clang  3.9.0
Type.h
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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 /// \file
10 /// \brief C Language Family Type Representation
11 ///
12 /// This file defines the clang::Type interface and subclasses, used to
13 /// represent types for languages in the C family.
14 ///
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_CLANG_AST_TYPE_H
18 #define LLVM_CLANG_AST_TYPE_H
19 
21 #include "clang/AST/TemplateName.h"
23 #include "clang/Basic/Diagnostic.h"
25 #include "clang/Basic/LLVM.h"
26 #include "clang/Basic/Linkage.h"
28 #include "clang/Basic/Specifiers.h"
29 #include "clang/Basic/Visibility.h"
30 #include "llvm/ADT/APInt.h"
31 #include "llvm/ADT/FoldingSet.h"
32 #include "llvm/ADT/Optional.h"
33 #include "llvm/ADT/PointerIntPair.h"
34 #include "llvm/ADT/PointerUnion.h"
35 #include "llvm/ADT/Twine.h"
36 #include "llvm/ADT/iterator_range.h"
37 #include "llvm/Support/ErrorHandling.h"
38 
39 namespace clang {
40  enum {
43  };
44  class Type;
45  class ExtQuals;
46  class QualType;
47 }
48 
49 namespace llvm {
50  template <typename T>
51  class PointerLikeTypeTraits;
52  template<>
54  public:
55  static inline void *getAsVoidPointer(::clang::Type *P) { return P; }
56  static inline ::clang::Type *getFromVoidPointer(void *P) {
57  return static_cast< ::clang::Type*>(P);
58  }
59  enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
60  };
61  template<>
63  public:
64  static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }
65  static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
66  return static_cast< ::clang::ExtQuals*>(P);
67  }
68  enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
69  };
70 
71  template <>
72  struct isPodLike<clang::QualType> { static const bool value = true; };
73 }
74 
75 namespace clang {
76  class ASTContext;
77  class TypedefNameDecl;
78  class TemplateDecl;
79  class TemplateTypeParmDecl;
80  class NonTypeTemplateParmDecl;
81  class TemplateTemplateParmDecl;
82  class TagDecl;
83  class RecordDecl;
84  class CXXRecordDecl;
85  class EnumDecl;
86  class FieldDecl;
87  class FunctionDecl;
88  class ObjCInterfaceDecl;
89  class ObjCProtocolDecl;
90  class ObjCMethodDecl;
91  class UnresolvedUsingTypenameDecl;
92  class Expr;
93  class Stmt;
94  class SourceLocation;
95  class StmtIteratorBase;
96  class TemplateArgument;
97  class TemplateArgumentLoc;
98  class TemplateArgumentListInfo;
99  class ElaboratedType;
100  class ExtQuals;
101  class ExtQualsTypeCommonBase;
102  struct PrintingPolicy;
103 
104  template <typename> class CanQual;
105  typedef CanQual<Type> CanQualType;
106 
107  // Provide forward declarations for all of the *Type classes
108 #define TYPE(Class, Base) class Class##Type;
109 #include "clang/AST/TypeNodes.def"
110 
111 /// The collection of all-type qualifiers we support.
112 /// Clang supports five independent qualifiers:
113 /// * C99: const, volatile, and restrict
114 /// * MS: __unaligned
115 /// * Embedded C (TR18037): address spaces
116 /// * Objective C: the GC attributes (none, weak, or strong)
117 class Qualifiers {
118 public:
119  enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
120  Const = 0x1,
121  Restrict = 0x2,
122  Volatile = 0x4,
124  };
125 
126  enum GC {
127  GCNone = 0,
130  };
131 
133  /// There is no lifetime qualification on this type.
135 
136  /// This object can be modified without requiring retains or
137  /// releases.
139 
140  /// Assigning into this object requires the old value to be
141  /// released and the new value to be retained. The timing of the
142  /// release of the old value is inexact: it may be moved to
143  /// immediately after the last known point where the value is
144  /// live.
146 
147  /// Reading or writing from this object requires a barrier call.
149 
150  /// Assigning into this object requires a lifetime extension.
152  };
153 
154  enum {
155  /// The maximum supported address space number.
156  /// 23 bits should be enough for anyone.
157  MaxAddressSpace = 0x7fffffu,
158 
159  /// The width of the "fast" qualifier mask.
161 
162  /// The fast qualifier mask.
163  FastMask = (1 << FastWidth) - 1
164  };
165 
166  Qualifiers() : Mask(0) {}
167 
168  /// Returns the common set of qualifiers while removing them from
169  /// the given sets.
171  // If both are only CVR-qualified, bit operations are sufficient.
172  if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
173  Qualifiers Q;
174  Q.Mask = L.Mask & R.Mask;
175  L.Mask &= ~Q.Mask;
176  R.Mask &= ~Q.Mask;
177  return Q;
178  }
179 
180  Qualifiers Q;
181  unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
182  Q.addCVRQualifiers(CommonCRV);
183  L.removeCVRQualifiers(CommonCRV);
184  R.removeCVRQualifiers(CommonCRV);
185 
186  if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
188  L.removeObjCGCAttr();
189  R.removeObjCGCAttr();
190  }
191 
192  if (L.getObjCLifetime() == R.getObjCLifetime()) {
194  L.removeObjCLifetime();
195  R.removeObjCLifetime();
196  }
197 
198  if (L.getAddressSpace() == R.getAddressSpace()) {
200  L.removeAddressSpace();
201  R.removeAddressSpace();
202  }
203  return Q;
204  }
205 
206  static Qualifiers fromFastMask(unsigned Mask) {
207  Qualifiers Qs;
208  Qs.addFastQualifiers(Mask);
209  return Qs;
210  }
211 
212  static Qualifiers fromCVRMask(unsigned CVR) {
213  Qualifiers Qs;
214  Qs.addCVRQualifiers(CVR);
215  return Qs;
216  }
217 
218  static Qualifiers fromCVRUMask(unsigned CVRU) {
219  Qualifiers Qs;
220  Qs.addCVRUQualifiers(CVRU);
221  return Qs;
222  }
223 
224  // Deserialize qualifiers from an opaque representation.
225  static Qualifiers fromOpaqueValue(unsigned opaque) {
226  Qualifiers Qs;
227  Qs.Mask = opaque;
228  return Qs;
229  }
230 
231  // Serialize these qualifiers into an opaque representation.
232  unsigned getAsOpaqueValue() const {
233  return Mask;
234  }
235 
236  bool hasConst() const { return Mask & Const; }
237  void setConst(bool flag) {
238  Mask = (Mask & ~Const) | (flag ? Const : 0);
239  }
240  void removeConst() { Mask &= ~Const; }
241  void addConst() { Mask |= Const; }
242 
243  bool hasVolatile() const { return Mask & Volatile; }
244  void setVolatile(bool flag) {
245  Mask = (Mask & ~Volatile) | (flag ? Volatile : 0);
246  }
247  void removeVolatile() { Mask &= ~Volatile; }
248  void addVolatile() { Mask |= Volatile; }
249 
250  bool hasRestrict() const { return Mask & Restrict; }
251  void setRestrict(bool flag) {
252  Mask = (Mask & ~Restrict) | (flag ? Restrict : 0);
253  }
254  void removeRestrict() { Mask &= ~Restrict; }
255  void addRestrict() { Mask |= Restrict; }
256 
257  bool hasCVRQualifiers() const { return getCVRQualifiers(); }
258  unsigned getCVRQualifiers() const { return Mask & CVRMask; }
259  void setCVRQualifiers(unsigned mask) {
260  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits");
261  Mask = (Mask & ~CVRMask) | mask;
262  }
263  void removeCVRQualifiers(unsigned mask) {
264  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits");
265  Mask &= ~mask;
266  }
269  }
270  void addCVRQualifiers(unsigned mask) {
271  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits");
272  Mask |= mask;
273  }
274  void addCVRUQualifiers(unsigned mask) {
275  assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits");
276  Mask |= mask;
277  }
278 
279  bool hasUnaligned() const { return Mask & UMask; }
280  void setUnaligned(bool flag) {
281  Mask = (Mask & ~UMask) | (flag ? UMask : 0);
282  }
283  void removeUnaligned() { Mask &= ~UMask; }
284  void addUnaligned() { Mask |= UMask; }
285 
286  bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
287  GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
289  Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
290  }
293  assert(type);
294  setObjCGCAttr(type);
295  }
297  Qualifiers qs = *this;
298  qs.removeObjCGCAttr();
299  return qs;
300  }
302  Qualifiers qs = *this;
303  qs.removeObjCLifetime();
304  return qs;
305  }
306 
307  bool hasObjCLifetime() const { return Mask & LifetimeMask; }
309  return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
310  }
312  Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
313  }
316  assert(type);
317  assert(!hasObjCLifetime());
318  Mask |= (type << LifetimeShift);
319  }
320 
321  /// True if the lifetime is neither None or ExplicitNone.
323  ObjCLifetime lifetime = getObjCLifetime();
324  return (lifetime > OCL_ExplicitNone);
325  }
326 
327  /// True if the lifetime is either strong or weak.
329  ObjCLifetime lifetime = getObjCLifetime();
330  return (lifetime == OCL_Strong || lifetime == OCL_Weak);
331  }
332 
333  bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
334  unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; }
335  void setAddressSpace(unsigned space) {
336  assert(space <= MaxAddressSpace);
337  Mask = (Mask & ~AddressSpaceMask)
338  | (((uint32_t) space) << AddressSpaceShift);
339  }
341  void addAddressSpace(unsigned space) {
342  assert(space);
343  setAddressSpace(space);
344  }
345 
346  // Fast qualifiers are those that can be allocated directly
347  // on a QualType object.
348  bool hasFastQualifiers() const { return getFastQualifiers(); }
349  unsigned getFastQualifiers() const { return Mask & FastMask; }
350  void setFastQualifiers(unsigned mask) {
351  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits");
352  Mask = (Mask & ~FastMask) | mask;
353  }
354  void removeFastQualifiers(unsigned mask) {
355  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits");
356  Mask &= ~mask;
357  }
360  }
361  void addFastQualifiers(unsigned mask) {
362  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits");
363  Mask |= mask;
364  }
365 
366  /// Return true if the set contains any qualifiers which require an ExtQuals
367  /// node to be allocated.
368  bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
370  Qualifiers Quals = *this;
371  Quals.setFastQualifiers(0);
372  return Quals;
373  }
374 
375  /// Return true if the set contains any qualifiers.
376  bool hasQualifiers() const { return Mask; }
377  bool empty() const { return !Mask; }
378 
379  /// Add the qualifiers from the given set to this set.
381  // If the other set doesn't have any non-boolean qualifiers, just
382  // bit-or it in.
383  if (!(Q.Mask & ~CVRMask))
384  Mask |= Q.Mask;
385  else {
386  Mask |= (Q.Mask & CVRMask);
387  if (Q.hasAddressSpace())
389  if (Q.hasObjCGCAttr())
391  if (Q.hasObjCLifetime())
393  }
394  }
395 
396  /// \brief Remove the qualifiers from the given set from this set.
398  // If the other set doesn't have any non-boolean qualifiers, just
399  // bit-and the inverse in.
400  if (!(Q.Mask & ~CVRMask))
401  Mask &= ~Q.Mask;
402  else {
403  Mask &= ~(Q.Mask & CVRMask);
404  if (getObjCGCAttr() == Q.getObjCGCAttr())
406  if (getObjCLifetime() == Q.getObjCLifetime())
408  if (getAddressSpace() == Q.getAddressSpace())
410  }
411  }
412 
413  /// Add the qualifiers from the given set to this set, given that
414  /// they don't conflict.
416  assert(getAddressSpace() == qs.getAddressSpace() ||
417  !hasAddressSpace() || !qs.hasAddressSpace());
418  assert(getObjCGCAttr() == qs.getObjCGCAttr() ||
419  !hasObjCGCAttr() || !qs.hasObjCGCAttr());
420  assert(getObjCLifetime() == qs.getObjCLifetime() ||
421  !hasObjCLifetime() || !qs.hasObjCLifetime());
422  Mask |= qs.Mask;
423  }
424 
425  /// Returns true if this address space is a superset of the other one.
426  /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
427  /// overlapping address spaces.
428  /// CL1.1 or CL1.2:
429  /// every address space is a superset of itself.
430  /// CL2.0 adds:
431  /// __generic is a superset of any address space except for __constant.
433  return
434  // Address spaces must match exactly.
435  getAddressSpace() == other.getAddressSpace() ||
436  // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
437  // for __constant can be used as __generic.
440  }
441 
442  /// Determines if these qualifiers compatibly include another set.
443  /// Generally this answers the question of whether an object with the other
444  /// qualifiers can be safely used as an object with these qualifiers.
445  bool compatiblyIncludes(Qualifiers other) const {
446  return isAddressSpaceSupersetOf(other) &&
447  // ObjC GC qualifiers can match, be added, or be removed, but can't
448  // be changed.
449  (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
450  !other.hasObjCGCAttr()) &&
451  // ObjC lifetime qualifiers must match exactly.
452  getObjCLifetime() == other.getObjCLifetime() &&
453  // CVR qualifiers may subset.
454  (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
455  // U qualifier may superset.
456  (!other.hasUnaligned() || hasUnaligned());
457  }
458 
459  /// \brief Determines if these qualifiers compatibly include another set of
460  /// qualifiers from the narrow perspective of Objective-C ARC lifetime.
461  ///
462  /// One set of Objective-C lifetime qualifiers compatibly includes the other
463  /// if the lifetime qualifiers match, or if both are non-__weak and the
464  /// including set also contains the 'const' qualifier, or both are non-__weak
465  /// and one is None (which can only happen in non-ARC modes).
467  if (getObjCLifetime() == other.getObjCLifetime())
468  return true;
469 
470  if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
471  return false;
472 
473  if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
474  return true;
475 
476  return hasConst();
477  }
478 
479  /// \brief Determine whether this set of qualifiers is a strict superset of
480  /// another set of qualifiers, not considering qualifier compatibility.
481  bool isStrictSupersetOf(Qualifiers Other) const;
482 
483  bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
484  bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }
485 
486  explicit operator bool() const { return hasQualifiers(); }
487 
489  addQualifiers(R);
490  return *this;
491  }
492 
493  // Union two qualifier sets. If an enumerated qualifier appears
494  // in both sets, use the one from the right.
496  L += R;
497  return L;
498  }
499 
501  removeQualifiers(R);
502  return *this;
503  }
504 
505  /// \brief Compute the difference between two qualifier sets.
507  L -= R;
508  return L;
509  }
510 
511  std::string getAsString() const;
512  std::string getAsString(const PrintingPolicy &Policy) const;
513 
514  bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
515  void print(raw_ostream &OS, const PrintingPolicy &Policy,
516  bool appendSpaceIfNonEmpty = false) const;
517 
518  void Profile(llvm::FoldingSetNodeID &ID) const {
519  ID.AddInteger(Mask);
520  }
521 
522 private:
523 
524  // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31|
525  // |C R V|U|GCAttr|Lifetime|AddressSpace|
526  uint32_t Mask;
527 
528  static const uint32_t UMask = 0x8;
529  static const uint32_t UShift = 3;
530  static const uint32_t GCAttrMask = 0x30;
531  static const uint32_t GCAttrShift = 4;
532  static const uint32_t LifetimeMask = 0x1C0;
533  static const uint32_t LifetimeShift = 6;
534  static const uint32_t AddressSpaceMask =
535  ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
536  static const uint32_t AddressSpaceShift = 9;
537 };
538 
539 /// A std::pair-like structure for storing a qualified type split
540 /// into its local qualifiers and its locally-unqualified type.
542  /// The locally-unqualified type.
543  const Type *Ty;
544 
545  /// The local qualifiers.
547 
548  SplitQualType() : Ty(nullptr), Quals() {}
549  SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}
550 
551  SplitQualType getSingleStepDesugaredType() const; // end of this file
552 
553  // Make std::tie work.
554  std::pair<const Type *,Qualifiers> asPair() const {
555  return std::pair<const Type *, Qualifiers>(Ty, Quals);
556  }
557 
559  return a.Ty == b.Ty && a.Quals == b.Quals;
560  }
562  return a.Ty != b.Ty || a.Quals != b.Quals;
563  }
564 };
565 
566 /// The kind of type we are substituting Objective-C type arguments into.
567 ///
568 /// The kind of substitution affects the replacement of type parameters when
569 /// no concrete type information is provided, e.g., when dealing with an
570 /// unspecialized type.
572  /// An ordinary type.
573  Ordinary,
574  /// The result type of a method or function.
575  Result,
576  /// The parameter type of a method or function.
577  Parameter,
578  /// The type of a property.
579  Property,
580  /// The superclass of a type.
581  Superclass,
582 };
583 
584 /// A (possibly-)qualified type.
585 ///
586 /// For efficiency, we don't store CV-qualified types as nodes on their
587 /// own: instead each reference to a type stores the qualifiers. This
588 /// greatly reduces the number of nodes we need to allocate for types (for
589 /// example we only need one for 'int', 'const int', 'volatile int',
590 /// 'const volatile int', etc).
591 ///
592 /// As an added efficiency bonus, instead of making this a pair, we
593 /// just store the two bits we care about in the low bits of the
594 /// pointer. To handle the packing/unpacking, we make QualType be a
595 /// simple wrapper class that acts like a smart pointer. A third bit
596 /// indicates whether there are extended qualifiers present, in which
597 /// case the pointer points to a special structure.
598 class QualType {
599  // Thankfully, these are efficiently composable.
600  llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>,
602 
603  const ExtQuals *getExtQualsUnsafe() const {
604  return Value.getPointer().get<const ExtQuals*>();
605  }
606 
607  const Type *getTypePtrUnsafe() const {
608  return Value.getPointer().get<const Type*>();
609  }
610 
611  const ExtQualsTypeCommonBase *getCommonPtr() const {
612  assert(!isNull() && "Cannot retrieve a NULL type pointer");
613  uintptr_t CommonPtrVal
614  = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
615  CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
616  return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
617  }
618 
619  friend class QualifierCollector;
620 public:
621  QualType() {}
622 
623  QualType(const Type *Ptr, unsigned Quals)
624  : Value(Ptr, Quals) {}
625  QualType(const ExtQuals *Ptr, unsigned Quals)
626  : Value(Ptr, Quals) {}
627 
628  unsigned getLocalFastQualifiers() const { return Value.getInt(); }
629  void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }
630 
631  /// Retrieves a pointer to the underlying (unqualified) type.
632  ///
633  /// This function requires that the type not be NULL. If the type might be
634  /// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
635  const Type *getTypePtr() const;
636 
637  const Type *getTypePtrOrNull() const;
638 
639  /// Retrieves a pointer to the name of the base type.
640  const IdentifierInfo *getBaseTypeIdentifier() const;
641 
642  /// Divides a QualType into its unqualified type and a set of local
643  /// qualifiers.
644  SplitQualType split() const;
645 
646  void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }
647  static QualType getFromOpaquePtr(const void *Ptr) {
648  QualType T;
649  T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
650  return T;
651  }
652 
653  const Type &operator*() const {
654  return *getTypePtr();
655  }
656 
657  const Type *operator->() const {
658  return getTypePtr();
659  }
660 
661  bool isCanonical() const;
662  bool isCanonicalAsParam() const;
663 
664  /// Return true if this QualType doesn't point to a type yet.
665  bool isNull() const {
666  return Value.getPointer().isNull();
667  }
668 
669  /// \brief Determine whether this particular QualType instance has the
670  /// "const" qualifier set, without looking through typedefs that may have
671  /// added "const" at a different level.
672  bool isLocalConstQualified() const {
673  return (getLocalFastQualifiers() & Qualifiers::Const);
674  }
675 
676  /// \brief Determine whether this type is const-qualified.
677  bool isConstQualified() const;
678 
679  /// \brief Determine whether this particular QualType instance has the
680  /// "restrict" qualifier set, without looking through typedefs that may have
681  /// added "restrict" at a different level.
683  return (getLocalFastQualifiers() & Qualifiers::Restrict);
684  }
685 
686  /// \brief Determine whether this type is restrict-qualified.
687  bool isRestrictQualified() const;
688 
689  /// \brief Determine whether this particular QualType instance has the
690  /// "volatile" qualifier set, without looking through typedefs that may have
691  /// added "volatile" at a different level.
693  return (getLocalFastQualifiers() & Qualifiers::Volatile);
694  }
695 
696  /// \brief Determine whether this type is volatile-qualified.
697  bool isVolatileQualified() const;
698 
699  /// \brief Determine whether this particular QualType instance has any
700  /// qualifiers, without looking through any typedefs that might add
701  /// qualifiers at a different level.
702  bool hasLocalQualifiers() const {
703  return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
704  }
705 
706  /// \brief Determine whether this type has any qualifiers.
707  bool hasQualifiers() const;
708 
709  /// \brief Determine whether this particular QualType instance has any
710  /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
711  /// instance.
713  return Value.getPointer().is<const ExtQuals*>();
714  }
715 
716  /// \brief Retrieve the set of qualifiers local to this particular QualType
717  /// instance, not including any qualifiers acquired through typedefs or
718  /// other sugar.
719  Qualifiers getLocalQualifiers() const;
720 
721  /// \brief Retrieve the set of qualifiers applied to this type.
722  Qualifiers getQualifiers() const;
723 
724  /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers
725  /// local to this particular QualType instance, not including any qualifiers
726  /// acquired through typedefs or other sugar.
727  unsigned getLocalCVRQualifiers() const {
728  return getLocalFastQualifiers();
729  }
730 
731  /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers
732  /// applied to this type.
733  unsigned getCVRQualifiers() const;
734 
735  bool isConstant(const ASTContext& Ctx) const {
736  return QualType::isConstant(*this, Ctx);
737  }
738 
739  /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
740  bool isPODType(const ASTContext &Context) const;
741 
742  /// Return true if this is a POD type according to the rules of the C++98
743  /// standard, regardless of the current compilation's language.
744  bool isCXX98PODType(const ASTContext &Context) const;
745 
746  /// Return true if this is a POD type according to the more relaxed rules
747  /// of the C++11 standard, regardless of the current compilation's language.
748  /// (C++0x [basic.types]p9)
749  bool isCXX11PODType(const ASTContext &Context) const;
750 
751  /// Return true if this is a trivial type per (C++0x [basic.types]p9)
752  bool isTrivialType(const ASTContext &Context) const;
753 
754  /// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
755  bool isTriviallyCopyableType(const ASTContext &Context) const;
756 
757  // Don't promise in the API that anything besides 'const' can be
758  // easily added.
759 
760  /// Add the `const` type qualifier to this QualType.
761  void addConst() {
763  }
764  QualType withConst() const {
765  return withFastQualifiers(Qualifiers::Const);
766  }
767 
768  /// Add the `volatile` type qualifier to this QualType.
769  void addVolatile() {
771  }
773  return withFastQualifiers(Qualifiers::Volatile);
774  }
775 
776  /// Add the `restrict` qualifier to this QualType.
777  void addRestrict() {
779  }
781  return withFastQualifiers(Qualifiers::Restrict);
782  }
783 
784  QualType withCVRQualifiers(unsigned CVR) const {
785  return withFastQualifiers(CVR);
786  }
787 
788  void addFastQualifiers(unsigned TQs) {
789  assert(!(TQs & ~Qualifiers::FastMask)
790  && "non-fast qualifier bits set in mask!");
791  Value.setInt(Value.getInt() | TQs);
792  }
793 
794  void removeLocalConst();
795  void removeLocalVolatile();
796  void removeLocalRestrict();
797  void removeLocalCVRQualifiers(unsigned Mask);
798 
799  void removeLocalFastQualifiers() { Value.setInt(0); }
800  void removeLocalFastQualifiers(unsigned Mask) {
801  assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers");
802  Value.setInt(Value.getInt() & ~Mask);
803  }
804 
805  // Creates a type with the given qualifiers in addition to any
806  // qualifiers already on this type.
807  QualType withFastQualifiers(unsigned TQs) const {
808  QualType T = *this;
809  T.addFastQualifiers(TQs);
810  return T;
811  }
812 
813  // Creates a type with exactly the given fast qualifiers, removing
814  // any existing fast qualifiers.
816  return withoutLocalFastQualifiers().withFastQualifiers(TQs);
817  }
818 
819  // Removes fast qualifiers, but leaves any extended qualifiers in place.
821  QualType T = *this;
823  return T;
824  }
825 
826  QualType getCanonicalType() const;
827 
828  /// \brief Return this type with all of the instance-specific qualifiers
829  /// removed, but without removing any qualifiers that may have been applied
830  /// through typedefs.
831  QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); }
832 
833  /// \brief Retrieve the unqualified variant of the given type,
834  /// removing as little sugar as possible.
835  ///
836  /// This routine looks through various kinds of sugar to find the
837  /// least-desugared type that is unqualified. For example, given:
838  ///
839  /// \code
840  /// typedef int Integer;
841  /// typedef const Integer CInteger;
842  /// typedef CInteger DifferenceType;
843  /// \endcode
844  ///
845  /// Executing \c getUnqualifiedType() on the type \c DifferenceType will
846  /// desugar until we hit the type \c Integer, which has no qualifiers on it.
847  ///
848  /// The resulting type might still be qualified if it's sugar for an array
849  /// type. To strip qualifiers even from within a sugared array type, use
850  /// ASTContext::getUnqualifiedArrayType.
851  inline QualType getUnqualifiedType() const;
852 
853  /// Retrieve the unqualified variant of the given type, removing as little
854  /// sugar as possible.
855  ///
856  /// Like getUnqualifiedType(), but also returns the set of
857  /// qualifiers that were built up.
858  ///
859  /// The resulting type might still be qualified if it's sugar for an array
860  /// type. To strip qualifiers even from within a sugared array type, use
861  /// ASTContext::getUnqualifiedArrayType.
862  inline SplitQualType getSplitUnqualifiedType() const;
863 
864  /// \brief Determine whether this type is more qualified than the other
865  /// given type, requiring exact equality for non-CVR qualifiers.
866  bool isMoreQualifiedThan(QualType Other) const;
867 
868  /// \brief Determine whether this type is at least as qualified as the other
869  /// given type, requiring exact equality for non-CVR qualifiers.
870  bool isAtLeastAsQualifiedAs(QualType Other) const;
871 
872  QualType getNonReferenceType() const;
873 
874  /// \brief Determine the type of a (typically non-lvalue) expression with the
875  /// specified result type.
876  ///
877  /// This routine should be used for expressions for which the return type is
878  /// explicitly specified (e.g., in a cast or call) and isn't necessarily
879  /// an lvalue. It removes a top-level reference (since there are no
880  /// expressions of reference type) and deletes top-level cvr-qualifiers
881  /// from non-class types (in C++) or all types (in C).
882  QualType getNonLValueExprType(const ASTContext &Context) const;
883 
884  /// Return the specified type with any "sugar" removed from
885  /// the type. This takes off typedefs, typeof's etc. If the outer level of
886  /// the type is already concrete, it returns it unmodified. This is similar
887  /// to getting the canonical type, but it doesn't remove *all* typedefs. For
888  /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
889  /// concrete.
890  ///
891  /// Qualifiers are left in place.
893  return getDesugaredType(*this, Context);
894  }
895 
897  return getSplitDesugaredType(*this);
898  }
899 
900  /// \brief Return the specified type with one level of "sugar" removed from
901  /// the type.
902  ///
903  /// This routine takes off the first typedef, typeof, etc. If the outer level
904  /// of the type is already concrete, it returns it unmodified.
906  return getSingleStepDesugaredTypeImpl(*this, Context);
907  }
908 
909  /// Returns the specified type after dropping any
910  /// outer-level parentheses.
912  if (isa<ParenType>(*this))
913  return QualType::IgnoreParens(*this);
914  return *this;
915  }
916 
917  /// Indicate whether the specified types and qualifiers are identical.
918  friend bool operator==(const QualType &LHS, const QualType &RHS) {
919  return LHS.Value == RHS.Value;
920  }
921  friend bool operator!=(const QualType &LHS, const QualType &RHS) {
922  return LHS.Value != RHS.Value;
923  }
924  std::string getAsString() const {
925  return getAsString(split());
926  }
927  static std::string getAsString(SplitQualType split) {
928  return getAsString(split.Ty, split.Quals);
929  }
930  static std::string getAsString(const Type *ty, Qualifiers qs);
931 
932  std::string getAsString(const PrintingPolicy &Policy) const;
933 
934  void print(raw_ostream &OS, const PrintingPolicy &Policy,
935  const Twine &PlaceHolder = Twine(),
936  unsigned Indentation = 0) const {
937  print(split(), OS, Policy, PlaceHolder, Indentation);
938  }
939  static void print(SplitQualType split, raw_ostream &OS,
940  const PrintingPolicy &policy, const Twine &PlaceHolder,
941  unsigned Indentation = 0) {
942  return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation);
943  }
944  static void print(const Type *ty, Qualifiers qs,
945  raw_ostream &OS, const PrintingPolicy &policy,
946  const Twine &PlaceHolder,
947  unsigned Indentation = 0);
948 
949  void getAsStringInternal(std::string &Str,
950  const PrintingPolicy &Policy) const {
951  return getAsStringInternal(split(), Str, Policy);
952  }
953  static void getAsStringInternal(SplitQualType split, std::string &out,
954  const PrintingPolicy &policy) {
955  return getAsStringInternal(split.Ty, split.Quals, out, policy);
956  }
957  static void getAsStringInternal(const Type *ty, Qualifiers qs,
958  std::string &out,
959  const PrintingPolicy &policy);
960 
962  const QualType &T;
963  const PrintingPolicy &Policy;
964  const Twine &PlaceHolder;
965  unsigned Indentation;
966  public:
968  const Twine &PlaceHolder, unsigned Indentation)
969  : T(T), Policy(Policy), PlaceHolder(PlaceHolder),
970  Indentation(Indentation) { }
971 
972  friend raw_ostream &operator<<(raw_ostream &OS,
973  const StreamedQualTypeHelper &SQT) {
974  SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation);
975  return OS;
976  }
977  };
978 
980  const Twine &PlaceHolder = Twine(),
981  unsigned Indentation = 0) const {
982  return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation);
983  }
984 
985  void dump(const char *s) const;
986  void dump() const;
987 
988  void Profile(llvm::FoldingSetNodeID &ID) const {
989  ID.AddPointer(getAsOpaquePtr());
990  }
991 
992  /// Return the address space of this type.
993  inline unsigned getAddressSpace() const;
994 
995  /// Returns gc attribute of this type.
996  inline Qualifiers::GC getObjCGCAttr() const;
997 
998  /// true when Type is objc's weak.
999  bool isObjCGCWeak() const {
1000  return getObjCGCAttr() == Qualifiers::Weak;
1001  }
1002 
1003  /// true when Type is objc's strong.
1004  bool isObjCGCStrong() const {
1005  return getObjCGCAttr() == Qualifiers::Strong;
1006  }
1007 
1008  /// Returns lifetime attribute of this type.
1010  return getQualifiers().getObjCLifetime();
1011  }
1012 
1014  return getQualifiers().hasNonTrivialObjCLifetime();
1015  }
1016 
1018  return getQualifiers().hasStrongOrWeakObjCLifetime();
1019  }
1020 
1025  DK_objc_weak_lifetime
1026  };
1027 
1028  /// Returns a nonzero value if objects of this type require
1029  /// non-trivial work to clean up after. Non-zero because it's
1030  /// conceivable that qualifiers (objc_gc(weak)?) could make
1031  /// something require destruction.
1033  return isDestructedTypeImpl(*this);
1034  }
1035 
1036  /// Determine whether expressions of the given type are forbidden
1037  /// from being lvalues in C.
1038  ///
1039  /// The expression types that are forbidden to be lvalues are:
1040  /// - 'void', but not qualified void
1041  /// - function types
1042  ///
1043  /// The exact rule here is C99 6.3.2.1:
1044  /// An lvalue is an expression with an object type or an incomplete
1045  /// type other than void.
1046  bool isCForbiddenLValueType() const;
1047 
1048  /// Substitute type arguments for the Objective-C type parameters used in the
1049  /// subject type.
1050  ///
1051  /// \param ctx ASTContext in which the type exists.
1052  ///
1053  /// \param typeArgs The type arguments that will be substituted for the
1054  /// Objective-C type parameters in the subject type, which are generally
1055  /// computed via \c Type::getObjCSubstitutions. If empty, the type
1056  /// parameters will be replaced with their bounds or id/Class, as appropriate
1057  /// for the context.
1058  ///
1059  /// \param context The context in which the subject type was written.
1060  ///
1061  /// \returns the resulting type.
1062  QualType substObjCTypeArgs(ASTContext &ctx,
1063  ArrayRef<QualType> typeArgs,
1064  ObjCSubstitutionContext context) const;
1065 
1066  /// Substitute type arguments from an object type for the Objective-C type
1067  /// parameters used in the subject type.
1068  ///
1069  /// This operation combines the computation of type arguments for
1070  /// substitution (\c Type::getObjCSubstitutions) with the actual process of
1071  /// substitution (\c QualType::substObjCTypeArgs) for the convenience of
1072  /// callers that need to perform a single substitution in isolation.
1073  ///
1074  /// \param objectType The type of the object whose member type we're
1075  /// substituting into. For example, this might be the receiver of a message
1076  /// or the base of a property access.
1077  ///
1078  /// \param dc The declaration context from which the subject type was
1079  /// retrieved, which indicates (for example) which type parameters should
1080  /// be substituted.
1081  ///
1082  /// \param context The context in which the subject type was written.
1083  ///
1084  /// \returns the subject type after replacing all of the Objective-C type
1085  /// parameters with their corresponding arguments.
1086  QualType substObjCMemberType(QualType objectType,
1087  const DeclContext *dc,
1088  ObjCSubstitutionContext context) const;
1089 
1090  /// Strip Objective-C "__kindof" types from the given type.
1091  QualType stripObjCKindOfType(const ASTContext &ctx) const;
1092 
1093  /// Remove all qualifiers including _Atomic.
1094  QualType getAtomicUnqualifiedType() const;
1095 
1096 private:
1097  // These methods are implemented in a separate translation unit;
1098  // "static"-ize them to avoid creating temporary QualTypes in the
1099  // caller.
