Type.h revision 43c9791207a2bd7cef8b17e9bfc4dd87db21690f
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 return 298 // Address spaces must match exactly. 299 getAddressSpace() == other.getAddressSpace() && 300 // ObjC GC qualifiers can match, be added, or be removed, but can't be 301 // changed. 302 (getObjCGCAttr() == other.getObjCGCAttr() || 303 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 304 // CVR qualifiers may subset. 305 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 306 } 307 308 /// \brief Determine whether this set of qualifiers is a strict superset of 309 /// another set of qualifiers, not considering qualifier compatibility. 310 bool isStrictSupersetOf(Qualifiers Other) const; 311 312 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 313 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 314 315 operator bool() const { return hasQualifiers(); } 316 317 Qualifiers &operator+=(Qualifiers R) { 318 addQualifiers(R); 319 return *this; 320 } 321 322 // Union two qualifier sets. If an enumerated qualifier appears 323 // in both sets, use the one from the right. 324 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 325 L += R; 326 return L; 327 } 328 329 Qualifiers &operator-=(Qualifiers R) { 330 Mask = Mask & ~(R.Mask); 331 return *this; 332 } 333 334 /// \brief Compute the difference between two qualifier sets. 335 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 336 L -= R; 337 return L; 338 } 339 340 std::string getAsString() const; 341 std::string getAsString(const PrintingPolicy &Policy) const { 342 std::string Buffer; 343 getAsStringInternal(Buffer, Policy); 344 return Buffer; 345 } 346 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 347 348 void Profile(llvm::FoldingSetNodeID &ID) const { 349 ID.AddInteger(Mask); 350 } 351 352private: 353 354 // bits: |0 1 2|3 .. 4|5 .. 31| 355 // |C R V|GCAttr|AddrSpace| 356 uint32_t Mask; 357 358 static const uint32_t GCAttrMask = 0x18; 359 static const uint32_t GCAttrShift = 3; 360 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 361 static const uint32_t AddressSpaceShift = 5; 362}; 363 364/// CallingConv - Specifies the calling convention that a function uses. 365enum CallingConv { 366 CC_Default, 367 CC_C, // __attribute__((cdecl)) 368 CC_X86StdCall, // __attribute__((stdcall)) 369 CC_X86FastCall, // __attribute__((fastcall)) 370 CC_X86ThisCall, // __attribute__((thiscall)) 371 CC_X86Pascal, // __attribute__((pascal)) 372 CC_AAPCS, // __attribute__((pcs("aapcs"))) 373 CC_AAPCS_VFP // __attribute__((pcs("aapcs-vfp"))) 374}; 375 376typedef std::pair<const Type*, Qualifiers> SplitQualType; 377 378/// QualType - For efficiency, we don't store CV-qualified types as nodes on 379/// their own: instead each reference to a type stores the qualifiers. This 380/// greatly reduces the number of nodes we need to allocate for types (for 381/// example we only need one for 'int', 'const int', 'volatile int', 382/// 'const volatile int', etc). 383/// 384/// As an added efficiency bonus, instead of making this a pair, we 385/// just store the two bits we care about in the low bits of the 386/// pointer. To handle the packing/unpacking, we make QualType be a 387/// simple wrapper class that acts like a smart pointer. A third bit 388/// indicates whether there are extended qualifiers present, in which 389/// case the pointer points to a special structure. 390class QualType { 391 // Thankfully, these are efficiently composable. 392 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 393 Qualifiers::FastWidth> Value; 394 395 const ExtQuals *getExtQualsUnsafe() const { 396 return Value.getPointer().get<const ExtQuals*>(); 397 } 398 399 const Type *getTypePtrUnsafe() const { 400 return Value.getPointer().get<const Type*>(); 401 } 402 403 const ExtQualsTypeCommonBase *getCommonPtr() const { 404 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 405 uintptr_t CommonPtrVal 406 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 407 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 408 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 409 } 410 411 friend class QualifierCollector; 412public: 413 QualType() {} 414 415 QualType(const Type *Ptr, unsigned Quals) 416 : Value(Ptr, Quals) {} 417 QualType(const ExtQuals *Ptr, unsigned Quals) 418 : Value(Ptr, Quals) {} 419 420 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 421 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 422 423 /// Retrieves a pointer to the underlying (unqualified) type. 424 /// This should really return a const Type, but it's not worth 425 /// changing all the users right now. 426 /// 427 /// This function requires that the type not be NULL. If the type might be 428 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 429 const Type *getTypePtr() const; 430 431 const Type *getTypePtrOrNull() const; 432 433 /// Divides a QualType into its unqualified type and a set of local 434 /// qualifiers. 435 SplitQualType split() const; 436 437 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 438 static QualType getFromOpaquePtr(const void *Ptr) { 439 QualType T; 440 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 441 return T; 442 } 443 444 const Type &operator*() const { 445 return *getTypePtr(); 446 } 447 448 const Type *operator->() const { 449 return getTypePtr(); 450 } 451 452 bool isCanonical() const; 453 bool isCanonicalAsParam() const; 454 455 /// isNull - Return true if this QualType doesn't point to a type yet. 456 bool isNull() const { 457 return Value.getPointer().isNull(); 458 } 459 460 /// \brief Determine whether this particular QualType instance has the 461 /// "const" qualifier set, without looking through typedefs that may have 462 /// added "const" at a different level. 463 bool isLocalConstQualified() const { 464 return (getLocalFastQualifiers() & Qualifiers::Const); 465 } 466 467 /// \brief Determine whether this type is const-qualified. 468 bool isConstQualified() const; 469 470 /// \brief Determine whether this particular QualType instance has the 471 /// "restrict" qualifier set, without looking through typedefs that may have 472 /// added "restrict" at a different level. 473 bool isLocalRestrictQualified() const { 474 return (getLocalFastQualifiers() & Qualifiers::Restrict); 475 } 476 477 /// \brief Determine whether this type is restrict-qualified. 478 bool isRestrictQualified() const; 479 480 /// \brief Determine whether this particular QualType instance has the 481 /// "volatile" qualifier set, without looking through typedefs that may have 482 /// added "volatile" at a different level. 483 bool isLocalVolatileQualified() const { 484 return (getLocalFastQualifiers() & Qualifiers::Volatile); 485 } 486 487 /// \brief Determine whether this type is volatile-qualified. 488 bool isVolatileQualified() const; 489 490 /// \brief Determine whether this particular QualType instance has any 491 /// qualifiers, without looking through any typedefs that might add 492 /// qualifiers at a different level. 493 bool hasLocalQualifiers() const { 494 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 495 } 496 497 /// \brief Determine whether this type has any qualifiers. 498 bool hasQualifiers() const; 499 500 /// \brief Determine whether this particular QualType instance has any 501 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 502 /// instance. 503 bool hasLocalNonFastQualifiers() const { 504 return Value.getPointer().is<const ExtQuals*>(); 505 } 506 507 /// \brief Retrieve the set of qualifiers local to this particular QualType 508 /// instance, not including any qualifiers acquired through typedefs or 509 /// other sugar. 510 Qualifiers getLocalQualifiers() const; 511 512 /// \brief Retrieve the set of qualifiers applied to this type. 513 Qualifiers getQualifiers() const; 514 515 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 516 /// local to this particular QualType instance, not including any qualifiers 517 /// acquired through typedefs or other sugar. 518 unsigned getLocalCVRQualifiers() const { 519 return getLocalFastQualifiers(); 520 } 521 522 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 523 /// applied to this type. 524 unsigned getCVRQualifiers() const; 525 526 bool isConstant(ASTContext& Ctx) const { 527 return QualType::isConstant(*this, Ctx); 528 } 529 530 // Don't promise in the API that anything besides 'const' can be 531 // easily added. 532 533 /// addConst - add the specified type qualifier to this QualType. 534 void addConst() { 535 addFastQualifiers(Qualifiers::Const); 536 } 537 QualType withConst() const { 538 return withFastQualifiers(Qualifiers::Const); 539 } 540 541 void addFastQualifiers(unsigned TQs) { 542 assert(!(TQs & ~Qualifiers::FastMask) 543 && "non-fast qualifier bits set in mask!"); 544 Value.setInt(Value.getInt() | TQs); 545 } 546 547 void removeLocalConst(); 548 void removeLocalVolatile(); 549 void removeLocalRestrict(); 550 void removeLocalCVRQualifiers(unsigned Mask); 551 552 void removeLocalFastQualifiers() { Value.setInt(0); } 553 void removeLocalFastQualifiers(unsigned Mask) { 554 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 555 Value.setInt(Value.getInt() & ~Mask); 556 } 557 558 // Creates a type with the given qualifiers in addition to any 559 // qualifiers already on this type. 560 QualType withFastQualifiers(unsigned TQs) const { 561 QualType T = *this; 562 T.addFastQualifiers(TQs); 563 return T; 564 } 565 566 // Creates a type with exactly the given fast qualifiers, removing 567 // any existing fast qualifiers. 568 QualType withExactLocalFastQualifiers(unsigned TQs) const { 569 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 570 } 571 572 // Removes fast qualifiers, but leaves any extended qualifiers in place. 573 QualType withoutLocalFastQualifiers() const { 574 QualType T = *this; 575 T.removeLocalFastQualifiers(); 576 return T; 577 } 578 579 QualType getCanonicalType() const; 580 581 /// \brief Return this type with all of the instance-specific qualifiers 582 /// removed, but without removing any qualifiers that may have been applied 583 /// through typedefs. 584 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 585 586 /// \brief Retrieve the unqualified variant of the given type, 587 /// removing as little sugar as possible. 588 /// 589 /// This routine looks through various kinds of sugar to find the 590 /// least-desugared type that is unqualified. For example, given: 591 /// 592 /// \code 593 /// typedef int Integer; 594 /// typedef const Integer CInteger; 595 /// typedef CInteger DifferenceType; 596 /// \endcode 597 /// 598 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 599 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 600 /// 601 /// The resulting type might still be qualified if it's an array 602 /// type. To strip qualifiers even from within an array type, use 603 /// ASTContext::getUnqualifiedArrayType. 604 inline QualType getUnqualifiedType() const; 605 606 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 607 /// given type, removing as little sugar as possible. 608 /// 609 /// Like getUnqualifiedType(), but also returns the set of 610 /// qualifiers that were built up. 611 /// 612 /// The resulting type might still be qualified if it's an array 613 /// type. To strip qualifiers even from within an array type, use 614 /// ASTContext::getUnqualifiedArrayType. 615 inline SplitQualType getSplitUnqualifiedType() const; 616 617 /// \brief Determine whether this type is more qualified than the other 618 /// given type, requiring exact equality for non-CVR qualifiers. 619 bool isMoreQualifiedThan(QualType Other) const; 620 621 /// \brief Determine whether this type is at least as qualified as the other 622 /// given type, requiring exact equality for non-CVR qualifiers. 623 bool isAtLeastAsQualifiedAs(QualType Other) const; 624 625 QualType getNonReferenceType() const; 626 627 /// \brief Determine the type of a (typically non-lvalue) expression with the 628 /// specified result type. 629 /// 630 /// This routine should be used for expressions for which the return type is 631 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 632 /// an lvalue. It removes a top-level reference (since there are no 633 /// expressions of reference type) and deletes top-level cvr-qualifiers 634 /// from non-class types (in C++) or all types (in C). 635 QualType getNonLValueExprType(ASTContext &Context) const; 636 637 /// getDesugaredType - Return the specified type with any "sugar" removed from 638 /// the type. This takes off typedefs, typeof's etc. If the outer level of 639 /// the type is already concrete, it returns it unmodified. This is similar 640 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 641 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 642 /// concrete. 643 /// 644 /// Qualifiers are left in place. 645 QualType getDesugaredType(const ASTContext &Context) const { 646 return getDesugaredType(*this, Context); 647 } 648 649 SplitQualType getSplitDesugaredType() const { 650 return getSplitDesugaredType(*this); 651 } 652 653 /// IgnoreParens - Returns the specified type after dropping any 654 /// outer-level parentheses. 655 QualType IgnoreParens() const { 656 if (isa<ParenType>(*this)) 657 return QualType::IgnoreParens(*this); 658 return *this; 659 } 660 661 /// operator==/!= - Indicate whether the specified types and qualifiers are 662 /// identical. 663 friend bool operator==(const QualType &LHS, const QualType &RHS) { 664 return LHS.Value == RHS.Value; 665 } 666 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 667 return LHS.Value != RHS.Value; 668 } 669 std::string getAsString() const { 670 return getAsString(split()); 671 } 672 static std::string getAsString(SplitQualType split) { 673 return getAsString(split.first, split.second); 674 } 675 static std::string getAsString(const Type *ty, Qualifiers qs); 676 677 std::string getAsString(const PrintingPolicy &Policy) const { 678 std::string S; 679 getAsStringInternal(S, Policy); 680 return S; 681 } 682 void getAsStringInternal(std::string &Str, 683 const PrintingPolicy &Policy) const { 684 return getAsStringInternal(split(), Str, Policy); 685 } 686 static void getAsStringInternal(SplitQualType split, std::string &out, 687 const PrintingPolicy &policy) { 688 return getAsStringInternal(split.first, split.second, out, policy); 689 } 690 static void getAsStringInternal(const Type *ty, Qualifiers qs, 691 std::string &out, 692 const PrintingPolicy &policy); 693 694 void dump(const char *s) const; 695 void dump() const; 696 697 void Profile(llvm::FoldingSetNodeID &ID) const { 698 ID.AddPointer(getAsOpaquePtr()); 699 } 700 701 /// getAddressSpace - Return the address space of this type. 702 inline unsigned getAddressSpace() const; 703 704 /// GCAttrTypesAttr - Returns gc attribute of this type. 705 inline Qualifiers::GC getObjCGCAttr() const; 706 707 /// isObjCGCWeak true when Type is objc's weak. 708 bool isObjCGCWeak() const { 709 return getObjCGCAttr() == Qualifiers::Weak; 710 } 711 712 /// isObjCGCStrong true when Type is objc's strong. 713 bool isObjCGCStrong() const { 714 return getObjCGCAttr() == Qualifiers::Strong; 715 } 716 717 enum DestructionKind { 718 DK_none, 719 DK_cxx_destructor 720 }; 721 722 /// isDestructedType - nonzero if objects of this type require 723 /// non-trivial work to clean up after. Non-zero because it's 724 /// conceivable that qualifiers (objc_gc(weak)?) could make 725 /// something require destruction. 726 DestructionKind isDestructedType() const { 727 return isDestructedTypeImpl(*this); 728 } 729 730private: 731 // These methods are implemented in a separate translation unit; 732 // "static"-ize them to avoid creating temporary QualTypes in the 733 // caller. 734 static bool isConstant(QualType T, ASTContext& Ctx); 735 static QualType getDesugaredType(QualType T, const ASTContext &Context); 736 static SplitQualType getSplitDesugaredType(QualType T); 737 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 738 static QualType IgnoreParens(QualType T); 739 static DestructionKind isDestructedTypeImpl(QualType type); 740}; 741 742} // end clang. 743 744namespace llvm { 745/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 746/// to a specific Type class. 747template<> struct simplify_type<const ::clang::QualType> { 748 typedef const ::clang::Type *SimpleType; 749 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 750 return Val.getTypePtr(); 751 } 752}; 753template<> struct simplify_type< ::clang::QualType> 754 : public simplify_type<const ::clang::QualType> {}; 755 756// Teach SmallPtrSet that QualType is "basically a pointer". 757template<> 758class PointerLikeTypeTraits<clang::QualType> { 759public: 760 static inline void *getAsVoidPointer(clang::QualType P) { 761 return P.getAsOpaquePtr(); 762 } 763 static inline clang::QualType getFromVoidPointer(void *P) { 764 return clang::QualType::getFromOpaquePtr(P); 765 } 766 // Various qualifiers go in low bits. 767 enum { NumLowBitsAvailable = 0 }; 768}; 769 770} // end namespace llvm 771 772namespace clang { 773 774/// \brief Base class that is common to both the \c ExtQuals and \c Type 775/// classes, which allows \c QualType to access the common fields between the 776/// two. 777/// 778class ExtQualsTypeCommonBase { 779 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 780 : BaseType(baseType), CanonicalType(canon) {} 781 782 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 783 /// a self-referential pointer (for \c Type). 784 /// 785 /// This pointer allows an efficient mapping from a QualType to its 786 /// underlying type pointer. 787 const Type *const BaseType; 788 789 /// \brief The canonical type of this type. A QualType. 790 QualType CanonicalType; 791 792 friend class QualType; 793 friend class Type; 794 friend class ExtQuals; 795}; 796 797/// ExtQuals - We can encode up to four bits in the low bits of a 798/// type pointer, but there are many more type qualifiers that we want 799/// to be able to apply to an arbitrary type. Therefore we have this 800/// struct, intended to be heap-allocated and used by QualType to 801/// store qualifiers. 802/// 803/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 804/// in three low bits on the QualType pointer; a fourth bit records whether 805/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 806/// Objective-C GC attributes) are much more rare. 807class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 808 // NOTE: changing the fast qualifiers should be straightforward as 809 // long as you don't make 'const' non-fast. 810 // 1. Qualifiers: 811 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 812 // Fast qualifiers must occupy the low-order bits. 813 // b) Update Qualifiers::FastWidth and FastMask. 814 // 2. QualType: 815 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 816 // b) Update remove{Volatile,Restrict}, defined near the end of 817 // this header. 818 // 3. ASTContext: 819 // a) Update get{Volatile,Restrict}Type. 820 821 /// Quals - the immutable set of qualifiers applied by this 822 /// node; always contains extended qualifiers. 