Type.h revision 43c0a4cae05cf78225d5996cf7d62d7a133d665c
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/AST/NestedNameSpecifier.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 95 class ElaboratedType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool isSupersetOf(Qualifiers Other) const; 275 276 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 277 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 278 279 operator bool() const { return hasQualifiers(); } 280 281 Qualifiers &operator+=(Qualifiers R) { 282 addQualifiers(R); 283 return *this; 284 } 285 286 // Union two qualifier sets. If an enumerated qualifier appears 287 // in both sets, use the one from the right. 288 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 289 L += R; 290 return L; 291 } 292 293 Qualifiers &operator-=(Qualifiers R) { 294 Mask = Mask & ~(R.Mask); 295 return *this; 296 } 297 298 /// \brief Compute the difference between two qualifier sets. 299 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 300 L -= R; 301 return L; 302 } 303 304 std::string getAsString() const; 305 std::string getAsString(const PrintingPolicy &Policy) const { 306 std::string Buffer; 307 getAsStringInternal(Buffer, Policy); 308 return Buffer; 309 } 310 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 311 312 void Profile(llvm::FoldingSetNodeID &ID) const { 313 ID.AddInteger(Mask); 314 } 315 316private: 317 318 // bits: |0 1 2|3 .. 4|5 .. 31| 319 // |C R V|GCAttr|AddrSpace| 320 uint32_t Mask; 321 322 static const uint32_t GCAttrMask = 0x18; 323 static const uint32_t GCAttrShift = 3; 324 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 325 static const uint32_t AddressSpaceShift = 5; 326}; 327 328 329/// ExtQuals - We can encode up to three bits in the low bits of a 330/// type pointer, but there are many more type qualifiers that we want 331/// to be able to apply to an arbitrary type. Therefore we have this 332/// struct, intended to be heap-allocated and used by QualType to 333/// store qualifiers. 334/// 335/// The current design tags the 'const' and 'restrict' qualifiers in 336/// two low bits on the QualType pointer; a third bit records whether 337/// the pointer is an ExtQuals node. 'const' was chosen because it is 338/// orders of magnitude more common than the other two qualifiers, in 339/// both library and user code. It's relatively rare to see 340/// 'restrict' in user code, but many standard C headers are saturated 341/// with 'restrict' declarations, so that representing them efficiently 342/// is a critical goal of this representation. 343class ExtQuals : public llvm::FoldingSetNode { 344 // NOTE: changing the fast qualifiers should be straightforward as 345 // long as you don't make 'const' non-fast. 346 // 1. Qualifiers: 347 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 348 // Fast qualifiers must occupy the low-order bits. 349 // b) Update Qualifiers::FastWidth and FastMask. 350 // 2. QualType: 351 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 352 // b) Update remove{Volatile,Restrict}, defined near the end of 353 // this header. 354 // 3. ASTContext: 355 // a) Update get{Volatile,Restrict}Type. 356 357 /// Context - the context to which this set belongs. We save this 358 /// here so that QualifierCollector can use it to reapply extended 359 /// qualifiers to an arbitrary type without requiring a context to 360 /// be pushed through every single API dealing with qualifiers. 361 ASTContext& Context; 362 363 /// BaseType - the underlying type that this qualifies 364 const Type *BaseType; 365 366 /// Quals - the immutable set of qualifiers applied by this 367 /// node; always contains extended qualifiers. 368 Qualifiers Quals; 369 370public: 371 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 372 : Context(Context), BaseType(Base), Quals(Quals) 373 { 374 assert(Quals.hasNonFastQualifiers() 375 && "ExtQuals created with no fast qualifiers"); 376 assert(!Quals.hasFastQualifiers() 377 && "ExtQuals created with fast qualifiers"); 378 } 379 380 Qualifiers getQualifiers() const { return Quals; } 381 382 bool hasVolatile() const { return Quals.hasVolatile(); } 383 384 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 385 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 386 387 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 388 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 389 390 const Type *getBaseType() const { return BaseType; } 391 392 ASTContext &getContext() const { return Context; } 393 394public: 395 void Profile(llvm::FoldingSetNodeID &ID) const { 396 Profile(ID, getBaseType(), Quals); 397 } 398 static void Profile(llvm::FoldingSetNodeID &ID, 399 const Type *BaseType, 400 Qualifiers Quals) { 401 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 402 ID.AddPointer(BaseType); 403 Quals.Profile(ID); 404 } 405}; 406 407/// CallingConv - Specifies the calling convention that a function uses. 408enum CallingConv { 409 CC_Default, 410 CC_C, // __attribute__((cdecl)) 411 CC_X86StdCall, // __attribute__((stdcall)) 412 CC_X86FastCall, // __attribute__((fastcall)) 413 CC_X86ThisCall, // __attribute__((thiscall)) 414 CC_X86Pascal // __attribute__((pascal)) 415}; 416 417 418/// QualType - For efficiency, we don't store CV-qualified types as nodes on 419/// their own: instead each reference to a type stores the qualifiers. This 420/// greatly reduces the number of nodes we need to allocate for types (for 421/// example we only need one for 'int', 'const int', 'volatile int', 422/// 'const volatile int', etc). 423/// 424/// As an added efficiency bonus, instead of making this a pair, we 425/// just store the two bits we care about in the low bits of the 426/// pointer. To handle the packing/unpacking, we make QualType be a 427/// simple wrapper class that acts like a smart pointer. A third bit 428/// indicates whether there are extended qualifiers present, in which 429/// case the pointer points to a special structure. 430class QualType { 431 // Thankfully, these are efficiently composable. 432 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 433 Qualifiers::FastWidth> Value; 434 435 const ExtQuals *getExtQualsUnsafe() const { 436 return Value.getPointer().get<const ExtQuals*>(); 437 } 438 439 const Type *getTypePtrUnsafe() const { 440 return Value.getPointer().get<const Type*>(); 441 } 442 443 QualType getUnqualifiedTypeSlow() const; 444 445 friend class QualifierCollector; 446public: 447 QualType() {} 448 449 QualType(const Type *Ptr, unsigned Quals) 450 : Value(Ptr, Quals) {} 451 QualType(const ExtQuals *Ptr, unsigned Quals) 452 : Value(Ptr, Quals) {} 453 454 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 455 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 456 457 /// Retrieves a pointer to the underlying (unqualified) type. 458 /// This should really return a const Type, but it's not worth 459 /// changing all the users right now. 460 Type *getTypePtr() const { 461 if (hasLocalNonFastQualifiers()) 462 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 463 return const_cast<Type*>(getTypePtrUnsafe()); 464 } 465 466 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 467 static QualType getFromOpaquePtr(void *Ptr) { 468 QualType T; 469 T.Value.setFromOpaqueValue(Ptr); 470 return T; 471 } 472 473 Type &operator*() const { 474 return *getTypePtr(); 475 } 476 477 Type *operator->() const { 478 return getTypePtr(); 479 } 480 481 bool isCanonical() const; 482 bool isCanonicalAsParam() const; 483 484 /// isNull - Return true if this QualType doesn't point to a type yet. 485 bool isNull() const { 486 return Value.getPointer().isNull(); 487 } 488 489 /// \brief Determine whether this particular QualType instance has the 490 /// "const" qualifier set, without looking through typedefs that may have 491 /// added "const" at a different level. 492 bool isLocalConstQualified() const { 493 return (getLocalFastQualifiers() & Qualifiers::Const); 494 } 495 496 /// \brief Determine whether this type is const-qualified. 497 bool isConstQualified() const; 498 499 /// \brief Determine whether this particular QualType instance has the 500 /// "restrict" qualifier set, without looking through typedefs that may have 501 /// added "restrict" at a different level. 502 bool isLocalRestrictQualified() const { 503 return (getLocalFastQualifiers() & Qualifiers::Restrict); 504 } 505 506 /// \brief Determine whether this type is restrict-qualified. 507 bool isRestrictQualified() const; 508 509 /// \brief Determine whether this particular QualType instance has the 510 /// "volatile" qualifier set, without looking through typedefs that may have 511 /// added "volatile" at a different level. 512 bool isLocalVolatileQualified() const { 513 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 514 } 515 516 /// \brief Determine whether this type is volatile-qualified. 517 bool isVolatileQualified() const; 518 519 /// \brief Determine whether this particular QualType instance has any 520 /// qualifiers, without looking through any typedefs that might add 521 /// qualifiers at a different level. 522 bool hasLocalQualifiers() const { 523 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 524 } 525 526 /// \brief Determine whether this type has any qualifiers. 527 bool hasQualifiers() const; 528 529 /// \brief Determine whether this particular QualType instance has any 530 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 531 /// instance. 532 bool hasLocalNonFastQualifiers() const { 533 return Value.getPointer().is<const ExtQuals*>(); 534 } 535 536 /// \brief Retrieve the set of qualifiers local to this particular QualType 537 /// instance, not including any qualifiers acquired through typedefs or 538 /// other sugar. 539 Qualifiers getLocalQualifiers() const { 540 Qualifiers Quals; 541 if (hasLocalNonFastQualifiers()) 542 Quals = getExtQualsUnsafe()->getQualifiers(); 543 Quals.addFastQualifiers(getLocalFastQualifiers()); 544 return Quals; 545 } 546 547 /// \brief Retrieve the set of qualifiers applied to this type. 548 Qualifiers getQualifiers() const; 549 550 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 551 /// local to this particular QualType instance, not including any qualifiers 552 /// acquired through typedefs or other sugar. 553 unsigned getLocalCVRQualifiers() const { 554 unsigned CVR = getLocalFastQualifiers(); 555 if (isLocalVolatileQualified()) 556 CVR |= Qualifiers::Volatile; 557 return CVR; 558 } 559 560 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 561 /// applied to this type. 562 unsigned getCVRQualifiers() const; 563 564 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 565 /// applied to this type, looking through any number of unqualified array 566 /// types to their element types' qualifiers. 567 unsigned getCVRQualifiersThroughArrayTypes() const; 568 569 bool isConstant(ASTContext& Ctx) const { 570 return QualType::isConstant(*this, Ctx); 571 } 572 573 // Don't promise in the API that anything besides 'const' can be 574 // easily added. 575 576 /// addConst - add the specified type qualifier to this QualType. 577 void addConst() { 578 addFastQualifiers(Qualifiers::Const); 579 } 580 QualType withConst() const { 581 return withFastQualifiers(Qualifiers::Const); 582 } 583 584 void addFastQualifiers(unsigned TQs) { 585 assert(!(TQs & ~Qualifiers::FastMask) 586 && "non-fast qualifier bits set in mask!"); 587 Value.setInt(Value.getInt() | TQs); 588 } 589 590 // FIXME: The remove* functions are semantically broken, because they might 591 // not remove a qualifier stored on a typedef. Most of the with* functions 592 // have the same problem. 593 void removeConst(); 594 void removeVolatile(); 595 void removeRestrict(); 596 void removeCVRQualifiers(unsigned Mask); 597 598 void removeFastQualifiers() { Value.setInt(0); } 599 void removeFastQualifiers(unsigned Mask) { 600 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 601 Value.setInt(Value.getInt() & ~Mask); 602 } 603 604 // Creates a type with the given qualifiers in addition to any 605 // qualifiers already on this type. 606 QualType withFastQualifiers(unsigned TQs) const { 607 QualType T = *this; 608 T.addFastQualifiers(TQs); 609 return T; 610 } 611 612 // Creates a type with exactly the given fast qualifiers, removing 613 // any existing fast qualifiers. 614 QualType withExactFastQualifiers(unsigned TQs) const { 615 return withoutFastQualifiers().withFastQualifiers(TQs); 616 } 617 618 // Removes fast qualifiers, but leaves any extended qualifiers in place. 619 QualType withoutFastQualifiers() const { 620 QualType T = *this; 621 T.removeFastQualifiers(); 622 return T; 623 } 624 625 /// \brief Return this type with all of the instance-specific qualifiers 626 /// removed, but without removing any qualifiers that may have been applied 627 /// through typedefs. 628 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 629 630 /// \brief Return the unqualified form of the given type, which might be 631 /// desugared to eliminate qualifiers introduced via typedefs. 632 QualType getUnqualifiedType() const { 633 QualType T = getLocalUnqualifiedType(); 634 if (!T.hasQualifiers()) 635 return T; 636 637 return getUnqualifiedTypeSlow(); 638 } 639 640 bool isMoreQualifiedThan(QualType Other) const; 641 bool isAtLeastAsQualifiedAs(QualType Other) const; 642 QualType getNonReferenceType() const; 643 644 /// \brief Determine the type of a (typically non-lvalue) expression with the 645 /// specified result type. 646 /// 647 /// This routine should be used for expressions for which the return type is 648 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 649 /// an lvalue. It removes a top-level reference (since there are no 650 /// expressions of reference type) and deletes top-level cvr-qualifiers 651 /// from non-class types (in C++) or all types (in C). 652 QualType getNonLValueExprType(ASTContext &Context) const; 653 654 /// getDesugaredType - Return the specified type with any "sugar" removed from 655 /// the type. This takes off typedefs, typeof's etc. If the outer level of 656 /// the type is already concrete, it returns it unmodified. This is similar 657 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 658 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 659 /// concrete. 660 /// 661 /// Qualifiers are left in place. 662 QualType getDesugaredType() const { 663 return QualType::getDesugaredType(*this); 664 } 665 666 /// operator==/!= - Indicate whether the specified types and qualifiers are 667 /// identical. 668 friend bool operator==(const QualType &LHS, const QualType &RHS) { 669 return LHS.Value == RHS.Value; 670 } 671 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 672 return LHS.Value != RHS.Value; 673 } 674 std::string getAsString() const; 675 676 std::string getAsString(const PrintingPolicy &Policy) const { 677 std::string S; 678 getAsStringInternal(S, Policy); 679 return S; 680 } 681 void getAsStringInternal(std::string &Str, 682 const PrintingPolicy &Policy) const; 683 684 void dump(const char *s) const; 685 void dump() const; 686 687 void Profile(llvm::FoldingSetNodeID &ID) const { 688 ID.AddPointer(getAsOpaquePtr()); 689 } 690 691 /// getAddressSpace - Return the address space of this type. 692 inline unsigned getAddressSpace() const; 693 694 /// GCAttrTypesAttr - Returns gc attribute of this type. 695 inline Qualifiers::GC getObjCGCAttr() const; 696 697 /// isObjCGCWeak true when Type is objc's weak. 698 bool isObjCGCWeak() const { 699 return getObjCGCAttr() == Qualifiers::Weak; 700 } 701 702 /// isObjCGCStrong true when Type is objc's strong. 