clang  10.0.0git
Type.h
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1 //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 /// \file
10 /// 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/AttrKinds.h"
24 #include "clang/Basic/Diagnostic.h"
26 #include "clang/Basic/LLVM.h"
27 #include "clang/Basic/Linkage.h"
30 #include "clang/Basic/Specifiers.h"
31 #include "clang/Basic/Visibility.h"
32 #include "llvm/ADT/APInt.h"
33 #include "llvm/ADT/APSInt.h"
34 #include "llvm/ADT/ArrayRef.h"
35 #include "llvm/ADT/FoldingSet.h"
36 #include "llvm/ADT/None.h"
37 #include "llvm/ADT/Optional.h"
38 #include "llvm/ADT/PointerIntPair.h"
39 #include "llvm/ADT/PointerUnion.h"
40 #include "llvm/ADT/StringRef.h"
41 #include "llvm/ADT/Twine.h"
42 #include "llvm/ADT/iterator_range.h"
43 #include "llvm/Support/Casting.h"
44 #include "llvm/Support/Compiler.h"
45 #include "llvm/Support/ErrorHandling.h"
46 #include "llvm/Support/PointerLikeTypeTraits.h"
47 #include "llvm/Support/type_traits.h"
48 #include "llvm/Support/TrailingObjects.h"
49 #include <cassert>
50 #include <cstddef>
51 #include <cstdint>
52 #include <cstring>
53 #include <string>
54 #include <type_traits>
55 #include <utility>
56 
57 namespace clang {
58 
59 class ExtQuals;
60 class QualType;
61 class ConceptDecl;
62 class TagDecl;
63 class Type;
64 
65 enum {
68 };
69 
70 namespace serialization {
71  template <class T> class AbstractTypeReader;
72  template <class T> class AbstractTypeWriter;
73 }
74 
75 } // namespace clang
76 
77 namespace llvm {
78 
79  template <typename T>
80  struct PointerLikeTypeTraits;
81  template<>
83  static inline void *getAsVoidPointer(::clang::Type *P) { return P; }
84 
86  return static_cast< ::clang::Type*>(P);
87  }
88 
89  enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
90  };
91 
92  template<>
94  static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }
95 
96  static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
97  return static_cast< ::clang::ExtQuals*>(P);
98  }
99 
100  enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
101  };
102 
103 } // namespace llvm
104 
105 namespace clang {
106 
107 class ASTContext;
108 template <typename> class CanQual;
109 class CXXRecordDecl;
110 class DeclContext;
111 class EnumDecl;
112 class Expr;
113 class ExtQualsTypeCommonBase;
114 class FunctionDecl;
115 class IdentifierInfo;
116 class NamedDecl;
117 class ObjCInterfaceDecl;
118 class ObjCProtocolDecl;
119 class ObjCTypeParamDecl;
120 struct PrintingPolicy;
121 class RecordDecl;
122 class Stmt;
123 class TagDecl;
124 class TemplateArgument;
125 class TemplateArgumentListInfo;
126 class TemplateArgumentLoc;
127 class TemplateTypeParmDecl;
128 class TypedefNameDecl;
129 class UnresolvedUsingTypenameDecl;
130 
131 using CanQualType = CanQual<Type>;
132 
133 // Provide forward declarations for all of the *Type classes.
134 #define TYPE(Class, Base) class Class##Type;
135 #include "clang/AST/TypeNodes.inc"
136 
137 /// The collection of all-type qualifiers we support.
138 /// Clang supports five independent qualifiers:
139 /// * C99: const, volatile, and restrict
140 /// * MS: __unaligned
141 /// * Embedded C (TR18037): address spaces
142 /// * Objective C: the GC attributes (none, weak, or strong)
143 class Qualifiers {
144 public:
145  enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
146  Const = 0x1,
147  Restrict = 0x2,
148  Volatile = 0x4,
149  CVRMask = Const | Volatile | Restrict
150  };
151 
152  enum GC {
153  GCNone = 0,
155  Strong
156  };
157 
159  /// There is no lifetime qualification on this type.
161 
162  /// This object can be modified without requiring retains or
163  /// releases.
165 
166  /// Assigning into this object requires the old value to be
167  /// released and the new value to be retained. The timing of the
168  /// release of the old value is inexact: it may be moved to
169  /// immediately after the last known point where the value is
170  /// live.
172 
173  /// Reading or writing from this object requires a barrier call.
175 
176  /// Assigning into this object requires a lifetime extension.
177  OCL_Autoreleasing
178  };
179 
180  enum {
181  /// The maximum supported address space number.
182  /// 23 bits should be enough for anyone.
183  MaxAddressSpace = 0x7fffffu,
184 
185  /// The width of the "fast" qualifier mask.
186  FastWidth = 3,
187 
188  /// The fast qualifier mask.
189  FastMask = (1 << FastWidth) - 1
190  };
191 
192  /// Returns the common set of qualifiers while removing them from
193  /// the given sets.
195  // If both are only CVR-qualified, bit operations are sufficient.
196  if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
197  Qualifiers Q;
198  Q.Mask = L.Mask & R.Mask;
199  L.Mask &= ~Q.Mask;
200  R.Mask &= ~Q.Mask;
201  return Q;
202  }
203 
204  Qualifiers Q;
205  unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
206  Q.addCVRQualifiers(CommonCRV);
207  L.removeCVRQualifiers(CommonCRV);
208  R.removeCVRQualifiers(CommonCRV);
209 
210  if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
212  L.removeObjCGCAttr();
213  R.removeObjCGCAttr();
214  }
215 
216  if (L.getObjCLifetime() == R.getObjCLifetime()) {
218  L.removeObjCLifetime();
219  R.removeObjCLifetime();
220  }
221 
222  if (L.getAddressSpace() == R.getAddressSpace()) {
224  L.removeAddressSpace();
225  R.removeAddressSpace();
226  }
227  return Q;
228  }
229 
230  static Qualifiers fromFastMask(unsigned Mask) {
231  Qualifiers Qs;
232  Qs.addFastQualifiers(Mask);
233  return Qs;
234  }
235 
236  static Qualifiers fromCVRMask(unsigned CVR) {
237  Qualifiers Qs;
238  Qs.addCVRQualifiers(CVR);
239  return Qs;
240  }
241 
242  static Qualifiers fromCVRUMask(unsigned CVRU) {
243  Qualifiers Qs;
244  Qs.addCVRUQualifiers(CVRU);
245  return Qs;
246  }
247 
248  // Deserialize qualifiers from an opaque representation.
249  static Qualifiers fromOpaqueValue(unsigned opaque) {
250  Qualifiers Qs;
251  Qs.Mask = opaque;
252  return Qs;
253  }
254 
255  // Serialize these qualifiers into an opaque representation.
256  unsigned getAsOpaqueValue() const {
257  return Mask;
258  }
259 
260  bool hasConst() const { return Mask & Const; }
261  bool hasOnlyConst() const { return Mask == Const; }
262  void removeConst() { Mask &= ~Const; }
263  void addConst() { Mask |= Const; }
264 
265  bool hasVolatile() const { return Mask & Volatile; }
266  bool hasOnlyVolatile() const { return Mask == Volatile; }
267  void removeVolatile() { Mask &= ~Volatile; }
268  void addVolatile() { Mask |= Volatile; }
269 
270  bool hasRestrict() const { return Mask & Restrict; }
271  bool hasOnlyRestrict() const { return Mask == Restrict; }
272  void removeRestrict() { Mask &= ~Restrict; }
273  void addRestrict() { Mask |= Restrict; }
274 
275  bool hasCVRQualifiers() const { return getCVRQualifiers(); }
276  unsigned getCVRQualifiers() const { return Mask & CVRMask; }
277  unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); }
278 
279  void setCVRQualifiers(unsigned mask) {
280  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits");
281  Mask = (Mask & ~CVRMask) | mask;
282  }
283  void removeCVRQualifiers(unsigned mask) {
284  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits");
285  Mask &= ~mask;
286  }
288  removeCVRQualifiers(CVRMask);
289  }
290  void addCVRQualifiers(unsigned mask) {
291  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits");
292  Mask |= mask;
293  }
294  void addCVRUQualifiers(unsigned mask) {
295  assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits");
296  Mask |= mask;
297  }
298 
299  bool hasUnaligned() const { return Mask & UMask; }
300  void setUnaligned(bool flag) {
301  Mask = (Mask & ~UMask) | (flag ? UMask : 0);
302  }
303  void removeUnaligned() { Mask &= ~UMask; }
304  void addUnaligned() { Mask |= UMask; }
305 
306  bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
307  GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
309  Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
310  }
311  void removeObjCGCAttr() { setObjCGCAttr(GCNone); }
313  assert(type);
314  setObjCGCAttr(type);
315  }
317  Qualifiers qs = *this;
318  qs.removeObjCGCAttr();
319  return qs;
320  }
322  Qualifiers qs = *this;
323  qs.removeObjCLifetime();
324  return qs;
325  }
327  Qualifiers qs = *this;
328  qs.removeAddressSpace();
329  return qs;
330  }
331 
332  bool hasObjCLifetime() const { return Mask & LifetimeMask; }
334  return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
335  }
337  Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
338  }
339  void removeObjCLifetime() { setObjCLifetime(OCL_None); }
341  assert(type);
342  assert(!hasObjCLifetime());
343  Mask |= (type << LifetimeShift);
344  }
345 
346  /// True if the lifetime is neither None or ExplicitNone.
348  ObjCLifetime lifetime = getObjCLifetime();
349  return (lifetime > OCL_ExplicitNone);
350  }
351 
352  /// True if the lifetime is either strong or weak.
354  ObjCLifetime lifetime = getObjCLifetime();
355  return (lifetime == OCL_Strong || lifetime == OCL_Weak);
356  }
357 
358  bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
360  return static_cast<LangAS>(Mask >> AddressSpaceShift);
361  }
363  return isTargetAddressSpace(getAddressSpace());
364  }
365  /// Get the address space attribute value to be printed by diagnostics.
367  auto Addr = getAddressSpace();
368  // This function is not supposed to be used with language specific
369  // address spaces. If that happens, the diagnostic message should consider
370  // printing the QualType instead of the address space value.
371  assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace());
372  if (Addr != LangAS::Default)
373  return toTargetAddressSpace(Addr);
374  // TODO: The diagnostic messages where Addr may be 0 should be fixed
375  // since it cannot differentiate the situation where 0 denotes the default
376  // address space or user specified __attribute__((address_space(0))).
377  return 0;
378  }
379  void setAddressSpace(LangAS space) {
380  assert((unsigned)space <= MaxAddressSpace);
381  Mask = (Mask & ~AddressSpaceMask)
382  | (((uint32_t) space) << AddressSpaceShift);
383  }
384  void removeAddressSpace() { setAddressSpace(LangAS::Default); }
385  void addAddressSpace(LangAS space) {
386  assert(space != LangAS::Default);
387  setAddressSpace(space);
388  }
389 
390  // Fast qualifiers are those that can be allocated directly
391  // on a QualType object.
392  bool hasFastQualifiers() const { return getFastQualifiers(); }
393  unsigned getFastQualifiers() const { return Mask & FastMask; }
394  void setFastQualifiers(unsigned mask) {
395  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits");
396  Mask = (Mask & ~FastMask) | mask;
397  }
398  void removeFastQualifiers(unsigned mask) {
399  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits");
400  Mask &= ~mask;
401  }
403  removeFastQualifiers(FastMask);
404  }
405  void addFastQualifiers(unsigned mask) {
406  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits");
407  Mask |= mask;
408  }
409 
410  /// Return true if the set contains any qualifiers which require an ExtQuals
411  /// node to be allocated.
412  bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
414  Qualifiers Quals = *this;
415  Quals.setFastQualifiers(0);
416  return Quals;
417  }
418 
419  /// Return true if the set contains any qualifiers.
420  bool hasQualifiers() const { return Mask; }
421  bool empty() const { return !Mask; }
422 
423  /// Add the qualifiers from the given set to this set.
425  // If the other set doesn't have any non-boolean qualifiers, just
426  // bit-or it in.
427  if (!(Q.Mask & ~CVRMask))
428  Mask |= Q.Mask;
429  else {
430  Mask |= (Q.Mask & CVRMask);
431  if (Q.hasAddressSpace())
432  addAddressSpace(Q.getAddressSpace());
433  if (Q.hasObjCGCAttr())
434  addObjCGCAttr(Q.getObjCGCAttr());
435  if (Q.hasObjCLifetime())
436  addObjCLifetime(Q.getObjCLifetime());
437  }
438  }
439 
440  /// Remove the qualifiers from the given set from this set.
442  // If the other set doesn't have any non-boolean qualifiers, just
443  // bit-and the inverse in.
444  if (!(Q.Mask & ~CVRMask))
445  Mask &= ~Q.Mask;
446  else {
447  Mask &= ~(Q.Mask & CVRMask);
448  if (getObjCGCAttr() == Q.getObjCGCAttr())
449  removeObjCGCAttr();
450  if (getObjCLifetime() == Q.getObjCLifetime())
451  removeObjCLifetime();
452  if (getAddressSpace() == Q.getAddressSpace())
453  removeAddressSpace();
454  }
455  }
456 
457  /// Add the qualifiers from the given set to this set, given that
458  /// they don't conflict.
460  assert(getAddressSpace() == qs.getAddressSpace() ||
461  !hasAddressSpace() || !qs.hasAddressSpace());
462  assert(getObjCGCAttr() == qs.getObjCGCAttr() ||
463  !hasObjCGCAttr() || !qs.hasObjCGCAttr());
464  assert(getObjCLifetime() == qs.getObjCLifetime() ||
465  !hasObjCLifetime() || !qs.hasObjCLifetime());
466  Mask |= qs.Mask;
467  }
468 
469  /// Returns true if address space A is equal to or a superset of B.
470  /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
471  /// overlapping address spaces.
472  /// CL1.1 or CL1.2:
473  /// every address space is a superset of itself.
474  /// CL2.0 adds:
475  /// __generic is a superset of any address space except for __constant.
477  // Address spaces must match exactly.
478  return A == B ||
479  // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
480  // for __constant can be used as __generic.
482  // Consider pointer size address spaces to be equivalent to default.
483  ((isPtrSizeAddressSpace(A) || A == LangAS::Default) &&
485  }
486 
487  /// Returns true if the address space in these qualifiers is equal to or
488  /// a superset of the address space in the argument qualifiers.
490  return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace());
491  }
492 
493  /// Determines if these qualifiers compatibly include another set.
494  /// Generally this answers the question of whether an object with the other
495  /// qualifiers can be safely used as an object with these qualifiers.
496  bool compatiblyIncludes(Qualifiers other) const {
497  return isAddressSpaceSupersetOf(other) &&
498  // ObjC GC qualifiers can match, be added, or be removed, but can't
499  // be changed.
500  (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
501  !other.hasObjCGCAttr()) &&
502  // ObjC lifetime qualifiers must match exactly.
503  getObjCLifetime() == other.getObjCLifetime() &&
504  // CVR qualifiers may subset.
505  (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
506  // U qualifier may superset.
507  (!other.hasUnaligned() || hasUnaligned());
508  }
509 
510  /// Determines if these qualifiers compatibly include another set of
511  /// qualifiers from the narrow perspective of Objective-C ARC lifetime.
512  ///
513  /// One set of Objective-C lifetime qualifiers compatibly includes the other
514  /// if the lifetime qualifiers match, or if both are non-__weak and the
515  /// including set also contains the 'const' qualifier, or both are non-__weak
516  /// and one is None (which can only happen in non-ARC modes).
518  if (getObjCLifetime() == other.getObjCLifetime())
519  return true;
520 
521  if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
522  return false;
523 
524  if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
525  return true;
526 
527  return hasConst();
528  }
529 
530  /// Determine whether this set of qualifiers is a strict superset of
531  /// another set of qualifiers, not considering qualifier compatibility.
532  bool isStrictSupersetOf(Qualifiers Other) const;
533 
534  bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
535  bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }
536 
537  explicit operator bool() const { return hasQualifiers(); }
538 
540  addQualifiers(R);
541  return *this;
542  }
543 
544  // Union two qualifier sets. If an enumerated qualifier appears
545  // in both sets, use the one from the right.
