Type.h revision 308742c87e2311c3f349092e5b823c3821e61b10
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 /// addVolatile - add the specified type qualifier to this QualType. 542 void addVolatile() { 543 addFastQualifiers(Qualifiers::Volatile); 544 } 545 QualType withVolatile() const { 546 return withFastQualifiers(Qualifiers::Volatile); 547 } 548 549 void addFastQualifiers(unsigned TQs) { 550 assert(!(TQs & ~Qualifiers::FastMask) 551 && "non-fast qualifier bits set in mask!"); 552 Value.setInt(Value.getInt() | TQs); 553 } 554 555 void removeLocalConst(); 556 void removeLocalVolatile(); 557 void removeLocalRestrict(); 558 void removeLocalCVRQualifiers(unsigned Mask); 559 560 void removeLocalFastQualifiers() { Value.setInt(0); } 561 void removeLocalFastQualifiers(unsigned Mask) { 562 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 563 Value.setInt(Value.getInt() & ~Mask); 564 } 565 566 // Creates a type with the given qualifiers in addition to any 567 // qualifiers already on this type. 568 QualType withFastQualifiers(unsigned TQs) const { 569 QualType T = *this; 570 T.addFastQualifiers(TQs); 571 return T; 572 } 573 574 // Creates a type with exactly the given fast qualifiers, removing 575 // any existing fast qualifiers. 576 QualType withExactLocalFastQualifiers(unsigned TQs) const { 577 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 578 } 579 580 // Removes fast qualifiers, but leaves any extended qualifiers in place. 581 QualType withoutLocalFastQualifiers() const { 582 QualType T = *this; 583 T.removeLocalFastQualifiers(); 584 return T; 585 } 586 587 QualType getCanonicalType() const; 588 589 /// \brief Return this type with all of the instance-specific qualifiers 590 /// removed, but without removing any qualifiers that may have been applied 591 /// through typedefs. 592 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 593 594 /// \brief Retrieve the unqualified variant of the given type, 595 /// removing as little sugar as possible. 596 /// 597 /// This routine looks through various kinds of sugar to find the 598 /// least-desugared type that is unqualified. For example, given: 599 /// 600 /// \code 601 /// typedef int Integer; 602 /// typedef const Integer CInteger; 603 /// typedef CInteger DifferenceType; 604 /// \endcode 605 /// 606 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 607 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 608 /// 609 /// The resulting type might still be qualified if it's an array 610 /// type. To strip qualifiers even from within an array type, use 611 /// ASTContext::getUnqualifiedArrayType. 612 inline QualType getUnqualifiedType() const; 613 614 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 615 /// given type, removing as little sugar as possible. 616 /// 617 /// Like getUnqualifiedType(), but also returns the set of 618 /// qualifiers that were built up. 619 /// 620 /// The resulting type might still be qualified if it's an array 621 /// type. To strip qualifiers even from within an array type, use 622 /// ASTContext::getUnqualifiedArrayType. 623 inline SplitQualType getSplitUnqualifiedType() const; 624 625 /// \brief Determine whether this type is more qualified than the other 626 /// given type, requiring exact equality for non-CVR qualifiers. 627 bool isMoreQualifiedThan(QualType Other) const; 628 629 /// \brief Determine whether this type is at least as qualified as the other 630 /// given type, requiring exact equality for non-CVR qualifiers. 631 bool isAtLeastAsQualifiedAs(QualType Other) const; 632 633 QualType getNonReferenceType() const; 634 635 /// \brief Determine the type of a (typically non-lvalue) expression with the 636 /// specified result type. 637 /// 638 /// This routine should be used for expressions for which the return type is 639 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 640 /// an lvalue. It removes a top-level reference (since there are no 641 /// expressions of reference type) and deletes top-level cvr-qualifiers 642 /// from non-class types (in C++) or all types (in C). 643 QualType getNonLValueExprType(ASTContext &Context) const; 644 645 /// getDesugaredType - Return the specified type with any "sugar" removed from 646 /// the type. This takes off typedefs, typeof's etc. If the outer level of 647 /// the type is already concrete, it returns it unmodified. This is similar 648 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 649 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 650 /// concrete. 651 /// 652 /// Qualifiers are left in place. 653 QualType getDesugaredType(const ASTContext &Context) const { 654 return getDesugaredType(*this, Context); 655 } 656 657 SplitQualType getSplitDesugaredType() const { 658 return getSplitDesugaredType(*this); 659 } 660 661 /// IgnoreParens - Returns the specified type after dropping any 662 /// outer-level parentheses. 663 QualType IgnoreParens() const { 664 if (isa<ParenType>(*this)) 665 return QualType::IgnoreParens(*this); 666 return *this; 667 } 668 669 /// operator==/!= - Indicate whether the specified types and qualifiers are 670 /// identical. 671 friend bool operator==(const QualType &LHS, const QualType &RHS) { 672 return LHS.Value == RHS.Value; 673 } 674 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 675 return LHS.Value != RHS.Value; 676 } 677 std::string getAsString() const { 678 return getAsString(split()); 679 } 680 static std::string getAsString(SplitQualType split) { 681 return getAsString(split.first, split.second); 682 } 683 static std::string getAsString(const Type *ty, Qualifiers qs); 684 685 std::string getAsString(const PrintingPolicy &Policy) const { 686 std::string S; 687 getAsStringInternal(S, Policy); 688 return S; 689 } 690 void getAsStringInternal(std::string &Str, 691 const PrintingPolicy &Policy) const { 692 return getAsStringInternal(split(), Str, Policy); 693 } 694 static void getAsStringInternal(SplitQualType split, std::string &out, 695 const PrintingPolicy &policy) { 696 return getAsStringInternal(split.first, split.second, out, policy); 697 } 698 static void getAsStringInternal(const Type *ty, Qualifiers qs, 699 std::string &out, 700 const PrintingPolicy &policy); 701 702 void dump(const char *s) const; 703 void dump() const; 704 705 void Profile(llvm::FoldingSetNodeID &ID) const { 706 ID.AddPointer(getAsOpaquePtr()); 707 } 708 709 /// getAddressSpace - Return the address space of this type. 710 inline unsigned getAddressSpace() const; 711 712 /// GCAttrTypesAttr - Returns gc attribute of this type. 713 inline Qualifiers::GC getObjCGCAttr() const; 714 715 /// isObjCGCWeak true when Type is objc's weak. 716 bool isObjCGCWeak() const { 717 return getObjCGCAttr() == Qualifiers::Weak; 718 } 719 720 /// isObjCGCStrong true when Type is objc's strong. 721 bool isObjCGCStrong() const { 722 return getObjCGCAttr() == Qualifiers::Strong; 723 } 724 725 enum DestructionKind { 726 DK_none, 727 DK_cxx_destructor 728 }; 729 730 /// isDestructedType - nonzero if objects of this type require 731 /// non-trivial work to clean up after. Non-zero because it's 732 /// conceivable that qualifiers (objc_gc(weak)?) could make 733 /// something require destruction. 734 DestructionKind isDestructedType() const { 735 return isDestructedTypeImpl(*this); 736 } 737 738private: 739 // These methods are implemented in a separate translation unit; 740 // "static"-ize them to avoid creating temporary QualTypes in the 741 // caller. 742 static bool isConstant(QualType T, ASTContext& Ctx); 743 static QualType getDesugaredType(QualType T, const ASTContext &Context); 744 static SplitQualType getSplitDesugaredType(QualType T); 745 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 746 static QualType IgnoreParens(QualType T); 747 static DestructionKind isDestructedTypeImpl(QualType type); 748}; 749 750} // end clang. 751 752namespace llvm { 753/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 754/// to a specific Type class. 755template<> struct simplify_type<const ::clang::QualType> { 756 typedef const ::clang::Type *SimpleType; 757 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 758 return Val.getTypePtr(); 759 } 760}; 761template<> struct simplify_type< ::clang::QualType> 762 : public simplify_type<const ::clang::QualType> {}; 763 764// Teach SmallPtrSet that QualType is "basically a pointer". 765template<> 766class PointerLikeTypeTraits<clang::QualType> { 767public: 768 static inline void *getAsVoidPointer(clang::QualType P) { 769 return P.getAsOpaquePtr(); 770 } 771 static inline clang::QualType getFromVoidPointer(void *P) { 772 return clang::QualType::getFromOpaquePtr(P); 773 } 774 // Various qualifiers go in low bits. 775 enum { NumLowBitsAvailable = 0 }; 776}; 777 778} // end namespace llvm 779 780namespace clang { 781 782/// \brief Base class that is common to both the \c ExtQuals and \c Type 783/// classes, which allows \c QualType to access the common fields between the 784/// two. 785/// 786class ExtQualsTypeCommonBase { 787 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 788 : BaseType(baseType), CanonicalType(canon) {} 789 790 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 791 /// a self-referential pointer (for \c Type). 792 /// 793 /// This pointer allows an efficient mapping from a QualType to its 794 /// underlying type pointer. 795 const Type *const BaseType; 796 797 /// \brief The canonical type of this type. A QualType. 798 QualType CanonicalType; 799 800 friend class QualType; 801 friend class Type; 802 friend class ExtQuals; 803}; 804 805/// ExtQuals - We can encode up to four bits in the low bits of a 806/// type pointer, but there are many more type qualifiers that we want 807/// to be able to apply to an arbitrary type. Therefore we have this 808/// struct, intended to be heap-allocated and used by QualType to 809/// store qualifiers. 810/// 811/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 812/// in three low bits on the QualType pointer; a fourth bit records whether 813/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 814/// Objective-C GC attributes) are much more rare. 815class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 816 // NOTE: changing the fast qualifiers should be straightforward as 817 // long as you don't make 'const' non-fast. 818 // 1. Qualifiers: 819 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 820 // Fast qualifiers must occupy the low-order bits. 821 // b) Update Qualifiers::FastWidth and FastMask. 822 // 2. QualType: 823 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 824 // b) Update remove{Volatile,Restrict}, defined near the end of 825 // this header. 826 // 3. ASTContext: 827 // a) Update get{Volatile,Restrict}Type. 828 829 /// Quals - the immutable set of qualifiers applied by this 830 /// node; always contains extended qualifiers. 831 Qualifiers Quals; 832 833 ExtQuals *this_() { return this; } 834 835public: 836 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 837 : ExtQualsTypeCommonBase(baseType, 838 canon.isNull() ? QualType(this_(), 0) : canon), 839 Quals(quals) 840 { 841 assert(Quals.hasNonFastQualifiers() 842 && "ExtQuals created with no fast qualifiers"); 843 assert(!Quals.hasFastQualifiers() 844 && "ExtQuals created with fast qualifiers"); 845 } 846 847 Qualifiers getQualifiers() const { return Quals; } 848 849 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 850 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 851 852 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 853 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 854 855 const Type *getBaseType() const { return BaseType; } 856 857public: 858 void Profile(llvm::FoldingSetNodeID &ID) const { 859 Profile(ID, getBaseType(), Quals); 860 } 861 static void Profile(llvm::FoldingSetNodeID &ID, 862 const Type *BaseType, 863 Qualifiers Quals) { 864 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 865 ID.AddPointer(BaseType); 866 Quals.Profile(ID); 867 } 868}; 869 870/// \brief The kind of C++0x ref-qualifier associated with a function type, 871/// which determines whether a member function's "this" object can be an 872/// lvalue, rvalue, or neither. 873enum RefQualifierKind { 874 /// \brief No ref-qualifier was provided. 875 RQ_None = 0, 876 /// \brief An lvalue ref-qualifier was provided (\c &). 877 RQ_LValue, 878 /// \brief An rvalue ref-qualifier was provided (\c &&). 879 RQ_RValue 880}; 881 882/// Type - This is the base class of the type hierarchy. A central concept 883/// with types is that each type always has a canonical type. A canonical type 884/// is the type with any typedef names stripped out of it or the types it 885/// references. For example, consider: 886/// 887/// typedef int foo; 888/// typedef foo* bar; 889/// 'int *' 'foo *' 'bar' 890/// 891/// There will be a Type object created for 'int'. Since int is canonical, its 892/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 893/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 894/// there is a PointerType that represents 'int*', which, like 'int', is 895/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 896/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 897/// is also 'int*'. 898/// 899/// Non-canonical types are useful for emitting diagnostics, without losing 900/// information about typedefs being used. Canonical types are useful for type 901/// comparisons (they allow by-pointer equality tests) and useful for reasoning 902/// about whether something has a particular form (e.g. is a function type), 903/// because they implicitly, recursively, strip all typedefs out of a type. 904/// 905/// Types, once created, are immutable. 906/// 907class Type : public ExtQualsTypeCommonBase { 908public: 909 enum TypeClass { 910#define TYPE(Class, Base) Class, 911#define LAST_TYPE(Class) TypeLast = Class, 912#define ABSTRACT_TYPE(Class, Base) 913#include "clang/AST/TypeNodes.def" 914 TagFirst = Record, TagLast = Enum 915 }; 916 917private: 918 Type(const Type&); // DO NOT IMPLEMENT. 919 void operator=(const Type&); // DO NOT IMPLEMENT. 920 921 /// Bitfields required by the Type class. 922 class TypeBitfields { 923 friend class Type; 924 template <class T> friend class TypePropertyCache; 925 926 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 927 unsigned TC : 8; 928 929 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 930 /// Note that this should stay at the end of the ivars for Type so that 931 /// subclasses can pack their bitfields into the same word. 932 unsigned Dependent : 1; 933 934 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 935 unsigned VariablyModified : 1; 936 937 /// \brief Whether this type contains an unexpanded parameter pack 938 /// (for C++0x variadic templates). 939 unsigned ContainsUnexpandedParameterPack : 1; 940 941 /// \brief Nonzero if the cache (i.e. the bitfields here starting 942 /// with 'Cache') is valid. If so, then this is a 943 /// LangOptions::VisibilityMode+1. 944 mutable unsigned CacheValidAndVisibility : 2; 945 946 /// \brief Linkage of this type. 947 mutable unsigned CachedLinkage : 2; 948 949 /// \brief Whether this type involves and local or unnamed types. 950 mutable unsigned CachedLocalOrUnnamed : 1; 951 952 /// \brief FromAST - Whether this type comes from an AST file. 953 mutable unsigned FromAST : 1; 954 955 bool isCacheValid() const { 956 return (CacheValidAndVisibility != 0); 957 } 958 Visibility getVisibility() const { 959 assert(isCacheValid() && "getting linkage from invalid cache"); 960 return static_cast<Visibility>(CacheValidAndVisibility-1); 961 } 962 Linkage getLinkage() const { 963 assert(isCacheValid() && "getting linkage from invalid cache"); 964 return static_cast<Linkage>(CachedLinkage); 965 } 966 bool hasLocalOrUnnamedType() const { 967 assert(isCacheValid() && "getting linkage from invalid cache"); 968 return CachedLocalOrUnnamed; 969 } 970 }; 971 enum { NumTypeBits = 17 }; 972 973protected: 974 // These classes allow subclasses to somewhat cleanly pack bitfields 975 // into Type. 976 977 class ArrayTypeBitfields { 978 friend class ArrayType; 979 980 unsigned : NumTypeBits; 981 982 /// IndexTypeQuals - CVR qualifiers from declarations like 983 /// 'int X[static restrict 4]'. For function parameters only. 984 unsigned IndexTypeQuals : 3; 985 986 /// SizeModifier - storage class qualifiers from declarations like 987 /// 'int X[static restrict 4]'. For function parameters only. 988 /// Actually an ArrayType::ArraySizeModifier. 989 unsigned SizeModifier : 3; 990 }; 991 992 class BuiltinTypeBitfields { 993 friend class BuiltinType; 994 995 unsigned : NumTypeBits; 996 997 /// The kind (BuiltinType::Kind) of builtin type this is. 998 unsigned Kind : 8; 999 }; 1000 1001 class FunctionTypeBitfields { 1002 friend class FunctionType; 1003 1004 unsigned : NumTypeBits; 1005 1006 /// Extra information which affects how the function is called, like 1007 /// regparm and the calling convention. 1008 unsigned ExtInfo : 8; 1009 1010 /// Whether the function is variadic. Only used by FunctionProtoType. 1011 unsigned Variadic : 1; 1012 1013 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1014 /// other bitfields. 1015 /// The qualifiers are part of FunctionProtoType because... 1016 /// 1017 /// C++ 8.3.5p4: The return type, the parameter type list and the 1018 /// cv-qualifier-seq, [...], are part of the function type. 1019 unsigned TypeQuals : 3; 1020 1021 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1022 /// 1023 /// This is a value of type \c RefQualifierKind. 1024 unsigned RefQualifier : 2; 1025 }; 1026 1027 class ObjCObjectTypeBitfields { 1028 friend class ObjCObjectType; 1029 1030 unsigned : NumTypeBits; 1031 1032 /// NumProtocols - The number of protocols stored directly on this 1033 /// object type. 1034 unsigned NumProtocols : 32 - NumTypeBits; 1035 }; 1036 1037 class ReferenceTypeBitfields { 1038 friend class ReferenceType; 1039 1040 unsigned : NumTypeBits; 1041 1042 /// True if the type was originally spelled with an lvalue sigil. 1043 /// This is never true of rvalue references but can also be false 1044 /// on lvalue references because of C++0x [dcl.typedef]p9, 1045 /// as follows: 1046 /// 1047 /// typedef int &ref; // lvalue, spelled lvalue 1048 /// typedef int &&rvref; // rvalue 1049 /// ref &a; // lvalue, inner ref, spelled lvalue 1050 /// ref &&a; // lvalue, inner ref 1051 /// rvref &a; // lvalue, inner ref, spelled lvalue 1052 /// rvref &&a; // rvalue, inner ref 1053 unsigned SpelledAsLValue : 1; 1054 1055 /// True if the inner type is a reference type. This only happens 1056 /// in non-canonical forms. 