823 Qualifiers Quals; 824 825 ExtQuals *this_() { return this; } 826 827public: 828 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 829 : ExtQualsTypeCommonBase(baseType, 830 canon.isNull() ? QualType(this_(), 0) : canon), 831 Quals(quals) 832 { 833 assert(Quals.hasNonFastQualifiers() 834 && "ExtQuals created with no fast qualifiers"); 835 assert(!Quals.hasFastQualifiers() 836 && "ExtQuals created with fast qualifiers"); 837 } 838 839 Qualifiers getQualifiers() const { return Quals; } 840 841 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 842 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 843 844 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 845 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 846 847 const Type *getBaseType() const { return BaseType; } 848 849public: 850 void Profile(llvm::FoldingSetNodeID &ID) const { 851 Profile(ID, getBaseType(), Quals); 852 } 853 static void Profile(llvm::FoldingSetNodeID &ID, 854 const Type *BaseType, 855 Qualifiers Quals) { 856 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 857 ID.AddPointer(BaseType); 858 Quals.Profile(ID); 859 } 860}; 861 862/// \brief The kind of C++0x ref-qualifier associated with a function type, 863/// which determines whether a member function's "this" object can be an 864/// lvalue, rvalue, or neither. 865enum RefQualifierKind { 866 /// \brief No ref-qualifier was provided. 867 RQ_None = 0, 868 /// \brief An lvalue ref-qualifier was provided (\c &). 869 RQ_LValue, 870 /// \brief An rvalue ref-qualifier was provided (\c &&). 871 RQ_RValue 872}; 873 874/// Type - This is the base class of the type hierarchy. A central concept 875/// with types is that each type always has a canonical type. A canonical type 876/// is the type with any typedef names stripped out of it or the types it 877/// references. For example, consider: 878/// 879/// typedef int foo; 880/// typedef foo* bar; 881/// 'int *' 'foo *' 'bar' 882/// 883/// There will be a Type object created for 'int'. Since int is canonical, its 884/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 885/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 886/// there is a PointerType that represents 'int*', which, like 'int', is 887/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 888/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 889/// is also 'int*'. 890/// 891/// Non-canonical types are useful for emitting diagnostics, without losing 892/// information about typedefs being used. Canonical types are useful for type 893/// comparisons (they allow by-pointer equality tests) and useful for reasoning 894/// about whether something has a particular form (e.g. is a function type), 895/// because they implicitly, recursively, strip all typedefs out of a type. 896/// 897/// Types, once created, are immutable. 898/// 899class Type : public ExtQualsTypeCommonBase { 900public: 901 enum TypeClass { 902#define TYPE(Class, Base) Class, 903#define LAST_TYPE(Class) TypeLast = Class, 904#define ABSTRACT_TYPE(Class, Base) 905#include "clang/AST/TypeNodes.def" 906 TagFirst = Record, TagLast = Enum 907 }; 908 909private: 910 Type(const Type&); // DO NOT IMPLEMENT. 911 void operator=(const Type&); // DO NOT IMPLEMENT. 912 913 /// Bitfields required by the Type class. 914 class TypeBitfields { 915 friend class Type; 916 template <class T> friend class TypePropertyCache; 917 918 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 919 unsigned TC : 8; 920 921 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 922 /// Note that this should stay at the end of the ivars for Type so that 923 /// subclasses can pack their bitfields into the same word. 924 unsigned Dependent : 1; 925 926 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 927 unsigned VariablyModified : 1; 928 929 /// \brief Whether this type contains an unexpanded parameter pack 930 /// (for C++0x variadic templates). 931 unsigned ContainsUnexpandedParameterPack : 1; 932 933 /// \brief Nonzero if the cache (i.e. the bitfields here starting 934 /// with 'Cache') is valid. If so, then this is a 935 /// LangOptions::VisibilityMode+1. 936 mutable unsigned CacheValidAndVisibility : 2; 937 938 /// \brief Linkage of this type. 939 mutable unsigned CachedLinkage : 2; 940 941 /// \brief Whether this type involves and local or unnamed types. 942 mutable unsigned CachedLocalOrUnnamed : 1; 943 944 /// \brief FromAST - Whether this type comes from an AST file. 945 mutable unsigned FromAST : 1; 946 947 bool isCacheValid() const { 948 return (CacheValidAndVisibility != 0); 949 } 950 Visibility getVisibility() const { 951 assert(isCacheValid() && "getting linkage from invalid cache"); 952 return static_cast<Visibility>(CacheValidAndVisibility-1); 953 } 954 Linkage getLinkage() const { 955 assert(isCacheValid() && "getting linkage from invalid cache"); 956 return static_cast<Linkage>(CachedLinkage); 957 } 958 bool hasLocalOrUnnamedType() const { 959 assert(isCacheValid() && "getting linkage from invalid cache"); 960 return CachedLocalOrUnnamed; 961 } 962 }; 963 enum { NumTypeBits = 17 }; 964 965protected: 966 // These classes allow subclasses to somewhat cleanly pack bitfields 967 // into Type. 968 969 class ArrayTypeBitfields { 970 friend class ArrayType; 971 972 unsigned : NumTypeBits; 973 974 /// IndexTypeQuals - CVR qualifiers from declarations like 975 /// 'int X[static restrict 4]'. For function parameters only. 976 unsigned IndexTypeQuals : 3; 977 978 /// SizeModifier - storage class qualifiers from declarations like 979 /// 'int X[static restrict 4]'. For function parameters only. 980 /// Actually an ArrayType::ArraySizeModifier. 981 unsigned SizeModifier : 3; 982 }; 983 984 class BuiltinTypeBitfields { 985 friend class BuiltinType; 986 987 unsigned : NumTypeBits; 988 989 /// The kind (BuiltinType::Kind) of builtin type this is. 990 unsigned Kind : 8; 991 }; 992 993 class FunctionTypeBitfields { 994 friend class FunctionType; 995 996 unsigned : NumTypeBits; 997 998 /// Extra information which affects how the function is called, like 999 /// regparm and the calling convention. 1000 unsigned ExtInfo : 8; 1001 1002 /// Whether the function is variadic. Only used by FunctionProtoType. 1003 unsigned Variadic : 1; 1004 1005 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1006 /// other bitfields. 1007 /// The qualifiers are part of FunctionProtoType because... 1008 /// 1009 /// C++ 8.3.5p4: The return type, the parameter type list and the 1010 /// cv-qualifier-seq, [...], are part of the function type. 1011 unsigned TypeQuals : 3; 1012 1013 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1014 /// 1015 /// This is a value of type \c RefQualifierKind. 1016 unsigned RefQualifier : 2; 1017 }; 1018 1019 class ObjCObjectTypeBitfields { 1020 friend class ObjCObjectType; 1021 1022 unsigned : NumTypeBits; 1023 1024 /// NumProtocols - The number of protocols stored directly on this 1025 /// object type. 1026 unsigned NumProtocols : 32 - NumTypeBits; 1027 }; 1028 1029 class ReferenceTypeBitfields { 1030 friend class ReferenceType; 1031 1032 unsigned : NumTypeBits; 1033 1034 /// True if the type was originally spelled with an lvalue sigil. 1035 /// This is never true of rvalue references but can also be false 1036 /// on lvalue references because of C++0x [dcl.typedef]p9, 1037 /// as follows: 1038 /// 1039 /// typedef int &ref; // lvalue, spelled lvalue 1040 /// typedef int &&rvref; // rvalue 1041 /// ref &a; // lvalue, inner ref, spelled lvalue 1042 /// ref &&a; // lvalue, inner ref 1043 /// rvref &a; // lvalue, inner ref, spelled lvalue 1044 /// rvref &&a; // rvalue, inner ref 1045 unsigned SpelledAsLValue : 1; 1046 1047 /// True if the inner type is a reference type. This only happens 1048 /// in non-canonical forms. 1049 unsigned InnerRef : 1; 1050 }; 1051 1052 class TypeWithKeywordBitfields { 1053 friend class TypeWithKeyword; 1054 1055 unsigned : NumTypeBits; 1056 1057 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1058 unsigned Keyword : 8; 1059 }; 1060 1061 class VectorTypeBitfields { 1062 friend class VectorType; 1063 1064 unsigned : NumTypeBits; 1065 1066 /// VecKind - The kind of vector, either a generic vector type or some 1067 /// target-specific vector type such as for AltiVec or Neon. 1068 unsigned VecKind : 3; 1069 1070 /// NumElements - The number of elements in the vector. 1071 unsigned NumElements : 29 - NumTypeBits; 1072 }; 1073 1074 class AttributedTypeBitfields { 1075 friend class AttributedType; 1076 1077 unsigned : NumTypeBits; 1078 1079 /// AttrKind - an AttributedType::Kind 1080 unsigned AttrKind : 32 - NumTypeBits; 1081 }; 1082 1083 union { 1084 TypeBitfields TypeBits; 1085 ArrayTypeBitfields ArrayTypeBits; 1086 AttributedTypeBitfields AttributedTypeBits; 1087 BuiltinTypeBitfields BuiltinTypeBits; 1088 FunctionTypeBitfields FunctionTypeBits; 1089 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1090 ReferenceTypeBitfields ReferenceTypeBits; 1091 TypeWithKeywordBitfields TypeWithKeywordBits; 1092 VectorTypeBitfields VectorTypeBits; 1093 }; 1094 1095private: 1096 /// \brief Set whether this type comes from an AST file. 1097 void setFromAST(bool V = true) const { 1098 TypeBits.FromAST = V; 1099 } 1100 1101 template <class T> friend class TypePropertyCache; 1102 1103protected: 1104 // silence VC++ warning C4355: 'this' : used in base member initializer list 1105 Type *this_() { return this; } 1106 Type(TypeClass tc, QualType canon, bool Dependent, bool VariablyModified, 1107 bool ContainsUnexpandedParameterPack) 1108 : ExtQualsTypeCommonBase(this, 1109 canon.isNull() ? QualType(this_(), 0) : canon) { 1110 TypeBits.TC = tc; 1111 TypeBits.Dependent = Dependent; 1112 TypeBits.VariablyModified = VariablyModified; 1113 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1114 TypeBits.CacheValidAndVisibility = 0; 1115 TypeBits.CachedLocalOrUnnamed = false; 1116 TypeBits.CachedLinkage = NoLinkage; 1117 TypeBits.FromAST = false; 1118 } 1119 friend class ASTContext; 1120 1121 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1122 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1123 void setContainsUnexpandedParameterPack(bool PP = true) { 1124 TypeBits.ContainsUnexpandedParameterPack = PP; 1125 } 1126 1127public: 1128 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1129 1130 /// \brief Whether this type comes from an AST file. 1131 bool isFromAST() const { return TypeBits.FromAST; } 1132 1133 /// \brief Whether this type is or contains an unexpanded parameter 1134 /// pack, used to support C++0x variadic templates. 1135 /// 1136 /// A type that contains a parameter pack shall be expanded by the 1137 /// ellipsis operator at some point. For example, the typedef in the 1138 /// following example contains an unexpanded parameter pack 'T': 1139 /// 1140 /// \code 1141 /// template<typename ...T> 1142 /// struct X { 1143 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1144 /// }; 1145 /// \endcode 1146 /// 1147 /// Note that this routine does not specify which 1148 bool containsUnexpandedParameterPack() const { 1149 return TypeBits.ContainsUnexpandedParameterPack; 1150 } 1151 1152 /// Determines if this type would be canonical if it had no further 1153 /// qualification. 1154 bool isCanonicalUnqualified() const { 1155 return CanonicalType == QualType(this, 0); 1156 } 1157 1158 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1159 /// object types, function types, and incomplete types. 1160 1161 /// isIncompleteType - Return true if this is an incomplete type. 1162 /// A type that can describe objects, but which lacks information needed to 1163 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1164 /// routine will need to determine if the size is actually required. 1165 bool isIncompleteType() const; 1166 1167 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1168 /// type, in other words, not a function type. 1169 bool isIncompleteOrObjectType() const { 1170 return !isFunctionType(); 1171 } 1172 1173 /// \brief Determine whether this type is an object type. 1174 bool isObjectType() const { 1175 // C++ [basic.types]p8: 1176 // An object type is a (possibly cv-qualified) type that is not a 1177 // function type, not a reference type, and not a void type. 1178 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1179 } 1180 1181 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1182 bool isPODType() const; 1183 1184 /// isLiteralType - Return true if this is a literal type 1185 /// (C++0x [basic.types]p10) 1186 bool isLiteralType() const; 1187 1188 /// isTrivialType - Return true if this is a trivial type 1189 /// (C++0x [basic.types]p9) 1190 bool isTrivialType() const; 1191 1192 /// isTriviallyCopyableType - Return true if this is a trivially copyable type 1193 /// (C++0x [basic.types]p9 1194 bool isTriviallyCopyableType() const; 1195 1196 /// \brief Test if this type is a standard-layout type. 1197 /// (C++0x [basic.type]p9) 1198 bool isStandardLayoutType() const; 1199 1200 /// isCXX11PODType() - Return true if this is a POD type according to the 1201 /// more relaxed rules of the C++11 standard, regardless of the current 1202 /// compilation's language. 1203 /// (C++0x [basic.types]p9) 1204 bool isCXX11PODType() const; 1205 1206 /// Helper methods to distinguish type categories. All type predicates 1207 /// operate on the canonical type, ignoring typedefs and qualifiers. 1208 1209 /// isBuiltinType - returns true if the type is a builtin type. 1210 bool isBuiltinType() const; 1211 1212 /// isSpecificBuiltinType - Test for a particular builtin type. 1213 bool isSpecificBuiltinType(unsigned K) const; 1214 1215 /// isPlaceholderType - Test for a type which does not represent an 1216 /// actual type-system type but is instead used as a placeholder for 1217 /// various convenient purposes within Clang. All such types are 1218 /// BuiltinTypes. 1219 bool isPlaceholderType() const; 1220 1221 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1222 bool isSpecificPlaceholderType(unsigned K) const; 1223 1224 /// isIntegerType() does *not* include complex integers (a GCC extension). 1225 /// isComplexIntegerType() can be used to test for complex integers. 1226 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1227 bool isEnumeralType() const; 1228 bool isBooleanType() const; 1229 bool isCharType() const; 1230 bool isWideCharType() const; 1231 bool isAnyCharacterType() const; 1232 bool isIntegralType(ASTContext &Ctx) const; 1233 1234 /// \brief Determine whether this type is an integral or enumeration type. 1235 bool isIntegralOrEnumerationType() const; 1236 /// \brief Determine whether this type is an integral or unscoped enumeration 1237 /// type. 1238 bool isIntegralOrUnscopedEnumerationType() const; 1239 1240 /// Floating point categories. 1241 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1242 /// isComplexType() does *not* include complex integers (a GCC extension). 1243 /// isComplexIntegerType() can be used to test for complex integers. 1244 bool isComplexType() const; // C99 6.2.5p11 (complex) 1245 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1246 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1247 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1248 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1249 bool isVoidType() const; // C99 6.2.5p19 1250 bool isDerivedType() const; // C99 6.2.5p20 1251 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1252 bool isAggregateType() const; 1253 bool isFundamentalType() const; 1254 bool isCompoundType() const; 1255 1256 // Type Predicates: Check to see if this type is structurally the specified 1257 // type, ignoring typedefs and qualifiers. 1258 bool isFunctionType() const; 1259 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1260 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1261 bool isPointerType() const; 1262 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1263 bool isBlockPointerType() const; 1264 bool isVoidPointerType() const; 1265 bool isReferenceType() const; 1266 bool isLValueReferenceType() const; 1267 bool isRValueReferenceType() const; 1268 bool isFunctionPointerType() const; 1269 bool isMemberPointerType() const; 1270 bool isMemberFunctionPointerType() const; 1271 bool isMemberDataPointerType() const; 1272 bool isArrayType() const; 1273 bool isConstantArrayType() const; 1274 bool isIncompleteArrayType() const; 1275 bool isVariableArrayType() const; 1276 bool isDependentSizedArrayType() const; 1277 bool isRecordType() const; 1278 bool isClassType() const; 1279 bool isStructureType() const; 1280 bool isStructureOrClassType() const; 1281 bool isUnionType() const; 1282 bool isComplexIntegerType() const; // GCC _Complex integer type. 1283 bool isVectorType() const; // GCC vector type. 1284 bool isExtVectorType() const; // Extended vector type. 1285 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1286 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1287 // for the common case. 1288 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1289 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1290 bool isObjCQualifiedIdType() const; // id<foo> 1291 bool isObjCQualifiedClassType() const; // Class<foo> 1292 bool isObjCObjectOrInterfaceType() const; 1293 bool isObjCIdType() const; // id 1294 bool isObjCClassType() const; // Class 1295 bool isObjCSelType() const; // Class 1296 bool isObjCBuiltinType() const; // 'id' or 'Class' 1297 bool isTemplateTypeParmType() const; // C++ template type parameter 1298 bool isNullPtrType() const; // C++0x nullptr_t 1299 1300 enum ScalarTypeKind { 1301 STK_Pointer, 1302 STK_MemberPointer, 1303 STK_Bool, 1304 STK_Integral, 1305 STK_Floating, 1306 STK_IntegralComplex, 1307 STK_FloatingComplex 1308 }; 1309 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1310 ScalarTypeKind getScalarTypeKind() const; 1311 1312 /// isDependentType - Whether this type is a dependent type, meaning 1313 /// that its definition somehow depends on a template parameter 1314 /// (C++ [temp.dep.type]). 1315 bool isDependentType() const { return TypeBits.Dependent; } 1316 1317 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1318 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1319 1320 /// \brief Whether this type involves a variable-length array type 1321 /// with a definite size. 1322 bool hasSizedVLAType() const; 1323 1324 /// \brief Whether this type is or contains a local or unnamed type. 1325 bool hasUnnamedOrLocalType() const; 1326 1327 bool isOverloadableType() const; 1328 1329 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1330 bool isElaboratedTypeSpecifier() const; 1331 1332 /// hasPointerRepresentation - Whether this type is represented 1333 /// natively as a pointer; this includes pointers, references, block 1334 /// pointers, and Objective-C interface, qualified id, and qualified 1335 /// interface types, as well as nullptr_t. 1336 bool hasPointerRepresentation() const; 1337 1338 /// hasObjCPointerRepresentation - Whether this type can represent 1339 /// an objective pointer type for the purpose of GC'ability 1340 bool hasObjCPointerRepresentation() const; 1341 1342 /// \brief Determine whether this type has an integer representation 1343 /// of some sort, e.g., it is an integer type or a vector. 1344 bool hasIntegerRepresentation() const; 1345 1346 /// \brief Determine whether this type has an signed integer representation 1347 /// of some sort, e.g., it is an signed integer type or a vector. 1348 bool hasSignedIntegerRepresentation() const; 1349 1350 /// \brief Determine whether this type has an unsigned integer representation 1351 /// of some sort, e.g., it is an unsigned integer type or a vector. 