703 bool isObjCGCStrong() const { 704 return getObjCGCAttr() == Qualifiers::Strong; 705 } 706 707private: 708 // These methods are implemented in a separate translation unit; 709 // "static"-ize them to avoid creating temporary QualTypes in the 710 // caller. 711 static bool isConstant(QualType T, ASTContext& Ctx); 712 static QualType getDesugaredType(QualType T); 713}; 714 715} // end clang. 716 717namespace llvm { 718/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 719/// to a specific Type class. 720template<> struct simplify_type<const ::clang::QualType> { 721 typedef ::clang::Type* SimpleType; 722 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 723 return Val.getTypePtr(); 724 } 725}; 726template<> struct simplify_type< ::clang::QualType> 727 : public simplify_type<const ::clang::QualType> {}; 728 729// Teach SmallPtrSet that QualType is "basically a pointer". 730template<> 731class PointerLikeTypeTraits<clang::QualType> { 732public: 733 static inline void *getAsVoidPointer(clang::QualType P) { 734 return P.getAsOpaquePtr(); 735 } 736 static inline clang::QualType getFromVoidPointer(void *P) { 737 return clang::QualType::getFromOpaquePtr(P); 738 } 739 // Various qualifiers go in low bits. 740 enum { NumLowBitsAvailable = 0 }; 741}; 742 743} // end namespace llvm 744 745namespace clang { 746 747/// Type - This is the base class of the type hierarchy. A central concept 748/// with types is that each type always has a canonical type. A canonical type 749/// is the type with any typedef names stripped out of it or the types it 750/// references. For example, consider: 751/// 752/// typedef int foo; 753/// typedef foo* bar; 754/// 'int *' 'foo *' 'bar' 755/// 756/// There will be a Type object created for 'int'. Since int is canonical, its 757/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 758/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 759/// there is a PointerType that represents 'int*', which, like 'int', is 760/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 761/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 762/// is also 'int*'. 763/// 764/// Non-canonical types are useful for emitting diagnostics, without losing 765/// information about typedefs being used. Canonical types are useful for type 766/// comparisons (they allow by-pointer equality tests) and useful for reasoning 767/// about whether something has a particular form (e.g. is a function type), 768/// because they implicitly, recursively, strip all typedefs out of a type. 769/// 770/// Types, once created, are immutable. 771/// 772class Type { 773public: 774 enum TypeClass { 775#define TYPE(Class, Base) Class, 776#define LAST_TYPE(Class) TypeLast = Class, 777#define ABSTRACT_TYPE(Class, Base) 778#include "clang/AST/TypeNodes.def" 779 TagFirst = Record, TagLast = Enum 780 }; 781 782private: 783 Type(const Type&); // DO NOT IMPLEMENT. 784 void operator=(const Type&); // DO NOT IMPLEMENT. 785 786 QualType CanonicalType; 787 788 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 789 unsigned TC : 8; 790 791 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 792 /// Note that this should stay at the end of the ivars for Type so that 793 /// subclasses can pack their bitfields into the same word. 794 bool Dependent : 1; 795 796 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 797 bool VariablyModified : 1; 798 799 /// \brief Whether the linkage of this type along with the presence of any 800 /// local or unnamed types is already known. 801 mutable bool LinkageKnown : 1; 802 803 /// \brief Linkage of this type. 804 mutable unsigned CachedLinkage : 2; 805 806 /// \brief Whether this type involves and local or unnamed types. 807 mutable bool CachedLocalOrUnnamed : 1; 808 809 /// \brief FromAST - Whether this type comes from an AST file. 810 mutable bool FromAST : 1; 811 812 /// \brief Set whether this type comes from an AST file. 813 void setFromAST(bool V = true) const { 814 FromAST = V; 815 } 816 817protected: 818 /// \brief Compute the linkage of this type along with the presence of 819 /// any local or unnamed types. 820 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 821 822 enum { BitsRemainingInType = 17 }; 823 824 // silence VC++ warning C4355: 'this' : used in base member initializer list 825 Type *this_() { return this; } 826 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified) 827 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 828 TC(tc), Dependent(Dependent), VariablyModified(VariablyModified), 829 LinkageKnown(false), 830 CachedLinkage(NoLinkage), FromAST(false) {} 831 virtual ~Type(); 832 friend class ASTContext; 833 834 void setDependent(bool D = true) { Dependent = D; } 835 void setVariablyModified(bool VM = true) { VariablyModified = VM; } 836 837public: 838 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 839 840 /// \brief Whether this type comes from an AST file. 841 bool isFromAST() const { return FromAST; } 842 843 bool isCanonicalUnqualified() const { 844 return CanonicalType.getTypePtr() == this; 845 } 846 847 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 848 /// object types, function types, and incomplete types. 849 850 /// isIncompleteType - Return true if this is an incomplete type. 851 /// A type that can describe objects, but which lacks information needed to 852 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 853 /// routine will need to determine if the size is actually required. 854 bool isIncompleteType() const; 855 856 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 857 /// type, in other words, not a function type. 858 bool isIncompleteOrObjectType() const { 859 return !isFunctionType(); 860 } 861 862 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 863 bool isPODType() const; 864 865 /// isLiteralType - Return true if this is a literal type 866 /// (C++0x [basic.types]p10) 867 bool isLiteralType() const; 868 869 /// Helper methods to distinguish type categories. All type predicates 870 /// operate on the canonical type, ignoring typedefs and qualifiers. 871 872 /// isBuiltinType - returns true if the type is a builtin type. 873 bool isBuiltinType() const; 874 875 /// isSpecificBuiltinType - Test for a particular builtin type. 876 bool isSpecificBuiltinType(unsigned K) const; 877 878 /// isPlaceholderType - Test for a type which does not represent an 879 /// actual type-system type but is instead used as a placeholder for 880 /// various convenient purposes within Clang. All such types are 881 /// BuiltinTypes. 882 bool isPlaceholderType() const; 883 884 /// isIntegerType() does *not* include complex integers (a GCC extension). 885 /// isComplexIntegerType() can be used to test for complex integers. 886 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 887 bool isEnumeralType() const; 888 bool isBooleanType() const; 889 bool isCharType() const; 890 bool isWideCharType() const; 891 bool isAnyCharacterType() const; 892 bool isIntegralType(ASTContext &Ctx) const; 893 894 /// \brief Determine whether this type is an integral or enumeration type. 895 bool isIntegralOrEnumerationType() const; 896 /// \brief Determine whether this type is an integral or unscoped enumeration 897 /// type. 898 bool isIntegralOrUnscopedEnumerationType() const; 899 900 /// Floating point categories. 901 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 902 /// isComplexType() does *not* include complex integers (a GCC extension). 903 /// isComplexIntegerType() can be used to test for complex integers. 904 bool isComplexType() const; // C99 6.2.5p11 (complex) 905 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 906 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 907 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 908 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 909 bool isVoidType() const; // C99 6.2.5p19 910 bool isDerivedType() const; // C99 6.2.5p20 911 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 912 bool isAggregateType() const; 913 914 // Type Predicates: Check to see if this type is structurally the specified 915 // type, ignoring typedefs and qualifiers. 916 bool isFunctionType() const; 917 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 918 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 919 bool isPointerType() const; 920 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 921 bool isBlockPointerType() const; 922 bool isVoidPointerType() const; 923 bool isReferenceType() const; 924 bool isLValueReferenceType() const; 925 bool isRValueReferenceType() const; 926 bool isFunctionPointerType() const; 927 bool isMemberPointerType() const; 928 bool isMemberFunctionPointerType() const; 929 bool isMemberDataPointerType() const; 930 bool isArrayType() const; 931 bool isConstantArrayType() const; 932 bool isIncompleteArrayType() const; 933 bool isVariableArrayType() const; 934 bool isDependentSizedArrayType() const; 935 bool isRecordType() const; 936 bool isClassType() const; 937 bool isStructureType() const; 938 bool isStructureOrClassType() const; 939 bool isUnionType() const; 940 bool isComplexIntegerType() const; // GCC _Complex integer type. 941 bool isVectorType() const; // GCC vector type. 942 bool isExtVectorType() const; // Extended vector type. 943 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 944 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 945 // for the common case. 946 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 947 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 948 bool isObjCQualifiedIdType() const; // id<foo> 949 bool isObjCQualifiedClassType() const; // Class<foo> 950 bool isObjCObjectOrInterfaceType() const; 951 bool isObjCIdType() const; // id 952 bool isObjCClassType() const; // Class 953 bool isObjCSelType() const; // Class 954 bool isObjCBuiltinType() const; // 'id' or 'Class' 955 bool isTemplateTypeParmType() const; // C++ template type parameter 956 bool isNullPtrType() const; // C++0x nullptr_t 957 958 /// isDependentType - Whether this type is a dependent type, meaning 959 /// that its definition somehow depends on a template parameter 960 /// (C++ [temp.dep.type]). 961 bool isDependentType() const { return Dependent; } 962 963 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 964 bool isVariablyModifiedType() const { return VariablyModified; } 965 966 /// \brief Whether this type is or contains a local or unnamed type. 967 bool hasUnnamedOrLocalType() const; 968 969 bool isOverloadableType() const; 970 971 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 972 bool isElaboratedTypeSpecifier() const; 973 974 /// hasPointerRepresentation - Whether this type is represented 975 /// natively as a pointer; this includes pointers, references, block 976 /// pointers, and Objective-C interface, qualified id, and qualified 977 /// interface types, as well as nullptr_t. 978 bool hasPointerRepresentation() const; 979 980 /// hasObjCPointerRepresentation - Whether this type can represent 981 /// an objective pointer type for the purpose of GC'ability 982 bool hasObjCPointerRepresentation() const; 983 984 /// \brief Determine whether this type has an integer representation 985 /// of some sort, e.g., it is an integer type or a vector. 986 bool hasIntegerRepresentation() const; 987 988 /// \brief Determine whether this type has an signed integer representation 989 /// of some sort, e.g., it is an signed integer type or a vector. 990 bool hasSignedIntegerRepresentation() const; 991 992 /// \brief Determine whether this type has an unsigned integer representation 993 /// of some sort, e.g., it is an unsigned integer type or a vector. 994 bool hasUnsignedIntegerRepresentation() const; 995 996 /// \brief Determine whether this type has a floating-point representation 997 /// of some sort, e.g., it is a floating-point type or a vector thereof. 998 bool hasFloatingRepresentation() const; 999 1000 // Type Checking Functions: Check to see if this type is structurally the 1001 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1002 // the best type we can. 1003 const RecordType *getAsStructureType() const; 1004 /// NOTE: getAs*ArrayType are methods on ASTContext. 1005 const RecordType *getAsUnionType() const; 1006 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1007 // The following is a convenience method that returns an ObjCObjectPointerType 1008 // for object declared using an interface. 1009 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1010 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1011 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1012 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1013 1014 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1015 /// because the type is a RecordType or because it is the injected-class-name 1016 /// type of a class template or class template partial specialization. 1017 CXXRecordDecl *getAsCXXRecordDecl() const; 1018 1019 // Member-template getAs<specific type>'. Look through sugar for 1020 // an instance of <specific type>. This scheme will eventually 1021 // replace the specific getAsXXXX methods above. 1022 // 1023 // There are some specializations of this member template listed 1024 // immediately following this class. 1025 template <typename T> const T *getAs() const; 1026 1027 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1028 /// element type of the array, potentially with type qualifiers missing. 1029 /// This method should never be used when type qualifiers are meaningful. 1030 const Type *getArrayElementTypeNoTypeQual() const; 1031 1032 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1033 /// pointer, this returns the respective pointee. 1034 QualType getPointeeType() const; 1035 1036 /// getUnqualifiedDesugaredType() - Return the specified type with 1037 /// any "sugar" removed from the type, removing any typedefs, 1038 /// typeofs, etc., as well as any qualifiers. 1039 const Type *getUnqualifiedDesugaredType() const; 1040 1041 /// More type predicates useful for type checking/promotion 1042 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1043 1044 /// isSignedIntegerType - Return true if this is an integer type that is 1045 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1046 /// an enum decl which has a signed representation, or a vector of signed 1047 /// integer element type. 1048 bool isSignedIntegerType() const; 1049 1050 /// isUnsignedIntegerType - Return true if this is an integer type that is 1051 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1052 /// decl which has an unsigned representation, or a vector of unsigned integer 1053 /// element type. 1054 bool isUnsignedIntegerType() const; 1055 1056 /// isConstantSizeType - Return true if this is not a variable sized type, 1057 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1058 /// incomplete types. 1059 bool isConstantSizeType() const; 1060 1061 /// isSpecifierType - Returns true if this type can be represented by some 1062 /// set of type specifiers. 1063 bool isSpecifierType() const; 1064 1065 /// \brief Determine the linkage of this type. 1066 Linkage getLinkage() const; 1067 1068 /// \brief Note that the linkage is no longer known. 1069 void ClearLinkageCache(); 1070 1071 const char *getTypeClassName() const; 1072 1073 QualType getCanonicalTypeInternal() const { 1074 return CanonicalType; 1075 } 1076 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1077 void dump() const; 1078 static bool classof(const Type *) { return true; } 1079 1080 friend class ASTReader; 1081 friend class ASTWriter; 1082}; 1083 1084template <> inline const TypedefType *Type::getAs() const { 1085 return dyn_cast<TypedefType>(this); 1086} 1087 1088// We can do canonical leaf types faster, because we don't have to 1089// worry about preserving child type decoration. 