1057 unsigned InnerRef : 1; 1058 }; 1059 1060 class TypeWithKeywordBitfields { 1061 friend class TypeWithKeyword; 1062 1063 unsigned : NumTypeBits; 1064 1065 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1066 unsigned Keyword : 8; 1067 }; 1068 1069 class VectorTypeBitfields { 1070 friend class VectorType; 1071 1072 unsigned : NumTypeBits; 1073 1074 /// VecKind - The kind of vector, either a generic vector type or some 1075 /// target-specific vector type such as for AltiVec or Neon. 1076 unsigned VecKind : 3; 1077 1078 /// NumElements - The number of elements in the vector. 1079 unsigned NumElements : 29 - NumTypeBits; 1080 }; 1081 1082 class AttributedTypeBitfields { 1083 friend class AttributedType; 1084 1085 unsigned : NumTypeBits; 1086 1087 /// AttrKind - an AttributedType::Kind 1088 unsigned AttrKind : 32 - NumTypeBits; 1089 }; 1090 1091 union { 1092 TypeBitfields TypeBits; 1093 ArrayTypeBitfields ArrayTypeBits; 1094 AttributedTypeBitfields AttributedTypeBits; 1095 BuiltinTypeBitfields BuiltinTypeBits; 1096 FunctionTypeBitfields FunctionTypeBits; 1097 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1098 ReferenceTypeBitfields ReferenceTypeBits; 1099 TypeWithKeywordBitfields TypeWithKeywordBits; 1100 VectorTypeBitfields VectorTypeBits; 1101 }; 1102 1103private: 1104 /// \brief Set whether this type comes from an AST file. 1105 void setFromAST(bool V = true) const { 1106 TypeBits.FromAST = V; 1107 } 1108 1109 template <class T> friend class TypePropertyCache; 1110 1111protected: 1112 // silence VC++ warning C4355: 'this' : used in base member initializer list 1113 Type *this_() { return this; } 1114 Type(TypeClass tc, QualType canon, bool Dependent, bool VariablyModified, 1115 bool ContainsUnexpandedParameterPack) 1116 : ExtQualsTypeCommonBase(this, 1117 canon.isNull() ? QualType(this_(), 0) : canon) { 1118 TypeBits.TC = tc; 1119 TypeBits.Dependent = Dependent; 1120 TypeBits.VariablyModified = VariablyModified; 1121 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1122 TypeBits.CacheValidAndVisibility = 0; 1123 TypeBits.CachedLocalOrUnnamed = false; 1124 TypeBits.CachedLinkage = NoLinkage; 1125 TypeBits.FromAST = false; 1126 } 1127 friend class ASTContext; 1128 1129 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1130 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1131 void setContainsUnexpandedParameterPack(bool PP = true) { 1132 TypeBits.ContainsUnexpandedParameterPack = PP; 1133 } 1134 1135public: 1136 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1137 1138 /// \brief Whether this type comes from an AST file. 1139 bool isFromAST() const { return TypeBits.FromAST; } 1140 1141 /// \brief Whether this type is or contains an unexpanded parameter 1142 /// pack, used to support C++0x variadic templates. 1143 /// 1144 /// A type that contains a parameter pack shall be expanded by the 1145 /// ellipsis operator at some point. For example, the typedef in the 1146 /// following example contains an unexpanded parameter pack 'T': 1147 /// 1148 /// \code 1149 /// template<typename ...T> 1150 /// struct X { 1151 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1152 /// }; 1153 /// \endcode 1154 /// 1155 /// Note that this routine does not specify which 1156 bool containsUnexpandedParameterPack() const { 1157 return TypeBits.ContainsUnexpandedParameterPack; 1158 } 1159 1160 /// Determines if this type would be canonical if it had no further 1161 /// qualification. 1162 bool isCanonicalUnqualified() const { 1163 return CanonicalType == QualType(this, 0); 1164 } 1165 1166 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1167 /// object types, function types, and incomplete types. 1168 1169 /// isIncompleteType - Return true if this is an incomplete type. 1170 /// A type that can describe objects, but which lacks information needed to 1171 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1172 /// routine will need to determine if the size is actually required. 1173 bool isIncompleteType() const; 1174 1175 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1176 /// type, in other words, not a function type. 1177 bool isIncompleteOrObjectType() const { 1178 return !isFunctionType(); 1179 } 1180 1181 /// \brief Determine whether this type is an object type. 1182 bool isObjectType() const { 1183 // C++ [basic.types]p8: 1184 // An object type is a (possibly cv-qualified) type that is not a 1185 // function type, not a reference type, and not a void type. 1186 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1187 } 1188 1189 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1190 bool isPODType() const; 1191 1192 /// isLiteralType - Return true if this is a literal type 1193 /// (C++0x [basic.types]p10) 1194 bool isLiteralType() const; 1195 1196 /// isTrivialType - Return true if this is a trivial type 1197 /// (C++0x [basic.types]p9) 1198 bool isTrivialType() const; 1199 1200 /// isTriviallyCopyableType - Return true if this is a trivially copyable type 1201 /// (C++0x [basic.types]p9 1202 bool isTriviallyCopyableType() const; 1203 1204 /// \brief Test if this type is a standard-layout type. 1205 /// (C++0x [basic.type]p9) 1206 bool isStandardLayoutType() const; 1207 1208 /// isCXX11PODType() - Return true if this is a POD type according to the 1209 /// more relaxed rules of the C++11 standard, regardless of the current 1210 /// compilation's language. 1211 /// (C++0x [basic.types]p9) 1212 bool isCXX11PODType() const; 1213 1214 /// Helper methods to distinguish type categories. All type predicates 1215 /// operate on the canonical type, ignoring typedefs and qualifiers. 1216 1217 /// isBuiltinType - returns true if the type is a builtin type. 1218 bool isBuiltinType() const; 1219 1220 /// isSpecificBuiltinType - Test for a particular builtin type. 1221 bool isSpecificBuiltinType(unsigned K) const; 1222 1223 /// isPlaceholderType - Test for a type which does not represent an 1224 /// actual type-system type but is instead used as a placeholder for 1225 /// various convenient purposes within Clang. All such types are 1226 /// BuiltinTypes. 1227 bool isPlaceholderType() const; 1228 1229 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1230 bool isSpecificPlaceholderType(unsigned K) const; 1231 1232 /// isIntegerType() does *not* include complex integers (a GCC extension). 1233 /// isComplexIntegerType() can be used to test for complex integers. 1234 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1235 bool isEnumeralType() const; 1236 bool isBooleanType() const; 1237 bool isCharType() const; 1238 bool isWideCharType() const; 1239 bool isAnyCharacterType() const; 1240 bool isIntegralType(ASTContext &Ctx) const; 1241 1242 /// \brief Determine whether this type is an integral or enumeration type. 1243 bool isIntegralOrEnumerationType() const; 1244 /// \brief Determine whether this type is an integral or unscoped enumeration 1245 /// type. 1246 bool isIntegralOrUnscopedEnumerationType() const; 1247 1248 /// Floating point categories. 1249 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1250 /// isComplexType() does *not* include complex integers (a GCC extension). 1251 /// isComplexIntegerType() can be used to test for complex integers. 1252 bool isComplexType() const; // C99 6.2.5p11 (complex) 1253 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1254 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1255 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1256 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1257 bool isVoidType() const; // C99 6.2.5p19 1258 bool isDerivedType() const; // C99 6.2.5p20 1259 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1260 bool isAggregateType() const; 1261 bool isFundamentalType() const; 1262 bool isCompoundType() const; 1263 1264 // Type Predicates: Check to see if this type is structurally the specified 1265 // type, ignoring typedefs and qualifiers. 1266 bool isFunctionType() const; 1267 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1268 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1269 bool isPointerType() const; 1270 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1271 bool isBlockPointerType() const; 1272 bool isVoidPointerType() const; 1273 bool isReferenceType() const; 1274 bool isLValueReferenceType() const; 1275 bool isRValueReferenceType() const; 1276 bool isFunctionPointerType() const; 1277 bool isMemberPointerType() const; 1278 bool isMemberFunctionPointerType() const; 1279 bool isMemberDataPointerType() const; 1280 bool isArrayType() const; 1281 bool isConstantArrayType() const; 1282 bool isIncompleteArrayType() const; 1283 bool isVariableArrayType() const; 1284 bool isDependentSizedArrayType() const; 1285 bool isRecordType() const; 1286 bool isClassType() const; 1287 bool isStructureType() const; 1288 bool isStructureOrClassType() const; 1289 bool isUnionType() const; 1290 bool isComplexIntegerType() const; // GCC _Complex integer type. 1291 bool isVectorType() const; // GCC vector type. 1292 bool isExtVectorType() const; // Extended vector type. 1293 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1294 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1295 // for the common case. 1296 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1297 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1298 bool isObjCQualifiedIdType() const; // id<foo> 1299 bool isObjCQualifiedClassType() const; // Class<foo> 1300 bool isObjCObjectOrInterfaceType() const; 1301 bool isObjCIdType() const; // id 1302 bool isObjCClassType() const; // Class 1303 bool isObjCSelType() const; // Class 1304 bool isObjCBuiltinType() const; // 'id' or 'Class' 1305 bool isTemplateTypeParmType() const; // C++ template type parameter 1306 bool isNullPtrType() const; // C++0x nullptr_t 1307 1308 enum ScalarTypeKind { 1309 STK_Pointer, 1310 STK_MemberPointer, 1311 STK_Bool, 1312 STK_Integral, 1313 STK_Floating, 1314 STK_IntegralComplex, 1315 STK_FloatingComplex 1316 }; 1317 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1318 ScalarTypeKind getScalarTypeKind() const; 1319 1320 /// isDependentType - Whether this type is a dependent type, meaning 1321 /// that its definition somehow depends on a template parameter 1322 /// (C++ [temp.dep.type]). 1323 bool isDependentType() const { return TypeBits.Dependent; } 1324 1325 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1326 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1327 1328 /// \brief Whether this type involves a variable-length array type 1329 /// with a definite size. 1330 bool hasSizedVLAType() const; 1331 1332 /// \brief Whether this type is or contains a local or unnamed type. 1333 bool hasUnnamedOrLocalType() const; 1334 1335 bool isOverloadableType() const; 1336 1337 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1338 bool isElaboratedTypeSpecifier() const; 1339 1340 /// hasPointerRepresentation - Whether this type is represented 1341 /// natively as a pointer; this includes pointers, references, block 1342 /// pointers, and Objective-C interface, qualified id, and qualified 1343 /// interface types, as well as nullptr_t. 1344 bool hasPointerRepresentation() const; 1345 1346 /// hasObjCPointerRepresentation - Whether this type can represent 1347 /// an objective pointer type for the purpose of GC'ability 1348 bool hasObjCPointerRepresentation() const; 1349 1350 /// \brief Determine whether this type has an integer representation 1351 /// of some sort, e.g., it is an integer type or a vector. 1352 bool hasIntegerRepresentation() const; 1353 1354 /// \brief Determine whether this type has an signed integer representation 1355 /// of some sort, e.g., it is an signed integer type or a vector. 1356 bool hasSignedIntegerRepresentation() const; 1357 1358 /// \brief Determine whether this type has an unsigned integer representation 1359 /// of some sort, e.g., it is an unsigned integer type or a vector. 1360 bool hasUnsignedIntegerRepresentation() const; 1361 1362 /// \brief Determine whether this type has a floating-point representation 1363 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1364 bool hasFloatingRepresentation() const; 1365 1366 // Type Checking Functions: Check to see if this type is structurally the 1367 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1368 // the best type we can. 1369 const RecordType *getAsStructureType() const; 1370 /// NOTE: getAs*ArrayType are methods on ASTContext. 1371 const RecordType *getAsUnionType() const; 1372 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1373 // The following is a convenience method that returns an ObjCObjectPointerType 1374 // for object declared using an interface. 1375 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1376 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1377 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1378 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1379 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1380 1381 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1382 /// because the type is a RecordType or because it is the injected-class-name 1383 /// type of a class template or class template partial specialization. 1384 CXXRecordDecl *getAsCXXRecordDecl() const; 1385 1386 /// \brief Get the AutoType whose type will be deduced for a variable with 1387 /// an initializer of this type. This looks through declarators like pointer 1388 /// types, but not through decltype or typedefs. 1389 AutoType *getContainedAutoType() const; 1390 1391 /// Member-template getAs<specific type>'. Look through sugar for 1392 /// an instance of <specific type>. This scheme will eventually 1393 /// replace the specific getAsXXXX methods above. 1394 /// 1395 /// There are some specializations of this member template listed 1396 /// immediately following this class. 1397 template <typename T> const T *getAs() const; 1398 1399 /// A variant of getAs<> for array types which silently discards 1400 /// qualifiers from the outermost type. 1401 const ArrayType *getAsArrayTypeUnsafe() const; 1402 1403 /// Member-template castAs<specific type>. Look through sugar for 1404 /// the underlying instance of <specific type>. 1405 /// 1406 /// This method has the same relationship to getAs<T> as cast<T> has 1407 /// to dyn_cast<T>; which is to say, the underlying type *must* 1408 /// have the intended type, and this method will never return null. 1409 template <typename T> const T *castAs() const; 1410 1411 /// A variant of castAs<> for array type which silently discards 1412 /// qualifiers from the outermost type. 1413 const ArrayType *castAsArrayTypeUnsafe() const; 1414 1415 /// getBaseElementTypeUnsafe - Get the base element type of this 1416 /// type, potentially discarding type qualifiers. This method 1417 /// should never be used when type qualifiers are meaningful. 1418 const Type *getBaseElementTypeUnsafe() const; 1419 1420 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1421 /// element type of the array, potentially with type qualifiers missing. 1422 /// This method should never be used when type qualifiers are meaningful. 1423 const Type *getArrayElementTypeNoTypeQual() const; 1424 1425 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1426 /// pointer, this returns the respective pointee. 1427 QualType getPointeeType() const; 1428 1429 /// getUnqualifiedDesugaredType() - Return the specified type with 1430 /// any "sugar" removed from the type, removing any typedefs, 1431 /// typeofs, etc., as well as any qualifiers. 1432 const Type *getUnqualifiedDesugaredType() const; 1433 1434 /// More type predicates useful for type checking/promotion 1435 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1436 1437 /// isSignedIntegerType - Return true if this is an integer type that is 1438 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1439 /// or an enum decl which has a signed representation. 1440 bool isSignedIntegerType() const; 1441 1442 /// isUnsignedIntegerType - Return true if this is an integer type that is 1443 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1444 /// or an enum decl which has an unsigned representation. 1445 bool isUnsignedIntegerType() const; 1446 1447 /// Determines whether this is an integer type that is signed or an 1448 /// enumeration types whose underlying type is a signed integer type. 1449 bool isSignedIntegerOrEnumerationType() const; 1450 1451 /// Determines whether this is an integer type that is unsigned or an 1452 /// enumeration types whose underlying type is a unsigned integer type. 1453 bool isUnsignedIntegerOrEnumerationType() const; 1454 1455 /// isConstantSizeType - Return true if this is not a variable sized type, 1456 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1457 /// incomplete types. 1458 bool isConstantSizeType() const; 1459 1460 /// isSpecifierType - Returns true if this type can be represented by some 1461 /// set of type specifiers. 1462 bool isSpecifierType() const; 1463 1464 /// \brief Determine the linkage of this type. 1465 Linkage getLinkage() const; 1466 1467 /// \brief Determine the visibility of this type. 1468 Visibility getVisibility() const; 1469 1470 /// \brief Determine the linkage and visibility of this type. 1471 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1472 1473 /// \brief Note that the linkage is no longer known. 1474 void ClearLinkageCache(); 1475 1476 const char *getTypeClassName() const; 1477 1478 QualType getCanonicalTypeInternal() const { 1479 return CanonicalType; 1480 } 1481 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1482 void dump() const; 1483 static bool classof(const Type *) { return true; } 1484 1485 friend class ASTReader; 1486 friend class ASTWriter; 1487}; 1488 1489template <> inline const TypedefType *Type::getAs() const { 1490 return dyn_cast<TypedefType>(this); 1491} 1492 1493// We can do canonical leaf types faster, because we don't have to 1494// worry about preserving child type decoration. 1495#define TYPE(Class, Base) 1496#define LEAF_TYPE(Class) \ 1497template <> inline const Class##Type *Type::getAs() const { \ 1498 return dyn_cast<Class##Type>(CanonicalType); \ 1499} \ 1500template <> inline const Class##Type *Type::castAs() const { \ 1501 return cast<Class##Type>(CanonicalType); \ 1502} 1503#include "clang/AST/TypeNodes.def" 1504 1505 1506/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1507/// types are always canonical and have a literal name field. 