugared() const { return false; } 2455 QualType desugar() const { return QualType(this, 0); } 2456 2457 void Profile(llvm::FoldingSetNodeID &ID) { 2458 Profile(ID, Context, getUnderlyingExpr()); 2459 } 2460 2461 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2462 Expr *E); 2463}; 2464 2465class TagType : public Type { 2466 /// Stores the TagDecl associated with this type. The decl may point to any 2467 /// TagDecl that declares the entity. 2468 TagDecl * decl; 2469 2470protected: 2471 TagType(TypeClass TC, const TagDecl *D, QualType can); 2472 2473 virtual CachedProperties getCachedProperties() const; 2474 2475public: 2476 TagDecl *getDecl() const; 2477 2478 /// @brief Determines whether this type is in the process of being 2479 /// defined. 2480 bool isBeingDefined() const; 2481 2482 static bool classof(const Type *T) { 2483 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2484 } 2485 static bool classof(const TagType *) { return true; } 2486 static bool classof(const RecordType *) { return true; } 2487 static bool classof(const EnumType *) { return true; } 2488}; 2489 2490/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2491/// to detect TagType objects of structs/unions/classes. 2492class RecordType : public TagType { 2493protected: 2494 explicit RecordType(const RecordDecl *D) 2495 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2496 explicit RecordType(TypeClass TC, RecordDecl *D) 2497 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2498 friend class ASTContext; // ASTContext creates these. 2499public: 2500 2501 RecordDecl *getDecl() const { 2502 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2503 } 2504 2505 // FIXME: This predicate is a helper to QualType/Type. It needs to 2506 // recursively check all fields for const-ness. If any field is declared 2507 // const, it needs to return false. 2508 bool hasConstFields() const { return false; } 2509 2510 // FIXME: RecordType needs to check when it is created that all fields are in 2511 // the same address space, and return that. 2512 unsigned getAddressSpace() const { return 0; } 2513 2514 bool isSugared() const { return false; } 2515 QualType desugar() const { return QualType(this, 0); } 2516 2517 static bool classof(const TagType *T); 2518 static bool classof(const Type *T) { 2519 return isa<TagType>(T) && classof(cast<TagType>(T)); 2520 } 2521 static bool classof(const RecordType *) { return true; } 2522}; 2523 2524/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2525/// to detect TagType objects of enums. 2526class EnumType : public TagType { 2527 explicit EnumType(const EnumDecl *D) 2528 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2529 friend class ASTContext; // ASTContext creates these. 2530public: 2531 2532 EnumDecl *getDecl() const { 2533 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2534 } 2535 2536 bool isSugared() const { return false; } 2537 QualType desugar() const { return QualType(this, 0); } 2538 2539 static bool classof(const TagType *T); 2540 static bool classof(const Type *T) { 2541 return isa<TagType>(T) && classof(cast<TagType>(T)); 2542 } 2543 static bool classof(const EnumType *) { return true; } 2544}; 2545 2546class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2547 unsigned Depth : 15; 2548 unsigned ParameterPack : 1; 2549 unsigned Index : 16; 2550 IdentifierInfo *Name; 2551 2552 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2553 QualType Canon) 2554 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2555 /*VariablyModified=*/false), 2556 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2557 2558 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2559 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2560 /*VariablyModified=*/false), 2561 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2562 2563 friend class ASTContext; // ASTContext creates these 2564 2565public: 2566 unsigned getDepth() const { return Depth; } 2567 unsigned getIndex() const { return Index; } 2568 bool isParameterPack() const { return ParameterPack; } 2569 IdentifierInfo *getName() const { return Name; } 2570 2571 bool isSugared() const { return false; } 2572 QualType desugar() const { return QualType(this, 0); } 2573 2574 void Profile(llvm::FoldingSetNodeID &ID) { 2575 Profile(ID, Depth, Index, ParameterPack, Name); 2576 } 2577 2578 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2579 unsigned Index, bool ParameterPack, 2580 IdentifierInfo *Name) { 2581 ID.AddInteger(Depth); 2582 ID.AddInteger(Index); 2583 ID.AddBoolean(ParameterPack); 2584 ID.AddPointer(Name); 2585 } 2586 2587 static bool classof(const Type *T) { 2588 return T->getTypeClass() == TemplateTypeParm; 2589 } 2590 static bool classof(const TemplateTypeParmType *T) { return true; } 2591}; 2592 2593/// \brief Represents the result of substituting a type for a template 2594/// type parameter. 2595/// 2596/// Within an instantiated template, all template type parameters have 2597/// been replaced with these. They are used solely to record that a 2598/// type was originally written as a template type parameter; 2599/// therefore they are never canonical. 2600class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2601 // The original type parameter. 2602 const TemplateTypeParmType *Replaced; 2603 2604 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2605 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2606 Canon->isVariablyModifiedType()), 2607 Replaced(Param) { } 2608 2609 friend class ASTContext; 2610 2611public: 2612 IdentifierInfo *getName() const { return Replaced->getName(); } 2613 2614 /// Gets the template parameter that was substituted for. 2615 const TemplateTypeParmType *getReplacedParameter() const { 2616 return Replaced; 2617 } 2618 2619 /// Gets the type that was substituted for the template 2620 /// parameter. 