1090#define TYPE(Class, Base) 1091#define LEAF_TYPE(Class) \ 1092template <> inline const Class##Type *Type::getAs() const { \ 1093 return dyn_cast<Class##Type>(CanonicalType); \ 1094} 1095#include "clang/AST/TypeNodes.def" 1096 1097 1098/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1099/// types are always canonical and have a literal name field. 1100class BuiltinType : public Type { 1101public: 1102 enum Kind { 1103 Void, 1104 1105 Bool, // This is bool and/or _Bool. 1106 Char_U, // This is 'char' for targets where char is unsigned. 1107 UChar, // This is explicitly qualified unsigned char. 1108 Char16, // This is 'char16_t' for C++. 1109 Char32, // This is 'char32_t' for C++. 1110 UShort, 1111 UInt, 1112 ULong, 1113 ULongLong, 1114 UInt128, // __uint128_t 1115 1116 Char_S, // This is 'char' for targets where char is signed. 1117 SChar, // This is explicitly qualified signed char. 1118 WChar, // This is 'wchar_t' for C++. 1119 Short, 1120 Int, 1121 Long, 1122 LongLong, 1123 Int128, // __int128_t 1124 1125 Float, Double, LongDouble, 1126 1127 NullPtr, // This is the type of C++0x 'nullptr'. 1128 1129 /// This represents the type of an expression whose type is 1130 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1131 /// appear in situations where the structure of the type is 1132 /// theoretically deducible. 1133 Dependent, 1134 1135 Overload, // This represents the type of an overloaded function declaration. 1136 1137 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1138 // that has not been deduced yet. 1139 1140 /// The primitive Objective C 'id' type. The type pointed to by the 1141 /// user-visible 'id' type. Only ever shows up in an AST as the base 1142 /// type of an ObjCObjectType. 1143 ObjCId, 1144 1145 /// The primitive Objective C 'Class' type. The type pointed to by the 1146 /// user-visible 'Class' type. Only ever shows up in an AST as the 1147 /// base type of an ObjCObjectType. 1148 ObjCClass, 1149 1150 ObjCSel // This represents the ObjC 'SEL' type. 1151 }; 1152private: 1153 Kind TypeKind; 1154 1155protected: 1156 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1157 1158public: 1159 BuiltinType(Kind K) 1160 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1161 /*VariablyModified=*/false), 1162 TypeKind(K) {} 1163 1164 Kind getKind() const { return TypeKind; } 1165 const char *getName(const LangOptions &LO) const; 1166 1167 bool isSugared() const { return false; } 1168 QualType desugar() const { return QualType(this, 0); } 1169 1170 bool isInteger() const { 1171 return TypeKind >= Bool && TypeKind <= Int128; 1172 } 1173 1174 bool isSignedInteger() const { 1175 return TypeKind >= Char_S && TypeKind <= Int128; 1176 } 1177 1178 bool isUnsignedInteger() const { 1179 return TypeKind >= Bool && TypeKind <= UInt128; 1180 } 1181 1182 bool isFloatingPoint() const { 1183 return TypeKind >= Float && TypeKind <= LongDouble; 1184 } 1185 1186 /// Determines whether this type is a "forbidden" placeholder type, 1187 /// i.e. a type which cannot appear in arbitrary positions in a 1188 /// fully-formed expression. 1189 bool isPlaceholderType() const { 1190 return TypeKind == Overload || 1191 TypeKind == UndeducedAuto; 1192 } 1193 1194 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1195 static bool classof(const BuiltinType *) { return true; } 1196}; 1197 1198/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1199/// types (_Complex float etc) as well as the GCC integer complex extensions. 1200/// 1201class ComplexType : public Type, public llvm::FoldingSetNode { 1202 QualType ElementType; 1203 ComplexType(QualType Element, QualType CanonicalPtr) : 1204 Type(Complex, CanonicalPtr, Element->isDependentType(), 1205 Element->isVariablyModifiedType()), 1206 ElementType(Element) { 1207 } 1208 friend class ASTContext; // ASTContext creates these. 1209 1210protected: 1211 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1212 1213public: 1214 QualType getElementType() const { return ElementType; } 1215 1216 bool isSugared() const { return false; } 1217 QualType desugar() const { return QualType(this, 0); } 1218 1219 void Profile(llvm::FoldingSetNodeID &ID) { 1220 Profile(ID, getElementType()); 1221 } 1222 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1223 ID.AddPointer(Element.getAsOpaquePtr()); 1224 } 1225 1226 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1227 static bool classof(const ComplexType *) { return true; } 1228}; 1229 1230/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1231/// 1232class PointerType : public Type, public llvm::FoldingSetNode { 1233 QualType PointeeType; 1234 1235 PointerType(QualType Pointee, QualType CanonicalPtr) : 1236 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1237 Pointee->isVariablyModifiedType()), 1238 PointeeType(Pointee) { 1239 } 1240 friend class ASTContext; // ASTContext creates these. 1241 1242protected: 1243 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1244 1245public: 1246 1247 QualType getPointeeType() const { return PointeeType; } 1248 1249 bool isSugared() const { return false; } 1250 QualType desugar() const { return QualType(this, 0); } 1251 1252 void Profile(llvm::FoldingSetNodeID &ID) { 1253 Profile(ID, getPointeeType()); 1254 } 1255 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1256 ID.AddPointer(Pointee.getAsOpaquePtr()); 1257 } 1258 1259 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1260 static bool classof(const PointerType *) { return true; } 1261}; 1262 1263/// BlockPointerType - pointer to a block type. 1264/// This type is to represent types syntactically represented as 1265/// "void (^)(int)", etc. Pointee is required to always be a function type. 1266/// 1267class BlockPointerType : public Type, public llvm::FoldingSetNode { 1268 QualType PointeeType; // Block is some kind of pointer type 1269 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1270 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1271 Pointee->isVariablyModifiedType()), 1272 PointeeType(Pointee) { 1273 } 1274 friend class ASTContext; // ASTContext creates these. 1275 1276protected: 1277 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1278 1279public: 1280 1281 // Get the pointee type. Pointee is required to always be a function type. 1282 QualType getPointeeType() const { return PointeeType; } 1283 1284 bool isSugared() const { return false; } 1285 QualType desugar() const { return QualType(this, 0); } 1286 1287 void Profile(llvm::FoldingSetNodeID &ID) { 1288 Profile(ID, getPointeeType()); 1289 } 1290 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1291 ID.AddPointer(Pointee.getAsOpaquePtr()); 1292 } 1293 1294 static bool classof(const Type *T) { 1295 return T->getTypeClass() == BlockPointer; 1296 } 1297 static bool classof(const BlockPointerType *) { return true; } 1298}; 1299 1300/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1301/// 1302class ReferenceType : public Type, public llvm::FoldingSetNode { 1303 QualType PointeeType; 1304 1305 /// True if the type was originally spelled with an lvalue sigil. 1306 /// This is never true of rvalue references but can also be false 1307 /// on lvalue references because of C++0x [dcl.typedef]p9, 1308 /// as follows: 1309 /// 1310 /// typedef int &ref; // lvalue, spelled lvalue 1311 /// typedef int &&rvref; // rvalue 1312 /// ref &a; // lvalue, inner ref, spelled lvalue 1313 /// ref &&a; // lvalue, inner ref 1314 /// rvref &a; // lvalue, inner ref, spelled lvalue 1315 /// rvref &&a; // rvalue, inner ref 1316 bool SpelledAsLValue; 1317 1318 /// True if the inner type is a reference type. This only happens 1319 /// in non-canonical forms. 1320 bool InnerRef; 1321 1322protected: 1323 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1324 bool SpelledAsLValue) : 1325 Type(tc, CanonicalRef, Referencee->isDependentType(), 1326 Referencee->isVariablyModifiedType()), 1327 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1328 InnerRef(Referencee->isReferenceType()) { 1329 } 1330 1331 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1332 1333public: 1334 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1335 bool isInnerRef() const { return InnerRef; } 1336 1337 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1338 QualType getPointeeType() const { 1339 // FIXME: this might strip inner qualifiers; okay? 1340 const ReferenceType *T = this; 1341 while (T->InnerRef) 1342 T = T->PointeeType->getAs<ReferenceType>(); 1343 return T->PointeeType; 1344 } 1345 1346 void Profile(llvm::FoldingSetNodeID &ID) { 1347 Profile(ID, PointeeType, SpelledAsLValue); 1348 } 1349 static void Profile(llvm::FoldingSetNodeID &ID, 1350 QualType Referencee, 1351 bool SpelledAsLValue) { 1352 ID.AddPointer(Referencee.getAsOpaquePtr()); 1353 ID.AddBoolean(SpelledAsLValue); 1354 } 1355 1356 static bool classof(const Type *T) { 1357 return T->getTypeClass() == LValueReference || 1358 T->getTypeClass() == RValueReference; 1359 } 1360 static bool classof(const ReferenceType *) { return true; } 1361}; 1362 1363/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1364/// 1365class LValueReferenceType : public ReferenceType { 1366 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1367 bool SpelledAsLValue) : 1368 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1369 {} 1370 friend class ASTContext; // ASTContext creates these 1371public: 1372 bool isSugared() const { return false; } 1373 QualType desugar() const { return QualType(this, 0); } 1374 1375 static bool classof(const Type *T) { 1376 return T->getTypeClass() == LValueReference; 1377 } 1378 static bool classof(const LValueReferenceType *) { return true; } 1379}; 1380 1381/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1382/// 1383class RValueReferenceType : public ReferenceType { 1384 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1385 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1386 } 1387 friend class ASTContext; // ASTContext creates these 1388public: 1389 bool isSugared() const { return false; } 1390 QualType desugar() const { return QualType(this, 0); } 1391 1392 static bool classof(const Type *T) { 1393 return T->getTypeClass() == RValueReference; 1394 } 1395 static bool classof(const RValueReferenceType *) { return true; } 1396}; 1397 1398/// MemberPointerType - C++ 8.3.3 - Pointers to members 1399/// 1400class MemberPointerType : public Type, public llvm::FoldingSetNode { 1401 QualType PointeeType; 1402 /// The class of which the pointee is a member. Must ultimately be a 1403 /// RecordType, but could be a typedef or a template parameter too. 1404 const Type *Class; 1405 1406 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1407 Type(MemberPointer, CanonicalPtr, 1408 Cls->isDependentType() || Pointee->isDependentType(), 1409 Pointee->isVariablyModifiedType()), 1410 PointeeType(Pointee), Class(Cls) { 1411 } 1412 friend class ASTContext; // ASTContext creates these. 1413 1414protected: 1415 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1416 1417public: 1418 QualType getPointeeType() const { return PointeeType; } 1419 1420 /// Returns true if the member type (i.e. the pointee type) is a 1421 /// function type rather than a data-member type. 1422 bool isMemberFunctionPointer() const { 1423 return PointeeType->isFunctionProtoType(); 1424 } 1425 1426 /// Returns true if the member type (i.e. the pointee type) is a 1427 /// data type rather than a function type. 1428 bool isMemberDataPointer() const { 1429 return !PointeeType->isFunctionProtoType(); 1430 } 1431 1432 const Type *getClass() const { return Class; } 1433 1434 bool isSugared() const { return false; } 1435 QualType desugar() const { return QualType(this, 0); } 1436 1437 void Profile(llvm::FoldingSetNodeID &ID) { 1438 Profile(ID, getPointeeType(), getClass()); 1439 } 1440 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1441 const Type *Class) { 1442 ID.AddPointer(Pointee.getAsOpaquePtr()); 1443 ID.AddPointer(Class); 1444 } 1445 1446 static bool classof(const Type *T) { 1447 return T->getTypeClass() == MemberPointer; 1448 } 1449 static bool classof(const MemberPointerType *) { return true; } 1450}; 1451 1452/// ArrayType - C99 6.7.5.2 - Array Declarators. 1453/// 1454class ArrayType : public Type, public llvm::FoldingSetNode { 1455public: 1456 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1457 /// an array with a static size (e.g. int X[static 4]), or an array 1458 /// with a star size (e.g. int X[*]). 1459 /// 'static' is only allowed on function parameters. 1460 enum ArraySizeModifier { 1461 Normal, Static, Star 1462 }; 1463private: 1464 /// ElementType - The element type of the array. 1465 QualType ElementType; 1466 1467 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1468 /// NOTE: These fields are packed into the bitfields space in the Type class. 1469 unsigned SizeModifier : 2; 1470 1471 /// IndexTypeQuals - Capture qualifiers in declarations like: 1472 /// 'int X[static restrict 4]'. For function parameters only. 1473 unsigned IndexTypeQuals : 3; 1474 1475protected: 1476 // C++ [temp.dep.type]p1: 1477 // A type is dependent if it is... 1478 // - an array type constructed from any dependent type or whose 1479 // size is specified by a constant expression that is 1480 // value-dependent, 1481 ArrayType(TypeClass tc, QualType et, QualType can, 1482 ArraySizeModifier sm, unsigned tq) 1483 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1484 (tc == VariableArray || et->isVariablyModifiedType())), 1485 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1486 1487 friend class ASTContext; // ASTContext creates these. 1488 1489 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1490 1491public: 1492 QualType getElementType() const { return ElementType; } 1493 ArraySizeModifier getSizeModifier() const { 1494 return ArraySizeModifier(SizeModifier); 1495 } 1496 Qualifiers getIndexTypeQualifiers() const { 1497 return Qualifiers::fromCVRMask(IndexTypeQuals); 1498 } 1499 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1500 1501 static bool classof(const Type *T) { 1502 return T->getTypeClass() == ConstantArray || 1503 T->getTypeClass() == VariableArray || 1504 T->getTypeClass() == IncompleteArray || 1505 T->getTypeClass() == DependentSizedArray; 1506 } 1507 static bool classof(const ArrayType *) { return true; } 1508}; 1509 1510/// ConstantArrayType - This class represents the canonical version of 1511/// C arrays with a specified constant size. For example, the canonical 1512/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1513/// type is 'int' and the size is 404. 1514class ConstantArrayType : public ArrayType { 1515 llvm::APInt Size; // Allows us to unique the type. 1516 1517 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1518 ArraySizeModifier sm, unsigned tq) 1519 : ArrayType(ConstantArray, et, can, sm, tq), 1520 Size(size) {} 1521protected: 1522 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1523 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1524 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1525 friend class ASTContext; // ASTContext creates these. 1526public: 1527 const llvm::APInt &getSize() const { return Size; } 1528 bool isSugared() const { return false; } 1529 QualType desugar() const { return QualType(this, 0); } 1530 1531 1532 /// \brief Determine the number of bits required to address a member of 1533 // an array with the given element type and number of elements. 1534 static unsigned getNumAddressingBits(ASTContext &Context, 1535 QualType ElementType, 1536 const llvm::APInt &NumElements); 1537 1538 /// \brief Determine the maximum number of active bits that an array's size 1539 /// can require, which limits the maximum size of the array. 