547  L += R;
548  return L;
549  }
550 
552  removeQualifiers(R);
553  return *this;
554  }
555 
556  /// Compute the difference between two qualifier sets.
558  L -= R;
559  return L;
560  }
561 
562  std::string getAsString() const;
563  std::string getAsString(const PrintingPolicy &Policy) const;
564 
565  static std::string getAddrSpaceAsString(LangAS AS);
566 
567  bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
568  void print(raw_ostream &OS, const PrintingPolicy &Policy,
569  bool appendSpaceIfNonEmpty = false) const;
570 
571  void Profile(llvm::FoldingSetNodeID &ID) const {
572  ID.AddInteger(Mask);
573  }
574 
575 private:
576  // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31|
577  // |C R V|U|GCAttr|Lifetime|AddressSpace|
578  uint32_t Mask = 0;
579 
580  static const uint32_t UMask = 0x8;
581  static const uint32_t UShift = 3;
582  static const uint32_t GCAttrMask = 0x30;
583  static const uint32_t GCAttrShift = 4;
584  static const uint32_t LifetimeMask = 0x1C0;
585  static const uint32_t LifetimeShift = 6;
586  static const uint32_t AddressSpaceMask =
587  ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
588  static const uint32_t AddressSpaceShift = 9;
589 };
590 
591 /// A std::pair-like structure for storing a qualified type split
592 /// into its local qualifiers and its locally-unqualified type.
594  /// The locally-unqualified type.
595  const Type *Ty = nullptr;
596 
597  /// The local qualifiers.
599 
600  SplitQualType() = default;
601  SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}
602 
603  SplitQualType getSingleStepDesugaredType() const; // end of this file
604 
605  // Make std::tie work.
606  std::pair<const Type *,Qualifiers> asPair() const {
607  return std::pair<const Type *, Qualifiers>(Ty, Quals);
608  }
609 
611  return a.Ty == b.Ty && a.Quals == b.Quals;
612  }
614  return a.Ty != b.Ty || a.Quals != b.Quals;
615  }
616 };
617 
618 /// The kind of type we are substituting Objective-C type arguments into.
619 ///
620 /// The kind of substitution affects the replacement of type parameters when
621 /// no concrete type information is provided, e.g., when dealing with an
622 /// unspecialized type.
624  /// An ordinary type.
625  Ordinary,
626 
627  /// The result type of a method or function.
628  Result,
629 
630  /// The parameter type of a method or function.
631  Parameter,
632 
633  /// The type of a property.
634  Property,
635 
636  /// The superclass of a type.
637  Superclass,
638 };
639 
640 /// A (possibly-)qualified type.
641 ///
642 /// For efficiency, we don't store CV-qualified types as nodes on their
643 /// own: instead each reference to a type stores the qualifiers. This
644 /// greatly reduces the number of nodes we need to allocate for types (for
645 /// example we only need one for 'int', 'const int', 'volatile int',
646 /// 'const volatile int', etc).
647 ///
648 /// As an added efficiency bonus, instead of making this a pair, we
649 /// just store the two bits we care about in the low bits of the
650 /// pointer. To handle the packing/unpacking, we make QualType be a
651 /// simple wrapper class that acts like a smart pointer. A third bit
652 /// indicates whether there are extended qualifiers present, in which
653 /// case the pointer points to a special structure.
654 class QualType {
655  friend class QualifierCollector;
656 
657  // Thankfully, these are efficiently composable.
658  llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
660 
661  const ExtQuals *getExtQualsUnsafe() const {
662  return Value.getPointer().get<const ExtQuals*>();
663  }
664 
665  const Type *getTypePtrUnsafe() const {
666  return Value.getPointer().get<const Type*>();
667  }
668 
669  const ExtQualsTypeCommonBase *getCommonPtr() const {
670  assert(!isNull() && "Cannot retrieve a NULL type pointer");
671  auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
672  CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
673  return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
674  }
675 
676 public:
677  QualType() = default;
678  QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
679  QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
680 
681  unsigned getLocalFastQualifiers() const { return Value.getInt(); }
682  void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }
683 
684  /// Retrieves a pointer to the underlying (unqualified) type.
685  ///
686  /// This function requires that the type not be NULL. If the type might be
687  /// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
688  const Type *getTypePtr() const;
689 
690  const Type *getTypePtrOrNull() const;
691 
692  /// Retrieves a pointer to the name of the base type.
693  const IdentifierInfo *getBaseTypeIdentifier() const;
694 
695  /// Divides a QualType into its unqualified type and a set of local
696  /// qualifiers.
697  SplitQualType split() const;
698 
699  void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }
700 
701  static QualType getFromOpaquePtr(const void *Ptr) {
702  QualType T;
703  T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
704  return T;
705  }
706 
707  const Type &operator*() const {
708  return *getTypePtr();
709  }
710 
711  const Type *operator->() const {
712  return getTypePtr();
713  }
714 
715  bool isCanonical() const;
716  bool isCanonicalAsParam() const;
717 
718  /// Return true if this QualType doesn't point to a type yet.
719  bool isNull() const {
720  return Value.getPointer().isNull();
721  }
722 
723  /// Determine whether this particular QualType instance has the
724  /// "const" qualifier set, without looking through typedefs that may have
725  /// added "const" at a different level.
726  bool isLocalConstQualified() const {
727  return (getLocalFastQualifiers() & Qualifiers::Const);
728  }
729 
730  /// Determine whether this type is const-qualified.
731  bool isConstQualified() const;
732 
733  /// Determine whether this particular QualType instance has the
734  /// "restrict" qualifier set, without looking through typedefs that may have
735  /// added "restrict" at a different level.
737  return (getLocalFastQualifiers() & Qualifiers::Restrict);
738  }
739 
740  /// Determine whether this type is restrict-qualified.
741  bool isRestrictQualified() const;
742 
743  /// Determine whether this particular QualType instance has the
744  /// "volatile" qualifier set, without looking through typedefs that may have
745  /// added "volatile" at a different level.
747  return (getLocalFastQualifiers() & Qualifiers::Volatile);
748  }
749 
750  /// Determine whether this type is volatile-qualified.
751  bool isVolatileQualified() const;
752 
753  /// Determine whether this particular QualType instance has any
754  /// qualifiers, without looking through any typedefs that might add
755  /// qualifiers at a different level.
756  bool hasLocalQualifiers() const {
757  return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
758  }
759 
760  /// Determine whether this type has any qualifiers.
761  bool hasQualifiers() const;
762 
763  /// Determine whether this particular QualType instance has any
764  /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
765  /// instance.
767  return Value.getPointer().is<const ExtQuals*>();
768  }
769 
770  /// Retrieve the set of qualifiers local to this particular QualType
771  /// instance, not including any qualifiers acquired through typedefs or
772  /// other sugar.
773  Qualifiers getLocalQualifiers() const;
774 
775  /// Retrieve the set of qualifiers applied to this type.
776  Qualifiers getQualifiers() const;
777 
778  /// Retrieve the set of CVR (const-volatile-restrict) qualifiers
779  /// local to this particular QualType instance, not including any qualifiers
780  /// acquired through typedefs or other sugar.
781  unsigned getLocalCVRQualifiers() const {
782  return getLocalFastQualifiers();
783  }
784 
785  /// Retrieve the set of CVR (const-volatile-restrict) qualifiers
786  /// applied to this type.
787  unsigned getCVRQualifiers() const;
788 
789  bool isConstant(const ASTContext& Ctx) const {
790  return QualType::isConstant(*this, Ctx);
791  }
792 
793  /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
794  bool isPODType(const ASTContext &Context) const;
795 
796  /// Return true if this is a POD type according to the rules of the C++98
797  /// standard, regardless of the current compilation's language.
798  bool isCXX98PODType(const ASTContext &Context) const;
799 
800  /// Return true if this is a POD type according to the more relaxed rules
801  /// of the C++11 standard, regardless of the current compilation's language.
802  /// (C++0x [basic.types]p9). Note that, unlike
803  /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account.
804  bool isCXX11PODType(const ASTContext &Context) const;
805 
806  /// Return true if this is a trivial type per (C++0x [basic.types]p9)
807  bool isTrivialType(const ASTContext &Context) const;
808 
809  /// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
810  bool isTriviallyCopyableType(const ASTContext &Context) const;
811 
812 
813  /// Returns true if it is a class and it might be dynamic.
814  bool mayBeDynamicClass() const;
815 
816  /// Returns true if it is not a class or if the class might not be dynamic.
817  bool mayBeNotDynamicClass() const;
818 
819  // Don't promise in the API that anything besides 'const' can be
820  // easily added.
821 
822  /// Add the `const` type qualifier to this QualType.
823  void addConst() {
824  addFastQualifiers(Qualifiers::Const);
825  }
826  QualType withConst() const {
827  return withFastQualifiers(Qualifiers::Const);
828  }
829 
830  /// Add the `volatile` type qualifier to this QualType.
831  void addVolatile() {
832  addFastQualifiers(Qualifiers::Volatile);
833  }
835  return withFastQualifiers(Qualifiers::Volatile);
836  }
837 
838  /// Add the `restrict` qualifier to this QualType.
839  void addRestrict() {
840  addFastQualifiers(Qualifiers::Restrict);
841  }
843  return withFastQualifiers(Qualifiers::Restrict);
844  }
845 
846  QualType withCVRQualifiers(unsigned CVR) const {
847  return withFastQualifiers(CVR);
848  }
849 
850  void addFastQualifiers(unsigned TQs) {
851  assert(!(TQs & ~Qualifiers::FastMask)
852  && "non-fast qualifier bits set in mask!");
853  Value.setInt(Value.getInt() | TQs);
854  }
855 
856  void removeLocalConst();
857  void removeLocalVolatile();
858  void removeLocalRestrict();
859  void removeLocalCVRQualifiers(unsigned Mask);
860 
861  void removeLocalFastQualifiers() { Value.setInt(0); }
862  void removeLocalFastQualifiers(unsigned Mask) {
863  assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers");
864  Value.setInt(Value.getInt() & ~Mask);
865  }
866 
867  // Creates a type with the given qualifiers in addition to any
868  // qualifiers already on this type.
869  QualType withFastQualifiers(unsigned TQs) const {
870  QualType T = *this;
871  T.addFastQualifiers(TQs);
872  return T;
873  }
874 
875  // Creates a type with exactly the given fast qualifiers, removing
876  // any existing fast qualifiers.
878  return withoutLocalFastQualifiers().withFastQualifiers(TQs);
879  }
880 
881  // Removes fast qualifiers, but leaves any extended qualifiers in place.
883  QualType T = *this;
885  return T;
886  }
887 
888  QualType getCanonicalType() const;
889 
890  /// Return this type with all of the instance-specific qualifiers
891  /// removed, but without removing any qualifiers that may have been applied
892  /// through typedefs.
893  QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); }
894 
895  /// Retrieve the unqualified variant of the given type,
896  /// removing as little sugar as possible.
897  ///
898  /// This routine looks through various kinds of sugar to find the
899  /// least-desugared type that is unqualified. For example, given:
900  ///
901  /// \code
902  /// typedef int Integer;
903  /// typedef const Integer CInteger;
904  /// typedef CInteger DifferenceType;
905  /// \endcode
906  ///
907  /// Executing \c getUnqualifiedType() on the type \c DifferenceType will
908  /// desugar until we hit the type \c Integer, which has no qualifiers on it.
909  ///
910  /// The resulting type might still be qualified if it's sugar for an array
911  /// type. To strip qualifiers even from within a sugared array type, use
912  /// ASTContext::getUnqualifiedArrayType.
913  inline QualType getUnqualifiedType() const;
914 
915  /// Retrieve the unqualified variant of the given type, removing as little
916  /// sugar as possible.
917  ///
918  /// Like getUnqualifiedType(), but also returns the set of
919  /// qualifiers that were built up.
920  ///
921  /// The resulting type might still be qualified if it's sugar for an array
922  /// type. To strip qualifiers even from within a sugared array type, use
923  /// ASTContext::getUnqualifiedArrayType.
924  inline SplitQualType getSplitUnqualifiedType() const;
925 
926  /// Determine whether this type is more qualified than the other
927  /// given type, requiring exact equality for non-CVR qualifiers.
928  bool isMoreQualifiedThan(QualType Other) const;
929 
930  /// Determine whether this type is at least as qualified as the other
931  /// given type, requiring exact equality for non-CVR qualifiers.
932  bool isAtLeastAsQualifiedAs(QualType Other) const;
933 
934  QualType getNonReferenceType() const;
935 
936  /// Determine the type of a (typically non-lvalue) expression with the
937  /// specified result type.
938  ///
939  /// This routine should be used for expressions for which the return type is
940  /// explicitly specified (e.g., in a cast or call) and isn't necessarily
941  /// an lvalue. It removes a top-level reference (since there are no
942  /// expressions of reference type) and deletes top-level cvr-qualifiers
943  /// from non-class types (in C++) or all types (in C).
944  QualType getNonLValueExprType(const ASTContext &Context) const;
945 
946  /// Return the specified type with any "sugar" removed from
947  /// the type. This takes off typedefs, typeof's etc. If the outer level of
948  /// the type is already concrete, it returns it unmodified. This is similar
949  /// to getting the canonical type, but it doesn't remove *all* typedefs. For
950  /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
951  /// concrete.
952  ///
953  /// Qualifiers are left in place.
954  QualType getDesugaredType(const ASTContext &Context) const {
955  return getDesugaredType(*this, Context);
956  }
957 
959  return getSplitDesugaredType(*this);
960  }
961 
962  /// Return the specified type with one level of "sugar" removed from
963  /// the type.
964  ///
965  /// This routine takes off the first typedef, typeof, etc. If the outer level
966  /// of the type is already concrete, it returns it unmodified.
968  return getSingleStepDesugaredTypeImpl(*this, Context);
969  }
970 
971  /// Returns the specified type after dropping any
972  /// outer-level parentheses.
974  if (isa<ParenType>(*this))
975  return QualType::IgnoreParens(*this);
976  return *this;
977  }
978 
979  /// Indicate whether the specified types and qualifiers are identical.
980  friend bool operator==(const QualType &LHS, const QualType &RHS) {
981  return LHS.Value == RHS.Value;
982  }
983  friend bool operator!=(const QualType &LHS, const QualType &RHS) {
984  return LHS.Value != RHS.Value;
985  }
986  friend bool operator<(const QualType &LHS, const QualType &RHS) {
987  return LHS.Value < RHS.Value;
988  }
989 
990  static std::string getAsString(SplitQualType split,
991  const PrintingPolicy &Policy) {
992  return getAsString(split.Ty, split.Quals, Policy);
993  }
994  static std::string getAsString(const Type *ty, Qualifiers qs,
995  const PrintingPolicy &Policy);
996 
997  std::string getAsString() const;
998  std::string getAsString(const PrintingPolicy &Policy) const;
999 
1000  void print(raw_ostream &OS, const PrintingPolicy &Policy,
1001  const Twine &PlaceHolder = Twine(),
1002  unsigned Indentation = 0) const;
1003 
1004  static void print(SplitQualType split, raw_ostream &OS,
1005  const PrintingPolicy &policy, const Twine &PlaceHolder,
1006  unsigned Indentation = 0) {
1007  return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation);
1008  }
1009 
1010  static void print(const Type *ty, Qualifiers qs,
1011  raw_ostream &OS, const PrintingPolicy &policy,
1012  const Twine &PlaceHolder,
1013  unsigned Indentation = 0);
1014 
1015  void getAsStringInternal(std::string &Str,
1016  const PrintingPolicy &Policy) const;
1017 
1018  static void getAsStringInternal(SplitQualType split, std::string &out,
1019  const PrintingPolicy &policy) {
1020  return getAsStringInternal(split.Ty, split.Quals, out, policy);
1021  }
1022 
1023  static void getAsStringInternal(const Type *ty, Qualifiers qs,
1024  std::string &out,
1025  const PrintingPolicy &policy);
1026 
1028  const QualType &T;
1029  const PrintingPolicy &Policy;
1030  const Twine &PlaceHolder;
1031  unsigned Indentation;
1032 
1033  public:
1035  const Twine &PlaceHolder, unsigned Indentation)
1036  : T(T), Policy(Policy), PlaceHolder(PlaceHolder),
1037  Indentation(Indentation) {}
1038 
1039  friend raw_ostream &operator<<(raw_ostream &OS,
1040  const StreamedQualTypeHelper &SQT) {
1041  SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation);
1042  return OS;
1043  }
1044  };
1045 
1047  const Twine &PlaceHolder = Twine(),
1048  unsigned Indentation = 0) const {
1049  return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation);
1050  }
1051 
1052  void dump(const char *s) const;
1053  void dump() const;
1054  void dump(llvm::raw_ostream &OS) const;
1055 
1056  void Profile(llvm::FoldingSetNodeID &ID) const {
1057  ID.AddPointer(getAsOpaquePtr());
1058  }
1059 
1060  /// Check if this type has any address space qualifier.