2621 QualType getReplacementType() const { 2622 return getCanonicalTypeInternal(); 2623 } 2624 2625 bool isSugared() const { return true; } 2626 QualType desugar() const { return getReplacementType(); } 2627 2628 void Profile(llvm::FoldingSetNodeID &ID) { 2629 Profile(ID, getReplacedParameter(), getReplacementType()); 2630 } 2631 static void Profile(llvm::FoldingSetNodeID &ID, 2632 const TemplateTypeParmType *Replaced, 2633 QualType Replacement) { 2634 ID.AddPointer(Replaced); 2635 ID.AddPointer(Replacement.getAsOpaquePtr()); 2636 } 2637 2638 static bool classof(const Type *T) { 2639 return T->getTypeClass() == SubstTemplateTypeParm; 2640 } 2641 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2642}; 2643 2644/// \brief Represents the type of a template specialization as written 2645/// in the source code. 2646/// 2647/// Template specialization types represent the syntactic form of a 2648/// template-id that refers to a type, e.g., @c vector<int>. Some 2649/// template specialization types are syntactic sugar, whose canonical 2650/// type will point to some other type node that represents the 2651/// instantiation or class template specialization. For example, a 2652/// class template specialization type of @c vector<int> will refer to 2653/// a tag type for the instantiation 2654/// @c std::vector<int, std::allocator<int>>. 2655/// 2656/// Other template specialization types, for which the template name 2657/// is dependent, may be canonical types. These types are always 2658/// dependent. 2659class TemplateSpecializationType 2660 : public Type, public llvm::FoldingSetNode { 2661 /// \brief The name of the template being specialized. 2662 TemplateName Template; 2663 2664 /// \brief - The number of template arguments named in this class 2665 /// template specialization. 2666 unsigned NumArgs; 2667 2668 TemplateSpecializationType(TemplateName T, 2669 const TemplateArgument *Args, 2670 unsigned NumArgs, QualType Canon); 2671 2672 friend class ASTContext; // ASTContext creates these 2673 2674public: 2675 /// \brief Determine whether any of the given template arguments are 2676 /// dependent. 2677 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2678 unsigned NumArgs); 2679 2680 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2681 unsigned NumArgs); 2682 2683 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2684 2685 /// \brief Print a template argument list, including the '<' and '>' 2686 /// enclosing the template arguments. 2687 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2688 unsigned NumArgs, 2689 const PrintingPolicy &Policy); 2690 2691 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2692 unsigned NumArgs, 2693 const PrintingPolicy &Policy); 2694 2695 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2696 const PrintingPolicy &Policy); 2697 2698 /// True if this template specialization type matches a current 2699 /// instantiation in the context in which it is found. 2700 bool isCurrentInstantiation() const { 2701 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2702 } 2703 2704 typedef const TemplateArgument * iterator; 2705 2706 iterator begin() const { return getArgs(); } 2707 iterator end() const; // defined inline in TemplateBase.h 2708 2709 /// \brief Retrieve the name of the template that we are specializing. 2710 TemplateName getTemplateName() const { return Template; } 2711 2712 /// \brief Retrieve the template arguments. 2713 const TemplateArgument *getArgs() const { 2714 return reinterpret_cast<const TemplateArgument *>(this + 1); 2715 } 2716 2717 /// \brief Retrieve the number of template arguments. 2718 unsigned getNumArgs() const { return NumArgs; } 2719 2720 /// \brief Retrieve a specific template argument as a type. 2721 /// \precondition @c isArgType(Arg) 2722 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2723 2724 bool isSugared() const { 2725 return !isDependentType() || isCurrentInstantiation(); 2726 } 2727 QualType desugar() const { return getCanonicalTypeInternal(); } 2728 2729 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2730 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2731 } 2732 2733 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2734 const TemplateArgument *Args, 2735 unsigned NumArgs, 2736 ASTContext &Context); 2737 2738 static bool classof(const Type *T) { 2739 return T->getTypeClass() == TemplateSpecialization; 2740 } 2741 static bool classof(const TemplateSpecializationType *T) { return true; } 2742}; 2743 2744/// \brief The injected class name of a C++ class template or class 2745/// template partial specialization. Used to record that a type was 2746/// spelled with a bare identifier rather than as a template-id; the 2747/// equivalent for non-templated classes is just RecordType. 2748/// 2749/// Injected class name types are always dependent. Template 2750/// instantiation turns these into RecordTypes. 2751/// 2752/// Injected class name types are always canonical. This works 2753/// because it is impossible to compare an injected class name type 2754/// with the corresponding non-injected template type, for the same 2755/// reason that it is impossible to directly compare template 2756/// parameters from different dependent contexts: injected class name 2757/// types can only occur within the scope of a particular templated 2758/// declaration, and within that scope every template specialization 2759/// will canonicalize to the injected class name (when appropriate 2760/// according to the rules of the language). 2761class InjectedClassNameType : public Type { 2762 CXXRecordDecl *Decl; 2763 2764 /// The template specialization which this type represents. 2765 /// For example, in 2766 /// template <class T> class A { ... }; 2767 /// this is A<T>, whereas in 2768 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2769 /// this is A<B<X,Y> >. 2770 /// 2771 /// It is always unqualified, always a template specialization type, 2772 /// and always dependent. 2773 QualType InjectedType; 2774 2775 friend class ASTContext; // ASTContext creates these. 2776 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2777 // currently suitable for AST reading, too much 2778 // interdependencies. 2779 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2780 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2781 /*VariablyModified=*/false), 2782 Decl(D), InjectedType(TST) { 2783 assert(isa<TemplateSpecializationType>(TST)); 2784 assert(!TST.hasQualifiers()); 2785 assert(TST->isDependentType()); 2786 } 2787 2788public: 2789 QualType getInjectedSpecializationType() const { return InjectedType; } 2790 const TemplateSpecializationType *getInjectedTST() const { 2791 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2792 } 2793 2794 CXXRecordDecl *getDecl() const; 2795 2796 bool isSugared() const { return false; } 2797 QualType desugar() const { return QualType(this, 0); } 2798 2799 static bool classof(const Type *T) { 2800 return T->getTypeClass() == InjectedClassName; 2801 } 2802 static bool classof(const InjectedClassNameType *T) { return true; } 2803}; 2804 2805/// \brief The kind of a tag type. 2806enum TagTypeKind { 2807 /// \brief The "struct" keyword. 