Type.h revision feb375d31b7e9108b04a9f55b721d5e0c793a558
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 /// isConstantSizeType - Return true if this is not a variable sized type, 1440 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1441 /// incomplete types. 1442 bool isConstantSizeType() const; 1443 1444 /// isSpecifierType - Returns true if this type can be represented by some 1445 /// set of type specifiers. 1446 bool isSpecifierType() const; 1447 1448 /// \brief Determine the linkage of this type. 1449 Linkage getLinkage() const; 1450 1451 /// \brief Determine the visibility of this type. 1452 Visibility getVisibility() const; 1453 1454 /// \brief Determine the linkage and visibility of this type. 1455 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1456 1457 /// \brief Note that the linkage is no longer known. 1458 void ClearLinkageCache(); 1459 1460 const char *getTypeClassName() const; 1461 1462 QualType getCanonicalTypeInternal() const { 1463 return CanonicalType; 1464 } 1465 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1466 void dump() const; 1467 static bool classof(const Type *) { return true; } 1468 1469 friend class ASTReader; 1470 friend class ASTWriter; 1471}; 1472 1473template <> inline const TypedefType *Type::getAs() const { 1474 return dyn_cast<TypedefType>(this); 1475} 1476 1477// We can do canonical leaf types faster, because we don't have to 1478// worry about preserving child type decoration. 1479#define TYPE(Class, Base) 1480#define LEAF_TYPE(Class) \ 1481template <> inline const Class##Type *Type::getAs() const { \ 1482 return dyn_cast<Class##Type>(CanonicalType); \ 1483} \ 1484template <> inline const Class##Type *Type::castAs() const { \ 1485 return cast<Class##Type>(CanonicalType); \ 1486} 1487#include "clang/AST/TypeNodes.def" 1488 1489 1490/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1491/// types are always canonical and have a literal name field. 1492class BuiltinType : public Type { 1493public: 1494 enum Kind { 1495 Void, 1496 1497 Bool, // This is bool and/or _Bool. 1498 Char_U, // This is 'char' for targets where char is unsigned. 1499 UChar, // This is explicitly qualified unsigned char. 1500 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1501 Char16, // This is 'char16_t' for C++. 1502 Char32, // This is 'char32_t' for C++. 1503 UShort, 1504 UInt, 1505 ULong, 1506 ULongLong, 1507 UInt128, // __uint128_t 1508 1509 Char_S, // This is 'char' for targets where char is signed. 1510 SChar, // This is explicitly qualified signed char. 1511 WChar_S, // This is 'wchar_t' for C++, when signed. 1512 Short, 1513 Int, 1514 Long, 1515 LongLong, 1516 Int128, // __int128_t 1517 1518 Float, Double, LongDouble, 1519 1520 NullPtr, // This is the type of C++0x 'nullptr'. 1521 1522 /// The primitive Objective C 'id' type. The user-visible 'id' 1523 /// type is a typedef of an ObjCObjectPointerType to an 1524 /// ObjCObjectType with this as its base. In fact, this only ever 1525 /// shows up in an AST as the base type of an ObjCObjectType. 1526 ObjCId, 1527 1528 /// The primitive Objective C 'Class' type. The user-visible 1529 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1530 /// ObjCObjectType with this as its base. In fact, this only ever 1531 /// shows up in an AST as the base type of an ObjCObjectType. 1532 ObjCClass, 1533 1534 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1535 /// type is a typedef of a PointerType to this. 1536 ObjCSel, 1537 1538 /// This represents the type of an expression whose type is 1539 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1540 /// appear in situations where the structure of the type is 1541 /// theoretically deducible. 1542 Dependent, 1543 1544 /// The type of an unresolved overload set. A placeholder type. 1545 /// Expressions with this type have one of the following basic 1546 /// forms, with parentheses generally permitted: 1547 /// foo # possibly qualified, not if an implicit access 1548 /// foo # possibly qualified, not if an implicit access 1549 /// &foo # possibly qualified, not if an implicit access 1550 /// x->foo # only if might be a static member function 1551 /// &x->foo # only if might be a static member function 1552 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1553 /// OverloadExpr::find can be used to analyze the expression. 1554 Overload, 1555 1556 /// The type of a bound C++ non-static member function. 1557 /// A placeholder type. Expressions with this type have one of the 1558 /// following basic forms: 1559 /// foo # if an implicit access 1560 /// x->foo # if only contains non-static members 1561 BoundMember, 1562 1563 /// __builtin_any_type. A placeholder type. Useful for clients 1564 /// like debuggers that don't know what type to give something. 1565 /// Only a small number of operations are valid on expressions of 1566 /// unknown type, most notably explicit casts. 1567 UnknownAny 1568 }; 1569 1570public: 1571 BuiltinType(Kind K) 1572 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1573 /*VariablyModified=*/false, 1574 /*Unexpanded paramter pack=*/false) { 1575 BuiltinTypeBits.Kind = K; 1576 } 1577 1578 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1579 const char *getName(const LangOptions &LO) const; 1580 1581 bool isSugared() const { return false; } 1582 QualType desugar() const { return QualType(this, 0); } 1583 1584 bool isInteger() const { 1585 return getKind() >= Bool && getKind() <= Int128; 1586 } 1587 1588 bool isSignedInteger() const { 1589 return getKind() >= Char_S && getKind() <= Int128; 1590 } 1591 1592 bool isUnsignedInteger() const { 1593 return getKind() >= Bool && getKind() <= UInt128; 1594 } 1595 1596 bool isFloatingPoint() const { 1597 return getKind() >= Float && getKind() <= LongDouble; 1598 } 1599 1600 /// Determines whether this type is a placeholder type, i.e. a type 1601 /// which cannot appear in arbitrary positions in a fully-formed 1602 /// expression. 1603 bool isPlaceholderType() const { 1604 return getKind() >= Overload; 1605 } 1606 1607 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1608 static bool classof(const BuiltinType *) { return true; } 1609}; 1610 1611/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1612/// types (_Complex float etc) as well as the GCC integer complex extensions. 1613/// 1614class ComplexType : public Type, public llvm::FoldingSetNode { 1615 QualType ElementType; 1616 ComplexType(QualType Element, QualType CanonicalPtr) : 1617 Type(Complex, CanonicalPtr, Element->isDependentType(), 1618 Element->isVariablyModifiedType(), 1619 Element->containsUnexpandedParameterPack()), 1620 ElementType(Element) { 1621 } 1622 friend class ASTContext; // ASTContext creates these. 1623 1624public: 1625 QualType getElementType() const { return ElementType; } 1626 1627 bool isSugared() const { return false; } 1628 QualType desugar() const { return QualType(this, 0); } 1629 1630 void Profile(llvm::FoldingSetNodeID &ID) { 1631 Profile(ID, getElementType()); 1632 } 1633 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1634 ID.AddPointer(Element.getAsOpaquePtr()); 1635 } 1636 1637 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1638 static bool classof(const ComplexType *) { return true; } 1639}; 1640 1641/// ParenType - Sugar for parentheses used when specifying types. 1642/// 1643class ParenType : public Type, public llvm::FoldingSetNode { 1644 QualType Inner; 1645 1646 ParenType(QualType InnerType, QualType CanonType) : 1647 Type(Paren, CanonType, InnerType->isDependentType(), 1648 InnerType->isVariablyModifiedType(), 1649 InnerType->containsUnexpandedParameterPack()), 1650 Inner(InnerType) { 1651 } 1652 friend class ASTContext; // ASTContext creates these. 1653 1654public: 1655 1656 QualType getInnerType() const { return Inner; } 1657 1658 bool isSugared() const { return true; } 1659 QualType desugar() const { return getInnerType(); } 1660 1661 void Profile(llvm::FoldingSetNodeID &ID) { 1662 Profile(ID, getInnerType()); 1663 } 1664 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1665 Inner.Profile(ID); 1666 } 1667 1668 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1669 static bool classof(const ParenType *) { return true; } 1670}; 1671 1672/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1673/// 1674class PointerType : public Type, public llvm::FoldingSetNode { 1675 QualType PointeeType; 1676 1677 PointerType(QualType Pointee, QualType CanonicalPtr) : 1678 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1679 Pointee->isVariablyModifiedType(), 1680 Pointee->containsUnexpandedParameterPack()), 1681 PointeeType(Pointee) { 1682 } 1683 friend class ASTContext; // ASTContext creates these. 1684 1685public: 1686 1687 QualType getPointeeType() const { return PointeeType; } 1688 1689 bool isSugared() const { return false; } 1690 QualType desugar() const { return QualType(this, 0); } 1691 1692 void Profile(llvm::FoldingSetNodeID &ID) { 1693 Profile(ID, getPointeeType()); 1694 } 1695 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1696 ID.AddPointer(Pointee.getAsOpaquePtr()); 1697 } 1698 1699 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1700 static bool classof(const PointerType *) { return true; } 1701}; 1702 1703/// BlockPointerType - pointer to a block type. 1704/// This type is to represent types syntactically represented as 1705/// "void (^)(int)", etc. Pointee is required to always be a function type. 1706/// 1707class BlockPointerType : public Type, public llvm::FoldingSetNode { 1708 QualType PointeeType; // Block is some kind of pointer type 1709 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1710 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1711 Pointee->isVariablyModifiedType(), 1712 Pointee->containsUnexpandedParameterPack()), 1713 PointeeType(Pointee) { 1714 } 1715 friend class ASTContext; // ASTContext creates these. 1716 1717public: 1718 1719 // Get the pointee type. Pointee is required to always be a function type. 1720 QualType getPointeeType() const { return PointeeType; } 1721 1722 bool isSugared() const { return false; } 1723 QualType desugar() const { return QualType(this, 0); } 1724 1725 void Profile(llvm::FoldingSetNodeID &ID) { 1726 Profile(ID, getPointeeType()); 1727 } 1728 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1729 ID.AddPointer(Pointee.getAsOpaquePtr()); 1730 } 1731 1732 static bool classof(const Type *T) { 1733 return T->getTypeClass() == BlockPointer; 1734 } 1735 static bool classof(const BlockPointerType *) { return true; } 1736}; 1737 1738/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1739/// 1740class ReferenceType : public Type, public llvm::FoldingSetNode { 1741 QualType PointeeType; 1742 1743protected: 1744 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1745 bool SpelledAsLValue) : 1746 Type(tc, CanonicalRef, Referencee->isDependentType(), 1747 Referencee->isVariablyModifiedType(), 1748 Referencee->containsUnexpandedParameterPack()), 1749 PointeeType(Referencee) 1750 { 1751 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1752 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1753 } 1754 1755public: 1756 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1757 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1758 1759 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1760 QualType getPointeeType() const { 1761 // FIXME: this might strip inner qualifiers; okay? 1762 const ReferenceType *T = this; 1763 while (T->isInnerRef()) 1764 T = T->PointeeType->castAs<ReferenceType>(); 1765 return T->PointeeType; 1766 } 1767 1768 void Profile(llvm::FoldingSetNodeID &ID) { 1769 Profile(ID, PointeeType, isSpelledAsLValue()); 1770 } 1771 static void Profile(llvm::FoldingSetNodeID &ID, 1772 QualType Referencee, 1773 bool SpelledAsLValue) { 1774 ID.AddPointer(Referencee.getAsOpaquePtr()); 1775 ID.AddBoolean(SpelledAsLValue); 1776 } 1777 1778 static bool classof(const Type *T) { 1779 return T->getTypeClass() == LValueReference || 1780 T->getTypeClass() == RValueReference; 1781 } 1782 static bool classof(const ReferenceType *) { return true; } 1783}; 1784 1785/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1786/// 1787class LValueReferenceType : public ReferenceType { 1788 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1789 bool SpelledAsLValue) : 1790 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1791 {} 1792 friend class ASTContext; // ASTContext creates these 1793public: 1794 bool isSugared() const { return false; } 1795 QualType desugar() const { return QualType(this, 0); } 1796 1797 static bool classof(const Type *T) { 1798 return T->getTypeClass() == LValueReference; 1799 } 1800 static bool classof(const LValueReferenceType *) { return true; } 1801}; 1802 1803/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1804/// 1805class RValueReferenceType : public ReferenceType { 1806 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1807 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1808 } 1809 friend class ASTContext; // ASTContext creates these 1810public: 1811 bool isSugared() const { return false; } 1812 QualType desugar() const { return QualType(this, 0); } 1813 1814 static bool classof(const Type *T) { 1815 return T->getTypeClass() == RValueReference; 1816 } 1817 static bool classof(const RValueReferenceType *) { return true; } 1818}; 1819 1820/// MemberPointerType - C++ 8.3.3 - Pointers to members 1821/// 1822class MemberPointerType : public Type, public llvm::FoldingSetNode { 1823 QualType PointeeType; 1824 /// The class of which the pointee is a member. Must ultimately be a 1825 /// RecordType, but could be a typedef or a template parameter too. 1826 const Type *Class; 1827 1828 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1829 Type(MemberPointer, CanonicalPtr, 1830 Cls->isDependentType() || Pointee->isDependentType(), 1831 Pointee->isVariablyModifiedType(), 1832 (Cls->containsUnexpandedParameterPack() || 1833 Pointee->containsUnexpandedParameterPack())), 1834 PointeeType(Pointee), Class(Cls) { 1835 } 1836 friend class ASTContext; // ASTContext creates these. 