1100  static bool isConstant(QualType T, const ASTContext& Ctx);
1101  static QualType getDesugaredType(QualType T, const ASTContext &Context);
1102  static SplitQualType getSplitDesugaredType(QualType T);
1103  static SplitQualType getSplitUnqualifiedTypeImpl(QualType type);
1104  static QualType getSingleStepDesugaredTypeImpl(QualType type,
1105  const ASTContext &C);
1106  static QualType IgnoreParens(QualType T);
1107  static DestructionKind isDestructedTypeImpl(QualType type);
1108 };
1109 
1110 } // end clang.
1111 
1112 namespace llvm {
1113 /// Implement simplify_type for QualType, so that we can dyn_cast from QualType
1114 /// to a specific Type class.
1115 template<> struct simplify_type< ::clang::QualType> {
1116  typedef const ::clang::Type *SimpleType;
1117  static SimpleType getSimplifiedValue(::clang::QualType Val) {
1118  return Val.getTypePtr();
1119  }
1120 };
1121 
1122 // Teach SmallPtrSet that QualType is "basically a pointer".
1123 template<>
1124 class PointerLikeTypeTraits<clang::QualType> {
1125 public:
1126  static inline void *getAsVoidPointer(clang::QualType P) {
1127  return P.getAsOpaquePtr();
1128  }
1129  static inline clang::QualType getFromVoidPointer(void *P) {
1131  }
1132  // Various qualifiers go in low bits.
1133  enum { NumLowBitsAvailable = 0 };
1134 };
1135 
1136 } // end namespace llvm
1137 
1138 namespace clang {
1139 
1140 /// \brief Base class that is common to both the \c ExtQuals and \c Type
1141 /// classes, which allows \c QualType to access the common fields between the
1142 /// two.
1143 ///
1145  ExtQualsTypeCommonBase(const Type *baseType, QualType canon)
1146  : BaseType(baseType), CanonicalType(canon) {}
1147 
1148  /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or
1149  /// a self-referential pointer (for \c Type).
1150  ///
1151  /// This pointer allows an efficient mapping from a QualType to its
1152  /// underlying type pointer.
1153  const Type *const BaseType;
1154 
1155  /// \brief The canonical type of this type. A QualType.
1156  QualType CanonicalType;
1157 
1158  friend class QualType;
1159  friend class Type;
1160  friend class ExtQuals;
1161 };
1162 
1163 /// We can encode up to four bits in the low bits of a
1164 /// type pointer, but there are many more type qualifiers that we want
1165 /// to be able to apply to an arbitrary type. Therefore we have this
1166 /// struct, intended to be heap-allocated and used by QualType to
1167 /// store qualifiers.
1168 ///
1169 /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers
1170 /// in three low bits on the QualType pointer; a fourth bit records whether
1171 /// the pointer is an ExtQuals node. The extended qualifiers (address spaces,
1172 /// Objective-C GC attributes) are much more rare.
1173 class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode {
1174  // NOTE: changing the fast qualifiers should be straightforward as
1175  // long as you don't make 'const' non-fast.
1176  // 1. Qualifiers:
1177  // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ).
1178  // Fast qualifiers must occupy the low-order bits.
1179  // b) Update Qualifiers::FastWidth and FastMask.
1180  // 2. QualType:
1181  // a) Update is{Volatile,Restrict}Qualified(), defined inline.
1182  // b) Update remove{Volatile,Restrict}, defined near the end of
1183  // this header.
1184  // 3. ASTContext:
1185  // a) Update get{Volatile,Restrict}Type.
1186 
1187  /// The immutable set of qualifiers applied by this node. Always contains
1188  /// extended qualifiers.
1189  Qualifiers Quals;
1190 
1191  ExtQuals *this_() { return this; }
1192 
1193 public:
1194  ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
1195  : ExtQualsTypeCommonBase(baseType,
1196  canon.isNull() ? QualType(this_(), 0) : canon),
1197  Quals(quals)
1198  {
1199  assert(Quals.hasNonFastQualifiers()
1200  && "ExtQuals created with no fast qualifiers");
1201  assert(!Quals.hasFastQualifiers()
1202  && "ExtQuals created with fast qualifiers");
1203  }
1204 
1205  Qualifiers getQualifiers() const { return Quals; }
1206 
1207  bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); }
1208  Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); }
1209 
1210  bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); }
1212  return Quals.getObjCLifetime();
1213  }
1214 
1215  bool hasAddressSpace() const { return Quals.hasAddressSpace(); }
1216  unsigned getAddressSpace() const { return Quals.getAddressSpace(); }
1217 
1218  const Type *getBaseType() const { return BaseType; }
1219 
1220 public:
1221  void Profile(llvm::FoldingSetNodeID &ID) const {
1222  Profile(ID, getBaseType(), Quals);
1223  }
1224  static void Profile(llvm::FoldingSetNodeID &ID,
1225  const Type *BaseType,
1226  Qualifiers Quals) {
1227  assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!");
1228  ID.AddPointer(BaseType);
1229  Quals.Profile(ID);
1230  }
1231 };
1232 
1233 /// The kind of C++11 ref-qualifier associated with a function type.
1234 /// This determines whether a member function's "this" object can be an
1235 /// lvalue, rvalue, or neither.
1237  /// \brief No ref-qualifier was provided.
1238  RQ_None = 0,
1239  /// \brief An lvalue ref-qualifier was provided (\c &).
1241  /// \brief An rvalue ref-qualifier was provided (\c &&).
1243 };
1244 
1245 /// Which keyword(s) were used to create an AutoType.
1246 enum class AutoTypeKeyword {
1247  /// \brief auto
1248  Auto,
1249  /// \brief decltype(auto)
1250  DecltypeAuto,
1251  /// \brief __auto_type (GNU extension)
1252  GNUAutoType
1253 };
1254 
1255 /// The base class of the type hierarchy.
1256 ///
1257 /// A central concept with types is that each type always has a canonical
1258 /// type. A canonical type is the type with any typedef names stripped out
1259 /// of it or the types it references. For example, consider:
1260 ///
1261 /// typedef int foo;
1262 /// typedef foo* bar;
1263 /// 'int *' 'foo *' 'bar'
1264 ///
1265 /// There will be a Type object created for 'int'. Since int is canonical, its
1266 /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a
1267 /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next
1268 /// there is a PointerType that represents 'int*', which, like 'int', is
1269 /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical
1270 /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type
1271 /// is also 'int*'.
1272 ///
1273 /// Non-canonical types are useful for emitting diagnostics, without losing
1274 /// information about typedefs being used. Canonical types are useful for type
1275 /// comparisons (they allow by-pointer equality tests) and useful for reasoning
1276 /// about whether something has a particular form (e.g. is a function type),
1277 /// because they implicitly, recursively, strip all typedefs out of a type.
1278 ///
1279 /// Types, once created, are immutable.
1280 ///
1282 public:
1283  enum TypeClass {
1284 #define TYPE(Class, Base) Class,
1285 #define LAST_TYPE(Class) TypeLast = Class,
1286 #define ABSTRACT_TYPE(Class, Base)
1287 #include "clang/AST/TypeNodes.def"
1288  TagFirst = Record, TagLast = Enum
1289  };
1290 
1291 private:
1292  Type(const Type &) = delete;
1293  void operator=(const Type &) = delete;
1294 
1295  /// Bitfields required by the Type class.
1296  class TypeBitfields {
1297  friend class Type;
1298  template <class T> friend class TypePropertyCache;
1299 
1300  /// TypeClass bitfield - Enum that specifies what subclass this belongs to.
1301  unsigned TC : 8;
1302 
1303  /// Whether this type is a dependent type (C++ [temp.dep.type]).
1304  unsigned Dependent : 1;
1305 
1306  /// Whether this type somehow involves a template parameter, even
1307  /// if the resolution of the type does not depend on a template parameter.
1308  unsigned InstantiationDependent : 1;
1309 
1310  /// Whether this type is a variably-modified type (C99 6.7.5).
1311  unsigned VariablyModified : 1;
1312 
1313  /// \brief Whether this type contains an unexpanded parameter pack
1314  /// (for C++11 variadic templates).
1315  unsigned ContainsUnexpandedParameterPack : 1;
1316 
1317  /// \brief True if the cache (i.e. the bitfields here starting with
1318  /// 'Cache') is valid.
1319  mutable unsigned CacheValid : 1;
1320 
1321  /// \brief Linkage of this type.
1322  mutable unsigned CachedLinkage : 3;
1323 
1324  /// \brief Whether this type involves and local or unnamed types.
1325  mutable unsigned CachedLocalOrUnnamed : 1;
1326 
1327  /// \brief Whether this type comes from an AST file.
1328  mutable unsigned FromAST : 1;
1329 
1330  bool isCacheValid() const {
1331  return CacheValid;
1332  }
1333  Linkage getLinkage() const {
1334  assert(isCacheValid() && "getting linkage from invalid cache");
1335  return static_cast<Linkage>(CachedLinkage);
1336  }
1337  bool hasLocalOrUnnamedType() const {
1338  assert(isCacheValid() && "getting linkage from invalid cache");
1339  return CachedLocalOrUnnamed;
1340  }
1341  };
1342  enum { NumTypeBits = 18 };
1343 
1344 protected:
1345  // These classes allow subclasses to somewhat cleanly pack bitfields
1346  // into Type.
1347 
1349  friend class ArrayType;
1350 
1351  unsigned : NumTypeBits;
1352 
1353  /// CVR qualifiers from declarations like
1354  /// 'int X[static restrict 4]'. For function parameters only.
1355  unsigned IndexTypeQuals : 3;
1356 
1357  /// Storage class qualifiers from declarations like
1358  /// 'int X[static restrict 4]'. For function parameters only.
1359  /// Actually an ArrayType::ArraySizeModifier.
1360  unsigned SizeModifier : 3;
1361  };
1362 
1364  friend class BuiltinType;
1365 
1366  unsigned : NumTypeBits;
1367 
1368  /// The kind (BuiltinType::Kind) of builtin type this is.
1369  unsigned Kind : 8;
1370  };
1371 
1373  friend class FunctionType;
1374  friend class FunctionProtoType;
1375 
1376  unsigned : NumTypeBits;
1377 
1378  /// Extra information which affects how the function is called, like
1379  /// regparm and the calling convention.
1380  unsigned ExtInfo : 9;
1381 
1382  /// Used only by FunctionProtoType, put here to pack with the
1383  /// other bitfields.
1384  /// The qualifiers are part of FunctionProtoType because...
1385  ///
1386  /// C++ 8.3.5p4: The return type, the parameter type list and the
1387  /// cv-qualifier-seq, [...], are part of the function type.
1388  unsigned TypeQuals : 4;
1389 
1390  /// \brief The ref-qualifier associated with a \c FunctionProtoType.
1391  ///
1392  /// This is a value of type \c RefQualifierKind.
1393  unsigned RefQualifier : 2;
1394  };
1395 
1397  friend class ObjCObjectType;
1398 
1399  unsigned : NumTypeBits;
1400 
1401  /// The number of type arguments stored directly on this object type.
1402  unsigned NumTypeArgs : 7;
1403 
1404  /// The number of protocols stored directly on this object type.
1405  unsigned NumProtocols : 6;
1406 
1407  /// Whether this is a "kindof" type.
1408  unsigned IsKindOf : 1;
1409  };
1410  static_assert(NumTypeBits + 7 + 6 + 1 <= 32, "Does not fit in an unsigned");
1411 
1413  friend class ReferenceType;
1414 
1415  unsigned : NumTypeBits;
1416 
1417  /// True if the type was originally spelled with an lvalue sigil.
1418  /// This is never true of rvalue references but can also be false
1419  /// on lvalue references because of C++0x [dcl.typedef]p9,
1420  /// as follows:
1421  ///
1422  /// typedef int &ref; // lvalue, spelled lvalue
1423  /// typedef int &&rvref; // rvalue
1424  /// ref &a; // lvalue, inner ref, spelled lvalue
1425  /// ref &&a; // lvalue, inner ref
1426  /// rvref &a; // lvalue, inner ref, spelled lvalue
1427  /// rvref &&a; // rvalue, inner ref
1428  unsigned SpelledAsLValue : 1;
1429 
1430  /// True if the inner type is a reference type. This only happens
1431  /// in non-canonical forms.
1432  unsigned InnerRef : 1;
1433  };
1434 
1436  friend class TypeWithKeyword;
1437 
1438  unsigned : NumTypeBits;
1439 
1440  /// An ElaboratedTypeKeyword. 8 bits for efficient access.
1441  unsigned Keyword : 8;
1442  };
1443 
1445  friend class VectorType;
1446 
1447  unsigned : NumTypeBits;
1448 
1449  /// The kind of vector, either a generic vector type or some
1450  /// target-specific vector type such as for AltiVec or Neon.
1451  unsigned VecKind : 3;
1452 
1453  /// The number of elements in the vector.
1454  unsigned NumElements : 29 - NumTypeBits;
1455 
1456  enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 };
1457  };
1458 
1460  friend class AttributedType;
1461 
1462  unsigned : NumTypeBits;
1463 
1464  /// An AttributedType::Kind
1465  unsigned AttrKind : 32 - NumTypeBits;
1466  };
1467 
1469  friend class AutoType;
1470 
1471  unsigned : NumTypeBits;
1472 
1473  /// Was this placeholder type spelled as 'auto', 'decltype(auto)',
1474  /// or '__auto_type'? AutoTypeKeyword value.
1475  unsigned Keyword : 2;
1476  };
1477 
1478  union {
1479  TypeBitfields TypeBits;
1489  };
1490 
1491 private:
1492  /// \brief Set whether this type comes from an AST file.
1493  void setFromAST(bool V = true) const {
1494  TypeBits.FromAST = V;
1495  }
1496 
1497  template <class T> friend class TypePropertyCache;
1498 
1499 protected:
1500  // silence VC++ warning C4355: 'this' : used in base member initializer list
1501  Type *this_() { return this; }
1502  Type(TypeClass tc, QualType canon, bool Dependent,
1503  bool InstantiationDependent, bool VariablyModified,
1504  bool ContainsUnexpandedParameterPack)
1505  : ExtQualsTypeCommonBase(this,
1506  canon.isNull() ? QualType(this_(), 0) : canon) {
1507  TypeBits.TC = tc;
1508  TypeBits.Dependent = Dependent;
1509  TypeBits.InstantiationDependent = Dependent || InstantiationDependent;
1510  TypeBits.VariablyModified = VariablyModified;
1511  TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack;
1512  TypeBits.CacheValid = false;
1513  TypeBits.CachedLocalOrUnnamed = false;
1514  TypeBits.CachedLinkage = NoLinkage;
1515  TypeBits.FromAST = false;
1516  }
1517  friend class ASTContext;
1518 
1519  void setDependent(bool D = true) {
1520  TypeBits.Dependent = D;
1521  if (D)
1522  TypeBits.InstantiationDependent = true;
1523  }
1524  void setInstantiationDependent(bool D = true) {
1525  TypeBits.InstantiationDependent = D; }
1526  void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM;
1527  }
1528  void setContainsUnexpandedParameterPack(bool PP = true) {
1529  TypeBits.ContainsUnexpandedParameterPack = PP;
1530  }
1531 
1532 public:
1533  TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); }
1534 
1535  /// \brief Whether this type comes from an AST file.
1536  bool isFromAST() const { return TypeBits.FromAST; }
1537 
1538  /// \brief Whether this type is or contains an unexpanded parameter
1539  /// pack, used to support C++0x variadic templates.
1540  ///
1541  /// A type that contains a parameter pack shall be expanded by the
1542  /// ellipsis operator at some point. For example, the typedef in the
1543  /// following example contains an unexpanded parameter pack 'T':
1544  ///
1545  /// \code
1546  /// template<typename ...T>
1547  /// struct X {
1548  /// typedef T* pointer_types; // ill-formed; T is a parameter pack.
1549  /// };
1550  /// \endcode
1551  ///
1552  /// Note that this routine does not specify which
1554  return TypeBits.ContainsUnexpandedParameterPack;
1555  }
1556 
1557  /// Determines if this type would be canonical if it had no further
1558  /// qualification.
1559  bool isCanonicalUnqualified() const {
1560  return CanonicalType == QualType(this, 0);
1561  }
1562 
1563  /// Pull a single level of sugar off of this locally-unqualified type.
1564  /// Users should generally prefer SplitQualType::getSingleStepDesugaredType()
1565  /// or QualType::getSingleStepDesugaredType(const ASTContext&).
1567 
1568  /// Types are partitioned into 3 broad categories (C99 6.2.5p1):
1569  /// object types, function types, and incomplete types.
1570 
1571  /// Return true if this is an incomplete type.
1572  /// A type that can describe objects, but which lacks information needed to
1573  /// determine its size (e.g. void, or a fwd declared struct). Clients of this
1574  /// routine will need to determine if the size is actually required.
1575  ///
1576  /// \brief Def If non-null, and the type refers to some kind of declaration
1577  /// that can be completed (such as a C struct, C++ class, or Objective-C
1578  /// class), will be set to the declaration.
1579  bool isIncompleteType(NamedDecl **Def = nullptr) const;
1580 
1581  /// Return true if this is an incomplete or object
1582  /// type, in other words, not a function type.
1584  return !isFunctionType();
1585  }
1586 
1587  /// \brief Determine whether this type is an object type.
1588  bool isObjectType() const {
1589  // C++ [basic.types]p8:
1590  // An object type is a (possibly cv-qualified) type that is not a
1591  // function type, not a reference type, and not a void type.
1592  return !isReferenceType() && !isFunctionType() && !isVoidType();
1593  }
1594 
1595  /// Return true if this is a literal type
1596  /// (C++11 [basic.types]p10)
1597  bool isLiteralType(const ASTContext &Ctx) const;
1598 
1599  /// Test if this type is a standard-layout type.
1600  /// (C++0x [basic.type]p9)
1601  bool isStandardLayoutType() const;
1602 
1603  /// Helper methods to distinguish type categories. All type predicates
1604  /// operate on the canonical type, ignoring typedefs and qualifiers.
1605 
1606  /// Returns true if the type is a builtin type.
1607  bool isBuiltinType() const;
1608 
1609  /// Test for a particular builtin type.
1610  bool isSpecificBuiltinType(unsigned K) const;
1611 
1612  /// Test for a type which does not represent an actual type-system type but
1613  /// is instead used as a placeholder for various convenient purposes within
1614  /// Clang. All such types are BuiltinTypes.
1615  bool isPlaceholderType() const;
1616  const BuiltinType *getAsPlaceholderType() const;
1617 
1618  /// Test for a specific placeholder type.
1619  bool isSpecificPlaceholderType(unsigned K) const;
1620 
1621  /// Test for a placeholder type other than Overload; see
1622  /// BuiltinType::isNonOverloadPlaceholderType.
1623  bool isNonOverloadPlaceholderType() const;
1624 
1625  /// isIntegerType() does *not* include complex integers (a GCC extension).
1626  /// isComplexIntegerType() can be used to test for complex integers.
1627  bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum)
1628  bool isEnumeralType() const;
1629  bool isBooleanType() const;
1630  bool isCharType() const;
1631  bool isWideCharType() const;
1632  bool isChar16Type() const;
1633  bool isChar32Type() const;
1634  bool isAnyCharacterType() const;
1635  bool isIntegralType(const ASTContext &Ctx) const;
1636 
1637  /// Determine whether this type is an integral or enumeration type.
1638  bool isIntegralOrEnumerationType() const;
1639  /// Determine whether this type is an integral or unscoped enumeration type.
1641 
1642  /// Floating point categories.
1643  bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double)
1644  /// isComplexType() does *not* include complex integers (a GCC extension).
1645  /// isComplexIntegerType() can be used to test for complex integers.
1646  bool isComplexType() const; // C99 6.2.5p11 (complex)
1647  bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int.
1648  bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex)
1649  bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half)
1650  bool isRealType() const; // C99 6.2.5p17 (real floating + integer)
1651  bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating)
1652  bool isVoidType() const; // C99 6.2.5p19
1653  bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers)
1654  bool isAggregateType() const;
1655  bool isFundamentalType() const;
1656  bool isCompoundType() const;
1657 
1658  // Type Predicates: Check to see if this type is structurally the specified
1659  // type, ignoring typedefs and qualifiers.
1660  bool isFunctionType() const;
1661  bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); }
1662  bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); }
1663  bool isPointerType() const;
1664  bool isAnyPointerType() const; // Any C pointer or ObjC object pointer
1665  bool isBlockPointerType() const;
1666  bool isVoidPointerType() const;
1667  bool isReferenceType() const;
1668  bool isLValueReferenceType() const;
1669  bool isRValueReferenceType() const;
1670  bool isFunctionPointerType() const;
1671  bool isMemberPointerType() const;
1672  bool isMemberFunctionPointerType() const;
1673  bool isMemberDataPointerType() const;
1674  bool isArrayType() const;
1675  bool isConstantArrayType() const;
1676  bool isIncompleteArrayType() const;
1677  bool isVariableArrayType() const;
1678  bool isDependentSizedArrayType() const;
1679  bool isRecordType() const;
1680  bool isClassType() const;
1681  bool isStructureType() const;
1682  bool isObjCBoxableRecordType() const;
1683  bool isInterfaceType() const;
1684  bool isStructureOrClassType() const;
1685  bool isUnionType() const;
1686  bool isComplexIntegerType() const; // GCC _Complex integer type.
1687  bool isVectorType() const; // GCC vector type.
1688  bool isExtVectorType() const; // Extended vector type.
1689  bool isObjCObjectPointerType() const; // pointer to ObjC object
1690  bool isObjCRetainableType() const; // ObjC object or block pointer
1691  bool isObjCLifetimeType() const; // (array of)* retainable type
1692  bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type
1693  bool isObjCNSObjectType() const; // __attribute__((NSObject))
1694  bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class))
1695  // FIXME: change this to 'raw' interface type, so we can used 'interface' type
1696  // for the common case.
1697  bool isObjCObjectType() const; // NSString or typeof(*(id)0)
1698  bool isObjCQualifiedInterfaceType() const; // NSString<foo>
1699  bool isObjCQualifiedIdType() const; // id<foo>
1700  bool isObjCQualifiedClassType() const; // Class<foo>
1701  bool isObjCObjectOrInterfaceType() const;
1702  bool isObjCIdType() const; // id
1703  bool isObjCInertUnsafeUnretainedType() const;
1704 
1705  /// Whether the type is Objective-C 'id' or a __kindof type of an
1706  /// object type, e.g., __kindof NSView * or __kindof id
1707  /// <NSCopying>.
1708  ///
1709  /// \param bound Will be set to the bound on non-id subtype types,
1710  /// which will be (possibly specialized) Objective-C class type, or
1711  /// null for 'id.
1712  bool isObjCIdOrObjectKindOfType(const ASTContext &ctx,
1713  const ObjCObjectType *&bound) const;
1714 
1715  bool isObjCClassType() const; // Class
1716 
1717  /// Whether the type is Objective-C 'Class' or a __kindof type of an
1718  /// Class type, e.g., __kindof Class <NSCopying>.
1719  ///
1720  /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound
1721  /// here because Objective-C's type system cannot express "a class
1722  /// object for a subclass of NSFoo".
1723  bool isObjCClassOrClassKindOfType() const;
1724 
1726  bool isObjCSelType() const; // Class
1727  bool isObjCBuiltinType() const; // 'id' or 'Class'
1728  bool isObjCARCBridgableType() const;
1729  bool isCARCBridgableType() const;
1730  bool isTemplateTypeParmType() const; // C++ template type parameter
1731  bool isNullPtrType() const; // C++0x nullptr_t
1732  bool isAtomicType() const; // C11 _Atomic()
1733 
1734 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
1735  bool is##Id##Type() const;
1736 #include "clang/Basic/OpenCLImageTypes.def"
1737 
1738  bool isImageType() const; // Any OpenCL image type
1739 
1740  bool isSamplerT() const; // OpenCL sampler_t
1741  bool isEventT() const; // OpenCL event_t
1742  bool isClkEventT() const; // OpenCL clk_event_t
1743  bool isQueueT() const; // OpenCL queue_t
1744  bool isNDRangeT() const; // OpenCL ndrange_t
1745  bool isReserveIDT() const; // OpenCL reserve_id_t
1746 
1747  bool isPipeType() const; // OpenCL pipe type
1748  bool isOpenCLSpecificType() const; // Any OpenCL specific type
1749 
1750  /// Determines if this type, which must satisfy
1751  /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
1752  /// than implicitly __strong.
1753  bool isObjCARCImplicitlyUnretainedType() const;
1754 
1755  /// Return the implicit lifetime for this type, which must not be dependent.
1757 
1768  };
1769  /// Given that this is a scalar type, classify it.
1771 
1772  /// Whether this type is a dependent type, meaning that its definition
1773  /// somehow depends on a template parameter (C++ [temp.dep.type]).
1774  bool isDependentType() const { return TypeBits.Dependent; }
1775 
1776  /// \brief Determine whether this type is an instantiation-dependent type,
1777  /// meaning that the type involves a template parameter (even if the
1778  /// definition does not actually depend on the type substituted for that
1779  /// template parameter).
1781  return TypeBits.InstantiationDependent;
1782  }
1783 
1784  /// \brief Determine whether this type is an undeduced type, meaning that
1785  /// it somehow involves a C++11 'auto' type which has not yet been deduced.
1786  bool isUndeducedType() const;
1787 
1788  /// \brief Whether this type is a variably-modified type (C99 6.7.5).
1789  bool isVariablyModifiedType() const { return TypeBits.VariablyModified; }
1790 
1791  /// \brief Whether this type involves a variable-length array type
1792  /// with a definite size.
1793  bool hasSizedVLAType() const;
1794 
1795  /// \brief Whether this type is or contains a local or unnamed type.
1796  bool hasUnnamedOrLocalType() const;
1797 
1798  bool isOverloadableType() const;
1799 
1800  /// \brief Determine wither this type is a C++ elaborated-type-specifier.
1801  bool isElaboratedTypeSpecifier() const;
1802 
1803  bool canDecayToPointerType() const;
1804 
1805  /// Whether this type is represented natively as a pointer. This includes
1806  /// pointers, references, block pointers, and Objective-C interface,
1807  /// qualified id, and qualified interface types, as well as nullptr_t.
1808  bool hasPointerRepresentation() const;
1809 
1810  /// Whether this type can represent an objective pointer type for the
1811  /// purpose of GC'ability
1812  bool hasObjCPointerRepresentation() const;
1813 
1814  /// \brief Determine whether this type has an integer representation
1815  /// of some sort, e.g., it is an integer type or a vector.
1816  bool hasIntegerRepresentation() const;
1817 
1818  /// \brief Determine whether this type has an signed integer representation
1819  /// of some sort, e.g., it is an signed integer type or a vector.
1820  bool hasSignedIntegerRepresentation() const;
1821 
1822  /// \brief Determine whether this type has an unsigned integer representation
1823  /// of some sort, e.g., it is an unsigned integer type or a vector.
1824  bool hasUnsignedIntegerRepresentation() const;
1825 
1826  /// \brief Determine whether this type has a floating-point representation
1827  /// of some sort, e.g., it is a floating-point type or a vector thereof.
1828  bool hasFloatingRepresentation() const;
1829 
1830  // Type Checking Functions: Check to see if this type is structurally the
1831  // specified type, ignoring typedefs and qualifiers, and return a pointer to
1832  // the best type we can.
1833  const RecordType *getAsStructureType() const;
1834  /// NOTE: getAs*ArrayType are methods on ASTContext.
1835  const RecordType *getAsUnionType() const;
1836  const ComplexType *getAsComplexIntegerType() const; // GCC complex int type.
1837  const ObjCObjectType *getAsObjCInterfaceType() const;
1838  // The following is a convenience method that returns an ObjCObjectPointerType
1839  // for object declared using an interface.
1844 
1845  /// \brief Retrieves the CXXRecordDecl that this type refers to, either
1846  /// because the type is a RecordType or because it is the injected-class-name
1847  /// type of a class template or class template partial specialization.
1849 
1850  /// \brief Retrieves the TagDecl that this type refers to, either
1851  /// because the type is a TagType or because it is the injected-class-name
1852  /// type of a class template or class template partial specialization.
1853  TagDecl *getAsTagDecl() const;
1854 
1855  /// If this is a pointer or reference to a RecordType, return the
1856  /// CXXRecordDecl that that type refers to.
1857  ///
1858  /// If this is not a pointer or reference, or the type being pointed to does
1859  /// not refer to a CXXRecordDecl, returns NULL.
1860  const CXXRecordDecl *getPointeeCXXRecordDecl() const;
1861 
1862  /// Get the AutoType whose type will be deduced for a variable with
1863  /// an initializer of this type. This looks through declarators like pointer
1864  /// types, but not through decltype or typedefs.
1865  AutoType *getContainedAutoType() const;
1866 
1867  /// Member-template getAs<specific type>'. Look through sugar for
1868  /// an instance of <specific type>. This scheme will eventually
1869  /// replace the specific getAsXXXX methods above.
1870  ///
1871  /// There are some specializations of this member template listed
1872  /// immediately following this class.
1873  template <typename T> const T *getAs() const;
1874 
1875  /// A variant of getAs<> for array types which silently discards
1876  /// qualifiers from the outermost type.
1877  const ArrayType *getAsArrayTypeUnsafe() const;
1878 
1879  /// Member-template castAs<specific type>. Look through sugar for
1880  /// the underlying instance of <specific type>.
1881  ///
1882  /// This method has the same relationship to getAs<T> as cast<T> has
1883  /// to dyn_cast<T>; which is to say, the underlying type *must*
1884  /// have the intended type, and this method will never return null.
1885  template <typename T> const T *castAs() const;
1886 
1887  /// A variant of castAs<> for array type which silently discards
1888  /// qualifiers from the outermost type.
1889  const ArrayType *castAsArrayTypeUnsafe() const;
1890 
1891  /// Get the base element type of this type, potentially discarding type
1892  /// qualifiers. This should never be used when type qualifiers
1893  /// are meaningful.
1894  const Type *getBaseElementTypeUnsafe() const;
1895 
1896  /// If this is an array type, return the element type of the array,
1897  /// potentially with type qualifiers missing.
1898  /// This should never be used when type qualifiers are meaningful.
1899  const Type *getArrayElementTypeNoTypeQual() const;
1900 
1901  /// If this is a pointer type, return the pointee type.
1902  /// If this is an array type, return the array element type.
1903  /// This should never be used when type qualifiers are meaningful.
1904  const Type *getPointeeOrArrayElementType() const;
1905 
1906  /// If this is a pointer, ObjC object pointer, or block
1907  /// pointer, this returns the respective pointee.
1908  QualType getPointeeType() const;
1909 
1910  /// Return the specified type with any "sugar" removed from the type,
1911  /// removing any typedefs, typeofs, etc., as well as any qualifiers.
1912  const Type *getUnqualifiedDesugaredType() const;
1913 
1914  /// More type predicates useful for type checking/promotion
1915  bool isPromotableIntegerType() const; // C99 6.3.1.1p2
1916 
1917  /// Return true if this is an integer type that is
1918  /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
1919  /// or an enum decl which has a signed representation.
1920  bool isSignedIntegerType() const;
1921 
1922  /// Return true if this is an integer type that is
1923  /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool],
1924  /// or an enum decl which has an unsigned representation.
1925  bool isUnsignedIntegerType() const;
1926 
1927  /// Determines whether this is an integer type that is signed or an
1928  /// enumeration types whose underlying type is a signed integer type.
1929  bool isSignedIntegerOrEnumerationType() const;
1930 
1931  /// Determines whether this is an integer type that is unsigned or an
1932  /// enumeration types whose underlying type is a unsigned integer type.
1934 
1935  /// Return true if this is not a variable sized type,
1936  /// according to the rules of C99 6.7.5p3. It is not legal to call this on
1937  /// incomplete types.
1938  bool isConstantSizeType() const;
1939 
1940  /// Returns true if this type can be represented by some
1941  /// set of type specifiers.
1942  bool isSpecifierType() const;
1943 
1944  /// Determine the linkage of this type.
1945  Linkage getLinkage() const;
1946 
1947  /// Determine the visibility of this type.
1950  }
1951 
1952  /// Return true if the visibility was explicitly set is the code.
1953  bool isVisibilityExplicit() const {
1955  }
1956 
1957  /// Determine the linkage and visibility of this type.
1959 
1960  /// True if the computed linkage is valid. Used for consistency
1961  /// checking. Should always return true.
1962  bool isLinkageValid() const;
1963 
1964  /// Determine the nullability of the given type.
1965  ///
1966  /// Note that nullability is only captured as sugar within the type
1967  /// system, not as part of the canonical type, so nullability will
1968  /// be lost by canonicalization and desugaring.
1969  Optional<NullabilityKind> getNullability(const ASTContext &context) const;
1970 
1971  /// Determine whether the given type can have a nullability
1972  /// specifier applied to it, i.e., if it is any kind of pointer type
1973  /// or a dependent type that could instantiate to any kind of
1974  /// pointer type.
1975  bool canHaveNullability() const;
1976 
1977  /// Retrieve the set of substitutions required when accessing a member
1978  /// of the Objective-C receiver type that is declared in the given context.
1979  ///
1980  /// \c *this is the type of the object we're operating on, e.g., the
1981  /// receiver for a message send or the base of a property access, and is
1982  /// expected to be of some object or object pointer type.
1983  ///
1984  /// \param dc The declaration context for which we are building up a
1985  /// substitution mapping, which should be an Objective-C class, extension,
1986  /// category, or method within.
1987  ///
1988  /// \returns an array of type arguments that can be substituted for
1989  /// the type parameters of the given declaration context in any type described
1990  /// within that context, or an empty optional to indicate that no
1991  /// substitution is required.
1993  getObjCSubstitutions(const DeclContext *dc) const;
1994 
1995  /// Determines if this is an ObjC interface type that may accept type
1996  /// parameters.
1997  bool acceptsObjCTypeParams() const;
1998 
1999  const char *getTypeClassName() const;
2000 
2002  return CanonicalType;
2003  }
2004  CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h
2005  void dump() const;
2006 
2007  friend class ASTReader;
2008  friend class ASTWriter;
2009 };
2010 
2011 /// \brief This will check for a TypedefType by removing any existing sugar
2012 /// until it reaches a TypedefType or a non-sugared type.
2013 template <> const TypedefType *Type::getAs() const;
2014 
2015 /// \brief This will check for a TemplateSpecializationType by removing any
2016 /// existing sugar until it reaches a TemplateSpecializationType or a
2017 /// non-sugared type.
2018 template <> const TemplateSpecializationType *Type::getAs() const;
2019 
2020 /// \brief This will check for an AttributedType by removing any existing sugar
2021 /// until it reaches an AttributedType or a non-sugared type.