2808 TTK_Struct, 2809 /// \brief The "union" keyword. 2810 TTK_Union, 2811 /// \brief The "class" keyword. 2812 TTK_Class, 2813 /// \brief The "enum" keyword. 2814 TTK_Enum 2815}; 2816 2817/// \brief The elaboration keyword that precedes a qualified type name or 2818/// introduces an elaborated-type-specifier. 2819enum ElaboratedTypeKeyword { 2820 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2821 ETK_Struct, 2822 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2823 ETK_Union, 2824 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2825 ETK_Class, 2826 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2827 ETK_Enum, 2828 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2829 /// \c typename T::type. 2830 ETK_Typename, 2831 /// \brief No keyword precedes the qualified type name. 2832 ETK_None 2833}; 2834 2835/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2836/// The keyword in stored in the free bits of the base class. 2837/// Also provides a few static helpers for converting and printing 2838/// elaborated type keyword and tag type kind enumerations. 2839class TypeWithKeyword : public Type { 2840protected: 2841 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2842 QualType Canonical, bool Dependent, bool VariablyModified) 2843 : Type(tc, Canonical, Dependent, VariablyModified) { 2844 TypeWithKeywordBits.Keyword = Keyword; 2845 } 2846 2847public: 2848 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2849 2850 ElaboratedTypeKeyword getKeyword() const { 2851 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 2852 } 2853 2854 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2855 /// into an elaborated type keyword. 2856 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2857 2858 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2859 /// into a tag type kind. It is an error to provide a type specifier 2860 /// which *isn't* a tag kind here. 2861 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2862 2863 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2864 /// elaborated type keyword. 2865 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2866 2867 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2868 // a TagTypeKind. It is an error to provide an elaborated type keyword 2869 /// which *isn't* a tag kind here. 2870 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2871 2872 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2873 2874 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2875 2876 static const char *getTagTypeKindName(TagTypeKind Kind) { 2877 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2878 } 2879 2880 class CannotCastToThisType {}; 2881 static CannotCastToThisType classof(const Type *); 2882}; 2883 2884/// \brief Represents a type that was referred to using an elaborated type 2885/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2886/// or both. 2887/// 2888/// This type is used to keep track of a type name as written in the 2889/// source code, including tag keywords and any nested-name-specifiers. 2890/// The type itself is always "sugar", used to express what was written 2891/// in the source code but containing no additional semantic information. 2892class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2893 2894 /// \brief The nested name specifier containing the qualifier. 2895 NestedNameSpecifier *NNS; 2896 2897 /// \brief The type that this qualified name refers to. 2898 QualType NamedType; 2899 2900 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2901 QualType NamedType, QualType CanonType) 2902 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2903 NamedType->isDependentType(), 2904 NamedType->isVariablyModifiedType()), 2905 NNS(NNS), NamedType(NamedType) { 2906 assert(!(Keyword == ETK_None && NNS == 0) && 2907 "ElaboratedType cannot have elaborated type keyword " 2908 "and name qualifier both null."); 2909 } 2910 2911 friend class ASTContext; // ASTContext creates these 2912 2913public: 2914 ~ElaboratedType(); 2915 2916 /// \brief Retrieve the qualification on this type. 2917 NestedNameSpecifier *getQualifier() const { return NNS; } 2918 2919 /// \brief Retrieve the type named by the qualified-id. 2920 QualType getNamedType() const { return NamedType; } 2921 2922 /// \brief Remove a single level of sugar. 2923 QualType desugar() const { return getNamedType(); } 2924 2925 /// \brief Returns whether this type directly provides sugar. 2926 bool isSugared() const { return true; } 2927 2928 void Profile(llvm::FoldingSetNodeID &ID) { 2929 Profile(ID, getKeyword(), NNS, NamedType); 2930 } 2931 2932 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2933 NestedNameSpecifier *NNS, QualType NamedType) { 2934 ID.AddInteger(Keyword); 2935 ID.AddPointer(NNS); 2936 NamedType.Profile(ID); 2937 } 2938 2939 static bool classof(const Type *T) { 2940 return T->getTypeClass() == Elaborated; 2941 } 2942 static bool classof(const ElaboratedType *T) { return true; } 2943}; 2944 2945/// \brief Represents a qualified type name for which the type name is 2946/// dependent. 2947/// 2948/// DependentNameType represents a class of dependent types that involve a 2949/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2950/// name of a type. The DependentNameType may start with a "typename" (for a 2951/// typename-specifier), "class", "struct", "union", or "enum" (for a 2952/// dependent elaborated-type-specifier), or nothing (in contexts where we 2953/// know that we must be referring to a type, e.g., in a base class specifier). 2954class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2955 2956 /// \brief The nested name specifier containing the qualifier. 2957 NestedNameSpecifier *NNS; 2958 2959 /// \brief The type that this typename specifier refers to. 2960 const IdentifierInfo *Name; 2961 2962 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2963 const IdentifierInfo *Name, QualType CanonType) 2964 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 2965 /*VariablyModified=*/false), 2966 NNS(NNS), Name(Name) { 2967 assert(NNS->isDependent() && 2968 "DependentNameType requires a dependent nested-name-specifier"); 2969 } 2970 2971 friend class ASTContext; // ASTContext creates these 2972 2973public: 2974 virtual ~DependentNameType(); 2975 2976 /// \brief Retrieve the qualification on this type. 2977 NestedNameSpecifier *getQualifier() const { return NNS; } 2978 2979 /// \brief Retrieve the type named by the typename specifier as an 2980 /// identifier. 