1837 1838public: 1839 QualType getPointeeType() const { return PointeeType; } 1840 1841 /// Returns true if the member type (i.e. the pointee type) is a 1842 /// function type rather than a data-member type. 1843 bool isMemberFunctionPointer() const { 1844 return PointeeType->isFunctionProtoType(); 1845 } 1846 1847 /// Returns true if the member type (i.e. the pointee type) is a 1848 /// data type rather than a function type. 1849 bool isMemberDataPointer() const { 1850 return !PointeeType->isFunctionProtoType(); 1851 } 1852 1853 const Type *getClass() const { return Class; } 1854 1855 bool isSugared() const { return false; } 1856 QualType desugar() const { return QualType(this, 0); } 1857 1858 void Profile(llvm::FoldingSetNodeID &ID) { 1859 Profile(ID, getPointeeType(), getClass()); 1860 } 1861 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1862 const Type *Class) { 1863 ID.AddPointer(Pointee.getAsOpaquePtr()); 1864 ID.AddPointer(Class); 1865 } 1866 1867 static bool classof(const Type *T) { 1868 return T->getTypeClass() == MemberPointer; 1869 } 1870 static bool classof(const MemberPointerType *) { return true; } 1871}; 1872 1873/// ArrayType - C99 6.7.5.2 - Array Declarators. 1874/// 1875class ArrayType : public Type, public llvm::FoldingSetNode { 1876public: 1877 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1878 /// an array with a static size (e.g. int X[static 4]), or an array 1879 /// with a star size (e.g. int X[*]). 1880 /// 'static' is only allowed on function parameters. 1881 enum ArraySizeModifier { 1882 Normal, Static, Star 1883 }; 1884private: 1885 /// ElementType - The element type of the array. 1886 QualType ElementType; 1887 1888protected: 1889 // C++ [temp.dep.type]p1: 1890 // A type is dependent if it is... 1891 // - an array type constructed from any dependent type or whose 1892 // size is specified by a constant expression that is 1893 // value-dependent, 1894 ArrayType(TypeClass tc, QualType et, QualType can, 1895 ArraySizeModifier sm, unsigned tq, 1896 bool ContainsUnexpandedParameterPack) 1897 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1898 (tc == VariableArray || et->isVariablyModifiedType()), 1899 ContainsUnexpandedParameterPack), 1900 ElementType(et) { 1901 ArrayTypeBits.IndexTypeQuals = tq; 1902 ArrayTypeBits.SizeModifier = sm; 1903 } 1904 1905 friend class ASTContext; // ASTContext creates these. 1906 1907public: 1908 QualType getElementType() const { return ElementType; } 1909 ArraySizeModifier getSizeModifier() const { 1910 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1911 } 1912 Qualifiers getIndexTypeQualifiers() const { 1913 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1914 } 1915 unsigned getIndexTypeCVRQualifiers() const { 1916 return ArrayTypeBits.IndexTypeQuals; 1917 } 1918 1919 static bool classof(const Type *T) { 1920 return T->getTypeClass() == ConstantArray || 1921 T->getTypeClass() == VariableArray || 1922 T->getTypeClass() == IncompleteArray || 1923 T->getTypeClass() == DependentSizedArray; 1924 } 1925 static bool classof(const ArrayType *) { return true; } 1926}; 1927 1928/// ConstantArrayType - This class represents the canonical version of 1929/// C arrays with a specified constant size. For example, the canonical 1930/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1931/// type is 'int' and the size is 404. 1932class ConstantArrayType : public ArrayType { 1933 llvm::APInt Size; // Allows us to unique the type. 1934 1935 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1936 ArraySizeModifier sm, unsigned tq) 1937 : ArrayType(ConstantArray, et, can, sm, tq, 1938 et->containsUnexpandedParameterPack()), 1939 Size(size) {} 1940protected: 1941 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1942 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1943 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1944 Size(size) {} 1945 friend class ASTContext; // ASTContext creates these. 1946public: 1947 const llvm::APInt &getSize() const { return Size; } 1948 bool isSugared() const { return false; } 1949 QualType desugar() const { return QualType(this, 0); } 1950 1951 1952 /// \brief Determine the number of bits required to address a member of 1953 // an array with the given element type and number of elements. 1954 static unsigned getNumAddressingBits(ASTContext &Context, 1955 QualType ElementType, 1956 const llvm::APInt &NumElements); 1957 1958 /// \brief Determine the maximum number of active bits that an array's size 1959 /// can require, which limits the maximum size of the array. 1960 static unsigned getMaxSizeBits(ASTContext &Context); 1961 1962 void Profile(llvm::FoldingSetNodeID &ID) { 1963 Profile(ID, getElementType(), getSize(), 1964 getSizeModifier(), getIndexTypeCVRQualifiers()); 1965 } 1966 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1967 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1968 unsigned TypeQuals) { 1969 ID.AddPointer(ET.getAsOpaquePtr()); 1970 ID.AddInteger(ArraySize.getZExtValue()); 1971 ID.AddInteger(SizeMod); 1972 ID.AddInteger(TypeQuals); 1973 } 1974 static bool classof(const Type *T) { 1975 return T->getTypeClass() == ConstantArray; 1976 } 1977 static bool classof(const ConstantArrayType *) { return true; } 1978}; 1979 1980/// IncompleteArrayType - This class represents C arrays with an unspecified 1981/// size. For example 'int A[]' has an IncompleteArrayType where the element 1982/// type is 'int' and the size is unspecified. 1983class IncompleteArrayType : public ArrayType { 1984 1985 IncompleteArrayType(QualType et, QualType can, 1986 ArraySizeModifier sm, unsigned tq) 1987 : ArrayType(IncompleteArray, et, can, sm, tq, 1988 et->containsUnexpandedParameterPack()) {} 1989 friend class ASTContext; // ASTContext creates these. 1990public: 1991 bool isSugared() const { return false; } 1992 QualType desugar() const { return QualType(this, 0); } 1993 1994 static bool classof(const Type *T) { 1995 return T->getTypeClass() == IncompleteArray; 1996 } 1997 static bool classof(const IncompleteArrayType *) { return true; } 1998 1999 friend class StmtIteratorBase; 2000 2001 void Profile(llvm::FoldingSetNodeID &ID) { 2002 Profile(ID, getElementType(), getSizeModifier(), 2003 getIndexTypeCVRQualifiers()); 2004 } 2005 2006 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2007 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2008 ID.AddPointer(ET.getAsOpaquePtr()); 2009 ID.AddInteger(SizeMod); 2010 ID.AddInteger(TypeQuals); 2011 } 2012}; 2013 2014/// VariableArrayType - This class represents C arrays with a specified size 2015/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2016/// Since the size expression is an arbitrary expression, we store it as such. 2017/// 2018/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2019/// should not be: two lexically equivalent variable array types could mean 2020/// different things, for example, these variables do not have the same type 2021/// dynamically: 2022/// 2023/// void foo(int x) { 2024/// int Y[x]; 2025/// ++x; 2026/// int Z[x]; 2027/// } 2028/// 2029class VariableArrayType : public ArrayType { 2030 /// SizeExpr - An assignment expression. VLA's are only permitted within 2031 /// a function block. 2032 Stmt *SizeExpr; 2033 /// Brackets - The left and right array brackets. 2034 SourceRange Brackets; 2035 2036 VariableArrayType(QualType et, QualType can, Expr *e, 2037 ArraySizeModifier sm, unsigned tq, 2038 SourceRange brackets) 2039 : ArrayType(VariableArray, et, can, sm, tq, 2040 et->containsUnexpandedParameterPack()), 2041 SizeExpr((Stmt*) e), Brackets(brackets) {} 2042 friend class ASTContext; // ASTContext creates these. 2043 2044public: 2045 Expr *getSizeExpr() const { 2046 // We use C-style casts instead of cast<> here because we do not wish 2047 // to have a dependency of Type.h on Stmt.h/Expr.h. 2048 return (Expr*) SizeExpr; 2049 } 2050 SourceRange getBracketsRange() const { return Brackets; } 2051 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2052 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2053 2054 bool isSugared() const { return false; } 2055 QualType desugar() const { return QualType(this, 0); } 2056 2057 static bool classof(const Type *T) { 2058 return T->getTypeClass() == VariableArray; 2059 } 2060 static bool classof(const VariableArrayType *) { return true; } 2061 2062 friend class StmtIteratorBase; 2063 2064 void Profile(llvm::FoldingSetNodeID &ID) { 2065 assert(0 && "Cannot unique VariableArrayTypes."); 2066 } 2067}; 2068 2069/// DependentSizedArrayType - This type represents an array type in 2070/// C++ whose size is a value-dependent expression. For example: 2071/// 2072/// \code 2073/// template<typename T, int Size> 2074/// class array { 2075/// T data[Size]; 2076/// }; 2077/// \endcode 2078/// 2079/// For these types, we won't actually know what the array bound is 2080/// until template instantiation occurs, at which point this will 2081/// become either a ConstantArrayType or a VariableArrayType. 2082class DependentSizedArrayType : public ArrayType { 2083 const ASTContext &Context; 2084 2085 /// \brief An assignment expression that will instantiate to the 2086 /// size of the array. 2087 /// 2088 /// The expression itself might be NULL, in which case the array 2089 /// type will have its size deduced from an initializer. 2090 Stmt *SizeExpr; 2091 2092 /// Brackets - The left and right array brackets. 2093 SourceRange Brackets; 2094 2095 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2096 Expr *e, ArraySizeModifier sm, unsigned tq, 2097 SourceRange brackets); 2098 2099 friend class ASTContext; // ASTContext creates these. 2100 2101public: 2102 Expr *getSizeExpr() const { 2103 // We use C-style casts instead of cast<> here because we do not wish 2104 // to have a dependency of Type.h on Stmt.h/Expr.h. 2105 return (Expr*) SizeExpr; 2106 } 2107 SourceRange getBracketsRange() const { return Brackets; } 2108 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2109 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2110 2111 bool isSugared() const { return false; } 2112 QualType desugar() const { return QualType(this, 0); } 2113 2114 static bool classof(const Type *T) { 2115 return T->getTypeClass() == DependentSizedArray; 2116 } 2117 static bool classof(const DependentSizedArrayType *) { return true; } 2118 2119 friend class StmtIteratorBase; 2120 2121 2122 void Profile(llvm::FoldingSetNodeID &ID) { 2123 Profile(ID, Context, getElementType(), 2124 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2125 } 2126 2127 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2128 QualType ET, ArraySizeModifier SizeMod, 2129 unsigned TypeQuals, Expr *E); 2130}; 2131 2132/// DependentSizedExtVectorType - This type represent an extended vector type 2133/// where either the type or size is dependent. For example: 2134/// @code 2135/// template<typename T, int Size> 2136/// class vector { 2137/// typedef T __attribute__((ext_vector_type(Size))) type; 2138/// } 2139/// @endcode 2140class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2141 const ASTContext &Context; 2142 Expr *SizeExpr; 2143 /// ElementType - The element type of the array. 2144 QualType ElementType; 2145 SourceLocation loc; 2146 2147 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2148 QualType can, Expr *SizeExpr, SourceLocation loc); 2149 2150 friend class ASTContext; 2151 2152public: 2153 Expr *getSizeExpr() const { return SizeExpr; } 2154 QualType getElementType() const { return ElementType; } 2155 SourceLocation getAttributeLoc() const { return loc; } 2156 2157 bool isSugared() const { return false; } 2158 QualType desugar() const { return QualType(this, 0); } 2159 2160 static bool classof(const Type *T) { 2161 return T->getTypeClass() == DependentSizedExtVector; 2162 } 2163 static bool classof(const DependentSizedExtVectorType *) { return true; } 2164 2165 void Profile(llvm::FoldingSetNodeID &ID) { 2166 Profile(ID, Context, getElementType(), getSizeExpr()); 2167 } 2168 2169 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2170 QualType ElementType, Expr *SizeExpr); 2171}; 2172 2173 2174/// VectorType - GCC generic vector type. This type is created using 2175/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2176/// bytes; or from an Altivec __vector or vector declaration. 2177/// Since the constructor takes the number of vector elements, the 2178/// client is responsible for converting the size into the number of elements. 2179class VectorType : public Type, public llvm::FoldingSetNode { 2180public: 2181 enum VectorKind { 2182 GenericVector, // not a target-specific vector type 2183 AltiVecVector, // is AltiVec vector 2184 AltiVecPixel, // is AltiVec 'vector Pixel' 2185 AltiVecBool, // is AltiVec 'vector bool ...' 2186 NeonVector, // is ARM Neon vector 2187 NeonPolyVector // is ARM Neon polynomial vector 2188 }; 2189protected: 2190 /// ElementType - The element type of the vector. 2191 QualType ElementType; 2192 2193 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2194 VectorKind vecKind); 2195 2196 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2197 QualType canonType, VectorKind vecKind); 2198 2199 friend class ASTContext; // ASTContext creates these. 