2022 template <> const AttributedType *Type::getAs() const;
2023 
2024 // We can do canonical leaf types faster, because we don't have to
2025 // worry about preserving child type decoration.
2026 #define TYPE(Class, Base)
2027 #define LEAF_TYPE(Class) \
2028 template <> inline const Class##Type *Type::getAs() const { \
2029  return dyn_cast<Class##Type>(CanonicalType); \
2030 } \
2031 template <> inline const Class##Type *Type::castAs() const { \
2032  return cast<Class##Type>(CanonicalType); \
2033 }
2034 #include "clang/AST/TypeNodes.def"
2035 
2036 
2037 /// This class is used for builtin types like 'int'. Builtin
2038 /// types are always canonical and have a literal name field.
2039 class BuiltinType : public Type {
2040 public:
2041  enum Kind {
2042 // OpenCL image types
2043 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id,
2044 #include "clang/Basic/OpenCLImageTypes.def"
2045 // All other builtin types
2046 #define BUILTIN_TYPE(Id, SingletonId) Id,
2047 #define LAST_BUILTIN_TYPE(Id) LastKind = Id
2048 #include "clang/AST/BuiltinTypes.def"
2049  };
2050 
2051 public:
2053  : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent),
2054  /*InstantiationDependent=*/(K == Dependent),
2055  /*VariablyModified=*/false,
2056  /*Unexpanded paramter pack=*/false) {
2057  BuiltinTypeBits.Kind = K;
2058  }
2059 
2060  Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); }
2061  StringRef getName(const PrintingPolicy &Policy) const;
2062  const char *getNameAsCString(const PrintingPolicy &Policy) const {
2063  // The StringRef is null-terminated.
2064  StringRef str = getName(Policy);
2065  assert(!str.empty() && str.data()[str.size()] == '\0');
2066  return str.data();
2067  }
2068 
2069  bool isSugared() const { return false; }
2070  QualType desugar() const { return QualType(this, 0); }
2071 
2072  bool isInteger() const {
2073  return getKind() >= Bool && getKind() <= Int128;
2074  }
2075 
2076  bool isSignedInteger() const {
2077  return getKind() >= Char_S && getKind() <= Int128;
2078  }
2079 
2080  bool isUnsignedInteger() const {
2081  return getKind() >= Bool && getKind() <= UInt128;
2082  }
2083 
2084  bool isFloatingPoint() const {
2085  return getKind() >= Half && getKind() <= Float128;
2086  }
2087 
2088  /// Determines whether the given kind corresponds to a placeholder type.
2089  static bool isPlaceholderTypeKind(Kind K) {
2090  return K >= Overload;
2091  }
2092 
2093  /// Determines whether this type is a placeholder type, i.e. a type
2094  /// which cannot appear in arbitrary positions in a fully-formed
2095  /// expression.
2096  bool isPlaceholderType() const {
2097  return isPlaceholderTypeKind(getKind());
2098  }
2099 
2100  /// Determines whether this type is a placeholder type other than
2101  /// Overload. Most placeholder types require only syntactic
2102  /// information about their context in order to be resolved (e.g.
2103  /// whether it is a call expression), which means they can (and
2104  /// should) be resolved in an earlier "phase" of analysis.
2105  /// Overload expressions sometimes pick up further information
2106  /// from their context, like whether the context expects a
2107  /// specific function-pointer type, and so frequently need
2108  /// special treatment.
2110  return getKind() > Overload;
2111  }
2112 
2113  static bool classof(const Type *T) { return T->getTypeClass() == Builtin; }
2114 };
2115 
2116 /// Complex values, per C99 6.2.5p11. This supports the C99 complex
2117 /// types (_Complex float etc) as well as the GCC integer complex extensions.
2118 ///
2119 class ComplexType : public Type, public llvm::FoldingSetNode {
2120  QualType ElementType;
2121  ComplexType(QualType Element, QualType CanonicalPtr) :
2122  Type(Complex, CanonicalPtr, Element->isDependentType(),
2123  Element->isInstantiationDependentType(),
2124  Element->isVariablyModifiedType(),
2125  Element->containsUnexpandedParameterPack()),
2126  ElementType(Element) {
2127  }
2128  friend class ASTContext; // ASTContext creates these.
2129 
2130 public:
2131  QualType getElementType() const { return ElementType; }
2132 
2133  bool isSugared() const { return false; }
2134  QualType desugar() const { return QualType(this, 0); }
2135 
2136  void Profile(llvm::FoldingSetNodeID &ID) {
2137  Profile(ID, getElementType());
2138  }
2139  static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) {
2140  ID.AddPointer(Element.getAsOpaquePtr());
2141  }
2142 
2143  static bool classof(const Type *T) { return T->getTypeClass() == Complex; }
2144 };
2145 
2146 /// Sugar for parentheses used when specifying types.
2147 ///
2148 class ParenType : public Type, public llvm::FoldingSetNode {
2149  QualType Inner;
2150 
2151  ParenType(QualType InnerType, QualType CanonType) :
2152  Type(Paren, CanonType, InnerType->isDependentType(),
2153  InnerType->isInstantiationDependentType(),
2154  InnerType->isVariablyModifiedType(),
2155  InnerType->containsUnexpandedParameterPack()),
2156  Inner(InnerType) {
2157  }
2158  friend class ASTContext; // ASTContext creates these.
2159 
2160 public:
2161 
2162  QualType getInnerType() const { return Inner; }
2163 
2164  bool isSugared() const { return true; }
2165  QualType desugar() const { return getInnerType(); }
2166 
2167  void Profile(llvm::FoldingSetNodeID &ID) {
2168  Profile(ID, getInnerType());
2169  }
2170  static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) {
2171  Inner.Profile(ID);
2172  }
2173 
2174  static bool classof(const Type *T) { return T->getTypeClass() == Paren; }
2175 };
2176 
2177 /// PointerType - C99 6.7.5.1 - Pointer Declarators.
2178 ///
2179 class PointerType : public Type, public llvm::FoldingSetNode {
2180  QualType PointeeType;
2181 
2182  PointerType(QualType Pointee, QualType CanonicalPtr) :
2183  Type(Pointer, CanonicalPtr, Pointee->isDependentType(),
2184  Pointee->isInstantiationDependentType(),
2185  Pointee->isVariablyModifiedType(),
2186  Pointee->containsUnexpandedParameterPack()),
2187  PointeeType(Pointee) {
2188  }
2189  friend class ASTContext; // ASTContext creates these.
2190 
2191 public:
2192 
2193  QualType getPointeeType() const { return PointeeType; }
2194 
2195  /// Returns true if address spaces of pointers overlap.
2196  /// OpenCL v2.0 defines conversion rules for pointers to different
2197  /// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping
2198  /// address spaces.
2199  /// CL1.1 or CL1.2:
2200  /// address spaces overlap iff they are they same.
2201  /// CL2.0 adds:
2202  /// __generic overlaps with any address space except for __constant.
2203  bool isAddressSpaceOverlapping(const PointerType &other) const {
2204  Qualifiers thisQuals = PointeeType.getQualifiers();
2205  Qualifiers otherQuals = other.getPointeeType().getQualifiers();
2206  // Address spaces overlap if at least one of them is a superset of another
2207  return thisQuals.isAddressSpaceSupersetOf(otherQuals) ||
2208  otherQuals.isAddressSpaceSupersetOf(thisQuals);
2209  }
2210 
2211  bool isSugared() const { return false; }
2212  QualType desugar() const { return QualType(this, 0); }
2213 
2214  void Profile(llvm::FoldingSetNodeID &ID) {
2215  Profile(ID, getPointeeType());
2216  }
2217  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
2218  ID.AddPointer(Pointee.getAsOpaquePtr());
2219  }
2220 
2221  static bool classof(const Type *T) { return T->getTypeClass() == Pointer; }
2222 };
2223 
2224 /// Represents a type which was implicitly adjusted by the semantic
2225 /// engine for arbitrary reasons. For example, array and function types can
2226 /// decay, and function types can have their calling conventions adjusted.
2227 class AdjustedType : public Type, public llvm::FoldingSetNode {
2228  QualType OriginalTy;
2229  QualType AdjustedTy;
2230 
2231 protected:
2232  AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy,
2233  QualType CanonicalPtr)
2234  : Type(TC, CanonicalPtr, OriginalTy->isDependentType(),
2235  OriginalTy->isInstantiationDependentType(),
2236  OriginalTy->isVariablyModifiedType(),
2237  OriginalTy->containsUnexpandedParameterPack()),
2238  OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {}
2239 
2240  friend class ASTContext; // ASTContext creates these.
2241 
2242 public:
2243  QualType getOriginalType() const { return OriginalTy; }
2244  QualType getAdjustedType() const { return AdjustedTy; }
2245 
2246  bool isSugared() const { return true; }
2247  QualType desugar() const { return AdjustedTy; }
2248 
2249  void Profile(llvm::FoldingSetNodeID &ID) {
2250  Profile(ID, OriginalTy, AdjustedTy);
2251  }
2252  static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) {
2253  ID.AddPointer(Orig.getAsOpaquePtr());
2254  ID.AddPointer(New.getAsOpaquePtr());
2255  }
2256 
2257  static bool classof(const Type *T) {
2258  return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed;
2259  }
2260 };
2261 
2262 /// Represents a pointer type decayed from an array or function type.
2263 class DecayedType : public AdjustedType {
2264 
2265  DecayedType(QualType OriginalType, QualType DecayedPtr, QualType CanonicalPtr)
2266  : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) {
2267  assert(isa<PointerType>(getAdjustedType()));
2268  }
2269 
2270  friend class ASTContext; // ASTContext creates these.
2271 
2272 public:
2274 
2276  return cast<PointerType>(getDecayedType())->getPointeeType();
2277  }
2278 
2279  static bool classof(const Type *T) { return T->getTypeClass() == Decayed; }
2280 };
2281 
2282 /// Pointer to a block type.
2283 /// This type is to represent types syntactically represented as
2284 /// "void (^)(int)", etc. Pointee is required to always be a function type.
2285 ///
2286 class BlockPointerType : public Type, public llvm::FoldingSetNode {
2287  QualType PointeeType; // Block is some kind of pointer type
2288  BlockPointerType(QualType Pointee, QualType CanonicalCls) :
2289  Type(BlockPointer, CanonicalCls, Pointee->isDependentType(),
2290  Pointee->isInstantiationDependentType(),
2291  Pointee->isVariablyModifiedType(),
2292  Pointee->containsUnexpandedParameterPack()),
2293  PointeeType(Pointee) {
2294  }
2295  friend class ASTContext; // ASTContext creates these.
2296 
2297 public:
2298 
2299  // Get the pointee type. Pointee is required to always be a function type.
2300  QualType getPointeeType() const { return PointeeType; }
2301 
2302  bool isSugared() const { return false; }
2303  QualType desugar() const { return QualType(this, 0); }
2304 
2305  void Profile(llvm::FoldingSetNodeID &ID) {
2306  Profile(ID, getPointeeType());
2307  }
2308  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
2309  ID.AddPointer(Pointee.getAsOpaquePtr());
2310  }
2311 
2312  static bool classof(const Type *T) {
2313  return T->getTypeClass() == BlockPointer;
2314  }
2315 };
2316 
2317 /// Base for LValueReferenceType and RValueReferenceType
2318 ///
2319 class ReferenceType : public Type, public llvm::FoldingSetNode {
2320  QualType PointeeType;
2321 
2322 protected:
2323  ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef,
2324  bool SpelledAsLValue) :
2325  Type(tc, CanonicalRef, Referencee->isDependentType(),
2326  Referencee->isInstantiationDependentType(),
2327  Referencee->isVariablyModifiedType(),
2328  Referencee->containsUnexpandedParameterPack()),
2329  PointeeType(Referencee)
2330  {
2331  ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue;
2332  ReferenceTypeBits.InnerRef = Referencee->isReferenceType();
2333  }
2334 
2335 public:
2336  bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; }
2337  bool isInnerRef() const { return ReferenceTypeBits.InnerRef; }
2338 
2339  QualType getPointeeTypeAsWritten() const { return PointeeType; }
2341  // FIXME: this might strip inner qualifiers; okay?
2342  const ReferenceType *T = this;
2343  while (T->isInnerRef())
2344  T = T->PointeeType->castAs<ReferenceType>();
2345  return T->PointeeType;
2346  }
2347 
2348  void Profile(llvm::FoldingSetNodeID &ID) {
2349  Profile(ID, PointeeType, isSpelledAsLValue());
2350  }
2351  static void Profile(llvm::FoldingSetNodeID &ID,
2352  QualType Referencee,
2353  bool SpelledAsLValue) {
2354  ID.AddPointer(Referencee.getAsOpaquePtr());
2355  ID.AddBoolean(SpelledAsLValue);
2356  }
2357 
2358  static bool classof(const Type *T) {
2359  return T->getTypeClass() == LValueReference ||
2360  T->getTypeClass() == RValueReference;
2361  }
2362 };
2363 
2364 /// An lvalue reference type, per C++11 [dcl.ref].
2365 ///
2367  LValueReferenceType(QualType Referencee, QualType CanonicalRef,
2368  bool SpelledAsLValue) :
2369  ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue)
2370  {}
2371  friend class ASTContext; // ASTContext creates these
2372 public:
2373  bool isSugared() const { return false; }
2374  QualType desugar() const { return QualType(this, 0); }
2375 
2376  static bool classof(const Type *T) {
2377  return T->getTypeClass() == LValueReference;
2378  }
2379 };
2380 
2381 /// An rvalue reference type, per C++11 [dcl.ref].
2382 ///
2384  RValueReferenceType(QualType Referencee, QualType CanonicalRef) :
2385  ReferenceType(RValueReference, Referencee, CanonicalRef, false) {
2386  }
2387  friend class ASTContext; // ASTContext creates these
2388 public:
2389  bool isSugared() const { return false; }
2390  QualType desugar() const { return QualType(this, 0); }
2391 
2392  static bool classof(const Type *T) {
2393  return T->getTypeClass() == RValueReference;
2394  }
2395 };
2396 
2397 /// A pointer to member type per C++ 8.3.3 - Pointers to members.
2398 ///
2399 /// This includes both pointers to data members and pointer to member functions.
2400 ///
2401 class MemberPointerType : public Type, public llvm::FoldingSetNode {
2402  QualType PointeeType;
2403  /// The class of which the pointee is a member. Must ultimately be a
2404  /// RecordType, but could be a typedef or a template parameter too.
2405  const Type *Class;
2406 
2407  MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) :
2408  Type(MemberPointer, CanonicalPtr,
2409  Cls->isDependentType() || Pointee->isDependentType(),
2410  (Cls->isInstantiationDependentType() ||
2411  Pointee->isInstantiationDependentType()),
2412  Pointee->isVariablyModifiedType(),
2414  Pointee->containsUnexpandedParameterPack())),
2415  PointeeType(Pointee), Class(Cls) {
2416  }
2417  friend class ASTContext; // ASTContext creates these.
2418 
2419 public:
2420  QualType getPointeeType() const { return PointeeType; }
2421 
2422  /// Returns true if the member type (i.e. the pointee type) is a
2423  /// function type rather than a data-member type.
2425  return PointeeType->isFunctionProtoType();
2426  }
2427 
2428  /// Returns true if the member type (i.e. the pointee type) is a
2429  /// data type rather than a function type.
2430  bool isMemberDataPointer() const {
2431  return !PointeeType->isFunctionProtoType();
2432  }
2433 
2434  const Type *getClass() const { return Class; }
2436 
2437  bool isSugared() const { return false; }
2438  QualType desugar() const { return QualType(this, 0); }
2439 
2440  void Profile(llvm::FoldingSetNodeID &ID) {
2441  Profile(ID, getPointeeType(), getClass());
2442  }
2443  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee,
2444  const Type *Class) {
2445  ID.AddPointer(Pointee.getAsOpaquePtr());
2446  ID.AddPointer(Class);
2447  }
2448 
2449  static bool classof(const Type *T) {
2450  return T->getTypeClass() == MemberPointer;
2451  }
2452 };
2453 
2454 /// Represents an array type, per C99 6.7.5.2 - Array Declarators.
2455 ///
2456 class ArrayType : public Type, public llvm::FoldingSetNode {
2457 public:
2458  /// Capture whether this is a normal array (e.g. int X[4])
2459  /// an array with a static size (e.g. int X[static 4]), or an array
2460  /// with a star size (e.g. int X[*]).
2461  /// 'static' is only allowed on function parameters.
2464  };
2465 private:
2466  /// The element type of the array.
2467  QualType ElementType;
2468 
2469 protected:
2470  // C++ [temp.dep.type]p1:
2471  // A type is dependent if it is...
2472  // - an array type constructed from any dependent type or whose
2473  // size is specified by a constant expression that is
2474  // value-dependent,
2476  ArraySizeModifier sm, unsigned tq,
2477  bool ContainsUnexpandedParameterPack)
2478  : Type(tc, can, et->isDependentType() || tc == DependentSizedArray,
2479  et->isInstantiationDependentType() || tc == DependentSizedArray,
2480  (tc == VariableArray || et->isVariablyModifiedType()),
2481  ContainsUnexpandedParameterPack),
2482  ElementType(et) {
2483  ArrayTypeBits.IndexTypeQuals = tq;
2484  ArrayTypeBits.SizeModifier = sm;
2485  }
2486 
2487  friend class ASTContext; // ASTContext creates these.
2488 
2489 public:
2490  QualType getElementType() const { return ElementType; }
2492  return ArraySizeModifier(ArrayTypeBits.SizeModifier);
2493  }
2496  }
2497  unsigned getIndexTypeCVRQualifiers() const {
2498  return ArrayTypeBits.IndexTypeQuals;
2499  }
2500 
2501  static bool classof(const Type *T) {
2502  return T->getTypeClass() == ConstantArray ||
2503  T->getTypeClass() == VariableArray ||
2504  T->getTypeClass() == IncompleteArray ||
2505  T->getTypeClass() == DependentSizedArray;
2506  }
2507 };
2508 
2509 /// Represents the canonical version of C arrays with a specified constant size.
2510 /// For example, the canonical type for 'int A[4 + 4*100]' is a
2511 /// ConstantArrayType where the element type is 'int' and the size is 404.
2513  llvm::APInt Size; // Allows us to unique the type.
2514 
2515  ConstantArrayType(QualType et, QualType can, const llvm::APInt &size,
2516  ArraySizeModifier sm, unsigned tq)
2517  : ArrayType(ConstantArray, et, can, sm, tq,
2519  Size(size) {}
2520 protected:
2522  const llvm::APInt &size, ArraySizeModifier sm, unsigned tq)
2523  : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()),
2524  Size(size) {}
2525  friend class ASTContext; // ASTContext creates these.
2526 public:
2527  const llvm::APInt &getSize() const { return Size; }
2528  bool isSugared() const { return false; }
2529  QualType desugar() const { return QualType(this, 0); }
2530 
2531 
2532  /// \brief Determine the number of bits required to address a member of
2533  // an array with the given element type and number of elements.
2534  static unsigned getNumAddressingBits(const ASTContext &Context,
2535  QualType ElementType,
2536  const llvm::APInt &NumElements);
2537 
2538  /// \brief Determine the maximum number of active bits that an array's size
2539  /// can require, which limits the maximum size of the array.
2540  static unsigned getMaxSizeBits(const ASTContext &Context);
2541 
2542  void Profile(llvm::FoldingSetNodeID &ID) {
2543  Profile(ID, getElementType(), getSize(),
2545  }
2546  static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
2547  const llvm::APInt &ArraySize, ArraySizeModifier SizeMod,
2548  unsigned TypeQuals) {
2549  ID.AddPointer(ET.getAsOpaquePtr());
2550  ID.AddInteger(ArraySize.getZExtValue());
2551  ID.AddInteger(SizeMod);
2552  ID.AddInteger(TypeQuals);
2553  }
2554  static bool classof(const Type *T) {
2555  return T->getTypeClass() == ConstantArray;
2556  }
2557 };
2558 
2559 /// Represents a C array with an unspecified size. For example 'int A[]' has
2560 /// an IncompleteArrayType where the element type is 'int' and the size is
2561 /// unspecified.
2563 
2565  ArraySizeModifier sm, unsigned tq)
2566  : ArrayType(IncompleteArray, et, can, sm, tq,
2568  friend class ASTContext; // ASTContext creates these.
2569 public:
2570  bool isSugared() const { return false; }
2571  QualType desugar() const { return QualType(this, 0); }
2572 
2573  static bool classof(const Type *T) {
2574  return T->getTypeClass() == IncompleteArray;
2575  }
2576 
2577  friend class StmtIteratorBase;
2578 
2579  void Profile(llvm::FoldingSetNodeID &ID) {
2582  }
2583 
2584  static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
2585  ArraySizeModifier SizeMod, unsigned TypeQuals) {
2586  ID.AddPointer(ET.getAsOpaquePtr());
2587  ID.AddInteger(SizeMod);
2588  ID.AddInteger(TypeQuals);
2589  }
2590 };
2591 
2592 /// Represents a C array with a specified size that is not an
2593 /// integer-constant-expression. For example, 'int s[x+foo()]'.
2594 /// Since the size expression is an arbitrary expression, we store it as such.
2595 ///
2596 /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and
2597 /// should not be: two lexically equivalent variable array types could mean
2598 /// different things, for example, these variables do not have the same type
2599 /// dynamically:
2600 ///
2601 /// void foo(int x) {
2602 /// int Y[x];
2603 /// ++x;
2604 /// int Z[x];
2605 /// }
2606 ///
2608  /// An assignment-expression. VLA's are only permitted within
2609  /// a function block.
2610  Stmt *SizeExpr;
2611  /// The range spanned by the left and right array brackets.
2612  SourceRange Brackets;
2613 
2615  ArraySizeModifier sm, unsigned tq,
2616  SourceRange brackets)
2617  : ArrayType(VariableArray, et, can, sm, tq,
2619  SizeExpr((Stmt*) e), Brackets(brackets) {}
2620  friend class ASTContext; // ASTContext creates these.
2621 
2622 public:
2623  Expr *getSizeExpr() const {
2624  // We use C-style casts instead of cast<> here because we do not wish
2625  // to have a dependency of Type.h on Stmt.h/Expr.h.
2626  return (Expr*) SizeExpr;
2627  }
2628  SourceRange getBracketsRange() const { return Brackets; }
2629  SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
2630  SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }
2631 
2632  bool isSugared() const { return false; }
2633  QualType desugar() const { return QualType(this, 0); }
2634 
2635  static bool classof(const Type *T) {
2636  return T->getTypeClass() == VariableArray;
2637  }
2638 
2639  friend class StmtIteratorBase;
2640 
2641  void Profile(llvm::FoldingSetNodeID &ID) {
2642  llvm_unreachable("Cannot unique VariableArrayTypes.");
2643  }
2644 };
2645 
2646 /// Represents an array type in C++ whose size is a value-dependent expression.
2647 ///
2648 /// For example:
2649 /// \code
2650 /// template<typename T, int Size>
2651 /// class array {
2652 /// T data[Size];
2653 /// };
2654 /// \endcode
2655 ///
2656 /// For these types, we won't actually know what the array bound is
2657 /// until template instantiation occurs, at which point this will
2658 /// become either a ConstantArrayType or a VariableArrayType.
2660  const ASTContext &Context;
2661 
2662  /// \brief An assignment expression that will instantiate to the
2663  /// size of the array.
2664  ///
2665  /// The expression itself might be null, in which case the array
2666  /// type will have its size deduced from an initializer.
2667  Stmt *SizeExpr;
2668 
2669  /// The range spanned by the left and right array brackets.
2670  SourceRange Brackets;
2671 
2672  DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can,
2673  Expr *e, ArraySizeModifier sm, unsigned tq,
2674  SourceRange brackets);
2675 
2676  friend class ASTContext; // ASTContext creates these.
2677 
2678 public:
2679  Expr *getSizeExpr() const {
2680  // We use C-style casts instead of cast<> here because we do not wish
2681  // to have a dependency of Type.h on Stmt.h/Expr.h.
2682  return (Expr*) SizeExpr;
2683  }
2684  SourceRange getBracketsRange() const { return Brackets; }
2685  SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
2686  SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }
2687 
2688  bool isSugared() const { return false; }
2689  QualType desugar() const { return QualType(this, 0); }
2690 
2691  static bool classof(const Type *T) {
2692  return T->getTypeClass() == DependentSizedArray;
2693  }
2694 
2695  friend class StmtIteratorBase;
2696 
2697 
2698  void Profile(llvm::FoldingSetNodeID &ID) {
2699  Profile(ID, Context, getElementType(),
2701  }
2702 
2703  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
2704  QualType ET, ArraySizeModifier SizeMod,
2705  unsigned TypeQuals, Expr *E);
2706 };
2707 
2708 /// Represents an extended vector type where either the type or size is
2709 /// dependent.
2710 ///
2711 /// For example:
2712 /// \code
2713 /// template<typename T, int Size>
2714 /// class vector {
2715 /// typedef T __attribute__((ext_vector_type(Size))) type;
2716 /// }
2717 /// \endcode
2718 class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode {
2719  const ASTContext &Context;
2720  Expr *SizeExpr;
2721  /// The element type of the array.
2722  QualType ElementType;
2723  SourceLocation loc;
2724 
2725  DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType,
2726  QualType can, Expr *SizeExpr, SourceLocation loc);
2727 
2728  friend class ASTContext;
2729 
2730 public:
2731  Expr *getSizeExpr() const { return SizeExpr; }
2732  QualType getElementType() const { return ElementType; }
2733  SourceLocation getAttributeLoc() const { return loc; }
2734 
2735  bool isSugared() const { return false; }
2736  QualType desugar() const { return QualType(this, 0); }
2737 
2738  static bool classof(const Type *T) {
2739  return T->getTypeClass() == DependentSizedExtVector;
2740  }
2741 
2742  void Profile(llvm::FoldingSetNodeID &ID) {
2743  Profile(ID, Context, getElementType(), getSizeExpr());
2744  }
2745 
2746  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
2747  QualType ElementType, Expr *SizeExpr);
2748 };
2749 
2750 
2751 /// Represents a GCC generic vector type. This type is created using
2752 /// __attribute__((vector_size(n)), where "n" specifies the vector size in
2753 /// bytes; or from an Altivec __vector or vector declaration.
2754 /// Since the constructor takes the number of vector elements, the
2755 /// client is responsible for converting the size into the number of elements.
2756 class VectorType : public Type, public llvm::FoldingSetNode {
2757 public:
2758  enum VectorKind {
2759  GenericVector, ///< not a target-specific vector type
2760  AltiVecVector, ///< is AltiVec vector
2761  AltiVecPixel, ///< is AltiVec 'vector Pixel'
2762  AltiVecBool, ///< is AltiVec 'vector bool ...'
2763  NeonVector, ///< is ARM Neon vector
2764  NeonPolyVector ///< is ARM Neon polynomial vector
2765  };
2766 protected:
2767  /// The element type of the vector.
2769 
2770  VectorType(QualType vecType, unsigned nElements, QualType canonType,
2771  VectorKind vecKind);
2772 
2773  VectorType(TypeClass tc, QualType vecType, unsigned nElements,
2774  QualType canonType, VectorKind vecKind);
2775 
2776  friend class ASTContext; // ASTContext creates these.
2777 
2778 public:
2779 
2781  unsigned getNumElements() const { return VectorTypeBits.NumElements; }
2782  static bool isVectorSizeTooLarge(unsigned NumElements) {
2783  return NumElements > VectorTypeBitfields::MaxNumElements;
2784  }
2785 
2786  bool isSugared() const { return false; }
2787  QualType desugar() const { return QualType(this, 0); }
2788 
2790  return VectorKind(VectorTypeBits.VecKind);
2791  }
2792 
2793  void Profile(llvm::FoldingSetNodeID &ID) {
2796  }
2797  static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
2798  unsigned NumElements, TypeClass TypeClass,
2799  VectorKind VecKind) {
2800  ID.AddPointer(ElementType.getAsOpaquePtr());
2801  ID.AddInteger(NumElements);
2802  ID.AddInteger(TypeClass);
2803  ID.AddInteger(VecKind);
2804  }
2805 
2806  static bool classof(const Type *T) {
2807  return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector;
2808  }
2809 };
2810 
2811 /// ExtVectorType - Extended vector type. This type is created using
2812 /// __attribute__((ext_vector_type(n)), where "n" is the number of elements.
2813 /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This
2814 /// class enables syntactic extensions, like Vector Components for accessing
2815 /// points, colors, and textures (modeled after OpenGL Shading Language).
2816 class ExtVectorType : public VectorType {
2817  ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) :
2818  VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {}
2819  friend class ASTContext; // ASTContext creates these.
2820 public:
2821  static int getPointAccessorIdx(char c) {
2822  switch (c) {
2823  default: return -1;
2824  case 'x': return 0;
2825  case 'y': return 1;
2826  case 'z': return 2;
2827  case 'w': return 3;
2828  }
2829  }
2830  static int getNumericAccessorIdx(char c) {
2831  switch (c) {
2832  default: return -1;
2833  case '0': return 0;
2834  case '1': return 1;
2835  case '2': return 2;
2836  case '3': return 3;
2837  case '4': return 4;
2838  case '5': return 5;
2839  case '6': return 6;
2840  case '7': return 7;
2841  case '8': return 8;
2842  case '9': return 9;
2843  case 'A':
2844  case 'a': return 10;
2845  case 'B':
2846  case 'b': return 11;
2847  case 'C':
2848  case 'c': return 12;
2849  case 'D':
2850  case 'd': return 13;
2851  case 'E':
2852  case 'e': return 14;
2853  case 'F':
2854  case 'f': return 15;
2855  }
2856  }
2857 
2858  static int getAccessorIdx(char c) {
2859  if (int idx = getPointAccessorIdx(c)+1) return idx-1;
2860  return getNumericAccessorIdx(c);
2861  }
2862 
2863  bool isAccessorWithinNumElements(char c) const {
2864  if (int idx = getAccessorIdx(c)+1)
2865  return unsigned(idx-1) < getNumElements();
2866  return false;
2867  }
2868  bool isSugared() const { return false; }
2869  QualType desugar() const { return QualType(this, 0); }
2870 
2871  static bool classof(const Type *T) {
2872  return T->getTypeClass() == ExtVector;
2873  }
2874 };
2875 
2876 /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base
2877 /// class of FunctionNoProtoType and FunctionProtoType.
2878 ///
2879 class FunctionType : public Type {
2880  // The type returned by the function.
2881  QualType ResultType;
2882 
2883  public:
2884  /// A class which abstracts out some details necessary for
2885  /// making a call.
2886  ///
2887  /// It is not actually used directly for storing this information in
2888  /// a FunctionType, although FunctionType does currently use the
2889  /// same bit-pattern.
2890  ///
2891  // If you add a field (say Foo), other than the obvious places (both,
2892  // constructors, compile failures), what you need to update is
2893  // * Operator==
2894  // * getFoo
2895  // * withFoo
2896  // * functionType. Add Foo, getFoo.
2897  // * ASTContext::getFooType
2898  // * ASTContext::mergeFunctionTypes
2899  // * FunctionNoProtoType::Profile
2900  // * FunctionProtoType::Profile
2901  // * TypePrinter::PrintFunctionProto
2902  // * AST read and write
2903  // * Codegen
2904  class ExtInfo {
2905  // Feel free to rearrange or add bits, but if you go over 9,
2906  // you'll need to adjust both the Bits field below and
2907  // Type::FunctionTypeBitfields.
2908 
2909  // | CC |noreturn|produces|regparm|
2910  // |0 .. 3| 4 | 5 | 6 .. 8|
2911  //
2912  // regparm is either 0 (no regparm attribute) or the regparm value+1.
2913  enum { CallConvMask = 0xF };
2914  enum { NoReturnMask = 0x10 };
2915  enum { ProducesResultMask = 0x20 };
2916  enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask),
2917  RegParmOffset = 6 }; // Assumed to be the last field
2918 
2919  uint16_t Bits;
2920 
2921  ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {}
2922 
2923  friend class FunctionType;
2924 
2925  public:
2926  // Constructor with no defaults. Use this when you know that you
2927  // have all the elements (when reading an AST file for example).
2928  ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc,
2929  bool producesResult) {
2930  assert((!hasRegParm || regParm < 7) && "Invalid regparm value");
2931  Bits = ((unsigned) cc) |
2932  (noReturn ? NoReturnMask : 0) |
2933  (producesResult ? ProducesResultMask : 0) |
2934  (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0);
2935  }
2936 
2937  // Constructor with all defaults. Use when for example creating a
2938  // function known to use defaults.
2939  ExtInfo() : Bits(CC_C) { }
2940 
2941  // Constructor with just the calling convention, which is an important part
2942  // of the canonical type.
2943  ExtInfo(CallingConv CC) : Bits(CC) { }
2944 
2945  bool getNoReturn() const { return Bits & NoReturnMask; }
2946  bool getProducesResult() const { return Bits & ProducesResultMask; }
2947  bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; }
2948  unsigned getRegParm() const {
2949  unsigned RegParm = Bits >> RegParmOffset;
2950  if (RegParm > 0)
2951  --RegParm;
2952  return RegParm;
2953  }
2954  CallingConv getCC() const { return CallingConv(Bits & CallConvMask); }
2955 
2956  bool operator==(ExtInfo Other) const {
2957  return Bits == Other.Bits;
2958  }
2959  bool operator!=(ExtInfo Other) const {
2960  return Bits != Other.Bits;
2961  }
2962 
2963  // Note that we don't have setters. That is by design, use
2964  // the following with methods instead of mutating these objects.