1508class BuiltinType : public Type { 1509public: 1510 enum Kind { 1511 Void, 1512 1513 Bool, // This is bool and/or _Bool. 1514 Char_U, // This is 'char' for targets where char is unsigned. 1515 UChar, // This is explicitly qualified unsigned char. 1516 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1517 Char16, // This is 'char16_t' for C++. 1518 Char32, // This is 'char32_t' for C++. 1519 UShort, 1520 UInt, 1521 ULong, 1522 ULongLong, 1523 UInt128, // __uint128_t 1524 1525 Char_S, // This is 'char' for targets where char is signed. 1526 SChar, // This is explicitly qualified signed char. 1527 WChar_S, // This is 'wchar_t' for C++, when signed. 1528 Short, 1529 Int, 1530 Long, 1531 LongLong, 1532 Int128, // __int128_t 1533 1534 Float, Double, LongDouble, 1535 1536 NullPtr, // This is the type of C++0x 'nullptr'. 1537 1538 /// The primitive Objective C 'id' type. The user-visible 'id' 1539 /// type is a typedef of an ObjCObjectPointerType to an 1540 /// ObjCObjectType with this as its base. In fact, this only ever 1541 /// shows up in an AST as the base type of an ObjCObjectType. 1542 ObjCId, 1543 1544 /// The primitive Objective C 'Class' type. The user-visible 1545 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1546 /// ObjCObjectType with this as its base. In fact, this only ever 1547 /// shows up in an AST as the base type of an ObjCObjectType. 1548 ObjCClass, 1549 1550 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1551 /// type is a typedef of a PointerType to this. 1552 ObjCSel, 1553 1554 /// This represents the type of an expression whose type is 1555 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1556 /// appear in situations where the structure of the type is 1557 /// theoretically deducible. 1558 Dependent, 1559 1560 /// The type of an unresolved overload set. A placeholder type. 1561 /// Expressions with this type have one of the following basic 1562 /// forms, with parentheses generally permitted: 1563 /// foo # possibly qualified, not if an implicit access 1564 /// foo # possibly qualified, not if an implicit access 1565 /// &foo # possibly qualified, not if an implicit access 1566 /// x->foo # only if might be a static member function 1567 /// &x->foo # only if might be a static member function 1568 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1569 /// OverloadExpr::find can be used to analyze the expression. 1570 Overload, 1571 1572 /// The type of a bound C++ non-static member function. 1573 /// A placeholder type. Expressions with this type have one of the 1574 /// following basic forms: 1575 /// foo # if an implicit access 1576 /// x->foo # if only contains non-static members 1577 BoundMember, 1578 1579 /// __builtin_any_type. A placeholder type. Useful for clients 1580 /// like debuggers that don't know what type to give something. 1581 /// Only a small number of operations are valid on expressions of 1582 /// unknown type, most notably explicit casts. 1583 UnknownAny 1584 }; 1585 1586public: 1587 BuiltinType(Kind K) 1588 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1589 /*VariablyModified=*/false, 1590 /*Unexpanded paramter pack=*/false) { 1591 BuiltinTypeBits.Kind = K; 1592 } 1593 1594 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1595 const char *getName(const LangOptions &LO) const; 1596 1597 bool isSugared() const { return false; } 1598 QualType desugar() const { return QualType(this, 0); } 1599 1600 bool isInteger() const { 1601 return getKind() >= Bool && getKind() <= Int128; 1602 } 1603 1604 bool isSignedInteger() const { 1605 return getKind() >= Char_S && getKind() <= Int128; 1606 } 1607 1608 bool isUnsignedInteger() const { 1609 return getKind() >= Bool && getKind() <= UInt128; 1610 } 1611 1612 bool isFloatingPoint() const { 1613 return getKind() >= Float && getKind() <= LongDouble; 1614 } 1615 1616 /// Determines whether this type is a placeholder type, i.e. a type 1617 /// which cannot appear in arbitrary positions in a fully-formed 1618 /// expression. 1619 bool isPlaceholderType() const { 1620 return getKind() >= Overload; 1621 } 1622 1623 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1624 static bool classof(const BuiltinType *) { return true; } 1625}; 1626 1627/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1628/// types (_Complex float etc) as well as the GCC integer complex extensions. 1629/// 1630class ComplexType : public Type, public llvm::FoldingSetNode { 1631 QualType ElementType; 1632 ComplexType(QualType Element, QualType CanonicalPtr) : 1633 Type(Complex, CanonicalPtr, Element->isDependentType(), 1634 Element->isVariablyModifiedType(), 1635 Element->containsUnexpandedParameterPack()), 1636 ElementType(Element) { 1637 } 1638 friend class ASTContext; // ASTContext creates these. 1639 1640public: 1641 QualType getElementType() const { return ElementType; } 1642 1643 bool isSugared() const { return false; } 1644 QualType desugar() const { return QualType(this, 0); } 1645 1646 void Profile(llvm::FoldingSetNodeID &ID) { 1647 Profile(ID, getElementType()); 1648 } 1649 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1650 ID.AddPointer(Element.getAsOpaquePtr()); 1651 } 1652 1653 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1654 static bool classof(const ComplexType *) { return true; } 1655}; 1656 1657/// ParenType - Sugar for parentheses used when specifying types. 1658/// 1659class ParenType : public Type, public llvm::FoldingSetNode { 1660 QualType Inner; 1661 1662 ParenType(QualType InnerType, QualType CanonType) : 1663 Type(Paren, CanonType, InnerType->isDependentType(), 1664 InnerType->isVariablyModifiedType(), 1665 InnerType->containsUnexpandedParameterPack()), 1666 Inner(InnerType) { 1667 } 1668 friend class ASTContext; // ASTContext creates these. 1669 1670public: 1671 1672 QualType getInnerType() const { return Inner; } 1673 1674 bool isSugared() const { return true; } 1675 QualType desugar() const { return getInnerType(); } 1676 1677 void Profile(llvm::FoldingSetNodeID &ID) { 1678 Profile(ID, getInnerType()); 1679 } 1680 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1681 Inner.Profile(ID); 1682 } 1683 1684 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1685 static bool classof(const ParenType *) { return true; } 1686}; 1687 1688/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1689/// 1690class PointerType : public Type, public llvm::FoldingSetNode { 1691 QualType PointeeType; 1692 1693 PointerType(QualType Pointee, QualType CanonicalPtr) : 1694 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1695 Pointee->isVariablyModifiedType(), 1696 Pointee->containsUnexpandedParameterPack()), 1697 PointeeType(Pointee) { 1698 } 1699 friend class ASTContext; // ASTContext creates these. 1700 1701public: 1702 1703 QualType getPointeeType() const { return PointeeType; } 1704 1705 bool isSugared() const { return false; } 1706 QualType desugar() const { return QualType(this, 0); } 1707 1708 void Profile(llvm::FoldingSetNodeID &ID) { 1709 Profile(ID, getPointeeType()); 1710 } 1711 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1712 ID.AddPointer(Pointee.getAsOpaquePtr()); 1713 } 1714 1715 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1716 static bool classof(const PointerType *) { return true; } 1717}; 1718 1719/// BlockPointerType - pointer to a block type. 1720/// This type is to represent types syntactically represented as 1721/// "void (^)(int)", etc. Pointee is required to always be a function type. 1722/// 1723class BlockPointerType : public Type, public llvm::FoldingSetNode { 1724 QualType PointeeType; // Block is some kind of pointer type 1725 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1726 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1727 Pointee->isVariablyModifiedType(), 1728 Pointee->containsUnexpandedParameterPack()), 1729 PointeeType(Pointee) { 1730 } 1731 friend class ASTContext; // ASTContext creates these. 1732 1733public: 1734 1735 // Get the pointee type. Pointee is required to always be a function type. 1736 QualType getPointeeType() const { return PointeeType; } 1737 1738 bool isSugared() const { return false; } 1739 QualType desugar() const { return QualType(this, 0); } 1740 1741 void Profile(llvm::FoldingSetNodeID &ID) { 1742 Profile(ID, getPointeeType()); 1743 } 1744 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1745 ID.AddPointer(Pointee.getAsOpaquePtr()); 1746 } 1747 1748 static bool classof(const Type *T) { 1749 return T->getTypeClass() == BlockPointer; 1750 } 1751 static bool classof(const BlockPointerType *) { return true; } 1752}; 1753 1754/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1755/// 1756class ReferenceType : public Type, public llvm::FoldingSetNode { 1757 QualType PointeeType; 1758 1759protected: 1760 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1761 bool SpelledAsLValue) : 1762 Type(tc, CanonicalRef, Referencee->isDependentType(), 1763 Referencee->isVariablyModifiedType(), 1764 Referencee->containsUnexpandedParameterPack()), 1765 PointeeType(Referencee) 1766 { 1767 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1768 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1769 } 1770 1771public: 1772 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1773 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1774 1775 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1776 QualType getPointeeType() const { 1777 // FIXME: this might strip inner qualifiers; okay? 1778 const ReferenceType *T = this; 1779 while (T->isInnerRef()) 1780 T = T->PointeeType->castAs<ReferenceType>(); 1781 return T->PointeeType; 1782 } 1783 1784 void Profile(llvm::FoldingSetNodeID &ID) { 1785 Profile(ID, PointeeType, isSpelledAsLValue()); 1786 } 1787 static void Profile(llvm::FoldingSetNodeID &ID, 1788 QualType Referencee, 1789 bool SpelledAsLValue) { 1790 ID.AddPointer(Referencee.getAsOpaquePtr()); 1791 ID.AddBoolean(SpelledAsLValue); 1792 } 1793 1794 static bool classof(const Type *T) { 1795 return T->getTypeClass() == LValueReference || 1796 T->getTypeClass() == RValueReference; 1797 } 1798 static bool classof(const ReferenceType *) { return true; } 1799}; 1800 1801/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1802/// 1803class LValueReferenceType : public ReferenceType { 1804 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1805 bool SpelledAsLValue) : 1806 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1807 {} 1808 friend class ASTContext; // ASTContext creates these 1809public: 1810 bool isSugared() const { return false; } 1811 QualType desugar() const { return QualType(this, 0); } 1812 1813 static bool classof(const Type *T) { 1814 return T->getTypeClass() == LValueReference; 1815 } 1816 static bool classof(const LValueReferenceType *) { return true; } 1817}; 1818 1819/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1820/// 1821class RValueReferenceType : public ReferenceType { 1822 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1823 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1824 } 1825 friend class ASTContext; // ASTContext creates these 1826public: 1827 bool isSugared() const { return false; } 1828 QualType desugar() const { return QualType(this, 0); } 1829 1830 static bool classof(const Type *T) { 1831 return T->getTypeClass() == RValueReference; 1832 } 1833 static bool classof(const RValueReferenceType *) { return true; } 1834}; 1835 1836/// MemberPointerType - C++ 8.3.3 - Pointers to members 1837/// 1838class MemberPointerType : public Type, public llvm::FoldingSetNode { 1839 QualType PointeeType; 1840 /// The class of which the pointee is a member. Must ultimately be a 1841 /// RecordType, but could be a typedef or a template parameter too. 1842 const Type *Class; 1843 1844 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1845 Type(MemberPointer, CanonicalPtr, 1846 Cls->isDependentType() || Pointee->isDependentType(), 1847 Pointee->isVariablyModifiedType(), 1848 (Cls->containsUnexpandedParameterPack() || 1849 Pointee->containsUnexpandedParameterPack())), 1850 PointeeType(Pointee), Class(Cls) { 1851 } 1852 friend class ASTContext; // ASTContext creates these. 1853 1854public: 1855 QualType getPointeeType() const { return PointeeType; } 1856 1857 /// Returns true if the member type (i.e. the pointee type) is a 1858 /// function type rather than a data-member type. 1859 bool isMemberFunctionPointer() const { 1860 return PointeeType->isFunctionProtoType(); 1861 } 1862 1863 /// Returns true if the member type (i.e. the pointee type) is a 1864 /// data type rather than a function type. 1865 bool isMemberDataPointer() const { 1866 return !PointeeType->isFunctionProtoType(); 1867 } 1868 1869 const Type *getClass() const { return Class; } 1870 1871 bool isSugared() const { return false; } 1872 QualType desugar() const { return QualType(this, 0); } 1873 1874 void Profile(llvm::FoldingSetNodeID &ID) { 1875 Profile(ID, getPointeeType(), getClass()); 1876 } 1877 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1878 const Type *Class) { 1879 ID.AddPointer(Pointee.getAsOpaquePtr()); 1880 ID.AddPointer(Class); 1881 } 1882 1883 static bool classof(const Type *T) { 1884 return T->getTypeClass() == MemberPointer; 1885 } 1886 static bool classof(const MemberPointerType *) { return true; } 1887}; 1888 1889/// ArrayType - C99 6.7.5.2 - Array Declarators. 1890/// 1891class ArrayType : public Type, public llvm::FoldingSetNode { 1892public: 1893 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1894 /// an array with a static size (e.g. int X[static 4]), or an array 1895 /// with a star size (e.g. int X[*]). 1896 /// 'static' is only allowed on function parameters. 1897 enum ArraySizeModifier { 1898 Normal, Static, Star 1899 }; 1900private: 1901 /// ElementType - The element type of the array. 1902 QualType ElementType; 1903 1904protected: 1905 // C++ [temp.dep.type]p1: 1906 // A type is dependent if it is... 1907 // - an array type constructed from any dependent type or whose 1908 // size is specified by a constant expression that is 1909 // value-dependent, 1910 ArrayType(TypeClass tc, QualType et, QualType can, 1911 ArraySizeModifier sm, unsigned tq, 1912 bool ContainsUnexpandedParameterPack) 1913 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1914 (tc == VariableArray || et->isVariablyModifiedType()), 1915 ContainsUnexpandedParameterPack), 1916 ElementType(et) { 1917 ArrayTypeBits.IndexTypeQuals = tq; 1918 ArrayTypeBits.SizeModifier = sm; 1919 } 1920 1921 friend class ASTContext; // ASTContext creates these. 1922 1923public: 1924 QualType getElementType() const { return ElementType; } 1925 ArraySizeModifier getSizeModifier() const { 1926 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1927 } 1928 Qualifiers getIndexTypeQualifiers() const { 1929 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1930 } 1931 unsigned getIndexTypeCVRQualifiers() const { 1932 return ArrayTypeBits.IndexTypeQuals; 1933 } 1934 1935 static bool classof(const Type *T) { 1936 return T->getTypeClass() == ConstantArray || 1937 T->getTypeClass() == VariableArray || 1938 T->getTypeClass() == IncompleteArray || 1939 T->getTypeClass() == DependentSizedArray; 1940 } 1941 static bool classof(const ArrayType *) { return true; } 1942}; 1943 1944/// ConstantArrayType - This class represents the canonical version of 1945/// C arrays with a specified constant size. For example, the canonical 1946/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1947/// type is 'int' and the size is 404. 1948class ConstantArrayType : public ArrayType { 1949 llvm::APInt Size; // Allows us to unique the type. 1950 1951 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1952 ArraySizeModifier sm, unsigned tq) 1953 : ArrayType(ConstantArray, et, can, sm, tq, 1954 et->containsUnexpandedParameterPack()), 1955 Size(size) {} 1956protected: 1957 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1958 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1959 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 1960 Size(size) {} 1961 friend class ASTContext; // ASTContext creates these. 1962public: 1963 const llvm::APInt &getSize() const { return Size; } 1964 bool isSugared() const { return false; } 1965 QualType desugar() const { return QualType(this, 0); } 1966 1967 1968 /// \brief Determine the number of bits required to address a member of 1969 // an array with the given element type and number of elements. 1970 static unsigned getNumAddressingBits(ASTContext &Context, 1971 QualType ElementType, 1972 const llvm::APInt &NumElements); 1973 1974 /// \brief Determine the maximum number of active bits that an array's size 1975 /// can require, which limits the maximum size of the array. 1976 static unsigned getMaxSizeBits(ASTContext &Context); 1977 1978 void Profile(llvm::FoldingSetNodeID &ID) { 1979 Profile(ID, getElementType(), getSize(), 1980 getSizeModifier(), getIndexTypeCVRQualifiers()); 1981 } 1982 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1983 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1984 unsigned TypeQuals) { 1985 ID.AddPointer(ET.getAsOpaquePtr()); 1986 ID.AddInteger(ArraySize.getZExtValue()); 1987 ID.AddInteger(SizeMod); 1988 ID.AddInteger(TypeQuals); 1989 } 1990 static bool classof(const Type *T) { 1991 return T->getTypeClass() == ConstantArray; 1992 } 1993 static bool classof(const ConstantArrayType *) { return true; } 1994}; 1995 1996/// IncompleteArrayType - This class represents C arrays with an unspecified 1997/// size. For example 'int A[]' has an IncompleteArrayType where the element 1998/// type is 'int' and the size is unspecified. 1999class IncompleteArrayType : public ArrayType { 2000 2001 IncompleteArrayType(QualType et, QualType can, 2002 ArraySizeModifier sm, unsigned tq) 2003 : ArrayType(IncompleteArray, et, can, sm, tq, 2004 et->containsUnexpandedParameterPack()) {} 2005 friend class ASTContext; // ASTContext creates these. 