2200 2201public: 2202 2203 QualType getElementType() const { return ElementType; } 2204 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2205 2206 bool isSugared() const { return false; } 2207 QualType desugar() const { return QualType(this, 0); } 2208 2209 VectorKind getVectorKind() const { 2210 return VectorKind(VectorTypeBits.VecKind); 2211 } 2212 2213 void Profile(llvm::FoldingSetNodeID &ID) { 2214 Profile(ID, getElementType(), getNumElements(), 2215 getTypeClass(), getVectorKind()); 2216 } 2217 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2218 unsigned NumElements, TypeClass TypeClass, 2219 VectorKind VecKind) { 2220 ID.AddPointer(ElementType.getAsOpaquePtr()); 2221 ID.AddInteger(NumElements); 2222 ID.AddInteger(TypeClass); 2223 ID.AddInteger(VecKind); 2224 } 2225 2226 static bool classof(const Type *T) { 2227 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2228 } 2229 static bool classof(const VectorType *) { return true; } 2230}; 2231 2232/// ExtVectorType - Extended vector type. This type is created using 2233/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2234/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2235/// class enables syntactic extensions, like Vector Components for accessing 2236/// points, colors, and textures (modeled after OpenGL Shading Language). 2237class ExtVectorType : public VectorType { 2238 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2239 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2240 friend class ASTContext; // ASTContext creates these. 2241public: 2242 static int getPointAccessorIdx(char c) { 2243 switch (c) { 2244 default: return -1; 2245 case 'x': return 0; 2246 case 'y': return 1; 2247 case 'z': return 2; 2248 case 'w': return 3; 2249 } 2250 } 2251 static int getNumericAccessorIdx(char c) { 2252 switch (c) { 2253 default: return -1; 2254 case '0': return 0; 2255 case '1': return 1; 2256 case '2': return 2; 2257 case '3': return 3; 2258 case '4': return 4; 2259 case '5': return 5; 2260 case '6': return 6; 2261 case '7': return 7; 2262 case '8': return 8; 2263 case '9': return 9; 2264 case 'A': 2265 case 'a': return 10; 2266 case 'B': 2267 case 'b': return 11; 2268 case 'C': 2269 case 'c': return 12; 2270 case 'D': 2271 case 'd': return 13; 2272 case 'E': 2273 case 'e': return 14; 2274 case 'F': 2275 case 'f': return 15; 2276 } 2277 } 2278 2279 static int getAccessorIdx(char c) { 2280 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2281 return getNumericAccessorIdx(c); 2282 } 2283 2284 bool isAccessorWithinNumElements(char c) const { 2285 if (int idx = getAccessorIdx(c)+1) 2286 return unsigned(idx-1) < getNumElements(); 2287 return false; 2288 } 2289 bool isSugared() const { return false; } 2290 QualType desugar() const { return QualType(this, 0); } 2291 2292 static bool classof(const Type *T) { 2293 return T->getTypeClass() == ExtVector; 2294 } 2295 static bool classof(const ExtVectorType *) { return true; } 2296}; 2297 2298/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2299/// class of FunctionNoProtoType and FunctionProtoType. 2300/// 2301class FunctionType : public Type { 2302 // The type returned by the function. 2303 QualType ResultType; 2304 2305 public: 2306 /// ExtInfo - A class which abstracts out some details necessary for 2307 /// making a call. 2308 /// 2309 /// It is not actually used directly for storing this information in 2310 /// a FunctionType, although FunctionType does currently use the 2311 /// same bit-pattern. 2312 /// 2313 // If you add a field (say Foo), other than the obvious places (both, 2314 // constructors, compile failures), what you need to update is 2315 // * Operator== 2316 // * getFoo 2317 // * withFoo 2318 // * functionType. Add Foo, getFoo. 2319 // * ASTContext::getFooType 2320 // * ASTContext::mergeFunctionTypes 2321 // * FunctionNoProtoType::Profile 2322 // * FunctionProtoType::Profile 2323 // * TypePrinter::PrintFunctionProto 2324 // * AST read and write 2325 // * Codegen 2326 class ExtInfo { 2327 // Feel free to rearrange or add bits, but if you go over 8, 2328 // you'll need to adjust both the Bits field below and 2329 // Type::FunctionTypeBitfields. 2330 2331 // | CC |noreturn|hasregparm|regparm 2332 // |0 .. 2| 3 | 4 |5 .. 7 2333 enum { CallConvMask = 0x7 }; 2334 enum { NoReturnMask = 0x8 }; 2335 enum { HasRegParmMask = 0x10 }; 2336 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2337 RegParmOffset = 5 }; 2338 2339 unsigned char Bits; 2340 2341 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2342 2343 friend class FunctionType; 2344 2345 public: 2346 // Constructor with no defaults. Use this when you know that you 2347 // have all the elements (when reading an AST file for example). 2348 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc) { 2349 Bits = ((unsigned) cc) | 2350 (noReturn ? NoReturnMask : 0) | 2351 (hasRegParm ? HasRegParmMask : 0) | 2352 (regParm << RegParmOffset); 2353 } 2354 2355 // Constructor with all defaults. Use when for example creating a 2356 // function know to use defaults. 2357 ExtInfo() : Bits(0) {} 2358 2359 bool getNoReturn() const { return Bits & NoReturnMask; } 2360 bool getHasRegParm() const { return Bits & HasRegParmMask; } 2361 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2362 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2363 2364 bool operator==(ExtInfo Other) const { 2365 return Bits == Other.Bits; 2366 } 2367 bool operator!=(ExtInfo Other) const { 2368 return Bits != Other.Bits; 2369 } 2370 2371 // Note that we don't have setters. That is by design, use 2372 // the following with methods instead of mutating these objects. 2373 2374 ExtInfo withNoReturn(bool noReturn) const { 2375 if (noReturn) 2376 return ExtInfo(Bits | NoReturnMask); 2377 else 2378 return ExtInfo(Bits & ~NoReturnMask); 2379 } 2380 2381 ExtInfo withRegParm(unsigned RegParm) const { 2382 return ExtInfo(HasRegParmMask | (Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2383 } 2384 2385 ExtInfo withCallingConv(CallingConv cc) const { 2386 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2387 } 2388 2389 void Profile(llvm::FoldingSetNodeID &ID) const { 2390 ID.AddInteger(Bits); 2391 } 2392 }; 2393 2394protected: 2395 FunctionType(TypeClass tc, QualType res, bool variadic, 2396 unsigned typeQuals, RefQualifierKind RefQualifier, 2397 QualType Canonical, bool Dependent, 2398 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2399 ExtInfo Info) 2400 : Type(tc, Canonical, Dependent, VariablyModified, 2401 ContainsUnexpandedParameterPack), 2402 ResultType(res) { 2403 FunctionTypeBits.ExtInfo = Info.Bits; 2404 FunctionTypeBits.Variadic = variadic; 2405 FunctionTypeBits.TypeQuals = typeQuals; 2406 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2407 } 2408 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2409 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2410 2411 RefQualifierKind getRefQualifier() const { 2412 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2413 } 2414 2415public: 2416 2417 QualType getResultType() const { return ResultType; } 2418 2419 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2420 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2421 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2422 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2423 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2424 2425 /// \brief Determine the type of an expression that calls a function of 2426 /// this type. 2427 QualType getCallResultType(ASTContext &Context) const { 2428 return getResultType().getNonLValueExprType(Context); 2429 } 2430 2431 static llvm::StringRef getNameForCallConv(CallingConv CC); 2432 2433 static bool classof(const Type *T) { 2434 return T->getTypeClass() == FunctionNoProto || 2435 T->getTypeClass() == FunctionProto; 2436 } 2437 static bool classof(const FunctionType *) { return true; } 2438}; 2439 2440/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2441/// no information available about its arguments. 2442class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2443 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2444 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2445 /*Dependent=*/false, Result->isVariablyModifiedType(), 2446 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2447 2448 friend class ASTContext; // ASTContext creates these. 2449 2450public: 2451 // No additional state past what FunctionType provides. 2452 2453 bool isSugared() const { return false; } 2454 QualType desugar() const { return QualType(this, 0); } 2455 2456 void Profile(llvm::FoldingSetNodeID &ID) { 2457 Profile(ID, getResultType(), getExtInfo()); 2458 } 2459 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2460 ExtInfo Info) { 2461 Info.Profile(ID); 2462 ID.AddPointer(ResultType.getAsOpaquePtr()); 2463 } 2464 2465 static bool classof(const Type *T) { 2466 return T->getTypeClass() == FunctionNoProto; 2467 } 2468 static bool classof(const FunctionNoProtoType *) { return true; } 2469}; 2470 2471/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2472/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2473/// arguments, not as having a single void argument. Such a type can have an 2474/// exception specification, but this specification is not part of the canonical 2475/// type. 2476class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2477public: 2478 /// ExtProtoInfo - Extra information about a function prototype. 2479 struct ExtProtoInfo { 2480 ExtProtoInfo() : 2481 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2482 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0) {} 2483 2484 FunctionType::ExtInfo ExtInfo; 2485 bool Variadic; 2486 ExceptionSpecificationType ExceptionSpecType; 2487 unsigned char TypeQuals; 2488 RefQualifierKind RefQualifier; 2489 unsigned NumExceptions; 2490 const QualType *Exceptions; 2491 Expr *NoexceptExpr; 2492 }; 2493 2494private: 2495 /// \brief Determine whether there are any argument types that 2496 /// contain an unexpanded parameter pack. 2497 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2498 unsigned numArgs) { 2499 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2500 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2501 return true; 2502 2503 return false; 2504 } 2505 2506 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2507 QualType canonical, const ExtProtoInfo &epi); 2508 2509 /// NumArgs - The number of arguments this function has, not counting '...'. 2510 unsigned NumArgs : 20; 2511 2512 /// NumExceptions - The number of types in the exception spec, if any. 2513 unsigned NumExceptions : 9; 2514 2515 /// ExceptionSpecType - The type of exception specification this function has. 2516 unsigned ExceptionSpecType : 3; 2517 2518 /// ArgInfo - There is an variable size array after the class in memory that 2519 /// holds the argument types. 2520 2521 /// Exceptions - There is another variable size array after ArgInfo that 2522 /// holds the exception types. 2523 2524 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2525 /// to the expression in the noexcept() specifier. 2526 2527 friend class ASTContext; // ASTContext creates these. 2528 2529public: 2530 unsigned getNumArgs() const { return NumArgs; } 2531 QualType getArgType(unsigned i) const { 2532 assert(i < NumArgs && "Invalid argument number!"); 2533 return arg_type_begin()[i]; 2534 } 2535 2536 ExtProtoInfo getExtProtoInfo() const { 2537 ExtProtoInfo EPI; 2538 EPI.ExtInfo = getExtInfo(); 2539 EPI.Variadic = isVariadic(); 2540 EPI.ExceptionSpecType = getExceptionSpecType(); 2541 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2542 EPI.RefQualifier = getRefQualifier(); 2543 if (EPI.ExceptionSpecType == EST_Dynamic) { 2544 EPI.NumExceptions = NumExceptions; 2545 EPI.Exceptions = exception_begin(); 2546 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2547 EPI.NoexceptExpr = getNoexceptExpr(); 2548 } 2549 return EPI; 2550 } 2551 2552 /// \brief Get the kind of exception specification on this function. 2553 ExceptionSpecificationType getExceptionSpecType() const { 2554 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2555 } 2556 /// \brief Return whether this function has any kind of exception spec. 2557 bool hasExceptionSpec() const { 2558 return getExceptionSpecType() != EST_None; 2559 } 2560 /// \brief Return whether this function has a dynamic (throw) exception spec. 2561 bool hasDynamicExceptionSpec() const { 2562 return isDynamicExceptionSpec(getExceptionSpecType()); 2563 } 2564 /// \brief Return whether this function has a noexcept exception spec. 2565 bool hasNoexceptExceptionSpec() const { 2566 return isNoexceptExceptionSpec(getExceptionSpecType()); 2567 } 2568 /// \brief Result type of getNoexceptSpec(). 2569 enum NoexceptResult { 2570 NR_NoNoexcept, ///< There is no noexcept specifier. 2571 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2572 NR_Dependent, ///< The noexcept specifier is dependent. 2573 NR_Throw, ///< The noexcept specifier evaluates to false. 