2965 
2966  ExtInfo withNoReturn(bool noReturn) const {
2967  if (noReturn)
2968  return ExtInfo(Bits | NoReturnMask);
2969  else
2970  return ExtInfo(Bits & ~NoReturnMask);
2971  }
2972 
2973  ExtInfo withProducesResult(bool producesResult) const {
2974  if (producesResult)
2975  return ExtInfo(Bits | ProducesResultMask);
2976  else
2977  return ExtInfo(Bits & ~ProducesResultMask);
2978  }
2979 
2980  ExtInfo withRegParm(unsigned RegParm) const {
2981  assert(RegParm < 7 && "Invalid regparm value");
2982  return ExtInfo((Bits & ~RegParmMask) |
2983  ((RegParm + 1) << RegParmOffset));
2984  }
2985 
2987  return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc);
2988  }
2989 
2990  void Profile(llvm::FoldingSetNodeID &ID) const {
2991  ID.AddInteger(Bits);
2992  }
2993  };
2994 
2995 protected:
2997  QualType Canonical, bool Dependent,
2998  bool InstantiationDependent,
2999  bool VariablyModified, bool ContainsUnexpandedParameterPack,
3000  ExtInfo Info)
3001  : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
3002  ContainsUnexpandedParameterPack),
3003  ResultType(res) {
3004  FunctionTypeBits.ExtInfo = Info.Bits;
3005  }
3006  unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; }
3007 
3008 public:
3009  QualType getReturnType() const { return ResultType; }
3010 
3011  bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
3012  unsigned getRegParmType() const { return getExtInfo().getRegParm(); }
3013  /// Determine whether this function type includes the GNU noreturn
3014  /// attribute. The C++11 [[noreturn]] attribute does not affect the function
3015  /// type.
3016  bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }
3017  CallingConv getCallConv() const { return getExtInfo().getCC(); }
3018  ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }
3019  bool isConst() const { return getTypeQuals() & Qualifiers::Const; }
3020  bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; }
3021  bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; }
3022 
3023  /// \brief Determine the type of an expression that calls a function of
3024  /// this type.
3026  return getReturnType().getNonLValueExprType(Context);
3027  }
3028 
3029  static StringRef getNameForCallConv(CallingConv CC);
3030 
3031  static bool classof(const Type *T) {
3032  return T->getTypeClass() == FunctionNoProto ||
3033  T->getTypeClass() == FunctionProto;
3034  }
3035 };
3036 
3037 /// Represents a K&R-style 'int foo()' function, which has
3038 /// no information available about its arguments.
3039 class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
3041  : FunctionType(FunctionNoProto, Result, Canonical,
3042  /*Dependent=*/false, /*InstantiationDependent=*/false,
3043  Result->isVariablyModifiedType(),
3044  /*ContainsUnexpandedParameterPack=*/false, Info) {}
3045 
3046  friend class ASTContext; // ASTContext creates these.
3047 
3048 public:
3049  // No additional state past what FunctionType provides.
3050 
3051  bool isSugared() const { return false; }
3052  QualType desugar() const { return QualType(this, 0); }
3053 
3054  void Profile(llvm::FoldingSetNodeID &ID) {
3055  Profile(ID, getReturnType(), getExtInfo());
3056  }
3057  static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType,
3058  ExtInfo Info) {
3059  Info.Profile(ID);
3060  ID.AddPointer(ResultType.getAsOpaquePtr());
3061  }
3062 
3063  static bool classof(const Type *T) {
3064  return T->getTypeClass() == FunctionNoProto;
3065  }
3066 };
3067 
3068 /// Represents a prototype with parameter type info, e.g.
3069 /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no
3070 /// parameters, not as having a single void parameter. Such a type can have an
3071 /// exception specification, but this specification is not part of the canonical
3072 /// type.
3073 class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode {
3074 public:
3075  /// Interesting information about a specific parameter that can't simply
3076  /// be reflected in parameter's type.
3077  ///
3078  /// It makes sense to model language features this way when there's some
3079  /// sort of parameter-specific override (such as an attribute) that
3080  /// affects how the function is called. For example, the ARC ns_consumed
3081  /// attribute changes whether a parameter is passed at +0 (the default)
3082  /// or +1 (ns_consumed). This must be reflected in the function type,
3083  /// but isn't really a change to the parameter type.
3084  ///
3085  /// One serious disadvantage of modelling language features this way is
3086  /// that they generally do not work with language features that attempt
3087  /// to destructure types. For example, template argument deduction will
3088  /// not be able to match a parameter declared as
3089  /// T (*)(U)
3090  /// against an argument of type
3091  /// void (*)(__attribute__((ns_consumed)) id)
3092  /// because the substitution of T=void, U=id into the former will
3093  /// not produce the latter.
3095  enum {
3096  ABIMask = 0x0F,
3097  IsConsumed = 0x10
3098  };
3099  unsigned char Data;
3100  public:
3101  ExtParameterInfo() : Data(0) {}
3102 
3103  /// Return the ABI treatment of this parameter.
3105  return ParameterABI(Data & ABIMask);
3106  }
3108  ExtParameterInfo copy = *this;
3109  copy.Data = (copy.Data & ~ABIMask) | unsigned(kind);
3110  return copy;
3111  }
3112 
3113  /// Is this parameter considered "consumed" by Objective-C ARC?
3114  /// Consumed parameters must have retainable object type.
3115  bool isConsumed() const {
3116  return (Data & IsConsumed);
3117  }
3118  ExtParameterInfo withIsConsumed(bool consumed) const {
3119  ExtParameterInfo copy = *this;
3120  if (consumed) {
3121  copy.Data |= IsConsumed;
3122  } else {
3123  copy.Data &= ~IsConsumed;
3124  }
3125  return copy;
3126  }
3127 
3128  unsigned char getOpaqueValue() const { return Data; }
3129  static ExtParameterInfo getFromOpaqueValue(unsigned char data) {
3130  ExtParameterInfo result;
3131  result.Data = data;
3132  return result;
3133  }
3134 
3136  return lhs.Data == rhs.Data;
3137  }
3139  return lhs.Data != rhs.Data;
3140  }
3141  };
3142 
3145  : Type(EST_None), NoexceptExpr(nullptr),
3146  SourceDecl(nullptr), SourceTemplate(nullptr) {}
3147 
3149  : Type(EST), NoexceptExpr(nullptr), SourceDecl(nullptr),
3150  SourceTemplate(nullptr) {}
3151 
3152  /// The kind of exception specification this is.
3154  /// Explicitly-specified list of exception types.
3156  /// Noexcept expression, if this is EST_ComputedNoexcept.
3158  /// The function whose exception specification this is, for
3159  /// EST_Unevaluated and EST_Uninstantiated.
3161  /// The function template whose exception specification this is instantiated
3162  /// from, for EST_Uninstantiated.
3164  };
3165 
3166  /// Extra information about a function prototype.
3167  struct ExtProtoInfo {
3169  : Variadic(false), HasTrailingReturn(false), TypeQuals(0),
3170  RefQualifier(RQ_None), ExtParameterInfos(nullptr) {}
3171 
3173  : ExtInfo(CC), Variadic(false), HasTrailingReturn(false), TypeQuals(0),
3174  RefQualifier(RQ_None), ExtParameterInfos(nullptr) {}
3175 
3177  ExtProtoInfo Result(*this);
3178  Result.ExceptionSpec = O;
3179  return Result;
3180  }
3181 
3183  bool Variadic : 1;
3184  bool HasTrailingReturn : 1;
3185  unsigned char TypeQuals;
3189  };
3190 
3191 private:
3192  /// \brief Determine whether there are any argument types that
3193  /// contain an unexpanded parameter pack.
3194  static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray,
3195  unsigned numArgs) {
3196  for (unsigned Idx = 0; Idx < numArgs; ++Idx)
3197  if (ArgArray[Idx]->containsUnexpandedParameterPack())
3198  return true;
3199 
3200  return false;
3201  }
3202 
3204  QualType canonical, const ExtProtoInfo &epi);
3205 
3206  /// The number of parameters this function has, not counting '...'.
3207  unsigned NumParams : 15;
3208 
3209  /// The number of types in the exception spec, if any.
3210  unsigned NumExceptions : 9;
3211 
3212  /// The type of exception specification this function has.
3213  unsigned ExceptionSpecType : 4;
3214 
3215  /// Whether this function has extended parameter information.
3216  unsigned HasExtParameterInfos : 1;
3217 
3218  /// Whether the function is variadic.
3219  unsigned Variadic : 1;
3220 
3221  /// Whether this function has a trailing return type.
3222  unsigned HasTrailingReturn : 1;
3223 
3224  // ParamInfo - There is an variable size array after the class in memory that
3225  // holds the parameter types.
3226 
3227  // Exceptions - There is another variable size array after ArgInfo that
3228  // holds the exception types.
3229 
3230  // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing
3231  // to the expression in the noexcept() specifier.
3232 
3233  // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may
3234  // be a pair of FunctionDecl* pointing to the function which should be used to
3235  // instantiate this function type's exception specification, and the function
3236  // from which it should be instantiated.
3237 
3238  // ExtParameterInfos - A variable size array, following the exception
3239  // specification and of length NumParams, holding an ExtParameterInfo
3240  // for each of the parameters. This only appears if HasExtParameterInfos
3241  // is true.
3242 
3243  friend class ASTContext; // ASTContext creates these.
3244 
3245  const ExtParameterInfo *getExtParameterInfosBuffer() const {
3246  assert(hasExtParameterInfos());
3247 
3248  // Find the end of the exception specification.
3249  const char *ptr = reinterpret_cast<const char *>(exception_begin());
3250  ptr += getExceptionSpecSize();
3251 
3252  return reinterpret_cast<const ExtParameterInfo *>(ptr);
3253  }
3254 
3255  size_t getExceptionSpecSize() const {
3256  switch (getExceptionSpecType()) {
3257  case EST_None: return 0;
3258  case EST_DynamicNone: return 0;
3259  case EST_MSAny: return 0;
3260  case EST_BasicNoexcept: return 0;
3261  case EST_Unparsed: return 0;
3262  case EST_Dynamic: return getNumExceptions() * sizeof(QualType);
3263  case EST_ComputedNoexcept: return sizeof(Expr*);
3264  case EST_Uninstantiated: return 2 * sizeof(FunctionDecl*);
3265  case EST_Unevaluated: return sizeof(FunctionDecl*);
3266  }
3267  llvm_unreachable("bad exception specification kind");
3268  }
3269 
3270 public:
3271  unsigned getNumParams() const { return NumParams; }
3272  QualType getParamType(unsigned i) const {
3273  assert(i < NumParams && "invalid parameter index");
3274  return param_type_begin()[i];
3275  }
3277  return llvm::makeArrayRef(param_type_begin(), param_type_end());
3278  }
3279 
3281  ExtProtoInfo EPI;
3282  EPI.ExtInfo = getExtInfo();
3283  EPI.Variadic = isVariadic();
3284  EPI.HasTrailingReturn = hasTrailingReturn();
3285  EPI.ExceptionSpec.Type = getExceptionSpecType();
3286  EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals());
3287  EPI.RefQualifier = getRefQualifier();
3288  if (EPI.ExceptionSpec.Type == EST_Dynamic) {
3289  EPI.ExceptionSpec.Exceptions = exceptions();
3290  } else if (EPI.ExceptionSpec.Type == EST_ComputedNoexcept) {
3291  EPI.ExceptionSpec.NoexceptExpr = getNoexceptExpr();
3292  } else if (EPI.ExceptionSpec.Type == EST_Uninstantiated) {
3293  EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl();
3294  EPI.ExceptionSpec.SourceTemplate = getExceptionSpecTemplate();
3295  } else if (EPI.ExceptionSpec.Type == EST_Unevaluated) {
3296  EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl();
3297  }
3298  if (hasExtParameterInfos())
3299  EPI.ExtParameterInfos = getExtParameterInfosBuffer();
3300  return EPI;
3301  }
3302 
3303  /// Get the kind of exception specification on this function.
3305  return static_cast<ExceptionSpecificationType>(ExceptionSpecType);
3306  }
3307  /// Return whether this function has any kind of exception spec.
3308  bool hasExceptionSpec() const {
3309  return getExceptionSpecType() != EST_None;
3310  }
3311  /// Return whether this function has a dynamic (throw) exception spec.
3313  return isDynamicExceptionSpec(getExceptionSpecType());
3314  }
3315  /// Return whether this function has a noexcept exception spec.
3317  return isNoexceptExceptionSpec(getExceptionSpecType());
3318  }
3319  /// Return whether this function has a dependent exception spec.
3320  bool hasDependentExceptionSpec() const;
3321  /// Result type of getNoexceptSpec().
3323  NR_NoNoexcept, ///< There is no noexcept specifier.
3324  NR_BadNoexcept, ///< The noexcept specifier has a bad expression.
3325  NR_Dependent, ///< The noexcept specifier is dependent.
3326  NR_Throw, ///< The noexcept specifier evaluates to false.
3327  NR_Nothrow ///< The noexcept specifier evaluates to true.
3328  };
3329  /// Get the meaning of the noexcept spec on this function, if any.
3330  NoexceptResult getNoexceptSpec(const ASTContext &Ctx) const;
3331  unsigned getNumExceptions() const { return NumExceptions; }
3332  QualType getExceptionType(unsigned i) const {
3333  assert(i < NumExceptions && "Invalid exception number!");
3334  return exception_begin()[i];
3335  }
3337  if (getExceptionSpecType() != EST_ComputedNoexcept)
3338  return nullptr;
3339  // NoexceptExpr sits where the arguments end.
3340  return *reinterpret_cast<Expr *const *>(param_type_end());
3341  }
3342  /// \brief If this function type has an exception specification which hasn't
3343  /// been determined yet (either because it has not been evaluated or because
3344  /// it has not been instantiated), this is the function whose exception
3345  /// specification is represented by this type.
3347  if (getExceptionSpecType() != EST_Uninstantiated &&
3348  getExceptionSpecType() != EST_Unevaluated)
3349  return nullptr;
3350  return reinterpret_cast<FunctionDecl *const *>(param_type_end())[0];
3351  }
3352  /// \brief If this function type has an uninstantiated exception
3353  /// specification, this is the function whose exception specification
3354  /// should be instantiated to find the exception specification for
3355  /// this type.
3357  if (getExceptionSpecType() != EST_Uninstantiated)
3358  return nullptr;
3359  return reinterpret_cast<FunctionDecl *const *>(param_type_end())[1];
3360  }
3361  /// Determine whether this function type has a non-throwing exception
3362  /// specification. If this depends on template arguments, returns
3363  /// \c ResultIfDependent.
3364  bool isNothrow(const ASTContext &Ctx, bool ResultIfDependent = false) const;
3365 
3366  bool isVariadic() const { return Variadic; }
3367 
3368  /// Determines whether this function prototype contains a
3369  /// parameter pack at the end.
3370  ///
3371  /// A function template whose last parameter is a parameter pack can be
3372  /// called with an arbitrary number of arguments, much like a variadic
3373  /// function.
3374  bool isTemplateVariadic() const;
3375 
3376  bool hasTrailingReturn() const { return HasTrailingReturn; }
3377 
3378  unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); }
3379 
3380 
3381  /// Retrieve the ref-qualifier associated with this function type.
3383  return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
3384  }
3385 
3387  typedef llvm::iterator_range<param_type_iterator> param_type_range;
3388 
3390  return param_type_range(param_type_begin(), param_type_end());
3391  }
3393  return reinterpret_cast<const QualType *>(this+1);
3394  }
3396  return param_type_begin() + NumParams;
3397  }
3398 
3400 
3402  return llvm::makeArrayRef(exception_begin(), exception_end());
3403  }
3405  // exceptions begin where arguments end
3406  return param_type_end();
3407  }
3409  if (getExceptionSpecType() != EST_Dynamic)
3410  return exception_begin();
3411  return exception_begin() + NumExceptions;
3412  }
3413 
3414  /// Is there any interesting extra information for any of the parameters
3415  /// of this function type?
3416  bool hasExtParameterInfos() const { return HasExtParameterInfos; }
3418  assert(hasExtParameterInfos());
3419  return ArrayRef<ExtParameterInfo>(getExtParameterInfosBuffer(),
3420  getNumParams());
3421  }
3422  /// Return a pointer to the beginning of the array of extra parameter
3423  /// information, if present, or else null if none of the parameters
3424  /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos.
3426  if (!hasExtParameterInfos())
3427  return nullptr;
3428  return getExtParameterInfosBuffer();
3429  }
3430 
3432  assert(I < getNumParams() && "parameter index out of range");
3433  if (hasExtParameterInfos())
3434  return getExtParameterInfosBuffer()[I];
3435  return ExtParameterInfo();
3436  }
3437 
3438  ParameterABI getParameterABI(unsigned I) const {
3439  assert(I < getNumParams() && "parameter index out of range");
3440  if (hasExtParameterInfos())
3441  return getExtParameterInfosBuffer()[I].getABI();
3442  return ParameterABI::Ordinary;
3443  }
3444 
3445  bool isParamConsumed(unsigned I) const {
3446  assert(I < getNumParams() && "parameter index out of range");
3447  if (hasExtParameterInfos())
3448  return getExtParameterInfosBuffer()[I].isConsumed();
3449  return false;
3450  }
3451 
3452  bool isSugared() const { return false; }
3453  QualType desugar() const { return QualType(this, 0); }
3454 
3455  void printExceptionSpecification(raw_ostream &OS,
3456  const PrintingPolicy &Policy) const;
3457 
3458  static bool classof(const Type *T) {
3459  return T->getTypeClass() == FunctionProto;
3460  }
3461 
3462  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx);
3463  static void Profile(llvm::FoldingSetNodeID &ID, QualType Result,
3464  param_type_iterator ArgTys, unsigned NumArgs,
3465  const ExtProtoInfo &EPI, const ASTContext &Context);
3466 };
3467 
3468 /// \brief Represents the dependent type named by a dependently-scoped
3469 /// typename using declaration, e.g.
3470 /// using typename Base<T>::foo;
3471 ///
3472 /// Template instantiation turns these into the underlying type.
3473 class UnresolvedUsingType : public Type {
3475 
3477  : Type(UnresolvedUsing, QualType(), true, true, false,
3478  /*ContainsUnexpandedParameterPack=*/false),
3479  Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {}
3480  friend class ASTContext; // ASTContext creates these.
3481 public:
3482 
3484 
3485  bool isSugared() const { return false; }
3486  QualType desugar() const { return QualType(this, 0); }
3487 
3488  static bool classof(const Type *T) {
3489  return T->getTypeClass() == UnresolvedUsing;
3490  }
3491 
3492  void Profile(llvm::FoldingSetNodeID &ID) {
3493  return Profile(ID, Decl);
3494  }
3495  static void Profile(llvm::FoldingSetNodeID &ID,
3497  ID.AddPointer(D);
3498  }
3499 };
3500 
3501 
3502 class TypedefType : public Type {
3504 protected:
3506  : Type(tc, can, can->isDependentType(),
3508  can->isVariablyModifiedType(),
3509  /*ContainsUnexpandedParameterPack=*/false),
3510  Decl(const_cast<TypedefNameDecl*>(D)) {
3511  assert(!isa<TypedefType>(can) && "Invalid canonical type");
3512  }
3513  friend class ASTContext; // ASTContext creates these.
3514 public:
3515 
3516  TypedefNameDecl *getDecl() const { return Decl; }
3517 
3518  bool isSugared() const { return true; }
3519  QualType desugar() const;
3520 
3521  static bool classof(const Type *T) { return T->getTypeClass() == Typedef; }
3522 };
3523 
3524 /// Represents a `typeof` (or __typeof__) expression (a GCC extension).
3525 class TypeOfExprType : public Type {
3526  Expr *TOExpr;
3527 
3528 protected:
3529  TypeOfExprType(Expr *E, QualType can = QualType());
3530  friend class ASTContext; // ASTContext creates these.
3531 public:
3532  Expr *getUnderlyingExpr() const { return TOExpr; }
3533 
3534  /// \brief Remove a single level of sugar.
3535  QualType desugar() const;
3536 
3537  /// \brief Returns whether this type directly provides sugar.
3538  bool isSugared() const;
3539 
3540  static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; }
3541 };
3542 
3543 /// \brief Internal representation of canonical, dependent
3544 /// `typeof(expr)` types.
3545 ///
3546 /// This class is used internally by the ASTContext to manage
3547 /// canonical, dependent types, only. Clients will only see instances
3548 /// of this class via TypeOfExprType nodes.
3550  : public TypeOfExprType, public llvm::FoldingSetNode {
3551  const ASTContext &Context;
3552 
3553 public:
3555  : TypeOfExprType(E), Context(Context) { }
3556 
3557  void Profile(llvm::FoldingSetNodeID &ID) {
3558  Profile(ID, Context, getUnderlyingExpr());
3559  }
3560 
3561  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3562  Expr *E);
3563 };
3564 
3565 /// Represents `typeof(type)`, a GCC extension.
3566 class TypeOfType : public Type {
3567  QualType TOType;
3568  TypeOfType(QualType T, QualType can)
3569  : Type(TypeOf, can, T->isDependentType(),
3573  TOType(T) {
3574  assert(!isa<TypedefType>(can) && "Invalid canonical type");
3575  }
3576  friend class ASTContext; // ASTContext creates these.
3577 public:
3578  QualType getUnderlyingType() const { return TOType; }
3579 
3580  /// \brief Remove a single level of sugar.
3581  QualType desugar() const { return getUnderlyingType(); }
3582 
3583  /// \brief Returns whether this type directly provides sugar.
3584  bool isSugared() const { return true; }
3585 
3586  static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; }
3587 };
3588 
3589 /// Represents the type `decltype(expr)` (C++11).
3590 class DecltypeType : public Type {
3591  Expr *E;
3592  QualType UnderlyingType;
3593 
3594 protected:
3595  DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType());
3596  friend class ASTContext; // ASTContext creates these.
3597 public:
3598  Expr *getUnderlyingExpr() const { return E; }
3599  QualType getUnderlyingType() const { return UnderlyingType; }
3600 
3601  /// \brief Remove a single level of sugar.
3602  QualType desugar() const;
3603 
3604  /// \brief Returns whether this type directly provides sugar.
3605  bool isSugared() const;
3606 
3607  static bool classof(const Type *T) { return T->getTypeClass() == Decltype; }
3608 };
3609 
3610 /// \brief Internal representation of canonical, dependent
3611 /// decltype(expr) types.
3612 ///
3613 /// This class is used internally by the ASTContext to manage
3614 /// canonical, dependent types, only. Clients will only see instances
3615 /// of this class via DecltypeType nodes.
3616 class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode {
3617  const ASTContext &Context;
3618 
3619 public:
3621 
3622  void Profile(llvm::FoldingSetNodeID &ID) {
3623  Profile(ID, Context, getUnderlyingExpr());
3624  }
3625 
3626  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3627  Expr *E);
3628 };
3629 
3630 /// A unary type transform, which is a type constructed from another.
3631 class UnaryTransformType : public Type {
3632 public:
3633  enum UTTKind {
3634  EnumUnderlyingType
3635  };
3636 
3637 private:
3638  /// The untransformed type.
3639  QualType BaseType;
3640  /// The transformed type if not dependent, otherwise the same as BaseType.
3641  QualType UnderlyingType;
3642 
3643  UTTKind UKind;
3644 protected:
3645  UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind,
3646  QualType CanonicalTy);
3647  friend class ASTContext;
3648 public:
3649  bool isSugared() const { return !isDependentType(); }
3650  QualType desugar() const { return UnderlyingType; }
3651 
3652  QualType getUnderlyingType() const { return UnderlyingType; }
3653  QualType getBaseType() const { return BaseType; }
3654 
3655  UTTKind getUTTKind() const { return UKind; }
3656 
3657  static bool classof(const Type *T) {
3658  return T->getTypeClass() == UnaryTransform;
3659  }
3660 };
3661 
3662 /// \brief Internal representation of canonical, dependent
3663 /// __underlying_type(type) types.
3664 ///
3665 /// This class is used internally by the ASTContext to manage
3666 /// canonical, dependent types, only. Clients will only see instances
3667 /// of this class via UnaryTransformType nodes.
3669  public llvm::FoldingSetNode {
3670 public:
3671  DependentUnaryTransformType(const ASTContext &C, QualType BaseType,
3672  UTTKind UKind);
3673  void Profile(llvm::FoldingSetNodeID &ID) {
3674  Profile(ID, getBaseType(), getUTTKind());
3675  }
3676 
3677  static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType,
3678  UTTKind UKind) {
3679  ID.AddPointer(BaseType.getAsOpaquePtr());
3680  ID.AddInteger((unsigned)UKind);
3681  }
3682 };
3683 
3684 class TagType : public Type {
3685  /// Stores the TagDecl associated with this type. The decl may point to any
3686  /// TagDecl that declares the entity.
3687  TagDecl * decl;
3688 
3689  friend class ASTReader;
3690 
3691 protected:
3692  TagType(TypeClass TC, const TagDecl *D, QualType can);
3693 
3694 public:
3695  TagDecl *getDecl() const;
3696 
3697  /// Determines whether this type is in the process of being defined.
3698  bool isBeingDefined() const;
3699 
3700  static bool classof(const Type *T) {
3701  return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast;
3702  }
3703 };
3704 
3705 /// A helper class that allows the use of isa/cast/dyncast
3706 /// to detect TagType objects of structs/unions/classes.
3707 class RecordType : public TagType {
3708 protected:
3709  explicit RecordType(const RecordDecl *D)
3710  : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { }
3712  : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { }
3713  friend class ASTContext; // ASTContext creates these.
3714 public:
3715 
3716  RecordDecl *getDecl() const {
3717  return reinterpret_cast<RecordDecl*>(TagType::getDecl());
3718  }
3719 
3720  // FIXME: This predicate is a helper to QualType/Type. It needs to
3721  // recursively check all fields for const-ness. If any field is declared
3722  // const, it needs to return false.
3723  bool hasConstFields() const { return false; }
3724 
3725  bool isSugared() const { return false; }
3726  QualType desugar() const { return QualType(this, 0); }
3727 
3728  static bool classof(const Type *T) { return T->getTypeClass() == Record; }
3729 };
3730 
3731 /// A helper class that allows the use of isa/cast/dyncast
3732 /// to detect TagType objects of enums.
3733 class EnumType : public TagType {
3734  explicit EnumType(const EnumDecl *D)
3735  : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { }
3736  friend class ASTContext; // ASTContext creates these.
3737 public:
3738 
3739  EnumDecl *getDecl() const {
3740  return reinterpret_cast<EnumDecl*>(TagType::getDecl());
3741  }
3742 
3743  bool isSugared() const { return false; }
3744  QualType desugar() const { return QualType(this, 0); }
3745 
3746  static bool classof(const Type *T) { return T->getTypeClass() == Enum; }
3747 };
3748 
3749 /// An attributed type is a type to which a type attribute has been applied.
3750 ///
3751 /// The "modified type" is the fully-sugared type to which the attributed
3752 /// type was applied; generally it is not canonically equivalent to the
3753 /// attributed type. The "equivalent type" is the minimally-desugared type
3754 /// which the type is canonically equivalent to.
3755 ///
3756 /// For example, in the following attributed type:
3757 /// int32_t __attribute__((vector_size(16)))
3758 /// - the modified type is the TypedefType for int32_t
3759 /// - the equivalent type is VectorType(16, int32_t)
3760 /// - the canonical type is VectorType(16, int)
3761 class AttributedType : public Type, public llvm::FoldingSetNode {
3762 public:
3763  // It is really silly to have yet another attribute-kind enum, but
3764  // clang::attr::Kind doesn't currently cover the pure type attrs.
3765  enum Kind {
3766  // Expression operand.
3772 
3773  FirstExprOperandKind = attr_address_space,
3774  LastExprOperandKind = attr_neon_polyvector_type,
3775 
3776  // Enumerated operand (string or keyword).
3781 
3782  FirstEnumOperandKind = attr_objc_gc,
3783  LastEnumOperandKind = attr_pcs_vfp,
3784 
3785  // No operand.
3808  };
3809 
3810 private:
3811  QualType ModifiedType;
3812  QualType EquivalentType;
3813 
3814  friend class ASTContext; // creates these
3815 
3816  AttributedType(QualType canon, Kind attrKind,
3817  QualType modified, QualType equivalent)
3818  : Type(Attributed, canon, canon->isDependentType(),
3820  canon->isVariablyModifiedType(),
3822  ModifiedType(modified), EquivalentType(equivalent) {
3823  AttributedTypeBits.AttrKind = attrKind;
3824  }
3825 
3826 public:
3827  Kind getAttrKind() const {
3828  return static_cast<Kind>(AttributedTypeBits.AttrKind);
3829  }
3830 
3831  QualType getModifiedType() const { return ModifiedType; }
3832  QualType getEquivalentType() const { return EquivalentType; }
3833 
3834  bool isSugared() const { return true; }
3835  QualType desugar() const { return getEquivalentType(); }
3836 
3837  /// Does this attribute behave like a type qualifier?
3838  ///
3839  /// A type qualifier adjusts a type to provide specialized rules for
3840  /// a specific object, like the standard const and volatile qualifiers.
3841  /// This includes attributes controlling things like nullability,
3842  /// address spaces, and ARC ownership. The value of the object is still
3843  /// largely described by the modified type.
3844  ///
3845  /// In contrast, many type attributes "rewrite" their modified type to
3846  /// produce a fundamentally different type, not necessarily related in any
3847  /// formalizable way to the original type. For example, calling convention
3848  /// and vector attributes are not simple type qualifiers.
3849  ///
3850  /// Type qualifiers are often, but not always, reflected in the canonical
3851  /// type.
3852  bool isQualifier() const;
3853 
3854  bool isMSTypeSpec() const;
3855 
3856  bool isCallingConv() const;
3857 
3858  llvm::Optional<NullabilityKind> getImmediateNullability() const;
3859 
3860  /// Retrieve the attribute kind corresponding to the given
3861  /// nullability kind.
3863  switch (kind) {
3865  return attr_nonnull;
3866 
3868  return attr_nullable;
3869 
3871  return attr_null_unspecified;
3872  }
3873  llvm_unreachable("Unknown nullability kind.");
3874  }
3875 
3876  /// Strip off the top-level nullability annotation on the given
3877  /// type, if it's there.
3878  ///
3879  /// \param T The type to strip. If the type is exactly an
3880  /// AttributedType specifying nullability (without looking through
3881  /// type sugar), the nullability is returned and this type changed
3882  /// to the underlying modified type.
3883  ///
3884  /// \returns the top-level nullability, if present.
3885  static Optional<NullabilityKind> stripOuterNullability(QualType &T);
3886 
3887  void Profile(llvm::FoldingSetNodeID &ID) {
3888  Profile(ID, getAttrKind(), ModifiedType, EquivalentType);
3889  }
3890 
3891  static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind,
3892  QualType modified, QualType equivalent) {
3893  ID.AddInteger(attrKind);
3894  ID.AddPointer(modified.getAsOpaquePtr());
3895  ID.AddPointer(equivalent.getAsOpaquePtr());
3896  }
3897 
3898  static bool classof(const Type *T) {
3899  return T->getTypeClass() == Attributed;
3900  }
3901 };
3902 
3903 class TemplateTypeParmType : public Type, public llvm::FoldingSetNode {
3904  // Helper data collector for canonical types.
3905  struct CanonicalTTPTInfo {
3906  unsigned Depth : 15;
3907  unsigned ParameterPack : 1;
3908  unsigned Index : 16;
3909  };
3910 
3911  union {
3912  // Info for the canonical type.
3913  CanonicalTTPTInfo CanTTPTInfo;
3914  // Info for the non-canonical type.
3916  };
3917 
3918  /// Build a non-canonical type.
3920  : Type(TemplateTypeParm, Canon, /*Dependent=*/true,
3921  /*InstantiationDependent=*/true,
3922  /*VariablyModified=*/false,
3924  TTPDecl(TTPDecl) { }
3925 
3926  /// Build the canonical type.
3927  TemplateTypeParmType(unsigned D, unsigned I, bool PP)
3928  : Type(TemplateTypeParm, QualType(this, 0),
3929  /*Dependent=*/true,
3930  /*InstantiationDependent=*/true,
3931  /*VariablyModified=*/false, PP) {
3932  CanTTPTInfo.Depth = D;
3933  CanTTPTInfo.Index = I;
3934  CanTTPTInfo.ParameterPack = PP;
3935  }
3936 
3937  friend class ASTContext; // ASTContext creates these
3938 
3939  const CanonicalTTPTInfo& getCanTTPTInfo() const {
3941  return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo;
3942  }
3943 
3944 public:
3945  unsigned getDepth() const { return getCanTTPTInfo().Depth; }
3946  unsigned getIndex() const { return getCanTTPTInfo().Index; }
3947  bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; }
3948 
3950  return isCanonicalUnqualified() ? nullptr : TTPDecl;
3951  }
3952 
3953  IdentifierInfo *getIdentifier() const;
3954 
3955  bool isSugared() const { return false; }
3956  QualType desugar() const { return QualType(this, 0); }
3957 
3958  void Profile(llvm::FoldingSetNodeID &ID) {
3959  Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl());
3960  }
3961 
3962  static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth,
3963  unsigned Index, bool ParameterPack,
3964  TemplateTypeParmDecl *TTPDecl) {
3965  ID.AddInteger(Depth);
3966  ID.AddInteger(Index);
3967  ID.AddBoolean(ParameterPack);
3968  ID.AddPointer(TTPDecl);
3969  }
3970 
3971  static bool classof(const Type *T) {
3972  return T->getTypeClass() == TemplateTypeParm;
3973  }
3974 };
3975 
3976 /// \brief Represents the result of substituting a type for a template
3977 /// type parameter.
3978 ///
3979 /// Within an instantiated template, all template type parameters have
3980 /// been replaced with these. They are used solely to record that a
3981 /// type was originally written as a template type parameter;
3982 /// therefore they are never canonical.
3983 class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode {
3984  // The original type parameter.
3985  const TemplateTypeParmType *Replaced;
3986 
3988  : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(),
3990  Canon->isVariablyModifiedType(),
3992  Replaced(Param) { }
3993 
3994  friend class ASTContext;
3995 
3996 public:
3997  /// Gets the template parameter that was substituted for.
3999  return Replaced;
4000  }
4001 
4002  /// Gets the type that was substituted for the template
4003  /// parameter.
4005  return getCanonicalTypeInternal();
4006  }
4007 
4008  bool isSugared() const { return true; }
4009  QualType desugar() const { return getReplacementType(); }
4010 
4011  void Profile(llvm::FoldingSetNodeID &ID) {
4012  Profile(ID, getReplacedParameter(), getReplacementType());
4013  }
4014  static void Profile(llvm::FoldingSetNodeID &ID,
4015  const TemplateTypeParmType *Replaced,
4017  ID.AddPointer(Replaced);
4018  ID.AddPointer(Replacement.getAsOpaquePtr());
4019  }
4020 
4021  static bool classof(const Type *T) {
4022  return T->getTypeClass() == SubstTemplateTypeParm;
4023  }
4024 };
4025 
4026 /// \brief Represents the result of substituting a set of types for a template
4027 /// type parameter pack.
