Type.h revision 61d0b6baf47cf411f6c0f6ddb4acffcfeec724f1
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/ExceptionSpecificationType.h" 19#include "clang/Basic/IdentifierTable.h" 20#include "clang/Basic/Linkage.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/Visibility.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/TemplateName.h" 25#include "llvm/Support/Casting.h" 26#include "llvm/Support/type_traits.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32 33using llvm::isa; 34using llvm::cast; 35using llvm::cast_or_null; 36using llvm::dyn_cast; 37using llvm::dyn_cast_or_null; 38namespace clang { 39 enum { 40 TypeAlignmentInBits = 4, 41 TypeAlignment = 1 << TypeAlignmentInBits 42 }; 43 class Type; 44 class ExtQuals; 45 class QualType; 46} 47 48namespace llvm { 49 template <typename T> 50 class PointerLikeTypeTraits; 51 template<> 52 class PointerLikeTypeTraits< ::clang::Type*> { 53 public: 54 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 55 static inline ::clang::Type *getFromVoidPointer(void *P) { 56 return static_cast< ::clang::Type*>(P); 57 } 58 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 59 }; 60 template<> 61 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 62 public: 63 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 64 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 65 return static_cast< ::clang::ExtQuals*>(P); 66 } 67 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 68 }; 69 70 template <> 71 struct isPodLike<clang::QualType> { static const bool value = true; }; 72} 73 74namespace clang { 75 class ASTContext; 76 class TypedefNameDecl; 77 class TemplateDecl; 78 class TemplateTypeParmDecl; 79 class NonTypeTemplateParmDecl; 80 class TemplateTemplateParmDecl; 81 class TagDecl; 82 class RecordDecl; 83 class CXXRecordDecl; 84 class EnumDecl; 85 class FieldDecl; 86 class ObjCInterfaceDecl; 87 class ObjCProtocolDecl; 88 class ObjCMethodDecl; 89 class UnresolvedUsingTypenameDecl; 90 class Expr; 91 class Stmt; 92 class SourceLocation; 93 class StmtIteratorBase; 94 class TemplateArgument; 95 class TemplateArgumentLoc; 96 class TemplateArgumentListInfo; 97 class ElaboratedType; 98 class ExtQuals; 99 class ExtQualsTypeCommonBase; 100 struct PrintingPolicy; 101 102 template <typename> class CanQual; 103 typedef CanQual<Type> CanQualType; 104 105 // Provide forward declarations for all of the *Type classes 106#define TYPE(Class, Base) class Class##Type; 107#include "clang/AST/TypeNodes.def" 108 109/// Qualifiers - The collection of all-type qualifiers we support. 110/// Clang supports five independent qualifiers: 111/// * C99: const, volatile, and restrict 112/// * Embedded C (TR18037): address spaces 113/// * Objective C: the GC attributes (none, weak, or strong) 114class Qualifiers { 115public: 116 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 117 Const = 0x1, 118 Restrict = 0x2, 119 Volatile = 0x4, 120 CVRMask = Const | Volatile | Restrict 121 }; 122 123 enum GC { 124 GCNone = 0, 125 Weak, 126 Strong 127 }; 128 129 enum { 130 /// The maximum supported address space number. 131 /// 24 bits should be enough for anyone. 132 MaxAddressSpace = 0xffffffu, 133 134 /// The width of the "fast" qualifier mask. 135 FastWidth = 3, 136 137 /// The fast qualifier mask. 138 FastMask = (1 << FastWidth) - 1 139 }; 140 141 Qualifiers() : Mask(0) {} 142 143 static Qualifiers fromFastMask(unsigned Mask) { 144 Qualifiers Qs; 145 Qs.addFastQualifiers(Mask); 146 return Qs; 147 } 148 149 static Qualifiers fromCVRMask(unsigned CVR) { 150 Qualifiers Qs; 151 Qs.addCVRQualifiers(CVR); 152 return Qs; 153 } 154 155 // Deserialize qualifiers from an opaque representation. 156 static Qualifiers fromOpaqueValue(unsigned opaque) { 157 Qualifiers Qs; 158 Qs.Mask = opaque; 159 return Qs; 160 } 161 162 // Serialize these qualifiers into an opaque representation. 163 unsigned getAsOpaqueValue() const { 164 return Mask; 165 } 166 167 bool hasConst() const { return Mask & Const; } 168 void setConst(bool flag) { 169 Mask = (Mask & ~Const) | (flag ? Const : 0); 170 } 171 void removeConst() { Mask &= ~Const; } 172 void addConst() { Mask |= Const; } 173 174 bool hasVolatile() const { return Mask & Volatile; } 175 void setVolatile(bool flag) { 176 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 177 } 178 void removeVolatile() { Mask &= ~Volatile; } 179 void addVolatile() { Mask |= Volatile; } 180 181 bool hasRestrict() const { return Mask & Restrict; } 182 void setRestrict(bool flag) { 183 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 184 } 185 void removeRestrict() { Mask &= ~Restrict; } 186 void addRestrict() { Mask |= Restrict; } 187 188 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 189 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 190 void setCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask = (Mask & ~CVRMask) | mask; 193 } 194 void removeCVRQualifiers(unsigned mask) { 195 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 196 Mask &= ~mask; 197 } 198 void removeCVRQualifiers() { 199 removeCVRQualifiers(CVRMask); 200 } 201 void addCVRQualifiers(unsigned mask) { 202 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 203 Mask |= mask; 204 } 205 206 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 207 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 208 void setObjCGCAttr(GC type) { 209 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 210 } 211 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 212 void addObjCGCAttr(GC type) { 213 assert(type); 214 setObjCGCAttr(type); 215 } 216 Qualifiers withoutObjCGCAttr() const { 217 Qualifiers qs = *this; 218 qs.removeObjCGCAttr(); 219 return qs; 220 } 221 222 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 223 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 224 void setAddressSpace(unsigned space) { 225 assert(space <= MaxAddressSpace); 226 Mask = (Mask & ~AddressSpaceMask) 227 | (((uint32_t) space) << AddressSpaceShift); 228 } 229 void removeAddressSpace() { setAddressSpace(0); } 230 void addAddressSpace(unsigned space) { 231 assert(space); 232 setAddressSpace(space); 233 } 234 235 // Fast qualifiers are those that can be allocated directly 236 // on a QualType object. 237 bool hasFastQualifiers() const { return getFastQualifiers(); } 238 unsigned getFastQualifiers() const { return Mask & FastMask; } 239 void setFastQualifiers(unsigned mask) { 240 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 241 Mask = (Mask & ~FastMask) | mask; 242 } 243 void removeFastQualifiers(unsigned mask) { 244 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 245 Mask &= ~mask; 246 } 247 void removeFastQualifiers() { 248 removeFastQualifiers(FastMask); 249 } 250 void addFastQualifiers(unsigned mask) { 251 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 252 Mask |= mask; 253 } 254 255 /// hasNonFastQualifiers - Return true if the set contains any 256 /// qualifiers which require an ExtQuals node to be allocated. 257 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 258 Qualifiers getNonFastQualifiers() const { 259 Qualifiers Quals = *this; 260 Quals.setFastQualifiers(0); 261 return Quals; 262 } 263 264 /// hasQualifiers - Return true if the set contains any qualifiers. 265 bool hasQualifiers() const { return Mask; } 266 bool empty() const { return !Mask; } 267 268 /// \brief Add the qualifiers from the given set to this set. 269 void addQualifiers(Qualifiers Q) { 270 // If the other set doesn't have any non-boolean qualifiers, just 271 // bit-or it in. 272 if (!(Q.Mask & ~CVRMask)) 273 Mask |= Q.Mask; 274 else { 275 Mask |= (Q.Mask & CVRMask); 276 if (Q.hasAddressSpace()) 277 addAddressSpace(Q.getAddressSpace()); 278 if (Q.hasObjCGCAttr()) 279 addObjCGCAttr(Q.getObjCGCAttr()); 280 } 281 } 282 283 /// \brief Add the qualifiers from the given set to this set, given that 284 /// they don't conflict. 285 void addConsistentQualifiers(Qualifiers qs) { 286 assert(getAddressSpace() == qs.getAddressSpace() || 287 !hasAddressSpace() || !qs.hasAddressSpace()); 288 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 289 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 290 Mask |= qs.Mask; 291 } 292 293 /// \brief Determines if these qualifiers compatibly include another set. 294 /// Generally this answers the question of whether an object with the other 295 /// qualifiers can be safely used as an object with these qualifiers. 296 bool compatiblyIncludes(Qualifiers other) const { 297 // Non-CVR qualifiers must match exactly. CVR qualifiers may subset. 298 return ((Mask & ~CVRMask) == (other.Mask & ~CVRMask)) && 299 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 300 } 301 302 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 303 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 304 305 operator bool() const { return hasQualifiers(); } 306 307 Qualifiers &operator+=(Qualifiers R) { 308 addQualifiers(R); 309 return *this; 310 } 311 312 // Union two qualifier sets. If an enumerated qualifier appears 313 // in both sets, use the one from the right. 314 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 315 L += R; 316 return L; 317 } 318 319 Qualifiers &operator-=(Qualifiers R) { 320 Mask = Mask & ~(R.Mask); 321 return *this; 322 } 323 324 /// \brief Compute the difference between two qualifier sets. 325 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 326 L -= R; 327 return L; 328 } 329 330 std::string getAsString() const; 331 std::string getAsString(const PrintingPolicy &Policy) const { 332 std::string Buffer; 333 getAsStringInternal(Buffer, Policy); 334 return Buffer; 335 } 336 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 337 338 void Profile(llvm::FoldingSetNodeID &ID) const { 339 ID.AddInteger(Mask); 340 } 341 342private: 343 344 // bits: |0 1 2|3 .. 4|5 .. 31| 345 // |C R V|GCAttr|AddrSpace| 346 uint32_t Mask; 347 348 static const uint32_t GCAttrMask = 0x18; 349 static const uint32_t GCAttrShift = 3; 350 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 351 static const uint32_t AddressSpaceShift = 5; 352}; 353 354/// CallingConv - Specifies the calling convention that a function uses. 355enum CallingConv { 356 CC_Default, 357 CC_C, // __attribute__((cdecl)) 358 CC_X86StdCall, // __attribute__((stdcall)) 359 CC_X86FastCall, // __attribute__((fastcall)) 360 CC_X86ThisCall, // __attribute__((thiscall)) 361 CC_X86Pascal, // __attribute__((pascal)) 362 CC_AAPCS, // __attribute__((pcs("aapcs"))) 363 CC_AAPCS_VFP // __attribute__((pcs("aapcs-vfp"))) 364}; 365 366typedef std::pair<const Type*, Qualifiers> SplitQualType; 367 368/// QualType - For efficiency, we don't store CV-qualified types as nodes on 369/// their own: instead each reference to a type stores the qualifiers. This 370/// greatly reduces the number of nodes we need to allocate for types (for 371/// example we only need one for 'int', 'const int', 'volatile int', 372/// 'const volatile int', etc). 373/// 374/// As an added efficiency bonus, instead of making this a pair, we 375/// just store the two bits we care about in the low bits of the 376/// pointer. To handle the packing/unpacking, we make QualType be a 377/// simple wrapper class that acts like a smart pointer. A third bit 378/// indicates whether there are extended qualifiers present, in which 379/// case the pointer points to a special structure. 380class QualType { 381 // Thankfully, these are efficiently composable. 382 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 383 Qualifiers::FastWidth> Value; 384 385 const ExtQuals *getExtQualsUnsafe() const { 386 return Value.getPointer().get<const ExtQuals*>(); 387 } 388 389 const Type *getTypePtrUnsafe() const { 390 return Value.getPointer().get<const Type*>(); 391 } 392 393 const ExtQualsTypeCommonBase *getCommonPtr() const { 394 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 395 uintptr_t CommonPtrVal 396 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 397 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 398 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 399 } 400 401 friend class QualifierCollector; 402public: 403 QualType() {} 404 405 QualType(const Type *Ptr, unsigned Quals) 406 : Value(Ptr, Quals) {} 407 QualType(const ExtQuals *Ptr, unsigned Quals) 408 : Value(Ptr, Quals) {} 409 410 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 411 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 412 413 /// Retrieves a pointer to the underlying (unqualified) type. 414 /// This should really return a const Type, but it's not worth 415 /// changing all the users right now. 416 /// 417 /// This function requires that the type not be NULL. If the type might be 418 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 419 const Type *getTypePtr() const; 420 421 const Type *getTypePtrOrNull() const; 422 423 /// Divides a QualType into its unqualified type and a set of local 424 /// qualifiers. 425 SplitQualType split() const; 426 427 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 428 static QualType getFromOpaquePtr(const void *Ptr) { 429 QualType T; 430 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 431 return T; 432 } 433 434 const Type &operator*() const { 435 return *getTypePtr(); 436 } 437 438 const Type *operator->() const { 439 return getTypePtr(); 440 } 441 442 bool isCanonical() const; 443 bool isCanonicalAsParam() const; 444 445 /// isNull - Return true if this QualType doesn't point to a type yet. 446 bool isNull() const { 447 return Value.getPointer().isNull(); 448 } 449 450 /// \brief Determine whether this particular QualType instance has the 451 /// "const" qualifier set, without looking through typedefs that may have 452 /// added "const" at a different level. 453 bool isLocalConstQualified() const { 454 return (getLocalFastQualifiers() & Qualifiers::Const); 455 } 456 457 /// \brief Determine whether this type is const-qualified. 458 bool isConstQualified() const; 459 460 /// \brief Determine whether this particular QualType instance has the 461 /// "restrict" qualifier set, without looking through typedefs that may have 462 /// added "restrict" at a different level. 463 bool isLocalRestrictQualified() const { 464 return (getLocalFastQualifiers() & Qualifiers::Restrict); 465 } 466 467 /// \brief Determine whether this type is restrict-qualified. 468 bool isRestrictQualified() const; 469 470 /// \brief Determine whether this particular QualType instance has the 471 /// "volatile" qualifier set, without looking through typedefs that may have 472 /// added "volatile" at a different level. 473 bool isLocalVolatileQualified() const { 474 return (getLocalFastQualifiers() & Qualifiers::Volatile); 475 } 476 477 /// \brief Determine whether this type is volatile-qualified. 478 bool isVolatileQualified() const; 479 480 /// \brief Determine whether this particular QualType instance has any 481 /// qualifiers, without looking through any typedefs that might add 482 /// qualifiers at a different level. 483 bool hasLocalQualifiers() const { 484 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 485 } 486 487 /// \brief Determine whether this type has any qualifiers. 488 bool hasQualifiers() const; 489 490 /// \brief Determine whether this particular QualType instance has any 491 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 492 /// instance. 493 bool hasLocalNonFastQualifiers() const { 494 return Value.getPointer().is<const ExtQuals*>(); 495 } 496 497 /// \brief Retrieve the set of qualifiers local to this particular QualType 498 /// instance, not including any qualifiers acquired through typedefs or 499 /// other sugar. 500 Qualifiers getLocalQualifiers() const; 501 502 /// \brief Retrieve the set of qualifiers applied to this type. 503 Qualifiers getQualifiers() const; 504 505 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 506 /// local to this particular QualType instance, not including any qualifiers 507 /// acquired through typedefs or other sugar. 508 unsigned getLocalCVRQualifiers() const { 509 return getLocalFastQualifiers(); 510 } 511 512 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 513 /// applied to this type. 514 unsigned getCVRQualifiers() const; 515 516 bool isConstant(ASTContext& Ctx) const { 517 return QualType::isConstant(*this, Ctx); 518 } 519 520 // Don't promise in the API that anything besides 'const' can be 521 // easily added. 522 523 /// addConst - add the specified type qualifier to this QualType. 524 void addConst() { 525 addFastQualifiers(Qualifiers::Const); 526 } 527 QualType withConst() const { 528 return withFastQualifiers(Qualifiers::Const); 529 } 530 531 void addFastQualifiers(unsigned TQs) { 532 assert(!(TQs & ~Qualifiers::FastMask) 533 && "non-fast qualifier bits set in mask!"); 534 Value.setInt(Value.getInt() | TQs); 535 } 536 537 void removeLocalConst(); 538 void removeLocalVolatile(); 539 void removeLocalRestrict(); 540 void removeLocalCVRQualifiers(unsigned Mask); 541 542 void removeLocalFastQualifiers() { Value.setInt(0); } 543 void removeLocalFastQualifiers(unsigned Mask) { 544 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 545 Value.setInt(Value.getInt() & ~Mask); 546 } 547 548 // Creates a type with the given qualifiers in addition to any 549 // qualifiers already on this type. 550 QualType withFastQualifiers(unsigned TQs) const { 551 QualType T = *this; 552 T.addFastQualifiers(TQs); 553 return T; 554 } 555 556 // Creates a type with exactly the given fast qualifiers, removing 557 // any existing fast qualifiers. 558 QualType withExactLocalFastQualifiers(unsigned TQs) const { 559 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 560 } 561 562 // Removes fast qualifiers, but leaves any extended qualifiers in place. 563 QualType withoutLocalFastQualifiers() const { 564 QualType T = *this; 565 T.removeLocalFastQualifiers(); 566 return T; 567 } 568 569 QualType getCanonicalType() const; 570 571 /// \brief Return this type with all of the instance-specific qualifiers 572 /// removed, but without removing any qualifiers that may have been applied 573 /// through typedefs. 574 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 575 576 /// \brief Retrieve the unqualified variant of the given type, 577 /// removing as little sugar as possible. 578 /// 579 /// This routine looks through various kinds of sugar to find the 580 /// least-desugared type that is unqualified. For example, given: 581 /// 582 /// \code 583 /// typedef int Integer; 584 /// typedef const Integer CInteger; 585 /// typedef CInteger DifferenceType; 586 /// \endcode 587 /// 588 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 589 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 590 /// 591 /// The resulting type might still be qualified if it's an array 592 /// type. To strip qualifiers even from within an array type, use 593 /// ASTContext::getUnqualifiedArrayType. 594 inline QualType getUnqualifiedType() const; 595 596 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 597 /// given type, removing as little sugar as possible. 598 /// 599 /// Like getUnqualifiedType(), but also returns the set of 600 /// qualifiers that were built up. 601 /// 602 /// The resulting type might still be qualified if it's an array 603 /// type. To strip qualifiers even from within an array type, use 604 /// ASTContext::getUnqualifiedArrayType. 605 inline SplitQualType getSplitUnqualifiedType() const; 606 607 /// \brief Determine whether this type is more qualified than the other 608 /// given type, requiring exact equality for non-CVR qualifiers. 609 bool isMoreQualifiedThan(QualType Other) const; 610 611 /// \brief Determine whether this type is at least as qualified as the other 612 /// given type, requiring exact equality for non-CVR qualifiers. 