2574 NR_Nothrow ///< The noexcept specifier evaluates to true. 2575 }; 2576 /// \brief Get the meaning of the noexcept spec on this function, if any. 2577 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2578 unsigned getNumExceptions() const { return NumExceptions; } 2579 QualType getExceptionType(unsigned i) const { 2580 assert(i < NumExceptions && "Invalid exception number!"); 2581 return exception_begin()[i]; 2582 } 2583 Expr *getNoexceptExpr() const { 2584 if (getExceptionSpecType() != EST_ComputedNoexcept) 2585 return 0; 2586 // NoexceptExpr sits where the arguments end. 2587 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2588 } 2589 bool isNothrow(ASTContext &Ctx) const { 2590 ExceptionSpecificationType EST = getExceptionSpecType(); 2591 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2592 return true; 2593 if (EST != EST_ComputedNoexcept) 2594 return false; 2595 return getNoexceptSpec(Ctx) == NR_Nothrow; 2596 } 2597 2598 using FunctionType::isVariadic; 2599 2600 /// \brief Determines whether this function prototype contains a 2601 /// parameter pack at the end. 2602 /// 2603 /// A function template whose last parameter is a parameter pack can be 2604 /// called with an arbitrary number of arguments, much like a variadic 2605 /// function. However, 2606 bool isTemplateVariadic() const; 2607 2608 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2609 2610 2611 /// \brief Retrieve the ref-qualifier associated with this function type. 2612 RefQualifierKind getRefQualifier() const { 2613 return FunctionType::getRefQualifier(); 2614 } 2615 2616 typedef const QualType *arg_type_iterator; 2617 arg_type_iterator arg_type_begin() const { 2618 return reinterpret_cast<const QualType *>(this+1); 2619 } 2620 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2621 2622 typedef const QualType *exception_iterator; 2623 exception_iterator exception_begin() const { 2624 // exceptions begin where arguments end 2625 return arg_type_end(); 2626 } 2627 exception_iterator exception_end() const { 2628 if (getExceptionSpecType() != EST_Dynamic) 2629 return exception_begin(); 2630 return exception_begin() + NumExceptions; 2631 } 2632 2633 bool isSugared() const { return false; } 2634 QualType desugar() const { return QualType(this, 0); } 2635 2636 static bool classof(const Type *T) { 2637 return T->getTypeClass() == FunctionProto; 2638 } 2639 static bool classof(const FunctionProtoType *) { return true; } 2640 2641 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2642 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2643 arg_type_iterator ArgTys, unsigned NumArgs, 2644 const ExtProtoInfo &EPI, const ASTContext &Context); 2645}; 2646 2647 2648/// \brief Represents the dependent type named by a dependently-scoped 2649/// typename using declaration, e.g. 2650/// using typename Base<T>::foo; 2651/// Template instantiation turns these into the underlying type. 2652class UnresolvedUsingType : public Type { 2653 UnresolvedUsingTypenameDecl *Decl; 2654 2655 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2656 : Type(UnresolvedUsing, QualType(), true, false, 2657 /*ContainsUnexpandedParameterPack=*/false), 2658 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2659 friend class ASTContext; // ASTContext creates these. 2660public: 2661 2662 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2663 2664 bool isSugared() const { return false; } 2665 QualType desugar() const { return QualType(this, 0); } 2666 2667 static bool classof(const Type *T) { 2668 return T->getTypeClass() == UnresolvedUsing; 2669 } 2670 static bool classof(const UnresolvedUsingType *) { return true; } 2671 2672 void Profile(llvm::FoldingSetNodeID &ID) { 2673 return Profile(ID, Decl); 2674 } 2675 static void Profile(llvm::FoldingSetNodeID &ID, 2676 UnresolvedUsingTypenameDecl *D) { 2677 ID.AddPointer(D); 2678 } 2679}; 2680 2681 2682class TypedefType : public Type { 2683 TypedefNameDecl *Decl; 2684protected: 2685 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2686 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2687 /*ContainsUnexpandedParameterPack=*/false), 2688 Decl(const_cast<TypedefNameDecl*>(D)) { 2689 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2690 } 2691 friend class ASTContext; // ASTContext creates these. 2692public: 2693 2694 TypedefNameDecl *getDecl() const { return Decl; } 2695 2696 bool isSugared() const { return true; } 2697 QualType desugar() const; 2698 2699 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2700 static bool classof(const TypedefType *) { return true; } 2701}; 2702 2703/// TypeOfExprType (GCC extension). 2704class TypeOfExprType : public Type { 2705 Expr *TOExpr; 2706 2707protected: 2708 TypeOfExprType(Expr *E, QualType can = QualType()); 2709 friend class ASTContext; // ASTContext creates these. 2710public: 2711 Expr *getUnderlyingExpr() const { return TOExpr; } 2712 2713 /// \brief Remove a single level of sugar. 2714 QualType desugar() const; 2715 2716 /// \brief Returns whether this type directly provides sugar. 2717 bool isSugared() const { return true; } 2718 2719 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2720 static bool classof(const TypeOfExprType *) { return true; } 2721}; 2722 2723/// \brief Internal representation of canonical, dependent 2724/// typeof(expr) types. 2725/// 2726/// This class is used internally by the ASTContext to manage 2727/// canonical, dependent types, only. Clients will only see instances 2728/// of this class via TypeOfExprType nodes. 2729class DependentTypeOfExprType 2730 : public TypeOfExprType, public llvm::FoldingSetNode { 2731 const ASTContext &Context; 2732 2733public: 2734 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2735 : TypeOfExprType(E), Context(Context) { } 2736 2737 bool isSugared() const { return false; } 2738 QualType desugar() const { return QualType(this, 0); } 2739 2740 void Profile(llvm::FoldingSetNodeID &ID) { 2741 Profile(ID, Context, getUnderlyingExpr()); 2742 } 2743 2744 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2745 Expr *E); 2746}; 2747 2748/// TypeOfType (GCC extension). 2749class TypeOfType : public Type { 2750 QualType TOType; 2751 TypeOfType(QualType T, QualType can) 2752 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2753 T->containsUnexpandedParameterPack()), 2754 TOType(T) { 2755 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2756 } 2757 friend class ASTContext; // ASTContext creates these. 2758public: 2759 QualType getUnderlyingType() const { return TOType; } 2760 2761 /// \brief Remove a single level of sugar. 2762 QualType desugar() const { return getUnderlyingType(); } 2763 2764 /// \brief Returns whether this type directly provides sugar. 2765 bool isSugared() const { return true; } 2766 2767 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2768 static bool classof(const TypeOfType *) { return true; } 2769}; 2770 2771/// DecltypeType (C++0x) 2772class DecltypeType : public Type { 2773 Expr *E; 2774 2775 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2776 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2777 // from it. 2778 QualType UnderlyingType; 2779 2780protected: 2781 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2782 friend class ASTContext; // ASTContext creates these. 2783public: 2784 Expr *getUnderlyingExpr() const { return E; } 2785 QualType getUnderlyingType() const { return UnderlyingType; } 2786 2787 /// \brief Remove a single level of sugar. 2788 QualType desugar() const { return getUnderlyingType(); } 2789 2790 /// \brief Returns whether this type directly provides sugar. 2791 bool isSugared() const { return !isDependentType(); } 2792 2793 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2794 static bool classof(const DecltypeType *) { return true; } 2795}; 2796 2797/// \brief Internal representation of canonical, dependent 2798/// decltype(expr) types. 2799/// 2800/// This class is used internally by the ASTContext to manage 2801/// canonical, dependent types, only. Clients will only see instances 2802/// of this class via DecltypeType nodes. 2803class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2804 const ASTContext &Context; 2805 2806public: 2807 DependentDecltypeType(const ASTContext &Context, Expr *E); 2808 2809 bool isSugared() const { return false; } 2810 QualType desugar() const { return QualType(this, 0); } 2811 2812 void Profile(llvm::FoldingSetNodeID &ID) { 2813 Profile(ID, Context, getUnderlyingExpr()); 2814 } 2815 2816 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2817 Expr *E); 2818}; 2819 2820class TagType : public Type { 2821 /// Stores the TagDecl associated with this type. The decl may point to any 2822 /// TagDecl that declares the entity. 2823 TagDecl * decl; 2824 2825protected: 2826 TagType(TypeClass TC, const TagDecl *D, QualType can); 2827 2828public: 2829 TagDecl *getDecl() const; 2830 2831 /// @brief Determines whether this type is in the process of being 2832 /// defined. 2833 bool isBeingDefined() const; 2834 2835 static bool classof(const Type *T) { 2836 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2837 } 2838 static bool classof(const TagType *) { return true; } 2839 static bool classof(const RecordType *) { return true; } 2840 static bool classof(const EnumType *) { return true; } 2841}; 2842 2843/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2844/// to detect TagType objects of structs/unions/classes. 2845class RecordType : public TagType { 2846protected: 2847 explicit RecordType(const RecordDecl *D) 2848 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2849 explicit RecordType(TypeClass TC, RecordDecl *D) 2850 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2851 friend class ASTContext; // ASTContext creates these. 2852public: 2853 2854 RecordDecl *getDecl() const { 2855 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2856 } 2857 2858 // FIXME: This predicate is a helper to QualType/Type. It needs to 2859 // recursively check all fields for const-ness. If any field is declared 2860 // const, it needs to return false. 2861 bool hasConstFields() const { return false; } 2862 2863 bool isSugared() const { return false; } 2864 QualType desugar() const { return QualType(this, 0); } 2865 2866 static bool classof(const TagType *T); 2867 static bool classof(const Type *T) { 2868 return isa<TagType>(T) && classof(cast<TagType>(T)); 2869 } 2870 static bool classof(const RecordType *) { return true; } 2871}; 2872 2873/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2874/// to detect TagType objects of enums. 2875class EnumType : public TagType { 2876 explicit EnumType(const EnumDecl *D) 2877 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2878 friend class ASTContext; // ASTContext creates these. 2879public: 2880 2881 EnumDecl *getDecl() const { 2882 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2883 } 2884 2885 bool isSugared() const { return false; } 2886 QualType desugar() const { return QualType(this, 0); } 2887 2888 static bool classof(const TagType *T); 2889 static bool classof(const Type *T) { 2890 return isa<TagType>(T) && classof(cast<TagType>(T)); 2891 } 2892 static bool classof(const EnumType *) { return true; } 2893}; 2894 2895/// AttributedType - An attributed type is a type to which a type 2896/// attribute has been applied. The "modified type" is the 2897/// fully-sugared type to which the attributed type was applied; 2898/// generally it is not canonically equivalent to the attributed type. 2899/// The "equivalent type" is the minimally-desugared type which the 2900/// type is canonically equivalent to. 2901/// 2902/// For example, in the following attributed type: 2903/// int32_t __attribute__((vector_size(16))) 2904/// - the modified type is the TypedefType for int32_t 2905/// - the equivalent type is VectorType(16, int32_t) 2906/// - the canonical type is VectorType(16, int) 2907class AttributedType : public Type, public llvm::FoldingSetNode { 2908public: 2909 // It is really silly to have yet another attribute-kind enum, but 2910 // clang::attr::Kind doesn't currently cover the pure type attrs. 2911 enum Kind { 2912 // Expression operand. 2913 attr_address_space, 2914 attr_regparm, 2915 attr_vector_size, 2916 attr_neon_vector_type, 2917 attr_neon_polyvector_type, 2918 2919 FirstExprOperandKind = attr_address_space, 2920 LastExprOperandKind = attr_neon_polyvector_type, 2921 2922 // Enumerated operand (string or keyword). 2923 attr_objc_gc, 2924 attr_pcs, 2925 2926 FirstEnumOperandKind = attr_objc_gc, 2927 LastEnumOperandKind = attr_pcs, 2928 2929 // No operand. 2930 attr_noreturn, 2931 attr_cdecl, 2932 attr_fastcall, 2933 attr_stdcall, 2934 attr_thiscall, 2935 attr_pascal 2936 }; 2937 2938private: 2939 QualType ModifiedType; 2940 QualType EquivalentType; 2941 2942 friend class ASTContext; // creates these 2943 2944 AttributedType(QualType canon, Kind attrKind, 2945 QualType modified, QualType equivalent) 2946 : Type(Attributed, canon, canon->isDependentType(), 2947 canon->isVariablyModifiedType(), 2948 canon->containsUnexpandedParameterPack()), 2949 ModifiedType(modified), EquivalentType(equivalent) { 2950 AttributedTypeBits.AttrKind = attrKind; 2951 } 2952 2953public: 2954 Kind getAttrKind() const { 2955 return static_cast<Kind>(AttributedTypeBits.AttrKind); 2956 } 2957 2958 QualType getModifiedType() const { return ModifiedType; } 2959 QualType getEquivalentType() const { return EquivalentType; } 2960 2961 bool isSugared() const { return true; } 2962 QualType desugar() const { return getEquivalentType(); } 2963 2964 void Profile(llvm::FoldingSetNodeID &ID) { 2965 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 2966 } 2967 2968 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 2969 QualType modified, QualType equivalent) { 2970 ID.AddInteger(attrKind); 2971 ID.AddPointer(modified.getAsOpaquePtr()); 2972 ID.AddPointer(equivalent.getAsOpaquePtr()); 2973 } 2974 2975 static bool classof(const Type *T) { 2976 return T->getTypeClass() == Attributed; 2977 } 2978 static bool classof(const AttributedType *T) { return true; } 2979}; 2980 2981class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2982 // Helper data collector for canonical types. 2983 struct CanonicalTTPTInfo { 2984 unsigned Depth : 15; 2985 unsigned ParameterPack : 1; 2986 unsigned Index : 16; 2987 }; 2988 2989 union { 2990 // Info for the canonical type. 2991 CanonicalTTPTInfo CanTTPTInfo; 2992 // Info for the non-canonical type. 2993 TemplateTypeParmDecl *TTPDecl; 2994 }; 2995 2996 /// Build a non-canonical type. 2997 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 2998 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2999 /*VariablyModified=*/false, 3000 Canon->containsUnexpandedParameterPack()), 3001 TTPDecl(TTPDecl) { } 3002 3003 /// Build the canonical type. 3004 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3005 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 3006 /*VariablyModified=*/false, PP) { 3007 CanTTPTInfo.Depth = D; 3008 CanTTPTInfo.Index = I; 3009 CanTTPTInfo.ParameterPack = PP; 3010 } 3011 3012 friend class ASTContext; // ASTContext creates these 3013 3014 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3015 QualType Can = getCanonicalTypeInternal(); 3016 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3017 } 3018 3019public: 3020 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3021 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3022 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3023 3024 TemplateTypeParmDecl *getDecl() const { 3025 return isCanonicalUnqualified() ? 