1540 static unsigned getMaxSizeBits(ASTContext &Context); 1541 1542 void Profile(llvm::FoldingSetNodeID &ID) { 1543 Profile(ID, getElementType(), getSize(), 1544 getSizeModifier(), getIndexTypeCVRQualifiers()); 1545 } 1546 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1547 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1548 unsigned TypeQuals) { 1549 ID.AddPointer(ET.getAsOpaquePtr()); 1550 ID.AddInteger(ArraySize.getZExtValue()); 1551 ID.AddInteger(SizeMod); 1552 ID.AddInteger(TypeQuals); 1553 } 1554 static bool classof(const Type *T) { 1555 return T->getTypeClass() == ConstantArray; 1556 } 1557 static bool classof(const ConstantArrayType *) { return true; } 1558}; 1559 1560/// IncompleteArrayType - This class represents C arrays with an unspecified 1561/// size. For example 'int A[]' has an IncompleteArrayType where the element 1562/// type is 'int' and the size is unspecified. 1563class IncompleteArrayType : public ArrayType { 1564 1565 IncompleteArrayType(QualType et, QualType can, 1566 ArraySizeModifier sm, unsigned tq) 1567 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1568 friend class ASTContext; // ASTContext creates these. 1569public: 1570 bool isSugared() const { return false; } 1571 QualType desugar() const { return QualType(this, 0); } 1572 1573 static bool classof(const Type *T) { 1574 return T->getTypeClass() == IncompleteArray; 1575 } 1576 static bool classof(const IncompleteArrayType *) { return true; } 1577 1578 friend class StmtIteratorBase; 1579 1580 void Profile(llvm::FoldingSetNodeID &ID) { 1581 Profile(ID, getElementType(), getSizeModifier(), 1582 getIndexTypeCVRQualifiers()); 1583 } 1584 1585 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1586 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1587 ID.AddPointer(ET.getAsOpaquePtr()); 1588 ID.AddInteger(SizeMod); 1589 ID.AddInteger(TypeQuals); 1590 } 1591}; 1592 1593/// VariableArrayType - This class represents C arrays with a specified size 1594/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1595/// Since the size expression is an arbitrary expression, we store it as such. 1596/// 1597/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1598/// should not be: two lexically equivalent variable array types could mean 1599/// different things, for example, these variables do not have the same type 1600/// dynamically: 1601/// 1602/// void foo(int x) { 1603/// int Y[x]; 1604/// ++x; 1605/// int Z[x]; 1606/// } 1607/// 1608class VariableArrayType : public ArrayType { 1609 /// SizeExpr - An assignment expression. VLA's are only permitted within 1610 /// a function block. 1611 Stmt *SizeExpr; 1612 /// Brackets - The left and right array brackets. 1613 SourceRange Brackets; 1614 1615 VariableArrayType(QualType et, QualType can, Expr *e, 1616 ArraySizeModifier sm, unsigned tq, 1617 SourceRange brackets) 1618 : ArrayType(VariableArray, et, can, sm, tq), 1619 SizeExpr((Stmt*) e), Brackets(brackets) {} 1620 friend class ASTContext; // ASTContext creates these. 1621 1622public: 1623 Expr *getSizeExpr() const { 1624 // We use C-style casts instead of cast<> here because we do not wish 1625 // to have a dependency of Type.h on Stmt.h/Expr.h. 1626 return (Expr*) SizeExpr; 1627 } 1628 SourceRange getBracketsRange() const { return Brackets; } 1629 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1630 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1631 1632 bool isSugared() const { return false; } 1633 QualType desugar() const { return QualType(this, 0); } 1634 1635 static bool classof(const Type *T) { 1636 return T->getTypeClass() == VariableArray; 1637 } 1638 static bool classof(const VariableArrayType *) { return true; } 1639 1640 friend class StmtIteratorBase; 1641 1642 void Profile(llvm::FoldingSetNodeID &ID) { 1643 assert(0 && "Cannnot unique VariableArrayTypes."); 1644 } 1645}; 1646 1647/// DependentSizedArrayType - This type represents an array type in 1648/// C++ whose size is a value-dependent expression. For example: 1649/// 1650/// \code 1651/// template<typename T, int Size> 1652/// class array { 1653/// T data[Size]; 1654/// }; 1655/// \endcode 1656/// 1657/// For these types, we won't actually know what the array bound is 1658/// until template instantiation occurs, at which point this will 1659/// become either a ConstantArrayType or a VariableArrayType. 1660class DependentSizedArrayType : public ArrayType { 1661 ASTContext &Context; 1662 1663 /// \brief An assignment expression that will instantiate to the 1664 /// size of the array. 1665 /// 1666 /// The expression itself might be NULL, in which case the array 1667 /// type will have its size deduced from an initializer. 1668 Stmt *SizeExpr; 1669 1670 /// Brackets - The left and right array brackets. 1671 SourceRange Brackets; 1672 1673 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1674 Expr *e, ArraySizeModifier sm, unsigned tq, 1675 SourceRange brackets) 1676 : ArrayType(DependentSizedArray, et, can, sm, tq), 1677 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1678 friend class ASTContext; // ASTContext creates these. 1679 1680public: 1681 Expr *getSizeExpr() const { 1682 // We use C-style casts instead of cast<> here because we do not wish 1683 // to have a dependency of Type.h on Stmt.h/Expr.h. 1684 return (Expr*) SizeExpr; 1685 } 1686 SourceRange getBracketsRange() const { return Brackets; } 1687 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1688 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1689 1690 bool isSugared() const { return false; } 1691 QualType desugar() const { return QualType(this, 0); } 1692 1693 static bool classof(const Type *T) { 1694 return T->getTypeClass() == DependentSizedArray; 1695 } 1696 static bool classof(const DependentSizedArrayType *) { return true; } 1697 1698 friend class StmtIteratorBase; 1699 1700 1701 void Profile(llvm::FoldingSetNodeID &ID) { 1702 Profile(ID, Context, getElementType(), 1703 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1704 } 1705 1706 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1707 QualType ET, ArraySizeModifier SizeMod, 1708 unsigned TypeQuals, Expr *E); 1709}; 1710 1711/// DependentSizedExtVectorType - This type represent an extended vector type 1712/// where either the type or size is dependent. For example: 1713/// @code 1714/// template<typename T, int Size> 1715/// class vector { 1716/// typedef T __attribute__((ext_vector_type(Size))) type; 1717/// } 1718/// @endcode 1719class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1720 ASTContext &Context; 1721 Expr *SizeExpr; 1722 /// ElementType - The element type of the array. 1723 QualType ElementType; 1724 SourceLocation loc; 1725 1726 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1727 QualType can, Expr *SizeExpr, SourceLocation loc) 1728 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 1729 ElementType->isVariablyModifiedType()), 1730 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1731 loc(loc) {} 1732 friend class ASTContext; 1733 1734public: 1735 Expr *getSizeExpr() const { return SizeExpr; } 1736 QualType getElementType() const { return ElementType; } 1737 SourceLocation getAttributeLoc() const { return loc; } 1738 1739 bool isSugared() const { return false; } 1740 QualType desugar() const { return QualType(this, 0); } 1741 1742 static bool classof(const Type *T) { 1743 return T->getTypeClass() == DependentSizedExtVector; 1744 } 1745 static bool classof(const DependentSizedExtVectorType *) { return true; } 1746 1747 void Profile(llvm::FoldingSetNodeID &ID) { 1748 Profile(ID, Context, getElementType(), getSizeExpr()); 1749 } 1750 1751 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1752 QualType ElementType, Expr *SizeExpr); 1753}; 1754 1755 1756/// VectorType - GCC generic vector type. This type is created using 1757/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1758/// bytes; or from an Altivec __vector or vector declaration. 1759/// Since the constructor takes the number of vector elements, the 1760/// client is responsible for converting the size into the number of elements. 1761class VectorType : public Type, public llvm::FoldingSetNode { 1762public: 1763 enum AltiVecSpecific { 1764 NotAltiVec, // is not AltiVec vector 1765 AltiVec, // is AltiVec vector 1766 Pixel, // is AltiVec 'vector Pixel' 1767 Bool // is AltiVec 'vector bool ...' 1768 }; 1769protected: 1770 /// ElementType - The element type of the vector. 1771 QualType ElementType; 1772 1773 /// NumElements - The number of elements in the vector. 1774 unsigned NumElements; 1775 1776 AltiVecSpecific AltiVecSpec; 1777 1778 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1779 AltiVecSpecific altiVecSpec) : 1780 Type(Vector, canonType, vecType->isDependentType(), 1781 vecType->isVariablyModifiedType()), 1782 ElementType(vecType), NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1783 1784 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1785 QualType canonType, AltiVecSpecific altiVecSpec) 1786 : Type(tc, canonType, vecType->isDependentType(), 1787 vecType->isVariablyModifiedType()), 1788 ElementType(vecType), 1789 NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1790 friend class ASTContext; // ASTContext creates these. 1791 1792 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 1793 1794public: 1795 1796 QualType getElementType() const { return ElementType; } 1797 unsigned getNumElements() const { return NumElements; } 1798 1799 bool isSugared() const { return false; } 1800 QualType desugar() const { return QualType(this, 0); } 1801 1802 AltiVecSpecific getAltiVecSpecific() const { return AltiVecSpec; } 1803 1804 void Profile(llvm::FoldingSetNodeID &ID) { 1805 Profile(ID, getElementType(), getNumElements(), getTypeClass(), AltiVecSpec); 1806 } 1807 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1808 unsigned NumElements, TypeClass TypeClass, 1809 unsigned AltiVecSpec) { 1810 ID.AddPointer(ElementType.getAsOpaquePtr()); 1811 ID.AddInteger(NumElements); 1812 ID.AddInteger(TypeClass); 1813 ID.AddInteger(AltiVecSpec); 1814 } 1815 1816 static bool classof(const Type *T) { 1817 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1818 } 1819 static bool classof(const VectorType *) { return true; } 1820}; 1821 1822/// ExtVectorType - Extended vector type. This type is created using 1823/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1824/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1825/// class enables syntactic extensions, like Vector Components for accessing 1826/// points, colors, and textures (modeled after OpenGL Shading Language). 1827class ExtVectorType : public VectorType { 1828 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1829 VectorType(ExtVector, vecType, nElements, canonType, NotAltiVec) {} 1830 friend class ASTContext; // ASTContext creates these. 1831public: 1832 static int getPointAccessorIdx(char c) { 1833 switch (c) { 1834 default: return -1; 1835 case 'x': return 0; 1836 case 'y': return 1; 1837 case 'z': return 2; 1838 case 'w': return 3; 1839 } 1840 } 1841 static int getNumericAccessorIdx(char c) { 1842 switch (c) { 1843 default: return -1; 1844 case '0': return 0; 1845 case '1': return 1; 1846 case '2': return 2; 1847 case '3': return 3; 1848 case '4': return 4; 1849 case '5': return 5; 1850 case '6': return 6; 1851 case '7': return 7; 1852 case '8': return 8; 1853 case '9': return 9; 1854 case 'A': 1855 case 'a': return 10; 1856 case 'B': 1857 case 'b': return 11; 1858 case 'C': 1859 case 'c': return 12; 1860 case 'D': 1861 case 'd': return 13; 1862 case 'E': 1863 case 'e': return 14; 1864 case 'F': 1865 case 'f': return 15; 1866 } 1867 } 1868 1869 static int getAccessorIdx(char c) { 1870 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1871 return getNumericAccessorIdx(c); 1872 } 1873 1874 bool isAccessorWithinNumElements(char c) const { 1875 if (int idx = getAccessorIdx(c)+1) 1876 return unsigned(idx-1) < NumElements; 1877 return false; 1878 } 1879 bool isSugared() const { return false; } 1880 QualType desugar() const { return QualType(this, 0); } 1881 1882 static bool classof(const Type *T) { 1883 return T->getTypeClass() == ExtVector; 1884 } 1885 static bool classof(const ExtVectorType *) { return true; } 1886}; 1887 1888/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1889/// class of FunctionNoProtoType and FunctionProtoType. 1890/// 1891class FunctionType : public Type { 1892 virtual void ANCHOR(); // Key function for FunctionType. 1893 1894 /// SubClassData - This field is owned by the subclass, put here to pack 1895 /// tightly with the ivars in Type. 1896 bool SubClassData : 1; 1897 1898 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1899 /// other bitfields. 1900 /// The qualifiers are part of FunctionProtoType because... 1901 /// 1902 /// C++ 8.3.5p4: The return type, the parameter type list and the 1903 /// cv-qualifier-seq, [...], are part of the function type. 1904 /// 1905 unsigned TypeQuals : 3; 1906 1907 /// NoReturn - Indicates if the function type is attribute noreturn. 1908 unsigned NoReturn : 1; 1909 1910 /// RegParm - How many arguments to pass inreg. 1911 unsigned RegParm : 3; 1912 1913 /// CallConv - The calling convention used by the function. 1914 unsigned CallConv : 3; 1915 1916 // The type returned by the function. 1917 QualType ResultType; 1918 1919 public: 1920 // This class is used for passing arround the information needed to 1921 // construct a call. It is not actually used for storage, just for 1922 // factoring together common arguments. 1923 // If you add a field (say Foo), other than the obvious places (both, constructors, 1924 // compile failures), what you need to update is 1925 // * Operetor== 1926 // * getFoo 1927 // * withFoo 1928 // * functionType. Add Foo, getFoo. 1929 // * ASTContext::getFooType 1930 // * ASTContext::mergeFunctionTypes 1931 // * FunctionNoProtoType::Profile 1932 // * FunctionProtoType::Profile 1933 // * TypePrinter::PrintFunctionProto 1934 // * AST read and write 1935 // * Codegen 1936 1937 class ExtInfo { 1938 public: 1939 // Constructor with no defaults. Use this when you know that you 1940 // have all the elements (when reading an AST file for example). 1941 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1942 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1943 1944 // Constructor with all defaults. Use when for example creating a 1945 // function know to use defaults. 1946 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1947 1948 bool getNoReturn() const { return NoReturn; } 1949 unsigned getRegParm() const { return RegParm; } 1950 CallingConv getCC() const { return CC; } 1951 1952 bool operator==(const ExtInfo &Other) const { 1953 return getNoReturn() == Other.getNoReturn() && 1954 getRegParm() == Other.getRegParm() && 1955 getCC() == Other.getCC(); 1956 } 1957 bool operator!=(const ExtInfo &Other) const { 1958 return !(*this == Other); 1959 } 1960 1961 // Note that we don't have setters. That is by design, use 1962 // the following with methods instead of mutating these objects. 