1352 bool hasUnsignedIntegerRepresentation() const; 1353 1354 /// \brief Determine whether this type has a floating-point representation 1355 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1356 bool hasFloatingRepresentation() const; 1357 1358 // Type Checking Functions: Check to see if this type is structurally the 1359 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1360 // the best type we can. 1361 const RecordType *getAsStructureType() const; 1362 /// NOTE: getAs*ArrayType are methods on ASTContext. 1363 const RecordType *getAsUnionType() const; 1364 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1365 // The following is a convenience method that returns an ObjCObjectPointerType 1366 // for object declared using an interface. 1367 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1368 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1369 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1370 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1371 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1372 1373 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1374 /// because the type is a RecordType or because it is the injected-class-name 1375 /// type of a class template or class template partial specialization. 1376 CXXRecordDecl *getAsCXXRecordDecl() const; 1377 1378 /// \brief Get the AutoType whose type will be deduced for a variable with 1379 /// an initializer of this type. This looks through declarators like pointer 1380 /// types, but not through decltype or typedefs. 1381 AutoType *getContainedAutoType() const; 1382 1383 /// Member-template getAs<specific type>'. Look through sugar for 1384 /// an instance of <specific type>. This scheme will eventually 1385 /// replace the specific getAsXXXX methods above. 1386 /// 1387 /// There are some specializations of this member template listed 1388 /// immediately following this class. 1389 template <typename T> const T *getAs() const; 1390 1391 /// A variant of getAs<> for array types which silently discards 1392 /// qualifiers from the outermost type. 1393 const ArrayType *getAsArrayTypeUnsafe() const; 1394 1395 /// Member-template castAs<specific type>. Look through sugar for 1396 /// the underlying instance of <specific type>. 1397 /// 1398 /// This method has the same relationship to getAs<T> as cast<T> has 1399 /// to dyn_cast<T>; which is to say, the underlying type *must* 1400 /// have the intended type, and this method will never return null. 1401 template <typename T> const T *castAs() const; 1402 1403 /// A variant of castAs<> for array type which silently discards 1404 /// qualifiers from the outermost type. 1405 const ArrayType *castAsArrayTypeUnsafe() const; 1406 1407 /// getBaseElementTypeUnsafe - Get the base element type of this 1408 /// type, potentially discarding type qualifiers. This method 1409 /// should never be used when type qualifiers are meaningful. 1410 const Type *getBaseElementTypeUnsafe() const; 1411 1412 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1413 /// element type of the array, potentially with type qualifiers missing. 1414 /// This method should never be used when type qualifiers are meaningful. 1415 const Type *getArrayElementTypeNoTypeQual() const; 1416 1417 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1418 /// pointer, this returns the respective pointee. 1419 QualType getPointeeType() const; 1420 1421 /// getUnqualifiedDesugaredType() - Return the specified type with 1422 /// any "sugar" removed from the type, removing any typedefs, 1423 /// typeofs, etc., as well as any qualifiers. 1424 const Type *getUnqualifiedDesugaredType() const; 1425 1426 /// More type predicates useful for type checking/promotion 1427 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1428 1429 /// isSignedIntegerType - Return true if this is an integer type that is 1430 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1431 /// or an enum decl which has a signed representation. 1432 bool isSignedIntegerType() const; 1433 1434 /// isUnsignedIntegerType - Return true if this is an integer type that is 1435 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1436 /// or an enum decl which has an unsigned representation. 1437 bool isUnsignedIntegerType() const; 1438 1439 /// Determines whether this is an integer type that is signed or an 1440 /// enumeration types whose underlying type is a signed integer type. 1441 bool isSignedIntegerOrEnumerationType() const; 1442 1443 /// Determines whether this is an integer type that is unsigned or an 1444 /// enumeration types whose underlying type is a unsigned integer type. 1445 bool isUnsignedIntegerOrEnumerationType() const; 1446 1447 /// isConstantSizeType - Return true if this is not a variable sized type, 1448 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1449 /// incomplete types. 1450 bool isConstantSizeType() const; 1451 1452 /// isSpecifierType - Returns true if this type can be represented by some 1453 /// set of type specifiers. 1454 bool isSpecifierType() const; 1455 1456 /// \brief Determine the linkage of this type. 1457 Linkage getLinkage() const; 1458 1459 /// \brief Determine the visibility of this type. 1460 Visibility getVisibility() const; 1461 1462 /// \brief Determine the linkage and visibility of this type. 1463 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1464 1465 /// \brief Note that the linkage is no longer known. 1466 void ClearLinkageCache(); 1467 1468 const char *getTypeClassName() const; 1469 1470 QualType getCanonicalTypeInternal() const { 1471 return CanonicalType; 1472 } 1473 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1474 void dump() const; 1475 static bool classof(const Type *) { return true; } 1476 1477 friend class ASTReader; 1478 friend class ASTWriter; 1479}; 1480 1481template <> inline const TypedefType *Type::getAs() const { 1482 return dyn_cast<TypedefType>(this); 1483} 1484 1485// We can do canonical leaf types faster, because we don't have to 1486// worry about preserving child type decoration. 1487#define TYPE(Class, Base) 1488#define LEAF_TYPE(Class) \ 1489template <> inline const Class##Type *Type::getAs() const { \ 1490 return dyn_cast<Class##Type>(CanonicalType); \ 1491} \ 1492template <> inline const Class##Type *Type::castAs() const { \ 1493 return cast<Class##Type>(CanonicalType); \ 1494} 1495#include "clang/AST/TypeNodes.def" 1496 1497 1498/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1499/// types are always canonical and have a literal name field. 1500class BuiltinType : public Type { 1501public: 1502 enum Kind { 1503 Void, 1504 1505 Bool, // This is bool and/or _Bool. 1506 Char_U, // This is 'char' for targets where char is unsigned. 1507 UChar, // This is explicitly qualified unsigned char. 1508 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1509 Char16, // This is 'char16_t' for C++. 1510 Char32, // This is 'char32_t' for C++. 1511 UShort, 1512 UInt, 1513 ULong, 1514 ULongLong, 1515 UInt128, // __uint128_t 1516 1517 Char_S, // This is 'char' for targets where char is signed. 1518 SChar, // This is explicitly qualified signed char. 1519 WChar_S, // This is 'wchar_t' for C++, when signed. 1520 Short, 1521 Int, 1522 Long, 1523 LongLong, 1524 Int128, // __int128_t 1525 1526 Float, Double, LongDouble, 1527 1528 NullPtr, // This is the type of C++0x 'nullptr'. 1529 1530 /// The primitive Objective C 'id' type. The user-visible 'id' 1531 /// type is a typedef of an ObjCObjectPointerType to an 1532 /// ObjCObjectType with this as its base. In fact, this only ever 1533 /// shows up in an AST as the base type of an ObjCObjectType. 1534 ObjCId, 1535 1536 /// The primitive Objective C 'Class' type. The user-visible 1537 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1538 /// ObjCObjectType with this as its base. In fact, this only ever 1539 /// shows up in an AST as the base type of an ObjCObjectType. 1540 ObjCClass, 1541 1542 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1543 /// type is a typedef of a PointerType to this. 1544 ObjCSel, 1545 1546 /// This represents the type of an expression whose type is 1547 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1548 /// appear in situations where the structure of the type is 1549 /// theoretically deducible. 1550 Dependent, 1551 1552 /// The type of an unresolved overload set. A placeholder type. 1553 /// Expressions with this type have one of the following basic 1554 /// forms, with parentheses generally permitted: 1555 /// foo # possibly qualified, not if an implicit access 1556 /// foo # possibly qualified, not if an implicit access 1557 /// &foo # possibly qualified, not if an implicit access 1558 /// x->foo # only if might be a static member function 1559 /// &x->foo # only if might be a static member function 1560 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1561 /// OverloadExpr::find can be used to analyze the expression. 1562 Overload, 1563 1564 /// The type of a bound C++ non-static member function. 1565 /// A placeholder type. Expressions with this type have one of the 1566 /// following basic forms: 1567 /// foo # if an implicit access 1568 /// x->foo # if only contains non-static members 1569 BoundMember, 1570 1571 /// __builtin_any_type. A placeholder type. Useful for clients 1572 /// like debuggers that don't know what type to give something. 1573 /// Only a small number of operations are valid on expressions of 1574 /// unknown type, most notably explicit casts. 1575 UnknownAny 1576 }; 1577 1578public: 1579 BuiltinType(Kind K) 1580 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1581 /*VariablyModified=*/false, 1582 /*Unexpanded paramter pack=*/false) { 1583 BuiltinTypeBits.Kind = K; 1584 } 1585 1586 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1587 const char *getName(const LangOptions &LO) const; 1588 1589 bool isSugared() const { return false; } 1590 QualType desugar() const { return QualType(this, 0); } 1591 1592 bool isInteger() const { 1593 return getKind() >= Bool && getKind() <= Int128; 1594 } 1595 1596 bool isSignedInteger() const { 1597 return getKind() >= Char_S && getKind() <= Int128; 1598 } 1599 1600 bool isUnsignedInteger() const { 1601 return getKind() >= Bool && getKind() <= UInt128; 1602 } 1603 1604 bool isFloatingPoint() const { 1605 return getKind() >= Float && getKind() <= LongDouble; 1606 } 1607 1608 /// Determines whether this type is a placeholder type, i.e. a type 1609 /// which cannot appear in arbitrary positions in a fully-formed 1610 /// expression. 1611 bool isPlaceholderType() const { 1612 return getKind() >= Overload; 1613 } 1614 1615 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1616 static bool classof(const BuiltinType *) { return true; } 1617}; 1618 1619/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1620/// types (_Complex float etc) as well as the GCC integer complex extensions. 1621/// 1622class ComplexType : public Type, public llvm::FoldingSetNode { 1623 QualType ElementType; 1624 ComplexType(QualType Element, QualType CanonicalPtr) : 1625 Type(Complex, CanonicalPtr, Element->isDependentType(), 1626 Element->isVariablyModifiedType(), 1627 Element->containsUnexpandedParameterPack()), 1628 ElementType(Element) { 1629 } 1630 friend class ASTContext; // ASTContext creates these. 1631 1632public: 1633 QualType getElementType() const { return ElementType; } 1634 1635 bool isSugared() const { return false; } 1636 QualType desugar() const { return QualType(this, 0); } 1637 1638 void Profile(llvm::FoldingSetNodeID &ID) { 1639 Profile(ID, getElementType()); 1640 } 1641 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1642 ID.AddPointer(Element.getAsOpaquePtr()); 1643 } 1644 1645 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1646 static bool classof(const ComplexType *) { return true; } 1647}; 1648 1649/// ParenType - Sugar for parentheses used when specifying types. 1650/// 1651class ParenType : public Type, public llvm::FoldingSetNode { 1652 QualType Inner; 1653 1654 ParenType(QualType InnerType, QualType CanonType) : 1655 Type(Paren, CanonType, InnerType->isDependentType(), 1656 InnerType->isVariablyModifiedType(), 1657 InnerType->containsUnexpandedParameterPack()), 1658 Inner(InnerType) { 1659 } 1660 friend class ASTContext; // ASTContext creates these. 1661 1662public: 1663 1664 QualType getInnerType() const { return Inner; } 1665 1666 bool isSugared() const { return true; } 1667 QualType desugar() const { return getInnerType(); } 1668 1669 void Profile(llvm::FoldingSetNodeID &ID) { 1670 Profile(ID, getInnerType()); 1671 } 1672 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1673 Inner.Profile(ID); 1674 } 1675 1676 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1677 static bool classof(const ParenType *) { return true; } 1678}; 1679 1680/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1681/// 1682class PointerType : public Type, public llvm::FoldingSetNode { 1683 QualType PointeeType; 1684 1685 PointerType(QualType Pointee, QualType CanonicalPtr) : 1686 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1687 Pointee->isVariablyModifiedType(), 1688 Pointee->containsUnexpandedParameterPack()), 1689 PointeeType(Pointee) { 1690 } 1691 friend class ASTContext; // ASTContext creates these. 1692 1693public: 1694 1695 QualType getPointeeType() const { return PointeeType; } 1696 1697 bool isSugared() const { return false; } 1698 QualType desugar() const { return QualType(this, 0); } 1699 1700 void Profile(llvm::FoldingSetNodeID &ID) { 1701 Profile(ID, getPointeeType()); 1702 } 1703 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1704 ID.AddPointer(Pointee.getAsOpaquePtr()); 1705 } 1706 1707 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1708 static bool classof(const PointerType *) { return true; } 1709}; 1710 1711/// BlockPointerType - pointer to a block type. 1712/// This type is to represent types syntactically represented as 1713/// "void (^)(int)", etc. Pointee is required to always be a function type. 1714/// 1715class BlockPointerType : public Type, public llvm::FoldingSetNode { 1716 QualType PointeeType; // Block is some kind of pointer type 1717 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1718 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1719 Pointee->isVariablyModifiedType(), 1720 Pointee->containsUnexpandedParameterPack()), 1721 PointeeType(Pointee) { 1722 } 1723 friend class ASTContext; // ASTContext creates these. 1724 1725public: 1726 1727 // Get the pointee type. Pointee is required to always be a function type. 1728 QualType getPointeeType() const { return PointeeType; } 1729 1730 bool isSugared() const { return false; } 1731 QualType desugar() const { return QualType(this, 0); } 1732 1733 void Profile(llvm::FoldingSetNodeID &ID) { 1734 Profile(ID, getPointeeType()); 1735 } 1736 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1737 ID.AddPointer(Pointee.getAsOpaquePtr()); 1738 } 1739 1740 static bool classof(const Type *T) { 1741 return T->getTypeClass() == BlockPointer; 1742 } 1743 static bool classof(const BlockPointerType *) { return true; } 1744}; 1745 1746/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1747/// 1748class ReferenceType : public Type, public llvm::FoldingSetNode { 1749 QualType PointeeType; 1750 1751protected: 1752 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1753 bool SpelledAsLValue) : 1754 Type(tc, CanonicalRef, Referencee->isDependentType(), 1755 Referencee->isVariablyModifiedType(), 1756 Referencee->containsUnexpandedParameterPack()), 1757 PointeeType(Referencee) 1758 { 1759 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1760 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1761 } 1762 1763public: 1764 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1765 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1766 1767 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1768 QualType getPointeeType() const { 1769 // FIXME: this might strip inner qualifiers; okay? 1770 const ReferenceType *T = this; 1771 while (T->isInnerRef()) 1772 T = T->PointeeType->castAs<ReferenceType>(); 1773 return T->PointeeType; 1774 } 1775 1776 void Profile(llvm::FoldingSetNodeID &ID) { 1777 Profile(ID, PointeeType, isSpelledAsLValue()); 1778 } 1779 static void Profile(llvm::FoldingSetNodeID &ID, 1780 QualType Referencee, 1781 bool SpelledAsLValue) { 1782 ID.AddPointer(Referencee.getAsOpaquePtr()); 1783 ID.AddBoolean(SpelledAsLValue); 1784 } 1785 1786 static bool classof(const Type *T) { 1787 return T->getTypeClass() == LValueReference || 1788 T->getTypeClass() == RValueReference; 1789 } 1790 static bool classof(const ReferenceType *) { return true; } 1791}; 1792 1793/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1794/// 1795class LValueReferenceType : public ReferenceType { 1796 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1797 bool SpelledAsLValue) : 1798 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1799 {} 1800 friend class ASTContext; // ASTContext creates these 1801public: 1802 bool isSugared() const { return false; } 1803 QualType desugar() const { return QualType(this, 0); } 1804 1805 static bool classof(const Type *T) { 1806 return T->getTypeClass() == LValueReference; 1807 } 1808 static bool classof(const LValueReferenceType *) { return true; } 1809}; 1810 1811/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1812/// 1813class RValueReferenceType : public ReferenceType { 1814 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1815 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1816 } 1817 friend class ASTContext; // ASTContext creates these 1818public: 1819 bool isSugared() const { return false; } 1820 QualType desugar() const { return QualType(this, 0); } 1821 1822 static bool classof(const Type *T) { 1823 return T->getTypeClass() == RValueReference; 1824 } 1825 static bool classof(const RValueReferenceType *) { return true; } 1826}; 1827 1828/// MemberPointerType - C++ 8.3.3 - Pointers to members 1829/// 1830class MemberPointerType : public Type, public llvm::FoldingSetNode { 1831 QualType PointeeType; 1832 /// The class of which the pointee is a member. Must ultimately be a 1833 /// RecordType, but could be a typedef or a template parameter too. 1834 const Type *Class; 1835 1836 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1837 Type(MemberPointer, CanonicalPtr, 1838 Cls->isDependentType() || Pointee->isDependentType(), 1839 Pointee->isVariablyModifiedType(), 1840 (Cls->containsUnexpandedParameterPack() || 1841 Pointee->containsUnexpandedParameterPack())), 1842 PointeeType(Pointee), Class(Cls) { 1843 } 1844 friend class ASTContext; // ASTContext creates these. 1845 1846public: 1847 QualType getPointeeType() const { return PointeeType; } 1848 1849 /// Returns true if the member type (i.e. the pointee type) is a 1850 /// function type rather than a data-member type. 1851 bool isMemberFunctionPointer() const { 1852 return PointeeType->isFunctionProtoType(); 1853 } 1854 1855 /// Returns true if the member type (i.e. the pointee type) is a 1856 /// data type rather than a function type. 1857 bool isMemberDataPointer() const { 1858 return !PointeeType->isFunctionProtoType(); 1859 } 1860 1861 const Type *getClass() const { return Class; } 1862 1863 bool isSugared() const { return false; } 1864 QualType desugar() const { return QualType(this, 0); } 1865 1866 void Profile(llvm::FoldingSetNodeID &ID) { 1867 Profile(ID, getPointeeType(), getClass()); 1868 } 1869 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1870 const Type *Class) { 1871 ID.AddPointer(Pointee.getAsOpaquePtr()); 1872 ID.AddPointer(Class); 1873 } 1874 1875 static bool classof(const Type *T) { 1876 return T->getTypeClass() == MemberPointer; 1877 } 1878 static bool classof(const MemberPointerType *) { return true; } 1879}; 1880 1881/// ArrayType - C99 6.7.5.2 - Array Declarators. 