0 : TTPDecl; 3026 } 3027 3028 IdentifierInfo *getIdentifier() const; 3029 3030 bool isSugared() const { return false; } 3031 QualType desugar() const { return QualType(this, 0); } 3032 3033 void Profile(llvm::FoldingSetNodeID &ID) { 3034 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3035 } 3036 3037 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3038 unsigned Index, bool ParameterPack, 3039 TemplateTypeParmDecl *TTPDecl) { 3040 ID.AddInteger(Depth); 3041 ID.AddInteger(Index); 3042 ID.AddBoolean(ParameterPack); 3043 ID.AddPointer(TTPDecl); 3044 } 3045 3046 static bool classof(const Type *T) { 3047 return T->getTypeClass() == TemplateTypeParm; 3048 } 3049 static bool classof(const TemplateTypeParmType *T) { return true; } 3050}; 3051 3052/// \brief Represents the result of substituting a type for a template 3053/// type parameter. 3054/// 3055/// Within an instantiated template, all template type parameters have 3056/// been replaced with these. They are used solely to record that a 3057/// type was originally written as a template type parameter; 3058/// therefore they are never canonical. 3059class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3060 // The original type parameter. 3061 const TemplateTypeParmType *Replaced; 3062 3063 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3064 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3065 Canon->isVariablyModifiedType(), 3066 Canon->containsUnexpandedParameterPack()), 3067 Replaced(Param) { } 3068 3069 friend class ASTContext; 3070 3071public: 3072 /// Gets the template parameter that was substituted for. 3073 const TemplateTypeParmType *getReplacedParameter() const { 3074 return Replaced; 3075 } 3076 3077 /// Gets the type that was substituted for the template 3078 /// parameter. 3079 QualType getReplacementType() const { 3080 return getCanonicalTypeInternal(); 3081 } 3082 3083 bool isSugared() const { return true; } 3084 QualType desugar() const { return getReplacementType(); } 3085 3086 void Profile(llvm::FoldingSetNodeID &ID) { 3087 Profile(ID, getReplacedParameter(), getReplacementType()); 3088 } 3089 static void Profile(llvm::FoldingSetNodeID &ID, 3090 const TemplateTypeParmType *Replaced, 3091 QualType Replacement) { 3092 ID.AddPointer(Replaced); 3093 ID.AddPointer(Replacement.getAsOpaquePtr()); 3094 } 3095 3096 static bool classof(const Type *T) { 3097 return T->getTypeClass() == SubstTemplateTypeParm; 3098 } 3099 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3100}; 3101 3102/// \brief Represents the result of substituting a set of types for a template 3103/// type parameter pack. 3104/// 3105/// When a pack expansion in the source code contains multiple parameter packs 3106/// and those parameter packs correspond to different levels of template 3107/// parameter lists, this type node is used to represent a template type 3108/// parameter pack from an outer level, which has already had its argument pack 3109/// substituted but that still lives within a pack expansion that itself 3110/// could not be instantiated. When actually performing a substitution into 3111/// that pack expansion (e.g., when all template parameters have corresponding 3112/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3113/// at the current pack substitution index. 3114class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3115 /// \brief The original type parameter. 3116 const TemplateTypeParmType *Replaced; 3117 3118 /// \brief A pointer to the set of template arguments that this 3119 /// parameter pack is instantiated with. 3120 const TemplateArgument *Arguments; 3121 3122 /// \brief The number of template arguments in \c Arguments. 3123 unsigned NumArguments; 3124 3125 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3126 QualType Canon, 3127 const TemplateArgument &ArgPack); 3128 3129 friend class ASTContext; 3130 3131public: 3132 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3133 3134 /// Gets the template parameter that was substituted for. 3135 const TemplateTypeParmType *getReplacedParameter() const { 3136 return Replaced; 3137 } 3138 3139 bool isSugared() const { return false; } 3140 QualType desugar() const { return QualType(this, 0); } 3141 3142 TemplateArgument getArgumentPack() const; 3143 3144 void Profile(llvm::FoldingSetNodeID &ID); 3145 static void Profile(llvm::FoldingSetNodeID &ID, 3146 const TemplateTypeParmType *Replaced, 3147 const TemplateArgument &ArgPack); 3148 3149 static bool classof(const Type *T) { 3150 return T->getTypeClass() == SubstTemplateTypeParmPack; 3151 } 3152 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3153}; 3154 3155/// \brief Represents a C++0x auto type. 3156/// 3157/// These types are usually a placeholder for a deduced type. However, within 3158/// templates and before the initializer is attached, there is no deduced type 3159/// and an auto type is type-dependent and canonical. 3160class AutoType : public Type, public llvm::FoldingSetNode { 3161 AutoType(QualType DeducedType) 3162 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3163 /*Dependent=*/DeducedType.isNull(), 3164 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3165 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3166 "deduced a dependent type for auto"); 3167 } 3168 3169 friend class ASTContext; // ASTContext creates these 3170 3171public: 3172 bool isSugared() const { return isDeduced(); } 3173 QualType desugar() const { return getCanonicalTypeInternal(); } 3174 3175 QualType getDeducedType() const { 3176 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3177 } 3178 bool isDeduced() const { 3179 return !isDependentType(); 3180 } 3181 3182 void Profile(llvm::FoldingSetNodeID &ID) { 3183 Profile(ID, getDeducedType()); 3184 } 3185 3186 static void Profile(llvm::FoldingSetNodeID &ID, 3187 QualType Deduced) { 3188 ID.AddPointer(Deduced.getAsOpaquePtr()); 3189 } 3190 3191 static bool classof(const Type *T) { 3192 return T->getTypeClass() == Auto; 3193 } 3194 static bool classof(const AutoType *T) { return true; } 3195}; 3196 3197/// \brief Represents the type of a template specialization as written 3198/// in the source code. 3199/// 3200/// Template specialization types represent the syntactic form of a 3201/// template-id that refers to a type, e.g., @c vector<int>. Some 3202/// template specialization types are syntactic sugar, whose canonical 3203/// type will point to some other type node that represents the 3204/// instantiation or class template specialization. For example, a 3205/// class template specialization type of @c vector<int> will refer to 3206/// a tag type for the instantiation 3207/// @c std::vector<int, std::allocator<int>>. 3208/// 3209/// Other template specialization types, for which the template name 3210/// is dependent, may be canonical types. These types are always 3211/// dependent. 3212/// 3213/// An instance of this type is followed by an array of TemplateArgument*s, 3214/// then, if the template specialization type is for a type alias template, 3215/// a QualType representing the non-canonical aliased type. 3216class TemplateSpecializationType 3217 : public Type, public llvm::FoldingSetNode { 3218 /// \brief The name of the template being specialized. 3219 TemplateName Template; 3220 3221 /// \brief - The number of template arguments named in this class 3222 /// template specialization. 3223 unsigned NumArgs; 3224 3225 TemplateSpecializationType(TemplateName T, 3226 const TemplateArgument *Args, 3227 unsigned NumArgs, QualType Canon, 3228 QualType Aliased); 3229 3230 friend class ASTContext; // ASTContext creates these 3231 3232public: 3233 /// \brief Determine whether any of the given template arguments are 3234 /// dependent. 3235 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3236 unsigned NumArgs); 3237 3238 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3239 unsigned NumArgs); 3240 3241 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 3242 3243 /// \brief Print a template argument list, including the '<' and '>' 3244 /// enclosing the template arguments. 3245 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3246 unsigned NumArgs, 3247 const PrintingPolicy &Policy, 3248 bool SkipBrackets = false); 3249 3250 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3251 unsigned NumArgs, 3252 const PrintingPolicy &Policy); 3253 3254 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3255 const PrintingPolicy &Policy); 3256 3257 /// True if this template specialization type matches a current 3258 /// instantiation in the context in which it is found. 3259 bool isCurrentInstantiation() const { 3260 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3261 } 3262 3263 /// True if this template specialization type is for a type alias 3264 /// template. 3265 bool isTypeAlias() const; 3266 /// Get the aliased type, if this is a specialization of a type alias 3267 /// template. 3268 QualType getAliasedType() const { 3269 assert(isTypeAlias() && "not a type alias template specialization"); 3270 return *reinterpret_cast<const QualType*>(end()); 3271 } 3272 3273 typedef const TemplateArgument * iterator; 3274 3275 iterator begin() const { return getArgs(); } 3276 iterator end() const; // defined inline in TemplateBase.h 3277 3278 /// \brief Retrieve the name of the template that we are specializing. 3279 TemplateName getTemplateName() const { return Template; } 3280 3281 /// \brief Retrieve the template arguments. 3282 const TemplateArgument *getArgs() const { 3283 return reinterpret_cast<const TemplateArgument *>(this + 1); 3284 } 3285 3286 /// \brief Retrieve the number of template arguments. 3287 unsigned getNumArgs() const { return NumArgs; } 3288 3289 /// \brief Retrieve a specific template argument as a type. 3290 /// \precondition @c isArgType(Arg) 3291 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3292 3293 bool isSugared() const { 3294 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3295 } 3296 QualType desugar() const { return getCanonicalTypeInternal(); } 3297 3298 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3299 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3300 if (isTypeAlias()) 3301 getAliasedType().Profile(ID); 3302 } 3303 3304 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3305 const TemplateArgument *Args, 3306 unsigned NumArgs, 3307 const ASTContext &Context); 3308 3309 static bool classof(const Type *T) { 3310 return T->getTypeClass() == TemplateSpecialization; 3311 } 3312 static bool classof(const TemplateSpecializationType *T) { return true; } 3313}; 3314 3315/// \brief The injected class name of a C++ class template or class 3316/// template partial specialization. Used to record that a type was 3317/// spelled with a bare identifier rather than as a template-id; the 3318/// equivalent for non-templated classes is just RecordType. 3319/// 3320/// Injected class name types are always dependent. Template 3321/// instantiation turns these into RecordTypes. 3322/// 3323/// Injected class name types are always canonical. This works 3324/// because it is impossible to compare an injected class name type 3325/// with the corresponding non-injected template type, for the same 3326/// reason that it is impossible to directly compare template 3327/// parameters from different dependent contexts: injected class name 3328/// types can only occur within the scope of a particular templated 3329/// declaration, and within that scope every template specialization 3330/// will canonicalize to the injected class name (when appropriate 3331/// according to the rules of the language). 3332class InjectedClassNameType : public Type { 3333 CXXRecordDecl *Decl; 3334 3335 /// The template specialization which this type represents. 3336 /// For example, in 3337 /// template <class T> class A { ... }; 3338 /// this is A<T>, whereas in 3339 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3340 /// this is A<B<X,Y> >. 3341 /// 3342 /// It is always unqualified, always a template specialization type, 3343 /// and always dependent. 3344 QualType InjectedType; 3345 3346 friend class ASTContext; // ASTContext creates these. 3347 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3348 // currently suitable for AST reading, too much 3349 // interdependencies. 3350 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3351 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3352 /*VariablyModified=*/false, 3353 /*ContainsUnexpandedParameterPack=*/false), 3354 Decl(D), InjectedType(TST) { 3355 assert(isa<TemplateSpecializationType>(TST)); 3356 assert(!TST.hasQualifiers()); 3357 assert(TST->isDependentType()); 3358 } 3359 3360public: 3361 QualType getInjectedSpecializationType() const { return InjectedType; } 3362 const TemplateSpecializationType *getInjectedTST() const { 3363 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3364 } 3365 3366 CXXRecordDecl *getDecl() const; 3367 3368 bool isSugared() const { return false; } 3369 QualType desugar() const { return QualType(this, 0); } 3370 3371 static bool classof(const Type *T) { 3372 return T->getTypeClass() == InjectedClassName; 3373 } 3374 static bool classof(const InjectedClassNameType *T) { return true; } 3375}; 3376 3377/// \brief The kind of a tag type. 3378enum TagTypeKind { 3379 /// \brief The "struct" keyword. 3380 TTK_Struct, 3381 /// \brief The "union" keyword. 3382 TTK_Union, 3383 /// \brief The "class" keyword. 3384 TTK_Class, 3385 /// \brief The "enum" keyword. 3386 TTK_Enum 3387}; 3388 3389/// \brief The elaboration keyword that precedes a qualified type name or 3390/// introduces an elaborated-type-specifier. 