2006public: 2007 bool isSugared() const { return false; } 2008 QualType desugar() const { return QualType(this, 0); } 2009 2010 static bool classof(const Type *T) { 2011 return T->getTypeClass() == IncompleteArray; 2012 } 2013 static bool classof(const IncompleteArrayType *) { return true; } 2014 2015 friend class StmtIteratorBase; 2016 2017 void Profile(llvm::FoldingSetNodeID &ID) { 2018 Profile(ID, getElementType(), getSizeModifier(), 2019 getIndexTypeCVRQualifiers()); 2020 } 2021 2022 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2023 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2024 ID.AddPointer(ET.getAsOpaquePtr()); 2025 ID.AddInteger(SizeMod); 2026 ID.AddInteger(TypeQuals); 2027 } 2028}; 2029 2030/// VariableArrayType - This class represents C arrays with a specified size 2031/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2032/// Since the size expression is an arbitrary expression, we store it as such. 2033/// 2034/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2035/// should not be: two lexically equivalent variable array types could mean 2036/// different things, for example, these variables do not have the same type 2037/// dynamically: 2038/// 2039/// void foo(int x) { 2040/// int Y[x]; 2041/// ++x; 2042/// int Z[x]; 2043/// } 2044/// 2045class VariableArrayType : public ArrayType { 2046 /// SizeExpr - An assignment expression. VLA's are only permitted within 2047 /// a function block. 2048 Stmt *SizeExpr; 2049 /// Brackets - The left and right array brackets. 2050 SourceRange Brackets; 2051 2052 VariableArrayType(QualType et, QualType can, Expr *e, 2053 ArraySizeModifier sm, unsigned tq, 2054 SourceRange brackets) 2055 : ArrayType(VariableArray, et, can, sm, tq, 2056 et->containsUnexpandedParameterPack()), 2057 SizeExpr((Stmt*) e), Brackets(brackets) {} 2058 friend class ASTContext; // ASTContext creates these. 2059 2060public: 2061 Expr *getSizeExpr() const { 2062 // We use C-style casts instead of cast<> here because we do not wish 2063 // to have a dependency of Type.h on Stmt.h/Expr.h. 2064 return (Expr*) SizeExpr; 2065 } 2066 SourceRange getBracketsRange() const { return Brackets; } 2067 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2068 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2069 2070 bool isSugared() const { return false; } 2071 QualType desugar() const { return QualType(this, 0); } 2072 2073 static bool classof(const Type *T) { 2074 return T->getTypeClass() == VariableArray; 2075 } 2076 static bool classof(const VariableArrayType *) { return true; } 2077 2078 friend class StmtIteratorBase; 2079 2080 void Profile(llvm::FoldingSetNodeID &ID) { 2081 assert(0 && "Cannot unique VariableArrayTypes."); 2082 } 2083}; 2084 2085/// DependentSizedArrayType - This type represents an array type in 2086/// C++ whose size is a value-dependent expression. For example: 2087/// 2088/// \code 2089/// template<typename T, int Size> 2090/// class array { 2091/// T data[Size]; 2092/// }; 2093/// \endcode 2094/// 2095/// For these types, we won't actually know what the array bound is 2096/// until template instantiation occurs, at which point this will 2097/// become either a ConstantArrayType or a VariableArrayType. 2098class DependentSizedArrayType : public ArrayType { 2099 const ASTContext &Context; 2100 2101 /// \brief An assignment expression that will instantiate to the 2102 /// size of the array. 2103 /// 2104 /// The expression itself might be NULL, in which case the array 2105 /// type will have its size deduced from an initializer. 2106 Stmt *SizeExpr; 2107 2108 /// Brackets - The left and right array brackets. 2109 SourceRange Brackets; 2110 2111 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2112 Expr *e, ArraySizeModifier sm, unsigned tq, 2113 SourceRange brackets); 2114 2115 friend class ASTContext; // ASTContext creates these. 2116 2117public: 2118 Expr *getSizeExpr() const { 2119 // We use C-style casts instead of cast<> here because we do not wish 2120 // to have a dependency of Type.h on Stmt.h/Expr.h. 2121 return (Expr*) SizeExpr; 2122 } 2123 SourceRange getBracketsRange() const { return Brackets; } 2124 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2125 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2126 2127 bool isSugared() const { return false; } 2128 QualType desugar() const { return QualType(this, 0); } 2129 2130 static bool classof(const Type *T) { 2131 return T->getTypeClass() == DependentSizedArray; 2132 } 2133 static bool classof(const DependentSizedArrayType *) { return true; } 2134 2135 friend class StmtIteratorBase; 2136 2137 2138 void Profile(llvm::FoldingSetNodeID &ID) { 2139 Profile(ID, Context, getElementType(), 2140 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2141 } 2142 2143 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2144 QualType ET, ArraySizeModifier SizeMod, 2145 unsigned TypeQuals, Expr *E); 2146}; 2147 2148/// DependentSizedExtVectorType - This type represent an extended vector type 2149/// where either the type or size is dependent. For example: 2150/// @code 2151/// template<typename T, int Size> 2152/// class vector { 2153/// typedef T __attribute__((ext_vector_type(Size))) type; 2154/// } 2155/// @endcode 2156class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2157 const ASTContext &Context; 2158 Expr *SizeExpr; 2159 /// ElementType - The element type of the array. 2160 QualType ElementType; 2161 SourceLocation loc; 2162 2163 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2164 QualType can, Expr *SizeExpr, SourceLocation loc); 2165 2166 friend class ASTContext; 2167 2168public: 2169 Expr *getSizeExpr() const { return SizeExpr; } 2170 QualType getElementType() const { return ElementType; } 2171 SourceLocation getAttributeLoc() const { return loc; } 2172 2173 bool isSugared() const { return false; } 2174 QualType desugar() const { return QualType(this, 0); } 2175 2176 static bool classof(const Type *T) { 2177 return T->getTypeClass() == DependentSizedExtVector; 2178 } 2179 static bool classof(const DependentSizedExtVectorType *) { return true; } 2180 2181 void Profile(llvm::FoldingSetNodeID &ID) { 2182 Profile(ID, Context, getElementType(), getSizeExpr()); 2183 } 2184 2185 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2186 QualType ElementType, Expr *SizeExpr); 2187}; 2188 2189 2190/// VectorType - GCC generic vector type. This type is created using 2191/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2192/// bytes; or from an Altivec __vector or vector declaration. 2193/// Since the constructor takes the number of vector elements, the 2194/// client is responsible for converting the size into the number of elements. 2195class VectorType : public Type, public llvm::FoldingSetNode { 2196public: 2197 enum VectorKind { 2198 GenericVector, // not a target-specific vector type 2199 AltiVecVector, // is AltiVec vector 2200 AltiVecPixel, // is AltiVec 'vector Pixel' 2201 AltiVecBool, // is AltiVec 'vector bool ...' 2202 NeonVector, // is ARM Neon vector 2203 NeonPolyVector // is ARM Neon polynomial vector 2204 }; 2205protected: 2206 /// ElementType - The element type of the vector. 2207 QualType ElementType; 2208 2209 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2210 VectorKind vecKind); 2211 2212 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2213 QualType canonType, VectorKind vecKind); 2214 2215 friend class ASTContext; // ASTContext creates these. 2216 2217public: 2218 2219 QualType getElementType() const { return ElementType; } 2220 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2221 2222 bool isSugared() const { return false; } 2223 QualType desugar() const { return QualType(this, 0); } 2224 2225 VectorKind getVectorKind() const { 2226 return VectorKind(VectorTypeBits.VecKind); 2227 } 2228 2229 void Profile(llvm::FoldingSetNodeID &ID) { 2230 Profile(ID, getElementType(), getNumElements(), 2231 getTypeClass(), getVectorKind()); 2232 } 2233 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2234 unsigned NumElements, TypeClass TypeClass, 2235 VectorKind VecKind) { 2236 ID.AddPointer(ElementType.getAsOpaquePtr()); 2237 ID.AddInteger(NumElements); 2238 ID.AddInteger(TypeClass); 2239 ID.AddInteger(VecKind); 2240 } 2241 2242 static bool classof(const Type *T) { 2243 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2244 } 2245 static bool classof(const VectorType *) { return true; } 2246}; 2247 2248/// ExtVectorType - Extended vector type. This type is created using 2249/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2250/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2251/// class enables syntactic extensions, like Vector Components for accessing 2252/// points, colors, and textures (modeled after OpenGL Shading Language). 2253class ExtVectorType : public VectorType { 2254 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2255 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2256 friend class ASTContext; // ASTContext creates these. 2257public: 2258 static int getPointAccessorIdx(char c) { 2259 switch (c) { 2260 default: return -1; 2261 case 'x': return 0; 2262 case 'y': return 1; 2263 case 'z': return 2; 2264 case 'w': return 3; 2265 } 2266 } 2267 static int getNumericAccessorIdx(char c) { 2268 switch (c) { 2269 default: return -1; 2270 case '0': return 0; 2271 case '1': return 1; 2272 case '2': return 2; 2273 case '3': return 3; 2274 case '4': return 4; 2275 case '5': return 5; 2276 case '6': return 6; 2277 case '7': return 7; 2278 case '8': return 8; 2279 case '9': return 9; 2280 case 'A': 2281 case 'a': return 10; 2282 case 'B': 2283 case 'b': return 11; 2284 case 'C': 2285 case 'c': return 12; 2286 case 'D': 2287 case 'd': return 13; 2288 case 'E': 2289 case 'e': return 14; 2290 case 'F': 2291 case 'f': return 15; 2292 } 2293 } 2294 2295 static int getAccessorIdx(char c) { 2296 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2297 return getNumericAccessorIdx(c); 2298 } 2299 2300 bool isAccessorWithinNumElements(char c) const { 2301 if (int idx = getAccessorIdx(c)+1) 2302 return unsigned(idx-1) < getNumElements(); 2303 return false; 2304 } 2305 bool isSugared() const { return false; } 2306 QualType desugar() const { return QualType(this, 0); } 2307 2308 static bool classof(const Type *T) { 2309 return T->getTypeClass() == ExtVector; 2310 } 2311 static bool classof(const ExtVectorType *) { return true; } 2312}; 2313 2314/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2315/// class of FunctionNoProtoType and FunctionProtoType. 2316/// 2317class FunctionType : public Type { 2318 // The type returned by the function. 2319 QualType ResultType; 2320 2321 public: 2322 /// ExtInfo - A class which abstracts out some details necessary for 2323 /// making a call. 2324 /// 2325 /// It is not actually used directly for storing this information in 2326 /// a FunctionType, although FunctionType does currently use the 2327 /// same bit-pattern. 2328 /// 2329 // If you add a field (say Foo), other than the obvious places (both, 2330 // constructors, compile failures), what you need to update is 2331 // * Operator== 2332 // * getFoo 2333 // * withFoo 2334 // * functionType. Add Foo, getFoo. 2335 // * ASTContext::getFooType 2336 // * ASTContext::mergeFunctionTypes 2337 // * FunctionNoProtoType::Profile 2338 // * FunctionProtoType::Profile 2339 // * TypePrinter::PrintFunctionProto 2340 // * AST read and write 2341 // * Codegen 2342 class ExtInfo { 2343 // Feel free to rearrange or add bits, but if you go over 8, 2344 // you'll need to adjust both the Bits field below and 2345 // Type::FunctionTypeBitfields. 2346 2347 // | CC |noreturn|hasregparm|regparm 2348 // |0 .. 2| 3 | 4 |5 .. 7 2349 enum { CallConvMask = 0x7 }; 2350 enum { NoReturnMask = 0x8 }; 2351 enum { HasRegParmMask = 0x10 }; 2352 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2353 RegParmOffset = 5 }; 2354 2355 unsigned char Bits; 2356 2357 ExtInfo(unsigned Bits) : Bits(static_cast<unsigned char>(Bits)) {} 2358 2359 friend class FunctionType; 2360 2361 public: 2362 // Constructor with no defaults. Use this when you know that you 2363 // have all the elements (when reading an AST file for example). 2364 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc) { 2365 Bits = ((unsigned) cc) | 2366 (noReturn ? NoReturnMask : 0) | 2367 (hasRegParm ? HasRegParmMask : 0) | 2368 (regParm << RegParmOffset); 2369 } 2370 2371 // Constructor with all defaults. Use when for example creating a 2372 // function know to use defaults. 2373 ExtInfo() : Bits(0) {} 2374 2375 bool getNoReturn() const { return Bits & NoReturnMask; } 2376 bool getHasRegParm() const { return Bits & HasRegParmMask; } 2377 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2378 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2379 2380 bool operator==(ExtInfo Other) const { 2381 return Bits == Other.Bits; 2382 } 2383 bool operator!=(ExtInfo Other) const { 2384 return Bits != Other.Bits; 2385 } 2386 2387 // Note that we don't have setters. That is by design, use 2388 // the following with methods instead of mutating these objects. 2389 2390 ExtInfo withNoReturn(bool noReturn) const { 2391 if (noReturn) 2392 return ExtInfo(Bits | NoReturnMask); 2393 else 2394 return ExtInfo(Bits & ~NoReturnMask); 2395 } 2396 2397 ExtInfo withRegParm(unsigned RegParm) const { 2398 return ExtInfo(HasRegParmMask | (Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2399 } 2400 2401 ExtInfo withCallingConv(CallingConv cc) const { 2402 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2403 } 2404 2405 void Profile(llvm::FoldingSetNodeID &ID) const { 2406 ID.AddInteger(Bits); 2407 } 2408 }; 2409 2410protected: 2411 FunctionType(TypeClass tc, QualType res, bool variadic, 2412 unsigned typeQuals, RefQualifierKind RefQualifier, 2413 QualType Canonical, bool Dependent, 2414 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2415 ExtInfo Info) 2416 : Type(tc, Canonical, Dependent, VariablyModified, 2417 ContainsUnexpandedParameterPack), 2418 ResultType(res) { 2419 FunctionTypeBits.ExtInfo = Info.Bits; 2420 FunctionTypeBits.Variadic = variadic; 2421 FunctionTypeBits.TypeQuals = typeQuals; 2422 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2423 } 2424 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2425 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2426 2427 RefQualifierKind getRefQualifier() const { 2428 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2429 } 2430 2431public: 2432 2433 QualType getResultType() const { return ResultType; } 2434 2435 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2436 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2437 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2438 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2439 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2440 2441 /// \brief Determine the type of an expression that calls a function of 2442 /// this type. 2443 QualType getCallResultType(ASTContext &Context) const { 2444 return getResultType().getNonLValueExprType(Context); 2445 } 2446 2447 static llvm::StringRef getNameForCallConv(CallingConv CC); 2448 2449 static bool classof(const Type *T) { 2450 return T->getTypeClass() == FunctionNoProto || 2451 T->getTypeClass() == FunctionProto; 2452 } 2453 static bool classof(const FunctionType *) { return true; } 2454}; 2455 2456/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2457/// no information available about its arguments. 2458class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2459 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2460 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2461 /*Dependent=*/false, Result->isVariablyModifiedType(), 2462 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2463 2464 friend class ASTContext; // ASTContext creates these. 2465 2466public: 2467 // No additional state past what FunctionType provides. 2468 2469 bool isSugared() const { return false; } 2470 QualType desugar() const { return QualType(this, 0); } 2471 2472 void Profile(llvm::FoldingSetNodeID &ID) { 2473 Profile(ID, getResultType(), getExtInfo()); 2474 } 2475 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2476 ExtInfo Info) { 2477 Info.Profile(ID); 2478 ID.AddPointer(ResultType.getAsOpaquePtr()); 2479 } 2480 2481 static bool classof(const Type *T) { 2482 return T->getTypeClass() == FunctionNoProto; 2483 } 2484 static bool classof(const FunctionNoProtoType *) { return true; } 2485}; 2486 2487/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2488/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2489/// arguments, not as having a single void argument. Such a type can have an 2490/// exception specification, but this specification is not part of the canonical 2491/// type. 2492class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2493public: 2494 /// ExtProtoInfo - Extra information about a function prototype. 2495 struct ExtProtoInfo { 2496 ExtProtoInfo() : 2497 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2498 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0) {} 2499 2500 FunctionType::ExtInfo ExtInfo; 2501 bool Variadic; 2502 ExceptionSpecificationType ExceptionSpecType; 2503 unsigned char TypeQuals; 2504 RefQualifierKind RefQualifier; 2505 unsigned NumExceptions; 2506 const QualType *Exceptions; 2507 Expr *NoexceptExpr; 2508 }; 2509 2510private: 2511 /// \brief Determine whether there are any argument types that 2512 /// contain an unexpanded parameter pack. 2513 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2514 unsigned numArgs) { 2515 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2516 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2517 return true; 2518 2519 return false; 2520 } 2521 2522 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2523 QualType canonical, const ExtProtoInfo &epi); 2524 2525 /// NumArgs - The number of arguments this function has, not counting '...'. 2526 unsigned NumArgs : 20; 2527 2528 /// NumExceptions - The number of types in the exception spec, if any. 2529 unsigned NumExceptions : 9; 2530 2531 /// ExceptionSpecType - The type of exception specification this function has. 2532 unsigned ExceptionSpecType : 3; 2533 2534 /// ArgInfo - There is an variable size array after the class in memory that 2535 /// holds the argument types. 2536 2537 /// Exceptions - There is another variable size array after ArgInfo that 2538 /// holds the exception types. 2539 2540 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2541 /// to the expression in the noexcept() specifier. 2542 2543 friend class ASTContext; // ASTContext creates these. 