2981 /// 2982 /// This routine will return a non-NULL identifier pointer when the 2983 /// form of the original typename was terminated by an identifier, 2984 /// e.g., "typename T::type". 2985 const IdentifierInfo *getIdentifier() const { 2986 return Name; 2987 } 2988 2989 bool isSugared() const { return false; } 2990 QualType desugar() const { return QualType(this, 0); } 2991 2992 void Profile(llvm::FoldingSetNodeID &ID) { 2993 Profile(ID, getKeyword(), NNS, Name); 2994 } 2995 2996 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2997 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2998 ID.AddInteger(Keyword); 2999 ID.AddPointer(NNS); 3000 ID.AddPointer(Name); 3001 } 3002 3003 static bool classof(const Type *T) { 3004 return T->getTypeClass() == DependentName; 3005 } 3006 static bool classof(const DependentNameType *T) { return true; } 3007}; 3008 3009/// DependentTemplateSpecializationType - Represents a template 3010/// specialization type whose template cannot be resolved, e.g. 3011/// A<T>::template B<T> 3012class DependentTemplateSpecializationType : 3013 public TypeWithKeyword, public llvm::FoldingSetNode { 3014 3015 /// \brief The nested name specifier containing the qualifier. 3016 NestedNameSpecifier *NNS; 3017 3018 /// \brief The identifier of the template. 3019 const IdentifierInfo *Name; 3020 3021 /// \brief - The number of template arguments named in this class 3022 /// template specialization. 3023 unsigned NumArgs; 3024 3025 const TemplateArgument *getArgBuffer() const { 3026 return reinterpret_cast<const TemplateArgument*>(this+1); 3027 } 3028 TemplateArgument *getArgBuffer() { 3029 return reinterpret_cast<TemplateArgument*>(this+1); 3030 } 3031 3032 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3033 NestedNameSpecifier *NNS, 3034 const IdentifierInfo *Name, 3035 unsigned NumArgs, 3036 const TemplateArgument *Args, 3037 QualType Canon); 3038 3039 friend class ASTContext; // ASTContext creates these 3040 3041public: 3042 virtual ~DependentTemplateSpecializationType(); 3043 3044 NestedNameSpecifier *getQualifier() const { return NNS; } 3045 const IdentifierInfo *getIdentifier() const { return Name; } 3046 3047 /// \brief Retrieve the template arguments. 3048 const TemplateArgument *getArgs() const { 3049 return getArgBuffer(); 3050 } 3051 3052 /// \brief Retrieve the number of template arguments. 3053 unsigned getNumArgs() const { return NumArgs; } 3054 3055 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3056 3057 typedef const TemplateArgument * iterator; 3058 iterator begin() const { return getArgs(); } 3059 iterator end() const; // inline in TemplateBase.h 3060 3061 bool isSugared() const { return false; } 3062 QualType desugar() const { return QualType(this, 0); } 3063 3064 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 3065 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3066 } 3067 3068 static void Profile(llvm::FoldingSetNodeID &ID, 3069 ASTContext &Context, 3070 ElaboratedTypeKeyword Keyword, 3071 NestedNameSpecifier *Qualifier, 3072 const IdentifierInfo *Name, 3073 unsigned NumArgs, 3074 const TemplateArgument *Args); 3075 3076 static bool classof(const Type *T) { 3077 return T->getTypeClass() == DependentTemplateSpecialization; 3078 } 3079 static bool classof(const DependentTemplateSpecializationType *T) { 3080 return true; 3081 } 3082}; 3083 3084/// ObjCObjectType - Represents a class type in Objective C. 3085/// Every Objective C type is a combination of a base type and a 3086/// list of protocols. 3087/// 3088/// Given the following declarations: 3089/// @class C; 3090/// @protocol P; 3091/// 3092/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3093/// with base C and no protocols. 3094/// 3095/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3096/// 3097/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3098/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3099/// and no protocols. 3100/// 3101/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3102/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3103/// this should get its own sugar class to better represent the source. 3104class ObjCObjectType : public Type { 3105 // ObjCObjectType.NumProtocols - the number of protocols stored 3106 // after the ObjCObjectPointerType node. 3107 // 3108 // These protocols are those written directly on the type. If 3109 // protocol qualifiers ever become additive, the iterators will need 3110 // to get kindof complicated. 3111 // 3112 // In the canonical object type, these are sorted alphabetically 3113 // and uniqued. 3114 3115 /// Either a BuiltinType or an InterfaceType or sugar for either. 3116 QualType BaseType; 3117 3118 ObjCProtocolDecl * const *getProtocolStorage() const { 3119 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3120 } 3121 3122 ObjCProtocolDecl **getProtocolStorage(); 3123 3124protected: 3125 ObjCObjectType(QualType Canonical, QualType Base, 3126 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3127 3128 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3129 ObjCObjectType(enum Nonce_ObjCInterface) 3130 : Type(ObjCInterface, QualType(), false, false), 3131 BaseType(QualType(this_(), 0)) { 3132 ObjCObjectTypeBits.NumProtocols = 0; 3133 } 3134 3135protected: 3136 CachedProperties getCachedProperties() const; // key function 3137 3138public: 3139 /// getBaseType - Gets the base type of this object type. This is 3140 /// always (possibly sugar for) one of: 3141 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3142 /// user, which is a typedef for an ObjCPointerType) 3143 /// - the 'Class' builtin type (same caveat) 3144 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3145 QualType getBaseType() const { return BaseType; } 3146 3147 bool isObjCId() const { 3148 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3149 } 3150 bool isObjCClass() const { 3151 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3152 } 3153 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3154 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3155 bool isObjCUnqualifiedIdOrClass() const { 3156 if (!qual_empty()) return false; 3157 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3158 return T->getKind() == BuiltinType::ObjCId || 3159 T->getKind() == BuiltinType::ObjCClass; 3160 return false; 3161 } 3162 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3163 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3164 3165 /// Gets the interface declaration for this object type, if the base type 3166 /// really is an interface. 