3391enum ElaboratedTypeKeyword { 3392 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3393 ETK_Struct, 3394 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3395 ETK_Union, 3396 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3397 ETK_Class, 3398 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3399 ETK_Enum, 3400 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3401 /// \c typename T::type. 3402 ETK_Typename, 3403 /// \brief No keyword precedes the qualified type name. 3404 ETK_None 3405}; 3406 3407/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3408/// The keyword in stored in the free bits of the base class. 3409/// Also provides a few static helpers for converting and printing 3410/// elaborated type keyword and tag type kind enumerations. 3411class TypeWithKeyword : public Type { 3412protected: 3413 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3414 QualType Canonical, bool Dependent, bool VariablyModified, 3415 bool ContainsUnexpandedParameterPack) 3416 : Type(tc, Canonical, Dependent, VariablyModified, 3417 ContainsUnexpandedParameterPack) { 3418 TypeWithKeywordBits.Keyword = Keyword; 3419 } 3420 3421public: 3422 ElaboratedTypeKeyword getKeyword() const { 3423 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3424 } 3425 3426 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3427 /// into an elaborated type keyword. 3428 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3429 3430 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3431 /// into a tag type kind. It is an error to provide a type specifier 3432 /// which *isn't* a tag kind here. 3433 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3434 3435 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3436 /// elaborated type keyword. 3437 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3438 3439 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3440 // a TagTypeKind. It is an error to provide an elaborated type keyword 3441 /// which *isn't* a tag kind here. 3442 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3443 3444 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3445 3446 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3447 3448 static const char *getTagTypeKindName(TagTypeKind Kind) { 3449 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3450 } 3451 3452 class CannotCastToThisType {}; 3453 static CannotCastToThisType classof(const Type *); 3454}; 3455 3456/// \brief Represents a type that was referred to using an elaborated type 3457/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3458/// or both. 3459/// 3460/// This type is used to keep track of a type name as written in the 3461/// source code, including tag keywords and any nested-name-specifiers. 3462/// The type itself is always "sugar", used to express what was written 3463/// in the source code but containing no additional semantic information. 3464class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3465 3466 /// \brief The nested name specifier containing the qualifier. 3467 NestedNameSpecifier *NNS; 3468 3469 /// \brief The type that this qualified name refers to. 3470 QualType NamedType; 3471 3472 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3473 QualType NamedType, QualType CanonType) 3474 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3475 NamedType->isDependentType(), 3476 NamedType->isVariablyModifiedType(), 3477 NamedType->containsUnexpandedParameterPack()), 3478 NNS(NNS), NamedType(NamedType) { 3479 assert(!(Keyword == ETK_None && NNS == 0) && 3480 "ElaboratedType cannot have elaborated type keyword " 3481 "and name qualifier both null."); 3482 } 3483 3484 friend class ASTContext; // ASTContext creates these 3485 3486public: 3487 ~ElaboratedType(); 3488 3489 /// \brief Retrieve the qualification on this type. 3490 NestedNameSpecifier *getQualifier() const { return NNS; } 3491 3492 /// \brief Retrieve the type named by the qualified-id. 3493 QualType getNamedType() const { return NamedType; } 3494 3495 /// \brief Remove a single level of sugar. 3496 QualType desugar() const { return getNamedType(); } 3497 3498 /// \brief Returns whether this type directly provides sugar. 3499 bool isSugared() const { return true; } 3500 3501 void Profile(llvm::FoldingSetNodeID &ID) { 3502 Profile(ID, getKeyword(), NNS, NamedType); 3503 } 3504 3505 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3506 NestedNameSpecifier *NNS, QualType NamedType) { 3507 ID.AddInteger(Keyword); 3508 ID.AddPointer(NNS); 3509 NamedType.Profile(ID); 3510 } 3511 3512 static bool classof(const Type *T) { 3513 return T->getTypeClass() == Elaborated; 3514 } 3515 static bool classof(const ElaboratedType *T) { return true; } 3516}; 3517 3518/// \brief Represents a qualified type name for which the type name is 3519/// dependent. 3520/// 3521/// DependentNameType represents a class of dependent types that involve a 3522/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3523/// name of a type. The DependentNameType may start with a "typename" (for a 3524/// typename-specifier), "class", "struct", "union", or "enum" (for a 3525/// dependent elaborated-type-specifier), or nothing (in contexts where we 3526/// know that we must be referring to a type, e.g., in a base class specifier). 3527class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3528 3529 /// \brief The nested name specifier containing the qualifier. 3530 NestedNameSpecifier *NNS; 3531 3532 /// \brief The type that this typename specifier refers to. 3533 const IdentifierInfo *Name; 3534 3535 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3536 const IdentifierInfo *Name, QualType CanonType) 3537 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3538 /*VariablyModified=*/false, 3539 NNS->containsUnexpandedParameterPack()), 3540 NNS(NNS), Name(Name) { 3541 assert(NNS->isDependent() && 3542 "DependentNameType requires a dependent nested-name-specifier"); 3543 } 3544 3545 friend class ASTContext; // ASTContext creates these 3546 3547public: 3548 /// \brief Retrieve the qualification on this type. 3549 NestedNameSpecifier *getQualifier() const { return NNS; } 3550 3551 /// \brief Retrieve the type named by the typename specifier as an 3552 /// identifier. 3553 /// 3554 /// This routine will return a non-NULL identifier pointer when the 3555 /// form of the original typename was terminated by an identifier, 3556 /// e.g., "typename T::type". 3557 const IdentifierInfo *getIdentifier() const { 3558 return Name; 3559 } 3560 3561 bool isSugared() const { return false; } 3562 QualType desugar() const { return QualType(this, 0); } 3563 3564 void Profile(llvm::FoldingSetNodeID &ID) { 3565 Profile(ID, getKeyword(), NNS, Name); 3566 } 3567 3568 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3569 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3570 ID.AddInteger(Keyword); 3571 ID.AddPointer(NNS); 3572 ID.AddPointer(Name); 3573 } 3574 3575 static bool classof(const Type *T) { 3576 return T->getTypeClass() == DependentName; 3577 } 3578 static bool classof(const DependentNameType *T) { return true; } 3579}; 3580 3581/// DependentTemplateSpecializationType - Represents a template 3582/// specialization type whose template cannot be resolved, e.g. 3583/// A<T>::template B<T> 3584class DependentTemplateSpecializationType : 3585 public TypeWithKeyword, public llvm::FoldingSetNode { 3586 3587 /// \brief The nested name specifier containing the qualifier. 3588 NestedNameSpecifier *NNS; 3589 3590 /// \brief The identifier of the template. 3591 const IdentifierInfo *Name; 3592 3593 /// \brief - The number of template arguments named in this class 3594 /// template specialization. 3595 unsigned NumArgs; 3596 3597 const TemplateArgument *getArgBuffer() const { 3598 return reinterpret_cast<const TemplateArgument*>(this+1); 3599 } 3600 TemplateArgument *getArgBuffer() { 3601 return reinterpret_cast<TemplateArgument*>(this+1); 3602 } 3603 3604 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3605 NestedNameSpecifier *NNS, 3606 const IdentifierInfo *Name, 3607 unsigned NumArgs, 3608 const TemplateArgument *Args, 3609 QualType Canon); 3610 3611 friend class ASTContext; // ASTContext creates these 3612 3613public: 3614 NestedNameSpecifier *getQualifier() const { return NNS; } 3615 const IdentifierInfo *getIdentifier() const { return Name; } 3616 3617 /// \brief Retrieve the template arguments. 3618 const TemplateArgument *getArgs() const { 3619 return getArgBuffer(); 3620 } 3621 3622 /// \brief Retrieve the number of template arguments. 3623 unsigned getNumArgs() const { return NumArgs; } 3624 3625 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3626 3627 typedef const TemplateArgument * iterator; 3628 iterator begin() const { return getArgs(); } 3629 iterator end() const; // inline in TemplateBase.h 3630 3631 bool isSugared() const { return false; } 3632 QualType desugar() const { return QualType(this, 0); } 3633 3634 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3635 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3636 } 3637 3638 static void Profile(llvm::FoldingSetNodeID &ID, 3639 const ASTContext &Context, 3640 ElaboratedTypeKeyword Keyword, 3641 NestedNameSpecifier *Qualifier, 3642 const IdentifierInfo *Name, 3643 unsigned NumArgs, 3644 const TemplateArgument *Args); 3645 3646 static bool classof(const Type *T) { 3647 return T->getTypeClass() == DependentTemplateSpecialization; 3648 } 3649 static bool classof(const DependentTemplateSpecializationType *T) { 3650 return true; 3651 } 3652}; 3653 3654/// \brief Represents a pack expansion of types. 3655/// 3656/// Pack expansions are part of C++0x variadic templates. A pack 3657/// expansion contains a pattern, which itself contains one or more 3658/// "unexpanded" parameter packs. When instantiated, a pack expansion 3659/// produces a series of types, each instantiated from the pattern of 3660/// the expansion, where the Ith instantiation of the pattern uses the 3661/// Ith arguments bound to each of the unexpanded parameter packs. The 3662/// pack expansion is considered to "expand" these unexpanded 3663/// parameter packs. 3664/// 3665/// \code 3666/// template<typename ...Types> struct tuple; 3667/// 3668/// template<typename ...Types> 3669/// struct tuple_of_references { 3670/// typedef tuple<Types&...> type; 3671/// }; 3672/// \endcode 3673/// 3674/// Here, the pack expansion \c Types&... is represented via a 3675/// PackExpansionType whose pattern is Types&. 3676class PackExpansionType : public Type, public llvm::FoldingSetNode { 3677 /// \brief The pattern of the pack expansion. 3678 QualType Pattern; 3679 3680 /// \brief The number of expansions that this pack expansion will 3681 /// generate when substituted (+1), or indicates that 3682 /// 3683 /// This field will only have a non-zero value when some of the parameter 3684 /// packs that occur within the pattern have been substituted but others have 3685 /// not. 3686 unsigned NumExpansions; 3687 3688 PackExpansionType(QualType Pattern, QualType Canon, 3689 llvm::Optional<unsigned> NumExpansions) 3690 : Type(PackExpansion, Canon, /*Dependent=*/true, 3691 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3692 /*ContainsUnexpandedParameterPack=*/false), 3693 Pattern(Pattern), 3694 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3695 3696 friend class ASTContext; // ASTContext creates these 3697 3698public: 3699 /// \brief Retrieve the pattern of this pack expansion, which is the 3700 /// type that will be repeatedly instantiated when instantiating the 3701 /// pack expansion itself. 3702 QualType getPattern() const { return Pattern; } 3703 3704 /// \brief Retrieve the number of expansions that this pack expansion will 3705 /// generate, if known. 3706 llvm::Optional<unsigned> getNumExpansions() const { 3707 if (NumExpansions) 3708 return NumExpansions - 1; 3709 3710 return llvm::Optional<unsigned>(); 3711 } 3712 3713 bool isSugared() const { return false; } 3714 QualType desugar() const { return QualType(this, 0); } 3715 3716 void Profile(llvm::FoldingSetNodeID &ID) { 3717 Profile(ID, getPattern(), getNumExpansions()); 3718 } 3719 3720 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3721 llvm::Optional<unsigned> NumExpansions) { 3722 ID.AddPointer(Pattern.getAsOpaquePtr()); 3723 ID.AddBoolean(NumExpansions); 3724 if (NumExpansions) 3725 ID.AddInteger(*NumExpansions); 3726 } 3727 3728 static bool classof(const Type *T) { 3729 return T->getTypeClass() == PackExpansion; 3730 } 3731 static bool classof(const PackExpansionType *T) { 3732 return true; 3733 } 3734}; 3735 3736/// ObjCObjectType - Represents a class type in Objective C. 3737/// Every Objective C type is a combination of a base type and a 3738/// list of protocols. 3739/// 3740/// Given the following declarations: 3741/// @class C; 3742/// @protocol P; 3743/// 3744/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3745/// with base C and no protocols. 3746/// 3747/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3748/// 3749/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3750/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3751/// and no protocols. 3752/// 3753/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3754/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3755/// this should get its own sugar class to better represent the source. 3756class ObjCObjectType : public Type { 3757 // ObjCObjectType.NumProtocols - the number of protocols stored 3758 // after the ObjCObjectPointerType node. 3759 // 3760 // These protocols are those written directly on the type. If 3761 // protocol qualifiers ever become additive, the iterators will need 3762 // to get kindof complicated. 3763 // 3764 // In the canonical object type, these are sorted alphabetically 3765 // and uniqued. 3766 3767 /// Either a BuiltinType or an InterfaceType or sugar for either. 