613 bool isAtLeastAsQualifiedAs(QualType Other) const; 614 615 QualType getNonReferenceType() const; 616 617 /// \brief Determine the type of a (typically non-lvalue) expression with the 618 /// specified result type. 619 /// 620 /// This routine should be used for expressions for which the return type is 621 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 622 /// an lvalue. It removes a top-level reference (since there are no 623 /// expressions of reference type) and deletes top-level cvr-qualifiers 624 /// from non-class types (in C++) or all types (in C). 625 QualType getNonLValueExprType(ASTContext &Context) const; 626 627 /// getDesugaredType - Return the specified type with any "sugar" removed from 628 /// the type. This takes off typedefs, typeof's etc. If the outer level of 629 /// the type is already concrete, it returns it unmodified. This is similar 630 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 631 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 632 /// concrete. 633 /// 634 /// Qualifiers are left in place. 635 QualType getDesugaredType(const ASTContext &Context) const { 636 return getDesugaredType(*this, Context); 637 } 638 639 SplitQualType getSplitDesugaredType() const { 640 return getSplitDesugaredType(*this); 641 } 642 643 /// IgnoreParens - Returns the specified type after dropping any 644 /// outer-level parentheses. 645 QualType IgnoreParens() const { 646 if (isa<ParenType>(*this)) 647 return QualType::IgnoreParens(*this); 648 return *this; 649 } 650 651 /// operator==/!= - Indicate whether the specified types and qualifiers are 652 /// identical. 653 friend bool operator==(const QualType &LHS, const QualType &RHS) { 654 return LHS.Value == RHS.Value; 655 } 656 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 657 return LHS.Value != RHS.Value; 658 } 659 std::string getAsString() const { 660 return getAsString(split()); 661 } 662 static std::string getAsString(SplitQualType split) { 663 return getAsString(split.first, split.second); 664 } 665 static std::string getAsString(const Type *ty, Qualifiers qs); 666 667 std::string getAsString(const PrintingPolicy &Policy) const { 668 std::string S; 669 getAsStringInternal(S, Policy); 670 return S; 671 } 672 void getAsStringInternal(std::string &Str, 673 const PrintingPolicy &Policy) const { 674 return getAsStringInternal(split(), Str, Policy); 675 } 676 static void getAsStringInternal(SplitQualType split, std::string &out, 677 const PrintingPolicy &policy) { 678 return getAsStringInternal(split.first, split.second, out, policy); 679 } 680 static void getAsStringInternal(const Type *ty, Qualifiers qs, 681 std::string &out, 682 const PrintingPolicy &policy); 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 } 706 707 enum DestructionKind { 708 DK_none, 709 DK_cxx_destructor 710 }; 711 712 /// isDestructedType - nonzero if objects of this type require 713 /// non-trivial work to clean up after. Non-zero because it's 714 /// conceivable that qualifiers (objc_gc(weak)?) could make 715 /// something require destruction. 716 DestructionKind isDestructedType() const { 717 return isDestructedTypeImpl(*this); 718 } 719 720private: 721 // These methods are implemented in a separate translation unit; 722 // "static"-ize them to avoid creating temporary QualTypes in the 723 // caller. 724 static bool isConstant(QualType T, ASTContext& Ctx); 725 static QualType getDesugaredType(QualType T, const ASTContext &Context); 726 static SplitQualType getSplitDesugaredType(QualType T); 727 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 728 static QualType IgnoreParens(QualType T); 729 static DestructionKind isDestructedTypeImpl(QualType type); 730}; 731 732} // end clang. 733 734namespace llvm { 735/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 736/// to a specific Type class. 737template<> struct simplify_type<const ::clang::QualType> { 738 typedef const ::clang::Type *SimpleType; 739 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 740 return Val.getTypePtr(); 741 } 742}; 743template<> struct simplify_type< ::clang::QualType> 744 : public simplify_type<const ::clang::QualType> {}; 745 746// Teach SmallPtrSet that QualType is "basically a pointer". 747template<> 748class PointerLikeTypeTraits<clang::QualType> { 749public: 750 static inline void *getAsVoidPointer(clang::QualType P) { 751 return P.getAsOpaquePtr(); 752 } 753 static inline clang::QualType getFromVoidPointer(void *P) { 754 return clang::QualType::getFromOpaquePtr(P); 755 } 756 // Various qualifiers go in low bits. 757 enum { NumLowBitsAvailable = 0 }; 758}; 759 760} // end namespace llvm 761 762namespace clang { 763 764/// \brief Base class that is common to both the \c ExtQuals and \c Type 765/// classes, which allows \c QualType to access the common fields between the 766/// two. 767/// 768class ExtQualsTypeCommonBase { 769 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 770 : BaseType(baseType), CanonicalType(canon) {} 771 772 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 773 /// a self-referential pointer (for \c Type). 774 /// 775 /// This pointer allows an efficient mapping from a QualType to its 776 /// underlying type pointer. 777 const Type *const BaseType; 778 779 /// \brief The canonical type of this type. A QualType. 780 QualType CanonicalType; 781 782 friend class QualType; 783 friend class Type; 784 friend class ExtQuals; 785}; 786 787/// ExtQuals - We can encode up to four bits in the low bits of a 788/// type pointer, but there are many more type qualifiers that we want 789/// to be able to apply to an arbitrary type. Therefore we have this 790/// struct, intended to be heap-allocated and used by QualType to 791/// store qualifiers. 792/// 793/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 794/// in three low bits on the QualType pointer; a fourth bit records whether 795/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 796/// Objective-C GC attributes) are much more rare. 797class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 798 // NOTE: changing the fast qualifiers should be straightforward as 799 // long as you don't make 'const' non-fast. 800 // 1. Qualifiers: 801 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 802 // Fast qualifiers must occupy the low-order bits. 803 // b) Update Qualifiers::FastWidth and FastMask. 804 // 2. QualType: 805 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 806 // b) Update remove{Volatile,Restrict}, defined near the end of 807 // this header. 808 // 3. ASTContext: 809 // a) Update get{Volatile,Restrict}Type. 810 811 /// Quals - the immutable set of qualifiers applied by this 812 /// node; always contains extended qualifiers. 813 Qualifiers Quals; 814 815 ExtQuals *this_() { return this; } 816 817public: 818 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 819 : ExtQualsTypeCommonBase(baseType, 820 canon.isNull() ? QualType(this_(), 0) : canon), 821 Quals(quals) 822 { 823 assert(Quals.hasNonFastQualifiers() 824 && "ExtQuals created with no fast qualifiers"); 825 assert(!Quals.hasFastQualifiers() 826 && "ExtQuals created with fast qualifiers"); 827 } 828 829 Qualifiers getQualifiers() const { return Quals; } 830 831 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 832 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 833 834 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 835 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 836 837 const Type *getBaseType() const { return BaseType; } 838 839public: 840 void Profile(llvm::FoldingSetNodeID &ID) const { 841 Profile(ID, getBaseType(), Quals); 842 } 843 static void Profile(llvm::FoldingSetNodeID &ID, 844 const Type *BaseType, 845 Qualifiers Quals) { 846 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 847 ID.AddPointer(BaseType); 848 Quals.Profile(ID); 849 } 850}; 851 852/// \brief The kind of C++0x ref-qualifier associated with a function type, 853/// which determines whether a member function's "this" object can be an 854/// lvalue, rvalue, or neither. 855enum RefQualifierKind { 856 /// \brief No ref-qualifier was provided. 857 RQ_None = 0, 858 /// \brief An lvalue ref-qualifier was provided (\c &). 859 RQ_LValue, 860 /// \brief An rvalue ref-qualifier was provided (\c &&). 861 RQ_RValue 862}; 863 864/// Type - This is the base class of the type hierarchy. A central concept 865/// with types is that each type always has a canonical type. A canonical type 866/// is the type with any typedef names stripped out of it or the types it 867/// references. For example, consider: 868/// 869/// typedef int foo; 870/// typedef foo* bar; 871/// 'int *' 'foo *' 'bar' 872/// 873/// There will be a Type object created for 'int'. Since int is canonical, its 874/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 875/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 876/// there is a PointerType that represents 'int*', which, like 'int', is 877/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 878/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 879/// is also 'int*'. 880/// 881/// Non-canonical types are useful for emitting diagnostics, without losing 882/// information about typedefs being used. Canonical types are useful for type 883/// comparisons (they allow by-pointer equality tests) and useful for reasoning 884/// about whether something has a particular form (e.g. is a function type), 885/// because they implicitly, recursively, strip all typedefs out of a type. 886/// 887/// Types, once created, are immutable. 888/// 889class Type : public ExtQualsTypeCommonBase { 890public: 891 enum TypeClass { 892#define TYPE(Class, Base) Class, 893#define LAST_TYPE(Class) TypeLast = Class, 894#define ABSTRACT_TYPE(Class, Base) 895#include "clang/AST/TypeNodes.def" 896 TagFirst = Record, TagLast = Enum 897 }; 898 899private: 900 Type(const Type&); // DO NOT IMPLEMENT. 901 void operator=(const Type&); // DO NOT IMPLEMENT. 902 903 /// Bitfields required by the Type class. 904 class TypeBitfields { 905 friend class Type; 906 template <class T> friend class TypePropertyCache; 907 908 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 909 unsigned TC : 8; 910 911 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 912 /// Note that this should stay at the end of the ivars for Type so that 913 /// subclasses can pack their bitfields into the same word. 914 unsigned Dependent : 1; 915 916 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 917 unsigned VariablyModified : 1; 918 919 /// \brief Whether this type contains an unexpanded parameter pack 920 /// (for C++0x variadic templates). 921 unsigned ContainsUnexpandedParameterPack : 1; 922 923 /// \brief Nonzero if the cache (i.e. the bitfields here starting 924 /// with 'Cache') is valid. If so, then this is a 925 /// LangOptions::VisibilityMode+1. 926 mutable unsigned CacheValidAndVisibility : 2; 927 928 /// \brief Linkage of this type. 929 mutable unsigned CachedLinkage : 2; 930 931 /// \brief Whether this type involves and local or unnamed types. 932 mutable unsigned CachedLocalOrUnnamed : 1; 933 934 /// \brief FromAST - Whether this type comes from an AST file. 935 mutable unsigned FromAST : 1; 936 937 bool isCacheValid() const { 938 return (CacheValidAndVisibility != 0); 939 } 940 Visibility getVisibility() const { 941 assert(isCacheValid() && "getting linkage from invalid cache"); 942 return static_cast<Visibility>(CacheValidAndVisibility-1); 943 } 944 Linkage getLinkage() const { 945 assert(isCacheValid() && "getting linkage from invalid cache"); 946 return static_cast<Linkage>(CachedLinkage); 947 } 948 bool hasLocalOrUnnamedType() const { 949 assert(isCacheValid() && "getting linkage from invalid cache"); 950 return CachedLocalOrUnnamed; 951 } 952 }; 953 enum { NumTypeBits = 17 }; 954 955protected: 956 // These classes allow subclasses to somewhat cleanly pack bitfields 957 // into Type. 958 959 class ArrayTypeBitfields { 960 friend class ArrayType; 961 962 unsigned : NumTypeBits; 963 964 /// IndexTypeQuals - CVR qualifiers from declarations like 965 /// 'int X[static restrict 4]'. For function parameters only. 966 unsigned IndexTypeQuals : 3; 967 968 /// SizeModifier - storage class qualifiers from declarations like 969 /// 'int X[static restrict 4]'. For function parameters only. 970 /// Actually an ArrayType::ArraySizeModifier. 971 unsigned SizeModifier : 3; 972 }; 973 974 class BuiltinTypeBitfields { 975 friend class BuiltinType; 976 977 unsigned : NumTypeBits; 978 979 /// The kind (BuiltinType::Kind) of builtin type this is. 980 unsigned Kind : 8; 981 }; 982 983 class FunctionTypeBitfields { 984 friend class FunctionType; 985 986 unsigned : NumTypeBits; 987 988 /// Extra information which affects how the function is called, like 989 /// regparm and the calling convention. 990 unsigned ExtInfo : 8; 991 992 /// Whether the function is variadic. Only used by FunctionProtoType. 993 unsigned Variadic : 1; 994 995 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 996 /// other bitfields. 997 /// The qualifiers are part of FunctionProtoType because... 998 /// 999 /// C++ 8.3.5p4: The return type, the parameter type list and the 1000 /// cv-qualifier-seq, [...], are part of the function type. 1001 unsigned TypeQuals : 3; 1002 1003 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1004 /// 1005 /// This is a value of type \c RefQualifierKind. 1006 unsigned RefQualifier : 2; 1007 }; 1008 1009 class ObjCObjectTypeBitfields { 1010 friend class ObjCObjectType; 1011 1012 unsigned : NumTypeBits; 1013 1014 /// NumProtocols - The number of protocols stored directly on this 1015 /// object type. 1016 unsigned NumProtocols : 32 - NumTypeBits; 1017 }; 1018 1019 class ReferenceTypeBitfields { 1020 friend class ReferenceType; 1021 1022 unsigned : NumTypeBits; 1023 1024 /// True if the type was originally spelled with an lvalue sigil. 1025 /// This is never true of rvalue references but can also be false 1026 /// on lvalue references because of C++0x [dcl.typedef]p9, 1027 /// as follows: 1028 /// 1029 /// typedef int &ref; // lvalue, spelled lvalue 1030 /// typedef int &&rvref; // rvalue 1031 /// ref &a; // lvalue, inner ref, spelled lvalue 1032 /// ref &&a; // lvalue, inner ref 1033 /// rvref &a; // lvalue, inner ref, spelled lvalue 1034 /// rvref &&a; // rvalue, inner ref 1035 unsigned SpelledAsLValue : 1; 1036 1037 /// True if the inner type is a reference type. This only happens 1038 /// in non-canonical forms. 1039 unsigned InnerRef : 1; 1040 }; 1041 1042 class TypeWithKeywordBitfields { 1043 friend class TypeWithKeyword; 1044 1045 unsigned : NumTypeBits; 1046 1047 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1048 unsigned Keyword : 8; 1049 }; 1050 1051 class VectorTypeBitfields { 1052 friend class VectorType; 1053 1054 unsigned : NumTypeBits; 1055 1056 /// VecKind - The kind of vector, either a generic vector type or some 1057 /// target-specific vector type such as for AltiVec or Neon. 1058 unsigned VecKind : 3; 1059 1060 /// NumElements - The number of elements in the vector. 1061 unsigned NumElements : 29 - NumTypeBits; 1062 }; 1063 1064 class AttributedTypeBitfields { 1065 friend class AttributedType; 1066 1067 unsigned : NumTypeBits; 1068 1069 /// AttrKind - an AttributedType::Kind 1070 unsigned AttrKind : 32 - NumTypeBits; 1071 }; 1072 1073 union { 1074 TypeBitfields TypeBits; 1075 ArrayTypeBitfields ArrayTypeBits; 1076 AttributedTypeBitfields AttributedTypeBits; 1077 BuiltinTypeBitfields BuiltinTypeBits; 1078 FunctionTypeBitfields FunctionTypeBits; 1079 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1080 ReferenceTypeBitfields ReferenceTypeBits; 1081 TypeWithKeywordBitfields TypeWithKeywordBits; 1082 VectorTypeBitfields VectorTypeBits; 1083 }; 1084 1085private: 1086 /// \brief Set whether this type comes from an AST file. 1087 void setFromAST(bool V = true) const { 1088 TypeBits.FromAST = V; 1089 } 1090 1091 template <class T> friend class TypePropertyCache; 1092 1093protected: 1094 // silence VC++ warning C4355: 'this' : used in base member initializer list 1095 Type *this_() { return this; } 1096 Type(TypeClass tc, QualType canon, bool Dependent, bool VariablyModified, 1097 bool ContainsUnexpandedParameterPack) 1098 : ExtQualsTypeCommonBase(this, 1099 canon.isNull() ? QualType(this_(), 0) : canon) { 1100 TypeBits.TC = tc; 1101 TypeBits.Dependent = Dependent; 1102 TypeBits.VariablyModified = VariablyModified; 1103 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1104 TypeBits.CacheValidAndVisibility = 0; 1105 TypeBits.CachedLocalOrUnnamed = false; 1106 TypeBits.CachedLinkage = NoLinkage; 1107 TypeBits.FromAST = false; 1108 } 1109 friend class ASTContext; 1110 1111 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1112 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1113 void setContainsUnexpandedParameterPack(bool PP = true) { 1114 TypeBits.ContainsUnexpandedParameterPack = PP; 1115 } 1116 1117public: 1118 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1119 1120 /// \brief Whether this type comes from an AST file. 1121 bool isFromAST() const { return TypeBits.FromAST; } 1122 1123 /// \brief Whether this type is or contains an unexpanded parameter 1124 /// pack, used to support C++0x variadic templates. 1125 /// 1126 /// A type that contains a parameter pack shall be expanded by the 1127 /// ellipsis operator at some point. For example, the typedef in the 1128 /// following example contains an unexpanded parameter pack 'T': 1129 /// 1130 /// \code 1131 /// template<typename ...T> 1132 /// struct X { 1133 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1134 /// }; 1135 /// \endcode 1136 /// 1137 /// Note that this routine does not specify which 1138 bool containsUnexpandedParameterPack() const { 1139 return TypeBits.ContainsUnexpandedParameterPack; 1140 } 1141 1142 /// Determines if this type would be canonical if it had no further 1143 /// qualification. 1144 bool isCanonicalUnqualified() const { 1145 return CanonicalType == QualType(this, 0); 1146 } 1147 1148 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1149 /// object types, function types, and incomplete types. 1150 1151 /// isIncompleteType - Return true if this is an incomplete type. 1152 /// A type that can describe objects, but which lacks information needed to 1153 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1154 /// routine will need to determine if the size is actually required. 1155 bool isIncompleteType() const; 1156 1157 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1158 /// type, in other words, not a function type. 1159 bool isIncompleteOrObjectType() const { 1160 return !isFunctionType(); 1161 } 1162 1163 /// \brief Determine whether this type is an object type. 1164 bool isObjectType() const { 1165 // C++ [basic.types]p8: 1166 // An object type is a (possibly cv-qualified) type that is not a 1167 // function type, not a reference type, and not a void type. 1168 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1169 } 1170 1171 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1172 bool isPODType() const; 1173 1174 /// isLiteralType - Return true if this is a literal type 1175 /// (C++0x [basic.types]p10) 1176 bool isLiteralType() const; 1177 1178 /// isTrivialType - Return true if this is a trivial type 1179 /// (C++0x [basic.types]p9) 1180 bool isTrivialType() const; 1181 1182 /// Helper methods to distinguish type categories. All type predicates 1183 /// operate on the canonical type, ignoring typedefs and qualifiers. 1184 1185 /// isBuiltinType - returns true if the type is a builtin type. 1186 bool isBuiltinType() const; 1187 1188 /// isSpecificBuiltinType - Test for a particular builtin type. 1189 bool isSpecificBuiltinType(unsigned K) const; 1190 1191 /// isPlaceholderType - Test for a type which does not represent an 1192 /// actual type-system type but is instead used as a placeholder for 1193 /// various convenient purposes within Clang. All such types are 1194 /// BuiltinTypes. 