1882/// 1883class ArrayType : public Type, public llvm::FoldingSetNode { 1884public: 1885 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1886 /// an array with a static size (e.g. int X[static 4]), or an array 1887 /// with a star size (e.g. int X[*]). 1888 /// 'static' is only allowed on function parameters. 1889 enum ArraySizeModifier { 1890 Normal, Static, Star 1891 }; 1892private: 1893 /// ElementType - The element type of the array. 1894 QualType ElementType; 1895 1896protected: 1897 // C++ [temp.dep.type]p1: 1898 // A type is dependent if it is... 1899 // - an array type constructed from any dependent type or whose 1900 // size is specified by a constant expression that is 1901 // value-dependent, 1902 ArrayType(TypeClass tc, QualType et, QualType can, 1903 ArraySizeModifier sm, unsigned tq, 1904 bool ContainsUnexpandedParameterPack) 1905 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1906 (tc == VariableArray || et->isVariablyModifiedType()), 1907 ContainsUnexpandedParameterPack), 1908 ElementType(et) { 1909 ArrayTypeBits.IndexTypeQuals = tq; 1910 ArrayTypeBits.SizeModifier = sm; 1911 } 1912 1913 friend class ASTContext; // ASTContext creates these. 1914 1915public: 1916 QualType getElementType() const { return ElementType; } 1917 ArraySizeModifier getSizeModifier() const { 1918 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1919 } 1920 Qualifiers getIndexTypeQualifiers() const { 1921 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1922 } 1923 unsigned getIndexTypeCVRQualifiers() const { 1924 return ArrayTypeBits.IndexTypeQuals; 1925 } 1926 1927 static bool classof(const Type *T) { 1928 return T->getTypeClass() == ConstantArray || 1929 T->getTypeClass() == VariableArray || 1930 T->getTypeClass() == IncompleteArray || 1931 T->getTypeClass() == DependentSizedArray; 1932 } 1933 static bool classof(const ArrayType *) { return true; } 1934}; 1935 1936/// ConstantArrayType - This class represents the canonical version of 1937/// C arrays with a specified constant size. For example, the canonical 1938/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1939/// type is 'int' and the size is 404. 1940class ConstantArrayType : public ArrayType { 1941 llvm::APInt Size; // Allows us to unique the type. 1942 1943 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1944 ArraySizeModifier sm, unsigned tq) 1945 : ArrayType(ConstantArray, et, can, sm, tq, 1946 et->containsUnexpandedParameterPack()), 1947 Size(size) {} 1948protected: 1949 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1950 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1951 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1952 Size(size) {} 1953 friend class ASTContext; // ASTContext creates these. 1954public: 1955 const llvm::APInt &getSize() const { return Size; } 1956 bool isSugared() const { return false; } 1957 QualType desugar() const { return QualType(this, 0); } 1958 1959 1960 /// \brief Determine the number of bits required to address a member of 1961 // an array with the given element type and number of elements. 1962 static unsigned getNumAddressingBits(ASTContext &Context, 1963 QualType ElementType, 1964 const llvm::APInt &NumElements); 1965 1966 /// \brief Determine the maximum number of active bits that an array's size 1967 /// can require, which limits the maximum size of the array. 1968 static unsigned getMaxSizeBits(ASTContext &Context); 1969 1970 void Profile(llvm::FoldingSetNodeID &ID) { 1971 Profile(ID, getElementType(), getSize(), 1972 getSizeModifier(), getIndexTypeCVRQualifiers()); 1973 } 1974 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1975 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1976 unsigned TypeQuals) { 1977 ID.AddPointer(ET.getAsOpaquePtr()); 1978 ID.AddInteger(ArraySize.getZExtValue()); 1979 ID.AddInteger(SizeMod); 1980 ID.AddInteger(TypeQuals); 1981 } 1982 static bool classof(const Type *T) { 1983 return T->getTypeClass() == ConstantArray; 1984 } 1985 static bool classof(const ConstantArrayType *) { return true; } 1986}; 1987 1988/// IncompleteArrayType - This class represents C arrays with an unspecified 1989/// size. For example 'int A[]' has an IncompleteArrayType where the element 1990/// type is 'int' and the size is unspecified. 1991class IncompleteArrayType : public ArrayType { 1992 1993 IncompleteArrayType(QualType et, QualType can, 1994 ArraySizeModifier sm, unsigned tq) 1995 : ArrayType(IncompleteArray, et, can, sm, tq, 1996 et->containsUnexpandedParameterPack()) {} 1997 friend class ASTContext; // ASTContext creates these. 1998public: 1999 bool isSugared() const { return false; } 2000 QualType desugar() const { return QualType(this, 0); } 2001 2002 static bool classof(const Type *T) { 2003 return T->getTypeClass() == IncompleteArray; 2004 } 2005 static bool classof(const IncompleteArrayType *) { return true; } 2006 2007 friend class StmtIteratorBase; 2008 2009 void Profile(llvm::FoldingSetNodeID &ID) { 2010 Profile(ID, getElementType(), getSizeModifier(), 2011 getIndexTypeCVRQualifiers()); 2012 } 2013 2014 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2015 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2016 ID.AddPointer(ET.getAsOpaquePtr()); 2017 ID.AddInteger(SizeMod); 2018 ID.AddInteger(TypeQuals); 2019 } 2020}; 2021 2022/// VariableArrayType - This class represents C arrays with a specified size 2023/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2024/// Since the size expression is an arbitrary expression, we store it as such. 2025/// 2026/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2027/// should not be: two lexically equivalent variable array types could mean 2028/// different things, for example, these variables do not have the same type 2029/// dynamically: 2030/// 2031/// void foo(int x) { 2032/// int Y[x]; 2033/// ++x; 2034/// int Z[x]; 2035/// } 2036/// 2037class VariableArrayType : public ArrayType { 2038 /// SizeExpr - An assignment expression. VLA's are only permitted within 2039 /// a function block. 2040 Stmt *SizeExpr; 2041 /// Brackets - The left and right array brackets. 2042 SourceRange Brackets; 2043 2044 VariableArrayType(QualType et, QualType can, Expr *e, 2045 ArraySizeModifier sm, unsigned tq, 2046 SourceRange brackets) 2047 : ArrayType(VariableArray, et, can, sm, tq, 2048 et->containsUnexpandedParameterPack()), 2049 SizeExpr((Stmt*) e), Brackets(brackets) {} 2050 friend class ASTContext; // ASTContext creates these. 2051 2052public: 2053 Expr *getSizeExpr() const { 2054 // We use C-style casts instead of cast<> here because we do not wish 2055 // to have a dependency of Type.h on Stmt.h/Expr.h. 2056 return (Expr*) SizeExpr; 2057 } 2058 SourceRange getBracketsRange() const { return Brackets; } 2059 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2060 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2061 2062 bool isSugared() const { return false; } 2063 QualType desugar() const { return QualType(this, 0); } 2064 2065 static bool classof(const Type *T) { 2066 return T->getTypeClass() == VariableArray; 2067 } 2068 static bool classof(const VariableArrayType *) { return true; } 2069 2070 friend class StmtIteratorBase; 2071 2072 void Profile(llvm::FoldingSetNodeID &ID) { 2073 assert(0 && "Cannot unique VariableArrayTypes."); 2074 } 2075}; 2076 2077/// DependentSizedArrayType - This type represents an array type in 2078/// C++ whose size is a value-dependent expression. For example: 2079/// 2080/// \code 2081/// template<typename T, int Size> 2082/// class array { 2083/// T data[Size]; 2084/// }; 2085/// \endcode 2086/// 2087/// For these types, we won't actually know what the array bound is 2088/// until template instantiation occurs, at which point this will 2089/// become either a ConstantArrayType or a VariableArrayType. 2090class DependentSizedArrayType : public ArrayType { 2091 const ASTContext &Context; 2092 2093 /// \brief An assignment expression that will instantiate to the 2094 /// size of the array. 2095 /// 2096 /// The expression itself might be NULL, in which case the array 2097 /// type will have its size deduced from an initializer. 2098 Stmt *SizeExpr; 2099 2100 /// Brackets - The left and right array brackets. 2101 SourceRange Brackets; 2102 2103 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2104 Expr *e, ArraySizeModifier sm, unsigned tq, 2105 SourceRange brackets); 2106 2107 friend class ASTContext; // ASTContext creates these. 2108 2109public: 2110 Expr *getSizeExpr() const { 2111 // We use C-style casts instead of cast<> here because we do not wish 2112 // to have a dependency of Type.h on Stmt.h/Expr.h. 2113 return (Expr*) SizeExpr; 2114 } 2115 SourceRange getBracketsRange() const { return Brackets; } 2116 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2117 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2118 2119 bool isSugared() const { return false; } 2120 QualType desugar() const { return QualType(this, 0); } 2121 2122 static bool classof(const Type *T) { 2123 return T->getTypeClass() == DependentSizedArray; 2124 } 2125 static bool classof(const DependentSizedArrayType *) { return true; } 2126 2127 friend class StmtIteratorBase; 2128 2129 2130 void Profile(llvm::FoldingSetNodeID &ID) { 2131 Profile(ID, Context, getElementType(), 2132 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2133 } 2134 2135 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2136 QualType ET, ArraySizeModifier SizeMod, 2137 unsigned TypeQuals, Expr *E); 2138}; 2139 2140/// DependentSizedExtVectorType - This type represent an extended vector type 2141/// where either the type or size is dependent. For example: 2142/// @code 2143/// template<typename T, int Size> 2144/// class vector { 2145/// typedef T __attribute__((ext_vector_type(Size))) type; 2146/// } 2147/// @endcode 2148class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2149 const ASTContext &Context; 2150 Expr *SizeExpr; 2151 /// ElementType - The element type of the array. 2152 QualType ElementType; 2153 SourceLocation loc; 2154 2155 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2156 QualType can, Expr *SizeExpr, SourceLocation loc); 2157 2158 friend class ASTContext; 2159 2160public: 2161 Expr *getSizeExpr() const { return SizeExpr; } 2162 QualType getElementType() const { return ElementType; } 2163 SourceLocation getAttributeLoc() const { return loc; } 2164 2165 bool isSugared() const { return false; } 2166 QualType desugar() const { return QualType(this, 0); } 2167 2168 static bool classof(const Type *T) { 2169 return T->getTypeClass() == DependentSizedExtVector; 2170 } 2171 static bool classof(const DependentSizedExtVectorType *) { return true; } 2172 2173 void Profile(llvm::FoldingSetNodeID &ID) { 2174 Profile(ID, Context, getElementType(), getSizeExpr()); 2175 } 2176 2177 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2178 QualType ElementType, Expr *SizeExpr); 2179}; 2180 2181 2182/// VectorType - GCC generic vector type. This type is created using 2183/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2184/// bytes; or from an Altivec __vector or vector declaration. 2185/// Since the constructor takes the number of vector elements, the 2186/// client is responsible for converting the size into the number of elements. 2187class VectorType : public Type, public llvm::FoldingSetNode { 2188public: 2189 enum VectorKind { 2190 GenericVector, // not a target-specific vector type 2191 AltiVecVector, // is AltiVec vector 2192 AltiVecPixel, // is AltiVec 'vector Pixel' 2193 AltiVecBool, // is AltiVec 'vector bool ...' 2194 NeonVector, // is ARM Neon vector 2195 NeonPolyVector // is ARM Neon polynomial vector 2196 }; 2197protected: 2198 /// ElementType - The element type of the vector. 2199 QualType ElementType; 2200 2201 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2202 VectorKind vecKind); 2203 2204 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2205 QualType canonType, VectorKind vecKind); 2206 2207 friend class ASTContext; // ASTContext creates these. 2208 2209public: 2210 2211 QualType getElementType() const { return ElementType; } 2212 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2213 2214 bool isSugared() const { return false; } 2215 QualType desugar() const { return QualType(this, 0); } 2216 2217 VectorKind getVectorKind() const { 2218 return VectorKind(VectorTypeBits.VecKind); 2219 } 2220 2221 void Profile(llvm::FoldingSetNodeID &ID) { 2222 Profile(ID, getElementType(), getNumElements(), 2223 getTypeClass(), getVectorKind()); 2224 } 2225 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2226 unsigned NumElements, TypeClass TypeClass, 2227 VectorKind VecKind) { 2228 ID.AddPointer(ElementType.getAsOpaquePtr()); 2229 ID.AddInteger(NumElements); 2230 ID.AddInteger(TypeClass); 2231 ID.AddInteger(VecKind); 2232 } 2233 2234 static bool classof(const Type *T) { 2235 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2236 } 2237 static bool classof(const VectorType *) { return true; } 2238}; 2239 2240/// ExtVectorType - Extended vector type. This type is created using 2241/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2242/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2243/// class enables syntactic extensions, like Vector Components for accessing 2244/// points, colors, and textures (modeled after OpenGL Shading Language). 2245class ExtVectorType : public VectorType { 2246 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2247 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2248 friend class ASTContext; // ASTContext creates these. 2249public: 2250 static int getPointAccessorIdx(char c) { 2251 switch (c) { 2252 default: return -1; 2253 case 'x': case 'r': return 0; 2254 case 'y': case 'g': return 1; 2255 case 'z': case 'b': return 2; 2256 case 'w': case 'a': return 3; 2257 } 2258 } 2259 static int getNumericAccessorIdx(char c) { 2260 switch (c) { 2261 default: return -1; 2262 case '0': return 0; 2263 case '1': return 1; 2264 case '2': return 2; 2265 case '3': return 3; 2266 case '4': return 4; 2267 case '5': return 5; 2268 case '6': return 6; 2269 case '7': return 7; 2270 case '8': return 8; 2271 case '9': return 9; 2272 case 'A': 2273 case 'a': return 10; 2274 case 'B': 2275 case 'b': return 11; 2276 case 'C': 2277 case 'c': return 12; 2278 case 'D': 2279 case 'd': return 13; 2280 case 'E': 2281 case 'e': return 14; 2282 case 'F': 2283 case 'f': return 15; 2284 } 2285 } 2286 2287 static int getAccessorIdx(char c) { 2288 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2289 return getNumericAccessorIdx(c); 2290 } 2291 2292 bool isAccessorWithinNumElements(char c) const { 2293 if (int idx = getAccessorIdx(c)+1) 2294 return unsigned(idx-1) < getNumElements(); 2295 return false; 2296 } 2297 bool isSugared() const { return false; } 2298 QualType desugar() const { return QualType(this, 0); } 2299 2300 static bool classof(const Type *T) { 2301 return T->getTypeClass() == ExtVector; 2302 } 2303 static bool classof(const ExtVectorType *) { return true; } 2304}; 2305 2306/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2307/// class of FunctionNoProtoType and FunctionProtoType. 2308/// 2309class FunctionType : public Type { 2310 // The type returned by the function. 2311 QualType ResultType; 2312 2313 public: 2314 /// ExtInfo - A class which abstracts out some details necessary for 2315 /// making a call. 2316 /// 2317 /// It is not actually used directly for storing this information in 2318 /// a FunctionType, although FunctionType does currently use the 2319 /// same bit-pattern. 2320 /// 2321 // If you add a field (say Foo), other than the obvious places (both, 2322 // constructors, compile failures), what you need to update is 2323 // * Operator== 2324 // * getFoo 2325 // * withFoo 2326 // * functionType. Add Foo, getFoo. 2327 // * ASTContext::getFooType 2328 // * ASTContext::mergeFunctionTypes 2329 // * FunctionNoProtoType::Profile 2330 // * FunctionProtoType::Profile 2331 // * TypePrinter::PrintFunctionProto 2332 // * AST read and write 2333 // * Codegen 2334 class ExtInfo { 2335 // Feel free to rearrange or add bits, but if you go over 8, 2336 // you'll need to adjust both the Bits field below and 2337 // Type::FunctionTypeBitfields. 2338 2339 // | CC |noreturn|hasregparm|regparm 2340 // |0 .. 2| 3 | 4 |5 .. 7 2341 enum { CallConvMask = 0x7 }; 2342 enum { NoReturnMask = 0x8 }; 2343 enum { HasRegParmMask = 0x10 }; 2344 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2345 RegParmOffset = 5 }; 2346 2347 unsigned char Bits; 2348 2349 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2350 2351 friend class FunctionType; 2352 2353 public: 2354 // Constructor with no defaults. Use this when you know that you 2355 // have all the elements (when reading an AST file for example). 2356 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc) { 2357 Bits = ((unsigned) cc) | 2358 (noReturn ? NoReturnMask : 0) | 2359 (hasRegParm ? HasRegParmMask : 0) | 2360 (regParm << RegParmOffset); 2361 } 2362 2363 // Constructor with all defaults. Use when for example creating a 2364 // function know to use defaults. 2365 ExtInfo() : Bits(0) {} 2366 2367 bool getNoReturn() const { return Bits & NoReturnMask; } 2368 bool getHasRegParm() const { return Bits & HasRegParmMask; } 2369 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2370 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2371 2372 bool operator==(ExtInfo Other) const { 2373 return Bits == Other.Bits; 2374 } 2375 bool operator!=(ExtInfo Other) const { 2376 return Bits != Other.Bits; 2377 } 2378 2379 // Note that we don't have setters. That is by design, use 2380 // the following with methods instead of mutating these objects. 2381 2382 ExtInfo withNoReturn(bool noReturn) const { 2383 if (noReturn) 2384 return ExtInfo(Bits | NoReturnMask); 2385 else 2386 return ExtInfo(Bits & ~NoReturnMask); 2387 } 2388 2389 ExtInfo withRegParm(unsigned RegParm) const { 2390 return ExtInfo(HasRegParmMask | (Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2391 } 2392 2393 ExtInfo withCallingConv(CallingConv cc) const { 2394 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2395 } 2396 2397 void Profile(llvm::FoldingSetNodeID &ID) const { 2398 ID.AddInteger(Bits); 2399 } 2400 }; 2401 2402protected: 2403 FunctionType(TypeClass tc, QualType res, bool variadic, 2404 unsigned typeQuals, RefQualifierKind RefQualifier, 2405 QualType Canonical, bool Dependent, 2406 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2407 ExtInfo Info) 2408 : Type(tc, Canonical, Dependent, VariablyModified, 2409 ContainsUnexpandedParameterPack), 2410 ResultType(res) { 2411 FunctionTypeBits.ExtInfo = Info.Bits; 2412 FunctionTypeBits.Variadic = variadic; 2413 FunctionTypeBits.TypeQuals = typeQuals; 2414 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2415 } 2416 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2417 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2418 2419 RefQualifierKind getRefQualifier() const { 2420 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2421 } 2422 2423public: 2424 2425 QualType getResultType() const { return ResultType; } 2426 2427 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2428 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2429 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2430 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2431 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2432 2433 /// \brief Determine the type of an expression that calls a function of 2434 /// this type. 2435 QualType getCallResultType(ASTContext &Context) const { 2436 return getResultType().getNonLValueExprType(Context); 2437 } 2438 2439 static llvm::StringRef getNameForCallConv(CallingConv CC); 2440 2441 static bool classof(const Type *T) { 2442 return T->getTypeClass() == FunctionNoProto || 2443 T->getTypeClass() == FunctionProto; 2444 } 2445 static bool classof(const FunctionType *) { return true; } 2446}; 2447 2448/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2449/// no information available about its arguments. 