3167 ObjCInterfaceDecl *getInterface() const; 3168 3169 typedef ObjCProtocolDecl * const *qual_iterator; 3170 3171 qual_iterator qual_begin() const { return getProtocolStorage(); } 3172 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3173 3174 bool qual_empty() const { return getNumProtocols() == 0; } 3175 3176 /// getNumProtocols - Return the number of qualifying protocols in this 3177 /// interface type, or 0 if there are none. 3178 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3179 3180 /// \brief Fetch a protocol by index. 3181 ObjCProtocolDecl *getProtocol(unsigned I) const { 3182 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3183 return qual_begin()[I]; 3184 } 3185 3186 bool isSugared() const { return false; } 3187 QualType desugar() const { return QualType(this, 0); } 3188 3189 static bool classof(const Type *T) { 3190 return T->getTypeClass() == ObjCObject || 3191 T->getTypeClass() == ObjCInterface; 3192 } 3193 static bool classof(const ObjCObjectType *) { return true; } 3194}; 3195 3196/// ObjCObjectTypeImpl - A class providing a concrete implementation 3197/// of ObjCObjectType, so as to not increase the footprint of 3198/// ObjCInterfaceType. Code outside of ASTContext and the core type 3199/// system should not reference this type. 3200class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3201 friend class ASTContext; 3202 3203 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3204 // will need to be modified. 3205 3206 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3207 ObjCProtocolDecl * const *Protocols, 3208 unsigned NumProtocols) 3209 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3210 3211public: 3212 void Profile(llvm::FoldingSetNodeID &ID); 3213 static void Profile(llvm::FoldingSetNodeID &ID, 3214 QualType Base, 3215 ObjCProtocolDecl *const *protocols, 3216 unsigned NumProtocols); 3217}; 3218 3219inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3220 return reinterpret_cast<ObjCProtocolDecl**>( 3221 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3222} 3223 3224/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3225/// object oriented design. They basically correspond to C++ classes. There 3226/// are two kinds of interface types, normal interfaces like "NSString" and 3227/// qualified interfaces, which are qualified with a protocol list like 3228/// "NSString<NSCopyable, NSAmazing>". 3229/// 3230/// ObjCInterfaceType guarantees the following properties when considered 3231/// as a subtype of its superclass, ObjCObjectType: 3232/// - There are no protocol qualifiers. To reinforce this, code which 3233/// tries to invoke the protocol methods via an ObjCInterfaceType will 3234/// fail to compile. 3235/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3236/// T->getBaseType() == QualType(T, 0). 3237class ObjCInterfaceType : public ObjCObjectType { 3238 ObjCInterfaceDecl *Decl; 3239 3240 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3241 : ObjCObjectType(Nonce_ObjCInterface), 3242 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3243 friend class ASTContext; // ASTContext creates these. 3244 3245protected: 3246 virtual CachedProperties getCachedProperties() const; 3247 3248public: 3249 /// getDecl - Get the declaration of this interface. 3250 ObjCInterfaceDecl *getDecl() const { return Decl; } 3251 3252 bool isSugared() const { return false; } 3253 QualType desugar() const { return QualType(this, 0); } 3254 3255 static bool classof(const Type *T) { 3256 return T->getTypeClass() == ObjCInterface; 3257 } 3258 static bool classof(const ObjCInterfaceType *) { return true; } 3259 3260 // Nonsense to "hide" certain members of ObjCObjectType within this 3261 // class. People asking for protocols on an ObjCInterfaceType are 3262 // not going to get what they want: ObjCInterfaceTypes are 3263 // guaranteed to have no protocols. 3264 enum { 3265 qual_iterator, 3266 qual_begin, 3267 qual_end, 3268 getNumProtocols, 3269 getProtocol 3270 }; 3271}; 3272 3273inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3274 if (const ObjCInterfaceType *T = 3275 getBaseType()->getAs<ObjCInterfaceType>()) 3276 return T->getDecl(); 3277 return 0; 3278} 3279 3280/// ObjCObjectPointerType - Used to represent a pointer to an 3281/// Objective C object. These are constructed from pointer 3282/// declarators when the pointee type is an ObjCObjectType (or sugar 3283/// for one). In addition, the 'id' and 'Class' types are typedefs 3284/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3285/// are translated into these. 3286/// 3287/// Pointers to pointers to Objective C objects are still PointerTypes; 3288/// only the first level of pointer gets it own type implementation. 3289class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3290 QualType PointeeType; 3291 3292 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3293 : Type(ObjCObjectPointer, Canonical, false, false), 3294 PointeeType(Pointee) {} 3295 friend class ASTContext; // ASTContext creates these. 3296 3297protected: 3298 virtual CachedProperties getCachedProperties() const; 3299 3300public: 3301 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3302 /// The result will always be an ObjCObjectType or sugar thereof. 3303 QualType getPointeeType() const { return PointeeType; } 3304 3305 /// getObjCObjectType - Gets the type pointed to by this ObjC 3306 /// pointer. This method always returns non-null. 3307 /// 3308 /// This method is equivalent to getPointeeType() except that 3309 /// it discards any typedefs (or other sugar) between this 3310 /// type and the "outermost" object type. So for: 3311 /// @class A; @protocol P; @protocol Q; 3312 /// typedef A<P> AP; 3313 /// typedef A A1; 3314 /// typedef A1<P> A1P; 3315 /// typedef A1P<Q> A1PQ; 3316 /// For 'A*', getObjectType() will return 'A'. 