1963 1964 ExtInfo withNoReturn(bool noReturn) const { 1965 return ExtInfo(noReturn, getRegParm(), getCC()); 1966 } 1967 1968 ExtInfo withRegParm(unsigned RegParm) const { 1969 return ExtInfo(getNoReturn(), RegParm, getCC()); 1970 } 1971 1972 ExtInfo withCallingConv(CallingConv cc) const { 1973 return ExtInfo(getNoReturn(), getRegParm(), cc); 1974 } 1975 1976 private: 1977 // True if we have __attribute__((noreturn)) 1978 bool NoReturn; 1979 // The value passed to __attribute__((regparm(x))) 1980 unsigned RegParm; 1981 // The calling convention as specified via 1982 // __attribute__((cdecl|stdcall|fastcall|thiscall|pascal)) 1983 CallingConv CC; 1984 }; 1985 1986protected: 1987 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1988 unsigned typeQuals, QualType Canonical, bool Dependent, 1989 bool VariablyModified, const ExtInfo &Info) 1990 : Type(tc, Canonical, Dependent, VariablyModified), 1991 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1992 NoReturn(Info.getNoReturn()), 1993 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1994 bool getSubClassData() const { return SubClassData; } 1995 unsigned getTypeQuals() const { return TypeQuals; } 1996public: 1997 1998 QualType getResultType() const { return ResultType; } 1999 2000 unsigned getRegParmType() const { return RegParm; } 2001 bool getNoReturnAttr() const { return NoReturn; } 2002 CallingConv getCallConv() const { return (CallingConv)CallConv; } 2003 ExtInfo getExtInfo() const { 2004 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 2005 } 2006 2007 /// \brief Determine the type of an expression that calls a function of 2008 /// this type. 2009 QualType getCallResultType(ASTContext &Context) const { 2010 return getResultType().getNonLValueExprType(Context); 2011 } 2012 2013 static llvm::StringRef getNameForCallConv(CallingConv CC); 2014 2015 static bool classof(const Type *T) { 2016 return T->getTypeClass() == FunctionNoProto || 2017 T->getTypeClass() == FunctionProto; 2018 } 2019 static bool classof(const FunctionType *) { return true; } 2020}; 2021 2022/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2023/// no information available about its arguments. 2024class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2025 FunctionNoProtoType(QualType Result, QualType Canonical, 2026 const ExtInfo &Info) 2027 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2028 /*Dependent=*/false, Result->isVariablyModifiedType(), 2029 Info) {} 2030 friend class ASTContext; // ASTContext creates these. 2031 2032protected: 2033 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 2034 2035public: 2036 // No additional state past what FunctionType provides. 2037 2038 bool isSugared() const { return false; } 2039 QualType desugar() const { return QualType(this, 0); } 2040 2041 void Profile(llvm::FoldingSetNodeID &ID) { 2042 Profile(ID, getResultType(), getExtInfo()); 2043 } 2044 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2045 const ExtInfo &Info) { 2046 ID.AddInteger(Info.getCC()); 2047 ID.AddInteger(Info.getRegParm()); 2048 ID.AddInteger(Info.getNoReturn()); 2049 ID.AddPointer(ResultType.getAsOpaquePtr()); 2050 } 2051 2052 static bool classof(const Type *T) { 2053 return T->getTypeClass() == FunctionNoProto; 2054 } 2055 static bool classof(const FunctionNoProtoType *) { return true; } 2056}; 2057 2058/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2059/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2060/// arguments, not as having a single void argument. Such a type can have an 2061/// exception specification, but this specification is not part of the canonical 2062/// type. 2063class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2064 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2065 bool isVariadic, unsigned typeQuals, bool hasExs, 2066 bool hasAnyExs, const QualType *ExArray, 2067 unsigned numExs, QualType Canonical, 2068 const ExtInfo &Info); 2069 2070 /// NumArgs - The number of arguments this function has, not counting '...'. 2071 unsigned NumArgs : 20; 2072 2073 /// NumExceptions - The number of types in the exception spec, if any. 2074 unsigned NumExceptions : 10; 2075 2076 /// HasExceptionSpec - Whether this function has an exception spec at all. 2077 bool HasExceptionSpec : 1; 2078 2079 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2080 bool AnyExceptionSpec : 1; 2081 2082 /// ArgInfo - There is an variable size array after the class in memory that 2083 /// holds the argument types. 2084 2085 /// Exceptions - There is another variable size array after ArgInfo that 2086 /// holds the exception types. 2087 2088 friend class ASTContext; // ASTContext creates these. 2089 2090protected: 2091 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 2092 2093public: 2094 unsigned getNumArgs() const { return NumArgs; } 2095 QualType getArgType(unsigned i) const { 2096 assert(i < NumArgs && "Invalid argument number!"); 2097 return arg_type_begin()[i]; 2098 } 2099 2100 bool hasExceptionSpec() const { return HasExceptionSpec; } 2101 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2102 unsigned getNumExceptions() const { return NumExceptions; } 2103 QualType getExceptionType(unsigned i) const { 2104 assert(i < NumExceptions && "Invalid exception number!"); 2105 return exception_begin()[i]; 2106 } 2107 bool hasEmptyExceptionSpec() const { 2108 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2109 getNumExceptions() == 0; 2110 } 2111 2112 bool isVariadic() const { return getSubClassData(); } 2113 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2114 2115 typedef const QualType *arg_type_iterator; 2116 arg_type_iterator arg_type_begin() const { 2117 return reinterpret_cast<const QualType *>(this+1); 2118 } 2119 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2120 2121 typedef const QualType *exception_iterator; 2122 exception_iterator exception_begin() const { 2123 // exceptions begin where arguments end 2124 return arg_type_end(); 2125 } 2126 exception_iterator exception_end() const { 2127 return exception_begin() + NumExceptions; 2128 } 2129 2130 bool isSugared() const { return false; } 2131 QualType desugar() const { return QualType(this, 0); } 2132 2133 static bool classof(const Type *T) { 2134 return T->getTypeClass() == FunctionProto; 2135 } 2136 static bool classof(const FunctionProtoType *) { return true; } 2137 2138 void Profile(llvm::FoldingSetNodeID &ID); 2139 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2140 arg_type_iterator ArgTys, unsigned NumArgs, 2141 bool isVariadic, unsigned TypeQuals, 2142 bool hasExceptionSpec, bool anyExceptionSpec, 2143 unsigned NumExceptions, exception_iterator Exs, 2144 const ExtInfo &ExtInfo); 2145}; 2146 2147 2148/// \brief Represents the dependent type named by a dependently-scoped 2149/// typename using declaration, e.g. 2150/// using typename Base<T>::foo; 2151/// Template instantiation turns these into the underlying type. 2152class UnresolvedUsingType : public Type { 2153 UnresolvedUsingTypenameDecl *Decl; 2154 2155 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2156 : Type(UnresolvedUsing, QualType(), true, false), 2157 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2158 friend class ASTContext; // ASTContext creates these. 2159public: 2160 2161 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2162 2163 bool isSugared() const { return false; } 2164 QualType desugar() const { return QualType(this, 0); } 2165 2166 static bool classof(const Type *T) { 2167 return T->getTypeClass() == UnresolvedUsing; 2168 } 2169 static bool classof(const UnresolvedUsingType *) { return true; } 2170 2171 void Profile(llvm::FoldingSetNodeID &ID) { 2172 return Profile(ID, Decl); 2173 } 2174 static void Profile(llvm::FoldingSetNodeID &ID, 2175 UnresolvedUsingTypenameDecl *D) { 2176 ID.AddPointer(D); 2177 } 2178}; 2179 2180 2181class TypedefType : public Type { 2182 TypedefDecl *Decl; 2183protected: 2184 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2185 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType()), 2186 Decl(const_cast<TypedefDecl*>(D)) { 2187 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2188 } 2189 friend class ASTContext; // ASTContext creates these. 2190public: 2191 2192 TypedefDecl *getDecl() const { return Decl; } 2193 2194 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2195 /// potentially looking through *all* consecutive typedefs. This returns the 2196 /// sum of the type qualifiers, so if you have: 2197 /// typedef const int A; 2198 /// typedef volatile A B; 2199 /// looking through the typedefs for B will give you "const volatile A". 2200 QualType LookThroughTypedefs() const; 2201 2202 bool isSugared() const { return true; } 2203 QualType desugar() const; 2204 2205 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2206 static bool classof(const TypedefType *) { return true; } 2207}; 2208 2209/// TypeOfExprType (GCC extension). 2210class TypeOfExprType : public Type { 2211 Expr *TOExpr; 2212 2213protected: 2214 TypeOfExprType(Expr *E, QualType can = QualType()); 2215 friend class ASTContext; // ASTContext creates these. 2216public: 2217 Expr *getUnderlyingExpr() const { return TOExpr; } 2218 2219 /// \brief Remove a single level of sugar. 2220 QualType desugar() const; 2221 2222 /// \brief Returns whether this type directly provides sugar. 2223 bool isSugared() const { return true; } 2224 2225 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2226 static bool classof(const TypeOfExprType *) { return true; } 2227}; 2228 2229/// \brief Internal representation of canonical, dependent 2230/// typeof(expr) types. 2231/// 2232/// This class is used internally by the ASTContext to manage 2233/// canonical, dependent types, only. Clients will only see instances 2234/// of this class via TypeOfExprType nodes. 2235class DependentTypeOfExprType 2236 : public TypeOfExprType, public llvm::FoldingSetNode { 2237 ASTContext &Context; 2238 2239public: 2240 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2241 : TypeOfExprType(E), Context(Context) { } 2242 2243 bool isSugared() const { return false; } 2244 QualType desugar() const { return QualType(this, 0); } 2245 2246 void Profile(llvm::FoldingSetNodeID &ID) { 2247 Profile(ID, Context, getUnderlyingExpr()); 2248 } 2249 2250 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2251 Expr *E); 2252}; 2253 2254/// TypeOfType (GCC extension). 2255class TypeOfType : public Type { 2256 QualType TOType; 2257 TypeOfType(QualType T, QualType can) 2258 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType()), 2259 TOType(T) { 2260 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2261 } 2262 friend class ASTContext; // ASTContext creates these. 2263public: 2264 QualType getUnderlyingType() const { return TOType; } 2265 2266 /// \brief Remove a single level of sugar. 2267 QualType desugar() const { return getUnderlyingType(); } 2268 2269 /// \brief Returns whether this type directly provides sugar. 2270 bool isSugared() const { return true; } 2271 2272 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2273 static bool classof(const TypeOfType *) { return true; } 2274}; 2275 2276/// DecltypeType (C++0x) 2277class DecltypeType : public Type { 2278 Expr *E; 2279 2280 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2281 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2282 // from it. 2283 QualType UnderlyingType; 2284 2285protected: 2286 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2287 friend class ASTContext; // ASTContext creates these. 2288public: 2289 Expr *getUnderlyingExpr() const { return E; } 2290 QualType getUnderlyingType() const { return UnderlyingType; } 2291 2292 /// \brief Remove a single level of sugar. 2293 QualType desugar() const { return getUnderlyingType(); } 2294 2295 /// \brief Returns whether this type directly provides sugar. 2296 bool isSugared() const { return !isDependentType(); } 2297 2298 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2299 static bool classof(const DecltypeType *) { return true; } 2300}; 2301 2302/// \brief Internal representation of canonical, dependent 2303/// decltype(expr) types. 2304/// 2305/// This class is used internally by the ASTContext to manage 2306/// canonical, dependent types, only. Clients will only see instances 2307/// of this class via DecltypeType nodes. 2308class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2309 ASTContext &Context; 2310 2311public: 2312 DependentDecltypeType(ASTContext &Context, Expr *E); 2313 2314 bool isSugared() const { return false; } 2315 QualType desugar() const { return QualType(this, 0); } 2316 2317 void Profile(llvm::FoldingSetNodeID &ID) { 2318 Profile(ID, Context, getUnderlyingExpr()); 2319 } 2320 2321 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2322 Expr *E); 2323}; 2324 2325class TagType : public Type { 2326 /// Stores the TagDecl associated with this type. The decl may point to any 2327 /// TagDecl that declares the entity. 2328 TagDecl * decl; 2329 2330protected: 2331 TagType(TypeClass TC, const TagDecl *D, QualType can); 2332 2333 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 2334 2335public: 2336 TagDecl *getDecl() const; 2337 2338 /// @brief Determines whether this type is in the process of being 2339 /// defined. 2340 bool isBeingDefined() const; 2341 2342 static bool classof(const Type *T) { 2343 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2344 } 2345 static bool classof(const TagType *) { return true; } 2346 static bool classof(const RecordType *) { return true; } 2347 static bool classof(const EnumType *) { return true; } 2348}; 2349 2350/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2351/// to detect TagType objects of structs/unions/classes. 2352class RecordType : public TagType { 2353protected: 2354 explicit RecordType(const RecordDecl *D) 2355 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2356 explicit RecordType(TypeClass TC, RecordDecl *D) 2357 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2358 friend class ASTContext; // ASTContext creates these. 2359public: 2360 2361 RecordDecl *getDecl() const { 2362 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2363 } 2364 2365 // FIXME: This predicate is a helper to QualType/Type. It needs to 2366 // recursively check all fields for const-ness. If any field is declared 2367 // const, it needs to return false. 2368 bool hasConstFields() const { return false; } 2369 2370 // FIXME: RecordType needs to check when it is created that all fields are in 2371 // the same address space, and return that. 2372 unsigned getAddressSpace() const { return 0; } 2373 2374 bool isSugared() const { return false; } 2375 QualType desugar() const { return QualType(this, 0); } 2376 2377 static bool classof(const TagType *T); 2378 static bool classof(const Type *T) { 2379 return isa<TagType>(T) && classof(cast<TagType>(T)); 2380 } 2381 static bool classof(const RecordType *) { return true; } 2382}; 2383 2384/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2385/// to detect TagType objects of enums. 2386class EnumType : public TagType { 2387 explicit EnumType(const EnumDecl *D) 2388 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2389 friend class ASTContext; // ASTContext creates these. 2390public: 2391 2392 EnumDecl *getDecl() const { 2393 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2394 } 2395 2396 bool isSugared() const { return false; } 2397 QualType desugar() const { return QualType(this, 0); } 2398 2399 static bool classof(const TagType *T); 2400 static bool classof(const Type *T) { 2401 return isa<TagType>(T) && classof(cast<TagType>(T)); 2402 } 2403 static bool classof(const EnumType *) { return true; } 2404}; 2405 2406class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2407 unsigned Depth : 15; 2408 unsigned Index : 16; 2409 unsigned ParameterPack : 1; 2410 IdentifierInfo *Name; 2411 2412 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2413 QualType Canon) 2414 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2415 /*VariablyModified=*/false), 2416 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2417 2418 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2419 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2420 /*VariablyModified=*/false), 2421 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2422 2423 friend class ASTContext; // ASTContext creates these 2424 2425public: 2426 unsigned getDepth() const { return Depth; } 2427 unsigned getIndex() const { return Index; } 2428 bool isParameterPack() const { return ParameterPack; } 2429 IdentifierInfo *getName() const { return Name; } 2430 2431 bool isSugared() const { return false; } 2432 QualType desugar() const { return QualType(this, 0); } 2433 2434 void Profile(llvm::FoldingSetNodeID &ID) { 2435 Profile(ID, Depth, Index, ParameterPack, Name); 2436 } 2437 2438 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2439 unsigned Index, bool ParameterPack, 2440 IdentifierInfo *Name) { 2441 ID.AddInteger(Depth); 2442 ID.AddInteger(Index); 2443 ID.AddBoolean(ParameterPack); 2444 ID.AddPointer(Name); 2445 } 2446 2447 static bool classof(const Type *T) { 2448 return T->getTypeClass() == TemplateTypeParm; 2449 } 2450 static bool classof(const TemplateTypeParmType *T) { return true; } 2451}; 2452 2453/// \brief Represents the result of substituting a type for a template 2454/// type parameter. 