4028 ///
4029 /// When a pack expansion in the source code contains multiple parameter packs
4030 /// and those parameter packs correspond to different levels of template
4031 /// parameter lists, this type node is used to represent a template type
4032 /// parameter pack from an outer level, which has already had its argument pack
4033 /// substituted but that still lives within a pack expansion that itself
4034 /// could not be instantiated. When actually performing a substitution into
4035 /// that pack expansion (e.g., when all template parameters have corresponding
4036 /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType
4037 /// at the current pack substitution index.
4038 class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode {
4039  /// \brief The original type parameter.
4040  const TemplateTypeParmType *Replaced;
4041 
4042  /// \brief A pointer to the set of template arguments that this
4043  /// parameter pack is instantiated with.
4044  const TemplateArgument *Arguments;
4045 
4046  /// \brief The number of template arguments in \c Arguments.
4047  unsigned NumArguments;
4048 
4050  QualType Canon,
4051  const TemplateArgument &ArgPack);
4052 
4053  friend class ASTContext;
4054 
4055 public:
4056  IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); }
4057 
4058  /// Gets the template parameter that was substituted for.
4060  return Replaced;
4061  }
4062 
4063  bool isSugared() const { return false; }
4064  QualType desugar() const { return QualType(this, 0); }
4065 
4066  TemplateArgument getArgumentPack() const;
4067 
4068  void Profile(llvm::FoldingSetNodeID &ID);
4069  static void Profile(llvm::FoldingSetNodeID &ID,
4070  const TemplateTypeParmType *Replaced,
4071  const TemplateArgument &ArgPack);
4072 
4073  static bool classof(const Type *T) {
4074  return T->getTypeClass() == SubstTemplateTypeParmPack;
4075  }
4076 };
4077 
4078 /// \brief Represents a C++11 auto or C++14 decltype(auto) type.
4079 ///
4080 /// These types are usually a placeholder for a deduced type. However, before
4081 /// the initializer is attached, or if the initializer is type-dependent, there
4082 /// is no deduced type and an auto type is canonical. In the latter case, it is
4083 /// also a dependent type.
4084 class AutoType : public Type, public llvm::FoldingSetNode {
4085  AutoType(QualType DeducedType, AutoTypeKeyword Keyword, bool IsDependent)
4086  : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType,
4087  /*Dependent=*/IsDependent, /*InstantiationDependent=*/IsDependent,
4088  /*VariablyModified=*/false,
4089  /*ContainsParameterPack=*/DeducedType.isNull()
4090  ? false : DeducedType->containsUnexpandedParameterPack()) {
4091  assert((DeducedType.isNull() || !IsDependent) &&
4092  "auto deduced to dependent type");
4093  AutoTypeBits.Keyword = (unsigned)Keyword;
4094  }
4095 
4096  friend class ASTContext; // ASTContext creates these
4097 
4098 public:
4099  bool isDecltypeAuto() const {
4100  return getKeyword() == AutoTypeKeyword::DecltypeAuto;
4101  }
4103  return (AutoTypeKeyword)AutoTypeBits.Keyword;
4104  }
4105 
4106  bool isSugared() const { return !isCanonicalUnqualified(); }
4108 
4109  /// \brief Get the type deduced for this auto type, or null if it's either
4110  /// not been deduced or was deduced to a dependent type.
4113  }
4114  bool isDeduced() const {
4115  return !isCanonicalUnqualified() || isDependentType();
4116  }
4117 
4118  void Profile(llvm::FoldingSetNodeID &ID) {
4119  Profile(ID, getDeducedType(), getKeyword(), isDependentType());
4120  }
4121 
4122  static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced,
4123  AutoTypeKeyword Keyword, bool IsDependent) {
4124  ID.AddPointer(Deduced.getAsOpaquePtr());
4125  ID.AddInteger((unsigned)Keyword);
4126  ID.AddBoolean(IsDependent);
4127  }
4128 
4129  static bool classof(const Type *T) {
4130  return T->getTypeClass() == Auto;
4131  }
4132 };
4133 
4134 /// \brief Represents a type template specialization; the template
4135 /// must be a class template, a type alias template, or a template
4136 /// template parameter. A template which cannot be resolved to one of
4137 /// these, e.g. because it is written with a dependent scope
4138 /// specifier, is instead represented as a
4139 /// @c DependentTemplateSpecializationType.
4140 ///
4141 /// A non-dependent template specialization type is always "sugar",
4142 /// typically for a \c RecordType. For example, a class template
4143 /// specialization type of \c vector<int> will refer to a tag type for
4144 /// the instantiation \c std::vector<int, std::allocator<int>>
4145 ///
4146 /// Template specializations are dependent if either the template or
4147 /// any of the template arguments are dependent, in which case the
4148 /// type may also be canonical.
4149 ///
4150 /// Instances of this type are allocated with a trailing array of
4151 /// TemplateArguments, followed by a QualType representing the
4152 /// non-canonical aliased type when the template is a type alias
4153 /// template.
4154 class LLVM_ALIGNAS(/*alignof(uint64_t)*/ 8) TemplateSpecializationType
4155  : public Type,
4156  public llvm::FoldingSetNode {
4157  /// The name of the template being specialized. This is
4158  /// either a TemplateName::Template (in which case it is a
4159  /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a
4160  /// TypeAliasTemplateDecl*), a
4161  /// TemplateName::SubstTemplateTemplateParmPack, or a
4162  /// TemplateName::SubstTemplateTemplateParm (in which case the
4163  /// replacement must, recursively, be one of these).
4164  TemplateName Template;
4165 
4166  /// The number of template arguments named in this class template
4167  /// specialization.
4168  unsigned NumArgs : 31;
4169 
4170  /// Whether this template specialization type is a substituted type alias.
4171  unsigned TypeAlias : 1;
4172 
4175  QualType Canon,
4176  QualType Aliased);
4177 
4178  friend class ASTContext; // ASTContext creates these
4179 
4180 public:
4181  /// Determine whether any of the given template arguments are dependent.
4183  bool &InstantiationDependent);
4184 
4186  bool &InstantiationDependent);
4187 
4188  /// \brief Print a template argument list, including the '<' and '>'
4189  /// enclosing the template arguments.
4190  static void PrintTemplateArgumentList(raw_ostream &OS,
4192  const PrintingPolicy &Policy,
4193  bool SkipBrackets = false);
4194 
4195  static void PrintTemplateArgumentList(raw_ostream &OS,
4197  const PrintingPolicy &Policy);
4198 
4199  static void PrintTemplateArgumentList(raw_ostream &OS,
4200  const TemplateArgumentListInfo &,
4201  const PrintingPolicy &Policy);
4202 
4203  /// True if this template specialization type matches a current
4204  /// instantiation in the context in which it is found.
4205  bool isCurrentInstantiation() const {
4206  return isa<InjectedClassNameType>(getCanonicalTypeInternal());
4207  }
4208 
4209  /// \brief Determine if this template specialization type is for a type alias
4210  /// template that has been substituted.
4211  ///
4212  /// Nearly every template specialization type whose template is an alias
4213  /// template will be substituted. However, this is not the case when
4214  /// the specialization contains a pack expansion but the template alias
4215  /// does not have a corresponding parameter pack, e.g.,
4216  ///
4217  /// \code
4218  /// template<typename T, typename U, typename V> struct S;
4219  /// template<typename T, typename U> using A = S<T, int, U>;
4220  /// template<typename... Ts> struct X {
4221  /// typedef A<Ts...> type; // not a type alias
4222  /// };
4223  /// \endcode
4224  bool isTypeAlias() const { return TypeAlias; }
4225 
4226  /// Get the aliased type, if this is a specialization of a type alias
4227  /// template.
4229  assert(isTypeAlias() && "not a type alias template specialization");
4230  return *reinterpret_cast<const QualType*>(end());
4231  }
4232 
4233  typedef const TemplateArgument * iterator;
4234 
4235  iterator begin() const { return getArgs(); }
4236  iterator end() const; // defined inline in TemplateBase.h
4237 
4238  /// Retrieve the name of the template that we are specializing.
4239  TemplateName getTemplateName() const { return Template; }
4240 
4241  /// Retrieve the template arguments.
4242  const TemplateArgument *getArgs() const {
4243  return reinterpret_cast<const TemplateArgument *>(this + 1);
4244  }
4245 
4246  /// Retrieve the number of template arguments.
4247  unsigned getNumArgs() const { return NumArgs; }
4248 
4249  /// Retrieve a specific template argument as a type.
4250  /// \pre \c isArgType(Arg)
4251  const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
4252 
4254  return {getArgs(), NumArgs};
4255  }
4256 
4257  bool isSugared() const {
4259  }
4261 
4262  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
4263  Profile(ID, Template, template_arguments(), Ctx);
4264  if (isTypeAlias())
4265  getAliasedType().Profile(ID);
4266  }
4267 
4268  static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T,
4269  ArrayRef<TemplateArgument> Args,
4270  const ASTContext &Context);
4271 
4272  static bool classof(const Type *T) {
4273  return T->getTypeClass() == TemplateSpecialization;
4274  }
4275 };
4276 
4277 /// The injected class name of a C++ class template or class
4278 /// template partial specialization. Used to record that a type was
4279 /// spelled with a bare identifier rather than as a template-id; the
4280 /// equivalent for non-templated classes is just RecordType.
4281 ///
4282 /// Injected class name types are always dependent. Template
4283 /// instantiation turns these into RecordTypes.
4284 ///
4285 /// Injected class name types are always canonical. This works
4286 /// because it is impossible to compare an injected class name type
4287 /// with the corresponding non-injected template type, for the same
4288 /// reason that it is impossible to directly compare template
4289 /// parameters from different dependent contexts: injected class name
4290 /// types can only occur within the scope of a particular templated
4291 /// declaration, and within that scope every template specialization
4292 /// will canonicalize to the injected class name (when appropriate
4293 /// according to the rules of the language).
4294 class InjectedClassNameType : public Type {
4296 
4297  /// The template specialization which this type represents.
4298  /// For example, in
4299  /// template <class T> class A { ... };
4300  /// this is A<T>, whereas in
4301  /// template <class X, class Y> class A<B<X,Y> > { ... };
4302  /// this is A<B<X,Y> >.
4303  ///
4304  /// It is always unqualified, always a template specialization type,
4305  /// and always dependent.
4306  QualType InjectedType;
4307 
4308  friend class ASTContext; // ASTContext creates these.
4309  friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not
4310  // currently suitable for AST reading, too much
4311  // interdependencies.
4312  friend class ASTNodeImporter;
4313 
4315  : Type(InjectedClassName, QualType(), /*Dependent=*/true,
4316  /*InstantiationDependent=*/true,
4317  /*VariablyModified=*/false,
4318  /*ContainsUnexpandedParameterPack=*/false),
4319  Decl(D), InjectedType(TST) {
4320  assert(isa<TemplateSpecializationType>(TST));
4321  assert(!TST.hasQualifiers());
4322  assert(TST->isDependentType());
4323  }
4324 
4325 public:
4326  QualType getInjectedSpecializationType() const { return InjectedType; }
4328  return cast<TemplateSpecializationType>(InjectedType.getTypePtr());
4329  }
4330 
4331  CXXRecordDecl *getDecl() const;
4332 
4333  bool isSugared() const { return false; }
4334  QualType desugar() const { return QualType(this, 0); }
4335 
4336  static bool classof(const Type *T) {
4337  return T->getTypeClass() == InjectedClassName;
4338  }
4339 };
4340 
4341 /// \brief The kind of a tag type.
4343  /// \brief The "struct" keyword.
4345  /// \brief The "__interface" keyword.
4347  /// \brief The "union" keyword.
4349  /// \brief The "class" keyword.
4351  /// \brief The "enum" keyword.
4353 };
4354 
4355 /// \brief The elaboration keyword that precedes a qualified type name or
4356 /// introduces an elaborated-type-specifier.
4358  /// \brief The "struct" keyword introduces the elaborated-type-specifier.
4360  /// \brief The "__interface" keyword introduces the elaborated-type-specifier.
4362  /// \brief The "union" keyword introduces the elaborated-type-specifier.
4364  /// \brief The "class" keyword introduces the elaborated-type-specifier.
4366  /// \brief The "enum" keyword introduces the elaborated-type-specifier.
4368  /// \brief The "typename" keyword precedes the qualified type name, e.g.,
4369  /// \c typename T::type.
4371  /// \brief No keyword precedes the qualified type name.
4373 };
4374 
4375 /// A helper class for Type nodes having an ElaboratedTypeKeyword.
4376 /// The keyword in stored in the free bits of the base class.
4377 /// Also provides a few static helpers for converting and printing
4378 /// elaborated type keyword and tag type kind enumerations.
4379 class TypeWithKeyword : public Type {
4380 protected:
4382  QualType Canonical, bool Dependent,
4383  bool InstantiationDependent, bool VariablyModified,
4384  bool ContainsUnexpandedParameterPack)
4385  : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
4386  ContainsUnexpandedParameterPack) {
4387  TypeWithKeywordBits.Keyword = Keyword;
4388  }
4389 
4390 public:
4392  return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword);
4393  }
4394 
4395  /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword.
4396  static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec);
4397 
4398  /// Converts a type specifier (DeclSpec::TST) into a tag type kind.
4399  /// It is an error to provide a type specifier which *isn't* a tag kind here.
4400  static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec);
4401 
4402  /// Converts a TagTypeKind into an elaborated type keyword.
4403  static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag);
4404 
4405  /// Converts an elaborated type keyword into a TagTypeKind.
4406  /// It is an error to provide an elaborated type keyword
4407  /// which *isn't* a tag kind here.
4408  static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword);
4409 
4410  static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword);
4411 
4412  static StringRef getKeywordName(ElaboratedTypeKeyword Keyword);
4413 
4415  return getKeywordName(getKeywordForTagTypeKind(Kind));
4416  }
4417 
4419  static CannotCastToThisType classof(const Type *);
4420 };
4421 
4422 /// \brief Represents a type that was referred to using an elaborated type
4423 /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type,
4424 /// or both.
4425 ///
4426 /// This type is used to keep track of a type name as written in the
4427 /// source code, including tag keywords and any nested-name-specifiers.
4428 /// The type itself is always "sugar", used to express what was written
4429 /// in the source code but containing no additional semantic information.
4430 class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode {
4431 
4432  /// The nested name specifier containing the qualifier.
4433  NestedNameSpecifier *NNS;
4434 
4435  /// The type that this qualified name refers to.
4436  QualType NamedType;
4437 
4439  QualType NamedType, QualType CanonType)
4440  : TypeWithKeyword(Keyword, Elaborated, CanonType,
4441  NamedType->isDependentType(),
4442  NamedType->isInstantiationDependentType(),
4443  NamedType->isVariablyModifiedType(),
4444  NamedType->containsUnexpandedParameterPack()),
4445  NNS(NNS), NamedType(NamedType) {
4446  assert(!(Keyword == ETK_None && NNS == nullptr) &&
4447  "ElaboratedType cannot have elaborated type keyword "
4448  "and name qualifier both null.");
4449  }
4450 
4451  friend class ASTContext; // ASTContext creates these
4452 
4453 public:
4454  ~ElaboratedType();
4455 
4456  /// Retrieve the qualification on this type.
4457  NestedNameSpecifier *getQualifier() const { return NNS; }
4458 
4459  /// Retrieve the type named by the qualified-id.
4460  QualType getNamedType() const { return NamedType; }
4461 
4462  /// Remove a single level of sugar.
4463  QualType desugar() const { return getNamedType(); }
4464 
4465  /// Returns whether this type directly provides sugar.
4466  bool isSugared() const { return true; }
4467 
4468  void Profile(llvm::FoldingSetNodeID &ID) {
4469  Profile(ID, getKeyword(), NNS, NamedType);
4470  }
4471 
4472  static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
4473  NestedNameSpecifier *NNS, QualType NamedType) {
4474  ID.AddInteger(Keyword);
4475  ID.AddPointer(NNS);
4476  NamedType.Profile(ID);
4477  }
4478 
4479  static bool classof(const Type *T) {
4480  return T->getTypeClass() == Elaborated;
4481  }
4482 };
4483 
4484 /// \brief Represents a qualified type name for which the type name is
4485 /// dependent.
4486 ///
4487 /// DependentNameType represents a class of dependent types that involve a
4488 /// possibly dependent nested-name-specifier (e.g., "T::") followed by a
4489 /// name of a type. The DependentNameType may start with a "typename" (for a
4490 /// typename-specifier), "class", "struct", "union", or "enum" (for a
4491 /// dependent elaborated-type-specifier), or nothing (in contexts where we
4492 /// know that we must be referring to a type, e.g., in a base class specifier).
4493 /// Typically the nested-name-specifier is dependent, but in MSVC compatibility
4494 /// mode, this type is used with non-dependent names to delay name lookup until
4495 /// instantiation.
4496 class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
4497 
4498  /// \brief The nested name specifier containing the qualifier.
4499  NestedNameSpecifier *NNS;
4500 
4501  /// \brief The type that this typename specifier refers to.
4502  const IdentifierInfo *Name;
4503 
4505  const IdentifierInfo *Name, QualType CanonType)
4506  : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true,
4507  /*InstantiationDependent=*/true,
4508  /*VariablyModified=*/false,
4510  NNS(NNS), Name(Name) {}
4511 
4512  friend class ASTContext; // ASTContext creates these
4513 
4514 public:
4515  /// Retrieve the qualification on this type.
4516  NestedNameSpecifier *getQualifier() const { return NNS; }
4517 
4518  /// Retrieve the type named by the typename specifier as an identifier.
4519  ///
4520  /// This routine will return a non-NULL identifier pointer when the
4521  /// form of the original typename was terminated by an identifier,
4522  /// e.g., "typename T::type".
4524  return Name;
4525  }
4526 
4527  bool isSugared() const { return false; }
4528  QualType desugar() const { return QualType(this, 0); }
4529 
4530  void Profile(llvm::FoldingSetNodeID &ID) {
4531  Profile(ID, getKeyword(), NNS, Name);
4532  }
4533 
4534  static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
4535  NestedNameSpecifier *NNS, const IdentifierInfo *Name) {
4536  ID.AddInteger(Keyword);
4537  ID.AddPointer(NNS);
4538  ID.AddPointer(Name);
4539  }
4540 
4541  static bool classof(const Type *T) {
4542  return T->getTypeClass() == DependentName;
4543  }
4544 };
4545 
4546 /// Represents a template specialization type whose template cannot be
4547 /// resolved, e.g.
4548 /// A<T>::template B<T>
4550  : public TypeWithKeyword,
4551  public llvm::FoldingSetNode {
4552 
4553  /// The nested name specifier containing the qualifier.
4554  NestedNameSpecifier *NNS;
4555 
4556  /// The identifier of the template.
4557  const IdentifierInfo *Name;
4558 
4559  /// \brief The number of template arguments named in this class template
4560  /// specialization.
4561  unsigned NumArgs;
4562 
4564  return reinterpret_cast<const TemplateArgument*>(this+1);
4565  }
4566  TemplateArgument *getArgBuffer() {
4567  return reinterpret_cast<TemplateArgument*>(this+1);
4568  }
4569 
4571  NestedNameSpecifier *NNS,
4572  const IdentifierInfo *Name,
4573  ArrayRef<TemplateArgument> Args,
4574  QualType Canon);
4575 
4576  friend class ASTContext; // ASTContext creates these
4577 
4578 public:
4579  NestedNameSpecifier *getQualifier() const { return NNS; }
4580  const IdentifierInfo *getIdentifier() const { return Name; }
4581 
4582  /// \brief Retrieve the template arguments.
4583  const TemplateArgument *getArgs() const {
4584  return getArgBuffer();
4585  }
4586 
4587  /// \brief Retrieve the number of template arguments.
4588  unsigned getNumArgs() const { return NumArgs; }
4589 
4590  const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
4591 
4592  ArrayRef<TemplateArgument> template_arguments() const {
4593  return {getArgs(), NumArgs};
4594  }
4595 
4596  typedef const TemplateArgument * iterator;
4597  iterator begin() const { return getArgs(); }
4598  iterator end() const; // inline in TemplateBase.h
4599 
4600  bool isSugared() const { return false; }
4601  QualType desugar() const { return QualType(this, 0); }
4602 
4603  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
4604  Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), NumArgs});
4605  }
4606 
4607  static void Profile(llvm::FoldingSetNodeID &ID,
4608  const ASTContext &Context,
4609  ElaboratedTypeKeyword Keyword,
4610  NestedNameSpecifier *Qualifier,
4611  const IdentifierInfo *Name,
4612  ArrayRef<TemplateArgument> Args);
4613 
4614  static bool classof(const Type *T) {
4615  return T->getTypeClass() == DependentTemplateSpecialization;
4616  }
4617 };
4618 
4619 /// \brief Represents a pack expansion of types.
4620 ///
4621 /// Pack expansions are part of C++11 variadic templates. A pack
4622 /// expansion contains a pattern, which itself contains one or more
4623 /// "unexpanded" parameter packs. When instantiated, a pack expansion
4624 /// produces a series of types, each instantiated from the pattern of
4625 /// the expansion, where the Ith instantiation of the pattern uses the
4626 /// Ith arguments bound to each of the unexpanded parameter packs. The
4627 /// pack expansion is considered to "expand" these unexpanded
4628 /// parameter packs.
4629 ///
4630 /// \code
4631 /// template<typename ...Types> struct tuple;
4632 ///
4633 /// template<typename ...Types>
4634 /// struct tuple_of_references {
4635 /// typedef tuple<Types&...> type;
4636 /// };
4637 /// \endcode
4638 ///
4639 /// Here, the pack expansion \c Types&... is represented via a
4640 /// PackExpansionType whose pattern is Types&.
4641 class PackExpansionType : public Type, public llvm::FoldingSetNode {
4642  /// \brief The pattern of the pack expansion.
4643  QualType Pattern;
4644 
4645  /// \brief The number of expansions that this pack expansion will
4646  /// generate when substituted (+1), or indicates that
4647  ///
4648  /// This field will only have a non-zero value when some of the parameter
4649  /// packs that occur within the pattern have been substituted but others have
4650  /// not.
4651  unsigned NumExpansions;
4652 
4653  PackExpansionType(QualType Pattern, QualType Canon,
4654  Optional<unsigned> NumExpansions)
4655  : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(),
4656  /*InstantiationDependent=*/true,
4657  /*VariablyModified=*/Pattern->isVariablyModifiedType(),
4658  /*ContainsUnexpandedParameterPack=*/false),
4659  Pattern(Pattern),
4660  NumExpansions(NumExpansions? *NumExpansions + 1: 0) { }
4661 
4662  friend class ASTContext; // ASTContext creates these
4663 
4664 public:
4665  /// \brief Retrieve the pattern of this pack expansion, which is the
4666  /// type that will be repeatedly instantiated when instantiating the
4667  /// pack expansion itself.
4668  QualType getPattern() const { return Pattern; }
4669 
4670  /// \brief Retrieve the number of expansions that this pack expansion will
4671  /// generate, if known.
4673  if (NumExpansions)
4674  return NumExpansions - 1;
4675 
4676  return None;
4677  }
4678 
4679  bool isSugared() const { return !Pattern->isDependentType(); }
4680  QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); }
4681 
4682  void Profile(llvm::FoldingSetNodeID &ID) {
4683  Profile(ID, getPattern(), getNumExpansions());
4684  }
4685 
4686  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
4687  Optional<unsigned> NumExpansions) {
4688  ID.AddPointer(Pattern.getAsOpaquePtr());
4689  ID.AddBoolean(NumExpansions.hasValue());
4690  if (NumExpansions)
4691  ID.AddInteger(*NumExpansions);
4692  }
4693 
4694  static bool classof(const Type *T) {
4695  return T->getTypeClass() == PackExpansion;
4696  }
4697 };
4698 
4699 /// Represents a class type in Objective C.
4700 ///
4701 /// Every Objective C type is a combination of a base type, a set of
4702 /// type arguments (optional, for parameterized classes) and a list of
4703 /// protocols.
4704 ///
4705 /// Given the following declarations:
4706 /// \code
4707 /// \@class C<T>;
4708 /// \@protocol P;
4709 /// \endcode
4710 ///
4711 /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType
4712 /// with base C and no protocols.
4713 ///
4714 /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P].
4715 /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no
4716 /// protocol list.
4717 /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*',
4718 /// and protocol list [P].
4719 ///
4720 /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose
4721 /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType
4722 /// and no protocols.
4723 ///
4724 /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType
4725 /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually
4726 /// this should get its own sugar class to better represent the source.
4727 class ObjCObjectType : public Type {
4728  // ObjCObjectType.NumTypeArgs - the number of type arguments stored
4729  // after the ObjCObjectPointerType node.
4730  // ObjCObjectType.NumProtocols - the number of protocols stored
4731  // after the type arguments of ObjCObjectPointerType node.
4732  //
4733  // These protocols are those written directly on the type. If
4734  // protocol qualifiers ever become additive, the iterators will need
4735  // to get kindof complicated.
4736  //
4737  // In the canonical object type, these are sorted alphabetically
4738  // and uniqued.
4739 
4740  /// Either a BuiltinType or an InterfaceType or sugar for either.
4741  QualType BaseType;
4742 
4743  /// Cached superclass type.
4744  mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool>
4745  CachedSuperClassType;
4746 
4747  ObjCProtocolDecl * const *getProtocolStorage() const {
4748  return const_cast<ObjCObjectType*>(this)->getProtocolStorage();
4749  }
4750 
4751  QualType *getTypeArgStorage();
4752  const QualType *getTypeArgStorage() const {
4753  return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();
4754  }
4755 
4756  ObjCProtocolDecl **getProtocolStorage();
4757 
4758 protected:
4759  ObjCObjectType(QualType Canonical, QualType Base,
4760  ArrayRef<QualType> typeArgs,
4761  ArrayRef<ObjCProtocolDecl *> protocols,
4762  bool isKindOf);
4763 
4766  : Type(ObjCInterface, QualType(), false, false, false, false),
4767  BaseType(QualType(this_(), 0)) {
4768  ObjCObjectTypeBits.NumProtocols = 0;
4769  ObjCObjectTypeBits.NumTypeArgs = 0;
4770  ObjCObjectTypeBits.IsKindOf = 0;
4771  }
4772 
4773  void computeSuperClassTypeSlow() const;
4774 
4775 public:
4776  /// Gets the base type of this object type. This is always (possibly
4777  /// sugar for) one of:
4778  /// - the 'id' builtin type (as opposed to the 'id' type visible to the
4779  /// user, which is a typedef for an ObjCObjectPointerType)
4780  /// - the 'Class' builtin type (same caveat)
4781  /// - an ObjCObjectType (currently always an ObjCInterfaceType)
4782  QualType getBaseType() const { return BaseType; }
4783 
4784  bool isObjCId() const {
4785  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId);
4786  }
4787  bool isObjCClass() const {
4788  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass);
4789  }
4790  bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); }
4791  bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); }
4793  if (!qual_empty()) return false;
4794  if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>())
4795  return T->getKind() == BuiltinType::ObjCId ||
4796  T->getKind() == BuiltinType::ObjCClass;
4797  return false;
4798  }
4799  bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); }
4800  bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); }
4801 
4802  /// Gets the interface declaration for this object type, if the base type
4803  /// really is an interface.
4804  ObjCInterfaceDecl *getInterface() const;
4805 
4806  /// Determine whether this object type is "specialized", meaning
4807  /// that it has type arguments.
4808  bool isSpecialized() const;
4809 
4810  /// Determine whether this object type was written with type arguments.
4811  bool isSpecializedAsWritten() const {
4812  return ObjCObjectTypeBits.NumTypeArgs > 0;
4813  }
4814 
4815  /// Determine whether this object type is "unspecialized", meaning
4816  /// that it has no type arguments.
4817  bool isUnspecialized() const { return !isSpecialized(); }
4818 
4819  /// Determine whether this object type is "unspecialized" as
4820  /// written, meaning that it has no type arguments.
4821  bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }
4822 
4823  /// Retrieve the type arguments of this object type (semantically).
4824  ArrayRef<QualType> getTypeArgs() const;
4825 
4826  /// Retrieve the type arguments of this object type as they were
4827  /// written.
4829  return llvm::makeArrayRef(getTypeArgStorage(),
4830  ObjCObjectTypeBits.NumTypeArgs);
4831  }
4832 
4834  typedef llvm::iterator_range<qual_iterator> qual_range;
4835 
4836  qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
4837  qual_iterator qual_begin() const { return getProtocolStorage(); }
4838  qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }
4839 
4840  bool qual_empty() const { return getNumProtocols() == 0; }
4841 
4842  /// Return the number of qualifying protocols in this interface type,
4843  /// or 0 if there are none.
4844  unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; }
4845 
4846  /// Fetch a protocol by index.
4847  ObjCProtocolDecl *getProtocol(unsigned I) const {
4848  assert(I < getNumProtocols() && "Out-of-range protocol access");
4849  return qual_begin()[I];
4850  }
4851 
4852  /// Retrieve all of the protocol qualifiers.
4854  return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());
4855  }
4856 
4857  /// Whether this is a "__kindof" type as written.
4858  bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }
4859 
4860  /// Whether this ia a "__kindof" type (semantically).
4861  bool isKindOfType() const;
4862 
4863  /// Retrieve the type of the superclass of this object type.
4864  ///
4865  /// This operation substitutes any type arguments into the
4866  /// superclass of the current class type, potentially producing a
4867  /// specialization of the superclass type. Produces a null type if
4868  /// there is no superclass.
4870  if (!CachedSuperClassType.getInt())
4871  computeSuperClassTypeSlow();
4872 
4873  assert(CachedSuperClassType.getInt() && "Superclass not set?");
4874  return QualType(CachedSuperClassType.getPointer(), 0);
4875  }
4876 
4877  /// Strip off the Objective-C "kindof" type and (with it) any
4878  /// protocol qualifiers.
4879  QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const;
4880 
4881  bool isSugared() const { return false; }
4882  QualType desugar() const { return QualType(this, 0); }
4883 
4884  static bool classof(const Type *T) {
4885  return T->getTypeClass() == ObjCObject ||
4886  T->getTypeClass() == ObjCInterface;
4887  }
4888 };
4889 
4890 /// A class providing a concrete implementation
4891 /// of ObjCObjectType, so as to not increase the footprint of
4892 /// ObjCInterfaceType. Code outside of ASTContext and the core type
4893 /// system should not reference this type.
4894 class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode {
4895  friend class ASTContext;
4896 
4897  // If anyone adds fields here, ObjCObjectType::getProtocolStorage()
4898  // will need to be modified.
4899 
4901  ArrayRef<QualType> typeArgs,
4902  ArrayRef<ObjCProtocolDecl *> protocols,
4903  bool isKindOf)
4904  : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {}
4905 
4906 public:
4907  void Profile(llvm::FoldingSetNodeID &ID);
4908  static void Profile(llvm::FoldingSetNodeID &ID,
4909  QualType Base,
4910  ArrayRef<QualType> typeArgs,
4911  ArrayRef<ObjCProtocolDecl *> protocols,
4912  bool isKindOf);
4913 };
4914 
4915 inline QualType *ObjCObjectType::getTypeArgStorage() {
4916  return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1);
4917 }
4918 
4919 inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() {
4920  return reinterpret_cast<ObjCProtocolDecl**>(
4921  getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs);
4922 }
4923 
4924 /// Interfaces are the core concept in Objective-C for object oriented design.
4925 /// They basically correspond to C++ classes. There are two kinds of interface
4926 /// types: normal interfaces like `NSString`, and qualified interfaces, which
4927 /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`.
4928 ///
4929 /// ObjCInterfaceType guarantees the following properties when considered
4930 /// as a subtype of its superclass, ObjCObjectType:
4931 /// - There are no protocol qualifiers. To reinforce this, code which
4932 /// tries to invoke the protocol methods via an ObjCInterfaceType will
4933 /// fail to compile.
4934 /// - It is its own base type. That is, if T is an ObjCInterfaceType*,
4935 /// T->getBaseType() == QualType(T, 0).
4937  mutable ObjCInterfaceDecl *Decl;
4938 
4941  Decl(const_cast<ObjCInterfaceDecl*>(D)) {}
4942  friend class ASTContext; // ASTContext creates these.
4943  friend class ASTReader;
4944  friend class ObjCInterfaceDecl;
4945 
4946 public:
4947  /// Get the declaration of this interface.
4948  ObjCInterfaceDecl *getDecl() const { return Decl; }
4949 
4950  bool isSugared() const { return false; }
4951  QualType desugar() const { return QualType(this, 0); }
4952 
4953  static bool classof(const Type *T) {
4954  return T->getTypeClass() == ObjCInterface;
4955  }
4956 
4957  // Nonsense to "hide" certain members of ObjCObjectType within this
4958  // class. People asking for protocols on an ObjCInterfaceType are
4959  // not going to get what they want: ObjCInterfaceTypes are
4960  // guaranteed to have no protocols.
4961  enum {
4966  getProtocol
4967  };
4968 };
4969 
4971  QualType baseType = getBaseType();
4972  while (const ObjCObjectType *ObjT = baseType->getAs<ObjCObjectType>()) {
4973  if (const ObjCInterfaceType *T = dyn_cast<ObjCInterfaceType>(ObjT))
4974  return T->getDecl();
4975 
4976  baseType = ObjT->getBaseType();
4977  }
4978 
4979  return nullptr;
4980 }
4981 
4982 /// Represents a pointer to an Objective C object.
4983 ///
4984 /// These are constructed from pointer declarators when the pointee type is
4985 /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class'
4986 /// types are typedefs for these, and the protocol-qualified types 'id<P>'
4987 /// and 'Class<P>' are translated into these.
4988 ///
4989 /// Pointers to pointers to Objective C objects are still PointerTypes;
4990 /// only the first level of pointer gets it own type implementation.
4991 class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode {
4992  QualType PointeeType;
4993 
4994  ObjCObjectPointerType(QualType Canonical, QualType Pointee)
4995  : Type(ObjCObjectPointer, Canonical,
4996  Pointee->isDependentType(),
4997  Pointee->isInstantiationDependentType(),
4998  Pointee->isVariablyModifiedType(),
4999  Pointee->containsUnexpandedParameterPack()),
5000  PointeeType(Pointee) {}
5001  friend class ASTContext; // ASTContext creates these.
5002 
5003 public:
5004  /// Gets the type pointed to by this ObjC pointer.