2544 2545public: 2546 unsigned getNumArgs() const { return NumArgs; } 2547 QualType getArgType(unsigned i) const { 2548 assert(i < NumArgs && "Invalid argument number!"); 2549 return arg_type_begin()[i]; 2550 } 2551 2552 ExtProtoInfo getExtProtoInfo() const { 2553 ExtProtoInfo EPI; 2554 EPI.ExtInfo = getExtInfo(); 2555 EPI.Variadic = isVariadic(); 2556 EPI.ExceptionSpecType = getExceptionSpecType(); 2557 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2558 EPI.RefQualifier = getRefQualifier(); 2559 if (EPI.ExceptionSpecType == EST_Dynamic) { 2560 EPI.NumExceptions = NumExceptions; 2561 EPI.Exceptions = exception_begin(); 2562 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2563 EPI.NoexceptExpr = getNoexceptExpr(); 2564 } 2565 return EPI; 2566 } 2567 2568 /// \brief Get the kind of exception specification on this function. 2569 ExceptionSpecificationType getExceptionSpecType() const { 2570 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2571 } 2572 /// \brief Return whether this function has any kind of exception spec. 2573 bool hasExceptionSpec() const { 2574 return getExceptionSpecType() != EST_None; 2575 } 2576 /// \brief Return whether this function has a dynamic (throw) exception spec. 2577 bool hasDynamicExceptionSpec() const { 2578 return isDynamicExceptionSpec(getExceptionSpecType()); 2579 } 2580 /// \brief Return whether this function has a noexcept exception spec. 2581 bool hasNoexceptExceptionSpec() const { 2582 return isNoexceptExceptionSpec(getExceptionSpecType()); 2583 } 2584 /// \brief Result type of getNoexceptSpec(). 2585 enum NoexceptResult { 2586 NR_NoNoexcept, ///< There is no noexcept specifier. 2587 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2588 NR_Dependent, ///< The noexcept specifier is dependent. 2589 NR_Throw, ///< The noexcept specifier evaluates to false. 2590 NR_Nothrow ///< The noexcept specifier evaluates to true. 2591 }; 2592 /// \brief Get the meaning of the noexcept spec on this function, if any. 2593 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2594 unsigned getNumExceptions() const { return NumExceptions; } 2595 QualType getExceptionType(unsigned i) const { 2596 assert(i < NumExceptions && "Invalid exception number!"); 2597 return exception_begin()[i]; 2598 } 2599 Expr *getNoexceptExpr() const { 2600 if (getExceptionSpecType() != EST_ComputedNoexcept) 2601 return 0; 2602 // NoexceptExpr sits where the arguments end. 2603 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2604 } 2605 bool isNothrow(ASTContext &Ctx) const { 2606 ExceptionSpecificationType EST = getExceptionSpecType(); 2607 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2608 return true; 2609 if (EST != EST_ComputedNoexcept) 2610 return false; 2611 return getNoexceptSpec(Ctx) == NR_Nothrow; 2612 } 2613 2614 using FunctionType::isVariadic; 2615 2616 /// \brief Determines whether this function prototype contains a 2617 /// parameter pack at the end. 2618 /// 2619 /// A function template whose last parameter is a parameter pack can be 2620 /// called with an arbitrary number of arguments, much like a variadic 2621 /// function. However, 2622 bool isTemplateVariadic() const; 2623 2624 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2625 2626 2627 /// \brief Retrieve the ref-qualifier associated with this function type. 2628 RefQualifierKind getRefQualifier() const { 2629 return FunctionType::getRefQualifier(); 2630 } 2631 2632 typedef const QualType *arg_type_iterator; 2633 arg_type_iterator arg_type_begin() const { 2634 return reinterpret_cast<const QualType *>(this+1); 2635 } 2636 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2637 2638 typedef const QualType *exception_iterator; 2639 exception_iterator exception_begin() const { 2640 // exceptions begin where arguments end 2641 return arg_type_end(); 2642 } 2643 exception_iterator exception_end() const { 2644 if (getExceptionSpecType() != EST_Dynamic) 2645 return exception_begin(); 2646 return exception_begin() + NumExceptions; 2647 } 2648 2649 bool isSugared() const { return false; } 2650 QualType desugar() const { return QualType(this, 0); } 2651 2652 static bool classof(const Type *T) { 2653 return T->getTypeClass() == FunctionProto; 2654 } 2655 static bool classof(const FunctionProtoType *) { return true; } 2656 2657 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2658 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2659 arg_type_iterator ArgTys, unsigned NumArgs, 2660 const ExtProtoInfo &EPI, const ASTContext &Context); 2661}; 2662 2663 2664/// \brief Represents the dependent type named by a dependently-scoped 2665/// typename using declaration, e.g. 2666/// using typename Base<T>::foo; 2667/// Template instantiation turns these into the underlying type. 2668class UnresolvedUsingType : public Type { 2669 UnresolvedUsingTypenameDecl *Decl; 2670 2671 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2672 : Type(UnresolvedUsing, QualType(), true, false, 2673 /*ContainsUnexpandedParameterPack=*/false), 2674 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2675 friend class ASTContext; // ASTContext creates these. 2676public: 2677 2678 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2679 2680 bool isSugared() const { return false; } 2681 QualType desugar() const { return QualType(this, 0); } 2682 2683 static bool classof(const Type *T) { 2684 return T->getTypeClass() == UnresolvedUsing; 2685 } 2686 static bool classof(const UnresolvedUsingType *) { return true; } 2687 2688 void Profile(llvm::FoldingSetNodeID &ID) { 2689 return Profile(ID, Decl); 2690 } 2691 static void Profile(llvm::FoldingSetNodeID &ID, 2692 UnresolvedUsingTypenameDecl *D) { 2693 ID.AddPointer(D); 2694 } 2695}; 2696 2697 2698class TypedefType : public Type { 2699 TypedefNameDecl *Decl; 2700protected: 2701 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2702 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType(), 2703 /*ContainsUnexpandedParameterPack=*/false), 2704 Decl(const_cast<TypedefNameDecl*>(D)) { 2705 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2706 } 2707 friend class ASTContext; // ASTContext creates these. 2708public: 2709 2710 TypedefNameDecl *getDecl() const { return Decl; } 2711 2712 bool isSugared() const { return true; } 2713 QualType desugar() const; 2714 2715 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2716 static bool classof(const TypedefType *) { return true; } 2717}; 2718 2719/// TypeOfExprType (GCC extension). 2720class TypeOfExprType : public Type { 2721 Expr *TOExpr; 2722 2723protected: 2724 TypeOfExprType(Expr *E, QualType can = QualType()); 2725 friend class ASTContext; // ASTContext creates these. 2726public: 2727 Expr *getUnderlyingExpr() const { return TOExpr; } 2728 2729 /// \brief Remove a single level of sugar. 2730 QualType desugar() const; 2731 2732 /// \brief Returns whether this type directly provides sugar. 2733 bool isSugared() const { return true; } 2734 2735 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2736 static bool classof(const TypeOfExprType *) { return true; } 2737}; 2738 2739/// \brief Internal representation of canonical, dependent 2740/// typeof(expr) types. 2741/// 2742/// This class is used internally by the ASTContext to manage 2743/// canonical, dependent types, only. Clients will only see instances 2744/// of this class via TypeOfExprType nodes. 2745class DependentTypeOfExprType 2746 : public TypeOfExprType, public llvm::FoldingSetNode { 2747 const ASTContext &Context; 2748 2749public: 2750 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2751 : TypeOfExprType(E), Context(Context) { } 2752 2753 bool isSugared() const { return false; } 2754 QualType desugar() const { return QualType(this, 0); } 2755 2756 void Profile(llvm::FoldingSetNodeID &ID) { 2757 Profile(ID, Context, getUnderlyingExpr()); 2758 } 2759 2760 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2761 Expr *E); 2762}; 2763 2764/// TypeOfType (GCC extension). 2765class TypeOfType : public Type { 2766 QualType TOType; 2767 TypeOfType(QualType T, QualType can) 2768 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType(), 2769 T->containsUnexpandedParameterPack()), 2770 TOType(T) { 2771 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2772 } 2773 friend class ASTContext; // ASTContext creates these. 2774public: 2775 QualType getUnderlyingType() const { return TOType; } 2776 2777 /// \brief Remove a single level of sugar. 2778 QualType desugar() const { return getUnderlyingType(); } 2779 2780 /// \brief Returns whether this type directly provides sugar. 2781 bool isSugared() const { return true; } 2782 2783 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2784 static bool classof(const TypeOfType *) { return true; } 2785}; 2786 2787/// DecltypeType (C++0x) 2788class DecltypeType : public Type { 2789 Expr *E; 2790 2791 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2792 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2793 // from it. 2794 QualType UnderlyingType; 2795 2796protected: 2797 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2798 friend class ASTContext; // ASTContext creates these. 2799public: 2800 Expr *getUnderlyingExpr() const { return E; } 2801 QualType getUnderlyingType() const { return UnderlyingType; } 2802 2803 /// \brief Remove a single level of sugar. 2804 QualType desugar() const { return getUnderlyingType(); } 2805 2806 /// \brief Returns whether this type directly provides sugar. 2807 bool isSugared() const { return !isDependentType(); } 2808 2809 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2810 static bool classof(const DecltypeType *) { return true; } 2811}; 2812 2813/// \brief Internal representation of canonical, dependent 2814/// decltype(expr) types. 2815/// 2816/// This class is used internally by the ASTContext to manage 2817/// canonical, dependent types, only. Clients will only see instances 2818/// of this class via DecltypeType nodes. 2819class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2820 const ASTContext &Context; 2821 2822public: 2823 DependentDecltypeType(const ASTContext &Context, Expr *E); 2824 2825 bool isSugared() const { return false; } 2826 QualType desugar() const { return QualType(this, 0); } 2827 2828 void Profile(llvm::FoldingSetNodeID &ID) { 2829 Profile(ID, Context, getUnderlyingExpr()); 2830 } 2831 2832 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2833 Expr *E); 2834}; 2835 2836/// \brief A unary type transform, which is a type constructed from another 2837class UnaryTransformType : public Type { 2838public: 2839 enum UTTKind { 2840 EnumUnderlyingType 2841 }; 2842 2843private: 2844 /// The untransformed type. 2845 QualType BaseType; 2846 /// The transformed type if not dependent, otherwise the same as BaseType. 2847 QualType UnderlyingType; 2848 2849 UTTKind UKind; 2850protected: 2851 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 2852 QualType CanonicalTy); 2853 friend class ASTContext; 2854public: 2855 bool isSugared() const { return !isDependentType(); } 2856 QualType desugar() const { return UnderlyingType; } 2857 2858 QualType getUnderlyingType() const { return UnderlyingType; } 2859 QualType getBaseType() const { return BaseType; } 2860 2861 UTTKind getUTTKind() const { return UKind; } 2862 2863 static bool classof(const Type *T) { 2864 return T->getTypeClass() == UnaryTransform; 2865 } 2866 static bool classof(const UnaryTransformType *) { return true; } 2867}; 2868 2869class TagType : public Type { 2870 /// Stores the TagDecl associated with this type. The decl may point to any 2871 /// TagDecl that declares the entity. 2872 TagDecl * decl; 2873 2874protected: 2875 TagType(TypeClass TC, const TagDecl *D, QualType can); 2876 2877public: 2878 TagDecl *getDecl() const; 2879 2880 /// @brief Determines whether this type is in the process of being 2881 /// defined. 2882 bool isBeingDefined() const; 2883 2884 static bool classof(const Type *T) { 2885 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2886 } 2887 static bool classof(const TagType *) { return true; } 2888 static bool classof(const RecordType *) { return true; } 2889 static bool classof(const EnumType *) { return true; } 2890}; 2891 2892/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2893/// to detect TagType objects of structs/unions/classes. 2894class RecordType : public TagType { 2895protected: 2896 explicit RecordType(const RecordDecl *D) 2897 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2898 explicit RecordType(TypeClass TC, RecordDecl *D) 2899 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2900 friend class ASTContext; // ASTContext creates these. 2901public: 2902 2903 RecordDecl *getDecl() const { 2904 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2905 } 2906 2907 // FIXME: This predicate is a helper to QualType/Type. It needs to 2908 // recursively check all fields for const-ness. If any field is declared 2909 // const, it needs to return false. 2910 bool hasConstFields() const { return false; } 2911 2912 bool isSugared() const { return false; } 2913 QualType desugar() const { return QualType(this, 0); } 2914 2915 static bool classof(const TagType *T); 2916 static bool classof(const Type *T) { 2917 return isa<TagType>(T) && classof(cast<TagType>(T)); 2918 } 2919 static bool classof(const RecordType *) { return true; } 2920}; 2921 2922/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2923/// to detect TagType objects of enums. 2924class EnumType : public TagType { 2925 explicit EnumType(const EnumDecl *D) 2926 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2927 friend class ASTContext; // ASTContext creates these. 2928public: 2929 2930 EnumDecl *getDecl() const { 2931 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2932 } 2933 2934 bool isSugared() const { return false; } 2935 QualType desugar() const { return QualType(this, 0); } 2936 2937 static bool classof(const TagType *T); 2938 static bool classof(const Type *T) { 2939 return isa<TagType>(T) && classof(cast<TagType>(T)); 2940 } 2941 static bool classof(const EnumType *) { return true; } 2942}; 2943 2944/// AttributedType - An attributed type is a type to which a type 2945/// attribute has been applied. The "modified type" is the 2946/// fully-sugared type to which the attributed type was applied; 2947/// generally it is not canonically equivalent to the attributed type. 2948/// The "equivalent type" is the minimally-desugared type which the 2949/// type is canonically equivalent to. 2950/// 2951/// For example, in the following attributed type: 2952/// int32_t __attribute__((vector_size(16))) 2953/// - the modified type is the TypedefType for int32_t 2954/// - the equivalent type is VectorType(16, int32_t) 2955/// - the canonical type is VectorType(16, int) 2956class AttributedType : public Type, public llvm::FoldingSetNode { 2957public: 2958 // It is really silly to have yet another attribute-kind enum, but 2959 // clang::attr::Kind doesn't currently cover the pure type attrs. 2960 enum Kind { 2961 // Expression operand. 2962 attr_address_space, 2963 attr_regparm, 2964 attr_vector_size, 2965 attr_neon_vector_type, 2966 attr_neon_polyvector_type, 2967 2968 FirstExprOperandKind = attr_address_space, 2969 LastExprOperandKind = attr_neon_polyvector_type, 2970 2971 // Enumerated operand (string or keyword). 2972 attr_objc_gc, 2973 attr_pcs, 2974 2975 FirstEnumOperandKind = attr_objc_gc, 2976 LastEnumOperandKind = attr_pcs, 2977 2978 // No operand. 2979 attr_noreturn, 2980 attr_cdecl, 2981 attr_fastcall, 2982 attr_stdcall, 2983 attr_thiscall, 2984 attr_pascal 2985 }; 2986 2987private: 2988 QualType ModifiedType; 2989 QualType EquivalentType; 2990 2991 friend class ASTContext; // creates these 2992 2993 AttributedType(QualType canon, Kind attrKind, 2994 QualType modified, QualType equivalent) 2995 : Type(Attributed, canon, canon->isDependentType(), 2996 canon->isVariablyModifiedType(), 2997 canon->containsUnexpandedParameterPack()), 2998 ModifiedType(modified), EquivalentType(equivalent) { 2999 AttributedTypeBits.AttrKind = attrKind; 3000 } 3001 3002public: 3003 Kind getAttrKind() const { 3004 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3005 } 3006 3007 QualType getModifiedType() const { return ModifiedType; } 3008 QualType getEquivalentType() const { return EquivalentType; } 3009 3010 bool isSugared() const { return true; } 3011 QualType desugar() const { return getEquivalentType(); } 3012 3013 void Profile(llvm::FoldingSetNodeID &ID) { 3014 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3015 } 3016 3017 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3018 QualType modified, QualType equivalent) { 3019 ID.AddInteger(attrKind); 3020 ID.AddPointer(modified.getAsOpaquePtr()); 3021 ID.AddPointer(equivalent.getAsOpaquePtr()); 3022 } 3023 3024 static bool classof(const Type *T) { 3025 return T->getTypeClass() == Attributed; 3026 } 3027 static bool classof(const AttributedType *T) { return true; } 3028}; 3029 3030class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3031 // Helper data collector for canonical types. 3032 struct CanonicalTTPTInfo { 3033 unsigned Depth : 15; 3034 unsigned ParameterPack : 1; 3035 unsigned Index : 16; 3036 }; 3037 3038 union { 3039 // Info for the canonical type. 3040 CanonicalTTPTInfo CanTTPTInfo; 3041 // Info for the non-canonical type. 3042 TemplateTypeParmDecl *TTPDecl; 3043 }; 3044 3045 /// Build a non-canonical type. 3046 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3047 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3048 /*VariablyModified=*/false, 3049 Canon->containsUnexpandedParameterPack()), 3050 TTPDecl(TTPDecl) { } 3051 3052 /// Build the canonical type. 3053 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3054 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 3055 /*VariablyModified=*/false, PP) { 3056 CanTTPTInfo.Depth = D; 3057 CanTTPTInfo.Index = I; 3058 CanTTPTInfo.ParameterPack = PP; 3059 } 3060 3061 friend class ASTContext; // ASTContext creates these 3062 3063 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3064 QualType Can = getCanonicalTypeInternal(); 3065 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3066 } 3067 3068public: 3069 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3070 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3071 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3072 3073 TemplateTypeParmDecl *getDecl() const { 3074 return isCanonicalUnqualified() ? 