1195 bool isPlaceholderType() const; 1196 1197 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1198 bool isSpecificPlaceholderType(unsigned K) const; 1199 1200 /// isIntegerType() does *not* include complex integers (a GCC extension). 1201 /// isComplexIntegerType() can be used to test for complex integers. 1202 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1203 bool isEnumeralType() const; 1204 bool isBooleanType() const; 1205 bool isCharType() const; 1206 bool isWideCharType() const; 1207 bool isAnyCharacterType() const; 1208 bool isIntegralType(ASTContext &Ctx) const; 1209 1210 /// \brief Determine whether this type is an integral or enumeration type. 1211 bool isIntegralOrEnumerationType() const; 1212 /// \brief Determine whether this type is an integral or unscoped enumeration 1213 /// type. 1214 bool isIntegralOrUnscopedEnumerationType() const; 1215 1216 /// Floating point categories. 1217 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1218 /// isComplexType() does *not* include complex integers (a GCC extension). 1219 /// isComplexIntegerType() can be used to test for complex integers. 1220 bool isComplexType() const; // C99 6.2.5p11 (complex) 1221 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1222 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1223 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1224 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1225 bool isVoidType() const; // C99 6.2.5p19 1226 bool isDerivedType() const; // C99 6.2.5p20 1227 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1228 bool isAggregateType() const; 1229 1230 // Type Predicates: Check to see if this type is structurally the specified 1231 // type, ignoring typedefs and qualifiers. 1232 bool isFunctionType() const; 1233 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1234 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1235 bool isPointerType() const; 1236 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1237 bool isBlockPointerType() const; 1238 bool isVoidPointerType() const; 1239 bool isReferenceType() const; 1240 bool isLValueReferenceType() const; 1241 bool isRValueReferenceType() const; 1242 bool isFunctionPointerType() const; 1243 bool isMemberPointerType() const; 1244 bool isMemberFunctionPointerType() const; 1245 bool isMemberDataPointerType() const; 1246 bool isArrayType() const; 1247 bool isConstantArrayType() const; 1248 bool isIncompleteArrayType() const; 1249 bool isVariableArrayType() const; 1250 bool isDependentSizedArrayType() const; 1251 bool isRecordType() const; 1252 bool isClassType() const; 1253 bool isStructureType() const; 1254 bool isStructureOrClassType() const; 1255 bool isUnionType() const; 1256 bool isComplexIntegerType() const; // GCC _Complex integer type. 1257 bool isVectorType() const; // GCC vector type. 1258 bool isExtVectorType() const; // Extended vector type. 1259 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1260 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1261 // for the common case. 1262 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1263 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1264 bool isObjCQualifiedIdType() const; // id<foo> 1265 bool isObjCQualifiedClassType() const; // Class<foo> 1266 bool isObjCObjectOrInterfaceType() const; 1267 bool isObjCIdType() const; // id 1268 bool isObjCClassType() const; // Class 1269 bool isObjCSelType() const; // Class 1270 bool isObjCBuiltinType() const; // 'id' or 'Class' 1271 bool isTemplateTypeParmType() const; // C++ template type parameter 1272 bool isNullPtrType() const; // C++0x nullptr_t 1273 1274 enum ScalarTypeKind { 1275 STK_Pointer, 1276 STK_MemberPointer, 1277 STK_Bool, 1278 STK_Integral, 1279 STK_Floating, 1280 STK_IntegralComplex, 1281 STK_FloatingComplex 1282 }; 1283 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1284 ScalarTypeKind getScalarTypeKind() const; 1285 1286 /// isDependentType - Whether this type is a dependent type, meaning 1287 /// that its definition somehow depends on a template parameter 1288 /// (C++ [temp.dep.type]). 1289 bool isDependentType() const { return TypeBits.Dependent; } 1290 1291 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1292 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1293 1294 /// \brief Whether this type involves a variable-length array type 1295 /// with a definite size. 1296 bool hasSizedVLAType() const; 1297 1298 /// \brief Whether this type is or contains a local or unnamed type. 1299 bool hasUnnamedOrLocalType() const; 1300 1301 bool isOverloadableType() const; 1302 1303 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1304 bool isElaboratedTypeSpecifier() const; 1305 1306 /// hasPointerRepresentation - Whether this type is represented 1307 /// natively as a pointer; this includes pointers, references, block 1308 /// pointers, and Objective-C interface, qualified id, and qualified 1309 /// interface types, as well as nullptr_t. 1310 bool hasPointerRepresentation() const; 1311 1312 /// hasObjCPointerRepresentation - Whether this type can represent 1313 /// an objective pointer type for the purpose of GC'ability 1314 bool hasObjCPointerRepresentation() const; 1315 1316 /// \brief Determine whether this type has an integer representation 1317 /// of some sort, e.g., it is an integer type or a vector. 1318 bool hasIntegerRepresentation() const; 1319 1320 /// \brief Determine whether this type has an signed integer representation 1321 /// of some sort, e.g., it is an signed integer type or a vector. 1322 bool hasSignedIntegerRepresentation() const; 1323 1324 /// \brief Determine whether this type has an unsigned integer representation 1325 /// of some sort, e.g., it is an unsigned integer type or a vector. 1326 bool hasUnsignedIntegerRepresentation() const; 1327 1328 /// \brief Determine whether this type has a floating-point representation 1329 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1330 bool hasFloatingRepresentation() const; 1331 1332 // Type Checking Functions: Check to see if this type is structurally the 1333 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1334 // the best type we can. 1335 const RecordType *getAsStructureType() const; 1336 /// NOTE: getAs*ArrayType are methods on ASTContext. 1337 const RecordType *getAsUnionType() const; 1338 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1339 // The following is a convenience method that returns an ObjCObjectPointerType 1340 // for object declared using an interface. 1341 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1342 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1343 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1344 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1345 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1346 1347 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1348 /// because the type is a RecordType or because it is the injected-class-name 1349 /// type of a class template or class template partial specialization. 1350 CXXRecordDecl *getAsCXXRecordDecl() const; 1351 1352 /// \brief Get the AutoType whose type will be deduced for a variable with 1353 /// an initializer of this type. This looks through declarators like pointer 1354 /// types, but not through decltype or typedefs. 1355 AutoType *getContainedAutoType() const; 1356 1357 /// Member-template getAs<specific type>'. Look through sugar for 1358 /// an instance of <specific type>. This scheme will eventually 1359 /// replace the specific getAsXXXX methods above. 1360 /// 1361 /// There are some specializations of this member template listed 1362 /// immediately following this class. 1363 template <typename T> const T *getAs() const; 1364 1365 /// A variant of getAs<> for array types which silently discards 1366 /// qualifiers from the outermost type. 1367 const ArrayType *getAsArrayTypeUnsafe() const; 1368 1369 /// Member-template castAs<specific type>. Look through sugar for 1370 /// the underlying instance of <specific type>. 1371 /// 1372 /// This method has the same relationship to getAs<T> as cast<T> has 1373 /// to dyn_cast<T>; which is to say, the underlying type *must* 1374 /// have the intended type, and this method will never return null. 1375 template <typename T> const T *castAs() const; 1376 1377 /// A variant of castAs<> for array type which silently discards 1378 /// qualifiers from the outermost type. 1379 const ArrayType *castAsArrayTypeUnsafe() const; 1380 1381 /// getBaseElementTypeUnsafe - Get the base element type of this 1382 /// type, potentially discarding type qualifiers. This method 1383 /// should never be used when type qualifiers are meaningful. 1384 const Type *getBaseElementTypeUnsafe() const; 1385 1386 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1387 /// element type of the array, potentially with type qualifiers missing. 1388 /// This method should never be used when type qualifiers are meaningful. 1389 const Type *getArrayElementTypeNoTypeQual() const; 1390 1391 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1392 /// pointer, this returns the respective pointee. 1393 QualType getPointeeType() const; 1394 1395 /// getUnqualifiedDesugaredType() - Return the specified type with 1396 /// any "sugar" removed from the type, removing any typedefs, 1397 /// typeofs, etc., as well as any qualifiers. 1398 const Type *getUnqualifiedDesugaredType() const; 1399 1400 /// More type predicates useful for type checking/promotion 1401 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1402 1403 /// isSignedIntegerType - Return true if this is an integer type that is 1404 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1405 /// an enum decl which has a signed representation, or a vector of signed 1406 /// integer element type. 1407 bool isSignedIntegerType() const; 1408 1409 /// isUnsignedIntegerType - Return true if this is an integer type that is 1410 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1411 /// decl which has an unsigned representation, or a vector of unsigned integer 1412 /// element type. 1413 bool isUnsignedIntegerType() const; 1414 1415 /// isConstantSizeType - Return true if this is not a variable sized type, 1416 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1417 /// incomplete types. 1418 bool isConstantSizeType() const; 1419 1420 /// isSpecifierType - Returns true if this type can be represented by some 1421 /// set of type specifiers. 1422 bool isSpecifierType() const; 1423 1424 /// \brief Determine the linkage of this type. 1425 Linkage getLinkage() const; 1426 1427 /// \brief Determine the visibility of this type. 1428 Visibility getVisibility() const; 1429 1430 /// \brief Determine the linkage and visibility of this type. 1431 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1432 1433 /// \brief Note that the linkage is no longer known. 1434 void ClearLinkageCache(); 1435 1436 const char *getTypeClassName() const; 1437 1438 QualType getCanonicalTypeInternal() const { 1439 return CanonicalType; 1440 } 1441 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1442 void dump() const; 1443 static bool classof(const Type *) { return true; } 1444 1445 friend class ASTReader; 1446 friend class ASTWriter; 1447}; 1448 1449template <> inline const TypedefType *Type::getAs() const { 1450 return dyn_cast<TypedefType>(this); 1451} 1452 1453// We can do canonical leaf types faster, because we don't have to 1454// worry about preserving child type decoration. 1455#define TYPE(Class, Base) 1456#define LEAF_TYPE(Class) \ 1457template <> inline const Class##Type *Type::getAs() const { \ 1458 return dyn_cast<Class##Type>(CanonicalType); \ 1459} \ 1460template <> inline const Class##Type *Type::castAs() const { \ 1461 return cast<Class##Type>(CanonicalType); \ 1462} 1463#include "clang/AST/TypeNodes.def" 1464 1465 1466/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1467/// types are always canonical and have a literal name field. 1468class BuiltinType : public Type { 1469public: 1470 enum Kind { 1471 Void, 1472 1473 Bool, // This is bool and/or _Bool. 1474 Char_U, // This is 'char' for targets where char is unsigned. 1475 UChar, // This is explicitly qualified unsigned char. 1476 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1477 Char16, // This is 'char16_t' for C++. 1478 Char32, // This is 'char32_t' for C++. 1479 UShort, 1480 UInt, 1481 ULong, 1482 ULongLong, 1483 UInt128, // __uint128_t 1484 1485 Char_S, // This is 'char' for targets where char is signed. 1486 SChar, // This is explicitly qualified signed char. 1487 WChar_S, // This is 'wchar_t' for C++, when signed. 1488 Short, 1489 Int, 1490 Long, 1491 LongLong, 1492 Int128, // __int128_t 1493 1494 Float, Double, LongDouble, 1495 1496 NullPtr, // This is the type of C++0x 'nullptr'. 1497 1498 /// The primitive Objective C 'id' type. The user-visible 'id' 1499 /// type is a typedef of an ObjCObjectPointerType to an 1500 /// ObjCObjectType with this as its base. In fact, this only ever 1501 /// shows up in an AST as the base type of an ObjCObjectType. 1502 ObjCId, 1503 1504 /// The primitive Objective C 'Class' type. The user-visible 1505 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1506 /// ObjCObjectType with this as its base. In fact, this only ever 1507 /// shows up in an AST as the base type of an ObjCObjectType. 1508 ObjCClass, 1509 1510 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1511 /// type is a typedef of a PointerType to this. 1512 ObjCSel, 1513 1514 /// This represents the type of an expression whose type is 1515 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1516 /// appear in situations where the structure of the type is 1517 /// theoretically deducible. 1518 Dependent, 1519 1520 /// The type of an unresolved overload set. A placeholder type. 1521 /// Expressions with this type have one of the following basic 1522 /// forms, with parentheses generally permitted: 1523 /// foo # possibly qualified, not if an implicit access 1524 /// foo # possibly qualified, not if an implicit access 1525 /// &foo # possibly qualified, not if an implicit access 1526 /// x->foo # only if might be a static member function 1527 /// &x->foo # only if might be a static member function 1528 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1529 /// OverloadExpr::find can be used to analyze the expression. 1530 Overload, 1531 1532 /// The type of a bound C++ non-static member function. 1533 /// A placeholder type. Expressions with this type have one of the 1534 /// following basic forms: 1535 /// foo # if an implicit access 1536 /// x->foo # if only contains non-static members 1537 BoundMember, 1538 1539 /// __builtin_any_type. A placeholder type. Useful for clients 1540 /// like debuggers that don't know what type to give something. 1541 /// Only a small number of operations are valid on expressions of 1542 /// unknown type, most notably explicit casts. 1543 UnknownAny 1544 }; 1545 1546public: 1547 BuiltinType(Kind K) 1548 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1549 /*VariablyModified=*/false, 1550 /*Unexpanded paramter pack=*/false) { 1551 BuiltinTypeBits.Kind = K; 1552 } 1553 1554 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1555 const char *getName(const LangOptions &LO) const; 1556 1557 bool isSugared() const { return false; } 1558 QualType desugar() const { return QualType(this, 0); } 1559 1560 bool isInteger() const { 1561 return getKind() >= Bool && getKind() <= Int128; 1562 } 1563 1564 bool isSignedInteger() const { 1565 return getKind() >= Char_S && getKind() <= Int128; 1566 } 1567 1568 bool isUnsignedInteger() const { 1569 return getKind() >= Bool && getKind() <= UInt128; 1570 } 1571 1572 bool isFloatingPoint() const { 1573 return getKind() >= Float && getKind() <= LongDouble; 1574 } 1575 1576 /// Determines whether this type is a placeholder type, i.e. a type 1577 /// which cannot appear in arbitrary positions in a fully-formed 1578 /// expression. 1579 bool isPlaceholderType() const { 1580 return getKind() >= Overload; 1581 } 1582 1583 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1584 static bool classof(const BuiltinType *) { return true; } 1585}; 1586 1587/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1588/// types (_Complex float etc) as well as the GCC integer complex extensions. 1589/// 1590class ComplexType : public Type, public llvm::FoldingSetNode { 1591 QualType ElementType; 1592 ComplexType(QualType Element, QualType CanonicalPtr) : 1593 Type(Complex, CanonicalPtr, Element->isDependentType(), 1594 Element->isVariablyModifiedType(), 1595 Element->containsUnexpandedParameterPack()), 1596 ElementType(Element) { 1597 } 1598 friend class ASTContext; // ASTContext creates these. 1599 1600public: 1601 QualType getElementType() const { return ElementType; } 1602 1603 bool isSugared() const { return false; } 1604 QualType desugar() const { return QualType(this, 0); } 1605 1606 void Profile(llvm::FoldingSetNodeID &ID) { 1607 Profile(ID, getElementType()); 1608 } 1609 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1610 ID.AddPointer(Element.getAsOpaquePtr()); 1611 } 1612 1613 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1614 static bool classof(const ComplexType *) { return true; } 1615}; 1616 1617/// ParenType - Sugar for parentheses used when specifying types. 1618/// 1619class ParenType : public Type, public llvm::FoldingSetNode { 1620 QualType Inner; 1621 1622 ParenType(QualType InnerType, QualType CanonType) : 1623 Type(Paren, CanonType, InnerType->isDependentType(), 1624 InnerType->isVariablyModifiedType(), 1625 InnerType->containsUnexpandedParameterPack()), 1626 Inner(InnerType) { 1627 } 1628 friend class ASTContext; // ASTContext creates these. 1629 1630public: 1631 1632 QualType getInnerType() const { return Inner; } 1633 1634 bool isSugared() const { return true; } 1635 QualType desugar() const { return getInnerType(); } 1636 1637 void Profile(llvm::FoldingSetNodeID &ID) { 1638 Profile(ID, getInnerType()); 1639 } 1640 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1641 Inner.Profile(ID); 1642 } 1643 1644 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1645 static bool classof(const ParenType *) { return true; } 1646}; 1647 1648/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1649/// 1650class PointerType : public Type, public llvm::FoldingSetNode { 1651 QualType PointeeType; 1652 1653 PointerType(QualType Pointee, QualType CanonicalPtr) : 1654 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1655 Pointee->isVariablyModifiedType(), 1656 Pointee->containsUnexpandedParameterPack()), 1657 PointeeType(Pointee) { 1658 } 1659 friend class ASTContext; // ASTContext creates these. 1660 1661public: 1662 1663 QualType getPointeeType() const { return PointeeType; } 1664 1665 bool isSugared() const { return false; } 1666 QualType desugar() const { return QualType(this, 0); } 1667 1668 void Profile(llvm::FoldingSetNodeID &ID) { 1669 Profile(ID, getPointeeType()); 1670 } 1671 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1672 ID.AddPointer(Pointee.getAsOpaquePtr()); 1673 } 1674 1675 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1676 static bool classof(const PointerType *) { return true; } 1677}; 1678 1679/// BlockPointerType - pointer to a block type. 1680/// This type is to represent types syntactically represented as 1681/// "void (^)(int)", etc. Pointee is required to always be a function type. 1682/// 1683class BlockPointerType : public Type, public llvm::FoldingSetNode { 1684 QualType PointeeType; // Block is some kind of pointer type 1685 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1686 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1687 Pointee->isVariablyModifiedType(), 1688 Pointee->containsUnexpandedParameterPack()), 1689 PointeeType(Pointee) { 1690 } 1691 friend class ASTContext; // ASTContext creates these. 