2450class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2451 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2452 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2453 /*Dependent=*/false, Result->isVariablyModifiedType(), 2454 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2455 2456 friend class ASTContext; // ASTContext creates these. 2457 2458public: 2459 // No additional state past what FunctionType provides. 2460 2461 bool isSugared() const { return false; } 2462 QualType desugar() const { return QualType(this, 0); } 2463 2464 void Profile(llvm::FoldingSetNodeID &ID) { 2465 Profile(ID, getResultType(), getExtInfo()); 2466 } 2467 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2468 ExtInfo Info) { 2469 Info.Profile(ID); 2470 ID.AddPointer(ResultType.getAsOpaquePtr()); 2471 } 2472 2473 static bool classof(const Type *T) { 2474 return T->getTypeClass() == FunctionNoProto; 2475 } 2476 static bool classof(const FunctionNoProtoType *) { return true; } 2477}; 2478 2479/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2480/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2481/// arguments, not as having a single void argument. Such a type can have an 2482/// exception specification, but this specification is not part of the canonical 2483/// type. 2484class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2485public: 2486 /// ExtProtoInfo - Extra information about a function prototype. 2487 struct ExtProtoInfo { 2488 ExtProtoInfo() : 2489 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2490 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0) {} 2491 2492 FunctionType::ExtInfo ExtInfo; 2493 bool Variadic; 2494 ExceptionSpecificationType ExceptionSpecType; 2495 unsigned char TypeQuals; 2496 RefQualifierKind RefQualifier; 2497 unsigned NumExceptions; 2498 const QualType *Exceptions; 2499 Expr *NoexceptExpr; 2500 }; 2501 2502private: 2503 /// \brief Determine whether there are any argument types that 2504 /// contain an unexpanded parameter pack. 2505 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2506 unsigned numArgs) { 2507 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2508 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2509 return true; 2510 2511 return false; 2512 } 2513 2514 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2515 QualType canonical, const ExtProtoInfo &epi); 2516 2517 /// NumArgs - The number of arguments this function has, not counting '...'. 2518 unsigned NumArgs : 20; 2519 2520 /// NumExceptions - The number of types in the exception spec, if any. 2521 unsigned NumExceptions : 9; 2522 2523 /// ExceptionSpecType - The type of exception specification this function has. 2524 unsigned ExceptionSpecType : 3; 2525 2526 /// ArgInfo - There is an variable size array after the class in memory that 2527 /// holds the argument types. 2528 2529 /// Exceptions - There is another variable size array after ArgInfo that 2530 /// holds the exception types. 2531 2532 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2533 /// to the expression in the noexcept() specifier. 2534 2535 friend class ASTContext; // ASTContext creates these. 2536 2537public: 2538 unsigned getNumArgs() const { return NumArgs; } 2539 QualType getArgType(unsigned i) const { 2540 assert(i < NumArgs && "Invalid argument number!"); 2541 return arg_type_begin()[i]; 2542 } 2543 2544 ExtProtoInfo getExtProtoInfo() const { 2545 ExtProtoInfo EPI; 2546 EPI.ExtInfo = getExtInfo(); 2547 EPI.Variadic = isVariadic(); 2548 EPI.ExceptionSpecType = getExceptionSpecType(); 2549 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2550 EPI.RefQualifier = getRefQualifier(); 2551 if (EPI.ExceptionSpecType == EST_Dynamic) { 2552 EPI.NumExceptions = NumExceptions; 2553 EPI.Exceptions = exception_begin(); 2554 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2555 EPI.NoexceptExpr = getNoexceptExpr(); 2556 } 2557 return EPI; 2558 } 2559 2560 /// \brief Get the kind of exception specification on this function. 2561 ExceptionSpecificationType getExceptionSpecType() const { 2562 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2563 } 2564 /// \brief Return whether this function has any kind of exception spec. 2565 bool hasExceptionSpec() const { 2566 return getExceptionSpecType() != EST_None; 2567 } 2568 /// \brief Return whether this function has a dynamic (throw) exception spec. 2569 bool hasDynamicExceptionSpec() const { 2570 return isDynamicExceptionSpec(getExceptionSpecType()); 2571 } 2572 /// \brief Return whether this function has a noexcept exception spec. 2573 bool hasNoexceptExceptionSpec() const { 2574 return isNoexceptExceptionSpec(getExceptionSpecType()); 2575 } 2576 /// \brief Result type of getNoexceptSpec(). 2577 enum NoexceptResult { 2578 NR_NoNoexcept, ///< There is no noexcept specifier. 2579 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2580 NR_Dependent, ///< The noexcept specifier is dependent. 2581 NR_Throw, ///< The noexcept specifier evaluates to false. 2582 NR_Nothrow ///< The noexcept specifier evaluates to true. 2583 }; 2584 /// \brief Get the meaning of the noexcept spec on this function, if any. 2585 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2586 unsigned getNumExceptions() const { return NumExceptions; } 2587 QualType getExceptionType(unsigned i) const { 2588 assert(i < NumExceptions && "Invalid exception number!"); 2589 return exception_begin()[i]; 2590 } 2591 Expr *getNoexceptExpr() const { 2592 if (getExceptionSpecType() != EST_ComputedNoexcept) 2593 return 0; 2594 // NoexceptExpr sits where the arguments end. 2595 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2596 } 2597 bool isNothrow(ASTContext &Ctx) const { 2598 ExceptionSpecificationType EST = getExceptionSpecType(); 2599 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2600 return true; 2601 if (EST != EST_ComputedNoexcept) 2602 return false; 2603 return getNoexceptSpec(Ctx) == NR_Nothrow; 2604 } 2605 2606 using FunctionType::isVariadic; 2607 2608 /// \brief Determines whether this function prototype contains a 2609 /// parameter pack at the end. 2610 /// 2611 /// A function template whose last parameter is a parameter pack can be 2612 /// called with an arbitrary number of arguments, much like a variadic 2613 /// function. However, 2614 bool isTemplateVariadic() const; 2615 2616 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2617 2618 2619 /// \brief Retrieve the ref-qualifier associated with this function type. 2620 RefQualifierKind getRefQualifier() const { 2621 return FunctionType::getRefQualifier(); 2622 } 2623 2624 typedef const QualType *arg_type_iterator; 2625 arg_type_iterator arg_type_begin() const { 2626 return reinterpret_cast<const QualType *>(this+1); 2627 } 2628 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2629 2630 typedef const QualType *exception_iterator; 2631 exception_iterator exception_begin() const { 2632 // exceptions begin where arguments end 2633 return arg_type_end(); 2634 } 2635 exception_iterator exception_end() const { 2636 if (getExceptionSpecType() != EST_Dynamic) 2637 return exception_begin(); 2638 return exception_begin() + NumExceptions; 2639 } 2640 2641 bool isSugared() const { return false; } 2642 QualType desugar() const { return QualType(this, 0); } 2643 2644 static bool classof(const Type *T) { 2645 return T->getTypeClass() == FunctionProto; 2646 } 2647 static bool classof(const FunctionProtoType *) { return true; } 2648 2649 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2650 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2651 arg_type_iterator ArgTys, unsigned NumArgs, 2652 const ExtProtoInfo &EPI, const ASTContext &Context); 2653}; 2654 2655 2656/// \brief Represents the dependent type named by a dependently-scoped 2657/// typename using declaration, e.g. 2658/// using typename Base<T>::foo; 2659/// Template instantiation turns these into the underlying type. 2660class UnresolvedUsingType : public Type { 2661 UnresolvedUsingTypenameDecl *Decl; 2662 2663 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2664 : Type(UnresolvedUsing, QualType(), true, false, 2665 /*ContainsUnexpandedParameterPack=*/false), 2666 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2667 friend class ASTContext; // ASTContext creates these. 2668public: 2669 2670 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2671 2672 bool isSugared() const { return false; } 2673 QualType desugar() const { return QualType(this, 0); } 2674 2675 static bool classof(const Type *T) { 2676 return T->getTypeClass() == UnresolvedUsing; 2677 } 2678 static bool classof(const UnresolvedUsingType *) { return true; } 2679 2680 void Profile(llvm::FoldingSetNodeID &ID) { 2681 return Profile(ID, Decl); 2682 } 2683 static void Profile(llvm::FoldingSetNodeID &ID, 2684 UnresolvedUsingTypenameDecl *D) { 2685 ID.AddPointer(D); 2686 } 2687}; 2688 2689 2690class TypedefType : public Type { 2691 TypedefNameDecl *Decl; 2692protected: 2693 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2694 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2695 /*ContainsUnexpandedParameterPack=*/false), 2696 Decl(const_cast<TypedefNameDecl*>(D)) { 2697 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2698 } 2699 friend class ASTContext; // ASTContext creates these. 2700public: 2701 2702 TypedefNameDecl *getDecl() const { return Decl; } 2703 2704 bool isSugared() const { return true; } 2705 QualType desugar() const; 2706 2707 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2708 static bool classof(const TypedefType *) { return true; } 2709}; 2710 2711/// TypeOfExprType (GCC extension). 2712class TypeOfExprType : public Type { 2713 Expr *TOExpr; 2714 2715protected: 2716 TypeOfExprType(Expr *E, QualType can = QualType()); 2717 friend class ASTContext; // ASTContext creates these. 2718public: 2719 Expr *getUnderlyingExpr() const { return TOExpr; } 2720 2721 /// \brief Remove a single level of sugar. 2722 QualType desugar() const; 2723 2724 /// \brief Returns whether this type directly provides sugar. 2725 bool isSugared() const { return true; } 2726 2727 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2728 static bool classof(const TypeOfExprType *) { return true; } 2729}; 2730 2731/// \brief Internal representation of canonical, dependent 2732/// typeof(expr) types. 2733/// 2734/// This class is used internally by the ASTContext to manage 2735/// canonical, dependent types, only. Clients will only see instances 2736/// of this class via TypeOfExprType nodes. 2737class DependentTypeOfExprType 2738 : public TypeOfExprType, public llvm::FoldingSetNode { 2739 const ASTContext &Context; 2740 2741public: 2742 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2743 : TypeOfExprType(E), Context(Context) { } 2744 2745 bool isSugared() const { return false; } 2746 QualType desugar() const { return QualType(this, 0); } 2747 2748 void Profile(llvm::FoldingSetNodeID &ID) { 2749 Profile(ID, Context, getUnderlyingExpr()); 2750 } 2751 2752 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2753 Expr *E); 2754}; 2755 2756/// TypeOfType (GCC extension). 2757class TypeOfType : public Type { 2758 QualType TOType; 2759 TypeOfType(QualType T, QualType can) 2760 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2761 T->containsUnexpandedParameterPack()), 2762 TOType(T) { 2763 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2764 } 2765 friend class ASTContext; // ASTContext creates these. 2766public: 2767 QualType getUnderlyingType() const { return TOType; } 2768 2769 /// \brief Remove a single level of sugar. 2770 QualType desugar() const { return getUnderlyingType(); } 2771 2772 /// \brief Returns whether this type directly provides sugar. 2773 bool isSugared() const { return true; } 2774 2775 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2776 static bool classof(const TypeOfType *) { return true; } 2777}; 2778 2779/// DecltypeType (C++0x) 2780class DecltypeType : public Type { 2781 Expr *E; 2782 2783 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2784 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2785 // from it. 2786 QualType UnderlyingType; 2787 2788protected: 2789 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2790 friend class ASTContext; // ASTContext creates these. 2791public: 2792 Expr *getUnderlyingExpr() const { return E; } 2793 QualType getUnderlyingType() const { return UnderlyingType; } 2794 2795 /// \brief Remove a single level of sugar. 2796 QualType desugar() const { return getUnderlyingType(); } 2797 2798 /// \brief Returns whether this type directly provides sugar. 2799 bool isSugared() const { return !isDependentType(); } 2800 2801 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2802 static bool classof(const DecltypeType *) { return true; } 2803}; 2804 2805/// \brief Internal representation of canonical, dependent 2806/// decltype(expr) types. 2807/// 2808/// This class is used internally by the ASTContext to manage 2809/// canonical, dependent types, only. Clients will only see instances 2810/// of this class via DecltypeType nodes. 2811class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2812 const ASTContext &Context; 2813 2814public: 2815 DependentDecltypeType(const ASTContext &Context, Expr *E); 2816 2817 bool isSugared() const { return false; } 2818 QualType desugar() const { return QualType(this, 0); } 2819 2820 void Profile(llvm::FoldingSetNodeID &ID) { 2821 Profile(ID, Context, getUnderlyingExpr()); 2822 } 2823 2824 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2825 Expr *E); 2826}; 2827 2828/// \brief A unary type transform, which is a type constructed from another 2829class UnaryTransformType : public Type { 2830public: 2831 enum UTTKind { 2832 EnumUnderlyingType 2833 }; 2834 2835private: 2836 /// The untransformed type. 2837 QualType BaseType; 2838 /// The transformed type if not dependent, otherwise the same as BaseType. 2839 QualType UnderlyingType; 2840 2841 UTTKind UKind; 2842protected: 2843 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 2844 QualType CanonicalTy); 2845 friend class ASTContext; 2846public: 2847 bool isSugared() const { return !isDependentType(); } 2848 QualType desugar() const { return UnderlyingType; } 2849 2850 QualType getUnderlyingType() const { return UnderlyingType; } 2851 QualType getBaseType() const { return BaseType; } 2852 2853 UTTKind getUTTKind() const { return UKind; } 2854 2855 static bool classof(const Type *T) { 2856 return T->getTypeClass() == UnaryTransform; 2857 } 2858 static bool classof(const UnaryTransformType *) { return true; } 2859}; 2860 2861class TagType : public Type { 2862 /// Stores the TagDecl associated with this type. The decl may point to any 2863 /// TagDecl that declares the entity. 2864 TagDecl * decl; 2865 2866protected: 2867 TagType(TypeClass TC, const TagDecl *D, QualType can); 2868 2869public: 2870 TagDecl *getDecl() const; 2871 2872 /// @brief Determines whether this type is in the process of being 2873 /// defined. 2874 bool isBeingDefined() const; 2875 2876 static bool classof(const Type *T) { 2877 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2878 } 2879 static bool classof(const TagType *) { return true; } 2880 static bool classof(const RecordType *) { return true; } 2881 static bool classof(const EnumType *) { return true; } 2882}; 2883 2884/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2885/// to detect TagType objects of structs/unions/classes. 2886class RecordType : public TagType { 2887protected: 2888 explicit RecordType(const RecordDecl *D) 2889 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2890 explicit RecordType(TypeClass TC, RecordDecl *D) 2891 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2892 friend class ASTContext; // ASTContext creates these. 2893public: 2894 2895 RecordDecl *getDecl() const { 2896 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2897 } 2898 2899 // FIXME: This predicate is a helper to QualType/Type. It needs to 2900 // recursively check all fields for const-ness. If any field is declared 2901 // const, it needs to return false. 2902 bool hasConstFields() const { return false; } 2903 2904 bool isSugared() const { return false; } 2905 QualType desugar() const { return QualType(this, 0); } 2906 2907 static bool classof(const TagType *T); 2908 static bool classof(const Type *T) { 2909 return isa<TagType>(T) && classof(cast<TagType>(T)); 2910 } 2911 static bool classof(const RecordType *) { return true; } 2912}; 2913 2914/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2915/// to detect TagType objects of enums. 2916class EnumType : public TagType { 2917 explicit EnumType(const EnumDecl *D) 2918 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2919 friend class ASTContext; // ASTContext creates these. 2920public: 2921 2922 EnumDecl *getDecl() const { 2923 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2924 } 2925 2926 bool isSugared() const { return false; } 2927 QualType desugar() const { return QualType(this, 0); } 2928 2929 static bool classof(const TagType *T); 2930 static bool classof(const Type *T) { 2931 return isa<TagType>(T) && classof(cast<TagType>(T)); 2932 } 2933 static bool classof(const EnumType *) { return true; } 2934}; 2935 2936/// AttributedType - An attributed type is a type to which a type 2937/// attribute has been applied. The "modified type" is the 2938/// fully-sugared type to which the attributed type was applied; 2939/// generally it is not canonically equivalent to the attributed type. 2940/// The "equivalent type" is the minimally-desugared type which the 2941/// type is canonically equivalent to. 2942/// 2943/// For example, in the following attributed type: 2944/// int32_t __attribute__((vector_size(16))) 2945/// - the modified type is the TypedefType for int32_t 2946/// - the equivalent type is VectorType(16, int32_t) 2947/// - the canonical type is VectorType(16, int) 2948class AttributedType : public Type, public llvm::FoldingSetNode { 2949public: 2950 // It is really silly to have yet another attribute-kind enum, but 2951 // clang::attr::Kind doesn't currently cover the pure type attrs. 2952 enum Kind { 2953 // Expression operand. 2954 attr_address_space, 2955 attr_regparm, 2956 attr_vector_size, 2957 attr_neon_vector_type, 2958 attr_neon_polyvector_type, 2959 2960 FirstExprOperandKind = attr_address_space, 2961 LastExprOperandKind = attr_neon_polyvector_type, 2962 2963 // Enumerated operand (string or keyword). 2964 attr_objc_gc, 2965 attr_pcs, 2966 2967 FirstEnumOperandKind = attr_objc_gc, 2968 LastEnumOperandKind = attr_pcs, 2969 2970 // No operand. 