2455/// 2456/// Within an instantiated template, all template type parameters have 2457/// been replaced with these. They are used solely to record that a 2458/// type was originally written as a template type parameter; 2459/// therefore they are never canonical. 2460class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2461 // The original type parameter. 2462 const TemplateTypeParmType *Replaced; 2463 2464 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2465 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2466 Canon->isVariablyModifiedType()), 2467 Replaced(Param) { } 2468 2469 friend class ASTContext; 2470 2471public: 2472 IdentifierInfo *getName() const { return Replaced->getName(); } 2473 2474 /// Gets the template parameter that was substituted for. 2475 const TemplateTypeParmType *getReplacedParameter() const { 2476 return Replaced; 2477 } 2478 2479 /// Gets the type that was substituted for the template 2480 /// parameter. 2481 QualType getReplacementType() const { 2482 return getCanonicalTypeInternal(); 2483 } 2484 2485 bool isSugared() const { return true; } 2486 QualType desugar() const { return getReplacementType(); } 2487 2488 void Profile(llvm::FoldingSetNodeID &ID) { 2489 Profile(ID, getReplacedParameter(), getReplacementType()); 2490 } 2491 static void Profile(llvm::FoldingSetNodeID &ID, 2492 const TemplateTypeParmType *Replaced, 2493 QualType Replacement) { 2494 ID.AddPointer(Replaced); 2495 ID.AddPointer(Replacement.getAsOpaquePtr()); 2496 } 2497 2498 static bool classof(const Type *T) { 2499 return T->getTypeClass() == SubstTemplateTypeParm; 2500 } 2501 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2502}; 2503 2504/// \brief Represents the type of a template specialization as written 2505/// in the source code. 2506/// 2507/// Template specialization types represent the syntactic form of a 2508/// template-id that refers to a type, e.g., @c vector<int>. Some 2509/// template specialization types are syntactic sugar, whose canonical 2510/// type will point to some other type node that represents the 2511/// instantiation or class template specialization. For example, a 2512/// class template specialization type of @c vector<int> will refer to 2513/// a tag type for the instantiation 2514/// @c std::vector<int, std::allocator<int>>. 2515/// 2516/// Other template specialization types, for which the template name 2517/// is dependent, may be canonical types. These types are always 2518/// dependent. 2519class TemplateSpecializationType 2520 : public Type, public llvm::FoldingSetNode { 2521 /// \brief The name of the template being specialized. 2522 TemplateName Template; 2523 2524 /// \brief - The number of template arguments named in this class 2525 /// template specialization. 2526 unsigned NumArgs; 2527 2528 TemplateSpecializationType(TemplateName T, 2529 const TemplateArgument *Args, 2530 unsigned NumArgs, QualType Canon); 2531 2532 friend class ASTContext; // ASTContext creates these 2533 2534public: 2535 /// \brief Determine whether any of the given template arguments are 2536 /// dependent. 2537 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2538 unsigned NumArgs); 2539 2540 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2541 unsigned NumArgs); 2542 2543 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2544 2545 /// \brief Print a template argument list, including the '<' and '>' 2546 /// enclosing the template arguments. 2547 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2548 unsigned NumArgs, 2549 const PrintingPolicy &Policy); 2550 2551 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2552 unsigned NumArgs, 2553 const PrintingPolicy &Policy); 2554 2555 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2556 const PrintingPolicy &Policy); 2557 2558 /// True if this template specialization type matches a current 2559 /// instantiation in the context in which it is found. 2560 bool isCurrentInstantiation() const { 2561 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2562 } 2563 2564 typedef const TemplateArgument * iterator; 2565 2566 iterator begin() const { return getArgs(); } 2567 iterator end() const; // defined inline in TemplateBase.h 2568 2569 /// \brief Retrieve the name of the template that we are specializing. 2570 TemplateName getTemplateName() const { return Template; } 2571 2572 /// \brief Retrieve the template arguments. 2573 const TemplateArgument *getArgs() const { 2574 return reinterpret_cast<const TemplateArgument *>(this + 1); 2575 } 2576 2577 /// \brief Retrieve the number of template arguments. 2578 unsigned getNumArgs() const { return NumArgs; } 2579 2580 /// \brief Retrieve a specific template argument as a type. 2581 /// \precondition @c isArgType(Arg) 2582 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2583 2584 bool isSugared() const { 2585 return !isDependentType() || isCurrentInstantiation(); 2586 } 2587 QualType desugar() const { return getCanonicalTypeInternal(); } 2588 2589 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2590 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2591 } 2592 2593 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2594 const TemplateArgument *Args, 2595 unsigned NumArgs, 2596 ASTContext &Context); 2597 2598 static bool classof(const Type *T) { 2599 return T->getTypeClass() == TemplateSpecialization; 2600 } 2601 static bool classof(const TemplateSpecializationType *T) { return true; } 2602}; 2603 2604/// \brief The injected class name of a C++ class template or class 2605/// template partial specialization. Used to record that a type was 2606/// spelled with a bare identifier rather than as a template-id; the 2607/// equivalent for non-templated classes is just RecordType. 2608/// 2609/// Injected class name types are always dependent. Template 2610/// instantiation turns these into RecordTypes. 2611/// 2612/// Injected class name types are always canonical. This works 2613/// because it is impossible to compare an injected class name type 2614/// with the corresponding non-injected template type, for the same 2615/// reason that it is impossible to directly compare template 2616/// parameters from different dependent contexts: injected class name 2617/// types can only occur within the scope of a particular templated 2618/// declaration, and within that scope every template specialization 2619/// will canonicalize to the injected class name (when appropriate 2620/// according to the rules of the language). 2621class InjectedClassNameType : public Type { 2622 CXXRecordDecl *Decl; 2623 2624 /// The template specialization which this type represents. 2625 /// For example, in 2626 /// template <class T> class A { ... }; 2627 /// this is A<T>, whereas in 2628 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2629 /// this is A<B<X,Y> >. 2630 /// 2631 /// It is always unqualified, always a template specialization type, 2632 /// and always dependent. 2633 QualType InjectedType; 2634 2635 friend class ASTContext; // ASTContext creates these. 2636 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2637 // currently suitable for AST reading, too much 2638 // interdependencies. 2639 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2640 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2641 /*VariablyModified=*/false), 2642 Decl(D), InjectedType(TST) { 2643 assert(isa<TemplateSpecializationType>(TST)); 2644 assert(!TST.hasQualifiers()); 2645 assert(TST->isDependentType()); 2646 } 2647 2648public: 2649 QualType getInjectedSpecializationType() const { return InjectedType; } 2650 const TemplateSpecializationType *getInjectedTST() const { 2651 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2652 } 2653 2654 CXXRecordDecl *getDecl() const; 2655 2656 bool isSugared() const { return false; } 2657 QualType desugar() const { return QualType(this, 0); } 2658 2659 static bool classof(const Type *T) { 2660 return T->getTypeClass() == InjectedClassName; 2661 } 2662 static bool classof(const InjectedClassNameType *T) { return true; } 2663}; 2664 2665/// \brief The kind of a tag type. 2666enum TagTypeKind { 2667 /// \brief The "struct" keyword. 2668 TTK_Struct, 2669 /// \brief The "union" keyword. 2670 TTK_Union, 2671 /// \brief The "class" keyword. 2672 TTK_Class, 2673 /// \brief The "enum" keyword. 2674 TTK_Enum 2675}; 2676 2677/// \brief The elaboration keyword that precedes a qualified type name or 2678/// introduces an elaborated-type-specifier. 2679enum ElaboratedTypeKeyword { 2680 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2681 ETK_Struct, 2682 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2683 ETK_Union, 2684 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2685 ETK_Class, 2686 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2687 ETK_Enum, 2688 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2689 /// \c typename T::type. 2690 ETK_Typename, 2691 /// \brief No keyword precedes the qualified type name. 2692 ETK_None 2693}; 2694 2695/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2696/// The keyword in stored in the free bits of the base class. 2697/// Also provides a few static helpers for converting and printing 2698/// elaborated type keyword and tag type kind enumerations. 2699class TypeWithKeyword : public Type { 2700 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2701 unsigned Keyword : 3; 2702 2703protected: 2704 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2705 QualType Canonical, bool Dependent, bool VariablyModified) 2706 : Type(tc, Canonical, Dependent, VariablyModified), 2707 Keyword(Keyword) {} 2708 2709public: 2710 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2711 2712 ElaboratedTypeKeyword getKeyword() const { 2713 return static_cast<ElaboratedTypeKeyword>(Keyword); 2714 } 2715 2716 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2717 /// into an elaborated type keyword. 2718 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2719 2720 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2721 /// into a tag type kind. It is an error to provide a type specifier 2722 /// which *isn't* a tag kind here. 2723 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2724 2725 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2726 /// elaborated type keyword. 2727 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2728 2729 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2730 // a TagTypeKind. It is an error to provide an elaborated type keyword 2731 /// which *isn't* a tag kind here. 2732 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2733 2734 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2735 2736 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2737 2738 static const char *getTagTypeKindName(TagTypeKind Kind) { 2739 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2740 } 2741 2742 class CannotCastToThisType {}; 2743 static CannotCastToThisType classof(const Type *); 2744}; 2745 2746/// \brief Represents a type that was referred to using an elaborated type 2747/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2748/// or both. 2749/// 2750/// This type is used to keep track of a type name as written in the 2751/// source code, including tag keywords and any nested-name-specifiers. 2752/// The type itself is always "sugar", used to express what was written 2753/// in the source code but containing no additional semantic information. 2754class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2755 2756 /// \brief The nested name specifier containing the qualifier. 2757 NestedNameSpecifier *NNS; 2758 2759 /// \brief The type that this qualified name refers to. 2760 QualType NamedType; 2761 2762 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2763 QualType NamedType, QualType CanonType) 2764 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2765 NamedType->isDependentType(), 2766 NamedType->isVariablyModifiedType()), 2767 NNS(NNS), NamedType(NamedType) { 2768 assert(!(Keyword == ETK_None && NNS == 0) && 2769 "ElaboratedType cannot have elaborated type keyword " 2770 "and name qualifier both null."); 2771 } 2772 2773 friend class ASTContext; // ASTContext creates these 2774 2775public: 2776 ~ElaboratedType(); 2777 2778 /// \brief Retrieve the qualification on this type. 2779 NestedNameSpecifier *getQualifier() const { return NNS; } 2780 2781 /// \brief Retrieve the type named by the qualified-id. 2782 QualType getNamedType() const { return NamedType; } 2783 2784 /// \brief Remove a single level of sugar. 2785 QualType desugar() const { return getNamedType(); } 2786 2787 /// \brief Returns whether this type directly provides sugar. 2788 bool isSugared() const { return true; } 2789 2790 void Profile(llvm::FoldingSetNodeID &ID) { 2791 Profile(ID, getKeyword(), NNS, NamedType); 2792 } 2793 2794 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2795 NestedNameSpecifier *NNS, QualType NamedType) { 2796 ID.AddInteger(Keyword); 2797 ID.AddPointer(NNS); 2798 NamedType.Profile(ID); 2799 } 2800 2801 static bool classof(const Type *T) { 2802 return T->getTypeClass() == Elaborated; 2803 } 2804 static bool classof(const ElaboratedType *T) { return true; } 2805}; 2806 2807/// \brief Represents a qualified type name for which the type name is 2808/// dependent. 2809/// 2810/// DependentNameType represents a class of dependent types that involve a 2811/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2812/// name of a type. The DependentNameType may start with a "typename" (for a 2813/// typename-specifier), "class", "struct", "union", or "enum" (for a 2814/// dependent elaborated-type-specifier), or nothing (in contexts where we 2815/// know that we must be referring to a type, e.g., in a base class specifier). 2816class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2817 2818 /// \brief The nested name specifier containing the qualifier. 2819 NestedNameSpecifier *NNS; 2820 2821 /// \brief The type that this typename specifier refers to. 2822 const IdentifierInfo *Name; 2823 2824 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2825 const IdentifierInfo *Name, QualType CanonType) 2826 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 2827 /*VariablyModified=*/false), 2828 NNS(NNS), Name(Name) { 2829 assert(NNS->isDependent() && 2830 "DependentNameType requires a dependent nested-name-specifier"); 2831 } 2832 2833 friend class ASTContext; // ASTContext creates these 2834 2835public: 2836 virtual ~DependentNameType(); 2837 2838 /// \brief Retrieve the qualification on this type. 2839 NestedNameSpecifier *getQualifier() const { return NNS; } 2840 2841 /// \brief Retrieve the type named by the typename specifier as an 2842 /// identifier. 