1061  inline bool hasAddressSpace() const;
1062 
1063  /// Return the address space of this type.
1064  inline LangAS getAddressSpace() const;
1065 
1066  /// Returns gc attribute of this type.
1067  inline Qualifiers::GC getObjCGCAttr() const;
1068 
1069  /// true when Type is objc's weak.
1070  bool isObjCGCWeak() const {
1071  return getObjCGCAttr() == Qualifiers::Weak;
1072  }
1073 
1074  /// true when Type is objc's strong.
1075  bool isObjCGCStrong() const {
1076  return getObjCGCAttr() == Qualifiers::Strong;
1077  }
1078 
1079  /// Returns lifetime attribute of this type.
1081  return getQualifiers().getObjCLifetime();
1082  }
1083 
1085  return getQualifiers().hasNonTrivialObjCLifetime();
1086  }
1087 
1089  return getQualifiers().hasStrongOrWeakObjCLifetime();
1090  }
1091 
1092  // true when Type is objc's weak and weak is enabled but ARC isn't.
1093  bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const;
1094 
1096  /// The type does not fall into any of the following categories. Note that
1097  /// this case is zero-valued so that values of this enum can be used as a
1098  /// boolean condition for non-triviality.
1100 
1101  /// The type is an Objective-C retainable pointer type that is qualified
1102  /// with the ARC __strong qualifier.
1104 
1105  /// The type is an Objective-C retainable pointer type that is qualified
1106  /// with the ARC __weak qualifier.
1108 
1109  /// The type is a struct containing a field whose type is not PCK_Trivial.
1110  PDIK_Struct
1111  };
1112 
1113  /// Functions to query basic properties of non-trivial C struct types.
1114 
1115  /// Check if this is a non-trivial type that would cause a C struct
1116  /// transitively containing this type to be non-trivial to default initialize
1117  /// and return the kind.
1119  isNonTrivialToPrimitiveDefaultInitialize() const;
1120 
1122  /// The type does not fall into any of the following categories. Note that
1123  /// this case is zero-valued so that values of this enum can be used as a
1124  /// boolean condition for non-triviality.
1126 
1127  /// The type would be trivial except that it is volatile-qualified. Types
1128  /// that fall into one of the other non-trivial cases may additionally be
1129  /// volatile-qualified.
1131 
1132  /// The type is an Objective-C retainable pointer type that is qualified
1133  /// with the ARC __strong qualifier.
1135 
1136  /// The type is an Objective-C retainable pointer type that is qualified
1137  /// with the ARC __weak qualifier.
1139 
1140  /// The type is a struct containing a field whose type is neither
1141  /// PCK_Trivial nor PCK_VolatileTrivial.
1142  /// Note that a C++ struct type does not necessarily match this; C++ copying
1143  /// semantics are too complex to express here, in part because they depend
1144  /// on the exact constructor or assignment operator that is chosen by
1145  /// overload resolution to do the copy.
1146  PCK_Struct
1147  };
1148 
1149  /// Check if this is a non-trivial type that would cause a C struct
1150  /// transitively containing this type to be non-trivial to copy and return the
1151  /// kind.
1152  PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const;
1153 
1154  /// Check if this is a non-trivial type that would cause a C struct
1155  /// transitively containing this type to be non-trivial to destructively
1156  /// move and return the kind. Destructive move in this context is a C++-style
1157  /// move in which the source object is placed in a valid but unspecified state
1158  /// after it is moved, as opposed to a truly destructive move in which the
1159  /// source object is placed in an uninitialized state.
1160  PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const;
1161 
1167  DK_nontrivial_c_struct
1168  };
1169 
1170  /// Returns a nonzero value if objects of this type require
1171  /// non-trivial work to clean up after. Non-zero because it's
1172  /// conceivable that qualifiers (objc_gc(weak)?) could make
1173  /// something require destruction.
1175  return isDestructedTypeImpl(*this);
1176  }
1177 
1178  /// Check if this is or contains a C union that is non-trivial to
1179  /// default-initialize, which is a union that has a member that is non-trivial
1180  /// to default-initialize. If this returns true,
1181  /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct.
1182  bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const;
1183 
1184  /// Check if this is or contains a C union that is non-trivial to destruct,
1185  /// which is a union that has a member that is non-trivial to destruct. If
1186  /// this returns true, isDestructedType returns DK_nontrivial_c_struct.
1187  bool hasNonTrivialToPrimitiveDestructCUnion() const;
1188 
1189  /// Check if this is or contains a C union that is non-trivial to copy, which
1190  /// is a union that has a member that is non-trivial to copy. If this returns
1191  /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct.
1192  bool hasNonTrivialToPrimitiveCopyCUnion() const;
1193 
1194  /// Determine whether expressions of the given type are forbidden
1195  /// from being lvalues in C.
1196  ///
1197  /// The expression types that are forbidden to be lvalues are:
1198  /// - 'void', but not qualified void
1199  /// - function types
1200  ///
1201  /// The exact rule here is C99 6.3.2.1:
1202  /// An lvalue is an expression with an object type or an incomplete
1203  /// type other than void.
1204  bool isCForbiddenLValueType() const;
1205 
1206  /// Substitute type arguments for the Objective-C type parameters used in the
1207  /// subject type.
1208  ///
1209  /// \param ctx ASTContext in which the type exists.
1210  ///
1211  /// \param typeArgs The type arguments that will be substituted for the
1212  /// Objective-C type parameters in the subject type, which are generally
1213  /// computed via \c Type::getObjCSubstitutions. If empty, the type
1214  /// parameters will be replaced with their bounds or id/Class, as appropriate
1215  /// for the context.
1216  ///
1217  /// \param context The context in which the subject type was written.
1218  ///
1219  /// \returns the resulting type.
1220  QualType substObjCTypeArgs(ASTContext &ctx,
1221  ArrayRef<QualType> typeArgs,
1222  ObjCSubstitutionContext context) const;
1223 
1224  /// Substitute type arguments from an object type for the Objective-C type
1225  /// parameters used in the subject type.
1226  ///
1227  /// This operation combines the computation of type arguments for
1228  /// substitution (\c Type::getObjCSubstitutions) with the actual process of
1229  /// substitution (\c QualType::substObjCTypeArgs) for the convenience of
1230  /// callers that need to perform a single substitution in isolation.
1231  ///
1232  /// \param objectType The type of the object whose member type we're
1233  /// substituting into. For example, this might be the receiver of a message
1234  /// or the base of a property access.
1235  ///
1236  /// \param dc The declaration context from which the subject type was
1237  /// retrieved, which indicates (for example) which type parameters should
1238  /// be substituted.
1239  ///
1240  /// \param context The context in which the subject type was written.
1241  ///
1242  /// \returns the subject type after replacing all of the Objective-C type
1243  /// parameters with their corresponding arguments.
1244  QualType substObjCMemberType(QualType objectType,
1245  const DeclContext *dc,
1246  ObjCSubstitutionContext context) const;
1247 
1248  /// Strip Objective-C "__kindof" types from the given type.
1249  QualType stripObjCKindOfType(const ASTContext &ctx) const;
1250 
1251  /// Remove all qualifiers including _Atomic.
1252  QualType getAtomicUnqualifiedType() const;
1253 
1254 private:
1255  // These methods are implemented in a separate translation unit;
1256  // "static"-ize them to avoid creating temporary QualTypes in the
1257  // caller.
1258  static bool isConstant(QualType T, const ASTContext& Ctx);
1259  static QualType getDesugaredType(QualType T, const ASTContext &Context);
1260  static SplitQualType getSplitDesugaredType(QualType T);
1261  static SplitQualType getSplitUnqualifiedTypeImpl(QualType type);
1262  static QualType getSingleStepDesugaredTypeImpl(QualType type,
1263  const ASTContext &C);
1264  static QualType IgnoreParens(QualType T);
1265  static DestructionKind isDestructedTypeImpl(QualType type);
1266 
1267  /// Check if \param RD is or contains a non-trivial C union.
1268  static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD);
1269  static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD);
1270  static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD);
1271 };
1272 
1273 } // namespace clang
1274 
1275 namespace llvm {
1276 
1277 /// Implement simplify_type for QualType, so that we can dyn_cast from QualType
1278 /// to a specific Type class.
1279 template<> struct simplify_type< ::clang::QualType> {
1281 
1283  return Val.getTypePtr();
1284  }
1285 };
1286 
1287 // Teach SmallPtrSet that QualType is "basically a pointer".
1288 template<>
1289 struct PointerLikeTypeTraits<clang::QualType> {
1290  static inline void *getAsVoidPointer(clang::QualType P) {
1291  return P.getAsOpaquePtr();
1292  }
1293 
1294  static inline clang::QualType getFromVoidPointer(void *P) {
1296  }
1297 
1298  // Various qualifiers go in low bits.
1299  enum { NumLowBitsAvailable = 0 };
1300 };
1301 
1302 } // namespace llvm
1303 
1304 namespace clang {
1305 
1306 /// Base class that is common to both the \c ExtQuals and \c Type
1307 /// classes, which allows \c QualType to access the common fields between the
1308 /// two.
1310  friend class ExtQuals;
1311  friend class QualType;
1312  friend class Type;
1313 
1314  /// The "base" type of an extended qualifiers type (\c ExtQuals) or
1315  /// a self-referential pointer (for \c Type).
1316  ///
1317  /// This pointer allows an efficient mapping from a QualType to its
1318  /// underlying type pointer.
1319  const Type *const BaseType;
1320 
1321  /// The canonical type of this type. A QualType.
1322  QualType CanonicalType;
1323 
1324  ExtQualsTypeCommonBase(const Type *baseType, QualType canon)
1325  : BaseType(baseType), CanonicalType(canon) {}
1326 };
1327 
1328 /// We can encode up to four bits in the low bits of a
1329 /// type pointer, but there are many more type qualifiers that we want
1330 /// to be able to apply to an arbitrary type. Therefore we have this
1331 /// struct, intended to be heap-allocated and used by QualType to
1332 /// store qualifiers.
1333 ///
1334 /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers
1335 /// in three low bits on the QualType pointer; a fourth bit records whether
1336 /// the pointer is an ExtQuals node. The extended qualifiers (address spaces,
1337 /// Objective-C GC attributes) are much more rare.
1338 class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode {
1339  // NOTE: changing the fast qualifiers should be straightforward as
1340  // long as you don't make 'const' non-fast.
1341  // 1. Qualifiers:
1342  // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ).
1343  // Fast qualifiers must occupy the low-order bits.
1344  // b) Update Qualifiers::FastWidth and FastMask.
1345  // 2. QualType:
1346  // a) Update is{Volatile,Restrict}Qualified(), defined inline.
1347  // b) Update remove{Volatile,Restrict}, defined near the end of
1348  // this header.
1349  // 3. ASTContext:
1350  // a) Update get{Volatile,Restrict}Type.
1351 
1352  /// The immutable set of qualifiers applied by this node. Always contains
1353  /// extended qualifiers.
1354  Qualifiers Quals;
1355 
1356  ExtQuals *this_() { return this; }
1357 
1358 public:
1359  ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
1360  : ExtQualsTypeCommonBase(baseType,
1361  canon.isNull() ? QualType(this_(), 0) : canon),
1362  Quals(quals) {
1363  assert(Quals.hasNonFastQualifiers()
1364  && "ExtQuals created with no fast qualifiers");
1365  assert(!Quals.hasFastQualifiers()
1366  && "ExtQuals created with fast qualifiers");
1367  }
1368 
1369  Qualifiers getQualifiers() const { return Quals; }
1370 
1371  bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); }
1372  Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); }
1373 
1374  bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); }
1376  return Quals.getObjCLifetime();
1377  }
1378 
1379  bool hasAddressSpace() const { return Quals.hasAddressSpace(); }
1380  LangAS getAddressSpace() const { return Quals.getAddressSpace(); }
1381 
1382  const Type *getBaseType() const { return BaseType; }
1383 
1384 public:
1385  void Profile(llvm::FoldingSetNodeID &ID) const {
1386  Profile(ID, getBaseType(), Quals);
1387  }
1388 
1389  static void Profile(llvm::FoldingSetNodeID &ID,
1390  const Type *BaseType,
1391  Qualifiers Quals) {
1392  assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!");
1393  ID.AddPointer(BaseType);
1394  Quals.Profile(ID);
1395  }
1396 };
1397 
1398 /// The kind of C++11 ref-qualifier associated with a function type.
1399 /// This determines whether a member function's "this" object can be an
1400 /// lvalue, rvalue, or neither.
1402  /// No ref-qualifier was provided.
1403  RQ_None = 0,
1404 
1405  /// An lvalue ref-qualifier was provided (\c &).
1407 
1408  /// An rvalue ref-qualifier was provided (\c &&).
1410 };
1411 
1412 /// Which keyword(s) were used to create an AutoType.
1413 enum class AutoTypeKeyword {
1414  /// auto
1415  Auto,
1416 
1417  /// decltype(auto)
1418  DecltypeAuto,
1419 
1420  /// __auto_type (GNU extension)
1421  GNUAutoType
1422 };
1423 
1424 /// The base class of the type hierarchy.
1425 ///
1426 /// A central concept with types is that each type always has a canonical
1427 /// type. A canonical type is the type with any typedef names stripped out
1428 /// of it or the types it references. For example, consider:
1429 ///
1430 /// typedef int foo;
1431 /// typedef foo* bar;
1432 /// 'int *' 'foo *' 'bar'
1433 ///
1434 /// There will be a Type object created for 'int'. Since int is canonical, its
1435 /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a
1436 /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next
1437 /// there is a PointerType that represents 'int*', which, like 'int', is
1438 /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical
1439 /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type
1440 /// is also 'int*'.
1441 ///
1442 /// Non-canonical types are useful for emitting diagnostics, without losing
1443 /// information about typedefs being used. Canonical types are useful for type
1444 /// comparisons (they allow by-pointer equality tests) and useful for reasoning
1445 /// about whether something has a particular form (e.g. is a function type),
1446 /// because they implicitly, recursively, strip all typedefs out of a type.
1447 ///
1448 /// Types, once created, are immutable.
1449 ///
1450 class alignas(8) Type : public ExtQualsTypeCommonBase {
1451 public:
1452  enum TypeClass {
1453 #define TYPE(Class, Base) Class,
1454 #define LAST_TYPE(Class) TypeLast = Class
1455 #define ABSTRACT_TYPE(Class, Base)
1456 #include "clang/AST/TypeNodes.inc"
1457  };
1458 
1459 private:
1460  /// Bitfields required by the Type class.
1461  class TypeBitfields {
1462  friend class Type;
1463  template <class T> friend class TypePropertyCache;
1464 
1465  /// TypeClass bitfield - Enum that specifies what subclass this belongs to.
1466  unsigned TC : 8;
1467 
1468  /// Whether this type is a dependent type (C++ [temp.dep.type]).
1469  unsigned Dependent : 1;
1470 
1471  /// Whether this type somehow involves a template parameter, even
1472  /// if the resolution of the type does not depend on a template parameter.
1473  unsigned InstantiationDependent : 1;
1474 
1475  /// Whether this type is a variably-modified type (C99 6.7.5).
1476  unsigned VariablyModified : 1;
1477 
1478  /// Whether this type contains an unexpanded parameter pack
1479  /// (for C++11 variadic templates).
1480  unsigned ContainsUnexpandedParameterPack : 1;
1481 
1482  /// True if the cache (i.e. the bitfields here starting with
1483  /// 'Cache') is valid.