1692 1693public: 1694 1695 // Get the pointee type. Pointee is required to always be a function type. 1696 QualType getPointeeType() const { return PointeeType; } 1697 1698 bool isSugared() const { return false; } 1699 QualType desugar() const { return QualType(this, 0); } 1700 1701 void Profile(llvm::FoldingSetNodeID &ID) { 1702 Profile(ID, getPointeeType()); 1703 } 1704 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1705 ID.AddPointer(Pointee.getAsOpaquePtr()); 1706 } 1707 1708 static bool classof(const Type *T) { 1709 return T->getTypeClass() == BlockPointer; 1710 } 1711 static bool classof(const BlockPointerType *) { return true; } 1712}; 1713 1714/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1715/// 1716class ReferenceType : public Type, public llvm::FoldingSetNode { 1717 QualType PointeeType; 1718 1719protected: 1720 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1721 bool SpelledAsLValue) : 1722 Type(tc, CanonicalRef, Referencee->isDependentType(), 1723 Referencee->isVariablyModifiedType(), 1724 Referencee->containsUnexpandedParameterPack()), 1725 PointeeType(Referencee) 1726 { 1727 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1728 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1729 } 1730 1731public: 1732 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1733 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1734 1735 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1736 QualType getPointeeType() const { 1737 // FIXME: this might strip inner qualifiers; okay? 1738 const ReferenceType *T = this; 1739 while (T->isInnerRef()) 1740 T = T->PointeeType->castAs<ReferenceType>(); 1741 return T->PointeeType; 1742 } 1743 1744 void Profile(llvm::FoldingSetNodeID &ID) { 1745 Profile(ID, PointeeType, isSpelledAsLValue()); 1746 } 1747 static void Profile(llvm::FoldingSetNodeID &ID, 1748 QualType Referencee, 1749 bool SpelledAsLValue) { 1750 ID.AddPointer(Referencee.getAsOpaquePtr()); 1751 ID.AddBoolean(SpelledAsLValue); 1752 } 1753 1754 static bool classof(const Type *T) { 1755 return T->getTypeClass() == LValueReference || 1756 T->getTypeClass() == RValueReference; 1757 } 1758 static bool classof(const ReferenceType *) { return true; } 1759}; 1760 1761/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1762/// 1763class LValueReferenceType : public ReferenceType { 1764 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1765 bool SpelledAsLValue) : 1766 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1767 {} 1768 friend class ASTContext; // ASTContext creates these 1769public: 1770 bool isSugared() const { return false; } 1771 QualType desugar() const { return QualType(this, 0); } 1772 1773 static bool classof(const Type *T) { 1774 return T->getTypeClass() == LValueReference; 1775 } 1776 static bool classof(const LValueReferenceType *) { return true; } 1777}; 1778 1779/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1780/// 1781class RValueReferenceType : public ReferenceType { 1782 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1783 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1784 } 1785 friend class ASTContext; // ASTContext creates these 1786public: 1787 bool isSugared() const { return false; } 1788 QualType desugar() const { return QualType(this, 0); } 1789 1790 static bool classof(const Type *T) { 1791 return T->getTypeClass() == RValueReference; 1792 } 1793 static bool classof(const RValueReferenceType *) { return true; } 1794}; 1795 1796/// MemberPointerType - C++ 8.3.3 - Pointers to members 1797/// 1798class MemberPointerType : public Type, public llvm::FoldingSetNode { 1799 QualType PointeeType; 1800 /// The class of which the pointee is a member. Must ultimately be a 1801 /// RecordType, but could be a typedef or a template parameter too. 1802 const Type *Class; 1803 1804 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1805 Type(MemberPointer, CanonicalPtr, 1806 Cls->isDependentType() || Pointee->isDependentType(), 1807 Pointee->isVariablyModifiedType(), 1808 (Cls->containsUnexpandedParameterPack() || 1809 Pointee->containsUnexpandedParameterPack())), 1810 PointeeType(Pointee), Class(Cls) { 1811 } 1812 friend class ASTContext; // ASTContext creates these. 1813 1814public: 1815 QualType getPointeeType() const { return PointeeType; } 1816 1817 /// Returns true if the member type (i.e. the pointee type) is a 1818 /// function type rather than a data-member type. 1819 bool isMemberFunctionPointer() const { 1820 return PointeeType->isFunctionProtoType(); 1821 } 1822 1823 /// Returns true if the member type (i.e. the pointee type) is a 1824 /// data type rather than a function type. 1825 bool isMemberDataPointer() const { 1826 return !PointeeType->isFunctionProtoType(); 1827 } 1828 1829 const Type *getClass() const { return Class; } 1830 1831 bool isSugared() const { return false; } 1832 QualType desugar() const { return QualType(this, 0); } 1833 1834 void Profile(llvm::FoldingSetNodeID &ID) { 1835 Profile(ID, getPointeeType(), getClass()); 1836 } 1837 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1838 const Type *Class) { 1839 ID.AddPointer(Pointee.getAsOpaquePtr()); 1840 ID.AddPointer(Class); 1841 } 1842 1843 static bool classof(const Type *T) { 1844 return T->getTypeClass() == MemberPointer; 1845 } 1846 static bool classof(const MemberPointerType *) { return true; } 1847}; 1848 1849/// ArrayType - C99 6.7.5.2 - Array Declarators. 1850/// 1851class ArrayType : public Type, public llvm::FoldingSetNode { 1852public: 1853 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1854 /// an array with a static size (e.g. int X[static 4]), or an array 1855 /// with a star size (e.g. int X[*]). 1856 /// 'static' is only allowed on function parameters. 1857 enum ArraySizeModifier { 1858 Normal, Static, Star 1859 }; 1860private: 1861 /// ElementType - The element type of the array. 1862 QualType ElementType; 1863 1864protected: 1865 // C++ [temp.dep.type]p1: 1866 // A type is dependent if it is... 1867 // - an array type constructed from any dependent type or whose 1868 // size is specified by a constant expression that is 1869 // value-dependent, 1870 ArrayType(TypeClass tc, QualType et, QualType can, 1871 ArraySizeModifier sm, unsigned tq, 1872 bool ContainsUnexpandedParameterPack) 1873 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1874 (tc == VariableArray || et->isVariablyModifiedType()), 1875 ContainsUnexpandedParameterPack), 1876 ElementType(et) { 1877 ArrayTypeBits.IndexTypeQuals = tq; 1878 ArrayTypeBits.SizeModifier = sm; 1879 } 1880 1881 friend class ASTContext; // ASTContext creates these. 1882 1883public: 1884 QualType getElementType() const { return ElementType; } 1885 ArraySizeModifier getSizeModifier() const { 1886 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1887 } 1888 Qualifiers getIndexTypeQualifiers() const { 1889 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1890 } 1891 unsigned getIndexTypeCVRQualifiers() const { 1892 return ArrayTypeBits.IndexTypeQuals; 1893 } 1894 1895 static bool classof(const Type *T) { 1896 return T->getTypeClass() == ConstantArray || 1897 T->getTypeClass() == VariableArray || 1898 T->getTypeClass() == IncompleteArray || 1899 T->getTypeClass() == DependentSizedArray; 1900 } 1901 static bool classof(const ArrayType *) { return true; } 1902}; 1903 1904/// ConstantArrayType - This class represents the canonical version of 1905/// C arrays with a specified constant size. For example, the canonical 1906/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1907/// type is 'int' and the size is 404. 1908class ConstantArrayType : public ArrayType { 1909 llvm::APInt Size; // Allows us to unique the type. 1910 1911 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1912 ArraySizeModifier sm, unsigned tq) 1913 : ArrayType(ConstantArray, et, can, sm, tq, 1914 et->containsUnexpandedParameterPack()), 1915 Size(size) {} 1916protected: 1917 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1918 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1919 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1920 Size(size) {} 1921 friend class ASTContext; // ASTContext creates these. 1922public: 1923 const llvm::APInt &getSize() const { return Size; } 1924 bool isSugared() const { return false; } 1925 QualType desugar() const { return QualType(this, 0); } 1926 1927 1928 /// \brief Determine the number of bits required to address a member of 1929 // an array with the given element type and number of elements. 1930 static unsigned getNumAddressingBits(ASTContext &Context, 1931 QualType ElementType, 1932 const llvm::APInt &NumElements); 1933 1934 /// \brief Determine the maximum number of active bits that an array's size 1935 /// can require, which limits the maximum size of the array. 1936 static unsigned getMaxSizeBits(ASTContext &Context); 1937 1938 void Profile(llvm::FoldingSetNodeID &ID) { 1939 Profile(ID, getElementType(), getSize(), 1940 getSizeModifier(), getIndexTypeCVRQualifiers()); 1941 } 1942 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1943 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1944 unsigned TypeQuals) { 1945 ID.AddPointer(ET.getAsOpaquePtr()); 1946 ID.AddInteger(ArraySize.getZExtValue()); 1947 ID.AddInteger(SizeMod); 1948 ID.AddInteger(TypeQuals); 1949 } 1950 static bool classof(const Type *T) { 1951 return T->getTypeClass() == ConstantArray; 1952 } 1953 static bool classof(const ConstantArrayType *) { return true; } 1954}; 1955 1956/// IncompleteArrayType - This class represents C arrays with an unspecified 1957/// size. For example 'int A[]' has an IncompleteArrayType where the element 1958/// type is 'int' and the size is unspecified. 1959class IncompleteArrayType : public ArrayType { 1960 1961 IncompleteArrayType(QualType et, QualType can, 1962 ArraySizeModifier sm, unsigned tq) 1963 : ArrayType(IncompleteArray, et, can, sm, tq, 1964 et->containsUnexpandedParameterPack()) {} 1965 friend class ASTContext; // ASTContext creates these. 1966public: 1967 bool isSugared() const { return false; } 1968 QualType desugar() const { return QualType(this, 0); } 1969 1970 static bool classof(const Type *T) { 1971 return T->getTypeClass() == IncompleteArray; 1972 } 1973 static bool classof(const IncompleteArrayType *) { return true; } 1974 1975 friend class StmtIteratorBase; 1976 1977 void Profile(llvm::FoldingSetNodeID &ID) { 1978 Profile(ID, getElementType(), getSizeModifier(), 1979 getIndexTypeCVRQualifiers()); 1980 } 1981 1982 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1983 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1984 ID.AddPointer(ET.getAsOpaquePtr()); 1985 ID.AddInteger(SizeMod); 1986 ID.AddInteger(TypeQuals); 1987 } 1988}; 1989 1990/// VariableArrayType - This class represents C arrays with a specified size 1991/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1992/// Since the size expression is an arbitrary expression, we store it as such. 1993/// 1994/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1995/// should not be: two lexically equivalent variable array types could mean 1996/// different things, for example, these variables do not have the same type 1997/// dynamically: 1998/// 1999/// void foo(int x) { 2000/// int Y[x]; 2001/// ++x; 2002/// int Z[x]; 2003/// } 2004/// 2005class VariableArrayType : public ArrayType { 2006 /// SizeExpr - An assignment expression. VLA's are only permitted within 2007 /// a function block. 2008 Stmt *SizeExpr; 2009 /// Brackets - The left and right array brackets. 2010 SourceRange Brackets; 2011 2012 VariableArrayType(QualType et, QualType can, Expr *e, 2013 ArraySizeModifier sm, unsigned tq, 2014 SourceRange brackets) 2015 : ArrayType(VariableArray, et, can, sm, tq, 2016 et->containsUnexpandedParameterPack()), 2017 SizeExpr((Stmt*) e), Brackets(brackets) {} 2018 friend class ASTContext; // ASTContext creates these. 2019 2020public: 2021 Expr *getSizeExpr() const { 2022 // We use C-style casts instead of cast<> here because we do not wish 2023 // to have a dependency of Type.h on Stmt.h/Expr.h. 2024 return (Expr*) SizeExpr; 2025 } 2026 SourceRange getBracketsRange() const { return Brackets; } 2027 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2028 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2029 2030 bool isSugared() const { return false; } 2031 QualType desugar() const { return QualType(this, 0); } 2032 2033 static bool classof(const Type *T) { 2034 return T->getTypeClass() == VariableArray; 2035 } 2036 static bool classof(const VariableArrayType *) { return true; } 2037 2038 friend class StmtIteratorBase; 2039 2040 void Profile(llvm::FoldingSetNodeID &ID) { 2041 assert(0 && "Cannot unique VariableArrayTypes."); 2042 } 2043}; 2044 2045/// DependentSizedArrayType - This type represents an array type in 2046/// C++ whose size is a value-dependent expression. For example: 2047/// 2048/// \code 2049/// template<typename T, int Size> 2050/// class array { 2051/// T data[Size]; 2052/// }; 2053/// \endcode 2054/// 2055/// For these types, we won't actually know what the array bound is 2056/// until template instantiation occurs, at which point this will 2057/// become either a ConstantArrayType or a VariableArrayType. 2058class DependentSizedArrayType : public ArrayType { 2059 const ASTContext &Context; 2060 2061 /// \brief An assignment expression that will instantiate to the 2062 /// size of the array. 2063 /// 2064 /// The expression itself might be NULL, in which case the array 2065 /// type will have its size deduced from an initializer. 2066 Stmt *SizeExpr; 2067 2068 /// Brackets - The left and right array brackets. 2069 SourceRange Brackets; 2070 2071 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2072 Expr *e, ArraySizeModifier sm, unsigned tq, 2073 SourceRange brackets); 2074 2075 friend class ASTContext; // ASTContext creates these. 2076 2077public: 2078 Expr *getSizeExpr() const { 2079 // We use C-style casts instead of cast<> here because we do not wish 2080 // to have a dependency of Type.h on Stmt.h/Expr.h. 2081 return (Expr*) SizeExpr; 2082 } 2083 SourceRange getBracketsRange() const { return Brackets; } 2084 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2085 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2086 2087 bool isSugared() const { return false; } 2088 QualType desugar() const { return QualType(this, 0); } 2089 2090 static bool classof(const Type *T) { 2091 return T->getTypeClass() == DependentSizedArray; 2092 } 2093 static bool classof(const DependentSizedArrayType *) { return true; } 2094 2095 friend class StmtIteratorBase; 2096 2097 2098 void Profile(llvm::FoldingSetNodeID &ID) { 2099 Profile(ID, Context, getElementType(), 2100 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2101 } 2102 2103 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2104 QualType ET, ArraySizeModifier SizeMod, 2105 unsigned TypeQuals, Expr *E); 2106}; 2107 2108/// DependentSizedExtVectorType - This type represent an extended vector type 2109/// where either the type or size is dependent. For example: 2110/// @code 2111/// template<typename T, int Size> 2112/// class vector { 2113/// typedef T __attribute__((ext_vector_type(Size))) type; 2114/// } 2115/// @endcode 2116class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2117 const ASTContext &Context; 2118 Expr *SizeExpr; 2119 /// ElementType - The element type of the array. 2120 QualType ElementType; 2121 SourceLocation loc; 2122 2123 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2124 QualType can, Expr *SizeExpr, SourceLocation loc); 2125 2126 friend class ASTContext; 2127 2128public: 2129 Expr *getSizeExpr() const { return SizeExpr; } 2130 QualType getElementType() const { return ElementType; } 2131 SourceLocation getAttributeLoc() const { return loc; } 2132 2133 bool isSugared() const { return false; } 2134 QualType desugar() const { return QualType(this, 0); } 2135 2136 static bool classof(const Type *T) { 2137 return T->getTypeClass() == DependentSizedExtVector; 2138 } 2139 static bool classof(const DependentSizedExtVectorType *) { return true; } 2140 2141 void Profile(llvm::FoldingSetNodeID &ID) { 2142 Profile(ID, Context, getElementType(), getSizeExpr()); 2143 } 2144 2145 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2146 QualType ElementType, Expr *SizeExpr); 2147}; 2148 2149 2150/// VectorType - GCC generic vector type. This type is created using 2151/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2152/// bytes; or from an Altivec __vector or vector declaration. 2153/// Since the constructor takes the number of vector elements, the 2154/// client is responsible for converting the size into the number of elements. 2155class VectorType : public Type, public llvm::FoldingSetNode { 2156public: 2157 enum VectorKind { 2158 GenericVector, // not a target-specific vector type 2159 AltiVecVector, // is AltiVec vector 2160 AltiVecPixel, // is AltiVec 'vector Pixel' 2161 AltiVecBool, // is AltiVec 'vector bool ...' 2162 NeonVector, // is ARM Neon vector 2163 NeonPolyVector // is ARM Neon polynomial vector 2164 }; 2165protected: 2166 /// ElementType - The element type of the vector. 2167 QualType ElementType; 2168 2169 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2170 VectorKind vecKind); 2171 2172 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2173 QualType canonType, VectorKind vecKind); 2174 2175 friend class ASTContext; // ASTContext creates these. 2176 2177public: 2178 2179 QualType getElementType() const { return ElementType; } 2180 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2181 2182 bool isSugared() const { return false; } 2183 QualType desugar() const { return QualType(this, 0); } 2184 2185 VectorKind getVectorKind() const { 2186 return VectorKind(VectorTypeBits.VecKind); 2187 } 2188 2189 void Profile(llvm::FoldingSetNodeID &ID) { 2190 Profile(ID, getElementType(), getNumElements(), 2191 getTypeClass(), getVectorKind()); 2192 } 2193 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2194 unsigned NumElements, TypeClass TypeClass, 2195 VectorKind VecKind) { 2196 ID.AddPointer(ElementType.getAsOpaquePtr()); 2197 ID.AddInteger(NumElements); 2198 ID.AddInteger(TypeClass); 2199 ID.AddInteger(VecKind); 2200 } 2201 2202 static bool classof(const Type *T) { 2203 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2204 } 2205 static bool classof(const VectorType *) { return true; } 2206}; 2207 2208/// ExtVectorType - Extended vector type. This type is created using 2209/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2210/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2211/// class enables syntactic extensions, like Vector Components for accessing 2212/// points, colors, and textures (modeled after OpenGL Shading Language). 2213class ExtVectorType : public VectorType { 2214 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2215 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2216 friend class ASTContext; // ASTContext creates these. 