3768 QualType BaseType; 3769 3770 ObjCProtocolDecl * const *getProtocolStorage() const { 3771 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3772 } 3773 3774 ObjCProtocolDecl **getProtocolStorage(); 3775 3776protected: 3777 ObjCObjectType(QualType Canonical, QualType Base, 3778 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3779 3780 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3781 ObjCObjectType(enum Nonce_ObjCInterface) 3782 : Type(ObjCInterface, QualType(), false, false, false), 3783 BaseType(QualType(this_(), 0)) { 3784 ObjCObjectTypeBits.NumProtocols = 0; 3785 } 3786 3787public: 3788 /// getBaseType - Gets the base type of this object type. This is 3789 /// always (possibly sugar for) one of: 3790 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3791 /// user, which is a typedef for an ObjCPointerType) 3792 /// - the 'Class' builtin type (same caveat) 3793 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3794 QualType getBaseType() const { return BaseType; } 3795 3796 bool isObjCId() const { 3797 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3798 } 3799 bool isObjCClass() const { 3800 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3801 } 3802 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3803 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3804 bool isObjCUnqualifiedIdOrClass() const { 3805 if (!qual_empty()) return false; 3806 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3807 return T->getKind() == BuiltinType::ObjCId || 3808 T->getKind() == BuiltinType::ObjCClass; 3809 return false; 3810 } 3811 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3812 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3813 3814 /// Gets the interface declaration for this object type, if the base type 3815 /// really is an interface. 3816 ObjCInterfaceDecl *getInterface() const; 3817 3818 typedef ObjCProtocolDecl * const *qual_iterator; 3819 3820 qual_iterator qual_begin() const { return getProtocolStorage(); } 3821 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3822 3823 bool qual_empty() const { return getNumProtocols() == 0; } 3824 3825 /// getNumProtocols - Return the number of qualifying protocols in this 3826 /// interface type, or 0 if there are none. 3827 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3828 3829 /// \brief Fetch a protocol by index. 3830 ObjCProtocolDecl *getProtocol(unsigned I) const { 3831 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3832 return qual_begin()[I]; 3833 } 3834 3835 bool isSugared() const { return false; } 3836 QualType desugar() const { return QualType(this, 0); } 3837 3838 static bool classof(const Type *T) { 3839 return T->getTypeClass() == ObjCObject || 3840 T->getTypeClass() == ObjCInterface; 3841 } 3842 static bool classof(const ObjCObjectType *) { return true; } 3843}; 3844 3845/// ObjCObjectTypeImpl - A class providing a concrete implementation 3846/// of ObjCObjectType, so as to not increase the footprint of 3847/// ObjCInterfaceType. Code outside of ASTContext and the core type 3848/// system should not reference this type. 3849class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3850 friend class ASTContext; 3851 3852 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3853 // will need to be modified. 3854 3855 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3856 ObjCProtocolDecl * const *Protocols, 3857 unsigned NumProtocols) 3858 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3859 3860public: 3861 void Profile(llvm::FoldingSetNodeID &ID); 3862 static void Profile(llvm::FoldingSetNodeID &ID, 3863 QualType Base, 3864 ObjCProtocolDecl *const *protocols, 3865 unsigned NumProtocols); 3866}; 3867 3868inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3869 return reinterpret_cast<ObjCProtocolDecl**>( 3870 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3871} 3872 3873/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3874/// object oriented design. They basically correspond to C++ classes. There 3875/// are two kinds of interface types, normal interfaces like "NSString" and 3876/// qualified interfaces, which are qualified with a protocol list like 3877/// "NSString<NSCopyable, NSAmazing>". 3878/// 3879/// ObjCInterfaceType guarantees the following properties when considered 3880/// as a subtype of its superclass, ObjCObjectType: 3881/// - There are no protocol qualifiers. To reinforce this, code which 3882/// tries to invoke the protocol methods via an ObjCInterfaceType will 3883/// fail to compile. 3884/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3885/// T->getBaseType() == QualType(T, 0). 3886class ObjCInterfaceType : public ObjCObjectType { 3887 ObjCInterfaceDecl *Decl; 3888 3889 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3890 : ObjCObjectType(Nonce_ObjCInterface), 3891 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3892 friend class ASTContext; // ASTContext creates these. 3893 3894public: 3895 /// getDecl - Get the declaration of this interface. 3896 ObjCInterfaceDecl *getDecl() const { return Decl; } 3897 3898 bool isSugared() const { return false; } 3899 QualType desugar() const { return QualType(this, 0); } 3900 3901 static bool classof(const Type *T) { 3902 return T->getTypeClass() == ObjCInterface; 3903 } 3904 static bool classof(const ObjCInterfaceType *) { return true; } 3905 3906 // Nonsense to "hide" certain members of ObjCObjectType within this 3907 // class. People asking for protocols on an ObjCInterfaceType are 3908 // not going to get what they want: ObjCInterfaceTypes are 3909 // guaranteed to have no protocols. 3910 enum { 3911 qual_iterator, 3912 qual_begin, 3913 qual_end, 3914 getNumProtocols, 3915 getProtocol 3916 }; 3917}; 3918 3919inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3920 if (const ObjCInterfaceType *T = 3921 getBaseType()->getAs<ObjCInterfaceType>()) 3922 return T->getDecl(); 3923 return 0; 3924} 3925 3926/// ObjCObjectPointerType - Used to represent a pointer to an 3927/// Objective C object. These are constructed from pointer 3928/// declarators when the pointee type is an ObjCObjectType (or sugar 3929/// for one). In addition, the 'id' and 'Class' types are typedefs 3930/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3931/// are translated into these. 3932/// 3933/// Pointers to pointers to Objective C objects are still PointerTypes; 3934/// only the first level of pointer gets it own type implementation. 3935class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3936 QualType PointeeType; 3937 3938 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3939 : Type(ObjCObjectPointer, Canonical, false, false, false), 3940 PointeeType(Pointee) {} 3941 friend class ASTContext; // ASTContext creates these. 3942 3943public: 3944 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3945 /// The result will always be an ObjCObjectType or sugar thereof. 3946 QualType getPointeeType() const { return PointeeType; } 3947 3948 /// getObjCObjectType - Gets the type pointed to by this ObjC 3949 /// pointer. This method always returns non-null. 3950 /// 3951 /// This method is equivalent to getPointeeType() except that 3952 /// it discards any typedefs (or other sugar) between this 3953 /// type and the "outermost" object type. So for: 3954 /// @class A; @protocol P; @protocol Q; 3955 /// typedef A<P> AP; 3956 /// typedef A A1; 3957 /// typedef A1<P> A1P; 3958 /// typedef A1P<Q> A1PQ; 3959 /// For 'A*', getObjectType() will return 'A'. 3960 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3961 /// For 'AP*', getObjectType() will return 'A<P>'. 3962 /// For 'A1*', getObjectType() will return 'A'. 3963 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3964 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3965 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3966 /// adding protocols to a protocol-qualified base discards the 3967 /// old qualifiers (for now). But if it didn't, getObjectType() 3968 /// would return 'A1P<Q>' (and we'd have to make iterating over 3969 /// qualifiers more complicated). 3970 const ObjCObjectType *getObjectType() const { 3971 return PointeeType->castAs<ObjCObjectType>(); 3972 } 3973 3974 /// getInterfaceType - If this pointer points to an Objective C 3975 /// @interface type, gets the type for that interface. Any protocol 3976 /// qualifiers on the interface are ignored. 3977 /// 3978 /// \return null if the base type for this pointer is 'id' or 'Class' 3979 const ObjCInterfaceType *getInterfaceType() const { 3980 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3981 } 3982 3983 /// getInterfaceDecl - If this pointer points to an Objective @interface 3984 /// type, gets the declaration for that interface. 3985 /// 3986 /// \return null if the base type for this pointer is 'id' or 'Class' 3987 ObjCInterfaceDecl *getInterfaceDecl() const { 3988 return getObjectType()->getInterface(); 3989 } 3990 3991 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3992 /// its object type is the primitive 'id' type with no protocols. 3993 bool isObjCIdType() const { 3994 return getObjectType()->isObjCUnqualifiedId(); 3995 } 3996 3997 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3998 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3999 bool isObjCClassType() const { 4000 return getObjectType()->isObjCUnqualifiedClass(); 4001 } 4002 4003 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4004 /// non-empty set of protocols. 4005 bool isObjCQualifiedIdType() const { 4006 return getObjectType()->isObjCQualifiedId(); 4007 } 4008 4009 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4010 /// some non-empty set of protocols. 4011 bool isObjCQualifiedClassType() const { 4012 return getObjectType()->isObjCQualifiedClass(); 4013 } 4014 4015 /// An iterator over the qualifiers on the object type. Provided 4016 /// for convenience. This will always iterate over the full set of 4017 /// protocols on a type, not just those provided directly. 4018 typedef ObjCObjectType::qual_iterator qual_iterator; 4019 4020 qual_iterator qual_begin() const { 4021 return getObjectType()->qual_begin(); 4022 } 4023 qual_iterator qual_end() const { 4024 return getObjectType()->qual_end(); 4025 } 4026 bool qual_empty() const { return getObjectType()->qual_empty(); } 4027 4028 /// getNumProtocols - Return the number of qualifying protocols on 4029 /// the object type. 4030 unsigned getNumProtocols() const { 4031 return getObjectType()->getNumProtocols(); 4032 } 4033 4034 /// \brief Retrieve a qualifying protocol by index on the object 4035 /// type. 4036 ObjCProtocolDecl *getProtocol(unsigned I) const { 4037 return getObjectType()->getProtocol(I); 4038 } 4039 4040 bool isSugared() const { return false; } 4041 QualType desugar() const { return QualType(this, 0); } 4042 4043 void Profile(llvm::FoldingSetNodeID &ID) { 4044 Profile(ID, getPointeeType()); 4045 } 4046 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4047 ID.AddPointer(T.getAsOpaquePtr()); 4048 } 4049 static bool classof(const Type *T) { 4050 return T->getTypeClass() == ObjCObjectPointer; 4051 } 4052 static bool classof(const ObjCObjectPointerType *) { return true; } 4053}; 4054 4055/// A qualifier set is used to build a set of qualifiers. 4056class QualifierCollector : public Qualifiers { 4057public: 4058 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4059 4060 /// Collect any qualifiers on the given type and return an 4061 /// unqualified type. The qualifiers are assumed to be consistent 4062 /// with those already in the type. 4063 const Type *strip(QualType type) { 4064 addFastQualifiers(type.getLocalFastQualifiers()); 4065 if (!type.hasLocalNonFastQualifiers()) 4066 return type.getTypePtrUnsafe(); 4067 4068 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4069 addConsistentQualifiers(extQuals->getQualifiers()); 4070 return extQuals->getBaseType(); 4071 } 4072 4073 /// Apply the collected qualifiers to the given type. 4074 QualType apply(const ASTContext &Context, QualType QT) const; 4075 4076 /// Apply the collected qualifiers to the given type. 4077 QualType apply(const ASTContext &Context, const Type* T) const; 4078}; 4079 4080 4081// Inline function definitions. 4082 4083inline const Type *QualType::getTypePtr() const { 4084 return getCommonPtr()->BaseType; 4085} 4086 4087inline const Type *QualType::getTypePtrOrNull() const { 4088 return (isNull() ? 