2971 attr_noreturn, 2972 attr_cdecl, 2973 attr_fastcall, 2974 attr_stdcall, 2975 attr_thiscall, 2976 attr_pascal 2977 }; 2978 2979private: 2980 QualType ModifiedType; 2981 QualType EquivalentType; 2982 2983 friend class ASTContext; // creates these 2984 2985 AttributedType(QualType canon, Kind attrKind, 2986 QualType modified, QualType equivalent) 2987 : Type(Attributed, canon, canon->isDependentType(), 2988 canon->isVariablyModifiedType(), 2989 canon->containsUnexpandedParameterPack()), 2990 ModifiedType(modified), EquivalentType(equivalent) { 2991 AttributedTypeBits.AttrKind = attrKind; 2992 } 2993 2994public: 2995 Kind getAttrKind() const { 2996 return static_cast<Kind>(AttributedTypeBits.AttrKind); 2997 } 2998 2999 QualType getModifiedType() const { return ModifiedType; } 3000 QualType getEquivalentType() const { return EquivalentType; } 3001 3002 bool isSugared() const { return true; } 3003 QualType desugar() const { return getEquivalentType(); } 3004 3005 void Profile(llvm::FoldingSetNodeID &ID) { 3006 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3007 } 3008 3009 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3010 QualType modified, QualType equivalent) { 3011 ID.AddInteger(attrKind); 3012 ID.AddPointer(modified.getAsOpaquePtr()); 3013 ID.AddPointer(equivalent.getAsOpaquePtr()); 3014 } 3015 3016 static bool classof(const Type *T) { 3017 return T->getTypeClass() == Attributed; 3018 } 3019 static bool classof(const AttributedType *T) { return true; } 3020}; 3021 3022class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3023 // Helper data collector for canonical types. 3024 struct CanonicalTTPTInfo { 3025 unsigned Depth : 15; 3026 unsigned ParameterPack : 1; 3027 unsigned Index : 16; 3028 }; 3029 3030 union { 3031 // Info for the canonical type. 3032 CanonicalTTPTInfo CanTTPTInfo; 3033 // Info for the non-canonical type. 3034 TemplateTypeParmDecl *TTPDecl; 3035 }; 3036 3037 /// Build a non-canonical type. 3038 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3039 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3040 /*VariablyModified=*/false, 3041 Canon->containsUnexpandedParameterPack()), 3042 TTPDecl(TTPDecl) { } 3043 3044 /// Build the canonical type. 3045 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3046 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 3047 /*VariablyModified=*/false, PP) { 3048 CanTTPTInfo.Depth = D; 3049 CanTTPTInfo.Index = I; 3050 CanTTPTInfo.ParameterPack = PP; 3051 } 3052 3053 friend class ASTContext; // ASTContext creates these 3054 3055 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3056 QualType Can = getCanonicalTypeInternal(); 3057 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3058 } 3059 3060public: 3061 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3062 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3063 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3064 3065 TemplateTypeParmDecl *getDecl() const { 3066 return isCanonicalUnqualified() ? 0 : TTPDecl; 3067 } 3068 3069 IdentifierInfo *getIdentifier() const; 3070 3071 bool isSugared() const { return false; } 3072 QualType desugar() const { return QualType(this, 0); } 3073 3074 void Profile(llvm::FoldingSetNodeID &ID) { 3075 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3076 } 3077 3078 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3079 unsigned Index, bool ParameterPack, 3080 TemplateTypeParmDecl *TTPDecl) { 3081 ID.AddInteger(Depth); 3082 ID.AddInteger(Index); 3083 ID.AddBoolean(ParameterPack); 3084 ID.AddPointer(TTPDecl); 3085 } 3086 3087 static bool classof(const Type *T) { 3088 return T->getTypeClass() == TemplateTypeParm; 3089 } 3090 static bool classof(const TemplateTypeParmType *T) { return true; } 3091}; 3092 3093/// \brief Represents the result of substituting a type for a template 3094/// type parameter. 3095/// 3096/// Within an instantiated template, all template type parameters have 3097/// been replaced with these. They are used solely to record that a 3098/// type was originally written as a template type parameter; 3099/// therefore they are never canonical. 3100class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3101 // The original type parameter. 3102 const TemplateTypeParmType *Replaced; 3103 3104 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3105 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3106 Canon->isVariablyModifiedType(), 3107 Canon->containsUnexpandedParameterPack()), 3108 Replaced(Param) { } 3109 3110 friend class ASTContext; 3111 3112public: 3113 /// Gets the template parameter that was substituted for. 3114 const TemplateTypeParmType *getReplacedParameter() const { 3115 return Replaced; 3116 } 3117 3118 /// Gets the type that was substituted for the template 3119 /// parameter. 3120 QualType getReplacementType() const { 3121 return getCanonicalTypeInternal(); 3122 } 3123 3124 bool isSugared() const { return true; } 3125 QualType desugar() const { return getReplacementType(); } 3126 3127 void Profile(llvm::FoldingSetNodeID &ID) { 3128 Profile(ID, getReplacedParameter(), getReplacementType()); 3129 } 3130 static void Profile(llvm::FoldingSetNodeID &ID, 3131 const TemplateTypeParmType *Replaced, 3132 QualType Replacement) { 3133 ID.AddPointer(Replaced); 3134 ID.AddPointer(Replacement.getAsOpaquePtr()); 3135 } 3136 3137 static bool classof(const Type *T) { 3138 return T->getTypeClass() == SubstTemplateTypeParm; 3139 } 3140 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3141}; 3142 3143/// \brief Represents the result of substituting a set of types for a template 3144/// type parameter pack. 3145/// 3146/// When a pack expansion in the source code contains multiple parameter packs 3147/// and those parameter packs correspond to different levels of template 3148/// parameter lists, this type node is used to represent a template type 3149/// parameter pack from an outer level, which has already had its argument pack 3150/// substituted but that still lives within a pack expansion that itself 3151/// could not be instantiated. When actually performing a substitution into 3152/// that pack expansion (e.g., when all template parameters have corresponding 3153/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3154/// at the current pack substitution index. 3155class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3156 /// \brief The original type parameter. 3157 const TemplateTypeParmType *Replaced; 3158 3159 /// \brief A pointer to the set of template arguments that this 3160 /// parameter pack is instantiated with. 3161 const TemplateArgument *Arguments; 3162 3163 /// \brief The number of template arguments in \c Arguments. 3164 unsigned NumArguments; 3165 3166 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3167 QualType Canon, 3168 const TemplateArgument &ArgPack); 3169 3170 friend class ASTContext; 3171 3172public: 3173 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3174 3175 /// Gets the template parameter that was substituted for. 3176 const TemplateTypeParmType *getReplacedParameter() const { 3177 return Replaced; 3178 } 3179 3180 bool isSugared() const { return false; } 3181 QualType desugar() const { return QualType(this, 0); } 3182 3183 TemplateArgument getArgumentPack() const; 3184 3185 void Profile(llvm::FoldingSetNodeID &ID); 3186 static void Profile(llvm::FoldingSetNodeID &ID, 3187 const TemplateTypeParmType *Replaced, 3188 const TemplateArgument &ArgPack); 3189 3190 static bool classof(const Type *T) { 3191 return T->getTypeClass() == SubstTemplateTypeParmPack; 3192 } 3193 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3194}; 3195 3196/// \brief Represents a C++0x auto type. 3197/// 3198/// These types are usually a placeholder for a deduced type. However, within 3199/// templates and before the initializer is attached, there is no deduced type 3200/// and an auto type is type-dependent and canonical. 3201class AutoType : public Type, public llvm::FoldingSetNode { 3202 AutoType(QualType DeducedType) 3203 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3204 /*Dependent=*/DeducedType.isNull(), 3205 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3206 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3207 "deduced a dependent type for auto"); 3208 } 3209 3210 friend class ASTContext; // ASTContext creates these 3211 3212public: 3213 bool isSugared() const { return isDeduced(); } 3214 QualType desugar() const { return getCanonicalTypeInternal(); } 3215 3216 QualType getDeducedType() const { 3217 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3218 } 3219 bool isDeduced() const { 3220 return !isDependentType(); 3221 } 3222 3223 void Profile(llvm::FoldingSetNodeID &ID) { 3224 Profile(ID, getDeducedType()); 3225 } 3226 3227 static void Profile(llvm::FoldingSetNodeID &ID, 3228 QualType Deduced) { 3229 ID.AddPointer(Deduced.getAsOpaquePtr()); 3230 } 3231 3232 static bool classof(const Type *T) { 3233 return T->getTypeClass() == Auto; 3234 } 3235 static bool classof(const AutoType *T) { return true; } 3236}; 3237 3238/// \brief Represents the type of a template specialization as written 3239/// in the source code. 3240/// 3241/// Template specialization types represent the syntactic form of a 3242/// template-id that refers to a type, e.g., @c vector<int>. Some 3243/// template specialization types are syntactic sugar, whose canonical 3244/// type will point to some other type node that represents the 3245/// instantiation or class template specialization. For example, a 3246/// class template specialization type of @c vector<int> will refer to 3247/// a tag type for the instantiation 3248/// @c std::vector<int, std::allocator<int>>. 3249/// 3250/// Other template specialization types, for which the template name 3251/// is dependent, may be canonical types. These types are always 3252/// dependent. 3253/// 3254/// An instance of this type is followed by an array of TemplateArgument*s, 3255/// then, if the template specialization type is for a type alias template, 3256/// a QualType representing the non-canonical aliased type. 3257class TemplateSpecializationType 3258 : public Type, public llvm::FoldingSetNode { 3259 /// \brief The name of the template being specialized. 3260 TemplateName Template; 3261 3262 /// \brief - The number of template arguments named in this class 3263 /// template specialization. 3264 unsigned NumArgs; 3265 3266 TemplateSpecializationType(TemplateName T, 3267 const TemplateArgument *Args, 3268 unsigned NumArgs, QualType Canon, 3269 QualType Aliased); 3270 3271 friend class ASTContext; // ASTContext creates these 3272 3273public: 3274 /// \brief Determine whether any of the given template arguments are 3275 /// dependent. 3276 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3277 unsigned NumArgs); 3278 3279 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3280 unsigned NumArgs); 3281 3282 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 3283 3284 /// \brief Print a template argument list, including the '<' and '>' 3285 /// enclosing the template arguments. 3286 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3287 unsigned NumArgs, 3288 const PrintingPolicy &Policy, 3289 bool SkipBrackets = false); 3290 3291 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3292 unsigned NumArgs, 3293 const PrintingPolicy &Policy); 3294 3295 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3296 const PrintingPolicy &Policy); 3297 3298 /// True if this template specialization type matches a current 3299 /// instantiation in the context in which it is found. 3300 bool isCurrentInstantiation() const { 3301 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3302 } 3303 3304 /// True if this template specialization type is for a type alias 3305 /// template. 3306 bool isTypeAlias() const; 3307 /// Get the aliased type, if this is a specialization of a type alias 3308 /// template. 3309 QualType getAliasedType() const { 3310 assert(isTypeAlias() && "not a type alias template specialization"); 3311 return *reinterpret_cast<const QualType*>(end()); 3312 } 3313 3314 typedef const TemplateArgument * iterator; 3315 3316 iterator begin() const { return getArgs(); } 3317 iterator end() const; // defined inline in TemplateBase.h 3318 3319 /// \brief Retrieve the name of the template that we are specializing. 3320 TemplateName getTemplateName() const { return Template; } 3321 3322 /// \brief Retrieve the template arguments. 3323 const TemplateArgument *getArgs() const { 3324 return reinterpret_cast<const TemplateArgument *>(this + 1); 3325 } 3326 3327 /// \brief Retrieve the number of template arguments. 3328 unsigned getNumArgs() const { return NumArgs; } 3329 3330 /// \brief Retrieve a specific template argument as a type. 3331 /// \precondition @c isArgType(Arg) 3332 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3333 3334 bool isSugared() const { 3335 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3336 } 3337 QualType desugar() const { return getCanonicalTypeInternal(); } 3338 3339 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3340 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3341 if (isTypeAlias()) 3342 getAliasedType().Profile(ID); 3343 } 3344 3345 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3346 const TemplateArgument *Args, 3347 unsigned NumArgs, 3348 const ASTContext &Context); 3349 3350 static bool classof(const Type *T) { 3351 return T->getTypeClass() == TemplateSpecialization; 3352 } 3353 static bool classof(const TemplateSpecializationType *T) { return true; } 3354}; 3355 3356/// \brief The injected class name of a C++ class template or class 3357/// template partial specialization. Used to record that a type was 3358/// spelled with a bare identifier rather than as a template-id; the 3359/// equivalent for non-templated classes is just RecordType. 3360/// 3361/// Injected class name types are always dependent. Template 3362/// instantiation turns these into RecordTypes. 3363/// 3364/// Injected class name types are always canonical. This works 3365/// because it is impossible to compare an injected class name type 3366/// with the corresponding non-injected template type, for the same 3367/// reason that it is impossible to directly compare template 3368/// parameters from different dependent contexts: injected class name 3369/// types can only occur within the scope of a particular templated 3370/// declaration, and within that scope every template specialization 3371/// will canonicalize to the injected class name (when appropriate 3372/// according to the rules of the language). 3373class InjectedClassNameType : public Type { 3374 CXXRecordDecl *Decl; 3375 3376 /// The template specialization which this type represents. 3377 /// For example, in 3378 /// template <class T> class A { ... }; 3379 /// this is A<T>, whereas in 3380 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3381 /// this is A<B<X,Y> >. 3382 /// 3383 /// It is always unqualified, always a template specialization type, 3384 /// and always dependent. 3385 QualType InjectedType; 3386 3387 friend class ASTContext; // ASTContext creates these. 3388 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3389 // currently suitable for AST reading, too much 3390 // interdependencies. 3391 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3392 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3393 /*VariablyModified=*/false, 3394 /*ContainsUnexpandedParameterPack=*/false), 3395 Decl(D), InjectedType(TST) { 3396 assert(isa<TemplateSpecializationType>(TST)); 3397 assert(!TST.hasQualifiers()); 3398 assert(TST->isDependentType()); 3399 } 3400 3401public: 3402 QualType getInjectedSpecializationType() const { return InjectedType; } 3403 const TemplateSpecializationType *getInjectedTST() const { 3404 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3405 } 3406 3407 CXXRecordDecl *getDecl() const; 3408 3409 bool isSugared() const { return false; } 3410 QualType desugar() const { return QualType(this, 0); } 3411 3412 static bool classof(const Type *T) { 3413 return T->getTypeClass() == InjectedClassName; 3414 } 3415 static bool classof(const InjectedClassNameType *T) { return true; } 3416}; 3417 3418/// \brief The kind of a tag type. 3419enum TagTypeKind { 3420 /// \brief The "struct" keyword. 3421 TTK_Struct, 3422 /// \brief The "union" keyword. 3423 TTK_Union, 3424 /// \brief The "class" keyword. 3425 TTK_Class, 3426 /// \brief The "enum" keyword. 3427 TTK_Enum 3428}; 3429 3430/// \brief The elaboration keyword that precedes a qualified type name or 3431/// introduces an elaborated-type-specifier. 3432enum ElaboratedTypeKeyword { 3433 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3434 ETK_Struct, 3435 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3436 ETK_Union, 3437 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3438 ETK_Class, 3439 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3440 ETK_Enum, 3441 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3442 /// \c typename T::type. 3443 ETK_Typename, 3444 /// \brief No keyword precedes the qualified type name. 3445 ETK_None 3446}; 3447 3448/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3449/// The keyword in stored in the free bits of the base class. 3450/// Also provides a few static helpers for converting and printing 3451/// elaborated type keyword and tag type kind enumerations. 3452class TypeWithKeyword : public Type { 3453protected: 3454 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3455 QualType Canonical, bool Dependent, bool VariablyModified, 3456 bool ContainsUnexpandedParameterPack) 3457 : Type(tc, Canonical, Dependent, VariablyModified, 3458 ContainsUnexpandedParameterPack) { 3459 TypeWithKeywordBits.Keyword = Keyword; 3460 } 3461 3462public: 3463 ElaboratedTypeKeyword getKeyword() const { 3464 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3465 } 3466 3467 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3468 /// into an elaborated type keyword. 3469 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3470 3471 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3472 /// into a tag type kind. It is an error to provide a type specifier 3473 /// which *isn't* a tag kind here. 3474 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3475 3476 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3477 /// elaborated type keyword. 3478 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3479 3480 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3481 // a TagTypeKind. It is an error to provide an elaborated type keyword 3482 /// which *isn't* a tag kind here. 3483 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3484 3485 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3486 3487 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3488 3489 static const char *getTagTypeKindName(TagTypeKind Kind) { 3490 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3491 } 3492 3493 class CannotCastToThisType {}; 3494 static CannotCastToThisType classof(const Type *); 3495}; 3496 3497/// \brief Represents a type that was referred to using an elaborated type 3498/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3499/// or both. 3500/// 3501/// This type is used to keep track of a type name as written in the 3502/// source code, including tag keywords and any nested-name-specifiers. 