0 : TTPDecl; 3075 } 3076 3077 IdentifierInfo *getIdentifier() const; 3078 3079 bool isSugared() const { return false; } 3080 QualType desugar() const { return QualType(this, 0); } 3081 3082 void Profile(llvm::FoldingSetNodeID &ID) { 3083 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3084 } 3085 3086 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3087 unsigned Index, bool ParameterPack, 3088 TemplateTypeParmDecl *TTPDecl) { 3089 ID.AddInteger(Depth); 3090 ID.AddInteger(Index); 3091 ID.AddBoolean(ParameterPack); 3092 ID.AddPointer(TTPDecl); 3093 } 3094 3095 static bool classof(const Type *T) { 3096 return T->getTypeClass() == TemplateTypeParm; 3097 } 3098 static bool classof(const TemplateTypeParmType *T) { return true; } 3099}; 3100 3101/// \brief Represents the result of substituting a type for a template 3102/// type parameter. 3103/// 3104/// Within an instantiated template, all template type parameters have 3105/// been replaced with these. They are used solely to record that a 3106/// type was originally written as a template type parameter; 3107/// therefore they are never canonical. 3108class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3109 // The original type parameter. 3110 const TemplateTypeParmType *Replaced; 3111 3112 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3113 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3114 Canon->isVariablyModifiedType(), 3115 Canon->containsUnexpandedParameterPack()), 3116 Replaced(Param) { } 3117 3118 friend class ASTContext; 3119 3120public: 3121 /// Gets the template parameter that was substituted for. 3122 const TemplateTypeParmType *getReplacedParameter() const { 3123 return Replaced; 3124 } 3125 3126 /// Gets the type that was substituted for the template 3127 /// parameter. 3128 QualType getReplacementType() const { 3129 return getCanonicalTypeInternal(); 3130 } 3131 3132 bool isSugared() const { return true; } 3133 QualType desugar() const { return getReplacementType(); } 3134 3135 void Profile(llvm::FoldingSetNodeID &ID) { 3136 Profile(ID, getReplacedParameter(), getReplacementType()); 3137 } 3138 static void Profile(llvm::FoldingSetNodeID &ID, 3139 const TemplateTypeParmType *Replaced, 3140 QualType Replacement) { 3141 ID.AddPointer(Replaced); 3142 ID.AddPointer(Replacement.getAsOpaquePtr()); 3143 } 3144 3145 static bool classof(const Type *T) { 3146 return T->getTypeClass() == SubstTemplateTypeParm; 3147 } 3148 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3149}; 3150 3151/// \brief Represents the result of substituting a set of types for a template 3152/// type parameter pack. 3153/// 3154/// When a pack expansion in the source code contains multiple parameter packs 3155/// and those parameter packs correspond to different levels of template 3156/// parameter lists, this type node is used to represent a template type 3157/// parameter pack from an outer level, which has already had its argument pack 3158/// substituted but that still lives within a pack expansion that itself 3159/// could not be instantiated. When actually performing a substitution into 3160/// that pack expansion (e.g., when all template parameters have corresponding 3161/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3162/// at the current pack substitution index. 3163class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3164 /// \brief The original type parameter. 3165 const TemplateTypeParmType *Replaced; 3166 3167 /// \brief A pointer to the set of template arguments that this 3168 /// parameter pack is instantiated with. 3169 const TemplateArgument *Arguments; 3170 3171 /// \brief The number of template arguments in \c Arguments. 3172 unsigned NumArguments; 3173 3174 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3175 QualType Canon, 3176 const TemplateArgument &ArgPack); 3177 3178 friend class ASTContext; 3179 3180public: 3181 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3182 3183 /// Gets the template parameter that was substituted for. 3184 const TemplateTypeParmType *getReplacedParameter() const { 3185 return Replaced; 3186 } 3187 3188 bool isSugared() const { return false; } 3189 QualType desugar() const { return QualType(this, 0); } 3190 3191 TemplateArgument getArgumentPack() const; 3192 3193 void Profile(llvm::FoldingSetNodeID &ID); 3194 static void Profile(llvm::FoldingSetNodeID &ID, 3195 const TemplateTypeParmType *Replaced, 3196 const TemplateArgument &ArgPack); 3197 3198 static bool classof(const Type *T) { 3199 return T->getTypeClass() == SubstTemplateTypeParmPack; 3200 } 3201 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3202}; 3203 3204/// \brief Represents a C++0x auto type. 3205/// 3206/// These types are usually a placeholder for a deduced type. However, within 3207/// templates and before the initializer is attached, there is no deduced type 3208/// and an auto type is type-dependent and canonical. 3209class AutoType : public Type, public llvm::FoldingSetNode { 3210 AutoType(QualType DeducedType) 3211 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3212 /*Dependent=*/DeducedType.isNull(), 3213 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3214 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3215 "deduced a dependent type for auto"); 3216 } 3217 3218 friend class ASTContext; // ASTContext creates these 3219 3220public: 3221 bool isSugared() const { return isDeduced(); } 3222 QualType desugar() const { return getCanonicalTypeInternal(); } 3223 3224 QualType getDeducedType() const { 3225 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3226 } 3227 bool isDeduced() const { 3228 return !isDependentType(); 3229 } 3230 3231 void Profile(llvm::FoldingSetNodeID &ID) { 3232 Profile(ID, getDeducedType()); 3233 } 3234 3235 static void Profile(llvm::FoldingSetNodeID &ID, 3236 QualType Deduced) { 3237 ID.AddPointer(Deduced.getAsOpaquePtr()); 3238 } 3239 3240 static bool classof(const Type *T) { 3241 return T->getTypeClass() == Auto; 3242 } 3243 static bool classof(const AutoType *T) { return true; } 3244}; 3245 3246/// \brief Represents the type of a template specialization as written 3247/// in the source code. 3248/// 3249/// Template specialization types represent the syntactic form of a 3250/// template-id that refers to a type, e.g., @c vector<int>. Some 3251/// template specialization types are syntactic sugar, whose canonical 3252/// type will point to some other type node that represents the 3253/// instantiation or class template specialization. For example, a 3254/// class template specialization type of @c vector<int> will refer to 3255/// a tag type for the instantiation 3256/// @c std::vector<int, std::allocator<int>>. 3257/// 3258/// Other template specialization types, for which the template name 3259/// is dependent, may be canonical types. These types are always 3260/// dependent. 3261/// 3262/// An instance of this type is followed by an array of TemplateArgument*s, 3263/// then, if the template specialization type is for a type alias template, 3264/// a QualType representing the non-canonical aliased type. 3265class TemplateSpecializationType 3266 : public Type, public llvm::FoldingSetNode { 3267 /// \brief The name of the template being specialized. 3268 TemplateName Template; 3269 3270 /// \brief - The number of template arguments named in this class 3271 /// template specialization. 3272 unsigned NumArgs; 3273 3274 TemplateSpecializationType(TemplateName T, 3275 const TemplateArgument *Args, 3276 unsigned NumArgs, QualType Canon, 3277 QualType Aliased); 3278 3279 friend class ASTContext; // ASTContext creates these 3280 3281public: 3282 /// \brief Determine whether any of the given template arguments are 3283 /// dependent. 3284 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3285 unsigned NumArgs); 3286 3287 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3288 unsigned NumArgs); 3289 3290 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 3291 3292 /// \brief Print a template argument list, including the '<' and '>' 3293 /// enclosing the template arguments. 3294 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3295 unsigned NumArgs, 3296 const PrintingPolicy &Policy, 3297 bool SkipBrackets = false); 3298 3299 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3300 unsigned NumArgs, 3301 const PrintingPolicy &Policy); 3302 3303 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3304 const PrintingPolicy &Policy); 3305 3306 /// True if this template specialization type matches a current 3307 /// instantiation in the context in which it is found. 3308 bool isCurrentInstantiation() const { 3309 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3310 } 3311 3312 /// True if this template specialization type is for a type alias 3313 /// template. 3314 bool isTypeAlias() const; 3315 /// Get the aliased type, if this is a specialization of a type alias 3316 /// template. 3317 QualType getAliasedType() const { 3318 assert(isTypeAlias() && "not a type alias template specialization"); 3319 return *reinterpret_cast<const QualType*>(end()); 3320 } 3321 3322 typedef const TemplateArgument * iterator; 3323 3324 iterator begin() const { return getArgs(); } 3325 iterator end() const; // defined inline in TemplateBase.h 3326 3327 /// \brief Retrieve the name of the template that we are specializing. 3328 TemplateName getTemplateName() const { return Template; } 3329 3330 /// \brief Retrieve the template arguments. 3331 const TemplateArgument *getArgs() const { 3332 return reinterpret_cast<const TemplateArgument *>(this + 1); 3333 } 3334 3335 /// \brief Retrieve the number of template arguments. 3336 unsigned getNumArgs() const { return NumArgs; } 3337 3338 /// \brief Retrieve a specific template argument as a type. 3339 /// \precondition @c isArgType(Arg) 3340 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3341 3342 bool isSugared() const { 3343 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3344 } 3345 QualType desugar() const { return getCanonicalTypeInternal(); } 3346 3347 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3348 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3349 if (isTypeAlias()) 3350 getAliasedType().Profile(ID); 3351 } 3352 3353 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3354 const TemplateArgument *Args, 3355 unsigned NumArgs, 3356 const ASTContext &Context); 3357 3358 static bool classof(const Type *T) { 3359 return T->getTypeClass() == TemplateSpecialization; 3360 } 3361 static bool classof(const TemplateSpecializationType *T) { return true; } 3362}; 3363 3364/// \brief The injected class name of a C++ class template or class 3365/// template partial specialization. Used to record that a type was 3366/// spelled with a bare identifier rather than as a template-id; the 3367/// equivalent for non-templated classes is just RecordType. 3368/// 3369/// Injected class name types are always dependent. Template 3370/// instantiation turns these into RecordTypes. 3371/// 3372/// Injected class name types are always canonical. This works 3373/// because it is impossible to compare an injected class name type 3374/// with the corresponding non-injected template type, for the same 3375/// reason that it is impossible to directly compare template 3376/// parameters from different dependent contexts: injected class name 3377/// types can only occur within the scope of a particular templated 3378/// declaration, and within that scope every template specialization 3379/// will canonicalize to the injected class name (when appropriate 3380/// according to the rules of the language). 3381class InjectedClassNameType : public Type { 3382 CXXRecordDecl *Decl; 3383 3384 /// The template specialization which this type represents. 3385 /// For example, in 3386 /// template <class T> class A { ... }; 3387 /// this is A<T>, whereas in 3388 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3389 /// this is A<B<X,Y> >. 3390 /// 3391 /// It is always unqualified, always a template specialization type, 3392 /// and always dependent. 3393 QualType InjectedType; 3394 3395 friend class ASTContext; // ASTContext creates these. 3396 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3397 // currently suitable for AST reading, too much 3398 // interdependencies. 3399 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3400 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3401 /*VariablyModified=*/false, 3402 /*ContainsUnexpandedParameterPack=*/false), 3403 Decl(D), InjectedType(TST) { 3404 assert(isa<TemplateSpecializationType>(TST)); 3405 assert(!TST.hasQualifiers()); 3406 assert(TST->isDependentType()); 3407 } 3408 3409public: 3410 QualType getInjectedSpecializationType() const { return InjectedType; } 3411 const TemplateSpecializationType *getInjectedTST() const { 3412 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3413 } 3414 3415 CXXRecordDecl *getDecl() const; 3416 3417 bool isSugared() const { return false; } 3418 QualType desugar() const { return QualType(this, 0); } 3419 3420 static bool classof(const Type *T) { 3421 return T->getTypeClass() == InjectedClassName; 3422 } 3423 static bool classof(const InjectedClassNameType *T) { return true; } 3424}; 3425 3426/// \brief The kind of a tag type. 3427enum TagTypeKind { 3428 /// \brief The "struct" keyword. 3429 TTK_Struct, 3430 /// \brief The "union" keyword. 3431 TTK_Union, 3432 /// \brief The "class" keyword. 3433 TTK_Class, 3434 /// \brief The "enum" keyword. 3435 TTK_Enum 3436}; 3437 3438/// \brief The elaboration keyword that precedes a qualified type name or 3439/// introduces an elaborated-type-specifier. 3440enum ElaboratedTypeKeyword { 3441 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3442 ETK_Struct, 3443 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3444 ETK_Union, 3445 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3446 ETK_Class, 3447 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3448 ETK_Enum, 3449 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3450 /// \c typename T::type. 3451 ETK_Typename, 3452 /// \brief No keyword precedes the qualified type name. 3453 ETK_None 3454}; 3455 3456/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3457/// The keyword in stored in the free bits of the base class. 3458/// Also provides a few static helpers for converting and printing 3459/// elaborated type keyword and tag type kind enumerations. 3460class TypeWithKeyword : public Type { 3461protected: 3462 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3463 QualType Canonical, bool Dependent, bool VariablyModified, 3464 bool ContainsUnexpandedParameterPack) 3465 : Type(tc, Canonical, Dependent, VariablyModified, 3466 ContainsUnexpandedParameterPack) { 3467 TypeWithKeywordBits.Keyword = Keyword; 3468 } 3469 3470public: 3471 ElaboratedTypeKeyword getKeyword() const { 3472 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3473 } 3474 3475 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3476 /// into an elaborated type keyword. 3477 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3478 3479 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3480 /// into a tag type kind. It is an error to provide a type specifier 3481 /// which *isn't* a tag kind here. 3482 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3483 3484 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3485 /// elaborated type keyword. 3486 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3487 3488 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3489 // a TagTypeKind. It is an error to provide an elaborated type keyword 3490 /// which *isn't* a tag kind here. 3491 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3492 3493 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3494 3495 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3496 3497 static const char *getTagTypeKindName(TagTypeKind Kind) { 3498 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3499 } 3500 3501 class CannotCastToThisType {}; 3502 static CannotCastToThisType classof(const Type *); 3503}; 3504 3505/// \brief Represents a type that was referred to using an elaborated type 3506/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3507/// or both. 3508/// 3509/// This type is used to keep track of a type name as written in the 3510/// source code, including tag keywords and any nested-name-specifiers. 3511/// The type itself is always "sugar", used to express what was written 3512/// in the source code but containing no additional semantic information. 3513class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3514 3515 /// \brief The nested name specifier containing the qualifier. 3516 NestedNameSpecifier *NNS; 3517 3518 /// \brief The type that this qualified name refers to. 3519 QualType NamedType; 3520 3521 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3522 QualType NamedType, QualType CanonType) 3523 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3524 NamedType->isDependentType(), 3525 NamedType->isVariablyModifiedType(), 3526 NamedType->containsUnexpandedParameterPack()), 3527 NNS(NNS), NamedType(NamedType) { 3528 assert(!(Keyword == ETK_None && NNS == 0) && 3529 "ElaboratedType cannot have elaborated type keyword " 3530 "and name qualifier both null."); 3531 } 3532 3533 friend class ASTContext; // ASTContext creates these 3534 3535public: 3536 ~ElaboratedType(); 3537 3538 /// \brief Retrieve the qualification on this type. 3539 NestedNameSpecifier *getQualifier() const { return NNS; } 3540 3541 /// \brief Retrieve the type named by the qualified-id. 3542 QualType getNamedType() const { return NamedType; } 3543 3544 /// \brief Remove a single level of sugar. 3545 QualType desugar() const { return getNamedType(); } 3546 3547 /// \brief Returns whether this type directly provides sugar. 3548 bool isSugared() const { return true; } 3549 3550 void Profile(llvm::FoldingSetNodeID &ID) { 3551 Profile(ID, getKeyword(), NNS, NamedType); 3552 } 3553 3554 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3555 NestedNameSpecifier *NNS, QualType NamedType) { 3556 ID.AddInteger(Keyword); 3557 ID.AddPointer(NNS); 3558 NamedType.Profile(ID); 3559 } 3560 3561 static bool classof(const Type *T) { 3562 return T->getTypeClass() == Elaborated; 3563 } 3564 static bool classof(const ElaboratedType *T) { return true; } 3565}; 3566 3567/// \brief Represents a qualified type name for which the type name is 3568/// dependent. 