5005  /// The result will always be an ObjCObjectType or sugar thereof.
5006  QualType getPointeeType() const { return PointeeType; }
5007 
5008  /// Gets the type pointed to by this ObjC pointer. Always returns non-null.
5009  ///
5010  /// This method is equivalent to getPointeeType() except that
5011  /// it discards any typedefs (or other sugar) between this
5012  /// type and the "outermost" object type. So for:
5013  /// \code
5014  /// \@class A; \@protocol P; \@protocol Q;
5015  /// typedef A<P> AP;
5016  /// typedef A A1;
5017  /// typedef A1<P> A1P;
5018  /// typedef A1P<Q> A1PQ;
5019  /// \endcode
5020  /// For 'A*', getObjectType() will return 'A'.
5021  /// For 'A<P>*', getObjectType() will return 'A<P>'.
5022  /// For 'AP*', getObjectType() will return 'A<P>'.
5023  /// For 'A1*', getObjectType() will return 'A'.
5024  /// For 'A1<P>*', getObjectType() will return 'A1<P>'.
5025  /// For 'A1P*', getObjectType() will return 'A1<P>'.
5026  /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because
5027  /// adding protocols to a protocol-qualified base discards the
5028  /// old qualifiers (for now). But if it didn't, getObjectType()
5029  /// would return 'A1P<Q>' (and we'd have to make iterating over
5030  /// qualifiers more complicated).
5032  return PointeeType->castAs<ObjCObjectType>();
5033  }
5034 
5035  /// If this pointer points to an Objective C
5036  /// \@interface type, gets the type for that interface. Any protocol
5037  /// qualifiers on the interface are ignored.
5038  ///
5039  /// \return null if the base type for this pointer is 'id' or 'Class'
5040  const ObjCInterfaceType *getInterfaceType() const;
5041 
5042  /// If this pointer points to an Objective \@interface
5043  /// type, gets the declaration for that interface.
5044  ///
5045  /// \return null if the base type for this pointer is 'id' or 'Class'
5047  return getObjectType()->getInterface();
5048  }
5049 
5050  /// True if this is equivalent to the 'id' type, i.e. if
5051  /// its object type is the primitive 'id' type with no protocols.
5052  bool isObjCIdType() const {
5053  return getObjectType()->isObjCUnqualifiedId();
5054  }
5055 
5056  /// True if this is equivalent to the 'Class' type,
5057  /// i.e. if its object tive is the primitive 'Class' type with no protocols.
5058  bool isObjCClassType() const {
5059  return getObjectType()->isObjCUnqualifiedClass();
5060  }
5061 
5062  /// True if this is equivalent to the 'id' or 'Class' type,
5063  bool isObjCIdOrClassType() const {
5064  return getObjectType()->isObjCUnqualifiedIdOrClass();
5065  }
5066 
5067  /// True if this is equivalent to 'id<P>' for some non-empty set of
5068  /// protocols.
5069  bool isObjCQualifiedIdType() const {
5070  return getObjectType()->isObjCQualifiedId();
5071  }
5072 
5073  /// True if this is equivalent to 'Class<P>' for some non-empty set of
5074  /// protocols.
5076  return getObjectType()->isObjCQualifiedClass();
5077  }
5078 
5079  /// Whether this is a "__kindof" type.
5080  bool isKindOfType() const { return getObjectType()->isKindOfType(); }
5081 
5082  /// Whether this type is specialized, meaning that it has type arguments.
5083  bool isSpecialized() const { return getObjectType()->isSpecialized(); }
5084 
5085  /// Whether this type is specialized, meaning that it has type arguments.
5086  bool isSpecializedAsWritten() const {
5087  return getObjectType()->isSpecializedAsWritten();
5088  }
5089 
5090  /// Whether this type is unspecialized, meaning that is has no type arguments.
5091  bool isUnspecialized() const { return getObjectType()->isUnspecialized(); }
5092 
5093  /// Determine whether this object type is "unspecialized" as
5094  /// written, meaning that it has no type arguments.
5095  bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }
5096 
5097  /// Retrieve the type arguments for this type.
5099  return getObjectType()->getTypeArgs();
5100  }
5101 
5102  /// Retrieve the type arguments for this type.
5104  return getObjectType()->getTypeArgsAsWritten();
5105  }
5106 
5107  /// An iterator over the qualifiers on the object type. Provided
5108  /// for convenience. This will always iterate over the full set of
5109  /// protocols on a type, not just those provided directly.
5111  typedef llvm::iterator_range<qual_iterator> qual_range;
5112 
5113  qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
5115  return getObjectType()->qual_begin();
5116  }
5118  return getObjectType()->qual_end();
5119  }
5120  bool qual_empty() const { return getObjectType()->qual_empty(); }
5121 
5122  /// Return the number of qualifying protocols on the object type.
5123  unsigned getNumProtocols() const {
5124  return getObjectType()->getNumProtocols();
5125  }
5126 
5127  /// Retrieve a qualifying protocol by index on the object type.
5128  ObjCProtocolDecl *getProtocol(unsigned I) const {
5129  return getObjectType()->getProtocol(I);
5130  }
5131 
5132  bool isSugared() const { return false; }
5133  QualType desugar() const { return QualType(this, 0); }
5134 
5135  /// Retrieve the type of the superclass of this object pointer type.
5136  ///
5137  /// This operation substitutes any type arguments into the
5138  /// superclass of the current class type, potentially producing a
5139  /// pointer to a specialization of the superclass type. Produces a
5140  /// null type if there is no superclass.
5141  QualType getSuperClassType() const;
5142 
5143  /// Strip off the Objective-C "kindof" type and (with it) any
5144  /// protocol qualifiers.
5145  const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals(
5146  const ASTContext &ctx) const;
5147 
5148  void Profile(llvm::FoldingSetNodeID &ID) {
5149  Profile(ID, getPointeeType());
5150  }
5151  static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
5152  ID.AddPointer(T.getAsOpaquePtr());
5153  }
5154  static bool classof(const Type *T) {
5155  return T->getTypeClass() == ObjCObjectPointer;
5156  }
5157 };
5158 
5159 class AtomicType : public Type, public llvm::FoldingSetNode {
5160  QualType ValueType;
5161 
5162  AtomicType(QualType ValTy, QualType Canonical)
5163  : Type(Atomic, Canonical, ValTy->isDependentType(),
5165  ValTy->isVariablyModifiedType(),
5167  ValueType(ValTy) {}
5168  friend class ASTContext; // ASTContext creates these.
5169 
5170  public:
5171  /// Gets the type contained by this atomic type, i.e.
5172  /// the type returned by performing an atomic load of this atomic type.
5173  QualType getValueType() const { return ValueType; }
5174 
5175  bool isSugared() const { return false; }
5176  QualType desugar() const { return QualType(this, 0); }
5177 
5178  void Profile(llvm::FoldingSetNodeID &ID) {
5179  Profile(ID, getValueType());
5180  }
5181  static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
5182  ID.AddPointer(T.getAsOpaquePtr());
5183  }
5184  static bool classof(const Type *T) {
5185  return T->getTypeClass() == Atomic;
5186  }
5187 };
5188 
5189 /// PipeType - OpenCL20.
5190 class PipeType : public Type, public llvm::FoldingSetNode {
5191  QualType ElementType;
5192 
5193  PipeType(QualType elemType, QualType CanonicalPtr) :
5194  Type(Pipe, CanonicalPtr, elemType->isDependentType(),
5195  elemType->isInstantiationDependentType(),
5196  elemType->isVariablyModifiedType(),
5197  elemType->containsUnexpandedParameterPack()),
5198  ElementType(elemType) {}
5199  friend class ASTContext; // ASTContext creates these.
5200 
5201 public:
5202 
5203  QualType getElementType() const { return ElementType; }
5204 
5205  bool isSugared() const { return false; }
5206 
5207  QualType desugar() const { return QualType(this, 0); }
5208 
5209  void Profile(llvm::FoldingSetNodeID &ID) {
5210  Profile(ID, getElementType());
5211  }
5212 
5213  static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
5214  ID.AddPointer(T.getAsOpaquePtr());
5215  }
5216 
5217 
5218  static bool classof(const Type *T) {
5219  return T->getTypeClass() == Pipe;
5220  }
5221 
5222 };
5223 
5224 /// A qualifier set is used to build a set of qualifiers.
5226 public:
5228 
5229  /// Collect any qualifiers on the given type and return an
5230  /// unqualified type. The qualifiers are assumed to be consistent
5231  /// with those already in the type.
5233  addFastQualifiers(type.getLocalFastQualifiers());
5234  if (!type.hasLocalNonFastQualifiers())
5235  return type.getTypePtrUnsafe();
5236 
5237  const ExtQuals *extQuals = type.getExtQualsUnsafe();
5238  addConsistentQualifiers(extQuals->getQualifiers());
5239  return extQuals->getBaseType();
5240  }
5241 
5242  /// Apply the collected qualifiers to the given type.
5243  QualType apply(const ASTContext &Context, QualType QT) const;
5244 
5245  /// Apply the collected qualifiers to the given type.
5246  QualType apply(const ASTContext &Context, const Type* T) const;
5247 };
5248 
5249 
5250 // Inline function definitions.
5251 
5255  desugar.Quals.addConsistentQualifiers(Quals);
5256  return desugar;
5257 }
5258 
5259 inline const Type *QualType::getTypePtr() const {
5260  return getCommonPtr()->BaseType;
5261 }
5262 
5263 inline const Type *QualType::getTypePtrOrNull() const {
5264  return (isNull() ? nullptr : getCommonPtr()->BaseType);
5265 }
5266 
5268  if (!hasLocalNonFastQualifiers())
5269  return SplitQualType(getTypePtrUnsafe(),
5270  Qualifiers::fromFastMask(getLocalFastQualifiers()));
5271 
5272  const ExtQuals *eq = getExtQualsUnsafe();
5273  Qualifiers qs = eq->getQualifiers();
5274  qs.addFastQualifiers(getLocalFastQualifiers());
5275  return SplitQualType(eq->getBaseType(), qs);
5276 }
5277 
5279  Qualifiers Quals;
5280  if (hasLocalNonFastQualifiers())
5281  Quals = getExtQualsUnsafe()->getQualifiers();
5282  Quals.addFastQualifiers(getLocalFastQualifiers());
5283  return Quals;
5284 }
5285 
5287  Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers();
5288  quals.addFastQualifiers(getLocalFastQualifiers());
5289  return quals;
5290 }
5291 
5292 inline unsigned QualType::getCVRQualifiers() const {
5293  unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers();
5294  cvr |= getLocalCVRQualifiers();
5295  return cvr;
5296 }
5297 
5299  QualType canon = getCommonPtr()->CanonicalType;
5300  return canon.withFastQualifiers(getLocalFastQualifiers());
5301 }
5302 
5303 inline bool QualType::isCanonical() const {
5304  return getTypePtr()->isCanonicalUnqualified();
5305 }
5306 
5307 inline bool QualType::isCanonicalAsParam() const {
5308  if (!isCanonical()) return false;
5309  if (hasLocalQualifiers()) return false;
5310 
5311  const Type *T = getTypePtr();
5312  if (T->isVariablyModifiedType() && T->hasSizedVLAType())
5313  return false;
5314 
5315  return !isa<FunctionType>(T) && !isa<ArrayType>(T);
5316 }
5317 
5318 inline bool QualType::isConstQualified() const {
5319  return isLocalConstQualified() ||
5320  getCommonPtr()->CanonicalType.isLocalConstQualified();
5321 }
5322 
5323 inline bool QualType::isRestrictQualified() const {
5324  return isLocalRestrictQualified() ||
5325  getCommonPtr()->CanonicalType.isLocalRestrictQualified();
5326 }
5327 
5328 
5329 inline bool QualType::isVolatileQualified() const {
5330  return isLocalVolatileQualified() ||
5331  getCommonPtr()->CanonicalType.isLocalVolatileQualified();
5332 }
5333 
5334 inline bool QualType::hasQualifiers() const {
5335  return hasLocalQualifiers() ||
5336  getCommonPtr()->CanonicalType.hasLocalQualifiers();
5337 }
5338 
5340  if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
5341  return QualType(getTypePtr(), 0);
5342 
5343  return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0);
5344 }
5345 
5347  if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
5348  return split();
5349 
5350  return getSplitUnqualifiedTypeImpl(*this);
5351 }
5352 
5354  removeLocalFastQualifiers(Qualifiers::Const);
5355 }
5356 
5358  removeLocalFastQualifiers(Qualifiers::Restrict);
5359 }
5360 
5362  removeLocalFastQualifiers(Qualifiers::Volatile);
5363 }
5364 
5365 inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
5366  assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits");
5367  static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
5368  "Fast bits differ from CVR bits!");
5369 
5370  // Fast path: we don't need to touch the slow qualifiers.
5371  removeLocalFastQualifiers(Mask);
5372 }
5373 
5374 /// Return the address space of this type.
5375 inline unsigned QualType::getAddressSpace() const {
5376  return getQualifiers().getAddressSpace();
5377 }
5378 
5379 /// Return the gc attribute of this type.
5381  return getQualifiers().getObjCGCAttr();
5382 }
5383 
5385  if (const PointerType *PT = t.getAs<PointerType>()) {
5386  if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>())
5387  return FT->getExtInfo();
5388  } else if (const FunctionType *FT = t.getAs<FunctionType>())
5389  return FT->getExtInfo();
5390 
5391  return FunctionType::ExtInfo();
5392 }
5393 
5395  return getFunctionExtInfo(*t);
5396 }
5397 
5398 /// Determine whether this type is more
5399 /// qualified than the Other type. For example, "const volatile int"
5400 /// is more qualified than "const int", "volatile int", and
5401 /// "int". However, it is not more qualified than "const volatile
5402 /// int".
5403 inline bool QualType::isMoreQualifiedThan(QualType other) const {
5404  Qualifiers MyQuals = getQualifiers();
5405  Qualifiers OtherQuals = other.getQualifiers();
5406  return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals));
5407 }
5408 
5409 /// Determine whether this type is at last
5410 /// as qualified as the Other type. For example, "const volatile
5411 /// int" is at least as qualified as "const int", "volatile int",
5412 /// "int", and "const volatile int".
5413 inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const {
5414  Qualifiers OtherQuals = other.getQualifiers();
5415 
5416  // Ignore __unaligned qualifier if this type is a void.
5417  if (getUnqualifiedType()->isVoidType())
5418  OtherQuals.removeUnaligned();
5419 
5420  return getQualifiers().compatiblyIncludes(OtherQuals);
5421 }
5422 
5423 /// If Type is a reference type (e.g., const
5424 /// int&), returns the type that the reference refers to ("const
5425 /// int"). Otherwise, returns the type itself. This routine is used
5426 /// throughout Sema to implement C++ 5p6:
5427 ///
5428 /// If an expression initially has the type "reference to T" (8.3.2,
5429 /// 8.5.3), the type is adjusted to "T" prior to any further
5430 /// analysis, the expression designates the object or function
5431 /// denoted by the reference, and the expression is an lvalue.
5433  if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>())
5434  return RefType->getPointeeType();
5435  else
5436  return *this;
5437 }
5438 
5440  return ((getTypePtr()->isVoidType() && !hasQualifiers()) ||
5441  getTypePtr()->isFunctionType());
5442 }
5443 
5444 /// Tests whether the type is categorized as a fundamental type.
5445 ///
5446 /// \returns True for types specified in C++0x [basic.fundamental].
5447 inline bool Type::isFundamentalType() const {
5448  return isVoidType() ||
5449  // FIXME: It's really annoying that we don't have an
5450  // 'isArithmeticType()' which agrees with the standard definition.
5451  (isArithmeticType() && !isEnumeralType());
5452 }
5453 
5454 /// Tests whether the type is categorized as a compound type.
5455 ///
5456 /// \returns True for types specified in C++0x [basic.compound].
5457 inline bool Type::isCompoundType() const {
5458  // C++0x [basic.compound]p1:
5459  // Compound types can be constructed in the following ways:
5460  // -- arrays of objects of a given type [...];
5461  return isArrayType() ||
5462  // -- functions, which have parameters of given types [...];
5463  isFunctionType() ||
5464  // -- pointers to void or objects or functions [...];
5465  isPointerType() ||
5466  // -- references to objects or functions of a given type. [...]
5467  isReferenceType() ||
5468  // -- classes containing a sequence of objects of various types, [...];
5469  isRecordType() ||
5470  // -- unions, which are classes capable of containing objects of different
5471  // types at different times;
5472  isUnionType() ||
5473  // -- enumerations, which comprise a set of named constant values. [...];
5474  isEnumeralType() ||
5475  // -- pointers to non-static class members, [...].
5477 }
5478 
5479 inline bool Type::isFunctionType() const {
5480  return isa<FunctionType>(CanonicalType);
5481 }
5482 inline bool Type::isPointerType() const {
5483  return isa<PointerType>(CanonicalType);
5484 }
5485 inline bool Type::isAnyPointerType() const {
5486  return isPointerType() || isObjCObjectPointerType();
5487 }
5488 inline bool Type::isBlockPointerType() const {
5489  return isa<BlockPointerType>(CanonicalType);
5490 }
5491 inline bool Type::isReferenceType() const {
5492  return isa<ReferenceType>(CanonicalType);
5493 }
5494 inline bool Type::isLValueReferenceType() const {
5495  return isa<LValueReferenceType>(CanonicalType);
5496 }
5497 inline bool Type::isRValueReferenceType() const {
5498  return isa<RValueReferenceType>(CanonicalType);
5499 }
5500 inline bool Type::isFunctionPointerType() const {
5501  if (const PointerType *T = getAs<PointerType>())
5502  return T->getPointeeType()->isFunctionType();
5503  else
5504  return false;
5505 }
5506 inline bool Type::isMemberPointerType() const {
5507  return isa<MemberPointerType>(CanonicalType);
5508 }
5510  if (const MemberPointerType* T = getAs<MemberPointerType>())
5511  return T->isMemberFunctionPointer();
5512  else
5513  return false;
5514 }
5515 inline bool Type::isMemberDataPointerType() const {
5516  if (const MemberPointerType* T = getAs<MemberPointerType>())
5517  return T->isMemberDataPointer();
5518  else
5519  return false;
5520 }
5521 inline bool Type::isArrayType() const {
5522  return isa<ArrayType>(CanonicalType);
5523 }
5524 inline bool Type::isConstantArrayType() const {
5525  return isa<ConstantArrayType>(CanonicalType);
5526 }
5527 inline bool Type::isIncompleteArrayType() const {
5528  return isa<IncompleteArrayType>(CanonicalType);
5529 }
5530 inline bool Type::isVariableArrayType() const {
5531  return isa<VariableArrayType>(CanonicalType);
5532 }
5533 inline bool Type::isDependentSizedArrayType() const {
5534  return isa<DependentSizedArrayType>(CanonicalType);
5535 }
5536 inline bool Type::isBuiltinType() const {
5537  return isa<BuiltinType>(CanonicalType);
5538 }
5539 inline bool Type::isRecordType() const {
5540  return isa<RecordType>(CanonicalType);
5541 }
5542 inline bool Type::isEnumeralType() const {
5543  return isa<EnumType>(CanonicalType);
5544 }
5545 inline bool Type::isAnyComplexType() const {
5546  return isa<ComplexType>(CanonicalType);
5547 }
5548 inline bool Type::isVectorType() const {
5549  return isa<VectorType>(CanonicalType);
5550 }
5551 inline bool Type::isExtVectorType() const {
5552  return isa<ExtVectorType>(CanonicalType);
5553 }
5554 inline bool Type::isObjCObjectPointerType() const {
5555  return isa<ObjCObjectPointerType>(CanonicalType);
5556 }
5557 inline bool Type::isObjCObjectType() const {
5558  return isa<ObjCObjectType>(CanonicalType);
5559 }
5561  return isa<ObjCInterfaceType>(CanonicalType) ||
5562  isa<ObjCObjectType>(CanonicalType);
5563 }
5564 inline bool Type::isAtomicType() const {
5565  return isa<AtomicType>(CanonicalType);
5566 }
5567 
5568 inline bool Type::isObjCQualifiedIdType() const {
5569  if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>())
5570  return OPT->isObjCQualifiedIdType();
5571  return false;
5572 }
5573 inline bool Type::isObjCQualifiedClassType() const {
5574  if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>())
5575  return OPT->isObjCQualifiedClassType();
5576  return false;
5577 }
5578 inline bool Type::isObjCIdType() const {
5579  if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>())
5580  return OPT->isObjCIdType();
5581  return false;
5582 }
5583 inline bool Type::isObjCClassType() const {
5584  if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>())
5585  return OPT->isObjCClassType();
5586  return false;
5587 }
5588 inline bool Type::isObjCSelType() const {
5589  if (const PointerType *OPT = getAs<PointerType>())
5590  return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel);
5591  return false;
5592 }
5593 inline bool Type::isObjCBuiltinType() const {
5594  return isObjCIdType() || isObjCClassType() || isObjCSelType();
5595 }
5596 
5597 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
5598  inline bool Type::is##Id##Type() const { \
5599  return isSpecificBuiltinType(BuiltinType::Id); \
5600  }
5601 #include "clang/Basic/OpenCLImageTypes.def"
5602 
5603 inline bool Type::isSamplerT() const {
5604  return isSpecificBuiltinType(BuiltinType::OCLSampler);
5605 }
5606 
5607 inline bool Type::isEventT() const {
5608  return isSpecificBuiltinType(BuiltinType::OCLEvent);
5609 }
5610 
5611 inline bool Type::isClkEventT() const {
5612  return isSpecificBuiltinType(BuiltinType::OCLClkEvent);
5613 }
5614 
5615 inline bool Type::isQueueT() const {
5616  return isSpecificBuiltinType(BuiltinType::OCLQueue);
5617 }
5618 
5619 inline bool Type::isNDRangeT() const {
5620  return isSpecificBuiltinType(BuiltinType::OCLNDRange);
5621 }
5622 
5623 inline bool Type::isReserveIDT() const {
5624  return isSpecificBuiltinType(BuiltinType::OCLReserveID);
5625 }
5626 
5627 inline bool Type::isImageType() const {
5628 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() ||
5629  return
5630 #include "clang/Basic/OpenCLImageTypes.def"
5631  0; // end boolean or operation
5632 }
5633 
5634 inline bool Type::isPipeType() const {
5635  return isa<PipeType>(CanonicalType);
5636 }
5637 
5638 inline bool Type::isOpenCLSpecificType() const {
5639  return isSamplerT() || isEventT() || isImageType() || isClkEventT() ||
5640  isQueueT() || isNDRangeT() || isReserveIDT() || isPipeType();
5641 }
5642 
5643 inline bool Type::isTemplateTypeParmType() const {
5644  return isa<TemplateTypeParmType>(CanonicalType);
5645 }
5646 
5647 inline bool Type::isSpecificBuiltinType(unsigned K) const {
5648  if (const BuiltinType *BT = getAs<BuiltinType>())
5649  if (BT->getKind() == (BuiltinType::Kind) K)
5650  return true;
5651  return false;
5652 }
5653 
5654 inline bool Type::isPlaceholderType() const {
5655  if (const BuiltinType *BT = dyn_cast<BuiltinType>(this))
5656  return BT->isPlaceholderType();
5657  return false;
5658 }
5659 
5661  if (const BuiltinType *BT = dyn_cast<BuiltinType>(this))
5662  if (BT->isPlaceholderType())
5663  return BT;
5664  return nullptr;
5665 }
5666 
5667 inline bool Type::isSpecificPlaceholderType(unsigned K) const {
5669  if (const BuiltinType *BT = dyn_cast<BuiltinType>(this))
5670  return (BT->getKind() == (BuiltinType::Kind) K);
5671  return false;
5672 }
5673 
5675  if (const BuiltinType *BT = dyn_cast<BuiltinType>(this))
5676  return BT->isNonOverloadPlaceholderType();
5677  return false;
5678 }
5679 
5680 inline bool Type::isVoidType() const {
5681  if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
5682  return BT->getKind() == BuiltinType::Void;
5683  return false;
5684 }
5685 
5686 inline bool Type::isHalfType() const {
5687  if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
5688  return BT->getKind() == BuiltinType::Half;
5689  // FIXME: Should we allow complex __fp16? Probably not.
5690  return false;
5691 }
5692 
5693 inline bool Type::isNullPtrType() const {
5694  if (const BuiltinType *BT = getAs<BuiltinType>())
5695  return BT->getKind() == BuiltinType::NullPtr;
5696  return false;
5697 }
5698 
5699 extern bool IsEnumDeclComplete(EnumDecl *);
5700 extern bool IsEnumDeclScoped(EnumDecl *);
5701 
5702 inline bool Type::isIntegerType() const {
5703  if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
5704  return BT->getKind() >= BuiltinType::Bool &&
5705  BT->getKind() <= BuiltinType::Int128;
5706  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
5707  // Incomplete enum types are not treated as integer types.
5708  // FIXME: In C++, enum types are never integer types.
5709  return IsEnumDeclComplete(ET->getDecl()) &&
5710  !IsEnumDeclScoped(ET->getDecl());
5711  }
5712  return false;
5713 }
5714 
5715 inline bool Type::isScalarType() const {
5716  if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
5717  return BT->getKind() > BuiltinType::Void &&
5718  BT->getKind() <= BuiltinType::NullPtr;
5719  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
5720  // Enums are scalar types, but only if they are defined. Incomplete enums
5721  // are not treated as scalar types.
5722  return IsEnumDeclComplete(ET->getDecl());
5723  return isa<PointerType>(CanonicalType) ||
5724  isa<BlockPointerType>(CanonicalType) ||
5725  isa<MemberPointerType>(CanonicalType) ||
5726  isa<ComplexType>(CanonicalType) ||
5727  isa<ObjCObjectPointerType>(CanonicalType);
5728 }
5729 
5731  if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
5732  return BT->getKind() >= BuiltinType::Bool &&
5733  BT->getKind() <= BuiltinType::Int128;
5734 
5735  // Check for a complete enum type; incomplete enum types are not properly an
5736  // enumeration type in the sense required here.
5737  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
5738  return IsEnumDeclComplete(ET->getDecl());
5739 
5740  return false;
5741 }
5742 
5743 inline bool Type::isBooleanType() const {
5744  if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
5745  return BT->getKind() == BuiltinType::Bool;
5746  return false;
5747 }
5748 
5749 inline bool Type::isUndeducedType() const {
5750  const AutoType *AT = getContainedAutoType();
5751  return AT && !AT->isDeduced();
5752 }
5753 
5754 /// \brief Determines whether this is a type for which one can define
5755 /// an overloaded operator.
5756 inline bool Type::isOverloadableType() const {
5757  return isDependentType() || isRecordType() || isEnumeralType();
5758 }
5759 
5760 /// \brief Determines whether this type can decay to a pointer type.
5761 inline bool Type::canDecayToPointerType() const {
5762  return isFunctionType() || isArrayType();
5763 }
5764 
5765 inline bool Type::hasPointerRepresentation() const {
5766  return (isPointerType() || isReferenceType() || isBlockPointerType() ||
5768 }
5769 
5771  return isObjCObjectPointerType();
5772 }
5773 
5774 inline const Type *Type::getBaseElementTypeUnsafe() const {
5775  const Type *type = this;
5776  while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe())
5777  type = arrayType->getElementType().getTypePtr();
5778  return type;
5779 }
5780 
5782  const Type *type = this;
5783  if (type->isAnyPointerType())
5784  return type->getPointeeType().getTypePtr();
5785  else if (type->isArrayType())
5786  return type->getBaseElementTypeUnsafe();
5787  return type;
5788 }
5789 
5790 /// Insertion operator for diagnostics. This allows sending QualType's into a
5791 /// diagnostic with <<.
5793  QualType T) {
5794  DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
5796  return DB;
5797 }
5798 
5799 /// Insertion operator for partial diagnostics. This allows sending QualType's
5800 /// into a diagnostic with <<.
5802  QualType T) {
5803  PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
5805  return PD;
5806 }
5807 
5808 // Helper class template that is used by Type::getAs to ensure that one does
5809 // not try to look through a qualified type to get to an array type.
5810 template <typename T, bool isArrayType = (std::is_same<T, ArrayType>::value ||
5811  std::is_base_of<ArrayType, T>::value)>
5813 
5814 template<typename T>
5816 
5817 // Member-template getAs<specific type>'.
5818 template <typename T> const T *Type::getAs() const {
5820  (void)at;
5821 
5822  // If this is directly a T type, return it.
5823  if (const T *Ty = dyn_cast<T>(this))
5824  return Ty;
5825 
5826  // If the canonical form of this type isn't the right kind, reject it.
5827  if (!isa<T>(CanonicalType))
5828  return nullptr;
5829 
5830  // If this is a typedef for the type, strip the typedef off without
5831  // losing all typedef information.
5832  return cast<T>(getUnqualifiedDesugaredType());
5833 }
5834 
5835 inline const ArrayType *Type::getAsArrayTypeUnsafe() const {
5836  // If this is directly an array type, return it.
5837  if (const ArrayType *arr = dyn_cast<ArrayType>(this))
5838  return arr;
5839 
5840  // If the canonical form of this type isn't the right kind, reject it.
5841  if (!isa<ArrayType>(CanonicalType))
5842  return nullptr;
5843 
5844  // If this is a typedef for the type, strip the typedef off without
5845  // losing all typedef information.
5846  return cast<ArrayType>(getUnqualifiedDesugaredType());
5847 }
5848 
5849 template <typename T> const T *Type::castAs() const {
5851  (void) at;
5852 
5853  if (const T *ty = dyn_cast<T>(this)) return ty;
5854  assert(isa<T>(CanonicalType));
5855  return cast<T>(getUnqualifiedDesugaredType());
5856 }
5857 
5859  assert(isa<ArrayType>(CanonicalType));
5860  if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr;
5861  return cast<ArrayType>(getUnqualifiedDesugaredType());
5862 }
5863 
5864 } // end namespace clang
5865 
5866 #endif
bool isDynamicExceptionSpec(ExceptionSpecificationType ESpecType)
bool isObjCSelType() const
Definition: Type.h:5588
bool isPlaceholderType() const
Determines whether this type is a placeholder type, i.e.
Definition: Type.h:2096
Internal representation of canonical, dependent typeof(expr) types.
Definition: Type.h:3549
Kind getKind() const
Definition: Type.h:2060
unsigned getNumElements() const
Definition: Type.h:2781
bool hasObjCGCAttr() const
Definition: Type.h:286
unsigned getAddressSpace() const
Return the address space of this type.
Definition: Type.h:5375
const ComplexType * getAsComplexIntegerType() const
Definition: Type.cpp:408
bool isUnspecialized() const
Determine whether this object type is "unspecialized", meaning that it has no type arguments...
Definition: Type.h:4817
bool compatiblyIncludesObjCLifetime(Qualifiers other) const
Determines if these qualifiers compatibly include another set of qualifiers from the narrow perspecti...
Definition: Type.h:466
bool qual_empty() const
Definition: Type.h:4840
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:1221
bool isObjCObjectOrInterfaceType() const
Definition: Type.h:5560
class LLVM_ALIGNAS(8) Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:78
QualType getExceptionType(unsigned i) const
Definition: Type.h:3332
Represents a type that was referred to using an elaborated type keyword, e.g., struct S...
Definition: Type.h:4430
SourceLocation getEnd() const
const ExtParameterInfo * getExtParameterInfosOrNull() const
Return a pointer to the beginning of the array of extra parameter information, if present...
Definition: Type.h:3425
typedefconst::clang::Type * SimpleType
Definition: Type.h:1116
Expr * getSizeExpr() const
Definition: Type.h:2731
QualType getUnderlyingType() const
Definition: Type.h:3599
Qualifiers getLocalQualifiers() const
Retrieve the set of qualifiers local to this particular QualType instance, not including any qualifie...
Definition: Type.h:5278
const Type * Ty
The locally-unqualified type.
Definition: Type.h:543
ObjCInterfaceDecl * getDecl() const
Get the declaration of this interface.
Definition: Type.h:4948
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1561
Qualifiers getNonFastQualifiers() const
Definition: Type.h:369
bool isVariadic() const
Definition: Type.h:3366
static bool classof(const Type *T)
Definition: Type.h:3700
static void print(SplitQualType split, raw_ostream &OS, const PrintingPolicy &policy, const Twine &PlaceHolder, unsigned Indentation=0)
Definition: Type.h:939
static Qualifiers fromCVRUMask(unsigned CVRU)
Definition: Type.h:218
bool isNullPtrType() const
Definition: Type.h:5693
ExtParameterInfo getExtParameterInfo(unsigned I) const
Definition: Type.h:3431
The "enum" keyword introduces the elaborated-type-specifier.
Definition: Type.h:4367
bool containsUnexpandedParameterPack() const
Whether this nested-name-specifier contains an unexpanded parameter pack (for C++11 variadic template...
void removeUnaligned()
Definition: Type.h:283
unsigned getDepth() const
Definition: Type.h:3945
void setDependent(bool D=true)
Definition: Type.h:1519
no exception specification
QualType desugar() const
Definition: Type.h:2736
bool canDecayToPointerType() const
Determines whether this type can decay to a pointer type.
Definition: Type.h:5761
bool isNonOverloadPlaceholderType() const
Test for a placeholder type other than Overload; see BuiltinType::isNonOverloadPlaceholderType.
Definition: Type.h:5674
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2179
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2641
Represents the dependent type named by a dependently-scoped typename using declaration, e.g.
Definition: Type.h:3473
bool isAtLeastAsQualifiedAs(QualType Other) const
Determine whether this type is at least as qualified as the other given type, requiring exact equalit...
Definition: Type.h:5413
A (possibly-)qualified type.
Definition: Type.h:598
bool isConstantArrayType() const
Definition: Type.h:5524
const Type * getPointeeOrArrayElementType() const
If this is a pointer type, return the pointee type.
Definition: Type.h:5781
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee)
Definition: Type.h:2217
SourceRange getBracketsRange() const
Definition: Type.h:2628
QualType getCallResultType(const ASTContext &Context) const
Determine the type of an expression that calls a function of this type.
Definition: Type.h:3025
bool isCharType() const
Definition: Type.cpp:1656
bool isCanonicalUnqualified() const
Determines if this type would be canonical if it had no further qualification.
Definition: Type.h:1559
bool isSpecificBuiltinType(unsigned K) const
Test for a particular builtin type.