2217public: 2218 static int getPointAccessorIdx(char c) { 2219 switch (c) { 2220 default: return -1; 2221 case 'x': return 0; 2222 case 'y': return 1; 2223 case 'z': return 2; 2224 case 'w': return 3; 2225 } 2226 } 2227 static int getNumericAccessorIdx(char c) { 2228 switch (c) { 2229 default: return -1; 2230 case '0': return 0; 2231 case '1': return 1; 2232 case '2': return 2; 2233 case '3': return 3; 2234 case '4': return 4; 2235 case '5': return 5; 2236 case '6': return 6; 2237 case '7': return 7; 2238 case '8': return 8; 2239 case '9': return 9; 2240 case 'A': 2241 case 'a': return 10; 2242 case 'B': 2243 case 'b': return 11; 2244 case 'C': 2245 case 'c': return 12; 2246 case 'D': 2247 case 'd': return 13; 2248 case 'E': 2249 case 'e': return 14; 2250 case 'F': 2251 case 'f': return 15; 2252 } 2253 } 2254 2255 static int getAccessorIdx(char c) { 2256 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2257 return getNumericAccessorIdx(c); 2258 } 2259 2260 bool isAccessorWithinNumElements(char c) const { 2261 if (int idx = getAccessorIdx(c)+1) 2262 return unsigned(idx-1) < getNumElements(); 2263 return false; 2264 } 2265 bool isSugared() const { return false; } 2266 QualType desugar() const { return QualType(this, 0); } 2267 2268 static bool classof(const Type *T) { 2269 return T->getTypeClass() == ExtVector; 2270 } 2271 static bool classof(const ExtVectorType *) { return true; } 2272}; 2273 2274/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2275/// class of FunctionNoProtoType and FunctionProtoType. 2276/// 2277class FunctionType : public Type { 2278 // The type returned by the function. 2279 QualType ResultType; 2280 2281 public: 2282 /// ExtInfo - A class which abstracts out some details necessary for 2283 /// making a call. 2284 /// 2285 /// It is not actually used directly for storing this information in 2286 /// a FunctionType, although FunctionType does currently use the 2287 /// same bit-pattern. 2288 /// 2289 // If you add a field (say Foo), other than the obvious places (both, 2290 // constructors, compile failures), what you need to update is 2291 // * Operator== 2292 // * getFoo 2293 // * withFoo 2294 // * functionType. Add Foo, getFoo. 2295 // * ASTContext::getFooType 2296 // * ASTContext::mergeFunctionTypes 2297 // * FunctionNoProtoType::Profile 2298 // * FunctionProtoType::Profile 2299 // * TypePrinter::PrintFunctionProto 2300 // * AST read and write 2301 // * Codegen 2302 class ExtInfo { 2303 // Feel free to rearrange or add bits, but if you go over 8, 2304 // you'll need to adjust both the Bits field below and 2305 // Type::FunctionTypeBitfields. 2306 2307 // | CC |noreturn|hasregparm|regparm 2308 // |0 .. 2| 3 | 4 |5 .. 7 2309 enum { CallConvMask = 0x7 }; 2310 enum { NoReturnMask = 0x8 }; 2311 enum { HasRegParmMask = 0x10 }; 2312 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2313 RegParmOffset = 5 }; 2314 2315 unsigned char Bits; 2316 2317 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2318 2319 friend class FunctionType; 2320 2321 public: 2322 // Constructor with no defaults. Use this when you know that you 2323 // have all the elements (when reading an AST file for example). 2324 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc) { 2325 Bits = ((unsigned) cc) | 2326 (noReturn ? NoReturnMask : 0) | 2327 (hasRegParm ? HasRegParmMask : 0) | 2328 (regParm << RegParmOffset); 2329 } 2330 2331 // Constructor with all defaults. Use when for example creating a 2332 // function know to use defaults. 2333 ExtInfo() : Bits(0) {} 2334 2335 bool getNoReturn() const { return Bits & NoReturnMask; } 2336 bool getHasRegParm() const { return Bits & HasRegParmMask; } 2337 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2338 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2339 2340 bool operator==(ExtInfo Other) const { 2341 return Bits == Other.Bits; 2342 } 2343 bool operator!=(ExtInfo Other) const { 2344 return Bits != Other.Bits; 2345 } 2346 2347 // Note that we don't have setters. That is by design, use 2348 // the following with methods instead of mutating these objects. 2349 2350 ExtInfo withNoReturn(bool noReturn) const { 2351 if (noReturn) 2352 return ExtInfo(Bits | NoReturnMask); 2353 else 2354 return ExtInfo(Bits & ~NoReturnMask); 2355 } 2356 2357 ExtInfo withRegParm(unsigned RegParm) const { 2358 return ExtInfo(HasRegParmMask | (Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2359 } 2360 2361 ExtInfo withCallingConv(CallingConv cc) const { 2362 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2363 } 2364 2365 void Profile(llvm::FoldingSetNodeID &ID) const { 2366 ID.AddInteger(Bits); 2367 } 2368 }; 2369 2370protected: 2371 FunctionType(TypeClass tc, QualType res, bool variadic, 2372 unsigned typeQuals, RefQualifierKind RefQualifier, 2373 QualType Canonical, bool Dependent, 2374 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2375 ExtInfo Info) 2376 : Type(tc, Canonical, Dependent, VariablyModified, 2377 ContainsUnexpandedParameterPack), 2378 ResultType(res) { 2379 FunctionTypeBits.ExtInfo = Info.Bits; 2380 FunctionTypeBits.Variadic = variadic; 2381 FunctionTypeBits.TypeQuals = typeQuals; 2382 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2383 } 2384 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2385 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2386 2387 RefQualifierKind getRefQualifier() const { 2388 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2389 } 2390 2391public: 2392 2393 QualType getResultType() const { return ResultType; } 2394 2395 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2396 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2397 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2398 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2399 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2400 2401 /// \brief Determine the type of an expression that calls a function of 2402 /// this type. 2403 QualType getCallResultType(ASTContext &Context) const { 2404 return getResultType().getNonLValueExprType(Context); 2405 } 2406 2407 static llvm::StringRef getNameForCallConv(CallingConv CC); 2408 2409 static bool classof(const Type *T) { 2410 return T->getTypeClass() == FunctionNoProto || 2411 T->getTypeClass() == FunctionProto; 2412 } 2413 static bool classof(const FunctionType *) { return true; } 2414}; 2415 2416/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2417/// no information available about its arguments. 2418class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2419 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2420 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2421 /*Dependent=*/false, Result->isVariablyModifiedType(), 2422 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2423 2424 friend class ASTContext; // ASTContext creates these. 2425 2426public: 2427 // No additional state past what FunctionType provides. 2428 2429 bool isSugared() const { return false; } 2430 QualType desugar() const { return QualType(this, 0); } 2431 2432 void Profile(llvm::FoldingSetNodeID &ID) { 2433 Profile(ID, getResultType(), getExtInfo()); 2434 } 2435 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2436 ExtInfo Info) { 2437 Info.Profile(ID); 2438 ID.AddPointer(ResultType.getAsOpaquePtr()); 2439 } 2440 2441 static bool classof(const Type *T) { 2442 return T->getTypeClass() == FunctionNoProto; 2443 } 2444 static bool classof(const FunctionNoProtoType *) { return true; } 2445}; 2446 2447/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2448/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2449/// arguments, not as having a single void argument. Such a type can have an 2450/// exception specification, but this specification is not part of the canonical 2451/// type. 2452class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2453public: 2454 /// ExtProtoInfo - Extra information about a function prototype. 2455 struct ExtProtoInfo { 2456 ExtProtoInfo() : 2457 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2458 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0) {} 2459 2460 FunctionType::ExtInfo ExtInfo; 2461 bool Variadic; 2462 ExceptionSpecificationType ExceptionSpecType; 2463 unsigned char TypeQuals; 2464 RefQualifierKind RefQualifier; 2465 unsigned NumExceptions; 2466 const QualType *Exceptions; 2467 Expr *NoexceptExpr; 2468 }; 2469 2470private: 2471 /// \brief Determine whether there are any argument types that 2472 /// contain an unexpanded parameter pack. 2473 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2474 unsigned numArgs) { 2475 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2476 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2477 return true; 2478 2479 return false; 2480 } 2481 2482 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2483 QualType canonical, const ExtProtoInfo &epi); 2484 2485 /// NumArgs - The number of arguments this function has, not counting '...'. 2486 unsigned NumArgs : 20; 2487 2488 /// NumExceptions - The number of types in the exception spec, if any. 2489 unsigned NumExceptions : 9; 2490 2491 /// ExceptionSpecType - The type of exception specification this function has. 2492 unsigned ExceptionSpecType : 3; 2493 2494 /// ArgInfo - There is an variable size array after the class in memory that 2495 /// holds the argument types. 2496 2497 /// Exceptions - There is another variable size array after ArgInfo that 2498 /// holds the exception types. 2499 2500 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2501 /// to the expression in the noexcept() specifier. 2502 2503 friend class ASTContext; // ASTContext creates these. 2504 2505public: 2506 unsigned getNumArgs() const { return NumArgs; } 2507 QualType getArgType(unsigned i) const { 2508 assert(i < NumArgs && "Invalid argument number!"); 2509 return arg_type_begin()[i]; 2510 } 2511 2512 ExtProtoInfo getExtProtoInfo() const { 2513 ExtProtoInfo EPI; 2514 EPI.ExtInfo = getExtInfo(); 2515 EPI.Variadic = isVariadic(); 2516 EPI.ExceptionSpecType = getExceptionSpecType(); 2517 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2518 EPI.RefQualifier = getRefQualifier(); 2519 if (EPI.ExceptionSpecType == EST_Dynamic) { 2520 EPI.NumExceptions = NumExceptions; 2521 EPI.Exceptions = exception_begin(); 2522 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2523 EPI.NoexceptExpr = getNoexceptExpr(); 2524 } 2525 return EPI; 2526 } 2527 2528 /// \brief Get the kind of exception specification on this function. 2529 ExceptionSpecificationType getExceptionSpecType() const { 2530 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2531 } 2532 /// \brief Return whether this function has any kind of exception spec. 2533 bool hasExceptionSpec() const { 2534 return getExceptionSpecType() != EST_None; 2535 } 2536 /// \brief Return whether this function has a dynamic (throw) exception spec. 2537 bool hasDynamicExceptionSpec() const { 2538 return isDynamicExceptionSpec(getExceptionSpecType()); 2539 } 2540 /// \brief Return whether this function has a noexcept exception spec. 2541 bool hasNoexceptExceptionSpec() const { 2542 return isNoexceptExceptionSpec(getExceptionSpecType()); 2543 } 2544 /// \brief Result type of getNoexceptSpec(). 2545 enum NoexceptResult { 2546 NR_NoNoexcept, ///< There is no noexcept specifier. 2547 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2548 NR_Dependent, ///< The noexcept specifier is dependent. 2549 NR_Throw, ///< The noexcept specifier evaluates to false. 2550 NR_Nothrow ///< The noexcept specifier evaluates to true. 2551 }; 2552 /// \brief Get the meaning of the noexcept spec on this function, if any. 2553 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2554 unsigned getNumExceptions() const { return NumExceptions; } 2555 QualType getExceptionType(unsigned i) const { 2556 assert(i < NumExceptions && "Invalid exception number!"); 2557 return exception_begin()[i]; 2558 } 2559 Expr *getNoexceptExpr() const { 2560 if (getExceptionSpecType() != EST_ComputedNoexcept) 2561 return 0; 2562 // NoexceptExpr sits where the arguments end. 2563 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2564 } 2565 bool isNothrow(ASTContext &Ctx) const { 2566 ExceptionSpecificationType EST = getExceptionSpecType(); 2567 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2568 return true; 2569 if (EST != EST_ComputedNoexcept) 2570 return false; 2571 return getNoexceptSpec(Ctx) == NR_Nothrow; 2572 } 2573 2574 using FunctionType::isVariadic; 2575 2576 /// \brief Determines whether this function prototype contains a 2577 /// parameter pack at the end. 2578 /// 2579 /// A function template whose last parameter is a parameter pack can be 2580 /// called with an arbitrary number of arguments, much like a variadic 2581 /// function. However, 2582 bool isTemplateVariadic() const; 2583 2584 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2585 2586 2587 /// \brief Retrieve the ref-qualifier associated with this function type. 2588 RefQualifierKind getRefQualifier() const { 2589 return FunctionType::getRefQualifier(); 2590 } 2591 2592 typedef const QualType *arg_type_iterator; 2593 arg_type_iterator arg_type_begin() const { 2594 return reinterpret_cast<const QualType *>(this+1); 2595 } 2596 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2597 2598 typedef const QualType *exception_iterator; 2599 exception_iterator exception_begin() const { 2600 // exceptions begin where arguments end 2601 return arg_type_end(); 2602 } 2603 exception_iterator exception_end() const { 2604 if (getExceptionSpecType() != EST_Dynamic) 2605 return exception_begin(); 2606 return exception_begin() + NumExceptions; 2607 } 2608 2609 bool isSugared() const { return false; } 2610 QualType desugar() const { return QualType(this, 0); } 2611 2612 static bool classof(const Type *T) { 2613 return T->getTypeClass() == FunctionProto; 2614 } 2615 static bool classof(const FunctionProtoType *) { return true; } 2616 2617 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2618 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2619 arg_type_iterator ArgTys, unsigned NumArgs, 2620 const ExtProtoInfo &EPI, const ASTContext &Context); 2621}; 2622 2623 2624/// \brief Represents the dependent type named by a dependently-scoped 2625/// typename using declaration, e.g. 2626/// using typename Base<T>::foo; 2627/// Template instantiation turns these into the underlying type. 2628class UnresolvedUsingType : public Type { 2629 UnresolvedUsingTypenameDecl *Decl; 2630 2631 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2632 : Type(UnresolvedUsing, QualType(), true, false, 2633 /*ContainsUnexpandedParameterPack=*/false), 2634 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2635 friend class ASTContext; // ASTContext creates these. 2636public: 2637 2638 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2639 2640 bool isSugared() const { return false; } 2641 QualType desugar() const { return QualType(this, 0); } 2642 2643 static bool classof(const Type *T) { 2644 return T->getTypeClass() == UnresolvedUsing; 2645 } 2646 static bool classof(const UnresolvedUsingType *) { return true; } 2647 2648 void Profile(llvm::FoldingSetNodeID &ID) { 2649 return Profile(ID, Decl); 2650 } 2651 static void Profile(llvm::FoldingSetNodeID &ID, 2652 UnresolvedUsingTypenameDecl *D) { 2653 ID.AddPointer(D); 2654 } 2655}; 2656 2657 2658class TypedefType : public Type { 2659 TypedefNameDecl *Decl; 2660protected: 2661 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2662 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2663 /*ContainsUnexpandedParameterPack=*/false), 2664 Decl(const_cast<TypedefNameDecl*>(D)) { 2665 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2666 } 2667 friend class ASTContext; // ASTContext creates these. 2668public: 2669 2670 TypedefNameDecl *getDecl() const { return Decl; } 2671 2672 bool isSugared() const { return true; } 2673 QualType desugar() const; 2674 2675 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2676 static bool classof(const TypedefType *) { return true; } 2677}; 2678 2679/// TypeOfExprType (GCC extension). 2680class TypeOfExprType : public Type { 2681 Expr *TOExpr; 2682 2683protected: 2684 TypeOfExprType(Expr *E, QualType can = QualType()); 2685 friend class ASTContext; // ASTContext creates these. 2686public: 2687 Expr *getUnderlyingExpr() const { return TOExpr; } 2688 2689 /// \brief Remove a single level of sugar. 2690 QualType desugar() const; 2691 2692 /// \brief Returns whether this type directly provides sugar. 2693 bool isSugared() const { return true; } 2694 2695 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2696 static bool classof(const TypeOfExprType *) { return true; } 2697}; 2698 2699/// \brief Internal representation of canonical, dependent 2700/// typeof(expr) types. 2701/// 2702/// This class is used internally by the ASTContext to manage 2703/// canonical, dependent types, only. Clients will only see instances 2704/// of this class via TypeOfExprType nodes. 2705class DependentTypeOfExprType 2706 : public TypeOfExprType, public llvm::FoldingSetNode { 2707 const ASTContext &Context; 2708 2709public: 2710 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2711 : TypeOfExprType(E), Context(Context) { } 2712 2713 bool isSugared() const { return false; } 2714 QualType desugar() const { return QualType(this, 0); } 2715 2716 void Profile(llvm::FoldingSetNodeID &ID) { 2717 Profile(ID, Context, getUnderlyingExpr()); 2718 } 2719 2720 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2721 Expr *E); 2722}; 2723 2724/// TypeOfType (GCC extension). 2725class TypeOfType : public Type { 2726 QualType TOType; 2727 TypeOfType(QualType T, QualType can) 2728 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2729 T->containsUnexpandedParameterPack()), 2730 TOType(T) { 2731 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2732 } 2733 friend class ASTContext; // ASTContext creates these. 2734public: 2735 QualType getUnderlyingType() const { return TOType; } 2736 2737 /// \brief Remove a single level of sugar. 2738 QualType desugar() const { return getUnderlyingType(); } 2739 2740 /// \brief Returns whether this type directly provides sugar. 2741 bool isSugared() const { return true; } 2742 2743 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2744 static bool classof(const TypeOfType *) { return true; } 2745}; 2746 2747/// DecltypeType (C++0x) 2748class DecltypeType : public Type { 2749 Expr *E; 2750 2751 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2752 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2753 // from it. 2754 QualType UnderlyingType; 2755 2756protected: 2757 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2758 friend class ASTContext; // ASTContext creates these. 2759public: 2760 Expr *getUnderlyingExpr() const { return E; } 2761 QualType getUnderlyingType() const { return UnderlyingType; } 2762 2763 /// \brief Remove a single level of sugar. 2764 QualType desugar() const { return getUnderlyingType(); } 2765 2766 /// \brief Returns whether this type directly provides sugar. 2767 bool isSugared() const { return !isDependentType(); } 2768 2769 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2770 static bool classof(const DecltypeType *) { return true; } 2771}; 2772 2773/// \brief Internal representation of canonical, dependent 2774/// decltype(expr) types. 2775/// 2776/// This class is used internally by the ASTContext to manage 2777/// canonical, dependent types, only. Clients will only see instances 2778/// of this class via DecltypeType nodes. 2779class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2780 const ASTContext &Context; 2781 2782public: 2783 DependentDecltypeType(const ASTContext &Context, Expr *E); 2784 2785 bool isSugared() const { return false; } 2786 QualType desugar() const { return QualType(this, 0); } 2787 2788 void Profile(llvm::FoldingSetNodeID &ID) { 2789 Profile(ID, Context, getUnderlyingExpr()); 2790 } 2791 2792 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2793 Expr *E); 2794}; 2795 2796class TagType : public Type { 2797 /// Stores the TagDecl associated with this type. The decl may point to any 2798 /// TagDecl that declares the entity. 2799 TagDecl * decl; 2800 2801protected: 2802 TagType(TypeClass TC, const TagDecl *D, QualType can); 2803 2804public: 2805 TagDecl *getDecl() const; 2806 2807 /// @brief Determines whether this type is in the process of being 2808 /// defined. 