3569/// 3570/// DependentNameType represents a class of dependent types that involve a 3571/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3572/// name of a type. The DependentNameType may start with a "typename" (for a 3573/// typename-specifier), "class", "struct", "union", or "enum" (for a 3574/// dependent elaborated-type-specifier), or nothing (in contexts where we 3575/// know that we must be referring to a type, e.g., in a base class specifier). 3576class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3577 3578 /// \brief The nested name specifier containing the qualifier. 3579 NestedNameSpecifier *NNS; 3580 3581 /// \brief The type that this typename specifier refers to. 3582 const IdentifierInfo *Name; 3583 3584 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3585 const IdentifierInfo *Name, QualType CanonType) 3586 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3587 /*VariablyModified=*/false, 3588 NNS->containsUnexpandedParameterPack()), 3589 NNS(NNS), Name(Name) { 3590 assert(NNS->isDependent() && 3591 "DependentNameType requires a dependent nested-name-specifier"); 3592 } 3593 3594 friend class ASTContext; // ASTContext creates these 3595 3596public: 3597 /// \brief Retrieve the qualification on this type. 3598 NestedNameSpecifier *getQualifier() const { return NNS; } 3599 3600 /// \brief Retrieve the type named by the typename specifier as an 3601 /// identifier. 3602 /// 3603 /// This routine will return a non-NULL identifier pointer when the 3604 /// form of the original typename was terminated by an identifier, 3605 /// e.g., "typename T::type". 3606 const IdentifierInfo *getIdentifier() const { 3607 return Name; 3608 } 3609 3610 bool isSugared() const { return false; } 3611 QualType desugar() const { return QualType(this, 0); } 3612 3613 void Profile(llvm::FoldingSetNodeID &ID) { 3614 Profile(ID, getKeyword(), NNS, Name); 3615 } 3616 3617 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3618 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3619 ID.AddInteger(Keyword); 3620 ID.AddPointer(NNS); 3621 ID.AddPointer(Name); 3622 } 3623 3624 static bool classof(const Type *T) { 3625 return T->getTypeClass() == DependentName; 3626 } 3627 static bool classof(const DependentNameType *T) { return true; } 3628}; 3629 3630/// DependentTemplateSpecializationType - Represents a template 3631/// specialization type whose template cannot be resolved, e.g. 3632/// A<T>::template B<T> 3633class DependentTemplateSpecializationType : 3634 public TypeWithKeyword, public llvm::FoldingSetNode { 3635 3636 /// \brief The nested name specifier containing the qualifier. 3637 NestedNameSpecifier *NNS; 3638 3639 /// \brief The identifier of the template. 3640 const IdentifierInfo *Name; 3641 3642 /// \brief - The number of template arguments named in this class 3643 /// template specialization. 3644 unsigned NumArgs; 3645 3646 const TemplateArgument *getArgBuffer() const { 3647 return reinterpret_cast<const TemplateArgument*>(this+1); 3648 } 3649 TemplateArgument *getArgBuffer() { 3650 return reinterpret_cast<TemplateArgument*>(this+1); 3651 } 3652 3653 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3654 NestedNameSpecifier *NNS, 3655 const IdentifierInfo *Name, 3656 unsigned NumArgs, 3657 const TemplateArgument *Args, 3658 QualType Canon); 3659 3660 friend class ASTContext; // ASTContext creates these 3661 3662public: 3663 NestedNameSpecifier *getQualifier() const { return NNS; } 3664 const IdentifierInfo *getIdentifier() const { return Name; } 3665 3666 /// \brief Retrieve the template arguments. 3667 const TemplateArgument *getArgs() const { 3668 return getArgBuffer(); 3669 } 3670 3671 /// \brief Retrieve the number of template arguments. 3672 unsigned getNumArgs() const { return NumArgs; } 3673 3674 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3675 3676 typedef const TemplateArgument * iterator; 3677 iterator begin() const { return getArgs(); } 3678 iterator end() const; // inline in TemplateBase.h 3679 3680 bool isSugared() const { return false; } 3681 QualType desugar() const { return QualType(this, 0); } 3682 3683 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3684 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3685 } 3686 3687 static void Profile(llvm::FoldingSetNodeID &ID, 3688 const ASTContext &Context, 3689 ElaboratedTypeKeyword Keyword, 3690 NestedNameSpecifier *Qualifier, 3691 const IdentifierInfo *Name, 3692 unsigned NumArgs, 3693 const TemplateArgument *Args); 3694 3695 static bool classof(const Type *T) { 3696 return T->getTypeClass() == DependentTemplateSpecialization; 3697 } 3698 static bool classof(const DependentTemplateSpecializationType *T) { 3699 return true; 3700 } 3701}; 3702 3703/// \brief Represents a pack expansion of types. 3704/// 3705/// Pack expansions are part of C++0x variadic templates. A pack 3706/// expansion contains a pattern, which itself contains one or more 3707/// "unexpanded" parameter packs. When instantiated, a pack expansion 3708/// produces a series of types, each instantiated from the pattern of 3709/// the expansion, where the Ith instantiation of the pattern uses the 3710/// Ith arguments bound to each of the unexpanded parameter packs. The 3711/// pack expansion is considered to "expand" these unexpanded 3712/// parameter packs. 3713/// 3714/// \code 3715/// template<typename ...Types> struct tuple; 3716/// 3717/// template<typename ...Types> 3718/// struct tuple_of_references { 3719/// typedef tuple<Types&...> type; 3720/// }; 3721/// \endcode 3722/// 3723/// Here, the pack expansion \c Types&... is represented via a 3724/// PackExpansionType whose pattern is Types&. 3725class PackExpansionType : public Type, public llvm::FoldingSetNode { 3726 /// \brief The pattern of the pack expansion. 3727 QualType Pattern; 3728 3729 /// \brief The number of expansions that this pack expansion will 3730 /// generate when substituted (+1), or indicates that 3731 /// 3732 /// This field will only have a non-zero value when some of the parameter 3733 /// packs that occur within the pattern have been substituted but others have 3734 /// not. 3735 unsigned NumExpansions; 3736 3737 PackExpansionType(QualType Pattern, QualType Canon, 3738 llvm::Optional<unsigned> NumExpansions) 3739 : Type(PackExpansion, Canon, /*Dependent=*/true, 3740 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3741 /*ContainsUnexpandedParameterPack=*/false), 3742 Pattern(Pattern), 3743 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3744 3745 friend class ASTContext; // ASTContext creates these 3746 3747public: 3748 /// \brief Retrieve the pattern of this pack expansion, which is the 3749 /// type that will be repeatedly instantiated when instantiating the 3750 /// pack expansion itself. 3751 QualType getPattern() const { return Pattern; } 3752 3753 /// \brief Retrieve the number of expansions that this pack expansion will 3754 /// generate, if known. 3755 llvm::Optional<unsigned> getNumExpansions() const { 3756 if (NumExpansions) 3757 return NumExpansions - 1; 3758 3759 return llvm::Optional<unsigned>(); 3760 } 3761 3762 bool isSugared() const { return false; } 3763 QualType desugar() const { return QualType(this, 0); } 3764 3765 void Profile(llvm::FoldingSetNodeID &ID) { 3766 Profile(ID, getPattern(), getNumExpansions()); 3767 } 3768 3769 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3770 llvm::Optional<unsigned> NumExpansions) { 3771 ID.AddPointer(Pattern.getAsOpaquePtr()); 3772 ID.AddBoolean(NumExpansions); 3773 if (NumExpansions) 3774 ID.AddInteger(*NumExpansions); 3775 } 3776 3777 static bool classof(const Type *T) { 3778 return T->getTypeClass() == PackExpansion; 3779 } 3780 static bool classof(const PackExpansionType *T) { 3781 return true; 3782 } 3783}; 3784 3785/// ObjCObjectType - Represents a class type in Objective C. 3786/// Every Objective C type is a combination of a base type and a 3787/// list of protocols. 3788/// 3789/// Given the following declarations: 3790/// @class C; 3791/// @protocol P; 3792/// 3793/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3794/// with base C and no protocols. 3795/// 3796/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3797/// 3798/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3799/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3800/// and no protocols. 3801/// 3802/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3803/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3804/// this should get its own sugar class to better represent the source. 3805class ObjCObjectType : public Type { 3806 // ObjCObjectType.NumProtocols - the number of protocols stored 3807 // after the ObjCObjectPointerType node. 3808 // 3809 // These protocols are those written directly on the type. If 3810 // protocol qualifiers ever become additive, the iterators will need 3811 // to get kindof complicated. 3812 // 3813 // In the canonical object type, these are sorted alphabetically 3814 // and uniqued. 3815 3816 /// Either a BuiltinType or an InterfaceType or sugar for either. 3817 QualType BaseType; 3818 3819 ObjCProtocolDecl * const *getProtocolStorage() const { 3820 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3821 } 3822 3823 ObjCProtocolDecl **getProtocolStorage(); 3824 3825protected: 3826 ObjCObjectType(QualType Canonical, QualType Base, 3827 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3828 3829 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3830 ObjCObjectType(enum Nonce_ObjCInterface) 3831 : Type(ObjCInterface, QualType(), false, false, false), 3832 BaseType(QualType(this_(), 0)) { 3833 ObjCObjectTypeBits.NumProtocols = 0; 3834 } 3835 3836public: 3837 /// getBaseType - Gets the base type of this object type. This is 3838 /// always (possibly sugar for) one of: 3839 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3840 /// user, which is a typedef for an ObjCPointerType) 3841 /// - the 'Class' builtin type (same caveat) 3842 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3843 QualType getBaseType() const { return BaseType; } 3844 3845 bool isObjCId() const { 3846 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3847 } 3848 bool isObjCClass() const { 3849 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3850 } 3851 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3852 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3853 bool isObjCUnqualifiedIdOrClass() const { 3854 if (!qual_empty()) return false; 3855 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3856 return T->getKind() == BuiltinType::ObjCId || 3857 T->getKind() == BuiltinType::ObjCClass; 3858 return false; 3859 } 3860 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3861 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3862 3863 /// Gets the interface declaration for this object type, if the base type 3864 /// really is an interface. 3865 ObjCInterfaceDecl *getInterface() const; 3866 3867 typedef ObjCProtocolDecl * const *qual_iterator; 3868 3869 qual_iterator qual_begin() const { return getProtocolStorage(); } 3870 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3871 3872 bool qual_empty() const { return getNumProtocols() == 0; } 3873 3874 /// getNumProtocols - Return the number of qualifying protocols in this 3875 /// interface type, or 0 if there are none. 3876 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3877 3878 /// \brief Fetch a protocol by index. 3879 ObjCProtocolDecl *getProtocol(unsigned I) const { 3880 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3881 return qual_begin()[I]; 3882 } 3883 3884 bool isSugared() const { return false; } 3885 QualType desugar() const { return QualType(this, 0); } 3886 3887 static bool classof(const Type *T) { 3888 return T->getTypeClass() == ObjCObject || 3889 T->getTypeClass() == ObjCInterface; 3890 } 3891 static bool classof(const ObjCObjectType *) { return true; } 3892}; 3893 3894/// ObjCObjectTypeImpl - A class providing a concrete implementation 3895/// of ObjCObjectType, so as to not increase the footprint of 3896/// ObjCInterfaceType. Code outside of ASTContext and the core type 3897/// system should not reference this type. 3898class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3899 friend class ASTContext; 3900 3901 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3902 // will need to be modified. 3903 3904 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3905 ObjCProtocolDecl * const *Protocols, 3906 unsigned NumProtocols) 3907 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3908 3909public: 3910 void Profile(llvm::FoldingSetNodeID &ID); 3911 static void Profile(llvm::FoldingSetNodeID &ID, 3912 QualType Base, 3913 ObjCProtocolDecl *const *protocols, 3914 unsigned NumProtocols); 3915}; 3916 3917inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3918 return reinterpret_cast<ObjCProtocolDecl**>( 3919 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3920} 3921 3922/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3923/// object oriented design. They basically correspond to C++ classes. There 3924/// are two kinds of interface types, normal interfaces like "NSString" and 3925/// qualified interfaces, which are qualified with a protocol list like 3926/// "NSString<NSCopyable, NSAmazing>". 3927/// 3928/// ObjCInterfaceType guarantees the following properties when considered 3929/// as a subtype of its superclass, ObjCObjectType: 3930/// - There are no protocol qualifiers. To reinforce this, code which 3931/// tries to invoke the protocol methods via an ObjCInterfaceType will 3932/// fail to compile. 3933/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3934/// T->getBaseType() == QualType(T, 0). 3935class ObjCInterfaceType : public ObjCObjectType { 3936 ObjCInterfaceDecl *Decl; 3937 3938 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3939 : ObjCObjectType(Nonce_ObjCInterface), 3940 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3941 friend class ASTContext; // ASTContext creates these. 3942 3943public: 3944 /// getDecl - Get the declaration of this interface. 3945 ObjCInterfaceDecl *getDecl() const { return Decl; } 3946 3947 bool isSugared() const { return false; } 3948 QualType desugar() const { return QualType(this, 0); } 3949 3950 static bool classof(const Type *T) { 3951 return T->getTypeClass() == ObjCInterface; 3952 } 3953 static bool classof(const ObjCInterfaceType *) { return true; } 3954 3955 // Nonsense to "hide" certain members of ObjCObjectType within this 3956 // class. People asking for protocols on an ObjCInterfaceType are 3957 // not going to get what they want: ObjCInterfaceTypes are 3958 // guaranteed to have no protocols. 3959 enum { 3960 qual_iterator, 3961 qual_begin, 3962 qual_end, 3963 getNumProtocols, 3964 getProtocol 3965 }; 3966}; 3967 3968inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3969 if (const ObjCInterfaceType *T = 3970 getBaseType()->getAs<ObjCInterfaceType>()) 3971 return T->getDecl(); 3972 return 0; 3973} 3974 3975/// ObjCObjectPointerType - Used to represent a pointer to an 3976/// Objective C object. These are constructed from pointer 3977/// declarators when the pointee type is an ObjCObjectType (or sugar 3978/// for one). In addition, the 'id' and 'Class' types are typedefs 3979/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3980/// are translated into these. 3981/// 3982/// Pointers to pointers to Objective C objects are still PointerTypes; 3983/// only the first level of pointer gets it own type implementation. 3984class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3985 QualType PointeeType; 3986 3987 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3988 : Type(ObjCObjectPointer, Canonical, false, false, false), 3989 PointeeType(Pointee) {} 3990 friend class ASTContext; // ASTContext creates these. 3991 3992public: 3993 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3994 /// The result will always be an ObjCObjectType or sugar thereof. 3995 QualType getPointeeType() const { return PointeeType; } 3996 3997 /// getObjCObjectType - Gets the type pointed to by this ObjC 3998 /// pointer. This method always returns non-null. 3999 /// 4000 /// This method is equivalent to getPointeeType() except that 4001 /// it discards any typedefs (or other sugar) between this 4002 /// type and the "outermost" object type. So for: 4003 /// @class A; @protocol P; @protocol Q; 4004 /// typedef A<P> AP; 4005 /// typedef A A1; 4006 /// typedef A1<P> A1P; 4007 /// typedef A1P<Q> A1PQ; 4008 /// For 'A*', getObjectType() will return 'A'. 4009 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4010 /// For 'AP*', getObjectType() will return 'A<P>'. 4011 /// For 'A1*', getObjectType() will return 'A'. 4012 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4013 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4014 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4015 /// adding protocols to a protocol-qualified base discards the 4016 /// old qualifiers (for now). But if it didn't, getObjectType() 4017 /// would return 'A1P<Q>' (and we'd have to make iterating over 4018 /// qualifiers more complicated). 4019 const ObjCObjectType *getObjectType() const { 4020 return PointeeType->castAs<ObjCObjectType>(); 4021 } 4022 4023 /// getInterfaceType - If this pointer points to an Objective C 4024 /// @interface type, gets the type for that interface. Any protocol 4025 /// qualifiers on the interface are ignored. 4026 /// 4027 /// \return null if the base type for this pointer is 'id' or 'Class' 4028 const ObjCInterfaceType *getInterfaceType() const { 4029 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4030 } 4031 4032 /// getInterfaceDecl - If this pointer points to an Objective @interface 4033 /// type, gets the declaration for that interface. 4034 /// 4035 /// \return null if the base type for this pointer is 'id' or 'Class' 4036 ObjCInterfaceDecl *getInterfaceDecl() const { 4037 return getObjectType()->getInterface(); 4038 } 4039 4040 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4041 /// its object type is the primitive 'id' type with no protocols. 4042 bool isObjCIdType() const { 4043 return getObjectType()->isObjCUnqualifiedId(); 4044 } 4045 4046 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4047 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4048 bool isObjCClassType() const { 4049 return getObjectType()->isObjCUnqualifiedClass(); 4050 } 4051 4052 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4053 /// non-empty set of protocols. 