3503/// The type itself is always "sugar", used to express what was written 3504/// in the source code but containing no additional semantic information. 3505class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3506 3507 /// \brief The nested name specifier containing the qualifier. 3508 NestedNameSpecifier *NNS; 3509 3510 /// \brief The type that this qualified name refers to. 3511 QualType NamedType; 3512 3513 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3514 QualType NamedType, QualType CanonType) 3515 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3516 NamedType->isDependentType(), 3517 NamedType->isVariablyModifiedType(), 3518 NamedType->containsUnexpandedParameterPack()), 3519 NNS(NNS), NamedType(NamedType) { 3520 assert(!(Keyword == ETK_None && NNS == 0) && 3521 "ElaboratedType cannot have elaborated type keyword " 3522 "and name qualifier both null."); 3523 } 3524 3525 friend class ASTContext; // ASTContext creates these 3526 3527public: 3528 ~ElaboratedType(); 3529 3530 /// \brief Retrieve the qualification on this type. 3531 NestedNameSpecifier *getQualifier() const { return NNS; } 3532 3533 /// \brief Retrieve the type named by the qualified-id. 3534 QualType getNamedType() const { return NamedType; } 3535 3536 /// \brief Remove a single level of sugar. 3537 QualType desugar() const { return getNamedType(); } 3538 3539 /// \brief Returns whether this type directly provides sugar. 3540 bool isSugared() const { return true; } 3541 3542 void Profile(llvm::FoldingSetNodeID &ID) { 3543 Profile(ID, getKeyword(), NNS, NamedType); 3544 } 3545 3546 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3547 NestedNameSpecifier *NNS, QualType NamedType) { 3548 ID.AddInteger(Keyword); 3549 ID.AddPointer(NNS); 3550 NamedType.Profile(ID); 3551 } 3552 3553 static bool classof(const Type *T) { 3554 return T->getTypeClass() == Elaborated; 3555 } 3556 static bool classof(const ElaboratedType *T) { return true; } 3557}; 3558 3559/// \brief Represents a qualified type name for which the type name is 3560/// dependent. 3561/// 3562/// DependentNameType represents a class of dependent types that involve a 3563/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3564/// name of a type. The DependentNameType may start with a "typename" (for a 3565/// typename-specifier), "class", "struct", "union", or "enum" (for a 3566/// dependent elaborated-type-specifier), or nothing (in contexts where we 3567/// know that we must be referring to a type, e.g., in a base class specifier). 3568class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3569 3570 /// \brief The nested name specifier containing the qualifier. 3571 NestedNameSpecifier *NNS; 3572 3573 /// \brief The type that this typename specifier refers to. 3574 const IdentifierInfo *Name; 3575 3576 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3577 const IdentifierInfo *Name, QualType CanonType) 3578 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3579 /*VariablyModified=*/false, 3580 NNS->containsUnexpandedParameterPack()), 3581 NNS(NNS), Name(Name) { 3582 assert(NNS->isDependent() && 3583 "DependentNameType requires a dependent nested-name-specifier"); 3584 } 3585 3586 friend class ASTContext; // ASTContext creates these 3587 3588public: 3589 /// \brief Retrieve the qualification on this type. 3590 NestedNameSpecifier *getQualifier() const { return NNS; } 3591 3592 /// \brief Retrieve the type named by the typename specifier as an 3593 /// identifier. 3594 /// 3595 /// This routine will return a non-NULL identifier pointer when the 3596 /// form of the original typename was terminated by an identifier, 3597 /// e.g., "typename T::type". 3598 const IdentifierInfo *getIdentifier() const { 3599 return Name; 3600 } 3601 3602 bool isSugared() const { return false; } 3603 QualType desugar() const { return QualType(this, 0); } 3604 3605 void Profile(llvm::FoldingSetNodeID &ID) { 3606 Profile(ID, getKeyword(), NNS, Name); 3607 } 3608 3609 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3610 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3611 ID.AddInteger(Keyword); 3612 ID.AddPointer(NNS); 3613 ID.AddPointer(Name); 3614 } 3615 3616 static bool classof(const Type *T) { 3617 return T->getTypeClass() == DependentName; 3618 } 3619 static bool classof(const DependentNameType *T) { return true; } 3620}; 3621 3622/// DependentTemplateSpecializationType - Represents a template 3623/// specialization type whose template cannot be resolved, e.g. 3624/// A<T>::template B<T> 3625class DependentTemplateSpecializationType : 3626 public TypeWithKeyword, public llvm::FoldingSetNode { 3627 3628 /// \brief The nested name specifier containing the qualifier. 3629 NestedNameSpecifier *NNS; 3630 3631 /// \brief The identifier of the template. 3632 const IdentifierInfo *Name; 3633 3634 /// \brief - The number of template arguments named in this class 3635 /// template specialization. 3636 unsigned NumArgs; 3637 3638 const TemplateArgument *getArgBuffer() const { 3639 return reinterpret_cast<const TemplateArgument*>(this+1); 3640 } 3641 TemplateArgument *getArgBuffer() { 3642 return reinterpret_cast<TemplateArgument*>(this+1); 3643 } 3644 3645 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3646 NestedNameSpecifier *NNS, 3647 const IdentifierInfo *Name, 3648 unsigned NumArgs, 3649 const TemplateArgument *Args, 3650 QualType Canon); 3651 3652 friend class ASTContext; // ASTContext creates these 3653 3654public: 3655 NestedNameSpecifier *getQualifier() const { return NNS; } 3656 const IdentifierInfo *getIdentifier() const { return Name; } 3657 3658 /// \brief Retrieve the template arguments. 3659 const TemplateArgument *getArgs() const { 3660 return getArgBuffer(); 3661 } 3662 3663 /// \brief Retrieve the number of template arguments. 3664 unsigned getNumArgs() const { return NumArgs; } 3665 3666 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3667 3668 typedef const TemplateArgument * iterator; 3669 iterator begin() const { return getArgs(); } 3670 iterator end() const; // inline in TemplateBase.h 3671 3672 bool isSugared() const { return false; } 3673 QualType desugar() const { return QualType(this, 0); } 3674 3675 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3676 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3677 } 3678 3679 static void Profile(llvm::FoldingSetNodeID &ID, 3680 const ASTContext &Context, 3681 ElaboratedTypeKeyword Keyword, 3682 NestedNameSpecifier *Qualifier, 3683 const IdentifierInfo *Name, 3684 unsigned NumArgs, 3685 const TemplateArgument *Args); 3686 3687 static bool classof(const Type *T) { 3688 return T->getTypeClass() == DependentTemplateSpecialization; 3689 } 3690 static bool classof(const DependentTemplateSpecializationType *T) { 3691 return true; 3692 } 3693}; 3694 3695/// \brief Represents a pack expansion of types. 3696/// 3697/// Pack expansions are part of C++0x variadic templates. A pack 3698/// expansion contains a pattern, which itself contains one or more 3699/// "unexpanded" parameter packs. When instantiated, a pack expansion 3700/// produces a series of types, each instantiated from the pattern of 3701/// the expansion, where the Ith instantiation of the pattern uses the 3702/// Ith arguments bound to each of the unexpanded parameter packs. The 3703/// pack expansion is considered to "expand" these unexpanded 3704/// parameter packs. 3705/// 3706/// \code 3707/// template<typename ...Types> struct tuple; 3708/// 3709/// template<typename ...Types> 3710/// struct tuple_of_references { 3711/// typedef tuple<Types&...> type; 3712/// }; 3713/// \endcode 3714/// 3715/// Here, the pack expansion \c Types&... is represented via a 3716/// PackExpansionType whose pattern is Types&. 3717class PackExpansionType : public Type, public llvm::FoldingSetNode { 3718 /// \brief The pattern of the pack expansion. 3719 QualType Pattern; 3720 3721 /// \brief The number of expansions that this pack expansion will 3722 /// generate when substituted (+1), or indicates that 3723 /// 3724 /// This field will only have a non-zero value when some of the parameter 3725 /// packs that occur within the pattern have been substituted but others have 3726 /// not. 3727 unsigned NumExpansions; 3728 3729 PackExpansionType(QualType Pattern, QualType Canon, 3730 llvm::Optional<unsigned> NumExpansions) 3731 : Type(PackExpansion, Canon, /*Dependent=*/true, 3732 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3733 /*ContainsUnexpandedParameterPack=*/false), 3734 Pattern(Pattern), 3735 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3736 3737 friend class ASTContext; // ASTContext creates these 3738 3739public: 3740 /// \brief Retrieve the pattern of this pack expansion, which is the 3741 /// type that will be repeatedly instantiated when instantiating the 3742 /// pack expansion itself. 3743 QualType getPattern() const { return Pattern; } 3744 3745 /// \brief Retrieve the number of expansions that this pack expansion will 3746 /// generate, if known. 3747 llvm::Optional<unsigned> getNumExpansions() const { 3748 if (NumExpansions) 3749 return NumExpansions - 1; 3750 3751 return llvm::Optional<unsigned>(); 3752 } 3753 3754 bool isSugared() const { return false; } 3755 QualType desugar() const { return QualType(this, 0); } 3756 3757 void Profile(llvm::FoldingSetNodeID &ID) { 3758 Profile(ID, getPattern(), getNumExpansions()); 3759 } 3760 3761 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3762 llvm::Optional<unsigned> NumExpansions) { 3763 ID.AddPointer(Pattern.getAsOpaquePtr()); 3764 ID.AddBoolean(NumExpansions); 3765 if (NumExpansions) 3766 ID.AddInteger(*NumExpansions); 3767 } 3768 3769 static bool classof(const Type *T) { 3770 return T->getTypeClass() == PackExpansion; 3771 } 3772 static bool classof(const PackExpansionType *T) { 3773 return true; 3774 } 3775}; 3776 3777/// ObjCObjectType - Represents a class type in Objective C. 3778/// Every Objective C type is a combination of a base type and a 3779/// list of protocols. 3780/// 3781/// Given the following declarations: 3782/// @class C; 3783/// @protocol P; 3784/// 3785/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3786/// with base C and no protocols. 3787/// 3788/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3789/// 3790/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3791/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3792/// and no protocols. 3793/// 3794/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3795/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3796/// this should get its own sugar class to better represent the source. 3797class ObjCObjectType : public Type { 3798 // ObjCObjectType.NumProtocols - the number of protocols stored 3799 // after the ObjCObjectPointerType node. 3800 // 3801 // These protocols are those written directly on the type. If 3802 // protocol qualifiers ever become additive, the iterators will need 3803 // to get kindof complicated. 3804 // 3805 // In the canonical object type, these are sorted alphabetically 3806 // and uniqued. 3807 3808 /// Either a BuiltinType or an InterfaceType or sugar for either. 3809 QualType BaseType; 3810 3811 ObjCProtocolDecl * const *getProtocolStorage() const { 3812 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3813 } 3814 3815 ObjCProtocolDecl **getProtocolStorage(); 3816 3817protected: 3818 ObjCObjectType(QualType Canonical, QualType Base, 3819 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3820 3821 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3822 ObjCObjectType(enum Nonce_ObjCInterface) 3823 : Type(ObjCInterface, QualType(), false, false, false), 3824 BaseType(QualType(this_(), 0)) { 3825 ObjCObjectTypeBits.NumProtocols = 0; 3826 } 3827 3828public: 3829 /// getBaseType - Gets the base type of this object type. This is 3830 /// always (possibly sugar for) one of: 3831 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3832 /// user, which is a typedef for an ObjCPointerType) 3833 /// - the 'Class' builtin type (same caveat) 3834 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3835 QualType getBaseType() const { return BaseType; } 3836 3837 bool isObjCId() const { 3838 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3839 } 3840 bool isObjCClass() const { 3841 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3842 } 3843 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3844 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3845 bool isObjCUnqualifiedIdOrClass() const { 3846 if (!qual_empty()) return false; 3847 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3848 return T->getKind() == BuiltinType::ObjCId || 3849 T->getKind() == BuiltinType::ObjCClass; 3850 return false; 3851 } 3852 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3853 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3854 3855 /// Gets the interface declaration for this object type, if the base type 3856 /// really is an interface. 3857 ObjCInterfaceDecl *getInterface() const; 3858 3859 typedef ObjCProtocolDecl * const *qual_iterator; 3860 3861 qual_iterator qual_begin() const { return getProtocolStorage(); } 3862 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3863 3864 bool qual_empty() const { return getNumProtocols() == 0; } 3865 3866 /// getNumProtocols - Return the number of qualifying protocols in this 3867 /// interface type, or 0 if there are none. 3868 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3869 3870 /// \brief Fetch a protocol by index. 3871 ObjCProtocolDecl *getProtocol(unsigned I) const { 3872 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3873 return qual_begin()[I]; 3874 } 3875 3876 bool isSugared() const { return false; } 3877 QualType desugar() const { return QualType(this, 0); } 3878 3879 static bool classof(const Type *T) { 3880 return T->getTypeClass() == ObjCObject || 3881 T->getTypeClass() == ObjCInterface; 3882 } 3883 static bool classof(const ObjCObjectType *) { return true; } 3884}; 3885 3886/// ObjCObjectTypeImpl - A class providing a concrete implementation 3887/// of ObjCObjectType, so as to not increase the footprint of 3888/// ObjCInterfaceType. Code outside of ASTContext and the core type 3889/// system should not reference this type. 3890class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3891 friend class ASTContext; 3892 3893 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3894 // will need to be modified. 3895 3896 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3897 ObjCProtocolDecl * const *Protocols, 3898 unsigned NumProtocols) 3899 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3900 3901public: 3902 void Profile(llvm::FoldingSetNodeID &ID); 3903 static void Profile(llvm::FoldingSetNodeID &ID, 3904 QualType Base, 3905 ObjCProtocolDecl *const *protocols, 3906 unsigned NumProtocols); 3907}; 3908 3909inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3910 return reinterpret_cast<ObjCProtocolDecl**>( 3911 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3912} 3913 3914/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3915/// object oriented design. They basically correspond to C++ classes. There 3916/// are two kinds of interface types, normal interfaces like "NSString" and 3917/// qualified interfaces, which are qualified with a protocol list like 3918/// "NSString<NSCopyable, NSAmazing>". 3919/// 3920/// ObjCInterfaceType guarantees the following properties when considered 3921/// as a subtype of its superclass, ObjCObjectType: 3922/// - There are no protocol qualifiers. To reinforce this, code which 3923/// tries to invoke the protocol methods via an ObjCInterfaceType will 3924/// fail to compile. 3925/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3926/// T->getBaseType() == QualType(T, 0). 3927class ObjCInterfaceType : public ObjCObjectType { 3928 ObjCInterfaceDecl *Decl; 3929 3930 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3931 : ObjCObjectType(Nonce_ObjCInterface), 3932 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3933 friend class ASTContext; // ASTContext creates these. 3934 3935public: 3936 /// getDecl - Get the declaration of this interface. 3937 ObjCInterfaceDecl *getDecl() const { return Decl; } 3938 3939 bool isSugared() const { return false; } 3940 QualType desugar() const { return QualType(this, 0); } 3941 3942 static bool classof(const Type *T) { 3943 return T->getTypeClass() == ObjCInterface; 3944 } 3945 static bool classof(const ObjCInterfaceType *) { return true; } 3946 3947 // Nonsense to "hide" certain members of ObjCObjectType within this 3948 // class. People asking for protocols on an ObjCInterfaceType are 3949 // not going to get what they want: ObjCInterfaceTypes are 3950 // guaranteed to have no protocols. 3951 enum { 3952 qual_iterator, 3953 qual_begin, 3954 qual_end, 3955 getNumProtocols, 3956 getProtocol 3957 }; 3958}; 3959 3960inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3961 if (const ObjCInterfaceType *T = 3962 getBaseType()->getAs<ObjCInterfaceType>()) 3963 return T->getDecl(); 3964 return 0; 3965} 3966 3967/// ObjCObjectPointerType - Used to represent a pointer to an 3968/// Objective C object. These are constructed from pointer 3969/// declarators when the pointee type is an ObjCObjectType (or sugar 3970/// for one). In addition, the 'id' and 'Class' types are typedefs 3971/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3972/// are translated into these. 3973/// 3974/// Pointers to pointers to Objective C objects are still PointerTypes; 3975/// only the first level of pointer gets it own type implementation. 3976class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3977 QualType PointeeType; 3978 3979 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3980 : Type(ObjCObjectPointer, Canonical, false, false, false), 3981 PointeeType(Pointee) {} 3982 friend class ASTContext; // ASTContext creates these. 3983 3984public: 3985 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3986 /// The result will always be an ObjCObjectType or sugar thereof. 3987 QualType getPointeeType() const { return PointeeType; } 3988 3989 /// getObjCObjectType - Gets the type pointed to by this ObjC 3990 /// pointer. This method always returns non-null. 3991 /// 3992 /// This method is equivalent to getPointeeType() except that 3993 /// it discards any typedefs (or other sugar) between this 3994 /// type and the "outermost" object type. So for: 3995 /// @class A; @protocol P; @protocol Q; 3996 /// typedef A<P> AP; 3997 /// typedef A A1; 3998 /// typedef A1<P> A1P; 3999 /// typedef A1P<Q> A1PQ; 4000 /// For 'A*', getObjectType() will return 'A'. 4001 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4002 /// For 'AP*', getObjectType() will return 'A<P>'. 4003 /// For 'A1*', getObjectType() will return 'A'. 4004 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4005 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4006 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4007 /// adding protocols to a protocol-qualified base discards the 4008 /// old qualifiers (for now). But if it didn't, getObjectType() 4009 /// would return 'A1P<Q>' (and we'd have to make iterating over 4010 /// qualifiers more complicated). 4011 const ObjCObjectType *getObjectType() const { 4012 return PointeeType->castAs<ObjCObjectType>(); 4013 } 4014 4015 /// getInterfaceType - If this pointer points to an Objective C 4016 /// @interface type, gets the type for that interface. Any protocol 4017 /// qualifiers on the interface are ignored. 