2809 bool isBeingDefined() const; 2810 2811 static bool classof(const Type *T) { 2812 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2813 } 2814 static bool classof(const TagType *) { return true; } 2815 static bool classof(const RecordType *) { return true; } 2816 static bool classof(const EnumType *) { return true; } 2817}; 2818 2819/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2820/// to detect TagType objects of structs/unions/classes. 2821class RecordType : public TagType { 2822protected: 2823 explicit RecordType(const RecordDecl *D) 2824 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2825 explicit RecordType(TypeClass TC, RecordDecl *D) 2826 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2827 friend class ASTContext; // ASTContext creates these. 2828public: 2829 2830 RecordDecl *getDecl() const { 2831 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2832 } 2833 2834 // FIXME: This predicate is a helper to QualType/Type. It needs to 2835 // recursively check all fields for const-ness. If any field is declared 2836 // const, it needs to return false. 2837 bool hasConstFields() const { return false; } 2838 2839 /// \brief Whether this class has standard layout 2840 bool hasStandardLayout(ASTContext& Ctx) const; 2841 2842 bool isSugared() const { return false; } 2843 QualType desugar() const { return QualType(this, 0); } 2844 2845 static bool classof(const TagType *T); 2846 static bool classof(const Type *T) { 2847 return isa<TagType>(T) && classof(cast<TagType>(T)); 2848 } 2849 static bool classof(const RecordType *) { return true; } 2850}; 2851 2852/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2853/// to detect TagType objects of enums. 2854class EnumType : public TagType { 2855 explicit EnumType(const EnumDecl *D) 2856 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2857 friend class ASTContext; // ASTContext creates these. 2858public: 2859 2860 EnumDecl *getDecl() const { 2861 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2862 } 2863 2864 bool isSugared() const { return false; } 2865 QualType desugar() const { return QualType(this, 0); } 2866 2867 static bool classof(const TagType *T); 2868 static bool classof(const Type *T) { 2869 return isa<TagType>(T) && classof(cast<TagType>(T)); 2870 } 2871 static bool classof(const EnumType *) { return true; } 2872}; 2873 2874/// AttributedType - An attributed type is a type to which a type 2875/// attribute has been applied. The "modified type" is the 2876/// fully-sugared type to which the attributed type was applied; 2877/// generally it is not canonically equivalent to the attributed type. 2878/// The "equivalent type" is the minimally-desugared type which the 2879/// type is canonically equivalent to. 2880/// 2881/// For example, in the following attributed type: 2882/// int32_t __attribute__((vector_size(16))) 2883/// - the modified type is the TypedefType for int32_t 2884/// - the equivalent type is VectorType(16, int32_t) 2885/// - the canonical type is VectorType(16, int) 2886class AttributedType : public Type, public llvm::FoldingSetNode { 2887public: 2888 // It is really silly to have yet another attribute-kind enum, but 2889 // clang::attr::Kind doesn't currently cover the pure type attrs. 2890 enum Kind { 2891 // Expression operand. 2892 attr_address_space, 2893 attr_regparm, 2894 attr_vector_size, 2895 attr_neon_vector_type, 2896 attr_neon_polyvector_type, 2897 2898 FirstExprOperandKind = attr_address_space, 2899 LastExprOperandKind = attr_neon_polyvector_type, 2900 2901 // Enumerated operand (string or keyword). 2902 attr_objc_gc, 2903 attr_pcs, 2904 2905 FirstEnumOperandKind = attr_objc_gc, 2906 LastEnumOperandKind = attr_pcs, 2907 2908 // No operand. 2909 attr_noreturn, 2910 attr_cdecl, 2911 attr_fastcall, 2912 attr_stdcall, 2913 attr_thiscall, 2914 attr_pascal 2915 }; 2916 2917private: 2918 QualType ModifiedType; 2919 QualType EquivalentType; 2920 2921 friend class ASTContext; // creates these 2922 2923 AttributedType(QualType canon, Kind attrKind, 2924 QualType modified, QualType equivalent) 2925 : Type(Attributed, canon, canon->isDependentType(), 2926 canon->isVariablyModifiedType(), 2927 canon->containsUnexpandedParameterPack()), 2928 ModifiedType(modified), EquivalentType(equivalent) { 2929 AttributedTypeBits.AttrKind = attrKind; 2930 } 2931 2932public: 2933 Kind getAttrKind() const { 2934 return static_cast<Kind>(AttributedTypeBits.AttrKind); 2935 } 2936 2937 QualType getModifiedType() const { return ModifiedType; } 2938 QualType getEquivalentType() const { return EquivalentType; } 2939 2940 bool isSugared() const { return true; } 2941 QualType desugar() const { return getEquivalentType(); } 2942 2943 void Profile(llvm::FoldingSetNodeID &ID) { 2944 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 2945 } 2946 2947 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 2948 QualType modified, QualType equivalent) { 2949 ID.AddInteger(attrKind); 2950 ID.AddPointer(modified.getAsOpaquePtr()); 2951 ID.AddPointer(equivalent.getAsOpaquePtr()); 2952 } 2953 2954 static bool classof(const Type *T) { 2955 return T->getTypeClass() == Attributed; 2956 } 2957 static bool classof(const AttributedType *T) { return true; } 2958}; 2959 2960class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2961 unsigned Depth : 15; 2962 unsigned ParameterPack : 1; 2963 unsigned Index : 16; 2964 IdentifierInfo *Name; 2965 2966 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2967 QualType Canon) 2968 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2969 /*VariablyModified=*/false, PP), 2970 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2971 2972 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2973 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2974 /*VariablyModified=*/false, PP), 2975 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2976 2977 friend class ASTContext; // ASTContext creates these 2978 2979public: 2980 unsigned getDepth() const { return Depth; } 2981 unsigned getIndex() const { return Index; } 2982 bool isParameterPack() const { return ParameterPack; } 2983 IdentifierInfo *getName() const { return Name; } 2984 2985 bool isSugared() const { return false; } 2986 QualType desugar() const { return QualType(this, 0); } 2987 2988 void Profile(llvm::FoldingSetNodeID &ID) { 2989 Profile(ID, Depth, Index, ParameterPack, Name); 2990 } 2991 2992 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2993 unsigned Index, bool ParameterPack, 2994 IdentifierInfo *Name) { 2995 ID.AddInteger(Depth); 2996 ID.AddInteger(Index); 2997 ID.AddBoolean(ParameterPack); 2998 ID.AddPointer(Name); 2999 } 3000 3001 static bool classof(const Type *T) { 3002 return T->getTypeClass() == TemplateTypeParm; 3003 } 3004 static bool classof(const TemplateTypeParmType *T) { return true; } 3005}; 3006 3007/// \brief Represents the result of substituting a type for a template 3008/// type parameter. 3009/// 3010/// Within an instantiated template, all template type parameters have 3011/// been replaced with these. They are used solely to record that a 3012/// type was originally written as a template type parameter; 3013/// therefore they are never canonical. 3014class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3015 // The original type parameter. 3016 const TemplateTypeParmType *Replaced; 3017 3018 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3019 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3020 Canon->isVariablyModifiedType(), 3021 Canon->containsUnexpandedParameterPack()), 3022 Replaced(Param) { } 3023 3024 friend class ASTContext; 3025 3026public: 3027 IdentifierInfo *getName() const { return Replaced->getName(); } 3028 3029 /// Gets the template parameter that was substituted for. 3030 const TemplateTypeParmType *getReplacedParameter() const { 3031 return Replaced; 3032 } 3033 3034 /// Gets the type that was substituted for the template 3035 /// parameter. 3036 QualType getReplacementType() const { 3037 return getCanonicalTypeInternal(); 3038 } 3039 3040 bool isSugared() const { return true; } 3041 QualType desugar() const { return getReplacementType(); } 3042 3043 void Profile(llvm::FoldingSetNodeID &ID) { 3044 Profile(ID, getReplacedParameter(), getReplacementType()); 3045 } 3046 static void Profile(llvm::FoldingSetNodeID &ID, 3047 const TemplateTypeParmType *Replaced, 3048 QualType Replacement) { 3049 ID.AddPointer(Replaced); 3050 ID.AddPointer(Replacement.getAsOpaquePtr()); 3051 } 3052 3053 static bool classof(const Type *T) { 3054 return T->getTypeClass() == SubstTemplateTypeParm; 3055 } 3056 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3057}; 3058 3059/// \brief Represents the result of substituting a set of types for a template 3060/// type parameter pack. 3061/// 3062/// When a pack expansion in the source code contains multiple parameter packs 3063/// and those parameter packs correspond to different levels of template 3064/// parameter lists, this type node is used to represent a template type 3065/// parameter pack from an outer level, which has already had its argument pack 3066/// substituted but that still lives within a pack expansion that itself 3067/// could not be instantiated. When actually performing a substitution into 3068/// that pack expansion (e.g., when all template parameters have corresponding 3069/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3070/// at the current pack substitution index. 3071class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3072 /// \brief The original type parameter. 3073 const TemplateTypeParmType *Replaced; 3074 3075 /// \brief A pointer to the set of template arguments that this 3076 /// parameter pack is instantiated with. 3077 const TemplateArgument *Arguments; 3078 3079 /// \brief The number of template arguments in \c Arguments. 3080 unsigned NumArguments; 3081 3082 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3083 QualType Canon, 3084 const TemplateArgument &ArgPack); 3085 3086 friend class ASTContext; 3087 3088public: 3089 IdentifierInfo *getName() const { return Replaced->getName(); } 3090 3091 /// Gets the template parameter that was substituted for. 3092 const TemplateTypeParmType *getReplacedParameter() const { 3093 return Replaced; 3094 } 3095 3096 bool isSugared() const { return false; } 3097 QualType desugar() const { return QualType(this, 0); } 3098 3099 TemplateArgument getArgumentPack() const; 3100 3101 void Profile(llvm::FoldingSetNodeID &ID); 3102 static void Profile(llvm::FoldingSetNodeID &ID, 3103 const TemplateTypeParmType *Replaced, 3104 const TemplateArgument &ArgPack); 3105 3106 static bool classof(const Type *T) { 3107 return T->getTypeClass() == SubstTemplateTypeParmPack; 3108 } 3109 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3110}; 3111 3112/// \brief Represents a C++0x auto type. 3113/// 3114/// These types are usually a placeholder for a deduced type. However, within 3115/// templates and before the initializer is attached, there is no deduced type 3116/// and an auto type is type-dependent and canonical. 3117class AutoType : public Type, public llvm::FoldingSetNode { 3118 AutoType(QualType DeducedType) 3119 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3120 /*Dependent=*/DeducedType.isNull(), 3121 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3122 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3123 "deduced a dependent type for auto"); 3124 } 3125 3126 friend class ASTContext; // ASTContext creates these 3127 3128public: 3129 bool isSugared() const { return isDeduced(); } 3130 QualType desugar() const { return getCanonicalTypeInternal(); } 3131 3132 QualType getDeducedType() const { 3133 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3134 } 3135 bool isDeduced() const { 3136 return !isDependentType(); 3137 } 3138 3139 void Profile(llvm::FoldingSetNodeID &ID) { 3140 Profile(ID, getDeducedType()); 3141 } 3142 3143 static void Profile(llvm::FoldingSetNodeID &ID, 3144 QualType Deduced) { 3145 ID.AddPointer(Deduced.getAsOpaquePtr()); 3146 } 3147 3148 static bool classof(const Type *T) { 3149 return T->getTypeClass() == Auto; 3150 } 3151 static bool classof(const AutoType *T) { return true; } 3152}; 3153 3154/// \brief Represents the type of a template specialization as written 3155/// in the source code. 3156/// 3157/// Template specialization types represent the syntactic form of a 3158/// template-id that refers to a type, e.g., @c vector<int>. Some 3159/// template specialization types are syntactic sugar, whose canonical 3160/// type will point to some other type node that represents the 3161/// instantiation or class template specialization. For example, a 3162/// class template specialization type of @c vector<int> will refer to 3163/// a tag type for the instantiation 3164/// @c std::vector<int, std::allocator<int>>. 3165/// 3166/// Other template specialization types, for which the template name 3167/// is dependent, may be canonical types. These types are always 3168/// dependent. 3169class TemplateSpecializationType 3170 : public Type, public llvm::FoldingSetNode { 3171 /// \brief The name of the template being specialized. 3172 TemplateName Template; 3173 3174 /// \brief - The number of template arguments named in this class 3175 /// template specialization. 3176 unsigned NumArgs; 3177 3178 TemplateSpecializationType(TemplateName T, 3179 const TemplateArgument *Args, 3180 unsigned NumArgs, QualType Canon); 3181 3182 friend class ASTContext; // ASTContext creates these 3183 3184public: 3185 /// \brief Determine whether any of the given template arguments are 3186 /// dependent. 3187 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3188 unsigned NumArgs); 3189 3190 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3191 unsigned NumArgs); 3192 3193 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 3194 3195 /// \brief Print a template argument list, including the '<' and '>' 3196 /// enclosing the template arguments. 3197 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3198 unsigned NumArgs, 3199 const PrintingPolicy &Policy, 3200 bool SkipBrackets = false); 3201 3202 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3203 unsigned NumArgs, 3204 const PrintingPolicy &Policy); 3205 3206 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3207 const PrintingPolicy &Policy); 3208 3209 /// True if this template specialization type matches a current 3210 /// instantiation in the context in which it is found. 3211 bool isCurrentInstantiation() const { 3212 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3213 } 3214 3215 typedef const TemplateArgument * iterator; 3216 3217 iterator begin() const { return getArgs(); } 3218 iterator end() const; // defined inline in TemplateBase.h 3219 3220 /// \brief Retrieve the name of the template that we are specializing. 3221 TemplateName getTemplateName() const { return Template; } 3222 3223 /// \brief Retrieve the template arguments. 3224 const TemplateArgument *getArgs() const { 3225 return reinterpret_cast<const TemplateArgument *>(this + 1); 3226 } 3227 3228 /// \brief Retrieve the number of template arguments. 3229 unsigned getNumArgs() const { return NumArgs; } 3230 3231 /// \brief Retrieve a specific template argument as a type. 3232 /// \precondition @c isArgType(Arg) 3233 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3234 3235 bool isSugared() const { 3236 return !isDependentType() || isCurrentInstantiation(); 3237 } 3238 QualType desugar() const { return getCanonicalTypeInternal(); } 3239 3240 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3241 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3242 } 3243 3244 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3245 const TemplateArgument *Args, 3246 unsigned NumArgs, 3247 const ASTContext &Context); 3248 3249 static bool classof(const Type *T) { 3250 return T->getTypeClass() == TemplateSpecialization; 3251 } 3252 static bool classof(const TemplateSpecializationType *T) { return true; } 3253}; 3254 3255/// \brief The injected class name of a C++ class template or class 3256/// template partial specialization. Used to record that a type was 3257/// spelled with a bare identifier rather than as a template-id; the 3258/// equivalent for non-templated classes is just RecordType. 3259/// 3260/// Injected class name types are always dependent. Template 3261/// instantiation turns these into RecordTypes. 3262/// 3263/// Injected class name types are always canonical. This works 3264/// because it is impossible to compare an injected class name type 3265/// with the corresponding non-injected template type, for the same 3266/// reason that it is impossible to directly compare template 3267/// parameters from different dependent contexts: injected class name 3268/// types can only occur within the scope of a particular templated 3269/// declaration, and within that scope every template specialization 3270/// will canonicalize to the injected class name (when appropriate 3271/// according to the rules of the language). 3272class InjectedClassNameType : public Type { 3273 CXXRecordDecl *Decl; 3274 3275 /// The template specialization which this type represents. 3276 /// For example, in 3277 /// template <class T> class A { ... }; 3278 /// this is A<T>, whereas in 3279 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3280 /// this is A<B<X,Y> >. 3281 /// 3282 /// It is always unqualified, always a template specialization type, 3283 /// and always dependent. 3284 QualType InjectedType; 3285 3286 friend class ASTContext; // ASTContext creates these. 3287 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3288 // currently suitable for AST reading, too much 3289 // interdependencies. 3290 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3291 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3292 /*VariablyModified=*/false, 3293 /*ContainsUnexpandedParameterPack=*/false), 3294 Decl(D), InjectedType(TST) { 3295 assert(isa<TemplateSpecializationType>(TST)); 3296 assert(!TST.hasQualifiers()); 3297 assert(TST->isDependentType()); 3298 } 3299 3300public: 3301 QualType getInjectedSpecializationType() const { return InjectedType; } 3302 const TemplateSpecializationType *getInjectedTST() const { 3303 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3304 } 3305 3306 CXXRecordDecl *getDecl() const; 3307 3308 bool isSugared() const { return false; } 3309 QualType desugar() const { return QualType(this, 0); } 3310 3311 static bool classof(const Type *T) { 3312 return T->getTypeClass() == InjectedClassName; 3313 } 3314 static bool classof(const InjectedClassNameType *T) { return true; } 3315}; 3316 3317/// \brief The kind of a tag type. 3318enum TagTypeKind { 3319 /// \brief The "struct" keyword. 3320 TTK_Struct, 3321 /// \brief The "union" keyword. 3322 TTK_Union, 3323 /// \brief The "class" keyword. 3324 TTK_Class, 3325 /// \brief The "enum" keyword. 3326 TTK_Enum 3327}; 3328 3329/// \brief The elaboration keyword that precedes a qualified type name or 3330/// introduces an elaborated-type-specifier. 3331enum ElaboratedTypeKeyword { 3332 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3333 ETK_Struct, 3334 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3335 ETK_Union, 3336 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3337 ETK_Class, 3338 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3339 ETK_Enum, 3340 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3341 /// \c typename T::type. 3342 ETK_Typename, 3343 /// \brief No keyword precedes the qualified type name. 3344 ETK_None 3345}; 3346 3347/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3348/// The keyword in stored in the free bits of the base class. 