0 : getCommonPtr()->BaseType); 4089} 4090 4091inline SplitQualType QualType::split() const { 4092 if (!hasLocalNonFastQualifiers()) 4093 return SplitQualType(getTypePtrUnsafe(), 4094 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4095 4096 const ExtQuals *eq = getExtQualsUnsafe(); 4097 Qualifiers qs = eq->getQualifiers(); 4098 qs.addFastQualifiers(getLocalFastQualifiers()); 4099 return SplitQualType(eq->getBaseType(), qs); 4100} 4101 4102inline Qualifiers QualType::getLocalQualifiers() const { 4103 Qualifiers Quals; 4104 if (hasLocalNonFastQualifiers()) 4105 Quals = getExtQualsUnsafe()->getQualifiers(); 4106 Quals.addFastQualifiers(getLocalFastQualifiers()); 4107 return Quals; 4108} 4109 4110inline Qualifiers QualType::getQualifiers() const { 4111 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4112 quals.addFastQualifiers(getLocalFastQualifiers()); 4113 return quals; 4114} 4115 4116inline unsigned QualType::getCVRQualifiers() const { 4117 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4118 cvr |= getLocalCVRQualifiers(); 4119 return cvr; 4120} 4121 4122inline QualType QualType::getCanonicalType() const { 4123 QualType canon = getCommonPtr()->CanonicalType; 4124 return canon.withFastQualifiers(getLocalFastQualifiers()); 4125} 4126 4127inline bool QualType::isCanonical() const { 4128 return getTypePtr()->isCanonicalUnqualified(); 4129} 4130 4131inline bool QualType::isCanonicalAsParam() const { 4132 if (!isCanonical()) return false; 4133 if (hasLocalQualifiers()) return false; 4134 4135 const Type *T = getTypePtr(); 4136 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4137 return false; 4138 4139 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4140} 4141 4142inline bool QualType::isConstQualified() const { 4143 return isLocalConstQualified() || 4144 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4145} 4146 4147inline bool QualType::isRestrictQualified() const { 4148 return isLocalRestrictQualified() || 4149 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4150} 4151 4152 4153inline bool QualType::isVolatileQualified() const { 4154 return isLocalVolatileQualified() || 4155 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4156} 4157 4158inline bool QualType::hasQualifiers() const { 4159 return hasLocalQualifiers() || 4160 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4161} 4162 4163inline QualType QualType::getUnqualifiedType() const { 4164 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4165 return QualType(getTypePtr(), 0); 4166 4167 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4168} 4169 4170inline SplitQualType QualType::getSplitUnqualifiedType() const { 4171 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4172 return split(); 4173 4174 return getSplitUnqualifiedTypeImpl(*this); 4175} 4176 4177inline void QualType::removeLocalConst() { 4178 removeLocalFastQualifiers(Qualifiers::Const); 4179} 4180 4181inline void QualType::removeLocalRestrict() { 4182 removeLocalFastQualifiers(Qualifiers::Restrict); 4183} 4184 4185inline void QualType::removeLocalVolatile() { 4186 removeLocalFastQualifiers(Qualifiers::Volatile); 4187} 4188 4189inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4190 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4191 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4192 4193 // Fast path: we don't need to touch the slow qualifiers. 4194 removeLocalFastQualifiers(Mask); 4195} 4196 4197/// getAddressSpace - Return the address space of this type. 4198inline unsigned QualType::getAddressSpace() const { 4199 return getQualifiers().getAddressSpace(); 4200} 4201 4202/// getObjCGCAttr - Return the gc attribute of this type. 4203inline Qualifiers::GC QualType::getObjCGCAttr() const { 4204 return getQualifiers().getObjCGCAttr(); 4205} 4206 4207inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4208 if (const PointerType *PT = t.getAs<PointerType>()) { 4209 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4210 return FT->getExtInfo(); 4211 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4212 return FT->getExtInfo(); 4213 4214 return FunctionType::ExtInfo(); 4215} 4216 4217inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4218 return getFunctionExtInfo(*t); 4219} 4220 4221/// isMoreQualifiedThan - Determine whether this type is more 4222/// qualified than the Other type. For example, "const volatile int" 4223/// is more qualified than "const int", "volatile int", and 4224/// "int". However, it is not more qualified than "const volatile 4225/// int". 4226inline bool QualType::isMoreQualifiedThan(QualType other) const { 4227 Qualifiers myQuals = getQualifiers(); 4228 Qualifiers otherQuals = other.getQualifiers(); 4229 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4230} 4231 4232/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4233/// as qualified as the Other type. For example, "const volatile 4234/// int" is at least as qualified as "const int", "volatile int", 4235/// "int", and "const volatile int". 4236inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4237 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4238} 4239 4240/// getNonReferenceType - If Type is a reference type (e.g., const 4241/// int&), returns the type that the reference refers to ("const 4242/// int"). Otherwise, returns the type itself. This routine is used 4243/// throughout Sema to implement C++ 5p6: 4244/// 4245/// If an expression initially has the type "reference to T" (8.3.2, 4246/// 8.5.3), the type is adjusted to "T" prior to any further 4247/// analysis, the expression designates the object or function 4248/// denoted by the reference, and the expression is an lvalue. 4249inline QualType QualType::getNonReferenceType() const { 4250 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4251 return RefType->getPointeeType(); 4252 else 4253 return *this; 4254} 4255 4256/// \brief Tests whether the type is categorized as a fundamental type. 4257/// 4258/// \returns True for types specified in C++0x [basic.fundamental]. 4259inline bool Type::isFundamentalType() const { 4260 return isVoidType() || 4261 // FIXME: It's really annoying that we don't have an 4262 // 'isArithmeticType()' which agrees with the standard definition. 4263 (isArithmeticType() && !isEnumeralType()); 4264} 4265 4266/// \brief Tests whether the type is categorized as a compound type. 4267/// 4268/// \returns True for types specified in C++0x [basic.compound]. 4269inline bool Type::isCompoundType() const { 4270 // C++0x [basic.compound]p1: 4271 // Compound types can be constructed in the following ways: 4272 // -- arrays of objects of a given type [...]; 4273 return isArrayType() || 4274 // -- functions, which have parameters of given types [...]; 4275 isFunctionType() || 4276 // -- pointers to void or objects or functions [...]; 4277 isPointerType() || 4278 // -- references to objects or functions of a given type. [...] 4279 isReferenceType() || 4280 // -- classes containing a sequence of objects of various types, [...]; 4281 isRecordType() || 4282 // -- unions, which ar classes capable of containing objects of different types at different times; 4283 isUnionType() || 4284 // -- enumerations, which comprise a set of named constant values. [...]; 4285 isEnumeralType() || 4286 // -- pointers to non-static class members, [...]. 4287 isMemberPointerType(); 4288} 4289 4290inline bool Type::isFunctionType() const { 4291 return isa<FunctionType>(CanonicalType); 4292} 4293inline bool Type::isPointerType() const { 4294 return isa<PointerType>(CanonicalType); 4295} 4296inline bool Type::isAnyPointerType() const { 4297 return isPointerType() || isObjCObjectPointerType(); 4298} 4299inline bool Type::isBlockPointerType() const { 4300 return isa<BlockPointerType>(CanonicalType); 4301} 4302inline bool Type::isReferenceType() const { 4303 return isa<ReferenceType>(CanonicalType); 4304} 4305inline bool Type::isLValueReferenceType() const { 4306 return isa<LValueReferenceType>(CanonicalType); 4307} 4308inline bool Type::isRValueReferenceType() const { 4309 return isa<RValueReferenceType>(CanonicalType); 4310} 4311inline bool Type::isFunctionPointerType() const { 4312 if (const PointerType *T = getAs<PointerType>()) 4313 return T->getPointeeType()->isFunctionType(); 4314 else 4315 return false; 4316} 4317inline bool Type::isMemberPointerType() const { 4318 return isa<MemberPointerType>(CanonicalType); 4319} 4320inline bool Type::isMemberFunctionPointerType() const { 4321 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4322 return T->isMemberFunctionPointer(); 4323 else 4324 return false; 4325} 4326inline bool Type::isMemberDataPointerType() const { 4327 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4328 return T->isMemberDataPointer(); 4329 else 4330 return false; 4331} 4332inline bool Type::isArrayType() const { 4333 return isa<ArrayType>(CanonicalType); 4334} 4335inline bool Type::isConstantArrayType() const { 4336 return isa<ConstantArrayType>(CanonicalType); 4337} 4338inline bool Type::isIncompleteArrayType() const { 4339 return isa<IncompleteArrayType>(CanonicalType); 4340} 4341inline bool Type::isVariableArrayType() const { 4342 return isa<VariableArrayType>(CanonicalType); 4343} 4344inline bool Type::isDependentSizedArrayType() const { 4345 return isa<DependentSizedArrayType>(CanonicalType); 4346} 4347inline bool Type::isBuiltinType() const { 4348 return isa<BuiltinType>(CanonicalType); 4349} 4350inline bool Type::isRecordType() const { 4351 return isa<RecordType>(CanonicalType); 4352} 4353inline bool Type::isEnumeralType() const { 4354 return isa<EnumType>(CanonicalType); 4355} 4356inline bool Type::isAnyComplexType() const { 4357 return isa<ComplexType>(CanonicalType); 4358} 4359inline bool Type::isVectorType() const { 4360 return isa<VectorType>(CanonicalType); 4361} 4362inline bool Type::isExtVectorType() const { 4363 return isa<ExtVectorType>(CanonicalType); 4364} 4365inline bool Type::isObjCObjectPointerType() const { 4366 return isa<ObjCObjectPointerType>(CanonicalType); 4367} 4368inline bool Type::isObjCObjectType() const { 4369 return isa<ObjCObjectType>(CanonicalType); 4370} 4371inline bool Type::isObjCObjectOrInterfaceType() const { 4372 return isa<ObjCInterfaceType>(CanonicalType) || 4373 isa<ObjCObjectType>(CanonicalType); 4374} 4375 4376inline bool Type::isObjCQualifiedIdType() const { 4377 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4378 return OPT->isObjCQualifiedIdType(); 4379 return false; 4380} 4381inline bool Type::isObjCQualifiedClassType() const { 4382 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4383 return OPT->isObjCQualifiedClassType(); 4384 return false; 4385} 4386inline bool Type::isObjCIdType() const { 4387 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4388 return OPT->isObjCIdType(); 4389 return false; 4390} 4391inline bool Type::isObjCClassType() const { 4392 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4393 return OPT->isObjCClassType(); 4394 return false; 4395} 4396inline bool Type::isObjCSelType() const { 4397 if (const PointerType *OPT = getAs<PointerType>()) 4398 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4399 return false; 4400} 4401inline bool Type::isObjCBuiltinType() const { 4402 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4403} 4404inline bool Type::isTemplateTypeParmType() const { 4405 return isa<TemplateTypeParmType>(CanonicalType); 4406} 4407 4408inline bool Type::isSpecificBuiltinType(unsigned K) const { 4409 if (const BuiltinType *BT = getAs<BuiltinType>()) 4410 if (BT->getKind() == (BuiltinType::Kind) K) 4411 return true; 4412 return false; 4413} 4414 4415inline bool Type::isPlaceholderType() const { 4416 if (const BuiltinType *BT = getAs<BuiltinType>()) 4417 return BT->isPlaceholderType(); 4418 return false; 4419} 4420 4421inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4422 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4423 return (BT->getKind() == (BuiltinType::Kind) K); 4424 return false; 4425} 4426 4427/// \brief Determines whether this is a type for which one can define 4428/// an overloaded operator. 4429inline bool Type::isOverloadableType() const { 4430 return isDependentType() || isRecordType() || isEnumeralType(); 4431} 4432 4433inline bool Type::hasPointerRepresentation() const { 4434 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4435 isObjCObjectPointerType() || isNullPtrType()); 4436} 4437 4438inline bool Type::hasObjCPointerRepresentation() const { 4439 return isObjCObjectPointerType(); 4440} 4441 4442inline const Type *Type::getBaseElementTypeUnsafe() const { 4443 const Type *type = this; 4444 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4445 type = arrayType->getElementType().getTypePtr(); 4446 return type; 4447} 4448 4449/// Insertion operator for diagnostics. This allows sending QualType's into a 4450/// diagnostic with <<. 4451inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4452 QualType T) { 4453 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4454 Diagnostic::ak_qualtype); 4455 return DB; 4456} 4457 4458/// Insertion operator for partial diagnostics. This allows sending QualType's 4459/// into a diagnostic with <<. 4460inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4461 QualType T) { 4462 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4463 Diagnostic::ak_qualtype); 4464 return PD; 4465} 4466 4467// Helper class template that is used by Type::getAs to ensure that one does 4468// not try to look through a qualified type to get to an array type. 4469template<typename T, 4470 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4471 llvm::is_base_of<ArrayType, T>::value)> 4472struct ArrayType_cannot_be_used_with_getAs { }; 4473 4474template<typename T> 4475struct ArrayType_cannot_be_used_with_getAs<T, true>; 4476 4477/// Member-template getAs<specific type>'. 4478template <typename T> const T *Type::getAs() const { 4479 ArrayType_cannot_be_used_with_getAs<T> at; 4480 (void)at; 4481 4482 // If this is directly a T type, return it. 4483 if (const T *Ty = dyn_cast<T>(this)) 4484 return Ty; 4485 4486 // If the canonical form of this type isn't the right kind, reject it. 4487 if (!isa<T>(CanonicalType)) 4488 return 0; 4489 4490 // If this is a typedef for the type, strip the typedef off without 4491 // losing all typedef information. 4492 return cast<T>(getUnqualifiedDesugaredType()); 4493} 4494 4495inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4496 // If this is directly an array type, return it. 4497 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4498 return arr; 4499 4500 // If the canonical form of this type isn't the right kind, reject it. 4501 if (!isa<ArrayType>(CanonicalType)) 4502 return 0; 4503 4504 // If this is a typedef for the type, strip the typedef off without 4505 // losing all typedef information. 4506 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4507} 4508 4509template <typename T> const T *Type::castAs() const { 4510 ArrayType_cannot_be_used_with_getAs<T> at; 4511 (void) at; 4512 4513 assert(isa<T>(CanonicalType)); 4514 if (const T *ty = dyn_cast<T>(this)) return ty; 4515 return cast<T>(getUnqualifiedDesugaredType()); 4516} 4517 4518inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4519 assert(isa<ArrayType>(CanonicalType)); 4520 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4521 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4522} 4523 4524} // end namespace clang 4525 4526#endif 4527