1484  mutable unsigned CacheValid : 1;
1485 
1486  /// Linkage of this type.
1487  mutable unsigned CachedLinkage : 3;
1488 
1489  /// Whether this type involves and local or unnamed types.
1490  mutable unsigned CachedLocalOrUnnamed : 1;
1491 
1492  /// Whether this type comes from an AST file.
1493  mutable unsigned FromAST : 1;
1494 
1495  bool isCacheValid() const {
1496  return CacheValid;
1497  }
1498 
1499  Linkage getLinkage() const {
1500  assert(isCacheValid() && "getting linkage from invalid cache");
1501  return static_cast<Linkage>(CachedLinkage);
1502  }
1503 
1504  bool hasLocalOrUnnamedType() const {
1505  assert(isCacheValid() && "getting linkage from invalid cache");
1506  return CachedLocalOrUnnamed;
1507  }
1508  };
1509  enum { NumTypeBits = 18 };
1510 
1511 protected:
1512  // These classes allow subclasses to somewhat cleanly pack bitfields
1513  // into Type.
1514 
1516  friend class ArrayType;
1517 
1518  unsigned : NumTypeBits;
1519 
1520  /// CVR qualifiers from declarations like
1521  /// 'int X[static restrict 4]'. For function parameters only.
1522  unsigned IndexTypeQuals : 3;
1523 
1524  /// Storage class qualifiers from declarations like
1525  /// 'int X[static restrict 4]'. For function parameters only.
1526  /// Actually an ArrayType::ArraySizeModifier.
1527  unsigned SizeModifier : 3;
1528  };
1529 
1531  friend class ConstantArrayType;
1532 
1533  unsigned : NumTypeBits + 3 + 3;
1534 
1535  /// Whether we have a stored size expression.
1536  unsigned HasStoredSizeExpr : 1;
1537  };
1538 
1540  friend class BuiltinType;
1541 
1542  unsigned : NumTypeBits;
1543 
1544  /// The kind (BuiltinType::Kind) of builtin type this is.
1545  unsigned Kind : 8;
1546  };
1547 
1548  /// FunctionTypeBitfields store various bits belonging to FunctionProtoType.
1549  /// Only common bits are stored here. Additional uncommon bits are stored
1550  /// in a trailing object after FunctionProtoType.
1552  friend class FunctionProtoType;
1553  friend class FunctionType;
1554 
1555  unsigned : NumTypeBits;
1556 
1557  /// Extra information which affects how the function is called, like
1558  /// regparm and the calling convention.
1559  unsigned ExtInfo : 12;
1560 
1561  /// The ref-qualifier associated with a \c FunctionProtoType.
1562  ///
1563  /// This is a value of type \c RefQualifierKind.
1564  unsigned RefQualifier : 2;
1565 
1566  /// Used only by FunctionProtoType, put here to pack with the
1567  /// other bitfields.
1568  /// The qualifiers are part of FunctionProtoType because...
1569  ///
1570  /// C++ 8.3.5p4: The return type, the parameter type list and the
1571  /// cv-qualifier-seq, [...], are part of the function type.
1572  unsigned FastTypeQuals : Qualifiers::FastWidth;
1573  /// Whether this function has extended Qualifiers.
1574  unsigned HasExtQuals : 1;
1575 
1576  /// The number of parameters this function has, not counting '...'.
1577  /// According to [implimits] 8 bits should be enough here but this is
1578  /// somewhat easy to exceed with metaprogramming and so we would like to
1579  /// keep NumParams as wide as reasonably possible.
1580  unsigned NumParams : 16;
1581 
1582  /// The type of exception specification this function has.
1583  unsigned ExceptionSpecType : 4;
1584 
1585  /// Whether this function has extended parameter information.
1586  unsigned HasExtParameterInfos : 1;
1587 
1588  /// Whether the function is variadic.
1589  unsigned Variadic : 1;
1590 
1591  /// Whether this function has a trailing return type.
1592  unsigned HasTrailingReturn : 1;
1593  };
1594 
1596  friend class ObjCObjectType;
1597 
1598  unsigned : NumTypeBits;
1599 
1600  /// The number of type arguments stored directly on this object type.
1601  unsigned NumTypeArgs : 7;
1602 
1603  /// The number of protocols stored directly on this object type.
1604  unsigned NumProtocols : 6;
1605 
1606  /// Whether this is a "kindof" type.
1607  unsigned IsKindOf : 1;
1608  };
1609 
1611  friend class ReferenceType;
1612 
1613  unsigned : NumTypeBits;
1614 
1615  /// True if the type was originally spelled with an lvalue sigil.
1616  /// This is never true of rvalue references but can also be false
1617  /// on lvalue references because of C++0x [dcl.typedef]p9,
1618  /// as follows:
1619  ///
1620  /// typedef int &ref; // lvalue, spelled lvalue
1621  /// typedef int &&rvref; // rvalue
1622  /// ref &a; // lvalue, inner ref, spelled lvalue
1623  /// ref &&a; // lvalue, inner ref
1624  /// rvref &a; // lvalue, inner ref, spelled lvalue
1625  /// rvref &&a; // rvalue, inner ref
1626  unsigned SpelledAsLValue : 1;
1627 
1628  /// True if the inner type is a reference type. This only happens
1629  /// in non-canonical forms.
1630  unsigned InnerRef : 1;
1631  };
1632 
1634  friend class TypeWithKeyword;
1635 
1636  unsigned : NumTypeBits;
1637 
1638  /// An ElaboratedTypeKeyword. 8 bits for efficient access.
1639  unsigned Keyword : 8;
1640  };
1641 
1642  enum { NumTypeWithKeywordBits = 8 };
1643 
1645  friend class ElaboratedType;
1646 
1647  unsigned : NumTypeBits;
1648  unsigned : NumTypeWithKeywordBits;
1649 
1650  /// Whether the ElaboratedType has a trailing OwnedTagDecl.
1651  unsigned HasOwnedTagDecl : 1;
1652  };
1653 
1655  friend class VectorType;
1656  friend class DependentVectorType;
1657 
1658  unsigned : NumTypeBits;
1659 
1660  /// The kind of vector, either a generic vector type or some
1661  /// target-specific vector type such as for AltiVec or Neon.
1662  unsigned VecKind : 3;
1663 
1664  /// The number of elements in the vector.
1665  unsigned NumElements : 29 - NumTypeBits;
1666 
1667  enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 };
1668  };
1669 
1671  friend class AttributedType;
1672 
1673  unsigned : NumTypeBits;
1674 
1675  /// An AttributedType::Kind
1676  unsigned AttrKind : 32 - NumTypeBits;
1677  };
1678 
1680  friend class AutoType;
1681 
1682  unsigned : NumTypeBits;
1683 
1684  /// Was this placeholder type spelled as 'auto', 'decltype(auto)',
1685  /// or '__auto_type'? AutoTypeKeyword value.
1686  unsigned Keyword : 2;
1687 
1688  /// The number of template arguments in the type-constraints, which is
1689  /// expected to be able to hold at least 1024 according to [implimits].
1690  /// However as this limit is somewhat easy to hit with template
1691  /// metaprogramming we'd prefer to keep it as large as possible.
1692  /// At the moment it has been left as a non-bitfield since this type
1693  /// safely fits in 64 bits as an unsigned, so there is no reason to
1694  /// introduce the performance impact of a bitfield.
1695  unsigned NumArgs;
1696  };
1697 
1700 
1701  unsigned : NumTypeBits;
1702 
1703  /// The number of template arguments in \c Arguments, which is
1704  /// expected to be able to hold at least 1024 according to [implimits].
1705  /// However as this limit is somewhat easy to hit with template
1706  /// metaprogramming we'd prefer to keep it as large as possible.
1707  /// At the moment it has been left as a non-bitfield since this type
1708  /// safely fits in 64 bits as an unsigned, so there is no reason to
1709  /// introduce the performance impact of a bitfield.
1710  unsigned NumArgs;
1711  };
1712 
1715 
1716  unsigned : NumTypeBits;
1717 
1718  /// Whether this template specialization type is a substituted type alias.
1719  unsigned TypeAlias : 1;
1720 
1721  /// The number of template arguments named in this class template
1722  /// specialization, which is expected to be able to hold at least 1024
1723  /// according to [implimits]. However, as this limit is somewhat easy to
1724  /// hit with template metaprogramming we'd prefer to keep it as large
1725  /// as possible. At the moment it has been left as a non-bitfield since
1726  /// this type safely fits in 64 bits as an unsigned, so there is no reason
1727  /// to introduce the performance impact of a bitfield.
1728  unsigned NumArgs;
1729  };
1730 
1733 
1734  unsigned : NumTypeBits;
1735  unsigned : NumTypeWithKeywordBits;
1736 
1737  /// The number of template arguments named in this class template
1738  /// specialization, which is expected to be able to hold at least 1024
1739  /// according to [implimits]. However, as this limit is somewhat easy to
1740  /// hit with template metaprogramming we'd prefer to keep it as large
1741  /// as possible. At the moment it has been left as a non-bitfield since
1742  /// this type safely fits in 64 bits as an unsigned, so there is no reason
1743  /// to introduce the performance impact of a bitfield.
1744  unsigned NumArgs;
1745  };
1746 
1748  friend class PackExpansionType;
1749 
1750  unsigned : NumTypeBits;
1751 
1752  /// The number of expansions that this pack expansion will
1753  /// generate when substituted (+1), which is expected to be able to
1754  /// hold at least 1024 according to [implimits]. However, as this limit
1755  /// is somewhat easy to hit with template metaprogramming we'd prefer to
1756  /// keep it as large as possible. At the moment it has been left as a
1757  /// non-bitfield since this type safely fits in 64 bits as an unsigned, so
1758  /// there is no reason to introduce the performance impact of a bitfield.
1759  ///
1760  /// This field will only have a non-zero value when some of the parameter
1761  /// packs that occur within the pattern have been substituted but others
1762  /// have not.
1763  unsigned NumExpansions;
1764  };
1765 
1766  union {
1767  TypeBitfields TypeBits;
1784 
1785  static_assert(sizeof(TypeBitfields) <= 8,
1786  "TypeBitfields is larger than 8 bytes!");
1787  static_assert(sizeof(ArrayTypeBitfields) <= 8,
1788  "ArrayTypeBitfields is larger than 8 bytes!");
1789  static_assert(sizeof(AttributedTypeBitfields) <= 8,
1790  "AttributedTypeBitfields is larger than 8 bytes!");
1791  static_assert(sizeof(AutoTypeBitfields) <= 8,
1792  "AutoTypeBitfields is larger than 8 bytes!");
1793  static_assert(sizeof(BuiltinTypeBitfields) <= 8,
1794  "BuiltinTypeBitfields is larger than 8 bytes!");
1795  static_assert(sizeof(FunctionTypeBitfields) <= 8,
1796  "FunctionTypeBitfields is larger than 8 bytes!");
1797  static_assert(sizeof(ObjCObjectTypeBitfields) <= 8,
1798  "ObjCObjectTypeBitfields is larger than 8 bytes!");
1799  static_assert(sizeof(ReferenceTypeBitfields) <= 8,
1800  "ReferenceTypeBitfields is larger than 8 bytes!");
1801  static_assert(sizeof(TypeWithKeywordBitfields) <= 8,
1802  "TypeWithKeywordBitfields is larger than 8 bytes!");
1803  static_assert(sizeof(ElaboratedTypeBitfields) <= 8,
1804  "ElaboratedTypeBitfields is larger than 8 bytes!");
1805  static_assert(sizeof(VectorTypeBitfields) <= 8,
1806  "VectorTypeBitfields is larger than 8 bytes!");
1807  static_assert(sizeof(SubstTemplateTypeParmPackTypeBitfields) <= 8,
1808  "SubstTemplateTypeParmPackTypeBitfields is larger"
1809  " than 8 bytes!");
1810  static_assert(sizeof(TemplateSpecializationTypeBitfields) <= 8,
1811  "TemplateSpecializationTypeBitfields is larger"
1812  " than 8 bytes!");
1813  static_assert(sizeof(DependentTemplateSpecializationTypeBitfields) <= 8,
1814  "DependentTemplateSpecializationTypeBitfields is larger"
1815  " than 8 bytes!");
1816  static_assert(sizeof(PackExpansionTypeBitfields) <= 8,
1817  "PackExpansionTypeBitfields is larger than 8 bytes");
1818  };
1819 
1820 private:
1821  template <class T> friend class TypePropertyCache;
1822 
1823  /// Set whether this type comes from an AST file.
1824  void setFromAST(bool V = true) const {
1825  TypeBits.FromAST = V;
1826  }
1827 
1828 protected:
1829  friend class ASTContext;
1830 
1831  Type(TypeClass tc, QualType canon, bool Dependent,
1832  bool InstantiationDependent, bool VariablyModified,
1833  bool ContainsUnexpandedParameterPack)
1834  : ExtQualsTypeCommonBase(this,
1835  canon.isNull() ? QualType(this_(), 0) : canon) {
1836  TypeBits.TC = tc;
1837  TypeBits.Dependent = Dependent;
1838  TypeBits.InstantiationDependent = Dependent || InstantiationDependent;
1839  TypeBits.VariablyModified = VariablyModified;
1840  TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack;
1841  TypeBits.CacheValid = false;
1842  TypeBits.CachedLocalOrUnnamed = false;
1843  TypeBits.CachedLinkage = NoLinkage;
1844  TypeBits.FromAST = false;
1845  }
1846 
1847  // silence VC++ warning C4355: 'this' : used in base member initializer list
1848  Type *this_() { return this; }
1849 
1850  void setDependent(bool D = true) {
1851  TypeBits.Dependent = D;
1852  if (D)
1853  TypeBits.InstantiationDependent = true;
1854  }
1855 
1856  void setInstantiationDependent(bool D = true) {
1857  TypeBits.InstantiationDependent = D; }
1858 
1859  void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; }
1860 
1861  void setContainsUnexpandedParameterPack(bool PP = true) {
1862  TypeBits.ContainsUnexpandedParameterPack = PP;
1863  }
1864 
1865 public:
1866  friend class ASTReader;
1867  friend class ASTWriter;
1868  template <class T> friend class serialization::AbstractTypeReader;
1869  template <class T> friend class serialization::AbstractTypeWriter;
1870 
1871  Type(const Type &) = delete;
1872  Type(Type &&) = delete;
1873  Type &operator=(const Type &) = delete;
1874  Type &operator=(Type &&) = delete;
1875 
1876  TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); }
1877 
1878  /// Whether this type comes from an AST file.
1879  bool isFromAST() const { return TypeBits.FromAST; }
1880 
1881  /// Whether this type is or contains an unexpanded parameter
1882  /// pack, used to support C++0x variadic templates.
1883  ///
1884  /// A type that contains a parameter pack shall be expanded by the
1885  /// ellipsis operator at some point. For example, the typedef in the
1886  /// following example contains an unexpanded parameter pack 'T':
1887  ///
1888  /// \code
1889  /// template<typename ...T>
1890  /// struct X {
1891  /// typedef T* pointer_types; // ill-formed; T is a parameter pack.
1892  /// };
1893  /// \endcode
1894  ///
1895  /// Note that this routine does not specify which
1897  return TypeBits.ContainsUnexpandedParameterPack;
1898  }
1899 
1900  /// Determines if this type would be canonical if it had no further
1901  /// qualification.
1902  bool isCanonicalUnqualified() const {
1903  return CanonicalType == QualType(this, 0);
1904  }
1905 
1906  /// Pull a single level of sugar off of this locally-unqualified type.
1907  /// Users should generally prefer SplitQualType::getSingleStepDesugaredType()
1908  /// or QualType::getSingleStepDesugaredType(const ASTContext&).
1909  QualType getLocallyUnqualifiedSingleStepDesugaredType() const;
1910 
1911  /// Types are partitioned into 3 broad categories (C99 6.2.5p1):
1912  /// object types, function types, and incomplete types.
1913 
1914  /// Return true if this is an incomplete type.
1915  /// A type that can describe objects, but which lacks information needed to
1916  /// determine its size (e.g. void, or a fwd declared struct). Clients of this
1917  /// routine will need to determine if the size is actually required.