3349/// Also provides a few static helpers for converting and printing 3350/// elaborated type keyword and tag type kind enumerations. 3351class TypeWithKeyword : public Type { 3352protected: 3353 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3354 QualType Canonical, bool Dependent, bool VariablyModified, 3355 bool ContainsUnexpandedParameterPack) 3356 : Type(tc, Canonical, Dependent, VariablyModified, 3357 ContainsUnexpandedParameterPack) { 3358 TypeWithKeywordBits.Keyword = Keyword; 3359 } 3360 3361public: 3362 ElaboratedTypeKeyword getKeyword() const { 3363 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3364 } 3365 3366 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3367 /// into an elaborated type keyword. 3368 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3369 3370 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3371 /// into a tag type kind. It is an error to provide a type specifier 3372 /// which *isn't* a tag kind here. 3373 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3374 3375 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3376 /// elaborated type keyword. 3377 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3378 3379 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3380 // a TagTypeKind. It is an error to provide an elaborated type keyword 3381 /// which *isn't* a tag kind here. 3382 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3383 3384 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3385 3386 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3387 3388 static const char *getTagTypeKindName(TagTypeKind Kind) { 3389 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3390 } 3391 3392 class CannotCastToThisType {}; 3393 static CannotCastToThisType classof(const Type *); 3394}; 3395 3396/// \brief Represents a type that was referred to using an elaborated type 3397/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3398/// or both. 3399/// 3400/// This type is used to keep track of a type name as written in the 3401/// source code, including tag keywords and any nested-name-specifiers. 3402/// The type itself is always "sugar", used to express what was written 3403/// in the source code but containing no additional semantic information. 3404class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3405 3406 /// \brief The nested name specifier containing the qualifier. 3407 NestedNameSpecifier *NNS; 3408 3409 /// \brief The type that this qualified name refers to. 3410 QualType NamedType; 3411 3412 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3413 QualType NamedType, QualType CanonType) 3414 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3415 NamedType->isDependentType(), 3416 NamedType->isVariablyModifiedType(), 3417 NamedType->containsUnexpandedParameterPack()), 3418 NNS(NNS), NamedType(NamedType) { 3419 assert(!(Keyword == ETK_None && NNS == 0) && 3420 "ElaboratedType cannot have elaborated type keyword " 3421 "and name qualifier both null."); 3422 } 3423 3424 friend class ASTContext; // ASTContext creates these 3425 3426public: 3427 ~ElaboratedType(); 3428 3429 /// \brief Retrieve the qualification on this type. 3430 NestedNameSpecifier *getQualifier() const { return NNS; } 3431 3432 /// \brief Retrieve the type named by the qualified-id. 3433 QualType getNamedType() const { return NamedType; } 3434 3435 /// \brief Remove a single level of sugar. 3436 QualType desugar() const { return getNamedType(); } 3437 3438 /// \brief Returns whether this type directly provides sugar. 3439 bool isSugared() const { return true; } 3440 3441 void Profile(llvm::FoldingSetNodeID &ID) { 3442 Profile(ID, getKeyword(), NNS, NamedType); 3443 } 3444 3445 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3446 NestedNameSpecifier *NNS, QualType NamedType) { 3447 ID.AddInteger(Keyword); 3448 ID.AddPointer(NNS); 3449 NamedType.Profile(ID); 3450 } 3451 3452 static bool classof(const Type *T) { 3453 return T->getTypeClass() == Elaborated; 3454 } 3455 static bool classof(const ElaboratedType *T) { return true; } 3456}; 3457 3458/// \brief Represents a qualified type name for which the type name is 3459/// dependent. 3460/// 3461/// DependentNameType represents a class of dependent types that involve a 3462/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3463/// name of a type. The DependentNameType may start with a "typename" (for a 3464/// typename-specifier), "class", "struct", "union", or "enum" (for a 3465/// dependent elaborated-type-specifier), or nothing (in contexts where we 3466/// know that we must be referring to a type, e.g., in a base class specifier). 3467class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3468 3469 /// \brief The nested name specifier containing the qualifier. 3470 NestedNameSpecifier *NNS; 3471 3472 /// \brief The type that this typename specifier refers to. 3473 const IdentifierInfo *Name; 3474 3475 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3476 const IdentifierInfo *Name, QualType CanonType) 3477 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3478 /*VariablyModified=*/false, 3479 NNS->containsUnexpandedParameterPack()), 3480 NNS(NNS), Name(Name) { 3481 assert(NNS->isDependent() && 3482 "DependentNameType requires a dependent nested-name-specifier"); 3483 } 3484 3485 friend class ASTContext; // ASTContext creates these 3486 3487public: 3488 /// \brief Retrieve the qualification on this type. 3489 NestedNameSpecifier *getQualifier() const { return NNS; } 3490 3491 /// \brief Retrieve the type named by the typename specifier as an 3492 /// identifier. 3493 /// 3494 /// This routine will return a non-NULL identifier pointer when the 3495 /// form of the original typename was terminated by an identifier, 3496 /// e.g., "typename T::type". 3497 const IdentifierInfo *getIdentifier() const { 3498 return Name; 3499 } 3500 3501 bool isSugared() const { return false; } 3502 QualType desugar() const { return QualType(this, 0); } 3503 3504 void Profile(llvm::FoldingSetNodeID &ID) { 3505 Profile(ID, getKeyword(), NNS, Name); 3506 } 3507 3508 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3509 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3510 ID.AddInteger(Keyword); 3511 ID.AddPointer(NNS); 3512 ID.AddPointer(Name); 3513 } 3514 3515 static bool classof(const Type *T) { 3516 return T->getTypeClass() == DependentName; 3517 } 3518 static bool classof(const DependentNameType *T) { return true; } 3519}; 3520 3521/// DependentTemplateSpecializationType - Represents a template 3522/// specialization type whose template cannot be resolved, e.g. 3523/// A<T>::template B<T> 3524class DependentTemplateSpecializationType : 3525 public TypeWithKeyword, public llvm::FoldingSetNode { 3526 3527 /// \brief The nested name specifier containing the qualifier. 3528 NestedNameSpecifier *NNS; 3529 3530 /// \brief The identifier of the template. 3531 const IdentifierInfo *Name; 3532 3533 /// \brief - The number of template arguments named in this class 3534 /// template specialization. 3535 unsigned NumArgs; 3536 3537 const TemplateArgument *getArgBuffer() const { 3538 return reinterpret_cast<const TemplateArgument*>(this+1); 3539 } 3540 TemplateArgument *getArgBuffer() { 3541 return reinterpret_cast<TemplateArgument*>(this+1); 3542 } 3543 3544 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3545 NestedNameSpecifier *NNS, 3546 const IdentifierInfo *Name, 3547 unsigned NumArgs, 3548 const TemplateArgument *Args, 3549 QualType Canon); 3550 3551 friend class ASTContext; // ASTContext creates these 3552 3553public: 3554 NestedNameSpecifier *getQualifier() const { return NNS; } 3555 const IdentifierInfo *getIdentifier() const { return Name; } 3556 3557 /// \brief Retrieve the template arguments. 3558 const TemplateArgument *getArgs() const { 3559 return getArgBuffer(); 3560 } 3561 3562 /// \brief Retrieve the number of template arguments. 3563 unsigned getNumArgs() const { return NumArgs; } 3564 3565 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3566 3567 typedef const TemplateArgument * iterator; 3568 iterator begin() const { return getArgs(); } 3569 iterator end() const; // inline in TemplateBase.h 3570 3571 bool isSugared() const { return false; } 3572 QualType desugar() const { return QualType(this, 0); } 3573 3574 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3575 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3576 } 3577 3578 static void Profile(llvm::FoldingSetNodeID &ID, 3579 const ASTContext &Context, 3580 ElaboratedTypeKeyword Keyword, 3581 NestedNameSpecifier *Qualifier, 3582 const IdentifierInfo *Name, 3583 unsigned NumArgs, 3584 const TemplateArgument *Args); 3585 3586 static bool classof(const Type *T) { 3587 return T->getTypeClass() == DependentTemplateSpecialization; 3588 } 3589 static bool classof(const DependentTemplateSpecializationType *T) { 3590 return true; 3591 } 3592}; 3593 3594/// \brief Represents a pack expansion of types. 3595/// 3596/// Pack expansions are part of C++0x variadic templates. A pack 3597/// expansion contains a pattern, which itself contains one or more 3598/// "unexpanded" parameter packs. When instantiated, a pack expansion 3599/// produces a series of types, each instantiated from the pattern of 3600/// the expansion, where the Ith instantiation of the pattern uses the 3601/// Ith arguments bound to each of the unexpanded parameter packs. The 3602/// pack expansion is considered to "expand" these unexpanded 3603/// parameter packs. 3604/// 3605/// \code 3606/// template<typename ...Types> struct tuple; 3607/// 3608/// template<typename ...Types> 3609/// struct tuple_of_references { 3610/// typedef tuple<Types&...> type; 3611/// }; 3612/// \endcode 3613/// 3614/// Here, the pack expansion \c Types&... is represented via a 3615/// PackExpansionType whose pattern is Types&. 3616class PackExpansionType : public Type, public llvm::FoldingSetNode { 3617 /// \brief The pattern of the pack expansion. 3618 QualType Pattern; 3619 3620 /// \brief The number of expansions that this pack expansion will 3621 /// generate when substituted (+1), or indicates that 3622 /// 3623 /// This field will only have a non-zero value when some of the parameter 3624 /// packs that occur within the pattern have been substituted but others have 3625 /// not. 3626 unsigned NumExpansions; 3627 3628 PackExpansionType(QualType Pattern, QualType Canon, 3629 llvm::Optional<unsigned> NumExpansions) 3630 : Type(PackExpansion, Canon, /*Dependent=*/true, 3631 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3632 /*ContainsUnexpandedParameterPack=*/false), 3633 Pattern(Pattern), 3634 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3635 3636 friend class ASTContext; // ASTContext creates these 3637 3638public: 3639 /// \brief Retrieve the pattern of this pack expansion, which is the 3640 /// type that will be repeatedly instantiated when instantiating the 3641 /// pack expansion itself. 3642 QualType getPattern() const { return Pattern; } 3643 3644 /// \brief Retrieve the number of expansions that this pack expansion will 3645 /// generate, if known. 3646 llvm::Optional<unsigned> getNumExpansions() const { 3647 if (NumExpansions) 3648 return NumExpansions - 1; 3649 3650 return llvm::Optional<unsigned>(); 3651 } 3652 3653 bool isSugared() const { return false; } 3654 QualType desugar() const { return QualType(this, 0); } 3655 3656 void Profile(llvm::FoldingSetNodeID &ID) { 3657 Profile(ID, getPattern(), getNumExpansions()); 3658 } 3659 3660 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3661 llvm::Optional<unsigned> NumExpansions) { 3662 ID.AddPointer(Pattern.getAsOpaquePtr()); 3663 ID.AddBoolean(NumExpansions); 3664 if (NumExpansions) 3665 ID.AddInteger(*NumExpansions); 3666 } 3667 3668 static bool classof(const Type *T) { 3669 return T->getTypeClass() == PackExpansion; 3670 } 3671 static bool classof(const PackExpansionType *T) { 3672 return true; 3673 } 3674}; 3675 3676/// ObjCObjectType - Represents a class type in Objective C. 3677/// Every Objective C type is a combination of a base type and a 3678/// list of protocols. 3679/// 3680/// Given the following declarations: 3681/// @class C; 3682/// @protocol P; 3683/// 3684/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3685/// with base C and no protocols. 3686/// 3687/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3688/// 3689/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3690/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3691/// and no protocols. 3692/// 3693/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3694/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3695/// this should get its own sugar class to better represent the source. 3696class ObjCObjectType : public Type { 3697 // ObjCObjectType.NumProtocols - the number of protocols stored 3698 // after the ObjCObjectPointerType node. 3699 // 3700 // These protocols are those written directly on the type. If 3701 // protocol qualifiers ever become additive, the iterators will need 3702 // to get kindof complicated. 3703 // 3704 // In the canonical object type, these are sorted alphabetically 3705 // and uniqued. 3706 3707 /// Either a BuiltinType or an InterfaceType or sugar for either. 3708 QualType BaseType; 3709 3710 ObjCProtocolDecl * const *getProtocolStorage() const { 3711 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3712 } 3713 3714 ObjCProtocolDecl **getProtocolStorage(); 3715 3716protected: 3717 ObjCObjectType(QualType Canonical, QualType Base, 3718 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3719 3720 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3721 ObjCObjectType(enum Nonce_ObjCInterface) 3722 : Type(ObjCInterface, QualType(), false, false, false), 3723 BaseType(QualType(this_(), 0)) { 3724 ObjCObjectTypeBits.NumProtocols = 0; 3725 } 3726 3727public: 3728 /// getBaseType - Gets the base type of this object type. This is 3729 /// always (possibly sugar for) one of: 3730 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3731 /// user, which is a typedef for an ObjCPointerType) 3732 /// - the 'Class' builtin type (same caveat) 3733 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3734 QualType getBaseType() const { return BaseType; } 3735 3736 bool isObjCId() const { 3737 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3738 } 3739 bool isObjCClass() const { 3740 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3741 } 3742 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3743 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3744 bool isObjCUnqualifiedIdOrClass() const { 3745 if (!qual_empty()) return false; 3746 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3747 return T->getKind() == BuiltinType::ObjCId || 3748 T->getKind() == BuiltinType::ObjCClass; 3749 return false; 3750 } 3751 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3752 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3753 3754 /// Gets the interface declaration for this object type, if the base type 3755 /// really is an interface. 3756 ObjCInterfaceDecl *getInterface() const; 3757 3758 typedef ObjCProtocolDecl * const *qual_iterator; 3759 3760 qual_iterator qual_begin() const { return getProtocolStorage(); } 3761 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3762 3763 bool qual_empty() const { return getNumProtocols() == 0; } 3764 3765 /// getNumProtocols - Return the number of qualifying protocols in this 3766 /// interface type, or 0 if there are none. 3767 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3768 3769 /// \brief Fetch a protocol by index. 3770 ObjCProtocolDecl *getProtocol(unsigned I) const { 3771 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3772 return qual_begin()[I]; 3773 } 3774 3775 bool isSugared() const { return false; } 3776 QualType desugar() const { return QualType(this, 0); } 3777 3778 static bool classof(const Type *T) { 3779 return T->getTypeClass() == ObjCObject || 3780 T->getTypeClass() == ObjCInterface; 3781 } 3782 static bool classof(const ObjCObjectType *) { return true; } 3783}; 3784 3785/// ObjCObjectTypeImpl - A class providing a concrete implementation 3786/// of ObjCObjectType, so as to not increase the footprint of 3787/// ObjCInterfaceType. Code outside of ASTContext and the core type 3788/// system should not reference this type. 3789class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3790 friend class ASTContext; 3791 3792 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3793 // will need to be modified. 3794 3795 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3796 ObjCProtocolDecl * const *Protocols, 3797 unsigned NumProtocols) 3798 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3799 3800public: 3801 void Profile(llvm::FoldingSetNodeID &ID); 3802 static void Profile(llvm::FoldingSetNodeID &ID, 3803 QualType Base, 3804 ObjCProtocolDecl *const *protocols, 3805 unsigned NumProtocols); 3806}; 3807 3808inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3809 return reinterpret_cast<ObjCProtocolDecl**>( 3810 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3811} 3812 3813/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3814/// object oriented design. They basically correspond to C++ classes. There 3815/// are two kinds of interface types, normal interfaces like "NSString" and 3816/// qualified interfaces, which are qualified with a protocol list like 3817/// "NSString<NSCopyable, NSAmazing>". 3818/// 3819/// ObjCInterfaceType guarantees the following properties when considered 3820/// as a subtype of its superclass, ObjCObjectType: 3821/// - There are no protocol qualifiers. To reinforce this, code which 3822/// tries to invoke the protocol methods via an ObjCInterfaceType will 3823/// fail to compile. 3824/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3825/// T->getBaseType() == QualType(T, 0). 3826class ObjCInterfaceType : public ObjCObjectType { 3827 ObjCInterfaceDecl *Decl; 3828 3829 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3830 : ObjCObjectType(Nonce_ObjCInterface), 3831 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3832 friend class ASTContext; // ASTContext creates these. 3833 3834public: 3835 /// getDecl - Get the declaration of this interface. 3836 ObjCInterfaceDecl *getDecl() const { return Decl; } 3837 3838 bool isSugared() const { return false; } 3839 QualType desugar() const { return QualType(this, 0); } 3840 3841 static bool classof(const Type *T) { 3842 return T->getTypeClass() == ObjCInterface; 3843 } 3844 static bool classof(const ObjCInterfaceType *) { return true; } 3845 3846 // Nonsense to "hide" certain members of ObjCObjectType within this 3847 // class. People asking for protocols on an ObjCInterfaceType are 3848 // not going to get what they want: ObjCInterfaceTypes are 3849 // guaranteed to have no protocols. 3850 enum { 3851 qual_iterator, 3852 qual_begin, 3853 qual_end, 3854 getNumProtocols, 3855 getProtocol 3856 }; 3857}; 3858 3859inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3860 if (const ObjCInterfaceType *T = 3861 getBaseType()->getAs<ObjCInterfaceType>()) 3862 return T->getDecl(); 3863 return 0; 3864} 3865 3866/// ObjCObjectPointerType - Used to represent a pointer to an 3867/// Objective C object. These are constructed from pointer 3868/// declarators when the pointee type is an ObjCObjectType (or sugar 3869/// for one). In addition, the 'id' and 'Class' types are typedefs 3870/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3871/// are translated into these. 3872/// 3873/// Pointers to pointers to Objective C objects are still PointerTypes; 3874/// only the first level of pointer gets it own type implementation. 