4018 /// 4019 /// \return null if the base type for this pointer is 'id' or 'Class' 4020 const ObjCInterfaceType *getInterfaceType() const { 4021 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4022 } 4023 4024 /// getInterfaceDecl - If this pointer points to an Objective @interface 4025 /// type, gets the declaration for that interface. 4026 /// 4027 /// \return null if the base type for this pointer is 'id' or 'Class' 4028 ObjCInterfaceDecl *getInterfaceDecl() const { 4029 return getObjectType()->getInterface(); 4030 } 4031 4032 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4033 /// its object type is the primitive 'id' type with no protocols. 4034 bool isObjCIdType() const { 4035 return getObjectType()->isObjCUnqualifiedId(); 4036 } 4037 4038 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4039 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4040 bool isObjCClassType() const { 4041 return getObjectType()->isObjCUnqualifiedClass(); 4042 } 4043 4044 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4045 /// non-empty set of protocols. 4046 bool isObjCQualifiedIdType() const { 4047 return getObjectType()->isObjCQualifiedId(); 4048 } 4049 4050 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4051 /// some non-empty set of protocols. 4052 bool isObjCQualifiedClassType() const { 4053 return getObjectType()->isObjCQualifiedClass(); 4054 } 4055 4056 /// An iterator over the qualifiers on the object type. Provided 4057 /// for convenience. This will always iterate over the full set of 4058 /// protocols on a type, not just those provided directly. 4059 typedef ObjCObjectType::qual_iterator qual_iterator; 4060 4061 qual_iterator qual_begin() const { 4062 return getObjectType()->qual_begin(); 4063 } 4064 qual_iterator qual_end() const { 4065 return getObjectType()->qual_end(); 4066 } 4067 bool qual_empty() const { return getObjectType()->qual_empty(); } 4068 4069 /// getNumProtocols - Return the number of qualifying protocols on 4070 /// the object type. 4071 unsigned getNumProtocols() const { 4072 return getObjectType()->getNumProtocols(); 4073 } 4074 4075 /// \brief Retrieve a qualifying protocol by index on the object 4076 /// type. 4077 ObjCProtocolDecl *getProtocol(unsigned I) const { 4078 return getObjectType()->getProtocol(I); 4079 } 4080 4081 bool isSugared() const { return false; } 4082 QualType desugar() const { return QualType(this, 0); } 4083 4084 void Profile(llvm::FoldingSetNodeID &ID) { 4085 Profile(ID, getPointeeType()); 4086 } 4087 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4088 ID.AddPointer(T.getAsOpaquePtr()); 4089 } 4090 static bool classof(const Type *T) { 4091 return T->getTypeClass() == ObjCObjectPointer; 4092 } 4093 static bool classof(const ObjCObjectPointerType *) { return true; } 4094}; 4095 4096/// A qualifier set is used to build a set of qualifiers. 4097class QualifierCollector : public Qualifiers { 4098public: 4099 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4100 4101 /// Collect any qualifiers on the given type and return an 4102 /// unqualified type. The qualifiers are assumed to be consistent 4103 /// with those already in the type. 4104 const Type *strip(QualType type) { 4105 addFastQualifiers(type.getLocalFastQualifiers()); 4106 if (!type.hasLocalNonFastQualifiers()) 4107 return type.getTypePtrUnsafe(); 4108 4109 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4110 addConsistentQualifiers(extQuals->getQualifiers()); 4111 return extQuals->getBaseType(); 4112 } 4113 4114 /// Apply the collected qualifiers to the given type. 4115 QualType apply(const ASTContext &Context, QualType QT) const; 4116 4117 /// Apply the collected qualifiers to the given type. 4118 QualType apply(const ASTContext &Context, const Type* T) const; 4119}; 4120 4121 4122// Inline function definitions. 4123 4124inline const Type *QualType::getTypePtr() const { 4125 return getCommonPtr()->BaseType; 4126} 4127 4128inline const Type *QualType::getTypePtrOrNull() const { 4129 return (isNull() ? 0 : getCommonPtr()->BaseType); 4130} 4131 4132inline SplitQualType QualType::split() const { 4133 if (!hasLocalNonFastQualifiers()) 4134 return SplitQualType(getTypePtrUnsafe(), 4135 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4136 4137 const ExtQuals *eq = getExtQualsUnsafe(); 4138 Qualifiers qs = eq->getQualifiers(); 4139 qs.addFastQualifiers(getLocalFastQualifiers()); 4140 return SplitQualType(eq->getBaseType(), qs); 4141} 4142 4143inline Qualifiers QualType::getLocalQualifiers() const { 4144 Qualifiers Quals; 4145 if (hasLocalNonFastQualifiers()) 4146 Quals = getExtQualsUnsafe()->getQualifiers(); 4147 Quals.addFastQualifiers(getLocalFastQualifiers()); 4148 return Quals; 4149} 4150 4151inline Qualifiers QualType::getQualifiers() const { 4152 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4153 quals.addFastQualifiers(getLocalFastQualifiers()); 4154 return quals; 4155} 4156 4157inline unsigned QualType::getCVRQualifiers() const { 4158 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4159 cvr |= getLocalCVRQualifiers(); 4160 return cvr; 4161} 4162 4163inline QualType QualType::getCanonicalType() const { 4164 QualType canon = getCommonPtr()->CanonicalType; 4165 return canon.withFastQualifiers(getLocalFastQualifiers()); 4166} 4167 4168inline bool QualType::isCanonical() const { 4169 return getTypePtr()->isCanonicalUnqualified(); 4170} 4171 4172inline bool QualType::isCanonicalAsParam() const { 4173 if (!isCanonical()) return false; 4174 if (hasLocalQualifiers()) return false; 4175 4176 const Type *T = getTypePtr(); 4177 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4178 return false; 4179 4180 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4181} 4182 4183inline bool QualType::isConstQualified() const { 4184 return isLocalConstQualified() || 4185 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4186} 4187 4188inline bool QualType::isRestrictQualified() const { 4189 return isLocalRestrictQualified() || 4190 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4191} 4192 4193 4194inline bool QualType::isVolatileQualified() const { 4195 return isLocalVolatileQualified() || 4196 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4197} 4198 4199inline bool QualType::hasQualifiers() const { 4200 return hasLocalQualifiers() || 4201 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4202} 4203 4204inline QualType QualType::getUnqualifiedType() const { 4205 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4206 return QualType(getTypePtr(), 0); 4207 4208 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4209} 4210 4211inline SplitQualType QualType::getSplitUnqualifiedType() const { 4212 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4213 return split(); 4214 4215 return getSplitUnqualifiedTypeImpl(*this); 4216} 4217 4218inline void QualType::removeLocalConst() { 4219 removeLocalFastQualifiers(Qualifiers::Const); 4220} 4221 4222inline void QualType::removeLocalRestrict() { 4223 removeLocalFastQualifiers(Qualifiers::Restrict); 4224} 4225 4226inline void QualType::removeLocalVolatile() { 4227 removeLocalFastQualifiers(Qualifiers::Volatile); 4228} 4229 4230inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4231 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4232 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4233 4234 // Fast path: we don't need to touch the slow qualifiers. 4235 removeLocalFastQualifiers(Mask); 4236} 4237 4238/// getAddressSpace - Return the address space of this type. 4239inline unsigned QualType::getAddressSpace() const { 4240 return getQualifiers().getAddressSpace(); 4241} 4242 4243/// getObjCGCAttr - Return the gc attribute of this type. 4244inline Qualifiers::GC QualType::getObjCGCAttr() const { 4245 return getQualifiers().getObjCGCAttr(); 4246} 4247 4248inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4249 if (const PointerType *PT = t.getAs<PointerType>()) { 4250 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4251 return FT->getExtInfo(); 4252 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4253 return FT->getExtInfo(); 4254 4255 return FunctionType::ExtInfo(); 4256} 4257 4258inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4259 return getFunctionExtInfo(*t); 4260} 4261 4262/// isMoreQualifiedThan - Determine whether this type is more 4263/// qualified than the Other type. For example, "const volatile int" 4264/// is more qualified than "const int", "volatile int", and 4265/// "int". However, it is not more qualified than "const volatile 4266/// int". 4267inline bool QualType::isMoreQualifiedThan(QualType other) const { 4268 Qualifiers myQuals = getQualifiers(); 4269 Qualifiers otherQuals = other.getQualifiers(); 4270 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4271} 4272 4273/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4274/// as qualified as the Other type. For example, "const volatile 4275/// int" is at least as qualified as "const int", "volatile int", 4276/// "int", and "const volatile int". 4277inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4278 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4279} 4280 4281/// getNonReferenceType - If Type is a reference type (e.g., const 4282/// int&), returns the type that the reference refers to ("const 4283/// int"). Otherwise, returns the type itself. This routine is used 4284/// throughout Sema to implement C++ 5p6: 4285/// 4286/// If an expression initially has the type "reference to T" (8.3.2, 4287/// 8.5.3), the type is adjusted to "T" prior to any further 4288/// analysis, the expression designates the object or function 4289/// denoted by the reference, and the expression is an lvalue. 4290inline QualType QualType::getNonReferenceType() const { 4291 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4292 return RefType->getPointeeType(); 4293 else 4294 return *this; 4295} 4296 4297/// \brief Tests whether the type is categorized as a fundamental type. 4298/// 4299/// \returns True for types specified in C++0x [basic.fundamental]. 4300inline bool Type::isFundamentalType() const { 4301 return isVoidType() || 4302 // FIXME: It's really annoying that we don't have an 4303 // 'isArithmeticType()' which agrees with the standard definition. 4304 (isArithmeticType() && !isEnumeralType()); 4305} 4306 4307/// \brief Tests whether the type is categorized as a compound type. 4308/// 4309/// \returns True for types specified in C++0x [basic.compound]. 4310inline bool Type::isCompoundType() const { 4311 // C++0x [basic.compound]p1: 4312 // Compound types can be constructed in the following ways: 4313 // -- arrays of objects of a given type [...]; 4314 return isArrayType() || 4315 // -- functions, which have parameters of given types [...]; 4316 isFunctionType() || 4317 // -- pointers to void or objects or functions [...]; 4318 isPointerType() || 4319 // -- references to objects or functions of a given type. [...] 4320 isReferenceType() || 4321 // -- classes containing a sequence of objects of various types, [...]; 4322 isRecordType() || 4323 // -- unions, which ar classes capable of containing objects of different types at different times; 4324 isUnionType() || 4325 // -- enumerations, which comprise a set of named constant values. [...]; 4326 isEnumeralType() || 4327 // -- pointers to non-static class members, [...]. 4328 isMemberPointerType(); 4329} 4330 4331inline bool Type::isFunctionType() const { 4332 return isa<FunctionType>(CanonicalType); 4333} 4334inline bool Type::isPointerType() const { 4335 return isa<PointerType>(CanonicalType); 4336} 4337inline bool Type::isAnyPointerType() const { 4338 return isPointerType() || isObjCObjectPointerType(); 4339} 4340inline bool Type::isBlockPointerType() const { 4341 return isa<BlockPointerType>(CanonicalType); 4342} 4343inline bool Type::isReferenceType() const { 4344 return isa<ReferenceType>(CanonicalType); 4345} 4346inline bool Type::isLValueReferenceType() const { 4347 return isa<LValueReferenceType>(CanonicalType); 4348} 4349inline bool Type::isRValueReferenceType() const { 4350 return isa<RValueReferenceType>(CanonicalType); 4351} 4352inline bool Type::isFunctionPointerType() const { 4353 if (const PointerType *T = getAs<PointerType>()) 4354 return T->getPointeeType()->isFunctionType(); 4355 else 4356 return false; 4357} 4358inline bool Type::isMemberPointerType() const { 4359 return isa<MemberPointerType>(CanonicalType); 4360} 4361inline bool Type::isMemberFunctionPointerType() const { 4362 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4363 return T->isMemberFunctionPointer(); 4364 else 4365 return false; 4366} 4367inline bool Type::isMemberDataPointerType() const { 4368 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4369 return T->isMemberDataPointer(); 4370 else 4371 return false; 4372} 4373inline bool Type::isArrayType() const { 4374 return isa<ArrayType>(CanonicalType); 4375} 4376inline bool Type::isConstantArrayType() const { 4377 return isa<ConstantArrayType>(CanonicalType); 4378} 4379inline bool Type::isIncompleteArrayType() const { 4380 return isa<IncompleteArrayType>(CanonicalType); 4381} 4382inline bool Type::isVariableArrayType() const { 4383 return isa<VariableArrayType>(CanonicalType); 4384} 4385inline bool Type::isDependentSizedArrayType() const { 4386 return isa<DependentSizedArrayType>(CanonicalType); 4387} 4388inline bool Type::isBuiltinType() const { 4389 return isa<BuiltinType>(CanonicalType); 4390} 4391inline bool Type::isRecordType() const { 4392 return isa<RecordType>(CanonicalType); 4393} 4394inline bool Type::isEnumeralType() const { 4395 return isa<EnumType>(CanonicalType); 4396} 4397inline bool Type::isAnyComplexType() const { 4398 return isa<ComplexType>(CanonicalType); 4399} 4400inline bool Type::isVectorType() const { 4401 return isa<VectorType>(CanonicalType); 4402} 4403inline bool Type::isExtVectorType() const { 4404 return isa<ExtVectorType>(CanonicalType); 4405} 4406inline bool Type::isObjCObjectPointerType() const { 4407 return isa<ObjCObjectPointerType>(CanonicalType); 4408} 4409inline bool Type::isObjCObjectType() const { 4410 return isa<ObjCObjectType>(CanonicalType); 4411} 4412inline bool Type::isObjCObjectOrInterfaceType() const { 4413 return isa<ObjCInterfaceType>(CanonicalType) || 4414 isa<ObjCObjectType>(CanonicalType); 4415} 4416 4417inline bool Type::isObjCQualifiedIdType() const { 4418 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4419 return OPT->isObjCQualifiedIdType(); 4420 return false; 4421} 4422inline bool Type::isObjCQualifiedClassType() const { 4423 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4424 return OPT->isObjCQualifiedClassType(); 4425 return false; 4426} 4427inline bool Type::isObjCIdType() const { 4428 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4429 return OPT->isObjCIdType(); 4430 return false; 4431} 4432inline bool Type::isObjCClassType() const { 4433 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4434 return OPT->isObjCClassType(); 4435 return false; 4436} 4437inline bool Type::isObjCSelType() const { 4438 if (const PointerType *OPT = getAs<PointerType>()) 4439 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4440 return false; 4441} 4442inline bool Type::isObjCBuiltinType() const { 4443 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4444} 4445inline bool Type::isTemplateTypeParmType() const { 4446 return isa<TemplateTypeParmType>(CanonicalType); 4447} 4448 4449inline bool Type::isSpecificBuiltinType(unsigned K) const { 4450 if (const BuiltinType *BT = getAs<BuiltinType>()) 4451 if (BT->getKind() == (BuiltinType::Kind) K) 4452 return true; 4453 return false; 4454} 4455 4456inline bool Type::isPlaceholderType() const { 4457 if (const BuiltinType *BT = getAs<BuiltinType>()) 4458 return BT->isPlaceholderType(); 4459 return false; 4460} 4461 4462inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4463 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4464 return (BT->getKind() == (BuiltinType::Kind) K); 4465 return false; 4466} 4467 4468/// \brief Determines whether this is a type for which one can define 4469/// an overloaded operator. 4470inline bool Type::isOverloadableType() const { 4471 return isDependentType() || isRecordType() || isEnumeralType(); 4472} 4473 4474inline bool Type::hasPointerRepresentation() const { 4475 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4476 isObjCObjectPointerType() || isNullPtrType()); 4477} 4478 4479inline bool Type::hasObjCPointerRepresentation() const { 4480 return isObjCObjectPointerType(); 4481} 4482 4483inline const Type *Type::getBaseElementTypeUnsafe() const { 4484 const Type *type = this; 4485 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4486 type = arrayType->getElementType().getTypePtr(); 4487 return type; 4488} 4489 4490/// Insertion operator for diagnostics. This allows sending QualType's into a 4491/// diagnostic with <<. 4492inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4493 QualType T) { 4494 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4495 Diagnostic::ak_qualtype); 4496 return DB; 4497} 4498 4499/// Insertion operator for partial diagnostics. This allows sending QualType's 4500/// into a diagnostic with <<. 4501inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4502 QualType T) { 4503 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4504 Diagnostic::ak_qualtype); 4505 return PD; 4506} 4507 4508// Helper class template that is used by Type::getAs to ensure that one does 4509// not try to look through a qualified type to get to an array type. 4510template<typename T, 4511 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4512 llvm::is_base_of<ArrayType, T>::value)> 4513struct ArrayType_cannot_be_used_with_getAs { }; 4514 4515template<typename T> 4516struct ArrayType_cannot_be_used_with_getAs<T, true>; 4517 4518/// Member-template getAs<specific type>'. 4519template <typename T> const T *Type::getAs() const { 4520 ArrayType_cannot_be_used_with_getAs<T> at; 4521 (void)at; 4522 4523 // If this is directly a T type, return it. 4524 if (const T *Ty = dyn_cast<T>(this)) 4525 return Ty; 4526 4527 // If the canonical form of this type isn't the right kind, reject it. 4528 if (!isa<T>(CanonicalType)) 4529 return 0; 4530 4531 // If this is a typedef for the type, strip the typedef off without 4532 // losing all typedef information. 4533 return cast<T>(getUnqualifiedDesugaredType()); 4534} 4535 4536inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4537 // If this is directly an array type, return it. 4538 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4539 return arr; 4540 4541 // If the canonical form of this type isn't the right kind, reject it. 4542 if (!isa<ArrayType>(CanonicalType)) 4543 return 0; 4544 4545 // If this is a typedef for the type, strip the typedef off without 4546 // losing all typedef information. 4547 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4548} 4549 4550template <typename T> const T *Type::castAs() const { 4551 ArrayType_cannot_be_used_with_getAs<T> at; 4552 (void) at; 4553 4554 assert(isa<T>(CanonicalType)); 4555 if (const T *ty = dyn_cast<T>(this)) return ty; 4556 return cast<T>(getUnqualifiedDesugaredType()); 4557} 4558 4559inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4560 assert(isa<ArrayType>(CanonicalType)); 4561 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4562 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4563} 4564 4565} // end namespace clang 4566 4567#endif 4568