1918  ///
1919  /// Def If non-null, and the type refers to some kind of declaration
1920  /// that can be completed (such as a C struct, C++ class, or Objective-C
1921  /// class), will be set to the declaration.
1922  bool isIncompleteType(NamedDecl **Def = nullptr) const;
1923 
1924  /// Return true if this is an incomplete or object
1925  /// type, in other words, not a function type.
1927  return !isFunctionType();
1928  }
1929 
1930  /// Determine whether this type is an object type.
1931  bool isObjectType() const {
1932  // C++ [basic.types]p8:
1933  // An object type is a (possibly cv-qualified) type that is not a
1934  // function type, not a reference type, and not a void type.
1935  return !isReferenceType() && !isFunctionType() && !isVoidType();
1936  }
1937 
1938  /// Return true if this is a literal type
1939  /// (C++11 [basic.types]p10)
1940  bool isLiteralType(const ASTContext &Ctx) const;
1941 
1942  /// Test if this type is a standard-layout type.
1943  /// (C++0x [basic.type]p9)
1944  bool isStandardLayoutType() const;
1945 
1946  /// Helper methods to distinguish type categories. All type predicates
1947  /// operate on the canonical type, ignoring typedefs and qualifiers.
1948 
1949  /// Returns true if the type is a builtin type.
1950  bool isBuiltinType() const;
1951 
1952  /// Test for a particular builtin type.
1953  bool isSpecificBuiltinType(unsigned K) const;
1954 
1955  /// Test for a type which does not represent an actual type-system type but
1956  /// is instead used as a placeholder for various convenient purposes within
1957  /// Clang. All such types are BuiltinTypes.
1958  bool isPlaceholderType() const;
1959  const BuiltinType *getAsPlaceholderType() const;
1960 
1961  /// Test for a specific placeholder type.
1962  bool isSpecificPlaceholderType(unsigned K) const;
1963 
1964  /// Test for a placeholder type other than Overload; see
1965  /// BuiltinType::isNonOverloadPlaceholderType.
1966  bool isNonOverloadPlaceholderType() const;
1967 
1968  /// isIntegerType() does *not* include complex integers (a GCC extension).
1969  /// isComplexIntegerType() can be used to test for complex integers.
1970  bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum)
1971  bool isEnumeralType() const;
1972 
1973  /// Determine whether this type is a scoped enumeration type.
1974  bool isScopedEnumeralType() const;
1975  bool isBooleanType() const;
1976  bool isCharType() const;
1977  bool isWideCharType() const;
1978  bool isChar8Type() const;
1979  bool isChar16Type() const;
1980  bool isChar32Type() const;
1981  bool isAnyCharacterType() const;
1982  bool isIntegralType(const ASTContext &Ctx) const;
1983 
1984  /// Determine whether this type is an integral or enumeration type.
1985  bool isIntegralOrEnumerationType() const;
1986 
1987  /// Determine whether this type is an integral or unscoped enumeration type.
1988  bool isIntegralOrUnscopedEnumerationType() const;
1989  bool isUnscopedEnumerationType() const;
1990 
1991  /// Floating point categories.
1992  bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double)
1993  /// isComplexType() does *not* include complex integers (a GCC extension).
1994  /// isComplexIntegerType() can be used to test for complex integers.
1995  bool isComplexType() const; // C99 6.2.5p11 (complex)
1996  bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int.
1997  bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex)
1998  bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half)
1999  bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661
2000  bool isFloat128Type() const;
2001  bool isRealType() const; // C99 6.2.5p17 (real floating + integer)
2002  bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating)
2003  bool isVoidType() const; // C99 6.2.5p19
2004  bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers)
2005  bool isAggregateType() const;
2006  bool isFundamentalType() const;
2007  bool isCompoundType() const;
2008 
2009  // Type Predicates: Check to see if this type is structurally the specified
2010  // type, ignoring typedefs and qualifiers.
2011  bool isFunctionType() const;
2012  bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); }
2013  bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); }
2014  bool isPointerType() const;
2015  bool isAnyPointerType() const; // Any C pointer or ObjC object pointer
2016  bool isBlockPointerType() const;
2017  bool isVoidPointerType() const;
2018  bool isReferenceType() const;
2019  bool isLValueReferenceType() const;
2020  bool isRValueReferenceType() const;
2021  bool isObjectPointerType() const;
2022  bool isFunctionPointerType() const;
2023  bool isFunctionReferenceType() const;
2024  bool isMemberPointerType() const;
2025  bool isMemberFunctionPointerType() const;
2026  bool isMemberDataPointerType() const;
2027  bool isArrayType() const;
2028  bool isConstantArrayType() const;
2029  bool isIncompleteArrayType() const;
2030  bool isVariableArrayType() const;
2031  bool isDependentSizedArrayType() const;
2032  bool isRecordType() const;
2033  bool isClassType() const;
2034  bool isStructureType() const;
2035  bool isObjCBoxableRecordType() const;
2036  bool isInterfaceType() const;
2037  bool isStructureOrClassType() const;
2038  bool isUnionType() const;
2039  bool isComplexIntegerType() const; // GCC _Complex integer type.
2040  bool isVectorType() const; // GCC vector type.
2041  bool isExtVectorType() const; // Extended vector type.
2042  bool isDependentAddressSpaceType() const; // value-dependent address space qualifier
2043  bool isObjCObjectPointerType() const; // pointer to ObjC object
2044  bool isObjCRetainableType() const; // ObjC object or block pointer
2045  bool isObjCLifetimeType() const; // (array of)* retainable type
2046  bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type
2047  bool isObjCNSObjectType() const; // __attribute__((NSObject))
2048  bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class))
2049  // FIXME: change this to 'raw' interface type, so we can used 'interface' type
2050  // for the common case.
2051  bool isObjCObjectType() const; // NSString or typeof(*(id)0)
2052  bool isObjCQualifiedInterfaceType() const; // NSString<foo>
2053  bool isObjCQualifiedIdType() const; // id<foo>
2054  bool isObjCQualifiedClassType() const; // Class<foo>
2055  bool isObjCObjectOrInterfaceType() const;
2056  bool isObjCIdType() const; // id
2057  bool isDecltypeType() const;
2058  /// Was this type written with the special inert-in-ARC __unsafe_unretained
2059  /// qualifier?
2060  ///
2061  /// This approximates the answer to the following question: if this
2062  /// translation unit were compiled in ARC, would this type be qualified
2063  /// with __unsafe_unretained?
2065  return hasAttr(attr::ObjCInertUnsafeUnretained);
2066  }
2067 
2068  /// Whether the type is Objective-C 'id' or a __kindof type of an
2069  /// object type, e.g., __kindof NSView * or __kindof id
2070  /// <NSCopying>.
2071  ///
2072  /// \param bound Will be set to the bound on non-id subtype types,
2073  /// which will be (possibly specialized) Objective-C class type, or
2074  /// null for 'id.
2075  bool isObjCIdOrObjectKindOfType(const ASTContext &ctx,
2076  const ObjCObjectType *&bound) const;
2077 
2078  bool isObjCClassType() const; // Class
2079 
2080  /// Whether the type is Objective-C 'Class' or a __kindof type of an
2081  /// Class type, e.g., __kindof Class <NSCopying>.
2082  ///
2083  /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound
2084  /// here because Objective-C's type system cannot express "a class
2085  /// object for a subclass of NSFoo".
2086  bool isObjCClassOrClassKindOfType() const;
2087 
2088  bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const;
2089  bool isObjCSelType() const; // Class
2090  bool isObjCBuiltinType() const; // 'id' or 'Class'
2091  bool isObjCARCBridgableType() const;
2092  bool isCARCBridgableType() const;
2093  bool isTemplateTypeParmType() const; // C++ template type parameter
2094  bool isNullPtrType() const; // C++11 std::nullptr_t
2095  bool isNothrowT() const; // C++ std::nothrow_t
2096  bool isAlignValT() const; // C++17 std::align_val_t
2097  bool isStdByteType() const; // C++17 std::byte
2098  bool isAtomicType() const; // C11 _Atomic()
2099  bool isUndeducedAutoType() const; // C++11 auto or
2100  // C++14 decltype(auto)
2101 
2102 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2103  bool is##Id##Type() const;
2104 #include "clang/Basic/OpenCLImageTypes.def"
2105 
2106  bool isImageType() const; // Any OpenCL image type
2107 
2108  bool isSamplerT() const; // OpenCL sampler_t
2109  bool isEventT() const; // OpenCL event_t
2110  bool isClkEventT() const; // OpenCL clk_event_t
2111  bool isQueueT() const; // OpenCL queue_t
2112  bool isReserveIDT() const; // OpenCL reserve_id_t
2113 
2114 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
2115  bool is##Id##Type() const;
2116 #include "clang/Basic/OpenCLExtensionTypes.def"
2117  // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension
2118  bool isOCLIntelSubgroupAVCType() const;
2119  bool isOCLExtOpaqueType() const; // Any OpenCL extension type
2120 
2121  bool isPipeType() const; // OpenCL pipe type
2122  bool isOpenCLSpecificType() const; // Any OpenCL specific type
2123 
2124  /// Determines if this type, which must satisfy
2125  /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
2126  /// than implicitly __strong.
2127  bool isObjCARCImplicitlyUnretainedType() const;
2128 
2129  /// Return the implicit lifetime for this type, which must not be dependent.
2130  Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const;
2131 
2142  STK_FixedPoint
2143  };
2144 
2145  /// Given that this is a scalar type, classify it.
2146  ScalarTypeKind getScalarTypeKind() const;
2147 
2148  /// Whether this type is a dependent type, meaning that its definition
2149  /// somehow depends on a template parameter (C++ [temp.dep.type]).
2150  bool isDependentType() const { return TypeBits.Dependent; }
2151 
2152  /// Determine whether this type is an instantiation-dependent type,
2153  /// meaning that the type involves a template parameter (even if the
2154  /// definition does not actually depend on the type substituted for that
2155  /// template parameter).
2157  return TypeBits.InstantiationDependent;
2158  }
2159 
2160  /// Determine whether this type is an undeduced type, meaning that
2161  /// it somehow involves a C++11 'auto' type or similar which has not yet been
2162  /// deduced.
2163  bool isUndeducedType() const;
2164 
2165  /// Whether this type is a variably-modified type (C99 6.7.5).
2166  bool isVariablyModifiedType() const { return TypeBits.VariablyModified; }
2167 
2168  /// Whether this type involves a variable-length array type
2169  /// with a definite size.
2170  bool hasSizedVLAType() const;
2171 
2172  /// Whether this type is or contains a local or unnamed type.
2173  bool hasUnnamedOrLocalType() const;
2174 
2175  bool isOverloadableType() const;
2176 
2177  /// Determine wither this type is a C++ elaborated-type-specifier.
2178  bool isElaboratedTypeSpecifier() const;
2179 
2180  bool canDecayToPointerType() const;
2181 
2182  /// Whether this type is represented natively as a pointer. This includes
2183  /// pointers, references, block pointers, and Objective-C interface,
2184  /// qualified id, and qualified interface types, as well as nullptr_t.
2185  bool hasPointerRepresentation() const;
2186 
2187  /// Whether this type can represent an objective pointer type for the
2188  /// purpose of GC'ability
2189  bool hasObjCPointerRepresentation() const;
2190 
2191  /// Determine whether this type has an integer representation
2192  /// of some sort, e.g., it is an integer type or a vector.
2193  bool hasIntegerRepresentation() const;
2194 
2195  /// Determine whether this type has an signed integer representation
2196  /// of some sort, e.g., it is an signed integer type or a vector.
2197  bool hasSignedIntegerRepresentation() const;
2198 
2199  /// Determine whether this type has an unsigned integer representation
2200  /// of some sort, e.g., it is an unsigned integer type or a vector.
2201  bool hasUnsignedIntegerRepresentation() const;
2202 
2203  /// Determine whether this type has a floating-point representation
2204  /// of some sort, e.g., it is a floating-point type or a vector thereof.
2205  bool hasFloatingRepresentation() const;
2206 
2207  // Type Checking Functions: Check to see if this type is structurally the
2208  // specified type, ignoring typedefs and qualifiers, and return a pointer to
2209  // the best type we can.
2210  const RecordType *getAsStructureType() const;
2211  /// NOTE: getAs*ArrayType are methods on ASTContext.
2212  const RecordType *getAsUnionType() const;
2213  const ComplexType *getAsComplexIntegerType() const; // GCC complex int type.
2214  const ObjCObjectType *getAsObjCInterfaceType() const;
2215 
2216  // The following is a convenience method that returns an ObjCObjectPointerType
2217  // for object declared using an interface.
2218  const ObjCObjectPointerType *getAsObjCInterfacePointerType() const;
2219  const ObjCObjectPointerType *getAsObjCQualifiedIdType() const;
2220  const ObjCObjectPointerType *getAsObjCQualifiedClassType() const;
2221  const ObjCObjectType *getAsObjCQualifiedInterfaceType() const;
2222 
2223  /// Retrieves the CXXRecordDecl that this type refers to, either
2224  /// because the type is a RecordType or because it is the injected-class-name
2225  /// type of a class template or class template partial specialization.
2226  CXXRecordDecl *getAsCXXRecordDecl() const;
2227 
2228  /// Retrieves the RecordDecl this type refers to.
2229  RecordDecl *getAsRecordDecl() const;
2230 
2231  /// Retrieves the TagDecl that this type refers to, either
2232  /// because the type is a TagType or because it is the injected-class-name
2233  /// type of a class template or class template partial specialization.
2234  TagDecl *getAsTagDecl() const;
2235 
2236  /// If this is a pointer or reference to a RecordType, return the
2237  /// CXXRecordDecl that the type refers to.
2238  ///
2239  /// If this is not a pointer or reference, or the type being pointed to does
2240  /// not refer to a CXXRecordDecl, returns NULL.
2241  const CXXRecordDecl *getPointeeCXXRecordDecl() const;
2242 
2243  /// Get the DeducedType whose type will be deduced for a variable with
2244  /// an initializer of this type. This looks through declarators like pointer
2245  /// types, but not through decltype or typedefs.
2246  DeducedType *getContainedDeducedType() const;
2247 
2248  /// Get the AutoType whose type will be deduced for a variable with
2249  /// an initializer of this type. This looks through declarators like pointer
2250  /// types, but not through decltype or typedefs.
2252  return dyn_cast_or_null<AutoType>(getContainedDeducedType());
2253  }
2254 
2255  /// Determine whether this type was written with a leading 'auto'
2256  /// corresponding to a trailing return type (possibly for a nested
2257  /// function type within a pointer to function type or similar).
2258  bool hasAutoForTrailingReturnType() const;
2259 
2260  /// Member-template getAs<specific type>'. Look through sugar for
2261  /// an instance of <specific type>. This scheme will eventually
2262  /// replace the specific getAsXXXX methods above.
2263  ///
2264  /// There are some specializations of this member template listed
2265  /// immediately following this class.
2266  template <typename T> const T *getAs() const;
2267 
2268  /// Member-template getAsAdjusted<specific type>. Look through specific kinds
2269  /// of sugar (parens, attributes, etc) for an instance of <specific type>.
2270  /// This is used when you need to walk over sugar nodes that represent some
2271  /// kind of type adjustment from a type that was written as a <specific type>
2272  /// to another type that is still canonically a <specific type>.
2273  template <typename T> const T *getAsAdjusted() const;
2274 
2275  /// A variant of getAs<> for array types which silently discards
2276  /// qualifiers from the outermost type.
2277  const ArrayType *getAsArrayTypeUnsafe() const;
2278 
2279  /// Member-template castAs<specific type>. Look through sugar for
2280  /// the underlying instance of <specific type>.
2281  ///
2282  /// This method has the same relationship to getAs<T> as cast<T> has
2283  /// to dyn_cast<T>; which is to say, the underlying type *must*
2284  /// have the intended type, and this method will never return null.
2285  template <typename T> const T *castAs() const;
2286 
2287  /// A variant of castAs<> for array type which silently discards
2288  /// qualifiers from the outermost type.
2289  const ArrayType *castAsArrayTypeUnsafe() const;
2290 
2291  /// Determine whether this type had the specified attribute applied to it
2292  /// (looking through top-level type sugar).