3875class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3876 QualType PointeeType; 3877 3878 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3879 : Type(ObjCObjectPointer, Canonical, false, false, false), 3880 PointeeType(Pointee) {} 3881 friend class ASTContext; // ASTContext creates these. 3882 3883public: 3884 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3885 /// The result will always be an ObjCObjectType or sugar thereof. 3886 QualType getPointeeType() const { return PointeeType; } 3887 3888 /// getObjCObjectType - Gets the type pointed to by this ObjC 3889 /// pointer. This method always returns non-null. 3890 /// 3891 /// This method is equivalent to getPointeeType() except that 3892 /// it discards any typedefs (or other sugar) between this 3893 /// type and the "outermost" object type. So for: 3894 /// @class A; @protocol P; @protocol Q; 3895 /// typedef A<P> AP; 3896 /// typedef A A1; 3897 /// typedef A1<P> A1P; 3898 /// typedef A1P<Q> A1PQ; 3899 /// For 'A*', getObjectType() will return 'A'. 3900 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3901 /// For 'AP*', getObjectType() will return 'A<P>'. 3902 /// For 'A1*', getObjectType() will return 'A'. 3903 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3904 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3905 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3906 /// adding protocols to a protocol-qualified base discards the 3907 /// old qualifiers (for now). But if it didn't, getObjectType() 3908 /// would return 'A1P<Q>' (and we'd have to make iterating over 3909 /// qualifiers more complicated). 3910 const ObjCObjectType *getObjectType() const { 3911 return PointeeType->castAs<ObjCObjectType>(); 3912 } 3913 3914 /// getInterfaceType - If this pointer points to an Objective C 3915 /// @interface type, gets the type for that interface. Any protocol 3916 /// qualifiers on the interface are ignored. 3917 /// 3918 /// \return null if the base type for this pointer is 'id' or 'Class' 3919 const ObjCInterfaceType *getInterfaceType() const { 3920 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3921 } 3922 3923 /// getInterfaceDecl - If this pointer points to an Objective @interface 3924 /// type, gets the declaration for that interface. 3925 /// 3926 /// \return null if the base type for this pointer is 'id' or 'Class' 3927 ObjCInterfaceDecl *getInterfaceDecl() const { 3928 return getObjectType()->getInterface(); 3929 } 3930 3931 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3932 /// its object type is the primitive 'id' type with no protocols. 3933 bool isObjCIdType() const { 3934 return getObjectType()->isObjCUnqualifiedId(); 3935 } 3936 3937 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3938 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3939 bool isObjCClassType() const { 3940 return getObjectType()->isObjCUnqualifiedClass(); 3941 } 3942 3943 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3944 /// non-empty set of protocols. 3945 bool isObjCQualifiedIdType() const { 3946 return getObjectType()->isObjCQualifiedId(); 3947 } 3948 3949 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3950 /// some non-empty set of protocols. 3951 bool isObjCQualifiedClassType() const { 3952 return getObjectType()->isObjCQualifiedClass(); 3953 } 3954 3955 /// An iterator over the qualifiers on the object type. Provided 3956 /// for convenience. This will always iterate over the full set of 3957 /// protocols on a type, not just those provided directly. 3958 typedef ObjCObjectType::qual_iterator qual_iterator; 3959 3960 qual_iterator qual_begin() const { 3961 return getObjectType()->qual_begin(); 3962 } 3963 qual_iterator qual_end() const { 3964 return getObjectType()->qual_end(); 3965 } 3966 bool qual_empty() const { return getObjectType()->qual_empty(); } 3967 3968 /// getNumProtocols - Return the number of qualifying protocols on 3969 /// the object type. 3970 unsigned getNumProtocols() const { 3971 return getObjectType()->getNumProtocols(); 3972 } 3973 3974 /// \brief Retrieve a qualifying protocol by index on the object 3975 /// type. 3976 ObjCProtocolDecl *getProtocol(unsigned I) const { 3977 return getObjectType()->getProtocol(I); 3978 } 3979 3980 bool isSugared() const { return false; } 3981 QualType desugar() const { return QualType(this, 0); } 3982 3983 void Profile(llvm::FoldingSetNodeID &ID) { 3984 Profile(ID, getPointeeType()); 3985 } 3986 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3987 ID.AddPointer(T.getAsOpaquePtr()); 3988 } 3989 static bool classof(const Type *T) { 3990 return T->getTypeClass() == ObjCObjectPointer; 3991 } 3992 static bool classof(const ObjCObjectPointerType *) { return true; } 3993}; 3994 3995/// A qualifier set is used to build a set of qualifiers. 3996class QualifierCollector : public Qualifiers { 3997public: 3998 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3999 4000 /// Collect any qualifiers on the given type and return an 4001 /// unqualified type. The qualifiers are assumed to be consistent 4002 /// with those already in the type. 4003 const Type *strip(QualType type) { 4004 addFastQualifiers(type.getLocalFastQualifiers()); 4005 if (!type.hasLocalNonFastQualifiers()) 4006 return type.getTypePtrUnsafe(); 4007 4008 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4009 addConsistentQualifiers(extQuals->getQualifiers()); 4010 return extQuals->getBaseType(); 4011 } 4012 4013 /// Apply the collected qualifiers to the given type. 4014 QualType apply(const ASTContext &Context, QualType QT) const; 4015 4016 /// Apply the collected qualifiers to the given type. 4017 QualType apply(const ASTContext &Context, const Type* T) const; 4018}; 4019 4020 4021// Inline function definitions. 4022 4023inline const Type *QualType::getTypePtr() const { 4024 return getCommonPtr()->BaseType; 4025} 4026 4027inline const Type *QualType::getTypePtrOrNull() const { 4028 return (isNull() ? 0 : getCommonPtr()->BaseType); 4029} 4030 4031inline SplitQualType QualType::split() const { 4032 if (!hasLocalNonFastQualifiers()) 4033 return SplitQualType(getTypePtrUnsafe(), 4034 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4035 4036 const ExtQuals *eq = getExtQualsUnsafe(); 4037 Qualifiers qs = eq->getQualifiers(); 4038 qs.addFastQualifiers(getLocalFastQualifiers()); 4039 return SplitQualType(eq->getBaseType(), qs); 4040} 4041 4042inline Qualifiers QualType::getLocalQualifiers() const { 4043 Qualifiers Quals; 4044 if (hasLocalNonFastQualifiers()) 4045 Quals = getExtQualsUnsafe()->getQualifiers(); 4046 Quals.addFastQualifiers(getLocalFastQualifiers()); 4047 return Quals; 4048} 4049 4050inline Qualifiers QualType::getQualifiers() const { 4051 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4052 quals.addFastQualifiers(getLocalFastQualifiers()); 4053 return quals; 4054} 4055 4056inline unsigned QualType::getCVRQualifiers() const { 4057 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4058 cvr |= getLocalCVRQualifiers(); 4059 return cvr; 4060} 4061 4062inline QualType QualType::getCanonicalType() const { 4063 QualType canon = getCommonPtr()->CanonicalType; 4064 return canon.withFastQualifiers(getLocalFastQualifiers()); 4065} 4066 4067inline bool QualType::isCanonical() const { 4068 return getTypePtr()->isCanonicalUnqualified(); 4069} 4070 4071inline bool QualType::isCanonicalAsParam() const { 4072 if (!isCanonical()) return false; 4073 if (hasLocalQualifiers()) return false; 4074 4075 const Type *T = getTypePtr(); 4076 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4077 return false; 4078 4079 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4080} 4081 4082inline bool QualType::isConstQualified() const { 4083 return isLocalConstQualified() || 4084 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4085} 4086 4087inline bool QualType::isRestrictQualified() const { 4088 return isLocalRestrictQualified() || 4089 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4090} 4091 4092 4093inline bool QualType::isVolatileQualified() const { 4094 return isLocalVolatileQualified() || 4095 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4096} 4097 4098inline bool QualType::hasQualifiers() const { 4099 return hasLocalQualifiers() || 4100 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4101} 4102 4103inline QualType QualType::getUnqualifiedType() const { 4104 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4105 return QualType(getTypePtr(), 0); 4106 4107 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4108} 4109 4110inline SplitQualType QualType::getSplitUnqualifiedType() const { 4111 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4112 return split(); 4113 4114 return getSplitUnqualifiedTypeImpl(*this); 4115} 4116 4117inline void QualType::removeLocalConst() { 4118 removeLocalFastQualifiers(Qualifiers::Const); 4119} 4120 4121inline void QualType::removeLocalRestrict() { 4122 removeLocalFastQualifiers(Qualifiers::Restrict); 4123} 4124 4125inline void QualType::removeLocalVolatile() { 4126 removeLocalFastQualifiers(Qualifiers::Volatile); 4127} 4128 4129inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4130 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4131 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4132 4133 // Fast path: we don't need to touch the slow qualifiers. 4134 removeLocalFastQualifiers(Mask); 4135} 4136 4137/// getAddressSpace - Return the address space of this type. 4138inline unsigned QualType::getAddressSpace() const { 4139 return getQualifiers().getAddressSpace(); 4140} 4141 4142/// getObjCGCAttr - Return the gc attribute of this type. 4143inline Qualifiers::GC QualType::getObjCGCAttr() const { 4144 return getQualifiers().getObjCGCAttr(); 4145} 4146 4147inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4148 if (const PointerType *PT = t.getAs<PointerType>()) { 4149 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4150 return FT->getExtInfo(); 4151 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4152 return FT->getExtInfo(); 4153 4154 return FunctionType::ExtInfo(); 4155} 4156 4157inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4158 return getFunctionExtInfo(*t); 4159} 4160 4161/// isMoreQualifiedThan - Determine whether this type is more 4162/// qualified than the Other type. For example, "const volatile int" 4163/// is more qualified than "const int", "volatile int", and 4164/// "int". However, it is not more qualified than "const volatile 4165/// int". 4166inline bool QualType::isMoreQualifiedThan(QualType other) const { 4167 Qualifiers myQuals = getQualifiers(); 4168 Qualifiers otherQuals = other.getQualifiers(); 4169 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4170} 4171 4172/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4173/// as qualified as the Other type. For example, "const volatile 4174/// int" is at least as qualified as "const int", "volatile int", 4175/// "int", and "const volatile int". 4176inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4177 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4178} 4179 4180/// getNonReferenceType - If Type is a reference type (e.g., const 4181/// int&), returns the type that the reference refers to ("const 4182/// int"). Otherwise, returns the type itself. This routine is used 4183/// throughout Sema to implement C++ 5p6: 4184/// 4185/// If an expression initially has the type "reference to T" (8.3.2, 4186/// 8.5.3), the type is adjusted to "T" prior to any further 4187/// analysis, the expression designates the object or function 4188/// denoted by the reference, and the expression is an lvalue. 4189inline QualType QualType::getNonReferenceType() const { 4190 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4191 return RefType->getPointeeType(); 4192 else 4193 return *this; 4194} 4195 4196inline bool Type::isFunctionType() const { 4197 return isa<FunctionType>(CanonicalType); 4198} 4199inline bool Type::isPointerType() const { 4200 return isa<PointerType>(CanonicalType); 4201} 4202inline bool Type::isAnyPointerType() const { 4203 return isPointerType() || isObjCObjectPointerType(); 4204} 4205inline bool Type::isBlockPointerType() const { 4206 return isa<BlockPointerType>(CanonicalType); 4207} 4208inline bool Type::isReferenceType() const { 4209 return isa<ReferenceType>(CanonicalType); 4210} 4211inline bool Type::isLValueReferenceType() const { 4212 return isa<LValueReferenceType>(CanonicalType); 4213} 4214inline bool Type::isRValueReferenceType() const { 4215 return isa<RValueReferenceType>(CanonicalType); 4216} 4217inline bool Type::isFunctionPointerType() const { 4218 if (const PointerType *T = getAs<PointerType>()) 4219 return T->getPointeeType()->isFunctionType(); 4220 else 4221 return false; 4222} 4223inline bool Type::isMemberPointerType() const { 4224 return isa<MemberPointerType>(CanonicalType); 4225} 4226inline bool Type::isMemberFunctionPointerType() const { 4227 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4228 return T->isMemberFunctionPointer(); 4229 else 4230 return false; 4231} 4232inline bool Type::isMemberDataPointerType() const { 4233 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4234 return T->isMemberDataPointer(); 4235 else 4236 return false; 4237} 4238inline bool Type::isArrayType() const { 4239 return isa<ArrayType>(CanonicalType); 4240} 4241inline bool Type::isConstantArrayType() const { 4242 return isa<ConstantArrayType>(CanonicalType); 4243} 4244inline bool Type::isIncompleteArrayType() const { 4245 return isa<IncompleteArrayType>(CanonicalType); 4246} 4247inline bool Type::isVariableArrayType() const { 4248 return isa<VariableArrayType>(CanonicalType); 4249} 4250inline bool Type::isDependentSizedArrayType() const { 4251 return isa<DependentSizedArrayType>(CanonicalType); 4252} 4253inline bool Type::isBuiltinType() const { 4254 return isa<BuiltinType>(CanonicalType); 4255} 4256inline bool Type::isRecordType() const { 4257 return isa<RecordType>(CanonicalType); 4258} 4259inline bool Type::isEnumeralType() const { 4260 return isa<EnumType>(CanonicalType); 4261} 4262inline bool Type::isAnyComplexType() const { 4263 return isa<ComplexType>(CanonicalType); 4264} 4265inline bool Type::isVectorType() const { 4266 return isa<VectorType>(CanonicalType); 4267} 4268inline bool Type::isExtVectorType() const { 4269 return isa<ExtVectorType>(CanonicalType); 4270} 4271inline bool Type::isObjCObjectPointerType() const { 4272 return isa<ObjCObjectPointerType>(CanonicalType); 4273} 4274inline bool Type::isObjCObjectType() const { 4275 return isa<ObjCObjectType>(CanonicalType); 4276} 4277inline bool Type::isObjCObjectOrInterfaceType() const { 4278 return isa<ObjCInterfaceType>(CanonicalType) || 4279 isa<ObjCObjectType>(CanonicalType); 4280} 4281 4282inline bool Type::isObjCQualifiedIdType() const { 4283 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4284 return OPT->isObjCQualifiedIdType(); 4285 return false; 4286} 4287inline bool Type::isObjCQualifiedClassType() const { 4288 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4289 return OPT->isObjCQualifiedClassType(); 4290 return false; 4291} 4292inline bool Type::isObjCIdType() const { 4293 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4294 return OPT->isObjCIdType(); 4295 return false; 4296} 4297inline bool Type::isObjCClassType() const { 4298 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4299 return OPT->isObjCClassType(); 4300 return false; 4301} 4302inline bool Type::isObjCSelType() const { 4303 if (const PointerType *OPT = getAs<PointerType>()) 4304 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4305 return false; 4306} 4307inline bool Type::isObjCBuiltinType() const { 4308 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4309} 4310inline bool Type::isTemplateTypeParmType() const { 4311 return isa<TemplateTypeParmType>(CanonicalType); 4312} 4313 4314inline bool Type::isSpecificBuiltinType(unsigned K) const { 4315 if (const BuiltinType *BT = getAs<BuiltinType>()) 4316 if (BT->getKind() == (BuiltinType::Kind) K) 4317 return true; 4318 return false; 4319} 4320 4321inline bool Type::isPlaceholderType() const { 4322 if (const BuiltinType *BT = getAs<BuiltinType>()) 4323 return BT->isPlaceholderType(); 4324 return false; 4325} 4326 4327inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4328 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4329 return (BT->getKind() == (BuiltinType::Kind) K); 4330 return false; 4331} 4332 4333/// \brief Determines whether this is a type for which one can define 4334/// an overloaded operator. 4335inline bool Type::isOverloadableType() const { 4336 return isDependentType() || isRecordType() || isEnumeralType(); 4337} 4338 4339inline bool Type::hasPointerRepresentation() const { 4340 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4341 isObjCObjectPointerType() || isNullPtrType()); 4342} 4343 4344inline bool Type::hasObjCPointerRepresentation() const { 4345 return isObjCObjectPointerType(); 4346} 4347 4348inline const Type *Type::getBaseElementTypeUnsafe() const { 4349 const Type *type = this; 4350 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4351 type = arrayType->getElementType().getTypePtr(); 4352 return type; 4353} 4354 4355/// Insertion operator for diagnostics. This allows sending QualType's into a 4356/// diagnostic with <<. 4357inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4358 QualType T) { 4359 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4360 Diagnostic::ak_qualtype); 4361 return DB; 4362} 4363 4364/// Insertion operator for partial diagnostics. This allows sending QualType's 4365/// into a diagnostic with <<. 4366inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4367 QualType T) { 4368 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4369 Diagnostic::ak_qualtype); 4370 return PD; 4371} 4372 4373// Helper class template that is used by Type::getAs to ensure that one does 4374// not try to look through a qualified type to get to an array type. 4375template<typename T, 4376 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4377 llvm::is_base_of<ArrayType, T>::value)> 4378struct ArrayType_cannot_be_used_with_getAs { }; 4379 4380template<typename T> 4381struct ArrayType_cannot_be_used_with_getAs<T, true>; 4382 4383/// Member-template getAs<specific type>'. 4384template <typename T> const T *Type::getAs() const { 4385 ArrayType_cannot_be_used_with_getAs<T> at; 4386 (void)at; 4387 4388 // If this is directly a T type, return it. 4389 if (const T *Ty = dyn_cast<T>(this)) 4390 return Ty; 4391 4392 // If the canonical form of this type isn't the right kind, reject it. 4393 if (!isa<T>(CanonicalType)) 4394 return 0; 4395 4396 // If this is a typedef for the type, strip the typedef off without 4397 // losing all typedef information. 4398 return cast<T>(getUnqualifiedDesugaredType()); 4399} 4400 4401inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4402 // If this is directly an array type, return it. 4403 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4404 return arr; 4405 4406 // If the canonical form of this type isn't the right kind, reject it. 4407 if (!isa<ArrayType>(CanonicalType)) 4408 return 0; 4409 4410 // If this is a typedef for the type, strip the typedef off without 4411 // losing all typedef information. 4412 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4413} 4414 4415template <typename T> const T *Type::castAs() const { 4416 ArrayType_cannot_be_used_with_getAs<T> at; 4417 (void) at; 4418 4419 assert(isa<T>(CanonicalType)); 4420 if (const T *ty = dyn_cast<T>(this)) return ty; 4421 return cast<T>(getUnqualifiedDesugaredType()); 4422} 4423 4424inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4425 assert(isa<ArrayType>(CanonicalType)); 4426 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4427 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4428} 4429 4430} // end namespace clang 4431 4432#endif 4433