Definition: Type.h:5647
bool operator==(Qualifiers Other) const
Definition: Type.h:483
bool hasFloatingRepresentation() const
Determine whether this type has a floating-point representation of some sort, e.g., it is a floating-point type or a vector thereof.
Definition: Type.cpp:1792
ExtInfo withCallingConv(CallingConv cc) const
Definition: Type.h:2986
bool isConsumed() const
Is this parameter considered "consumed" by Objective-C ARC? Consumed parameters must have retainable ...
Definition: Type.h:3115
ArrayRef< QualType > getTypeArgs() const
Retrieve the type arguments for this type.
Definition: Type.h:5098
DestructionKind isDestructedType() const
Returns a nonzero value if objects of this type require non-trivial work to clean up after...
Definition: Type.h:1032
static QualType getObjectType(APValue::LValueBase B)
Retrieves the "underlying object type" of the given expression, as used by __builtin_object_size.
bool isMemberPointerType() const
Definition: Type.h:5506
QualType desugar() const
Definition: Type.h:3052
FunctionDecl * getExceptionSpecDecl() const
If this function type has an exception specification which hasn't been determined yet (either because...
Definition: Type.h:3346
__auto_type (GNU extension)
QualType getBaseType() const
Definition: Type.h:3653
bool isKindOfTypeAsWritten() const
Whether this is a "__kindof" type as written.
Definition: Type.h:4858
bool isInstantiationDependentType() const
Determine whether this type is an instantiation-dependent type, meaning that the type involves a temp...
Definition: Type.h:1780
unsigned getFastQualifiers() const
Definition: Type.h:349
QualType getNonLValueExprType(const ASTContext &Context) const
Determine the type of a (typically non-lvalue) expression with the specified result type...
Definition: Type.cpp:2615
ParameterABI getParameterABI(unsigned I) const
Definition: Type.h:3438
Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const
Return the implicit lifetime for this type, which must not be dependent.
Definition: Type.cpp:3663
QualType desugar() const
Definition: Type.h:4334
bool isSugared() const
Definition: Type.h:5205
bool IsEnumDeclScoped(EnumDecl *ED)
Check if the given decl is scoped.
Definition: Decl.h:3864
AutoTypeKeyword
Which keyword(s) were used to create an AutoType.
Definition: Type.h:1246
void setInstantiationDependent(bool D=true)
Definition: Type.h:1524
NullabilityKind
Describes the nullability of a particular type.
Definition: Specifiers.h:278
QualType desugar() const
Definition: Type.h:2303
ExtInfo(CallingConv CC)
Definition: Type.h:2943
bool isAnyCharacterType() const
Determine whether this type is any of the built-in character types.
Definition: Type.cpp:1686
Internal representation of canonical, dependent __underlying_type(type) types.
Definition: Type.h:3668
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:2879
bool isLocalRestrictQualified() const
Determine whether this particular QualType instance has the "restrict" qualifier set, without looking through typedefs that may have added "restrict" at a different level.
Definition: Type.h:682
static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, QualType modified, QualType equivalent)
Definition: Type.h:3891
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4682
bool canHaveNullability() const
Determine whether the given type can have a nullability specifier applied to it, i.e., if it is any kind of pointer type or a dependent type that could instantiate to any kind of pointer type.
Definition: Type.cpp:3499
static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner)
Definition: Type.h:2170
No linkage, which means that the entity is unique and can only be referred to from within its scope...
Definition: Linkage.h:28
QualType desugar() const
Definition: Type.h:4528
bool isSugared() const
Definition: Type.h:2133
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2793
QualType desugar() const
Definition: Type.h:2374
void addConst()
Add the const type qualifier to this QualType.
Definition: Type.h:761
Qualifiers::GC getObjCGCAttr() const
Returns gc attribute of this type.
Definition: Type.h:5380
Represents a qualified type name for which the type name is dependent.
Definition: Type.h:4496
CanonicalTTPTInfo CanTTPTInfo
Definition: Type.h:3913
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:311
friend Qualifiers operator-(Qualifiers L, Qualifiers R)
Compute the difference between two qualifier sets.
Definition: Type.h:506
ConstantArrayType(TypeClass tc, QualType et, QualType can, const llvm::APInt &size, ArraySizeModifier sm, unsigned tq)
Definition: Type.h:2521
ArrayRef< ObjCProtocolDecl * > getProtocols() const
Retrieve all of the protocol qualifiers.
Definition: Type.h:4853
static bool classof(const Type *T)
Definition: Type.h:2312
static bool classof(const Type *T)
Definition: Type.h:4336
static std::string getAsString(SplitQualType split)
Definition: Type.h:927
bool isRecordType() const
Definition: Type.h:5539
static void Profile(llvm::FoldingSetNodeID &ID, QualType T)
Definition: Type.h:5181
bool isInteger() const
Definition: Type.h:2072
bool isChar16Type() const
Definition: Type.cpp:1672
ObjCObjectTypeBitfields ObjCObjectTypeBits
Definition: Type.h:1485
bool isLiteralType(const ASTContext &Ctx) const
Return true if this is a literal type (C++11 [basic.types]p10)
Definition: Type.cpp:2155
AutoType * getContainedAutoType() const
Get the AutoType whose type will be deduced for a variable with an initializer of this type...
Definition: Type.cpp:1595
StringRef P
bool isVoidPointerType() const
Definition: Type.cpp:385
Represents a C++11 auto or C++14 decltype(auto) type.
Definition: Type.h:4084
bool isObjCQualifiedId() const
Definition: Type.h:4799
QualType desugar() const
Definition: Type.h:4951
bool isEnumeralType() const
Definition: Type.h:5542
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:2990
A class providing a concrete implementation of ObjCObjectType, so as to not increase the footprint of...
Definition: Type.h:4894
void removeQualifiers(Qualifiers Q)
Remove the qualifiers from the given set from this set.
Definition: Type.h:397
static bool classof(const Type *T)
Definition: Type.h:2806
std::string getAsString() const
Definition: Type.h:924
const DiagnosticBuilder & operator<<(const DiagnosticBuilder &DB, const Attr *At)
Definition: Attr.h:198
bool hasExtParameterInfos() const
Is there any interesting extra information for any of the parameters of this function type...
Definition: Type.h:3416
QualType getPointeeType() const
Definition: Type.h:2420
The base class of the type hierarchy.
Definition: Type.h:1281
ObjCObjectType(enum Nonce_ObjCInterface)
Definition: Type.h:4765
bool isObjCQualifiedClassType() const
Definition: Type.h:5573
bool isElaboratedTypeSpecifier() const
Determine wither this type is a C++ elaborated-type-specifier.
Definition: Type.cpp:2494
unsigned getCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers applied to this type.
Definition: Type.h:5292
void setObjCGCAttr(GC type)
Definition: Type.h:288
DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, const IdentifierInfo *Name, ArrayRef< TemplateArgument > Args, QualType Canon)
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2456
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2136
const ObjCObjectType * getObjectType() const
Gets the type pointed to by this ObjC pointer.
Definition: Type.h:5031
AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, QualType CanonicalPtr)
Definition: Type.h:2232
static bool classof(const Type *T)
Definition: Type.h:2501
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2305
bool isDecltypeAuto() const
Definition: Type.h:4099
bool isBooleanType() const
Definition: Type.h:5743
static clang::QualType getFromVoidPointer(void *P)
Definition: Type.h:1129
bool compatiblyIncludes(Qualifiers other) const
Determines if these qualifiers compatibly include another set.
Definition: Type.h:445
QualType ElementType
The element type of the vector.
Definition: Type.h:2768
const QualType * param_type_iterator
Definition: Type.h:3386
unsigned getIndex() const
Definition: Type.h:3946
bool getHasRegParm() const
Definition: Type.h:3011
bool isBlockPointerType() const
Definition: Type.h:5488
const ObjCObjectPointerType * getAsObjCQualifiedClassType() const
Definition: Type.cpp:1488
StreamedQualTypeHelper stream(const PrintingPolicy &Policy, const Twine &PlaceHolder=Twine(), unsigned Indentation=0) const
Definition: Type.h:979
bool isCForbiddenLValueType() const
Determine whether expressions of the given type are forbidden from being lvalues in C...
Definition: Type.h:5439
bool isUnspecialized() const
Whether this type is unspecialized, meaning that is has no type arguments.
Definition: Type.h:5091
Qualifiers & operator+=(Qualifiers R)
Definition: Type.h:488
bool isSpelledAsLValue() const
Definition: Type.h:2336
static inline::clang::ExtQuals * getFromVoidPointer(void *P)
Definition: Type.h:65
static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, unsigned TypeQuals)
Definition: Type.h:2546
bool hasUnsignedIntegerRepresentation() const
Determine whether this type has an unsigned integer representation of some sort, e.g., it is an unsigned integer type or a vector.
Definition: Type.cpp:1776
bool hasStrongOrWeakObjCLifetime() const
True if the lifetime is either strong or weak.
Definition: Type.h:328
const llvm::APInt & getSize() const
Definition: Type.h:2527
void * getAsOpaquePtr() const
Definition: Type.h:646
static Qualifiers fromOpaqueValue(unsigned opaque)
Definition: Type.h:225
The noexcept specifier has a bad expression.
Definition: Type.h:3324
void removeObjCLifetime()
Definition: Type.h:314
ObjCLifetime getObjCLifetime() const
Definition: Type.h:308
The "union" keyword.
Definition: Type.h:4348
Extra information about a function prototype.
Definition: Type.h:3167
CallingConv getCallConv() const
Definition: Type.h:3017
bool isCanonical() const
Definition: Type.h:5303
std::string getAsString() const
AutoTypeKeyword getKeyword() const
Definition: Type.h:4102
Qualifiers::ObjCLifetime getObjCLifetime() const
Definition: Type.h:1211
ArrayTypeBitfields ArrayTypeBits
Definition: Type.h:1480
bool isSpecialized() const
Whether this type is specialized, meaning that it has type arguments.
Definition: Type.h:5083
The "__interface" keyword.
Definition: Type.h:4346
TemplateTypeParmDecl * getDecl() const
Definition: Type.h:3949
void addAddressSpace(unsigned space)
Definition: Type.h:341
QualType getOriginalType() const
Definition: Type.h:2243
bool isRealType() const
Definition: Type.cpp:1805
friend class ASTContext
Definition: Type.h:1517
bool isMemberDataPointerType() const
Definition: Type.h:5515
static Qualifiers fromFastMask(unsigned Mask)
Definition: Type.h:206
static StringRef getTagTypeKindName(TagTypeKind Kind)
Definition: Type.h:4414
QualType(const Type *Ptr, unsigned Quals)
Definition: Type.h:623
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
void getAsStringInternal(std::string &Str, const PrintingPolicy &Policy) const
Definition: Type.h:949
bool isImageType() const
Definition: Type.h:5627
const BuiltinType * getAsPlaceholderType() const
Definition: Type.h:5660
Qualifiers getIndexTypeQualifiers() const
Definition: Type.h:2494
bool containsUnexpandedParameterPack() const
Whether this type is or contains an unexpanded parameter pack, used to support C++0x variadic templat...
Definition: Type.h:1553
iterator begin() const
Definition: Type.h:4235
bool isObjCRetainableType() const
Definition: Type.cpp:3699
Represents the result of substituting a type for a template type parameter.
Definition: Type.h:3983
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2214
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:25
bool isUnionType() const
Definition: Type.cpp:391
const Type * getUnqualifiedDesugaredType() const
Return the specified type with any "sugar" removed from the type, removing any typedefs, typeofs, etc., as well as any qualifiers.
Definition: Type.cpp:341
QualType getUnderlyingType() const
Definition: Type.h:3652
bool isVoidType() const
Definition: Type.h:5680
The collection of all-type qualifiers we support.
Definition: Type.h:117
bool isSugared() const
Definition: Type.h:3955
bool isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType)
static int getAccessorIdx(char c)
Definition: Type.h:2858
QualType desugar() const
Definition: Type.h:3453
PipeType - OpenCL20.
Definition: Type.h:5190
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
Definition: Diagnostic.h:986
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2698
bool operator==(ExtInfo Other) const
Definition: Type.h:2956
QualType getPointeeType() const
Definition: Type.h:2275
unsigned getNumParams() const
Definition: Type.h:3271
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3253
Visibility getVisibility() const
Definition: Visibility.h:80
bool isOpenCLSpecificType() const
Definition: Type.h:5638
DependentTypeOfExprType(const ASTContext &Context, Expr *E)
Definition: Type.h:3554
const IdentifierInfo * getIdentifier() const
Retrieve the type named by the typename specifier as an identifier.
Definition: Type.h:4523
QualType getElementType() const
Definition: Type.h:2732
FunctionType::ExtInfo ExtInfo
Definition: Type.h:3182
One of these records is kept for each identifier that is lexed.
unsigned getIndexTypeCVRQualifiers() const
Definition: Type.h:2497
ExtInfo withProducesResult(bool producesResult) const
Definition: Type.h:2973
bool isScalarType() const
Definition: Type.h:5715
Defines the Linkage enumeration and various utility functions.
ParameterABI getABI() const
Return the ABI treatment of this parameter.
Definition: Type.h:3104
bool hasObjCPointerRepresentation() const
Whether this type can represent an objective pointer type for the purpose of GC'ability.
Definition: Type.h:5770
TagDecl * getAsTagDecl() const
Retrieves the TagDecl that this type refers to, either because the type is a TagType or because it is...
Definition: Type.cpp:1532
class LLVM_ALIGNAS(8) DependentTemplateSpecializationType const IdentifierInfo * Name
Represents a template specialization type whose template cannot be resolved, e.g. ...
Definition: Type.h:4549
Represents a class type in Objective C.
Definition: Type.h:4727
void removeRestrict()
Definition: Type.h:254
QualType desugar() const
Definition: Type.h:2070
Expr * getSizeExpr() const
Definition: Type.h:2623
ArrayRef< TemplateArgument > template_arguments() const
Definition: Type.h:4253
bool isVariablyModifiedType() const
Whether this type is a variably-modified type (C99 6.7.5).
Definition: Type.h:1789
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:92
is ARM Neon vector
Definition: Type.h:2763
ArrayRef< QualType > getParamTypes() const
Definition: Type.h:3276
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3669
bool isSugared() const
Definition: Type.h:3743
bool isReferenceType() const
Definition: Type.h:5491
QualType desugar() const
Definition: Type.h:3650
bool isStructureOrClassType() const
Definition: Type.cpp:378
bool isAnyPointerType() const
Definition: Type.h:5485
Defines the ExceptionSpecificationType enumeration and various utility functions. ...
void removeConst()
Definition: Type.h:240
bool isSugared() const
Returns whether this type directly provides sugar.
Definition: Type.h:4466
const TemplateArgument * getArgs() const
Retrieve the template arguments.
Definition: Type.h:4242
NoexceptResult
Result type of getNoexceptSpec().
Definition: Type.h:3322
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2440
static bool classof(const Type *T)
Definition: Type.h:2376
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
Definition: ASTMatchers.h:283
void setLocalFastQualifiers(unsigned Quals)
Definition: Type.h:629
bool isChar32Type() const
Definition: Type.cpp:1678
const CXXRecordDecl * getPointeeCXXRecordDecl() const
If this is a pointer or reference to a RecordType, return the CXXRecordDecl that that type refers to...
Definition: Type.cpp:1513
ObjCObjectType::qual_iterator qual_iterator
An iterator over the qualifiers on the object type.
Definition: Type.h:5110
Base class that is common to both the ExtQuals and Type classes, which allows QualType to access the ...
Definition: Type.h:1144
NestedNameSpecifier * getQualifier() const
Retrieve the qualification on this type.
Definition: Type.h:4516
unsigned getCVRQualifiers() const
Definition: Type.h:258
static bool classof(const Type *T)
Definition: Type.h:2113
Interesting information about a specific parameter that can't simply be reflected in parameter's type...
Definition: Type.h:3094
ArrayRef< ExtParameterInfo > getExtParameterInfos() const
Definition: Type.h:3417
static bool classof(const Type *T)
Definition: Type.h:4953
Represents the result of substituting a set of types for a template type parameter pack...
Definition: Type.h:4038
ArrayRef< QualType > getTypeArgsAsWritten() const
Retrieve the type arguments for this type.
Definition: Type.h:5103
ObjCProtocolDecl *const * qual_iterator
Definition: Type.h:4833
const RecordType * getAsUnionType() const
NOTE: getAs*ArrayType are methods on ASTContext.
Definition: Type.cpp:450
bool isLocalVolatileQualified() const
Determine whether this particular QualType instance has the "volatile" qualifier set, without looking through typedefs that may have added "volatile" at a different level.
Definition: Type.h:692
static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, unsigned NumElements, TypeClass TypeClass, VectorKind VecKind)
Definition: Type.h:2797
static int getPointAccessorIdx(char c)
Definition: Type.h:2821
unsigned getAsOpaqueValue() const
Definition: Type.h:232
ObjCProtocolDecl * getProtocol(unsigned I) const
Retrieve a qualifying protocol by index on the object type.
Definition: Type.h:5128
unsigned getRegParm() const
Definition: Type.h:2948
bool hasStrongOrWeakObjCLifetime() const
Definition: Type.h:1017
static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee, bool SpelledAsLValue)
Definition: Type.h:2351
bool isParamConsumed(unsigned I) const
Definition: Type.h:3445
qual_range quals() const
Definition: Type.h:4836
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:5209
QualType getUnderlyingType() const
Definition: Type.h:3578
ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, bool SpelledAsLValue)
Definition: Type.h:2323
Expr * getUnderlyingExpr() const
Definition: Type.h:3598
FunctionType(TypeClass tc, QualType res, QualType Canonical, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack, ExtInfo Info)
Definition: Type.h:2996
Values of this type can be null.
void addRestrict()
Add the restrict qualifier to this QualType.
Definition: Type.h:777
const Type & operator*() const
Definition: Type.h:653
static bool classof(const Type *T)
Definition: Type.h:5184
bool isSugared() const
Definition: Type.h:2868
unsigned getRegParmType() const
Definition: Type.h:3012
Type(TypeClass tc, QualType canon, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack)
Definition: Type.h:1502
bool isIntegralOrUnscopedEnumerationType() const
Determine whether this type is an integral or unscoped enumeration type.
Definition: Type.cpp:1639
bool hasNonFastQualifiers() const
Return true if the set contains any qualifiers which require an ExtQuals node to be allocated...
Definition: Type.h:368
bool isSugared() const
Definition: Type.h:2069
TemplateName getTemplateName() const
Retrieve the name of the template that we are specializing.
Definition: Type.h:4239
An rvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2383
static bool classof(const Type *T)
Definition: Type.h:2573
param_type_range param_types() const
Definition: Type.h:3389
static bool classof(const Type *T)
Definition: Type.h:2279
An lvalue ref-qualifier was provided (&).
Definition: Type.h:1240
bool isSpecificPlaceholderType(unsigned K) const
Test for a specific placeholder type.
Definition: Type.h:5667
void addObjCGCAttr(GC type)
Definition: Type.h:292
bool isFundamentalType() const
Tests whether the type is categorized as a fundamental type.
Definition: Type.h:5447
Microsoft throw(...) extension.
A convenient class for passing around template argument information.
Definition: TemplateBase.h:523
Qualifiers withoutObjCGCAttr() const
Definition: Type.h:296
void setRestrict(bool flag)
Definition: Type.h:251
static bool classof(const Type *T)
Definition: Type.h:5154
LinkageInfo getLinkageAndVisibility() const
Determine the linkage and visibility of this type.
Definition: Type.cpp:3471
QualType getBaseType() const
Gets the base type of this object type.
Definition: Type.h:4782
static void dump(llvm::raw_ostream &OS, StringRef FunctionName, ArrayRef< CounterExpression > Expressions, ArrayRef< CounterMappingRegion > Regions)
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
QualType getReturnType() const
Definition: Type.h:3009
The "struct" keyword introduces the elaborated-type-specifier.
Definition: Type.h:4359
const TemplateArgument & getArg(unsigned Idx) const
Retrieve a specific template argument as a type.
bool isSugared() const
Definition: Type.h:2211
UnresolvedUsingTypenameDecl * getDecl() const
Definition: Type.h:3483
TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, QualType Canonical, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack)
Definition: Type.h:4381
Whether values of this type can be null is (explicitly) unspecified.
Visibility
Describes the different kinds of visibility that a declaration may have.
Definition: Visibility.h:32
SplitQualType getSplitUnqualifiedType() const
Retrieve the unqualified variant of the given type, removing as little sugar as possible.
Definition: Type.h:5346
BuiltinType(Kind K)
Definition: Type.h:2052
bool isObjCLifetimeType() const
Returns true if objects of this type have lifetime semantics under ARC.
Definition: Type.cpp:3718
Represents a typeof (or typeof) expression (a GCC extension).
Definition: Type.h:3525
void addCVRQualifiers(unsigned mask)
Definition: Type.h:270
Expr * getNoexceptExpr() const
Definition: Type.h:3336
unsigned getNumProtocols() const
Return the number of qualifying protocols on the object type.
Definition: Type.h:5123
RecordDecl * getDecl() const
Definition: Type.h:3716
QualType withoutLocalFastQualifiers() const
Definition: Type.h:820
ObjCInterfaceDecl * getInterface() const
Gets the interface declaration for this object type, if the base type really is an interface...
Definition: Type.h:4970
bool isUnsignedIntegerType() const
Return true if this is an integer type that is unsigned, according to C99 6.2.5p6 [which returns true...
Definition: Type.cpp:1746
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4468
const ObjCObjectType * getAsObjCInterfaceType() const
Definition: Type.cpp:1498
Values of this type can never be null.
void print(raw_ostream &OS, const PrintingPolicy &Policy, const Twine &PlaceHolder=Twine(), unsigned Indentation=0) const
Definition: Type.h:934
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R)
Returns the common set of qualifiers while removing them from the given sets.
Definition: Type.h:170
static bool classof(const Type *T)
Definition: Type.h:2635
TemplateTypeParmDecl * TTPDecl
Definition: Type.h:3915
void addQualifiers(Qualifiers Q)
Add the qualifiers from the given set to this set.
Definition: Type.h:380
Type * this_()
Definition: Type.h:1501
static unsigned getNumAddressingBits(const ASTContext &Context, QualType ElementType, const llvm::APInt &NumElements)
Determine the number of bits required to address a member of.
Definition: Type.cpp:77
NestedNameSpecifier * getQualifier() const
Retrieve the qualification on this type.
Definition: Type.h:4457
static bool classof(const Type *T)
Definition: Type.h:3657
TypeClass getTypeClass() const
Definition: Type.h:1533
bool isStructureType() const
Definition: Type.cpp:363
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:1968
bool isObjCIndependentClassType() const
Definition: Type.cpp:3694
bool isIncompleteType(NamedDecl **Def=nullptr) const
Types are partitioned into 3 broad categories (C99 6.2.5p1): object types, function types...
Definition: Type.cpp:1892
bool hasConst() const
Definition: Type.h:236
QualType withVolatile() const
Definition: Type.h:772
void setUnaligned(bool flag)
Definition: Type.h:280
iterator end() const
static bool classof(const Type *T)
Definition: Type.h:2221
void print(raw_ostream &OS, const PrintingPolicy &Policy, bool appendSpaceIfNonEmpty=false) const
const TemplateSpecializationType * getInjectedTST() const
Definition: Type.h:4327
friend Qualifiers operator+(Qualifiers L, Qualifiers R)
Definition: Type.h:495
void addCVRUQualifiers(unsigned mask)
Definition: Type.h:274
void addUnaligned()
Definition: Type.h:284
Represents an ObjC class declaration.
Definition: DeclObjC.h:1091
bool isExtVectorType() const
Definition: Type.h:5551
static void * getAsVoidPointer(clang::QualType P)
Definition: Type.h:1126
QualType desugar() const
Definition: Type.h:2787
bool empty() const
Definition: Type.h:377
friend bool operator==(const QualType &LHS, const QualType &RHS)
Indicate whether the specified types and qualifiers are identical.
Definition: Type.h:918
detail::InMemoryDirectory::const_iterator I
is ARM Neon polynomial vector
Definition: Type.h:2764
FunctionDecl * SourceDecl
The function whose exception specification this is, for EST_Unevaluated and EST_Uninstantiated.
Definition: Type.h:3160
bool operator!=(ExtInfo Other) const
Definition: Type.h:2959
void removeVolatile()
Definition: Type.h:247
bool isFromAST() const
Whether this type comes from an AST file.
Definition: Type.h:1536
QualType getCanonicalTypeInternal() const
Definition: Type.h:2001
void setFastQualifiers(unsigned mask)
Definition: Type.h:350
bool isSugared() const
Definition: Type.h:2302
static void Profile(llvm::FoldingSetNodeID &ID, const TemplateTypeParmType *Replaced, QualType Replacement)
Definition: Type.h:4014
bool isMemberFunctionPointer() const
Returns true if the member type (i.e.
Definition: Type.h:2424
ObjCProtocolDecl * getProtocol(unsigned I) const
Fetch a protocol by index.
Definition: Type.h:4847
Represents an extended vector type where either the type or size is dependent.
Definition: Type.h:2718
This object can be modified without requiring retains or releases.
Definition: Type.h:138
const TemplateTypeParmType * getReplacedParameter() const
Gets the template parameter that was substituted for.
Definition: Type.h:4059
bool isLinkageValid() const
True if the computed linkage is valid.
Definition: Type.cpp:3463
Defines the clang::Visibility enumeration and various utility functions.
static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, const IdentifierInfo *Name)
Definition: Type.h:4534
static bool classof(const Type *T)
Definition: Type.h:4129
const ArrayType * getAsArrayTypeUnsafe() const
A variant of getAs<> for array types which silently discards qualifiers from the outermost type...
Definition: Type.h:5835
EnumDecl * getDecl() const
Definition: Type.h:3739
Represents a K&R-style 'int foo()' function, which has no information available about its arguments...
Definition: Type.h:3039
Provides definitions for the various language-specific address spaces.
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4530
llvm::iterator_range< qual_iterator > qual_range
Definition: Type.h:5111
QualType getValueType() const
Gets the type contained by this atomic type, i.e.
Definition: Type.h:5173
QualType getInjectedSpecializationType() const
Definition: Type.h:4326
bool isObjCUnqualifiedId() const
Definition: Type.h:4790
const Type * getBaseType() const
Definition: Type.h:1218
ExtInfo getExtInfo() const
Definition: Type.h:3018
const ArrayType * castAsArrayTypeUnsafe() const
A variant of castAs<> for array type which silently discards qualifiers from the outermost type...
Definition: Type.h:5858
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2167
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:873
CanQualType getCanonicalTypeUnqualified() const
ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
Definition: Type.h:1194
Optional< ArrayRef< QualType > > getObjCSubstitutions(const DeclContext *dc) const
Retrieve the set of substitutions required when accessing a member of the Objective-C receiver type t...
Definition: Type.cpp:1283
QualType getParamType(unsigned i) const
Definition: Type.h:3272
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3073
ExceptionSpecificationType getExceptionSpecType() const
Get the kind of exception specification on this function.
Definition: Type.h:3304
QualType getAliasedType() const
Get the aliased type, if this is a specialization of a type alias template.
Definition: Type.h:4228
bool isTypeAlias() const
Determine if this template specialization type is for a type alias template that has been substituted...
Definition: Type.h:4224
QualType desugar() const
Definition: Type.h:2212
bool isFloatingPoint() const
Definition: Type.h:2084
const Type * operator->() const
Definition: Type.h:657
qual_iterator qual_end() const
Definition: Type.h:4838
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1009
param_type_iterator param_type_begin() const
Definition: Type.h:3392
bool isUnspecializedAsWritten() const
Determine whether this object type is "unspecialized" as written, meaning that it has no type argumen...
Definition: Type.h:5095
QualType desugar() const
Definition: Type.h:2571
QualType desugar() const
Definition: Type.h:3744
ArraySizeModifier
Capture whether this is a normal array (e.g.
Definition: Type.h:2462
ASTContext * Context
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:315
QualType desugar() const
Definition: Type.h:2689
bool isMoreQualifiedThan(QualType Other) const
Determine whether this type is more qualified than the other given type, requiring exact equality for...
Definition: Type.h:5403
bool hasFastQualifiers() const
Definition: Type.h:348
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:415
bool isFunctionPointerType() const
Definition: Type.h:5500
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3054
bool hasLocalQualifiers() const
Determine whether this particular QualType instance has any qualifiers, without looking through any t...
Definition: Type.h:702
bool hasUnaligned() const
Definition: Type.h:279
bool hasSizedVLAType() const
Whether this type involves a variable-length array type with a definite size.
Definition: Type.cpp:3741
bool isRealFloatingType() const
Floating point categories.
Definition: Type.cpp:1799
bool isObjCInertUnsafeUnretainedType() const
Was this type written with the special inert-in-MRC __unsafe_unretained qualifier?
Definition: Type.cpp:519
bool hasVolatile() const
Definition: Type.h:243
static void * getAsVoidPointer(::clang::ExtQuals *P)
Definition: Type.h:64
bool isSignedInteger() const
Definition: Type.h:2076
bool isKindOfType() const
Whether this is a "__kindof" type.
Definition: Type.h:5080
Represents an array type in C++ whose size is a value-dependent expression.
Definition: Type.h:2659
bool isSignedIntegerOrEnumerationType() const
Determines whether this is an integer type that is signed or an enumeration types whose underlying ty...
Definition: Type.cpp:1722
int * Depth
static bool classof(const Type *T)
Definition: Type.h:2174
RecordType(TypeClass TC, RecordDecl *D)
Definition: Type.h:3711
SplitQualType split() const
Divides a QualType into its unqualified type and a set of local qualifiers.
Definition: Type.h:5267
static bool classof(const Type *T)
Definition: Type.h:4479
friend class ASTContext
Definition: Type.h:4178
const Type * getTypePtrOrNull() const
Definition: Type.h:5263
Qualifiers::GC getObjCGCAttr() const
Definition: Type.h:1208
QualType getSuperClassType() const
Retrieve the type of the superclass of this object type.
Definition: Type.h:4869
QualType getPointeeType() const
Definition: Type.h:2300
bool isUndeducedType() const
Determine whether this type is an undeduced type, meaning that it somehow involves a C++11 'auto' typ...
Definition: Type.h:5749
void addVolatile()
Definition: Type.h:248
Expr - This represents one expression.
Definition: Expr.h:105
bool isQueueT() const
Definition: Type.h:5615
static void getAsStringInternal(SplitQualType split, std::string &out, const PrintingPolicy &policy)
Definition: Type.h:953
static bool classof(const Type *T)
Definition: Type.h:3031
bool isSugared() const
Definition: Type.h:4679
The "typename" keyword precedes the qualified type name, e.g., typename T::type.
Definition: Type.h:4370
bool isSugared() const
Definition: Type.h:2528
QualType desugar() const
Remove a single level of sugar.
Definition: Type.h:4463
bool isAnyComplexType() const
Definition: Type.h:5545
static Kind getNullabilityAttrKind(NullabilityKind kind)
Retrieve the attribute kind corresponding to the given nullability kind.
Definition: Type.h:3862
bool isObjCClassType() const
Definition: Type.h:5583
Declaration of a template type parameter.
Internal representation of canonical, dependent decltype(expr) types.
Definition: Type.h:3616
bool hasObjCGCAttr() const
Definition: Type.h:1207
bool hasCVRQualifiers() const
Definition: Type.h:257
friend bool operator!=(const QualType &LHS, const QualType &RHS)
Definition: Type.h:921
QualType getLocallyUnqualifiedSingleStepDesugaredType() const
Pull a single level of sugar off of this locally-unqualified type.
Definition: Type.cpp:224
ElaboratedTypeKeyword
The elaboration keyword that precedes a qualified type name or introduces an elaborated-type-specifie...
Definition: Type.h:4357
bool isLocalConstQualified() const
Determine whether this particular QualType instance has the "const" qualifier set, without looking through typedefs that may have added "const" at a different level.
Definition: Type.h:672
bool isAtomicType() const
Definition: Type.h:5564
bool isUnsignedInteger() const
Definition: Type.h:2080
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3887
void setAddressSpace(unsigned space)
Definition: Type.h:335
ObjCSubstitutionContext
The kind of type we are substituting Objective-C type arguments into.
Definition: Type.h:571
bool isObjCGCWeak() const
true when Type is objc's weak.
Definition: Type.h:999
llvm::iterator_range< param_type_iterator > param_type_range
Definition: Type.h:3387
bool isSugared() const
Definition: Type.h:3649
Expr * getUnderlyingExpr() const
Definition: Type.h:3532
bool isVariableArrayType() const
Definition: Type.h:5530
bool hasObjCLifetime() const
Definition: Type.h:1210
QualType getNamedType() const
Retrieve the type named by the qualified-id.
Definition: Type.h:4460
bool getNoReturn() const
Definition: Type.h:2945
ExtProtoInfo getExtProtoInfo() const
Definition: Type.h:3280
bool isSugared() const
Definition: Type.h:5175
ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &O)
Definition: Type.h:3176
static bool classof(const Type *T)
Definition: Type.h:3488
#define bool
Definition: stdbool.h:31
void removeFastQualifiers(unsigned mask)
Definition: Type.h:354
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2249
bool isFloatingType() const
Definition: Type.cpp:1783
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3622
bool isSugared() const
Definition: Type.h:4257
ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm, unsigned tq, bool ContainsUnexpandedParameterPack)
Definition: Type.h:2475
struct ExtInfo * ExtInfo
Definition: CGCleanup.h:260
Represents a C++ template name within the type system.
Definition: TemplateName.h:176
Represents the type decltype(expr) (C++11).
Definition: Type.h:3590
void removeLocalConst()
Definition: Type.h:5353
void removeLocalVolatile()
Definition: Type.h:5361
bool isFunctionNoProtoType() const
Definition: Type.h:1661
unsigned getTypeQuals() const
Definition: Type.h:3006
QualType getDesugaredType(const ASTContext &Context) const
Return the specified type with any "sugar" removed from the type.
Definition: Type.h:892
There is no noexcept specifier.
Definition: Type.h:3323
bool isObjCIdType() const
Definition: Type.h:5578
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:541
Kind getAttrKind() const
Definition: Type.h:3827
static inline::clang::Type * getFromVoidPointer(void *P)
Definition: Type.h:56
SourceLocation getAttributeLoc() const
Definition: Type.h:2733
A unary type transform, which is a type constructed from another.
Definition: Type.h:3631
bool isDependentType() const
Whether this type is a dependent type, meaning that its definition somehow depends on a template para...