2293  bool hasAttr(attr::Kind AK) const;
2294 
2295  /// Get the base element type of this type, potentially discarding type
2296  /// qualifiers. This should never be used when type qualifiers
2297  /// are meaningful.
2298  const Type *getBaseElementTypeUnsafe() const;
2299 
2300  /// If this is an array type, return the element type of the array,
2301  /// potentially with type qualifiers missing.
2302  /// This should never be used when type qualifiers are meaningful.
2303  const Type *getArrayElementTypeNoTypeQual() const;
2304 
2305  /// If this is a pointer type, return the pointee type.
2306  /// If this is an array type, return the array element type.
2307  /// This should never be used when type qualifiers are meaningful.
2308  const Type *getPointeeOrArrayElementType() const;
2309 
2310  /// If this is a pointer, ObjC object pointer, or block
2311  /// pointer, this returns the respective pointee.
2312  QualType getPointeeType() const;
2313 
2314  /// Return the specified type with any "sugar" removed from the type,
2315  /// removing any typedefs, typeofs, etc., as well as any qualifiers.
2316  const Type *getUnqualifiedDesugaredType() const;
2317 
2318  /// More type predicates useful for type checking/promotion
2319  bool isPromotableIntegerType() const; // C99 6.3.1.1p2
2320 
2321  /// Return true if this is an integer type that is
2322  /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
2323  /// or an enum decl which has a signed representation.
2324  bool isSignedIntegerType() const;
2325 
2326  /// Return true if this is an integer type that is
2327  /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool],
2328  /// or an enum decl which has an unsigned representation.
2329  bool isUnsignedIntegerType() const;
2330 
2331  /// Determines whether this is an integer type that is signed or an
2332  /// enumeration types whose underlying type is a signed integer type.
2333  bool isSignedIntegerOrEnumerationType() const;
2334 
2335  /// Determines whether this is an integer type that is unsigned or an
2336  /// enumeration types whose underlying type is a unsigned integer type.
2337  bool isUnsignedIntegerOrEnumerationType() const;
2338 
2339  /// Return true if this is a fixed point type according to
2340  /// ISO/IEC JTC1 SC22 WG14 N1169.
2341  bool isFixedPointType() const;
2342 
2343  /// Return true if this is a fixed point or integer type.
2344  bool isFixedPointOrIntegerType() const;
2345 
2346  /// Return true if this is a saturated fixed point type according to
2347  /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
2348  bool isSaturatedFixedPointType() const;
2349 
2350  /// Return true if this is a saturated fixed point type according to
2351  /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
2352  bool isUnsaturatedFixedPointType() const;
2353 
2354  /// Return true if this is a fixed point type that is signed according
2355  /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
2356  bool isSignedFixedPointType() const;
2357 
2358  /// Return true if this is a fixed point type that is unsigned according
2359  /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
2360  bool isUnsignedFixedPointType() const;
2361 
2362  /// Return true if this is not a variable sized type,
2363  /// according to the rules of C99 6.7.5p3. It is not legal to call this on
2364  /// incomplete types.
2365  bool isConstantSizeType() const;
2366 
2367  /// Returns true if this type can be represented by some
2368  /// set of type specifiers.
2369  bool isSpecifierType() const;
2370 
2371  /// Determine the linkage of this type.
2372  Linkage getLinkage() const;
2373 
2374  /// Determine the visibility of this type.
2376  return getLinkageAndVisibility().getVisibility();
2377  }
2378 
2379  /// Return true if the visibility was explicitly set is the code.
2380  bool isVisibilityExplicit() const {
2381  return getLinkageAndVisibility().isVisibilityExplicit();
2382  }
2383 
2384  /// Determine the linkage and visibility of this type.
2385  LinkageInfo getLinkageAndVisibility() const;
2386 
2387  /// True if the computed linkage is valid. Used for consistency
2388  /// checking. Should always return true.
2389  bool isLinkageValid() const;
2390 
2391  /// Determine the nullability of the given type.
2392  ///
2393  /// Note that nullability is only captured as sugar within the type
2394  /// system, not as part of the canonical type, so nullability will
2395  /// be lost by canonicalization and desugaring.
2396  Optional<NullabilityKind> getNullability(const ASTContext &context) const;
2397 
2398  /// Determine whether the given type can have a nullability
2399  /// specifier applied to it, i.e., if it is any kind of pointer type.
2400  ///
2401  /// \param ResultIfUnknown The value to return if we don't yet know whether
2402  /// this type can have nullability because it is dependent.
2403  bool canHaveNullability(bool ResultIfUnknown = true) const;
2404 
2405  /// Retrieve the set of substitutions required when accessing a member
2406  /// of the Objective-C receiver type that is declared in the given context.
2407  ///
2408  /// \c *this is the type of the object we're operating on, e.g., the
2409  /// receiver for a message send or the base of a property access, and is
2410  /// expected to be of some object or object pointer type.
2411  ///
2412  /// \param dc The declaration context for which we are building up a
2413  /// substitution mapping, which should be an Objective-C class, extension,
2414  /// category, or method within.
2415  ///
2416  /// \returns an array of type arguments that can be substituted for
2417  /// the type parameters of the given declaration context in any type described
2418  /// within that context, or an empty optional to indicate that no
2419  /// substitution is required.
2421  getObjCSubstitutions(const DeclContext *dc) const;
2422 
2423  /// Determines if this is an ObjC interface type that may accept type
2424  /// parameters.
2425  bool acceptsObjCTypeParams() const;
2426 
2427  const char *getTypeClassName() const;
2428 
2430  return CanonicalType;
2431  }
2432 
2433  CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h
2434  void dump() const;
2435  void dump(llvm::raw_ostream &OS) const;
2436 };
2437 
2438 /// This will check for a TypedefType by removing any existing sugar
2439 /// until it reaches a TypedefType or a non-sugared type.
2440 template <> const TypedefType *Type::getAs() const;
2441 
2442 /// This will check for a TemplateSpecializationType by removing any
2443 /// existing sugar until it reaches a TemplateSpecializationType or a
2444 /// non-sugared type.
2445 template <> const TemplateSpecializationType *Type::getAs() const;
2446 
2447 /// This will check for an AttributedType by removing any existing sugar
2448 /// until it reaches an AttributedType or a non-sugared type.
2449 template <> const AttributedType *Type::getAs() const;
2450 
2451 // We can do canonical leaf types faster, because we don't have to
2452 // worry about preserving child type decoration.
2453 #define TYPE(Class, Base)
2454 #define LEAF_TYPE(Class) \
2455 template <> inline const Class##Type *Type::getAs() const { \
2456  return dyn_cast<Class##Type>(CanonicalType); \
2457 } \
2458 template <> inline const Class##Type *Type::castAs() const { \
2459  return cast<Class##Type>(CanonicalType); \
2460 }
2461 #include "clang/AST/TypeNodes.inc"
2462 
2463 /// This class is used for builtin types like 'int'. Builtin
2464 /// types are always canonical and have a literal name field.
2465 class BuiltinType : public Type {
2466 public:
2467  enum Kind {
2468 // OpenCL image types
2469 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id,
2470 #include "clang/Basic/OpenCLImageTypes.def"
2471 // OpenCL extension types
2472 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id,
2473 #include "clang/Basic/OpenCLExtensionTypes.def"
2474 // SVE Types
2475 #define SVE_TYPE(Name, Id, SingletonId) Id,
2476 #include "clang/Basic/AArch64SVEACLETypes.def"
2477 // All other builtin types
2478 #define BUILTIN_TYPE(Id, SingletonId) Id,
2479 #define LAST_BUILTIN_TYPE(Id) LastKind = Id
2480 #include "clang/AST/BuiltinTypes.def"
2481  };
2482 
2483 private:
2484  friend class ASTContext; // ASTContext creates these.
2485 
2486  BuiltinType(Kind K)
2487  : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent),
2488  /*InstantiationDependent=*/(K == Dependent),
2489  /*VariablyModified=*/false,
2490  /*Unexpanded parameter pack=*/false) {
2491  BuiltinTypeBits.Kind = K;
2492  }
2493 
2494 public:
2495  Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); }
2496  StringRef getName(const PrintingPolicy &Policy) const;
2497 
2498  const char *getNameAsCString(const PrintingPolicy &Policy) const {
2499  // The StringRef is null-terminated.
2500  StringRef str = getName(Policy);
2501  assert(!str.empty() && str.data()[str.size()] == '\0');
2502  return str.data();
2503  }
2504 
2505  bool isSugared() const { return false; }
2506  QualType desugar() const { return QualType(this, 0); }
2507 
2508  bool isInteger() const {
2509  return getKind() >= Bool && getKind() <= Int128;
2510  }
2511 
2512  bool isSignedInteger() const {
2513  return getKind() >= Char_S && getKind() <= Int128;
2514  }
2515 
2516  bool isUnsignedInteger() const {
2517  return getKind() >= Bool && getKind() <= UInt128;
2518  }
2519 
2520  bool isFloatingPoint() const {
2521  return getKind() >= Half && getKind() <= Float128;
2522  }
2523 
2524  /// Determines whether the given kind corresponds to a placeholder type.
2525  static bool isPlaceholderTypeKind(Kind K) {
2526  return K >= Overload;
2527  }
2528 
2529  /// Determines whether this type is a placeholder type, i.e. a type
2530  /// which cannot appear in arbitrary positions in a fully-formed
2531  /// expression.
2532  bool isPlaceholderType() const {
2533  return isPlaceholderTypeKind(getKind());
2534  }
2535 
2536  /// Determines whether this type is a placeholder type other than
2537  /// Overload. Most placeholder types require only syntactic
2538  /// information about their context in order to be resolved (e.g.
2539  /// whether it is a call expression), which means they can (and
2540  /// should) be resolved in an earlier "phase" of analysis.
2541  /// Overload expressions sometimes pick up further information
2542  /// from their context, like whether the context expects a
2543  /// specific function-pointer type, and so frequently need
2544  /// special treatment.
2546  return getKind() > Overload;
2547  }
2548 
2549  static bool classof(const Type *T) { return T->getTypeClass() == Builtin; }
2550 };
2551 
2552 /// Complex values, per C99 6.2.5p11. This supports the C99 complex
2553 /// types (_Complex float etc) as well as the GCC integer complex extensions.
2554 class ComplexType : public Type, public llvm::FoldingSetNode {
2555  friend class ASTContext; // ASTContext creates these.
2556 
2557  QualType ElementType;
2558 
2559  ComplexType(QualType Element, QualType CanonicalPtr)
2560  : Type(Complex, CanonicalPtr, Element->isDependentType(),
2561  Element->isInstantiationDependentType(),
2562  Element->isVariablyModifiedType(),
2563  Element->containsUnexpandedParameterPack()),
2564  ElementType(Element) {}
2565 
2566 public:
2567  QualType getElementType() const { return ElementType; }
2568 
2569  bool isSugared() const { return false; }
2570  QualType desugar() const { return QualType(this, 0); }
2571 
2572  void Profile(llvm::FoldingSetNodeID &ID) {
2573  Profile(ID, getElementType());
2574  }
2575 
2576  static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) {
2577  ID.AddPointer(Element.getAsOpaquePtr());
2578  }
2579 
2580  static bool classof(const Type *T) { return T->getTypeClass() == Complex; }
2581 };
2582 
2583 /// Sugar for parentheses used when specifying types.
2584 class ParenType : public Type, public llvm::FoldingSetNode {
2585  friend class ASTContext; // ASTContext creates these.
2586 
2587  QualType Inner;
2588 
2589  ParenType(QualType InnerType, QualType CanonType)
2590  : Type(Paren, CanonType, InnerType->isDependentType(),
2591  InnerType->isInstantiationDependentType(),
2592  InnerType->isVariablyModifiedType(),
2593  InnerType->containsUnexpandedParameterPack()),
2594  Inner(InnerType) {}
2595 
2596 public:
2597  QualType getInnerType() const { return Inner; }
2598 
2599  bool isSugared() const { return true; }
2600  QualType desugar() const { return getInnerType(); }
2601 
2602  void Profile(llvm::FoldingSetNodeID &ID) {
2603  Profile(ID, getInnerType());
2604  }
2605 
2606  static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) {
2607  Inner.Profile(ID);
2608  }
2609 
2610  static bool classof(const Type *T) { return T->getTypeClass() == Paren; }
2611 };
2612 
2613 /// PointerType - C99 6.7.5.1 - Pointer Declarators.
2614 class PointerType : public Type, public llvm::FoldingSetNode {
2615  friend class ASTContext; // ASTContext creates these.
2616 
2617  QualType PointeeType;
2618 
2619  PointerType(QualType Pointee, QualType CanonicalPtr)
2620  : Type(Pointer, CanonicalPtr, Pointee->isDependentType(),
2621  Pointee->isInstantiationDependentType(),
2622  Pointee->isVariablyModifiedType(),
2623  Pointee->containsUnexpandedParameterPack()),
2624  PointeeType(Pointee) {}
2625 
2626 public:
2627  QualType getPointeeType() const { return PointeeType; }
2628 
2629  /// Returns true if address spaces of pointers overlap.
2630  /// OpenCL v2.0 defines conversion rules for pointers to different
2631  /// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping
2632  /// address spaces.
2633  /// CL1.1 or CL1.2:
2634  /// address spaces overlap iff they are they same.
2635  /// CL2.0 adds:
2636  /// __generic overlaps with any address space except for __constant.
2637  bool isAddressSpaceOverlapping(const PointerType &other) const {
2638  Qualifiers thisQuals = PointeeType.getQualifiers();
2639  Qualifiers otherQuals = other.getPointeeType().getQualifiers();
2640  // Address spaces overlap if at least one of them is a superset of another
2641  return thisQuals.isAddressSpaceSupersetOf(otherQuals) ||
2642  otherQuals.isAddressSpaceSupersetOf(thisQuals);
2643  }
2644 
2645  bool isSugared() const { return false; }
2646  QualType desugar() const { return QualType(this, 0); }
2647 
2648  void Profile(llvm::FoldingSetNodeID &ID) {
2649  Profile(ID, getPointeeType());
2650  }
2651 
2652  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
2653  ID.AddPointer(Pointee.getAsOpaquePtr());
2654  }
2655 
2656  static bool classof(const Type *T) { return T->getTypeClass() == Pointer; }
2657 };
2658 
2659 /// Represents a type which was implicitly adjusted by the semantic
2660 /// engine for arbitrary reasons. For example, array and function types can
2661 /// decay, and function types can have their calling conventions adjusted.
2662 class AdjustedType : public Type, public llvm::FoldingSetNode {
2663  QualType OriginalTy;
2664  QualType AdjustedTy;
2665 
2666 protected:
2667  friend class ASTContext; // ASTContext creates these.
2668 
2669  AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy,
2670  QualType CanonicalPtr)
2671  : Type(TC, CanonicalPtr, OriginalTy->isDependentType(),
2672  OriginalTy->isInstantiationDependentType(),
2673  OriginalTy->isVariablyModifiedType(),
2674  OriginalTy->containsUnexpandedParameterPack()),
2675  OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {}
2676 
2677 public:
2678  QualType getOriginalType() const { return OriginalTy; }
2679  QualType getAdjustedType() const { return AdjustedTy; }
2680 
2681  bool isSugared() const { return true; }
2682  QualType desugar() const { return AdjustedTy; }
2683 
2684  void Profile(llvm::FoldingSetNodeID &ID) {
2685  Profile(ID, OriginalTy, AdjustedTy);
2686  }
2687 
2688  static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) {
2689  ID.AddPointer(Orig.getAsOpaquePtr());
2690  ID.AddPointer(New.getAsOpaquePtr());
2691  }
2692 
2693  static bool classof(const Type *T) {
2694  return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed;
2695  }
2696 };
2697 
2698 /// Represents a pointer type decayed from an array or function type.
2699 class DecayedType : public AdjustedType {
2700  friend class ASTContext; // ASTContext creates these.
2701 
2702  inline
2703  DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical);
2704 
2705 public:
2706  QualType getDecayedType() const { return getAdjustedType(); }
2707 
2708  inline QualType getPointeeType() const;
2709 
2710  static bool classof(const Type *T) { return T->getTypeClass() == Decayed; }
2711 };
2712 
2713 /// Pointer to a block type.