2843 /// 2844 /// This routine will return a non-NULL identifier pointer when the 2845 /// form of the original typename was terminated by an identifier, 2846 /// e.g., "typename T::type". 2847 const IdentifierInfo *getIdentifier() const { 2848 return Name; 2849 } 2850 2851 bool isSugared() const { return false; } 2852 QualType desugar() const { return QualType(this, 0); } 2853 2854 void Profile(llvm::FoldingSetNodeID &ID) { 2855 Profile(ID, getKeyword(), NNS, Name); 2856 } 2857 2858 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2859 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2860 ID.AddInteger(Keyword); 2861 ID.AddPointer(NNS); 2862 ID.AddPointer(Name); 2863 } 2864 2865 static bool classof(const Type *T) { 2866 return T->getTypeClass() == DependentName; 2867 } 2868 static bool classof(const DependentNameType *T) { return true; } 2869}; 2870 2871/// DependentTemplateSpecializationType - Represents a template 2872/// specialization type whose template cannot be resolved, e.g. 2873/// A<T>::template B<T> 2874class DependentTemplateSpecializationType : 2875 public TypeWithKeyword, public llvm::FoldingSetNode { 2876 2877 /// \brief The nested name specifier containing the qualifier. 2878 NestedNameSpecifier *NNS; 2879 2880 /// \brief The identifier of the template. 2881 const IdentifierInfo *Name; 2882 2883 /// \brief - The number of template arguments named in this class 2884 /// template specialization. 2885 unsigned NumArgs; 2886 2887 const TemplateArgument *getArgBuffer() const { 2888 return reinterpret_cast<const TemplateArgument*>(this+1); 2889 } 2890 TemplateArgument *getArgBuffer() { 2891 return reinterpret_cast<TemplateArgument*>(this+1); 2892 } 2893 2894 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 2895 NestedNameSpecifier *NNS, 2896 const IdentifierInfo *Name, 2897 unsigned NumArgs, 2898 const TemplateArgument *Args, 2899 QualType Canon); 2900 2901 friend class ASTContext; // ASTContext creates these 2902 2903public: 2904 virtual ~DependentTemplateSpecializationType(); 2905 2906 NestedNameSpecifier *getQualifier() const { return NNS; } 2907 const IdentifierInfo *getIdentifier() const { return Name; } 2908 2909 /// \brief Retrieve the template arguments. 2910 const TemplateArgument *getArgs() const { 2911 return getArgBuffer(); 2912 } 2913 2914 /// \brief Retrieve the number of template arguments. 2915 unsigned getNumArgs() const { return NumArgs; } 2916 2917 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2918 2919 typedef const TemplateArgument * iterator; 2920 iterator begin() const { return getArgs(); } 2921 iterator end() const; // inline in TemplateBase.h 2922 2923 bool isSugared() const { return false; } 2924 QualType desugar() const { return QualType(this, 0); } 2925 2926 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 2927 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 2928 } 2929 2930 static void Profile(llvm::FoldingSetNodeID &ID, 2931 ASTContext &Context, 2932 ElaboratedTypeKeyword Keyword, 2933 NestedNameSpecifier *Qualifier, 2934 const IdentifierInfo *Name, 2935 unsigned NumArgs, 2936 const TemplateArgument *Args); 2937 2938 static bool classof(const Type *T) { 2939 return T->getTypeClass() == DependentTemplateSpecialization; 2940 } 2941 static bool classof(const DependentTemplateSpecializationType *T) { 2942 return true; 2943 } 2944}; 2945 2946/// ObjCObjectType - Represents a class type in Objective C. 2947/// Every Objective C type is a combination of a base type and a 2948/// list of protocols. 2949/// 2950/// Given the following declarations: 2951/// @class C; 2952/// @protocol P; 2953/// 2954/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2955/// with base C and no protocols. 2956/// 2957/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2958/// 2959/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2960/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2961/// and no protocols. 2962/// 2963/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2964/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2965/// this should get its own sugar class to better represent the source. 2966class ObjCObjectType : public Type { 2967 // Pad the bit count up so that NumProtocols is 2-byte aligned 2968 unsigned : BitsRemainingInType - 16; 2969 2970 /// \brief The number of protocols stored after the 2971 /// ObjCObjectPointerType node. 2972 /// 2973 /// These protocols are those written directly on the type. If 2974 /// protocol qualifiers ever become additive, the iterators will 2975 /// get kindof complicated. 2976 /// 2977 /// In the canonical object type, these are sorted alphabetically 2978 /// and uniqued. 2979 unsigned NumProtocols : 16; 2980 2981 /// Either a BuiltinType or an InterfaceType or sugar for either. 2982 QualType BaseType; 2983 2984 ObjCProtocolDecl * const *getProtocolStorage() const { 2985 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2986 } 2987 2988 ObjCProtocolDecl **getProtocolStorage(); 2989 2990protected: 2991 ObjCObjectType(QualType Canonical, QualType Base, 2992 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2993 2994 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2995 ObjCObjectType(enum Nonce_ObjCInterface) 2996 : Type(ObjCInterface, QualType(), false, false), 2997 NumProtocols(0), 2998 BaseType(QualType(this_(), 0)) {} 2999 3000protected: 3001 std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; // key function 3002 3003public: 3004 /// getBaseType - Gets the base type of this object type. This is 3005 /// always (possibly sugar for) one of: 3006 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3007 /// user, which is a typedef for an ObjCPointerType) 3008 /// - the 'Class' builtin type (same caveat) 3009 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3010 QualType getBaseType() const { return BaseType; } 3011 3012 bool isObjCId() const { 3013 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3014 } 3015 bool isObjCClass() const { 3016 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3017 } 3018 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3019 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3020 bool isObjCUnqualifiedIdOrClass() const { 3021 if (!qual_empty()) return false; 3022 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3023 return T->getKind() == BuiltinType::ObjCId || 3024 T->getKind() == BuiltinType::ObjCClass; 3025 return false; 3026 } 3027 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3028 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3029 3030 /// Gets the interface declaration for this object type, if the base type 3031 /// really is an interface. 3032 ObjCInterfaceDecl *getInterface() const; 3033 3034 typedef ObjCProtocolDecl * const *qual_iterator; 3035 3036 qual_iterator qual_begin() const { return getProtocolStorage(); } 3037 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3038 3039 bool qual_empty() const { return getNumProtocols() == 0; } 3040 3041 /// getNumProtocols - Return the number of qualifying protocols in this 3042 /// interface type, or 0 if there are none. 3043 unsigned getNumProtocols() const { return NumProtocols; } 3044 3045 /// \brief Fetch a protocol by index. 3046 ObjCProtocolDecl *getProtocol(unsigned I) const { 3047 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3048 return qual_begin()[I]; 3049 } 3050 3051 bool isSugared() const { return false; } 3052 QualType desugar() const { return QualType(this, 0); } 3053 3054 static bool classof(const Type *T) { 3055 return T->getTypeClass() == ObjCObject || 3056 T->getTypeClass() == ObjCInterface; 3057 } 3058 static bool classof(const ObjCObjectType *) { return true; } 3059}; 3060 3061/// ObjCObjectTypeImpl - A class providing a concrete implementation 3062/// of ObjCObjectType, so as to not increase the footprint of 3063/// ObjCInterfaceType. Code outside of ASTContext and the core type 3064/// system should not reference this type. 3065class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3066 friend class ASTContext; 3067 3068 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3069 // will need to be modified. 3070 3071 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3072 ObjCProtocolDecl * const *Protocols, 3073 unsigned NumProtocols) 3074 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3075 3076public: 3077 void Profile(llvm::FoldingSetNodeID &ID); 3078 static void Profile(llvm::FoldingSetNodeID &ID, 3079 QualType Base, 3080 ObjCProtocolDecl *const *protocols, 3081 unsigned NumProtocols); 3082}; 3083 3084inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3085 return reinterpret_cast<ObjCProtocolDecl**>( 3086 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3087} 3088 3089/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3090/// object oriented design. They basically correspond to C++ classes. There 3091/// are two kinds of interface types, normal interfaces like "NSString" and 3092/// qualified interfaces, which are qualified with a protocol list like 3093/// "NSString<NSCopyable, NSAmazing>". 3094/// 3095/// ObjCInterfaceType guarantees the following properties when considered 3096/// as a subtype of its superclass, ObjCObjectType: 3097/// - There are no protocol qualifiers. To reinforce this, code which 3098/// tries to invoke the protocol methods via an ObjCInterfaceType will 3099/// fail to compile. 3100/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3101/// T->getBaseType() == QualType(T, 0). 3102class ObjCInterfaceType : public ObjCObjectType { 3103 ObjCInterfaceDecl *Decl; 3104 3105 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3106 : ObjCObjectType(Nonce_ObjCInterface), 3107 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3108 friend class ASTContext; // ASTContext creates these. 3109public: 3110 /// getDecl - Get the declaration of this interface. 3111 ObjCInterfaceDecl *getDecl() const { return Decl; } 3112 3113 bool isSugared() const { return false; } 3114 QualType desugar() const { return QualType(this, 0); } 3115 3116 static bool classof(const Type *T) { 3117 return T->getTypeClass() == ObjCInterface; 3118 } 3119 static bool classof(const ObjCInterfaceType *) { return true; } 3120 3121 // Nonsense to "hide" certain members of ObjCObjectType within this 3122 // class. People asking for protocols on an ObjCInterfaceType are 3123 // not going to get what they want: ObjCInterfaceTypes are 3124 // guaranteed to have no protocols. 3125 enum { 3126 qual_iterator, 3127 qual_begin, 3128 qual_end, 3129 getNumProtocols, 3130 getProtocol 3131 }; 3132}; 3133 3134inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3135 if (const ObjCInterfaceType *T = 3136 getBaseType()->getAs<ObjCInterfaceType>()) 3137 return T->getDecl(); 3138 return 0; 3139} 3140 3141/// ObjCObjectPointerType - Used to represent a pointer to an 3142/// Objective C object. These are constructed from pointer 3143/// declarators when the pointee type is an ObjCObjectType (or sugar 3144/// for one). In addition, the 'id' and 'Class' types are typedefs 3145/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3146/// are translated into these. 3147/// 3148/// Pointers to pointers to Objective C objects are still PointerTypes; 3149/// only the first level of pointer gets it own type implementation. 3150class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3151 QualType PointeeType; 3152 3153 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3154 : Type(ObjCObjectPointer, Canonical, false, false), 3155 PointeeType(Pointee) {} 3156 friend class ASTContext; // ASTContext creates these. 3157 3158protected: 3159 virtual std::pair<Linkage, bool> getLinkageUnnamedLocalImpl() const; 3160 3161public: 3162 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3163 /// The result will always be an ObjCObjectType or sugar thereof. 3164 QualType getPointeeType() const { return PointeeType; } 3165 3166 /// getObjCObjectType - Gets the type pointed to by this ObjC 3167 /// pointer. This method always returns non-null. 3168 /// 3169 /// This method is equivalent to getPointeeType() except that 3170 /// it discards any typedefs (or other sugar) between this 3171 /// type and the "outermost" object type. So for: 3172 /// @class A; @protocol P; @protocol Q; 3173 /// typedef A<P> AP; 3174 /// typedef A A1; 3175 /// typedef A1<P> A1P; 3176 /// typedef A1P<Q> A1PQ; 3177 /// For 'A*', getObjectType() will return 'A'. 3178 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3179 /// For 'AP*', getObjectType() will return 'A<P>'. 3180 /// For 'A1*', getObjectType() will return 'A'. 3181 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3182 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3183 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3184 /// adding protocols to a protocol-qualified base discards the 3185 /// old qualifiers (for now). But if it didn't, getObjectType() 3186 /// would return 'A1P<Q>' (and we'd have to make iterating over 3187 /// qualifiers more complicated). 3188 const ObjCObjectType *getObjectType() const { 3189 return PointeeType->getAs<ObjCObjectType>(); 3190 } 3191 3192 /// getInterfaceType - If this pointer points to an Objective C 3193 /// @interface type, gets the type for that interface. Any protocol 3194 /// qualifiers on the interface are ignored. 3195 /// 3196 /// \return null if the base type for this pointer is 'id' or 'Class' 3197 const ObjCInterfaceType *getInterfaceType() const { 3198 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3199 } 3200 3201 /// getInterfaceDecl - If this pointer points to an Objective @interface 3202 /// type, gets the declaration for that interface. 3203 /// 3204 /// \return null if the base type for this pointer is 'id' or 'Class' 3205 ObjCInterfaceDecl *getInterfaceDecl() const { 3206 return getObjectType()->getInterface(); 3207 } 3208 3209 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3210 /// its object type is the primitive 'id' type with no protocols. 3211 bool isObjCIdType() const { 3212 return getObjectType()->isObjCUnqualifiedId(); 3213 } 3214 3215 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3216 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3217 bool isObjCClassType() const { 3218 return getObjectType()->isObjCUnqualifiedClass(); 3219 } 3220 3221 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3222 /// non-empty set of protocols. 3223 bool isObjCQualifiedIdType() const { 3224 return getObjectType()->isObjCQualifiedId(); 3225 } 3226 3227 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3228 /// some non-empty set of protocols. 3229 bool isObjCQualifiedClassType() const { 3230 return getObjectType()->isObjCQualifiedClass(); 3231 } 3232 3233 /// An iterator over the qualifiers on the object type. Provided 3234 /// for convenience. This will always iterate over the full set of 3235 /// protocols on a type, not just those provided directly. 3236 typedef ObjCObjectType::qual_iterator qual_iterator; 3237 3238 qual_iterator qual_begin() const { 3239 return getObjectType()->qual_begin(); 3240 } 3241 qual_iterator qual_end() const { 3242 return getObjectType()->qual_end(); 3243 } 3244 bool qual_empty() const { return getObjectType()->qual_empty(); } 3245 3246 /// getNumProtocols - Return the number of qualifying protocols on 3247 /// the object type. 3248 unsigned getNumProtocols() const { 3249 return getObjectType()->getNumProtocols(); 3250 } 3251 3252 /// \brief Retrieve a qualifying protocol by index on the object 3253 /// type. 3254 ObjCProtocolDecl *getProtocol(unsigned I) const { 3255 return getObjectType()->getProtocol(I); 3256 } 3257 3258 bool isSugared() const { return false; } 3259 QualType desugar() const { return QualType(this, 0); } 3260 3261 void Profile(llvm::FoldingSetNodeID &ID) { 3262 Profile(ID, getPointeeType()); 3263 } 3264 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3265 ID.AddPointer(T.getAsOpaquePtr()); 3266 } 3267 static bool classof(const Type *T) { 3268 return T->getTypeClass() == ObjCObjectPointer; 3269 } 3270 static bool classof(const ObjCObjectPointerType *) { return true; } 3271}; 3272 3273/// A qualifier set is used to build a set of qualifiers. 