3317 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3318 /// For 'AP*', getObjectType() will return 'A<P>'. 3319 /// For 'A1*', getObjectType() will return 'A'. 3320 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3321 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3322 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3323 /// adding protocols to a protocol-qualified base discards the 3324 /// old qualifiers (for now). But if it didn't, getObjectType() 3325 /// would return 'A1P<Q>' (and we'd have to make iterating over 3326 /// qualifiers more complicated). 3327 const ObjCObjectType *getObjectType() const { 3328 return PointeeType->getAs<ObjCObjectType>(); 3329 } 3330 3331 /// getInterfaceType - If this pointer points to an Objective C 3332 /// @interface type, gets the type for that interface. Any protocol 3333 /// qualifiers on the interface are ignored. 3334 /// 3335 /// \return null if the base type for this pointer is 'id' or 'Class' 3336 const ObjCInterfaceType *getInterfaceType() const { 3337 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3338 } 3339 3340 /// getInterfaceDecl - If this pointer points to an Objective @interface 3341 /// type, gets the declaration for that interface. 3342 /// 3343 /// \return null if the base type for this pointer is 'id' or 'Class' 3344 ObjCInterfaceDecl *getInterfaceDecl() const { 3345 return getObjectType()->getInterface(); 3346 } 3347 3348 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3349 /// its object type is the primitive 'id' type with no protocols. 3350 bool isObjCIdType() const { 3351 return getObjectType()->isObjCUnqualifiedId(); 3352 } 3353 3354 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3355 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3356 bool isObjCClassType() const { 3357 return getObjectType()->isObjCUnqualifiedClass(); 3358 } 3359 3360 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3361 /// non-empty set of protocols. 3362 bool isObjCQualifiedIdType() const { 3363 return getObjectType()->isObjCQualifiedId(); 3364 } 3365 3366 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3367 /// some non-empty set of protocols. 3368 bool isObjCQualifiedClassType() const { 3369 return getObjectType()->isObjCQualifiedClass(); 3370 } 3371 3372 /// An iterator over the qualifiers on the object type. Provided 3373 /// for convenience. This will always iterate over the full set of 3374 /// protocols on a type, not just those provided directly. 3375 typedef ObjCObjectType::qual_iterator qual_iterator; 3376 3377 qual_iterator qual_begin() const { 3378 return getObjectType()->qual_begin(); 3379 } 3380 qual_iterator qual_end() const { 3381 return getObjectType()->qual_end(); 3382 } 3383 bool qual_empty() const { return getObjectType()->qual_empty(); } 3384 3385 /// getNumProtocols - Return the number of qualifying protocols on 3386 /// the object type. 3387 unsigned getNumProtocols() const { 3388 return getObjectType()->getNumProtocols(); 3389 } 3390 3391 /// \brief Retrieve a qualifying protocol by index on the object 3392 /// type. 3393 ObjCProtocolDecl *getProtocol(unsigned I) const { 3394 return getObjectType()->getProtocol(I); 3395 } 3396 3397 bool isSugared() const { return false; } 3398 QualType desugar() const { return QualType(this, 0); } 3399 3400 void Profile(llvm::FoldingSetNodeID &ID) { 3401 Profile(ID, getPointeeType()); 3402 } 3403 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3404 ID.AddPointer(T.getAsOpaquePtr()); 3405 } 3406 static bool classof(const Type *T) { 3407 return T->getTypeClass() == ObjCObjectPointer; 3408 } 3409 static bool classof(const ObjCObjectPointerType *) { return true; } 3410}; 3411 3412/// A qualifier set is used to build a set of qualifiers. 3413class QualifierCollector : public Qualifiers { 3414 ASTContext *Context; 3415 3416public: 3417 QualifierCollector(Qualifiers Qs = Qualifiers()) 3418 : Qualifiers(Qs), Context(0) {} 3419 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3420 : Qualifiers(Qs), Context(&Context) {} 3421 3422 void setContext(ASTContext &C) { Context = &C; } 3423 3424 /// Collect any qualifiers on the given type and return an 3425 /// unqualified type. 3426 const Type *strip(QualType QT) { 3427 addFastQualifiers(QT.getLocalFastQualifiers()); 3428 if (QT.hasLocalNonFastQualifiers()) { 3429 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3430 Context = &EQ->getContext(); 3431 addQualifiers(EQ->getQualifiers()); 3432 return EQ->getBaseType(); 3433 } 3434 return QT.getTypePtrUnsafe(); 3435 } 3436 3437 /// Apply the collected qualifiers to the given type. 3438 QualType apply(QualType QT) const; 3439 3440 /// Apply the collected qualifiers to the given type. 3441 QualType apply(const Type* T) const; 3442 3443}; 3444 3445 3446// Inline function definitions. 3447 3448inline bool QualType::isCanonical() const { 3449 const Type *T = getTypePtr(); 3450 if (hasLocalQualifiers()) 3451 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3452 return T->isCanonicalUnqualified(); 3453} 3454 3455inline bool QualType::isCanonicalAsParam() const { 3456 if (hasLocalQualifiers()) return false; 3457 3458 const Type *T = getTypePtr(); 3459 if ((*this)->isPointerType()) { 3460 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3461 if (isa<VariableArrayType>(BaseType)) { 3462 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3463 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3464 if (VAT->getSizeExpr()) 3465 T = BaseType.getTypePtr(); 3466 } 3467 } 3468 return T->isCanonicalUnqualified() && 3469 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3470} 3471 3472inline bool QualType::isConstQualified() const { 3473 return isLocalConstQualified() || 3474 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3475} 3476 3477inline bool QualType::isRestrictQualified() const { 3478 return isLocalRestrictQualified() || 3479 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3480} 3481 3482 3483inline bool QualType::isVolatileQualified() const { 3484 return isLocalVolatileQualified() || 3485 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3486} 3487 3488inline bool QualType::hasQualifiers() const { 3489 return hasLocalQualifiers() || 3490 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3491} 3492 3493inline Qualifiers QualType::getQualifiers() const { 3494 Qualifiers Quals = getLocalQualifiers(); 3495 Quals.addQualifiers( 3496 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3497 return Quals; 3498} 3499 3500inline unsigned QualType::getCVRQualifiers() const { 3501 return getLocalCVRQualifiers() | 3502 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3503} 3504 3505/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3506/// type, returns them. Otherwise, if this is an array type, recurses 3507/// on the element type until some qualifiers have been found or a non-array 3508/// type reached. 