2714 /// This type is to represent types syntactically represented as
2715 /// "void (^)(int)", etc. Pointee is required to always be a function type.
2716 class BlockPointerType : public Type, public llvm::FoldingSetNode {
2717  friend class ASTContext; // ASTContext creates these.
2718 
2719  // Block is some kind of pointer type
2720  QualType PointeeType;
2721 
2722  BlockPointerType(QualType Pointee, QualType CanonicalCls)
2723  : Type(BlockPointer, CanonicalCls, Pointee->isDependentType(),
2724  Pointee->isInstantiationDependentType(),
2725  Pointee->isVariablyModifiedType(),
2726  Pointee->containsUnexpandedParameterPack()),
2727  PointeeType(Pointee) {}
2728 
2729 public:
2730  // Get the pointee type. Pointee is required to always be a function type.
2731  QualType getPointeeType() const { return PointeeType; }
2732 
2733  bool isSugared() const { return false; }
2734  QualType desugar() const { return QualType(this, 0); }
2735 
2736  void Profile(llvm::FoldingSetNodeID &ID) {
2737  Profile(ID, getPointeeType());
2738  }
2739 
2740  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
2741  ID.AddPointer(Pointee.getAsOpaquePtr());
2742  }
2743 
2744  static bool classof(const Type *T) {
2745  return T->getTypeClass() == BlockPointer;
2746  }
2747 };
2748 
2749 /// Base for LValueReferenceType and RValueReferenceType
2750 class ReferenceType : public Type, public llvm::FoldingSetNode {
2751  QualType PointeeType;
2752 
2753 protected:
2754  ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef,
2755  bool SpelledAsLValue)
2756  : Type(tc, CanonicalRef, Referencee->isDependentType(),
2757  Referencee->isInstantiationDependentType(),
2758  Referencee->isVariablyModifiedType(),
2759  Referencee->containsUnexpandedParameterPack()),
2760  PointeeType(Referencee) {
2761  ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue;
2762  ReferenceTypeBits.InnerRef = Referencee->isReferenceType();
2763  }
2764 
2765 public:
2766  bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; }
2767  bool isInnerRef() const { return ReferenceTypeBits.InnerRef; }
2768 
2769  QualType getPointeeTypeAsWritten() const { return PointeeType; }
2770 
2772  // FIXME: this might strip inner qualifiers; okay?
2773  const ReferenceType *T = this;
2774  while (T->isInnerRef())
2775  T = T->PointeeType->castAs<ReferenceType>();
2776  return T->PointeeType;
2777  }
2778 
2779  void Profile(llvm::FoldingSetNodeID &ID) {
2780  Profile(ID, PointeeType, isSpelledAsLValue());
2781  }
2782 
2783  static void Profile(llvm::FoldingSetNodeID &ID,
2784  QualType Referencee,
2785  bool SpelledAsLValue) {
2786  ID.AddPointer(Referencee.getAsOpaquePtr());
2787  ID.AddBoolean(SpelledAsLValue);
2788  }
2789 
2790  static bool classof(const Type *T) {
2791  return T->getTypeClass() == LValueReference ||
2792  T->getTypeClass() == RValueReference;
2793  }
2794 };
2795 
2796 /// An lvalue reference type, per C++11 [dcl.ref].
2798  friend class ASTContext; // ASTContext creates these
2799 
2800  LValueReferenceType(QualType Referencee, QualType CanonicalRef,
2801  bool SpelledAsLValue)
2802  : ReferenceType(LValueReference, Referencee, CanonicalRef,
2803  SpelledAsLValue) {}
2804 
2805 public:
2806  bool isSugared() const { return false; }
2807  QualType desugar() const { return QualType(this, 0); }
2808 
2809  static bool classof(const Type *T) {
2810  return T->getTypeClass() == LValueReference;
2811  }
2812 };
2813 
2814 /// An rvalue reference type, per C++11 [dcl.ref].
2816  friend class ASTContext; // ASTContext creates these
2817 
2818  RValueReferenceType(QualType Referencee, QualType CanonicalRef)
2819  : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {}
2820 
2821 public:
2822  bool isSugared() const { return false; }
2823  QualType desugar() const { return QualType(this, 0); }
2824 
2825  static bool classof(const Type *T) {
2826  return T->getTypeClass() == RValueReference;
2827  }
2828 };
2829 
2830 /// A pointer to member type per C++ 8.3.3 - Pointers to members.
2831 ///
2832 /// This includes both pointers to data members and pointer to member functions.
2833 class MemberPointerType : public Type, public llvm::FoldingSetNode {
2834  friend class ASTContext; // ASTContext creates these.
2835 
2836  QualType PointeeType;
2837 
2838  /// The class of which the pointee is a member. Must ultimately be a
2839  /// RecordType, but could be a typedef or a template parameter too.
2840  const Type *Class;
2841 
2842  MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr)
2843  : Type(MemberPointer, CanonicalPtr,
2844  Cls->isDependentType() || Pointee->isDependentType(),
2845  (Cls->isInstantiationDependentType() ||
2846  Pointee->isInstantiationDependentType()),
2847  Pointee->isVariablyModifiedType(),
2848  (Cls->containsUnexpandedParameterPack() ||
2849  Pointee->containsUnexpandedParameterPack())),
2850  PointeeType(Pointee), Class(Cls) {}
2851 
2852 public:
2853  QualType getPointeeType() const { return PointeeType; }
2854 
2855  /// Returns true if the member type (i.e. the pointee type) is a
2856  /// function type rather than a data-member type.
2858  return PointeeType->isFunctionProtoType();
2859  }
2860 
2861  /// Returns true if the member type (i.e. the pointee type) is a
2862  /// data type rather than a function type.
2863  bool isMemberDataPointer() const {
2864  return !PointeeType->isFunctionProtoType();
2865  }
2866 
2867  const Type *getClass() const { return Class; }
2868  CXXRecordDecl *getMostRecentCXXRecordDecl() const;
2869 
2870  bool isSugared() const { return false; }
2871  QualType desugar() const { return QualType(this, 0); }
2872 
2873  void Profile(llvm::FoldingSetNodeID &ID) {
2874  Profile(ID, getPointeeType(), getClass());
2875  }
2876 
2877  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee,
2878  const Type *Class) {
2879  ID.AddPointer(Pointee.getAsOpaquePtr());
2880  ID.AddPointer(Class);
2881  }
2882 
2883  static bool classof(const Type *T) {
2884  return T->getTypeClass() == MemberPointer;
2885  }
2886 };
2887 
2888 /// Represents an array type, per C99 6.7.5.2 - Array Declarators.
2889 class ArrayType : public Type, public llvm::FoldingSetNode {
2890 public:
2891  /// Capture whether this is a normal array (e.g. int X[4])
2892  /// an array with a static size (e.g. int X[static 4]), or an array
2893  /// with a star size (e.g. int X[*]).
2894  /// 'static' is only allowed on function parameters.
2897  };
2898 
2899 private:
2900  /// The element type of the array.
2901  QualType ElementType;
2902 
2903 protected:
2904  friend class ASTContext; // ASTContext creates these.
2905 
2907  unsigned tq, const Expr *sz = nullptr);
2908 
2909 public:
2910  QualType getElementType() const { return ElementType; }
2911 
2913  return ArraySizeModifier(ArrayTypeBits.SizeModifier);
2914  }
2915 
2917  return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers());
2918  }
2919 
2920  unsigned getIndexTypeCVRQualifiers() const {
2921  return ArrayTypeBits.IndexTypeQuals;
2922  }
2923 
2924  static bool classof(const Type *T) {
2925  return T->getTypeClass() == ConstantArray ||
2926  T->getTypeClass() == VariableArray ||
2927  T->getTypeClass() == IncompleteArray ||
2928  T->getTypeClass() == DependentSizedArray;
2929  }
2930 };
2931 
2932 /// Represents the canonical version of C arrays with a specified constant size.
2933 /// For example, the canonical type for 'int A[4 + 4*100]' is a
2934 /// ConstantArrayType where the element type is 'int' and the size is 404.
2936  : public ArrayType,
2937  private llvm::TrailingObjects<ConstantArrayType, const Expr *> {
2938  friend class ASTContext; // ASTContext creates these.
2939  friend TrailingObjects;
2940 
2941  llvm::APInt Size; // Allows us to unique the type.
2942 
2943  ConstantArrayType(QualType et, QualType can, const llvm::APInt &size,
2944  const Expr *sz, ArraySizeModifier sm, unsigned tq)
2945  : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) {
2946  ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr;
2947  if (ConstantArrayTypeBits.HasStoredSizeExpr) {
2948  assert(!can.isNull() && "canonical constant array should not have size");
2949  *getTrailingObjects<const Expr*>() = sz;
2950  }
2951  }
2952 
2953  unsigned numTrailingObjects(OverloadToken<const Expr*>) const {
2954  return ConstantArrayTypeBits.HasStoredSizeExpr;
2955  }
2956 
2957 public:
2958  const llvm::APInt &getSize() const { return Size; }
2959  const Expr *getSizeExpr() const {
2960  return ConstantArrayTypeBits.HasStoredSizeExpr
2961  ? *getTrailingObjects<const Expr *>()
2962  : nullptr;
2963  }
2964  bool isSugared() const { return false; }
2965  QualType desugar() const { return QualType(this, 0); }
2966 
2967  /// Determine the number of bits required to address a member of
2968  // an array with the given element type and number of elements.
2969  static unsigned getNumAddressingBits(const ASTContext &Context,
2970  QualType ElementType,
2971  const llvm::APInt &NumElements);
2972 
2973  /// Determine the maximum number of active bits that an array's size
2974  /// can require, which limits the maximum size of the array.
2975  static unsigned getMaxSizeBits(const ASTContext &Context);
2976 
2977  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
2978  Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(),
2979  getSizeModifier(), getIndexTypeCVRQualifiers());
2980  }
2981 
2982  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx,
2983  QualType ET, const llvm::APInt &ArraySize,
2984  const Expr *SizeExpr, ArraySizeModifier SizeMod,
2985  unsigned TypeQuals);
2986 
2987  static bool classof(const Type *T) {
2988  return T->getTypeClass() == ConstantArray;
2989  }
2990 };
2991 
2992 /// Represents a C array with an unspecified size. For example 'int A[]' has
2993 /// an IncompleteArrayType where the element type is 'int' and the size is
2994 /// unspecified.
2996  friend class ASTContext; // ASTContext creates these.
2997 
2999  ArraySizeModifier sm, unsigned tq)
3000  : ArrayType(IncompleteArray, et, can, sm, tq) {}
3001 
3002 public:
3003  friend class StmtIteratorBase;
3004 
3005  bool isSugared() const { return false; }
3006  QualType desugar() const { return QualType(this, 0); }
3007 
3008  static bool classof(const Type *T) {
3009  return T->getTypeClass() == IncompleteArray;
3010  }
3011 
3012  void Profile(llvm::FoldingSetNodeID &ID) {
3013  Profile(ID, getElementType(), getSizeModifier(),
3014  getIndexTypeCVRQualifiers());
3015  }
3016 
3017  static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
3018  ArraySizeModifier SizeMod, unsigned TypeQuals) {
3019  ID.AddPointer(ET.getAsOpaquePtr());
3020  ID.AddInteger(SizeMod);
3021  ID.AddInteger(TypeQuals);
3022  }
3023 };
3024 
3025 /// Represents a C array with a specified size that is not an
3026 /// integer-constant-expression. For example, 'int s[x+foo()]'.
3027 /// Since the size expression is an arbitrary expression, we store it as such.
3028 ///
3029 /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and
3030 /// should not be: two lexically equivalent variable array types could mean
3031 /// different things, for example, these variables do not have the same type
3032 /// dynamically:
3033 ///
3034 /// void foo(int x) {
3035 /// int Y[x];
3036 /// ++x;
3037 /// int Z[x];
3038 /// }
3040  friend class ASTContext; // ASTContext creates these.
3041 
3042  /// An assignment-expression. VLA's are only permitted within
3043  /// a function block.
3044  Stmt *SizeExpr;
3045 
3046  /// The range spanned by the left and right array brackets.
3047  SourceRange Brackets;
3048 
3050  ArraySizeModifier sm, unsigned tq,
3051  SourceRange brackets)
3052  : ArrayType(VariableArray, et, can, sm, tq, e),
3053  SizeExpr((Stmt*) e), Brackets(brackets) {}
3054 
3055 public:
3056  friend class StmtIteratorBase;
3057 
3058  Expr *getSizeExpr() const {
3059  // We use C-style casts instead of cast<> here because we do not wish
3060  // to have a dependency of Type.h on Stmt.h/Expr.h.
3061  return (Expr*) SizeExpr;
3062  }
3063 
3064  SourceRange getBracketsRange() const { return Brackets; }
3065  SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
3066  SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }
3067 
3068  bool isSugared() const { return false; }
3069  QualType desugar() const { return QualType(this, 0); }
3070 
3071  static bool classof(const Type *T) {
3072  return T->getTypeClass() == VariableArray;
3073  }
3074 
3075  void Profile(llvm::FoldingSetNodeID &ID) {
3076  llvm_unreachable("Cannot unique VariableArrayTypes.");
3077  }
3078 };
3079 
3080 /// Represents an array type in C++ whose size is a value-dependent expression.
3081 ///
3082 /// For example:
3083 /// \code
3084 /// template<typename T, int Size>
3085 /// class array {
3086 /// T data[Size];
3087 /// };
3088 /// \endcode
3089 ///
3090 /// For these types, we won't actually know what the array bound is
3091 /// until template instantiation occurs, at which point this will
3092 /// become either a ConstantArrayType or a VariableArrayType.
3094  friend class ASTContext; // ASTContext creates these.
3095 
3096  const ASTContext &Context;
3097 
3098  /// An assignment expression that will instantiate to the
3099  /// size of the array.
3100  ///
3101  /// The expression itself might be null, in which case the array
3102  /// type will have its size deduced from an initializer.
3103  Stmt *SizeExpr;
3104 
3105  /// The range spanned by the left and right array brackets.
3106  SourceRange Brackets;
3107 
3108  DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can,
3109  Expr *e, ArraySizeModifier sm, unsigned tq,
3110  SourceRange brackets);
3111 
3112 public:
3113  friend class StmtIteratorBase;
3114 
3115  Expr *getSizeExpr() const {
3116  // We use C-style casts instead of cast<> here because we do not wish
3117  // to have a dependency of Type.h on Stmt.h/Expr.h.
3118  return (Expr*) SizeExpr;
3119  }
3120 
3121  SourceRange getBracketsRange() const { return Brackets; }
3122  SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
3123  SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }
3124 
3125  bool isSugared() const { return false; }
3126  QualType desugar() const { return QualType(this, 0); }
3127 
3128  static bool classof(const Type *T) {
3129  return T->getTypeClass() == DependentSizedArray;
3130  }
3131 
3132  void Profile(llvm::FoldingSetNodeID &ID) {
3133  Profile(ID, Context, getElementType(),
3134  getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr());
3135  }
3136 
3137  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3138  QualType ET, ArraySizeModifier SizeMod,
3139  unsigned TypeQuals, Expr *E);
3140 };
3141 
3142 /// Represents an extended address space qualifier where the input address space
3143 /// value is dependent. Non-dependent address spaces are not represented with a
3144 /// special Type subclass; they are stored on an ExtQuals node as part of a QualType.
3145 ///
3146 /// For example:
3147 /// \code
3148 /// template<typename T, int AddrSpace>
3149 /// class AddressSpace {
3150 /// typedef T __attribute__((address_space(AddrSpace))) type;
3151 /// }
3152 /// \endcode
3153 class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode {
3154  friend class ASTContext;
3155 
3156  const ASTContext &Context;
3157  Expr *AddrSpaceExpr;
3158  QualType PointeeType;
3159  SourceLocation loc;
3160 
3161  DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType,
3162  QualType can, Expr *AddrSpaceExpr,
3163  SourceLocation loc);
3164 
3165 public:
3166  Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; }
3167  QualType getPointeeType() const { return PointeeType; }
3168  SourceLocation getAttributeLoc() const { return loc; }
3169 
3170  bool isSugared() const { return false; }
3171  QualType desugar() const { return QualType(this, 0); }
3172 
3173  static bool classof(const Type *T) {
3174  return T->getTypeClass() == DependentAddressSpace;
3175  }
3176 
3177  void Profile(llvm::FoldingSetNodeID &ID) {
3178  Profile(ID, Context, getPointeeType(), getAddrSpaceExpr());
3179  }
3180 
3181  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3182  QualType PointeeType, Expr *AddrSpaceExpr);
3183 };
3184 
3185 /// Represents an extended vector type where either the type or size is
3186 /// dependent.