4054 bool isObjCQualifiedIdType() const { 4055 return getObjectType()->isObjCQualifiedId(); 4056 } 4057 4058 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4059 /// some non-empty set of protocols. 4060 bool isObjCQualifiedClassType() const { 4061 return getObjectType()->isObjCQualifiedClass(); 4062 } 4063 4064 /// An iterator over the qualifiers on the object type. Provided 4065 /// for convenience. This will always iterate over the full set of 4066 /// protocols on a type, not just those provided directly. 4067 typedef ObjCObjectType::qual_iterator qual_iterator; 4068 4069 qual_iterator qual_begin() const { 4070 return getObjectType()->qual_begin(); 4071 } 4072 qual_iterator qual_end() const { 4073 return getObjectType()->qual_end(); 4074 } 4075 bool qual_empty() const { return getObjectType()->qual_empty(); } 4076 4077 /// getNumProtocols - Return the number of qualifying protocols on 4078 /// the object type. 4079 unsigned getNumProtocols() const { 4080 return getObjectType()->getNumProtocols(); 4081 } 4082 4083 /// \brief Retrieve a qualifying protocol by index on the object 4084 /// type. 4085 ObjCProtocolDecl *getProtocol(unsigned I) const { 4086 return getObjectType()->getProtocol(I); 4087 } 4088 4089 bool isSugared() const { return false; } 4090 QualType desugar() const { return QualType(this, 0); } 4091 4092 void Profile(llvm::FoldingSetNodeID &ID) { 4093 Profile(ID, getPointeeType()); 4094 } 4095 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4096 ID.AddPointer(T.getAsOpaquePtr()); 4097 } 4098 static bool classof(const Type *T) { 4099 return T->getTypeClass() == ObjCObjectPointer; 4100 } 4101 static bool classof(const ObjCObjectPointerType *) { return true; } 4102}; 4103 4104/// A qualifier set is used to build a set of qualifiers. 4105class QualifierCollector : public Qualifiers { 4106public: 4107 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4108 4109 /// Collect any qualifiers on the given type and return an 4110 /// unqualified type. The qualifiers are assumed to be consistent 4111 /// with those already in the type. 4112 const Type *strip(QualType type) { 4113 addFastQualifiers(type.getLocalFastQualifiers()); 4114 if (!type.hasLocalNonFastQualifiers()) 4115 return type.getTypePtrUnsafe(); 4116 4117 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4118 addConsistentQualifiers(extQuals->getQualifiers()); 4119 return extQuals->getBaseType(); 4120 } 4121 4122 /// Apply the collected qualifiers to the given type. 4123 QualType apply(const ASTContext &Context, QualType QT) const; 4124 4125 /// Apply the collected qualifiers to the given type. 4126 QualType apply(const ASTContext &Context, const Type* T) const; 4127}; 4128 4129 4130// Inline function definitions. 4131 4132inline const Type *QualType::getTypePtr() const { 4133 return getCommonPtr()->BaseType; 4134} 4135 4136inline const Type *QualType::getTypePtrOrNull() const { 4137 return (isNull() ? 0 : getCommonPtr()->BaseType); 4138} 4139 4140inline SplitQualType QualType::split() const { 4141 if (!hasLocalNonFastQualifiers()) 4142 return SplitQualType(getTypePtrUnsafe(), 4143 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4144 4145 const ExtQuals *eq = getExtQualsUnsafe(); 4146 Qualifiers qs = eq->getQualifiers(); 4147 qs.addFastQualifiers(getLocalFastQualifiers()); 4148 return SplitQualType(eq->getBaseType(), qs); 4149} 4150 4151inline Qualifiers QualType::getLocalQualifiers() const { 4152 Qualifiers Quals; 4153 if (hasLocalNonFastQualifiers()) 4154 Quals = getExtQualsUnsafe()->getQualifiers(); 4155 Quals.addFastQualifiers(getLocalFastQualifiers()); 4156 return Quals; 4157} 4158 4159inline Qualifiers QualType::getQualifiers() const { 4160 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4161 quals.addFastQualifiers(getLocalFastQualifiers()); 4162 return quals; 4163} 4164 4165inline unsigned QualType::getCVRQualifiers() const { 4166 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4167 cvr |= getLocalCVRQualifiers(); 4168 return cvr; 4169} 4170 4171inline QualType QualType::getCanonicalType() const { 4172 QualType canon = getCommonPtr()->CanonicalType; 4173 return canon.withFastQualifiers(getLocalFastQualifiers()); 4174} 4175 4176inline bool QualType::isCanonical() const { 4177 return getTypePtr()->isCanonicalUnqualified(); 4178} 4179 4180inline bool QualType::isCanonicalAsParam() const { 4181 if (!isCanonical()) return false; 4182 if (hasLocalQualifiers()) return false; 4183 4184 const Type *T = getTypePtr(); 4185 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4186 return false; 4187 4188 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4189} 4190 4191inline bool QualType::isConstQualified() const { 4192 return isLocalConstQualified() || 4193 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4194} 4195 4196inline bool QualType::isRestrictQualified() const { 4197 return isLocalRestrictQualified() || 4198 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4199} 4200 4201 4202inline bool QualType::isVolatileQualified() const { 4203 return isLocalVolatileQualified() || 4204 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4205} 4206 4207inline bool QualType::hasQualifiers() const { 4208 return hasLocalQualifiers() || 4209 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4210} 4211 4212inline QualType QualType::getUnqualifiedType() const { 4213 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4214 return QualType(getTypePtr(), 0); 4215 4216 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4217} 4218 4219inline SplitQualType QualType::getSplitUnqualifiedType() const { 4220 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4221 return split(); 4222 4223 return getSplitUnqualifiedTypeImpl(*this); 4224} 4225 4226inline void QualType::removeLocalConst() { 4227 removeLocalFastQualifiers(Qualifiers::Const); 4228} 4229 4230inline void QualType::removeLocalRestrict() { 4231 removeLocalFastQualifiers(Qualifiers::Restrict); 4232} 4233 4234inline void QualType::removeLocalVolatile() { 4235 removeLocalFastQualifiers(Qualifiers::Volatile); 4236} 4237 4238inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4239 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4240 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4241 4242 // Fast path: we don't need to touch the slow qualifiers. 4243 removeLocalFastQualifiers(Mask); 4244} 4245 4246/// getAddressSpace - Return the address space of this type. 4247inline unsigned QualType::getAddressSpace() const { 4248 return getQualifiers().getAddressSpace(); 4249} 4250 4251/// getObjCGCAttr - Return the gc attribute of this type. 4252inline Qualifiers::GC QualType::getObjCGCAttr() const { 4253 return getQualifiers().getObjCGCAttr(); 4254} 4255 4256inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4257 if (const PointerType *PT = t.getAs<PointerType>()) { 4258 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4259 return FT->getExtInfo(); 4260 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4261 return FT->getExtInfo(); 4262 4263 return FunctionType::ExtInfo(); 4264} 4265 4266inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4267 return getFunctionExtInfo(*t); 4268} 4269 4270/// isMoreQualifiedThan - Determine whether this type is more 4271/// qualified than the Other type. For example, "const volatile int" 4272/// is more qualified than "const int", "volatile int", and 4273/// "int". However, it is not more qualified than "const volatile 4274/// int". 4275inline bool QualType::isMoreQualifiedThan(QualType other) const { 4276 Qualifiers myQuals = getQualifiers(); 4277 Qualifiers otherQuals = other.getQualifiers(); 4278 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4279} 4280 4281/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4282/// as qualified as the Other type. For example, "const volatile 4283/// int" is at least as qualified as "const int", "volatile int", 4284/// "int", and "const volatile int". 4285inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4286 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4287} 4288 4289/// getNonReferenceType - If Type is a reference type (e.g., const 4290/// int&), returns the type that the reference refers to ("const 4291/// int"). Otherwise, returns the type itself. This routine is used 4292/// throughout Sema to implement C++ 5p6: 4293/// 4294/// If an expression initially has the type "reference to T" (8.3.2, 4295/// 8.5.3), the type is adjusted to "T" prior to any further 4296/// analysis, the expression designates the object or function 4297/// denoted by the reference, and the expression is an lvalue. 4298inline QualType QualType::getNonReferenceType() const { 4299 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4300 return RefType->getPointeeType(); 4301 else 4302 return *this; 4303} 4304 4305/// \brief Tests whether the type is categorized as a fundamental type. 4306/// 4307/// \returns True for types specified in C++0x [basic.fundamental]. 4308inline bool Type::isFundamentalType() const { 4309 return isVoidType() || 4310 // FIXME: It's really annoying that we don't have an 4311 // 'isArithmeticType()' which agrees with the standard definition. 4312 (isArithmeticType() && !isEnumeralType()); 4313} 4314 4315/// \brief Tests whether the type is categorized as a compound type. 4316/// 4317/// \returns True for types specified in C++0x [basic.compound]. 4318inline bool Type::isCompoundType() const { 4319 // C++0x [basic.compound]p1: 4320 // Compound types can be constructed in the following ways: 4321 // -- arrays of objects of a given type [...]; 4322 return isArrayType() || 4323 // -- functions, which have parameters of given types [...]; 4324 isFunctionType() || 4325 // -- pointers to void or objects or functions [...]; 4326 isPointerType() || 4327 // -- references to objects or functions of a given type. [...] 4328 isReferenceType() || 4329 // -- classes containing a sequence of objects of various types, [...]; 4330 isRecordType() || 4331 // -- unions, which ar classes capable of containing objects of different types at different times; 4332 isUnionType() || 4333 // -- enumerations, which comprise a set of named constant values. [...]; 4334 isEnumeralType() || 4335 // -- pointers to non-static class members, [...]. 4336 isMemberPointerType(); 4337} 4338 4339inline bool Type::isFunctionType() const { 4340 return isa<FunctionType>(CanonicalType); 4341} 4342inline bool Type::isPointerType() const { 4343 return isa<PointerType>(CanonicalType); 4344} 4345inline bool Type::isAnyPointerType() const { 4346 return isPointerType() || isObjCObjectPointerType(); 4347} 4348inline bool Type::isBlockPointerType() const { 4349 return isa<BlockPointerType>(CanonicalType); 4350} 4351inline bool Type::isReferenceType() const { 4352 return isa<ReferenceType>(CanonicalType); 4353} 4354inline bool Type::isLValueReferenceType() const { 4355 return isa<LValueReferenceType>(CanonicalType); 4356} 4357inline bool Type::isRValueReferenceType() const { 4358 return isa<RValueReferenceType>(CanonicalType); 4359} 4360inline bool Type::isFunctionPointerType() const { 4361 if (const PointerType *T = getAs<PointerType>()) 4362 return T->getPointeeType()->isFunctionType(); 4363 else 4364 return false; 4365} 4366inline bool Type::isMemberPointerType() const { 4367 return isa<MemberPointerType>(CanonicalType); 4368} 4369inline bool Type::isMemberFunctionPointerType() const { 4370 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4371 return T->isMemberFunctionPointer(); 4372 else 4373 return false; 4374} 4375inline bool Type::isMemberDataPointerType() const { 4376 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4377 return T->isMemberDataPointer(); 4378 else 4379 return false; 4380} 4381inline bool Type::isArrayType() const { 4382 return isa<ArrayType>(CanonicalType); 4383} 4384inline bool Type::isConstantArrayType() const { 4385 return isa<ConstantArrayType>(CanonicalType); 4386} 4387inline bool Type::isIncompleteArrayType() const { 4388 return isa<IncompleteArrayType>(CanonicalType); 4389} 4390inline bool Type::isVariableArrayType() const { 4391 return isa<VariableArrayType>(CanonicalType); 4392} 4393inline bool Type::isDependentSizedArrayType() const { 4394 return isa<DependentSizedArrayType>(CanonicalType); 4395} 4396inline bool Type::isBuiltinType() const { 4397 return isa<BuiltinType>(CanonicalType); 4398} 4399inline bool Type::isRecordType() const { 4400 return isa<RecordType>(CanonicalType); 4401} 4402inline bool Type::isEnumeralType() const { 4403 return isa<EnumType>(CanonicalType); 4404} 4405inline bool Type::isAnyComplexType() const { 4406 return isa<ComplexType>(CanonicalType); 4407} 4408inline bool Type::isVectorType() const { 4409 return isa<VectorType>(CanonicalType); 4410} 4411inline bool Type::isExtVectorType() const { 4412 return isa<ExtVectorType>(CanonicalType); 4413} 4414inline bool Type::isObjCObjectPointerType() const { 4415 return isa<ObjCObjectPointerType>(CanonicalType); 4416} 4417inline bool Type::isObjCObjectType() const { 4418 return isa<ObjCObjectType>(CanonicalType); 4419} 4420inline bool Type::isObjCObjectOrInterfaceType() const { 4421 return isa<ObjCInterfaceType>(CanonicalType) || 4422 isa<ObjCObjectType>(CanonicalType); 4423} 4424 4425inline bool Type::isObjCQualifiedIdType() const { 4426 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4427 return OPT->isObjCQualifiedIdType(); 4428 return false; 4429} 4430inline bool Type::isObjCQualifiedClassType() const { 4431 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4432 return OPT->isObjCQualifiedClassType(); 4433 return false; 4434} 4435inline bool Type::isObjCIdType() const { 4436 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4437 return OPT->isObjCIdType(); 4438 return false; 4439} 4440inline bool Type::isObjCClassType() const { 4441 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4442 return OPT->isObjCClassType(); 4443 return false; 4444} 4445inline bool Type::isObjCSelType() const { 4446 if (const PointerType *OPT = getAs<PointerType>()) 4447 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4448 return false; 4449} 4450inline bool Type::isObjCBuiltinType() const { 4451 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4452} 4453inline bool Type::isTemplateTypeParmType() const { 4454 return isa<TemplateTypeParmType>(CanonicalType); 4455} 4456 4457inline bool Type::isSpecificBuiltinType(unsigned K) const { 4458 if (const BuiltinType *BT = getAs<BuiltinType>()) 4459 if (BT->getKind() == (BuiltinType::Kind) K) 4460 return true; 4461 return false; 4462} 4463 4464inline bool Type::isPlaceholderType() const { 4465 if (const BuiltinType *BT = getAs<BuiltinType>()) 4466 return BT->isPlaceholderType(); 4467 return false; 4468} 4469 4470inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4471 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4472 return (BT->getKind() == (BuiltinType::Kind) K); 4473 return false; 4474} 4475 4476/// \brief Determines whether this is a type for which one can define 4477/// an overloaded operator. 4478inline bool Type::isOverloadableType() const { 4479 return isDependentType() || isRecordType() || isEnumeralType(); 4480} 4481 4482inline bool Type::hasPointerRepresentation() const { 4483 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4484 isObjCObjectPointerType() || isNullPtrType()); 4485} 4486 4487inline bool Type::hasObjCPointerRepresentation() const { 4488 return isObjCObjectPointerType(); 4489} 4490 4491inline const Type *Type::getBaseElementTypeUnsafe() const { 4492 const Type *type = this; 4493 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4494 type = arrayType->getElementType().getTypePtr(); 4495 return type; 4496} 4497 4498/// Insertion operator for diagnostics. This allows sending QualType's into a 4499/// diagnostic with <<. 4500inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4501 QualType T) { 4502 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4503 Diagnostic::ak_qualtype); 4504 return DB; 4505} 4506 4507/// Insertion operator for partial diagnostics. This allows sending QualType's 4508/// into a diagnostic with <<. 4509inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4510 QualType T) { 4511 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4512 Diagnostic::ak_qualtype); 4513 return PD; 4514} 4515 4516// Helper class template that is used by Type::getAs to ensure that one does 4517// not try to look through a qualified type to get to an array type. 4518template<typename T, 4519 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4520 llvm::is_base_of<ArrayType, T>::value)> 4521struct ArrayType_cannot_be_used_with_getAs { }; 4522 4523template<typename T> 4524struct ArrayType_cannot_be_used_with_getAs<T, true>; 4525 4526/// Member-template getAs<specific type>'. 4527template <typename T> const T *Type::getAs() const { 4528 ArrayType_cannot_be_used_with_getAs<T> at; 4529 (void)at; 4530 4531 // If this is directly a T type, return it. 4532 if (const T *Ty = dyn_cast<T>(this)) 4533 return Ty; 4534 4535 // If the canonical form of this type isn't the right kind, reject it. 4536 if (!isa<T>(CanonicalType)) 4537 return 0; 4538 4539 // If this is a typedef for the type, strip the typedef off without 4540 // losing all typedef information. 4541 return cast<T>(getUnqualifiedDesugaredType()); 4542} 4543 4544inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4545 // If this is directly an array type, return it. 4546 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4547 return arr; 4548 4549 // If the canonical form of this type isn't the right kind, reject it. 4550 if (!isa<ArrayType>(CanonicalType)) 4551 return 0; 4552 4553 // If this is a typedef for the type, strip the typedef off without 4554 // losing all typedef information. 4555 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4556} 4557 4558template <typename T> const T *Type::castAs() const { 4559 ArrayType_cannot_be_used_with_getAs<T> at; 4560 (void) at; 4561 4562 assert(isa<T>(CanonicalType)); 4563 if (const T *ty = dyn_cast<T>(this)) return ty; 4564 return cast<T>(getUnqualifiedDesugaredType()); 4565} 4566 4567inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4568 assert(isa<ArrayType>(CanonicalType)); 4569 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4570 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4571} 4572 4573} // end namespace clang 4574 4575#endif 4576