3509inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3510 if (unsigned Quals = getCVRQualifiers()) 3511 return Quals; 3512 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3513 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3514 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3515 return 0; 3516} 3517 3518inline void QualType::removeConst() { 3519 removeFastQualifiers(Qualifiers::Const); 3520} 3521 3522inline void QualType::removeRestrict() { 3523 removeFastQualifiers(Qualifiers::Restrict); 3524} 3525 3526inline void QualType::removeVolatile() { 3527 QualifierCollector Qc; 3528 const Type *Ty = Qc.strip(*this); 3529 if (Qc.hasVolatile()) { 3530 Qc.removeVolatile(); 3531 *this = Qc.apply(Ty); 3532 } 3533} 3534 3535inline void QualType::removeCVRQualifiers(unsigned Mask) { 3536 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3537 3538 // Fast path: we don't need to touch the slow qualifiers. 3539 if (!(Mask & ~Qualifiers::FastMask)) { 3540 removeFastQualifiers(Mask); 3541 return; 3542 } 3543 3544 QualifierCollector Qc; 3545 const Type *Ty = Qc.strip(*this); 3546 Qc.removeCVRQualifiers(Mask); 3547 *this = Qc.apply(Ty); 3548} 3549 3550/// getAddressSpace - Return the address space of this type. 3551inline unsigned QualType::getAddressSpace() const { 3552 if (hasLocalNonFastQualifiers()) { 3553 const ExtQuals *EQ = getExtQualsUnsafe(); 3554 if (EQ->hasAddressSpace()) 3555 return EQ->getAddressSpace(); 3556 } 3557 3558 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3559 if (CT.hasLocalNonFastQualifiers()) { 3560 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3561 if (EQ->hasAddressSpace()) 3562 return EQ->getAddressSpace(); 3563 } 3564 3565 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3566 return AT->getElementType().getAddressSpace(); 3567 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3568 return RT->getAddressSpace(); 3569 return 0; 3570} 3571 3572/// getObjCGCAttr - Return the gc attribute of this type. 3573inline Qualifiers::GC QualType::getObjCGCAttr() const { 3574 if (hasLocalNonFastQualifiers()) { 3575 const ExtQuals *EQ = getExtQualsUnsafe(); 3576 if (EQ->hasObjCGCAttr()) 3577 return EQ->getObjCGCAttr(); 3578 } 3579 3580 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3581 if (CT.hasLocalNonFastQualifiers()) { 3582 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3583 if (EQ->hasObjCGCAttr()) 3584 return EQ->getObjCGCAttr(); 3585 } 3586 3587 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3588 return AT->getElementType().getObjCGCAttr(); 3589 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3590 return PT->getPointeeType().getObjCGCAttr(); 3591 // We most look at all pointer types, not just pointer to interface types. 3592 if (const PointerType *PT = CT->getAs<PointerType>()) 3593 return PT->getPointeeType().getObjCGCAttr(); 3594 return Qualifiers::GCNone; 3595} 3596 3597inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3598 if (const PointerType *PT = t.getAs<PointerType>()) { 3599 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3600 return FT->getExtInfo(); 3601 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3602 return FT->getExtInfo(); 3603 3604 return FunctionType::ExtInfo(); 3605} 3606 3607inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3608 return getFunctionExtInfo(*t); 3609} 3610 3611/// \brief Determine whether this set of qualifiers is a superset of the given 3612/// set of qualifiers. 3613inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3614 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3615} 3616 3617/// isMoreQualifiedThan - Determine whether this type is more 3618/// qualified than the Other type. For example, "const volatile int" 3619/// is more qualified than "const int", "volatile int", and 3620/// "int". However, it is not more qualified than "const volatile 3621/// int". 3622inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3623 // FIXME: work on arbitrary qualifiers 3624 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3625 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3626 if (getAddressSpace() != Other.getAddressSpace()) 3627 return false; 3628 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3629} 3630 3631/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3632/// as qualified as the Other type. For example, "const volatile 3633/// int" is at least as qualified as "const int", "volatile int", 3634/// "int", and "const volatile int". 3635inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3636 // FIXME: work on arbitrary qualifiers 3637 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3638 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3639 if (getAddressSpace() != Other.getAddressSpace()) 3640 return false; 3641 return (MyQuals | OtherQuals) == MyQuals; 3642} 3643 3644/// getNonReferenceType - If Type is a reference type (e.g., const 3645/// int&), returns the type that the reference refers to ("const 3646/// int"). Otherwise, returns the type itself. This routine is used 3647/// throughout Sema to implement C++ 5p6: 3648/// 3649/// If an expression initially has the type "reference to T" (8.3.2, 3650/// 8.5.3), the type is adjusted to "T" prior to any further 3651/// analysis, the expression designates the object or function 3652/// denoted by the reference, and the expression is an lvalue. 