3274class QualifierCollector : public Qualifiers { 3275 ASTContext *Context; 3276 3277public: 3278 QualifierCollector(Qualifiers Qs = Qualifiers()) 3279 : Qualifiers(Qs), Context(0) {} 3280 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3281 : Qualifiers(Qs), Context(&Context) {} 3282 3283 void setContext(ASTContext &C) { Context = &C; } 3284 3285 /// Collect any qualifiers on the given type and return an 3286 /// unqualified type. 3287 const Type *strip(QualType QT) { 3288 addFastQualifiers(QT.getLocalFastQualifiers()); 3289 if (QT.hasLocalNonFastQualifiers()) { 3290 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3291 Context = &EQ->getContext(); 3292 addQualifiers(EQ->getQualifiers()); 3293 return EQ->getBaseType(); 3294 } 3295 return QT.getTypePtrUnsafe(); 3296 } 3297 3298 /// Apply the collected qualifiers to the given type. 3299 QualType apply(QualType QT) const; 3300 3301 /// Apply the collected qualifiers to the given type. 3302 QualType apply(const Type* T) const; 3303 3304}; 3305 3306 3307// Inline function definitions. 3308 3309inline bool QualType::isCanonical() const { 3310 const Type *T = getTypePtr(); 3311 if (hasLocalQualifiers()) 3312 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3313 return T->isCanonicalUnqualified(); 3314} 3315 3316inline bool QualType::isCanonicalAsParam() const { 3317 if (hasLocalQualifiers()) return false; 3318 3319 const Type *T = getTypePtr(); 3320 if ((*this)->isPointerType()) { 3321 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3322 if (isa<VariableArrayType>(BaseType)) { 3323 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3324 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3325 if (VAT->getSizeExpr()) 3326 T = BaseType.getTypePtr(); 3327 } 3328 } 3329 return T->isCanonicalUnqualified() && 3330 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3331} 3332 3333inline bool QualType::isConstQualified() const { 3334 return isLocalConstQualified() || 3335 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3336} 3337 3338inline bool QualType::isRestrictQualified() const { 3339 return isLocalRestrictQualified() || 3340 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3341} 3342 3343 3344inline bool QualType::isVolatileQualified() const { 3345 return isLocalVolatileQualified() || 3346 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3347} 3348 3349inline bool QualType::hasQualifiers() const { 3350 return hasLocalQualifiers() || 3351 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3352} 3353 3354inline Qualifiers QualType::getQualifiers() const { 3355 Qualifiers Quals = getLocalQualifiers(); 3356 Quals.addQualifiers( 3357 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3358 return Quals; 3359} 3360 3361inline unsigned QualType::getCVRQualifiers() const { 3362 return getLocalCVRQualifiers() | 3363 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3364} 3365 3366/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3367/// type, returns them. Otherwise, if this is an array type, recurses 3368/// on the element type until some qualifiers have been found or a non-array 3369/// type reached. 3370inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3371 if (unsigned Quals = getCVRQualifiers()) 3372 return Quals; 3373 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3374 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3375 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3376 return 0; 3377} 3378 3379inline void QualType::removeConst() { 3380 removeFastQualifiers(Qualifiers::Const); 3381} 3382 3383inline void QualType::removeRestrict() { 3384 removeFastQualifiers(Qualifiers::Restrict); 3385} 3386 3387inline void QualType::removeVolatile() { 3388 QualifierCollector Qc; 3389 const Type *Ty = Qc.strip(*this); 3390 if (Qc.hasVolatile()) { 3391 Qc.removeVolatile(); 3392 *this = Qc.apply(Ty); 3393 } 3394} 3395 3396inline void QualType::removeCVRQualifiers(unsigned Mask) { 3397 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3398 3399 // Fast path: we don't need to touch the slow qualifiers. 3400 if (!(Mask & ~Qualifiers::FastMask)) { 3401 removeFastQualifiers(Mask); 3402 return; 3403 } 3404 3405 QualifierCollector Qc; 3406 const Type *Ty = Qc.strip(*this); 3407 Qc.removeCVRQualifiers(Mask); 3408 *this = Qc.apply(Ty); 3409} 3410 3411/// getAddressSpace - Return the address space of this type. 3412inline unsigned QualType::getAddressSpace() const { 3413 if (hasLocalNonFastQualifiers()) { 3414 const ExtQuals *EQ = getExtQualsUnsafe(); 3415 if (EQ->hasAddressSpace()) 3416 return EQ->getAddressSpace(); 3417 } 3418 3419 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3420 if (CT.hasLocalNonFastQualifiers()) { 3421 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3422 if (EQ->hasAddressSpace()) 3423 return EQ->getAddressSpace(); 3424 } 3425 3426 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3427 return AT->getElementType().getAddressSpace(); 3428 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3429 return RT->getAddressSpace(); 3430 return 0; 3431} 3432 3433/// getObjCGCAttr - Return the gc attribute of this type. 3434inline Qualifiers::GC QualType::getObjCGCAttr() const { 3435 if (hasLocalNonFastQualifiers()) { 3436 const ExtQuals *EQ = getExtQualsUnsafe(); 3437 if (EQ->hasObjCGCAttr()) 3438 return EQ->getObjCGCAttr(); 3439 } 3440 3441 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3442 if (CT.hasLocalNonFastQualifiers()) { 3443 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3444 if (EQ->hasObjCGCAttr()) 3445 return EQ->getObjCGCAttr(); 3446 } 3447 3448 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3449 return AT->getElementType().getObjCGCAttr(); 3450 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3451 return PT->getPointeeType().getObjCGCAttr(); 3452 // We most look at all pointer types, not just pointer to interface types. 3453 if (const PointerType *PT = CT->getAs<PointerType>()) 3454 return PT->getPointeeType().getObjCGCAttr(); 3455 return Qualifiers::GCNone; 3456} 3457 3458inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3459 if (const PointerType *PT = t.getAs<PointerType>()) { 3460 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3461 return FT->getExtInfo(); 3462 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3463 return FT->getExtInfo(); 3464 3465 return FunctionType::ExtInfo(); 3466} 3467 3468inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3469 return getFunctionExtInfo(*t); 3470} 3471 3472/// \brief Determine whether this set of qualifiers is a superset of the given 3473/// set of qualifiers. 3474inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3475 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3476} 3477 3478/// isMoreQualifiedThan - Determine whether this type is more 3479/// qualified than the Other type. For example, "const volatile int" 3480/// is more qualified than "const int", "volatile int", and 3481/// "int". However, it is not more qualified than "const volatile 3482/// int". 3483inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3484 // FIXME: work on arbitrary qualifiers 3485 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3486 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3487 if (getAddressSpace() != Other.getAddressSpace()) 3488 return false; 3489 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3490} 3491 3492/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3493/// as qualified as the Other type. For example, "const volatile 3494/// int" is at least as qualified as "const int", "volatile int", 3495/// "int", and "const volatile int". 3496inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3497 // FIXME: work on arbitrary qualifiers 3498 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3499 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3500 if (getAddressSpace() != Other.getAddressSpace()) 3501 return false; 3502 return (MyQuals | OtherQuals) == MyQuals; 3503} 3504 3505/// getNonReferenceType - If Type is a reference type (e.g., const 3506/// int&), returns the type that the reference refers to ("const 3507/// int"). Otherwise, returns the type itself. This routine is used 3508/// throughout Sema to implement C++ 5p6: 3509/// 3510/// If an expression initially has the type "reference to T" (8.3.2, 3511/// 8.5.3), the type is adjusted to "T" prior to any further 3512/// analysis, the expression designates the object or function 3513/// denoted by the reference, and the expression is an lvalue. 3514inline QualType QualType::getNonReferenceType() const { 3515 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3516 return RefType->getPointeeType(); 3517 else 3518 return *this; 3519} 3520 3521inline bool Type::isFunctionType() const { 3522 return isa<FunctionType>(CanonicalType); 3523} 3524inline bool Type::isPointerType() const { 3525 return isa<PointerType>(CanonicalType); 3526} 3527inline bool Type::isAnyPointerType() const { 3528 return isPointerType() || isObjCObjectPointerType(); 3529} 3530inline bool Type::isBlockPointerType() const { 3531 return isa<BlockPointerType>(CanonicalType); 3532} 3533inline bool Type::isReferenceType() const { 3534 return isa<ReferenceType>(CanonicalType); 3535} 3536inline bool Type::isLValueReferenceType() const { 3537 return isa<LValueReferenceType>(CanonicalType); 3538} 3539inline bool Type::isRValueReferenceType() const { 3540 return isa<RValueReferenceType>(CanonicalType); 3541} 3542inline bool Type::isFunctionPointerType() const { 3543 if (const PointerType* T = getAs<PointerType>()) 3544 return T->getPointeeType()->isFunctionType(); 3545 else 3546 return false; 3547} 3548inline bool Type::isMemberPointerType() const { 3549 return isa<MemberPointerType>(CanonicalType); 3550} 3551inline bool Type::isMemberFunctionPointerType() const { 3552 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3553 return T->isMemberFunctionPointer(); 3554 else 3555 return false; 3556} 3557inline bool Type::isMemberDataPointerType() const { 3558 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3559 return T->isMemberDataPointer(); 3560 else 3561 return false; 3562} 3563inline bool Type::isArrayType() const { 3564 return isa<ArrayType>(CanonicalType); 3565} 3566inline bool Type::isConstantArrayType() const { 3567 return isa<ConstantArrayType>(CanonicalType); 3568} 3569inline bool Type::isIncompleteArrayType() const { 3570 return isa<IncompleteArrayType>(CanonicalType); 3571} 3572inline bool Type::isVariableArrayType() const { 3573 return isa<VariableArrayType>(CanonicalType); 3574} 3575inline bool Type::isDependentSizedArrayType() const { 3576 return isa<DependentSizedArrayType>(CanonicalType); 3577} 3578inline bool Type::isBuiltinType() const { 3579 return isa<BuiltinType>(CanonicalType); 3580} 3581inline bool Type::isRecordType() const { 3582 return isa<RecordType>(CanonicalType); 3583} 3584inline bool Type::isEnumeralType() const { 3585 return isa<EnumType>(CanonicalType); 3586} 3587inline bool Type::isAnyComplexType() const { 3588 return isa<ComplexType>(CanonicalType); 3589} 3590inline bool Type::isVectorType() const { 3591 return isa<VectorType>(CanonicalType); 3592} 3593inline bool Type::isExtVectorType() const { 3594 return isa<ExtVectorType>(CanonicalType); 3595} 3596inline bool Type::isObjCObjectPointerType() const { 3597 return isa<ObjCObjectPointerType>(CanonicalType); 3598} 3599inline bool Type::isObjCObjectType() const { 3600 return isa<ObjCObjectType>(CanonicalType); 3601} 3602inline bool Type::isObjCObjectOrInterfaceType() const { 3603 return isa<ObjCInterfaceType>(CanonicalType) || 3604 isa<ObjCObjectType>(CanonicalType); 3605} 3606 3607inline bool Type::isObjCQualifiedIdType() const { 3608 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3609 return OPT->isObjCQualifiedIdType(); 3610 return false; 3611} 3612inline bool Type::isObjCQualifiedClassType() const { 3613 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3614 return OPT->isObjCQualifiedClassType(); 3615 return false; 3616} 3617inline bool Type::isObjCIdType() const { 3618 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3619 return OPT->isObjCIdType(); 3620 return false; 3621} 3622inline bool Type::isObjCClassType() const { 3623 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3624 return OPT->isObjCClassType(); 3625 return false; 3626} 3627inline bool Type::isObjCSelType() const { 3628 if (const PointerType *OPT = getAs<PointerType>()) 3629 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3630 return false; 3631} 3632inline bool Type::isObjCBuiltinType() const { 3633 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3634} 3635inline bool Type::isTemplateTypeParmType() const { 3636 return isa<TemplateTypeParmType>(CanonicalType); 3637} 3638 3639inline bool Type::isSpecificBuiltinType(unsigned K) const { 3640 if (const BuiltinType *BT = getAs<BuiltinType>()) 3641 if (BT->getKind() == (BuiltinType::Kind) K) 3642 return true; 3643 return false; 3644} 3645 3646inline bool Type::isPlaceholderType() const { 3647 if (const BuiltinType *BT = getAs<BuiltinType>()) 3648 return BT->isPlaceholderType(); 3649 return false; 3650} 3651 3652/// \brief Determines whether this is a type for which one can define 3653/// an overloaded operator. 3654inline bool Type::isOverloadableType() const { 3655 return isDependentType() || isRecordType() || isEnumeralType(); 3656} 3657 3658inline bool Type::hasPointerRepresentation() const { 3659 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3660 isObjCObjectPointerType() || isNullPtrType()); 3661} 3662 3663inline bool Type::hasObjCPointerRepresentation() const { 3664 return isObjCObjectPointerType(); 3665} 3666 3667/// Insertion operator for diagnostics. This allows sending QualType's into a 3668/// diagnostic with <<. 3669inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3670 QualType T) { 3671 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3672 Diagnostic::ak_qualtype); 3673 return DB; 3674} 3675 3676/// Insertion operator for partial diagnostics. This allows sending QualType's 3677/// into a diagnostic with <<. 3678inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3679 QualType T) { 3680 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3681 Diagnostic::ak_qualtype); 3682 return PD; 3683} 3684 3685// Helper class template that is used by Type::getAs to ensure that one does 3686// not try to look through a qualified type to get to an array type. 3687template<typename T, 3688 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3689 llvm::is_base_of<ArrayType, T>::value)> 3690struct ArrayType_cannot_be_used_with_getAs { }; 3691 3692template<typename T> 3693struct ArrayType_cannot_be_used_with_getAs<T, true>; 3694 3695/// Member-template getAs<specific type>'. 3696template <typename T> const T *Type::getAs() const { 3697 ArrayType_cannot_be_used_with_getAs<T> at; 3698 (void)at; 3699 3700 // If this is directly a T type, return it. 3701 if (const T *Ty = dyn_cast<T>(this)) 3702 return Ty; 3703 3704 // If the canonical form of this type isn't the right kind, reject it. 3705 if (!isa<T>(CanonicalType)) 3706 return 0; 3707 3708 // If this is a typedef for the type, strip the typedef off without 3709 // losing all typedef information. 3710 return cast<T>(getUnqualifiedDesugaredType()); 3711} 3712 3713} // end namespace clang 3714 3715#endif 3716