Definition: Type.h:1774
static bool classof(const Type *T)
Definition: Type.h:2358
bool hasTrailingReturn() const
Definition: Type.h:3376
Qualifiers Quals
The local qualifiers.
Definition: Type.h:546
bool isObjCQualifiedIdType() const
True if this is equivalent to 'id.
Definition: Type.h:5069
static bool classof(const Type *T)
Definition: Type.h:2554
ScalarTypeKind
Definition: Type.h:1758
SourceLocation getRBracketLoc() const
Definition: Type.h:2686
bool isSugared() const
Definition: Type.h:4527
A helper class for Type nodes having an ElaboratedTypeKeyword.
Definition: Type.h:4379
QualType withFastQualifiers(unsigned TQs) const
Definition: Type.h:807
QualType desugar() const
Definition: Type.h:2134
Represents a GCC generic vector type.
Definition: Type.h:2756
An lvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2366
ExtParameterInfo withABI(ParameterABI kind) const
Definition: Type.h:3107
bool isCurrentInstantiation() const
True if this template specialization type matches a current instantiation in the context in which it ...
Definition: Type.h:4205
class LLVM_ALIGNAS(8) TemplateSpecializationType unsigned NumArgs
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:4154
llvm::iterator_range< qual_iterator > qual_range
Definition: Type.h:4834
QualType getElementType() const
Definition: Type.h:2780
bool isStrictSupersetOf(Qualifiers Other) const
Determine whether this set of qualifiers is a strict superset of another set of qualifiers, not considering qualifier compatibility.
Definition: Type.cpp:32
bool isComplexIntegerType() const
Definition: Type.cpp:403
The result type of a method or function.
static bool classof(const Type *T)
Definition: Type.h:4694
void removeLocalCVRQualifiers(unsigned Mask)
Definition: Type.h:5365
unsigned getLocalCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers local to this particular QualType instan...
Definition: Type.h:727
bool IsEnumDeclComplete(EnumDecl *ED)
Check if the given decl is complete.
Definition: Decl.h:3856
bool isUnsignedIntegerOrEnumerationType() const
Determines whether this is an integer type that is unsigned or an enumeration types whose underlying ...
Definition: Type.cpp:1762
static ExtParameterInfo getFromOpaqueValue(unsigned char data)
Definition: Type.h:3129
void removeCVRQualifiers(unsigned mask)
Definition: Type.h:263
__UINTPTR_TYPE__ uintptr_t
An unsigned integer type with the property that any valid pointer to void can be converted to this ty...
Definition: opencl-c.h:75
QualType getReplacementType() const
Gets the type that was substituted for the template parameter.
Definition: Type.h:4004
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:231
bool isTemplateTypeParmType() const
Definition: Type.h:5643
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3673
QualType desugar() const
Definition: Type.h:2529
bool isObjectType() const
Determine whether this type is an object type.
Definition: Type.h:1588
QualType desugar() const
Definition: Type.h:3835
bool hasObjCLifetime() const
Definition: Type.h:307
bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const
SourceRange getBracketsRange() const
Definition: Type.h:2684
bool hasUnnamedOrLocalType() const
Whether this type is or contains a local or unnamed type.
Definition: Type.cpp:3381
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee)
Definition: Type.h:2308
unsigned getLocalFastQualifiers() const
Definition: Type.h:628
bool getNoReturnAttr() const
Determine whether this function type includes the GNU noreturn attribute.
Definition: Type.h:3016
static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, QualType NamedType)
Definition: Type.h:4472
const TemplateTypeParmType * getReplacedParameter() const
Gets the template parameter that was substituted for.
Definition: Type.h:3998
bool isDependentSizedArrayType() const
Definition: Type.h:5533
CXXRecordDecl * getMostRecentCXXRecordDecl() const
Definition: Type.cpp:3782
static void Profile(llvm::FoldingSetNodeID &ID, QualType T)
Definition: Type.h:5213
There is no lifetime qualification on this type.
Definition: Type.h:134
exception_iterator exception_begin() const
Definition: Type.h:3404
ExtInfo withRegParm(unsigned RegParm) const
Definition: Type.h:2980
bool hasNoexceptExceptionSpec() const
Return whether this function has a noexcept exception spec.
Definition: Type.h:3316
static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, ExtInfo Info)
Definition: Type.h:3057
is AltiVec 'vector Pixel'
Definition: Type.h:2761
#define false
Definition: stdbool.h:33
The "struct" keyword.
Definition: Type.h:4344
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:145
Kind
bool isIntegralOrEnumerationType() const
Determine whether this type is an integral or enumeration type.
Definition: Type.h:5730
not a target-specific vector type
Definition: Type.h:2759
ExceptionSpecificationType Type
The kind of exception specification this is.
Definition: Type.h:3153
static bool classof(const Type *T)
Definition: Type.h:3607
QualType desugar() const
Definition: Type.h:2633
static bool classof(const Type *T)
Definition: Type.h:3521
QualType desugar() const
Definition: Type.h:4680
void setVolatile(bool flag)
Definition: Type.h:244
const ExtParameterInfo * ExtParameterInfos
Definition: Type.h:3188
const char * getNameAsCString(const PrintingPolicy &Policy) const
Definition: Type.h:2062
Encodes a location in the source.
QualType desugar() const
Definition: Type.h:5207
bool hasIntegerRepresentation() const
Determine whether this type has an integer representation of some sort, e.g., it is an integer type o...
Definition: Type.cpp:1599
void addVolatile()
Add the volatile type qualifier to this QualType.
Definition: Type.h:769
bool isObjCIdOrClassType() const
True if this is equivalent to the 'id' or 'Class' type,.
Definition: Type.h:5063
Sugar for parentheses used when specifying types.
Definition: Type.h:2148
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of enums...
Definition: Type.h:3733
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:5259
Visibility getVisibility() const
Determine the visibility of this type.
Definition: Type.h:1948
const TemplateArgument * iterator
Definition: Type.h:4233
QualType getElementType() const
Definition: Type.h:2131
QualType withCVRQualifiers(unsigned CVR) const
Definition: Type.h:784
bool isConstant(const ASTContext &Ctx) const
Definition: Type.h:735
RefQualifierKind getRefQualifier() const
Retrieve the ref-qualifier associated with this function type.
Definition: Type.h:3382
SourceLocation getLBracketLoc() const
Definition: Type.h:2685
Represents typeof(type), a GCC extension.
Definition: Type.h:3566
Interfaces are the core concept in Objective-C for object oriented design.
Definition: Type.h:4936
static bool anyDependentTemplateArguments(ArrayRef< TemplateArgumentLoc > Args, bool &InstantiationDependent)
Determine whether any of the given template arguments are dependent.
static bool classof(const Type *T)
Definition: Type.h:2257
bool isComplexType() const
isComplexType() does not include complex integers (a GCC extension).
Definition: Type.cpp:397
bool isBuiltinType() const
Helper methods to distinguish type categories.
Definition: Type.h:5536
static bool classof(const Type *T)
Definition: Type.h:2449
const std::string ID
TagDecl - Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:2727
bool isConstantSizeType() const
Return true if this is not a variable sized type, according to the rules of C99 6.7.5p3.
Definition: Type.cpp:1882
static bool isPlaceholderTypeKind(Kind K)
Determines whether the given kind corresponds to a placeholder type.
Definition: Type.h:2089
static bool classof(const Type *T)
Definition: Type.h:2691
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2542
static QualType getUnderlyingType(const SubRegion *R)
bool isObjCUnqualifiedIdOrClass() const
Definition: Type.h:4792
static void Profile(llvm::FoldingSetNodeID &ID, QualType T)
Definition: Type.h:5151
VectorKind getVectorKind() const
Definition: Type.h:2789
unsigned getAddressSpace() const
Definition: Type.h:1216
QualType withConst() const
Definition: Type.h:764
bool qual_empty() const
Definition: Type.h:5120
bool isRestrict() const
Definition: Type.h:3021
bool isObjCBuiltinType() const
Definition: Type.h:5593
bool isObjCClassOrClassKindOfType() const
Whether the type is Objective-C 'Class' or a __kindof type of an Class type, e.g., __kindof Class <NSCopying>.
Definition: Type.cpp:496
bool isSugared() const
Definition: Type.h:3051
bool isSugared() const
Definition: Type.h:2389
bool isVisibilityExplicit() const
Return true if the visibility was explicitly set is the code.
Definition: Type.h:1953
The width of the "fast" qualifier mask.
Definition: Type.h:160
const TemplateArgument * getArgBuffer() const
Definition: Type.h:4563
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4011
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
static void Profile(llvm::FoldingSetNodeID &ID, const Type *BaseType, Qualifiers Quals)
Definition: Type.h:1224
No ref-qualifier was provided.
Definition: Type.h:1238
ExtInfo withNoReturn(bool noReturn) const
Definition: Type.h:2966
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
bool isIntegralType(const ASTContext &Ctx) const
Determine whether this type is an integral type.
Definition: Type.cpp:1625
const Type * getArrayElementTypeNoTypeQual() const
If this is an array type, return the element type of the array, potentially with type qualifiers miss...
Definition: Type.cpp:191
bool isObjCBoxableRecordType() const
Definition: Type.cpp:368
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx)
Definition: Type.h:4262
bool isSugared() const
Definition: Type.h:3518
Represents a canonical, potentially-qualified type.
Definition: CanonicalType.h:52
CanQual< Type > CanQualType
Represents a canonical, potentially-qualified type.
FunctionDecl * getExceptionSpecTemplate() const
If this function type has an uninstantiated exception specification, this is the function whose excep...
Definition: Type.h:3356
bool hasConstFields() const
Definition: Type.h:3723
AttributedTypeBitfields AttributedTypeBits
Definition: Type.h:1481
SplitQualType getSplitDesugaredType() const
Definition: Type.h:896
static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced, AutoTypeKeyword Keyword, bool IsDependent)
Definition: Type.h:4122
ExceptionSpecInfo(ExceptionSpecificationType EST)
Definition: Type.h:3148
const Type * getBaseElementTypeUnsafe() const
Get the base element type of this type, potentially discarding type qualifiers.
Definition: Type.h:5774
is AltiVec 'vector bool ...'
Definition: Type.h:2762
bool acceptsObjCTypeParams() const
Determines if this is an ObjC interface type that may accept type parameters.
Definition: Type.cpp:1365
bool isSpecializedAsWritten() const
Determine whether this object type was written with type arguments.
Definition: Type.h:4811
qual_iterator qual_begin() const
Definition: Type.h:5114
RefQualifierKind
The kind of C++11 ref-qualifier associated with a function type.
Definition: Type.h:1236
bool isReserveIDT() const
Definition: Type.h:5623
bool isMemberDataPointer() const
Returns true if the member type (i.e.
Definition: Type.h:2430
TypedefNameDecl * getDecl() const
Definition: Type.h:3516
QualType desugar() const
Definition: Type.h:5176
unsigned getNumProtocols() const
Return the number of qualifying protocols in this interface type, or 0 if there are none...
Definition: Type.h:4844
bool isObjCQualifiedClassType() const
True if this is equivalent to 'Class.
Definition: Type.h:5075
is AltiVec vector
Definition: Type.h:2760
SourceLocation getBegin() const
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:5849
static bool classof(const Type *T)
Definition: Type.h:3728
qual_iterator qual_begin() const
Definition: Type.h:4837
const IdentifierInfo * getIdentifier() const
Definition: Type.h:4580
Qualifiers & operator-=(Qualifiers R)
Definition: Type.h:500
static void PrintTemplateArgumentList(raw_ostream &OS, ArrayRef< TemplateArgument > Args, const PrintingPolicy &Policy, bool SkipBrackets=false)
Print a template argument list, including the '<' and '>' enclosing the template arguments...
bool isVectorType() const
Definition: Type.h:5548
friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs)
Definition: Type.h:3138
static bool isVectorSizeTooLarge(unsigned NumElements)
Definition: Type.h:2782
bool isPromotableIntegerType() const
More type predicates useful for type checking/promotion.
Definition: Type.cpp:2320
bool isMemberFunctionPointerType() const
Definition: Type.h:5509
An rvalue ref-qualifier was provided (&&).
Definition: Type.h:1242
Assigning into this object requires a lifetime extension.
Definition: Type.h:151
void removeObjCGCAttr()
Definition: Type.h:291
void addFastQualifiers(unsigned TQs)
Definition: Type.h:788
bool isVolatileQualified() const
Determine whether this type is volatile-qualified.
Definition: Type.h:5329
UTTKind getUTTKind() const
Definition: Type.h:3655
static QualType getFromOpaquePtr(const void *Ptr)
Definition: Type.h:647
void setVariablyModified(bool VM=true)
Definition: Type.h:1526
unsigned TypeAlias
Whether this template specialization type is a substituted type alias.
Definition: Type.h:4171
ParameterABI
Kinds of parameter ABI.
Definition: Specifiers.h:295
bool isAccessorWithinNumElements(char c) const
Definition: Type.h:2863
QualType desugar() const
Definition: Type.h:3956
bool isSugared() const
Definition: Type.h:3834
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:5148
bool isObjCQualifiedClass() const
Definition: Type.h:4800
Represents a pointer type decayed from an array or function type.
Definition: Type.h:2263
bool isFunctionProtoType() const
Definition: Type.h:1662
The injected class name of a C++ class template or class template partial specialization.
Definition: Type.h:4294
QualType getPointeeType() const
Definition: Type.h:2193
Represents a pack expansion of types.
Definition: Type.h:4641
ArrayRef< QualType > getTypeArgsAsWritten() const
Retrieve the type arguments of this object type as they were written.
Definition: Type.h:4828
Defines various enumerations that describe declaration and type specifiers.
Expr * getSizeExpr() const
Definition: Type.h:2679
const char * getTypeClassName() const
Definition: Type.cpp:2509
static unsigned getMaxSizeBits(const ASTContext &Context)
Determine the maximum number of active bits that an array's size can require, which limits the maximu...
Definition: Type.cpp:112
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2609
friend bool operator!=(SplitQualType a, SplitQualType b)
Definition: Type.h:561
Represents a template argument.
Definition: TemplateBase.h:40
static bool classof(const Type *T)
Definition: Type.h:3746
Represents a type which was implicitly adjusted by the semantic engine for arbitrary reasons...
Definition: Type.h:2227
TagTypeKind
The kind of a tag type.
Definition: Type.h:4342
QualType desugar() const
Definition: Type.h:3486
not evaluated yet, for special member function
A qualifier set is used to build a set of qualifiers.
Definition: Type.h:5225
Qualifiers withoutObjCLifetime() const
Definition: Type.h:301
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1135
bool isAggregateType() const
Determines whether the type is a C++ aggregate type or C aggregate or union type. ...
Definition: Type.cpp:1868
void setContainsUnexpandedParameterPack(bool PP=true)
Definition: Type.h:1528
static bool classof(const Type *T)
Definition: Type.h:3063
TypeWithKeywordBitfields TypeWithKeywordBits
Definition: Type.h:1487
bool isSugared() const
Definition: Type.h:2786
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Definition: ASTMatchers.h:1983
void removeLocalFastQualifiers()
Definition: Type.h:799
bool hasLocalNonFastQualifiers() const
Determine whether this particular QualType instance has any "non-fast" qualifiers, e.g., those that are stored in an ExtQualType instance.
Definition: Type.h:712
static bool classof(const Type *T)
Definition: Type.h:4073
static bool classof(const Type *T)
Definition: Type.h:3540
QualType IgnoreParens() const
Returns the specified type after dropping any outer-level parentheses.
Definition: Type.h:911
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:312
bool getProducesResult() const
Definition: Type.h:2946
bool hasNonTrivialObjCLifetime() const
True if the lifetime is neither None or ExplicitNone.
Definition: Type.h:322
TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can)
Definition: Type.h:3505
QualType getEquivalentType() const
Definition: Type.h:3832
StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, const Twine &PlaceHolder, unsigned Indentation)
Definition: Type.h:967
void dump() const
Definition: ASTDumper.cpp:2459
QualType desugar() const
Definition: Type.h:4107
bool isParameterPack() const
Definition: Type.h:3947
bool isStandardLayoutType() const
Test if this type is a standard-layout type.
Definition: Type.cpp:2221
Represents a dependent using declaration which was marked with typename.
Definition: DeclCXX.h:3268
void setConst(bool flag)
Definition: Type.h:237
The maximum supported address space number.
Definition: Type.h:157
The "union" keyword introduces the elaborated-type-specifier.
Definition: Type.h:4363
CallingConv getCC() const
Definition: Type.h:2954
const Type * strip(QualType type)
Collect any qualifiers on the given type and return an unqualified type.
Definition: Type.h:5232
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2742
param_type_iterator param_type_end() const
Definition: Type.h:3395
The "class" keyword introduces the elaborated-type-specifier.
Definition: Type.h:4365
friend raw_ostream & operator<<(raw_ostream &OS, const StreamedQualTypeHelper &SQT)
Definition: Type.h:972
ReferenceTypeBitfields ReferenceTypeBits
Definition: Type.h:1486
EnumDecl - Represents an enum.
Definition: Decl.h:3013
bool isSugared() const
Definition: Type.h:2164
FunctionType::ExtInfo getFunctionExtInfo(const Type &t)
Definition: Type.h:5384
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2348
QualType(const ExtQuals *Ptr, unsigned Quals)
Definition: Type.h:625
detail::InMemoryDirectory::const_iterator E
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2401
QualType getModifiedType() const
Definition: Type.h:3831
bool isHalfType() const
Definition: Type.h:5686
bool isSugared() const
Definition: Type.h:4333
void setCVRQualifiers(unsigned mask)
Definition: Type.h:259
bool isSamplerT() const
Definition: Type.h:5603
static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New)
Definition: Type.h:2252
bool isLValueReferenceType() const
Definition: Type.h:5494
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, Optional< unsigned > NumExpansions)
Definition: Type.h:4686
QualType desugar() const
Definition: Type.h:4009
unsigned char getOpaqueValue() const
Definition: Type.h:3128
bool isCanonicalAsParam() const
Definition: Type.h:5307
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3958
static bool classof(const Type *T)
Definition: Type.h:2738
void addConsistentQualifiers(Qualifiers qs)
Add the qualifiers from the given set to this set, given that they don't conflict.
Definition: Type.h:415
const RecordType * getAsStructureType() const
Definition: Type.cpp:431
bool isWideCharType() const
Definition: Type.cpp:1665
Defines the Diagnostic-related interfaces.
bool isRValueReferenceType() const
Definition: Type.h:5497
void addConst()
Definition: Type.h:241
bool isVisibilityExplicit() const
Definition: Visibility.h:81
void removeCVRQualifiers()
Definition: Type.h:267
QualType getPointeeType() const
Gets the type pointed to by this ObjC pointer.
Definition: Type.h:5006
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:5432
Represents a pointer to an Objective C object.
Definition: Type.h:4991
Pointer to a block type.
Definition: Type.h:2286
static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, UTTKind UKind)
Definition: Type.h:3677
static bool classof(const Type *T)
Definition: Type.h:3971
QualType desugar() const
Definition: Type.h:2165
bool isObjCObjectType() const
Definition: Type.h:5557
bool operator!=(Qualifiers Other) const
Definition: Type.h:484
FunctionTypeBitfields FunctionTypeBits
Definition: Type.h:1484
QualType getLocalUnqualifiedType() const
Return this type with all of the instance-specific qualifiers removed, but without removing any quali...
Definition: Type.h:831
FunctionDecl * SourceTemplate
The function template whose exception specification this is instantiated from, for EST_Uninstantiated...
Definition: Type.h:3163
const QualType * exception_iterator
Definition: Type.h:3399
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:3707
qual_iterator qual_end() const
Definition: Type.h:5117
Complex values, per C99 6.2.5p11.
Definition: Type.h:2119
static bool classof(const Type *T)
Definition: Type.h:3458
static bool classof(const Type *T)
Definition: Type.h:2143
bool isObjCNSObjectType() const
Definition: Type.cpp:3689
QualType withExactLocalFastQualifiers(unsigned TQs) const
Definition: Type.h:815
const T * getAs() const
Member-template getAs<specific type>'.
Definition: Type.h:5818
AutoTypeBitfields AutoTypeBits
Definition: Type.h:1482
unsigned getTypeQuals() const
Definition: Type.h:3378
bool isAddressSpaceOverlapping(const PointerType &other) const
Returns true if address spaces of pointers overlap.
Definition: Type.h:2203
QualType getCanonicalType() const
Definition: Type.h:5298
static bool classof(const Type *T)
Definition: Type.h:3898
bool isSpecifierType() const
Returns true if this type can be represented by some set of type specifiers.
Definition: Type.cpp:2352
ObjCInterfaceDecl * getInterfaceDecl() const
If this pointer points to an Objective @interface type, gets the declaration for that interface...
Definition: Type.h:5046
const ObjCObjectType * getAsObjCQualifiedInterfaceType() const
Definition: Type.cpp:1464
void addRestrict()
Definition: Type.h:255
bool isDeduced() const
Definition: Type.h:4114
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2579
static bool classof(const Type *T)
Definition: Type.h:2392
bool isObjCQualifiedIdType() const
Definition: Type.h:5568
VectorTypeBitfields VectorTypeBits
Definition: Type.h:1488
static bool classof(const Type *T)
Definition: Type.h:4541
bool isFunctionType() const
Definition: Type.h:5479
NestedNameSpecifier * getQualifier() const
Definition: Type.h:4579
ExtVectorType - Extended vector type.
Definition: Type.h:2816
QualType getInnerType() const
Definition: Type.h:2162
The noexcept specifier evaluates to false.
Definition: Type.h:3326
Base for LValueReferenceType and RValueReferenceType.
Definition: Type.h:2319
friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs)
Definition: Type.h:3135
bool isSugared() const
Definition: Type.h:4881
bool isSugared() const
Definition: Type.h:3725
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1528
QualType desugar() const
Remove a single level of sugar.
Definition: Type.h:3581
unsigned getAddressSpace() const
Definition: Type.h:334
ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, bool producesResult)
Definition: Type.h:2928
bool isNDRangeT() const
Definition: Type.h:5619
QualType withRestrict() const
Definition: Type.h:780
QualType desugar() const
Definition: Type.h:2438
bool isRestrictQualified() const
Determine whether this type is restrict-qualified.
Definition: Type.h:5323
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
static bool classof(const Type *T)
Definition: Type.h:5218
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
The "class" keyword.
Definition: Type.h:4350
GC getObjCGCAttr() const
Definition: Type.h:287
const Expr * Replacement
Definition: AttributeList.h:58
QualType getPointeeType() const
Definition: Type.h:2340
ArrayRef< QualType > Exceptions
Explicitly-specified list of exception types.
Definition: Type.h:3155
Linkage getLinkage() const
Determine the linkage of this type.
Definition: Type.cpp:3376
The type-property cache.
Definition: Type.cpp:3242
bool isSugared() const
Definition: Type.h:2632
bool hasNonTrivialObjCLifetime() const
Definition: Type.h:1013
bool isObjCGCStrong() const
true when Type is objc's strong.
Definition: Type.h:1004
const Type * getClass() const
Definition: Type.h:2434
bool isSugared() const
Definition: Type.h:3485
TypeBitfields TypeBits
Definition: Type.h:1479
Reading or writing from this object requires a barrier call.
Definition: Type.h:148
Expr * NoexceptExpr
Noexcept expression, if this is EST_ComputedNoexcept.
Definition: Type.h:3157
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, const Type *Class)
Definition: Type.h:2443
bool isSugared() const
Definition: Type.h:2437
An attributed type is a type to which a type attribute has been applied.
Definition: Type.h:3761
bool hasAddressSpace() const
Definition: Type.h:333
bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const
Definition: Type.cpp:3630
bool isObjCClassType() const
True if this is equivalent to the 'Class' type, i.e.
Definition: Type.h:5058
bool isCARCBridgableType() const
Determine whether the given type T is a "bridgeable" C type.
Definition: Type.cpp:3732
QualType desugar() const
Definition: Type.h:4882
QualType getUnqualifiedType() const
Retrieve the unqualified variant of the given type, removing as little sugar as possible.
Definition: Type.h:5339
bool isSugared() const
Definition: Type.h:2373
bool isClkEventT() const
Definition: Type.h:5611
bool isSugared() const
Definition: Type.h:4106
std::pair< const Type *, Qualifiers > asPair() const
Definition: Type.h:554
Represents a C++ struct/union/class.
Definition: DeclCXX.h:263
void removeLocalRestrict()
Definition: Type.h:5357
bool hasQualifiers() const
Return true if the set contains any qualifiers.
Definition: Type.h:376
bool isObjCObjectPointerType() const
Definition: Type.h:5554
bool isPlaceholderType() const
Test for a type which does not represent an actual type-system type but is instead used as a placehol...
Definition: Type.h:5654
static bool classof(const Type *T)
Definition: Type.h:4021
Represents a C array with an unspecified size.
Definition: Type.h:2562
bool isObjCUnqualifiedClass() const
Definition: Type.h:4791
SplitQualType(const Type *ty, Qualifiers qs)
Definition: Type.h:549
void removeFastQualifiers()
Definition: Type.h:358
bool isCompoundType() const
Tests whether the type is categorized as a compound type.
Definition: Type.h:5457
The parameter type of a method or function.
QualType desugar() const
Definition: Type.h:2247
ArraySizeModifier getSizeModifier() const
Definition: Type.h:2491
ElaboratedTypeKeyword getKeyword() const
Definition: Type.h:4391
bool hasDynamicExceptionSpec() const
Return whether this function has a dynamic (throw) exception spec.
Definition: Type.h:3312
bool isPipeType() const
Definition: Type.h:5634
bool isOverloadableType() const
Determines whether this is a type for which one can define an overloaded operator.
Definition: Type.h:5756
The "enum" keyword.
Definition: Type.h:4352
bool isEventT() const
Definition: Type.h:5607
qual_range quals() const
Definition: Type.h:5113
QualType desugar() const
Definition: Type.h:2390
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3557
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:43
This class is used for builtin types like 'int'.
Definition: Type.h:2039
exception_iterator exception_end() const
Definition: Type.h:3408
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:84
The fast qualifier mask.
Definition: Type.h:163
SourceLocation getLBracketLoc() const
Definition: Type.h:2629
QualType getAdjustedType() const
Definition: Type.h:2244
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3492
bool isArrayType() const
Definition: Type.h:5521
static bool classof(const Type *T)
Definition: Type.h:3586
void removeLocalFastQualifiers(unsigned Mask)
Definition: Type.h:800
QualType getPattern() const
Retrieve the pattern of this pack expansion, which is the type that will be repeatedly instantiated w...
Definition: Type.h:4668
bool isSpecializedAsWritten() const
Whether this type is specialized, meaning that it has type arguments.
Definition: Type.h:5086
QualType getDecayedType() const
Definition: Type.h:2273
static Qualifiers fromCVRMask(unsigned CVR)
Definition: Type.h:212
QualType getPointeeTypeAsWritten() const
Definition: Type.h:2339
bool getHasRegParm() const
Definition: Type.h:2947
TagDecl * getDecl() const
Definition: Type.cpp:2960
bool isObjCIndirectLifetimeType() const
Definition: Type.cpp:3704
bool isIncompleteArrayType() const
Definition: Type.h:5527
SourceLocation getRBracketLoc() const
Definition: Type.h:2630
Qualifiers getQualifiers() const
Definition: Type.h:1205
QualType desugar() const
Definition: Type.h:4260
bool isObjCId() const
Definition: Type.h:4784
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:988
bool hasRestrict() const
Definition: Type.h:250
QualType desugar() const
Definition: Type.h:5133
QualType getElementType() const
Definition: Type.h:5203
QualType getElementType() const
Definition: Type.h:2490
static void Profile(llvm::FoldingSetNodeID &ID, QualType Element)
Definition: Type.h:2139
bool hasQualifiers() const
Determine whether this type has any qualifiers.
Definition: Type.h:5334
ExtParameterInfo withIsConsumed(bool consumed) const
Definition: Type.h:3118
SplitQualType getSingleStepDesugaredType() const
Definition: Type.h:5252
bool isObjCClass() const
Definition: Type.h:4787
RecordType(const RecordDecl *D)
Definition: Type.h:3709
bool hasExceptionSpec() const
Return whether this function has any kind of exception spec.
Definition: Type.h:3308
static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, ArraySizeModifier SizeMod, unsigned TypeQuals)
Definition: Type.h:2584
static SimpleType getSimplifiedValue(::clang::QualType Val)
Definition: Type.h:1117
QualType desugar() const
Definition: Type.h:2869
We can encode up to four bits in the low bits of a type pointer, but there are many more type qualifi...
Definition: Type.h:1173
IdentifierInfo * getIdentifier() const
Definition: Type.h:4056
static StringRef getNameForCallConv(CallingConv CC)
Definition: Type.cpp:2631
#define true
Definition: stdbool.h:32
bool isObjCARCBridgableType() const
Determine whether the given type T is a "bridgable" Objective-C type, which is either an Objective-C ...
Definition: Type.cpp:3727
BuiltinTypeBitfields BuiltinTypeBits
Definition: Type.h:1483
static int getNumericAccessorIdx(char c)
Definition: Type.h:2830
bool isInterfaceType() const
Definition: Type.cpp:373
A trivial tuple used to represent a source range.
VectorType(QualType vecType, unsigned nElements, QualType canonType, VectorKind vecKind)
Definition: Type.cpp:172
static void * getAsVoidPointer(::clang::Type *P)
Definition: Type.h:55
bool isSugared() const
Definition: Type.h:2688
bool isVolatile() const
Definition: Type.h:3020
NamedDecl - This represents a decl with a name.
Definition: Decl.h:213
bool isNonOverloadPlaceholderType() const
Determines whether this type is a placeholder type other than Overload.
Definition: Type.h:2109
void addFastQualifiers(unsigned mask)
Definition: Type.h:361
StringRef getName(const PrintingPolicy &Policy) const
Definition: Type.cpp:2519
Represents a C array with a specified size that is not an integer-constant-expression.
Definition: Type.h:2607
bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, const ObjCObjectType *&bound) const
Whether the type is Objective-C 'id' or a __kindof type of an object type, e.g., __kindof NSView * or...
Definition: Type.cpp:470
bool isClassType() const
Definition: Type.cpp:358
bool isArithmeticType() const
Definition: Type.cpp:1814
No keyword precedes the qualified type name.
Definition: Type.h:4372
bool isSignedIntegerType() const
Return true if this is an integer type that is signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], or an enum decl which has a signed representation.
Definition: Type.cpp:1706
bool isSugared() const
Definition: Type.h:5132
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:5178
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:5318
bool hasSignedIntegerRepresentation() const
Determine whether this type has an signed integer representation of some sort, e.g., it is an signed integer type or a vector.
Definition: Type.cpp:1736
bool isUnspecializedAsWritten() const
Determine whether this object type is "unspecialized" as written, meaning that it has no type argumen...
Definition: Type.h:4821
bool isNull() const
Return true if this QualType doesn't point to a type yet.
Definition: Type.h:665
bool isSugared() const
Definition: Type.h:2246
bool isSugared() const
Definition: Type.h:4950
const ObjCObjectPointerType * getAsObjCInterfacePointerType() const
Definition: Type.cpp:1505
friend bool operator==(SplitQualType a, SplitQualType b)
Definition: Type.h:558
bool isObjCIdType() const
True if this is equivalent to the 'id' type, i.e.
Definition: Type.h:5052
The noexcept specifier is dependent.
Definition: Type.h:3325
bool isSugared() const
Returns whether this type directly provides sugar.
Definition: Type.h:3584
static void Profile(llvm::FoldingSetNodeID &ID, UnresolvedUsingTypenameDecl *D)
Definition: Type.h:3495
void removeAddressSpace()
Definition: Type.h:340
Optional< NullabilityKind > getNullability(const ASTContext &context) const
Determine the nullability of the given type.
Definition: Type.cpp:3480
QualType getSingleStepDesugaredType(const ASTContext &Context) const
Return the specified type with one level of "sugar" removed from the type.
Definition: Type.h:905
QualifierCollector(Qualifiers Qs=Qualifiers())
Definition: Type.h:5227
TemplateSpecializationType(TemplateName T, ArrayRef< TemplateArgument > Args, QualType Canon, QualType Aliased)
The "__interface" keyword introduces the elaborated-type-specifier.
Definition: Type.h:4361
Optional< unsigned > getNumExpansions() const
Retrieve the number of expansions that this pack expansion will generate, if known.
Definition: Type.h:4672
ArrayRef< QualType > exceptions() const
Definition: Type.h:3401
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2512
ExceptionSpecInfo ExceptionSpec
Definition: Type.h:3187
static bool classof(const Type *T)
Definition: Type.h:4884
A class which abstracts out some details necessary for making a call.
Definition: Type.h:2904
bool isObjCQualifiedInterfaceType() const
Definition: Type.cpp:1474
static bool classof(const Type *T)
Definition: Type.h:2871
unsigned getNumArgs() const
Retrieve the number of template arguments.
Definition: Type.h:4247
ScalarTypeKind getScalarTypeKind() const
Given that this is a scalar type, classify it.
Definition: Type.cpp:1829
bool isSugared() const
Definition: Type.h:3452
bool hasPointerRepresentation() const
Whether this type is represented natively as a pointer.
Definition: Type.h:5765
static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, unsigned Index, bool ParameterPack, TemplateTypeParmDecl *TTPDecl)
Definition: Type.h:3962
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4118
bool isIntegerType() const
isIntegerType() does not include complex integers (a GCC extension).
Definition: Type.h:5702
QualType desugar() const
Definition: Type.h:3726
const ObjCObjectPointerType * getAsObjCQualifiedIdType() const
Definition: Type.cpp:1478
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:518
bool hasAddressSpace() const
Definition: Type.h:1215
bool isAddressSpaceSupersetOf(Qualifiers other) const
Returns true if this address space is a superset of the other one.
Definition: Type.h:432
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:5286
bool isInnerRef() const
Definition: Type.h:2337
bool isPointerType() const
Definition: Type.h:5482
bool isConst() const
Definition: Type.h:3019
unsigned getNumExceptions() const
Definition: Type.h:3331
bool isIncompleteOrObjectType() const
Return true if this is an incomplete or object type, in other words, not a function type...
Definition: Type.h:1583
QualType getDeducedType() const
Get the type deduced for this auto type, or null if it's either not been deduced or was deduced to a ...
Definition: Type.h:4111
bool isSugared() const
Definition: Type.h:2570