3653inline QualType QualType::getNonReferenceType() const { 3654 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3655 return RefType->getPointeeType(); 3656 else 3657 return *this; 3658} 3659 3660inline bool Type::isFunctionType() const { 3661 return isa<FunctionType>(CanonicalType); 3662} 3663inline bool Type::isPointerType() const { 3664 return isa<PointerType>(CanonicalType); 3665} 3666inline bool Type::isAnyPointerType() const { 3667 return isPointerType() || isObjCObjectPointerType(); 3668} 3669inline bool Type::isBlockPointerType() const { 3670 return isa<BlockPointerType>(CanonicalType); 3671} 3672inline bool Type::isReferenceType() const { 3673 return isa<ReferenceType>(CanonicalType); 3674} 3675inline bool Type::isLValueReferenceType() const { 3676 return isa<LValueReferenceType>(CanonicalType); 3677} 3678inline bool Type::isRValueReferenceType() const { 3679 return isa<RValueReferenceType>(CanonicalType); 3680} 3681inline bool Type::isFunctionPointerType() const { 3682 if (const PointerType* T = getAs<PointerType>()) 3683 return T->getPointeeType()->isFunctionType(); 3684 else 3685 return false; 3686} 3687inline bool Type::isMemberPointerType() const { 3688 return isa<MemberPointerType>(CanonicalType); 3689} 3690inline bool Type::isMemberFunctionPointerType() const { 3691 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3692 return T->isMemberFunctionPointer(); 3693 else 3694 return false; 3695} 3696inline bool Type::isMemberDataPointerType() const { 3697 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3698 return T->isMemberDataPointer(); 3699 else 3700 return false; 3701} 3702inline bool Type::isArrayType() const { 3703 return isa<ArrayType>(CanonicalType); 3704} 3705inline bool Type::isConstantArrayType() const { 3706 return isa<ConstantArrayType>(CanonicalType); 3707} 3708inline bool Type::isIncompleteArrayType() const { 3709 return isa<IncompleteArrayType>(CanonicalType); 3710} 3711inline bool Type::isVariableArrayType() const { 3712 return isa<VariableArrayType>(CanonicalType); 3713} 3714inline bool Type::isDependentSizedArrayType() const { 3715 return isa<DependentSizedArrayType>(CanonicalType); 3716} 3717inline bool Type::isBuiltinType() const { 3718 return isa<BuiltinType>(CanonicalType); 3719} 3720inline bool Type::isRecordType() const { 3721 return isa<RecordType>(CanonicalType); 3722} 3723inline bool Type::isEnumeralType() const { 3724 return isa<EnumType>(CanonicalType); 3725} 3726inline bool Type::isAnyComplexType() const { 3727 return isa<ComplexType>(CanonicalType); 3728} 3729inline bool Type::isVectorType() const { 3730 return isa<VectorType>(CanonicalType); 3731} 3732inline bool Type::isExtVectorType() const { 3733 return isa<ExtVectorType>(CanonicalType); 3734} 3735inline bool Type::isObjCObjectPointerType() const { 3736 return isa<ObjCObjectPointerType>(CanonicalType); 3737} 3738inline bool Type::isObjCObjectType() const { 3739 return isa<ObjCObjectType>(CanonicalType); 3740} 3741inline bool Type::isObjCObjectOrInterfaceType() const { 3742 return isa<ObjCInterfaceType>(CanonicalType) || 3743 isa<ObjCObjectType>(CanonicalType); 3744} 3745 3746inline bool Type::isObjCQualifiedIdType() const { 3747 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3748 return OPT->isObjCQualifiedIdType(); 3749 return false; 3750} 3751inline bool Type::isObjCQualifiedClassType() const { 3752 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3753 return OPT->isObjCQualifiedClassType(); 3754 return false; 3755} 3756inline bool Type::isObjCIdType() const { 3757 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3758 return OPT->isObjCIdType(); 3759 return false; 3760} 3761inline bool Type::isObjCClassType() const { 3762 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3763 return OPT->isObjCClassType(); 3764 return false; 3765} 3766inline bool Type::isObjCSelType() const { 3767 if (const PointerType *OPT = getAs<PointerType>()) 3768 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3769 return false; 3770} 3771inline bool Type::isObjCBuiltinType() const { 3772 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3773} 3774inline bool Type::isTemplateTypeParmType() const { 3775 return isa<TemplateTypeParmType>(CanonicalType); 3776} 3777 3778inline bool Type::isSpecificBuiltinType(unsigned K) const { 3779 if (const BuiltinType *BT = getAs<BuiltinType>()) 3780 if (BT->getKind() == (BuiltinType::Kind) K) 3781 return true; 3782 return false; 3783} 3784 3785inline bool Type::isPlaceholderType() const { 3786 if (const BuiltinType *BT = getAs<BuiltinType>()) 3787 return BT->isPlaceholderType(); 3788 return false; 3789} 3790 3791/// \brief Determines whether this is a type for which one can define 3792/// an overloaded operator. 3793inline bool Type::isOverloadableType() const { 3794 return isDependentType() || isRecordType() || isEnumeralType(); 3795} 3796 3797inline bool Type::hasPointerRepresentation() const { 3798 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3799 isObjCObjectPointerType() || isNullPtrType()); 3800} 3801 3802inline bool Type::hasObjCPointerRepresentation() const { 3803 return isObjCObjectPointerType(); 3804} 3805 3806/// Insertion operator for diagnostics. This allows sending QualType's into a 3807/// diagnostic with <<. 3808inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3809 QualType T) { 3810 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3811 Diagnostic::ak_qualtype); 3812 return DB; 3813} 3814 3815/// Insertion operator for partial diagnostics. This allows sending QualType's 3816/// into a diagnostic with <<. 3817inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3818 QualType T) { 3819 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3820 Diagnostic::ak_qualtype); 3821 return PD; 3822} 3823 3824// Helper class template that is used by Type::getAs to ensure that one does 3825// not try to look through a qualified type to get to an array type. 3826template<typename T, 3827 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3828 llvm::is_base_of<ArrayType, T>::value)> 3829struct ArrayType_cannot_be_used_with_getAs { }; 3830 3831template<typename T> 3832struct ArrayType_cannot_be_used_with_getAs<T, true>; 3833 3834/// Member-template getAs<specific type>'. 3835template <typename T> const T *Type::getAs() const { 3836 ArrayType_cannot_be_used_with_getAs<T> at; 3837 (void)at; 3838 3839 // If this is directly a T type, return it. 3840 if (const T *Ty = dyn_cast<T>(this)) 3841 return Ty; 3842 3843 // If the canonical form of this type isn't the right kind, reject it. 3844 if (!isa<T>(CanonicalType)) 3845 return 0; 3846 3847 // If this is a typedef for the type, strip the typedef off without 3848 // losing all typedef information. 3849 return cast<T>(getUnqualifiedDesugaredType()); 3850} 3851 3852} // end namespace clang 3853 3854#endif 3855