3187 ///
3188 /// For example:
3189 /// \code
3190 /// template<typename T, int Size>
3191 /// class vector {
3192 /// typedef T __attribute__((ext_vector_type(Size))) type;
3193 /// }
3194 /// \endcode
3195 class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode {
3196  friend class ASTContext;
3197 
3198  const ASTContext &Context;
3199  Expr *SizeExpr;
3200 
3201  /// The element type of the array.
3202  QualType ElementType;
3203 
3204  SourceLocation loc;
3205 
3206  DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType,
3207  QualType can, Expr *SizeExpr, SourceLocation loc);
3208 
3209 public:
3210  Expr *getSizeExpr() const { return SizeExpr; }
3211  QualType getElementType() const { return ElementType; }
3212  SourceLocation getAttributeLoc() const { return loc; }
3213 
3214  bool isSugared() const { return false; }
3215  QualType desugar() const { return QualType(this, 0); }
3216 
3217  static bool classof(const Type *T) {
3218  return T->getTypeClass() == DependentSizedExtVector;
3219  }
3220 
3221  void Profile(llvm::FoldingSetNodeID &ID) {
3222  Profile(ID, Context, getElementType(), getSizeExpr());
3223  }
3224 
3225  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3226  QualType ElementType, Expr *SizeExpr);
3227 };
3228 
3229 
3230 /// Represents a GCC generic vector type. This type is created using
3231 /// __attribute__((vector_size(n)), where "n" specifies the vector size in
3232 /// bytes; or from an Altivec __vector or vector declaration.
3233 /// Since the constructor takes the number of vector elements, the
3234 /// client is responsible for converting the size into the number of elements.
3235 class VectorType : public Type, public llvm::FoldingSetNode {
3236 public:
3237  enum VectorKind {
3238  /// not a target-specific vector type
3240 
3241  /// is AltiVec vector
3243 
3244  /// is AltiVec 'vector Pixel'
3246 
3247  /// is AltiVec 'vector bool ...'
3249 
3250  /// is ARM Neon vector
3252 
3253  /// is ARM Neon polynomial vector
3254  NeonPolyVector
3255  };
3256 
3257 protected:
3258  friend class ASTContext; // ASTContext creates these.
3259 
3260  /// The element type of the vector.
3262 
3263  VectorType(QualType vecType, unsigned nElements, QualType canonType,
3264  VectorKind vecKind);
3265 
3266  VectorType(TypeClass tc, QualType vecType, unsigned nElements,
3267  QualType canonType, VectorKind vecKind);
3268 
3269 public:
3270  QualType getElementType() const { return ElementType; }
3271  unsigned getNumElements() const { return VectorTypeBits.NumElements; }
3272 
3273  static bool isVectorSizeTooLarge(unsigned NumElements) {
3274  return NumElements > VectorTypeBitfields::MaxNumElements;
3275  }
3276 
3277  bool isSugared() const { return false; }
3278  QualType desugar() const { return QualType(this, 0); }
3279 
3281  return VectorKind(VectorTypeBits.VecKind);
3282  }
3283 
3284  void Profile(llvm::FoldingSetNodeID &ID) {
3285  Profile(ID, getElementType(), getNumElements(),
3286  getTypeClass(), getVectorKind());
3287  }
3288 
3289  static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
3290  unsigned NumElements, TypeClass TypeClass,
3291  VectorKind VecKind) {
3292  ID.AddPointer(ElementType.getAsOpaquePtr());
3293  ID.AddInteger(NumElements);
3294  ID.AddInteger(TypeClass);
3295  ID.AddInteger(VecKind);
3296  }
3297 
3298  static bool classof(const Type *T) {
3299  return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector;
3300  }
3301 };
3302 
3303 /// Represents a vector type where either the type or size is dependent.
3304 ////
3305 /// For example:
3306 /// \code
3307 /// template<typename T, int Size>
3308 /// class vector {
3309 /// typedef T __attribute__((vector_size(Size))) type;
3310 /// }
3311 /// \endcode
3312 class DependentVectorType : public Type, public llvm::FoldingSetNode {
3313  friend class ASTContext;
3314 
3315  const ASTContext &Context;
3316  QualType ElementType;
3317  Expr *SizeExpr;
3318  SourceLocation Loc;
3319 
3320  DependentVectorType(const ASTContext &Context, QualType ElementType,
3321  QualType CanonType, Expr *SizeExpr,
3322  SourceLocation Loc, VectorType::VectorKind vecKind);
3323 
3324 public:
3325  Expr *getSizeExpr() const { return SizeExpr; }
3326  QualType getElementType() const { return ElementType; }
3327  SourceLocation getAttributeLoc() const { return Loc; }
3329  return VectorType::VectorKind(VectorTypeBits.VecKind);
3330  }
3331 
3332  bool isSugared() const { return false; }
3333  QualType desugar() const { return QualType(this, 0); }
3334 
3335  static bool classof(const Type *T) {
3336  return T->getTypeClass() == DependentVector;
3337  }
3338 
3339  void Profile(llvm::FoldingSetNodeID &ID) {
3340  Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind());
3341  }
3342 
3343  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3344  QualType ElementType, const Expr *SizeExpr,
3345  VectorType::VectorKind VecKind);
3346 };
3347 
3348 /// ExtVectorType - Extended vector type. This type is created using
3349 /// __attribute__((ext_vector_type(n)), where "n" is the number of elements.
3350 /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This
3351 /// class enables syntactic extensions, like Vector Components for accessing
3352 /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL
3353 /// Shading Language).
3354 class ExtVectorType : public VectorType {
3355  friend class ASTContext; // ASTContext creates these.
3356 
3357  ExtVectorType(QualType vecType, unsigned nElements, QualType canonType)
3358  : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {}
3359 
3360 public:
3361  static int getPointAccessorIdx(char c) {
3362  switch (c) {
3363  default: return -1;
3364  case 'x': case 'r': return 0;
3365  case 'y': case 'g': return 1;
3366  case 'z': case 'b': return 2;
3367  case 'w': case 'a': return 3;
3368  }
3369  }
3370 
3371  static int getNumericAccessorIdx(char c) {
3372  switch (c) {
3373  default: return -1;
3374  case '0': return 0;
3375  case '1': return 1;
3376  case '2': return 2;
3377  case '3': return 3;
3378  case '4': return 4;
3379  case '5': return 5;
3380  case '6': return 6;
3381  case '7': return 7;
3382  case '8': return 8;
3383  case '9': return 9;
3384  case 'A':
3385  case 'a': return 10;
3386  case 'B':
3387  case 'b': return 11;
3388  case 'C':
3389  case 'c': return 12;
3390  case 'D':
3391  case 'd': return 13;
3392  case 'E':
3393  case 'e': return 14;
3394  case 'F':
3395  case 'f': return 15;
3396  }
3397  }
3398 
3399  static int getAccessorIdx(char c, bool isNumericAccessor) {
3400  if (isNumericAccessor)
3401  return getNumericAccessorIdx(c);
3402  else
3403  return getPointAccessorIdx(c);
3404  }
3405 
3406  bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const {
3407  if (int idx = getAccessorIdx(c, isNumericAccessor)+1)
3408  return unsigned(idx-1) < getNumElements();
3409  return false;
3410  }
3411 
3412  bool isSugared() const { return false; }
3413  QualType desugar() const { return QualType(this, 0); }
3414 
3415  static bool classof(const Type *T) {
3416  return T->getTypeClass() == ExtVector;
3417  }
3418 };
3419 
3420 /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base
3421 /// class of FunctionNoProtoType and FunctionProtoType.
3422 class FunctionType : public Type {
3423  // The type returned by the function.
3424  QualType ResultType;
3425 
3426 public:
3427  /// Interesting information about a specific parameter that can't simply
3428  /// be reflected in parameter's type. This is only used by FunctionProtoType
3429  /// but is in FunctionType to make this class available during the
3430  /// specification of the bases of FunctionProtoType.
3431  ///
3432  /// It makes sense to model language features this way when there's some
3433  /// sort of parameter-specific override (such as an attribute) that
3434  /// affects how the function is called. For example, the ARC ns_consumed
3435  /// attribute changes whether a parameter is passed at +0 (the default)
3436  /// or +1 (ns_consumed). This must be reflected in the function type,
3437  /// but isn't really a change to the parameter type.
3438  ///
3439  /// One serious disadvantage of modelling language features this way is
3440  /// that they generally do not work with language features that attempt
3441  /// to destructure types. For example, template argument deduction will
3442  /// not be able to match a parameter declared as
3443  /// T (*)(U)
3444  /// against an argument of type
3445  /// void (*)(__attribute__((ns_consumed)) id)
3446  /// because the substitution of T=void, U=id into the former will
3447  /// not produce the latter.
3449  enum {
3450  ABIMask = 0x0F,
3451  IsConsumed = 0x10,
3452  HasPassObjSize = 0x20,
3453  IsNoEscape = 0x40,
3454  };
3455  unsigned char Data = 0;
3456 
3457  public:
3458  ExtParameterInfo() = default;
3459 
3460  /// Return the ABI treatment of this parameter.
3461  ParameterABI getABI() const { return ParameterABI(Data & ABIMask); }
3463  ExtParameterInfo copy = *this;
3464  copy.Data = (copy.Data & ~ABIMask) | unsigned(kind);
3465  return copy;
3466  }
3467 
3468  /// Is this parameter considered "consumed" by Objective-C ARC?
3469  /// Consumed parameters must have retainable object type.
3470  bool isConsumed() const { return (Data & IsConsumed); }
3471  ExtParameterInfo withIsConsumed(bool consumed) const {
3472  ExtParameterInfo copy = *this;
3473  if (consumed)
3474  copy.Data |= IsConsumed;
3475  else
3476  copy.Data &= ~IsConsumed;
3477  return copy;
3478  }
3479 
3480  bool hasPassObjectSize() const { return Data & HasPassObjSize; }
3482  ExtParameterInfo Copy = *this;
3483  Copy.Data |= HasPassObjSize;
3484  return Copy;
3485  }
3486 
3487  bool isNoEscape() const { return Data & IsNoEscape; }
3488  ExtParameterInfo withIsNoEscape(bool NoEscape) const {
3489  ExtParameterInfo Copy = *this;
3490  if (NoEscape)
3491  Copy.Data |= IsNoEscape;
3492  else
3493  Copy.Data &= ~IsNoEscape;
3494  return Copy;
3495  }
3496 
3497  unsigned char getOpaqueValue() const { return Data; }
3498  static ExtParameterInfo getFromOpaqueValue(unsigned char data) {
3499  ExtParameterInfo result;
3500  result.Data = data;
3501  return result;
3502  }
3503 
3505  return lhs.Data == rhs.Data;
3506  }
3507 
3509  return lhs.Data != rhs.Data;
3510  }
3511  };
3512 
3513  /// A class which abstracts out some details necessary for
3514  /// making a call.
3515  ///
3516  /// It is not actually used directly for storing this information in
3517  /// a FunctionType, although FunctionType does currently use the
3518  /// same bit-pattern.
3519  ///
3520  // If you add a field (say Foo), other than the obvious places (both,
3521  // constructors, compile failures), what you need to update is
3522  // * Operator==
3523  // * getFoo
3524  // * withFoo
3525  // * functionType. Add Foo, getFoo.
3526  // * ASTContext::getFooType
3527  // * ASTContext::mergeFunctionTypes
3528  // * FunctionNoProtoType::Profile
3529  // * FunctionProtoType::Profile
3530  // * TypePrinter::PrintFunctionProto
3531  // * AST read and write
3532  // * Codegen
3533  class ExtInfo {
3534  friend class FunctionType;
3535 
3536  // Feel free to rearrange or add bits, but if you go over 12,
3537  // you'll need to adjust both the Bits field below and
3538  // Type::FunctionTypeBitfields.
3539 
3540  // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck|
3541  // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 |
3542  //
3543  // regparm is either 0 (no regparm attribute) or the regparm value+1.
3544  enum { CallConvMask = 0x1F };
3545  enum { NoReturnMask = 0x20 };
3546  enum { ProducesResultMask = 0x40 };
3547  enum { NoCallerSavedRegsMask = 0x80 };
3548  enum { NoCfCheckMask = 0x800 };
3549  enum {
3550  RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask |
3551  NoCallerSavedRegsMask | NoCfCheckMask),
3552  RegParmOffset = 8
3553  }; // Assumed to be the last field
3554  uint16_t Bits = CC_C;
3555 
3556  ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {}
3557 
3558  public:
3559  // Constructor with no defaults. Use this when you know that you
3560  // have all the elements (when reading an AST file for example).
3561  ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc,
3562  bool producesResult, bool noCallerSavedRegs, bool NoCfCheck) {
3563  assert((!hasRegParm || regParm < 7) && "Invalid regparm value");
3564  Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) |
3565  (producesResult ? ProducesResultMask : 0) |
3566  (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) |
3567  (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) |
3568  (NoCfCheck ? NoCfCheckMask : 0);
3569  }
3570 
3571  // Constructor with all defaults. Use when for example creating a
3572  // function known to use defaults.
3573  ExtInfo() = default;
3574 
3575  // Constructor with just the calling convention, which is an important part
3576  // of the canonical type.
3577  ExtInfo(CallingConv CC) : Bits(CC) {}
3578 
3579  bool getNoReturn() const { return Bits & NoReturnMask; }
3580  bool getProducesResult() const { return Bits & ProducesResultMask; }
3581  bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; }
3582  bool getNoCfCheck() const { return Bits & NoCfCheckMask; }
3583  bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; }
3584 
3585  unsigned getRegParm() const {
3586  unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset;
3587  if (RegParm > 0)
3588  --RegParm;
3589  return RegParm;
3590  }
3591 
3592  CallingConv getCC() const { return CallingConv(Bits & CallConvMask); }
3593 
3594  bool operator==(ExtInfo Other) const {
3595  return Bits == Other.Bits;
3596  }
3597  bool operator!=(ExtInfo Other) const {
3598  return Bits != Other.Bits;
3599  }
3600 
3601  // Note that we don't have setters. That is by design, use
3602  // the following with methods instead of mutating these objects.
3603 
3604  ExtInfo withNoReturn(bool noReturn) const {
3605  if (noReturn)
3606  return ExtInfo(Bits | NoReturnMask);
3607  else
3608  return ExtInfo(Bits & ~NoReturnMask);
3609  }
3610 
3611  ExtInfo withProducesResult(bool producesResult) const {
3612  if (producesResult)
3613  return ExtInfo(Bits | ProducesResultMask);
3614  else
3615  return ExtInfo(Bits & ~ProducesResultMask);
3616  }
3617 
3618  ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const {
3619  if (noCallerSavedRegs)
3620  return ExtInfo(Bits | NoCallerSavedRegsMask);
3621  else
3622  return ExtInfo(Bits & ~NoCallerSavedRegsMask);
3623  }
3624 
3625  ExtInfo withNoCfCheck(bool noCfCheck) const {
3626  if (noCfCheck)
3627  return ExtInfo(Bits | NoCfCheckMask);
3628  else
3629  return ExtInfo(Bits & ~NoCfCheckMask);
3630  }
3631 
3632  ExtInfo withRegParm(unsigned RegParm) const {
3633  assert(RegParm < 7 && "Invalid regparm value");
3634  return ExtInfo((Bits & ~RegParmMask) |
3635  ((RegParm + 1) << RegParmOffset));
3636  }
3637 
3639  return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc);
3640  }
3641 
3642  void Profile(llvm::FoldingSetNodeID &ID) const {
3643  ID.AddInteger(Bits);
3644  }
3645  };
3646 
3647  /// A simple holder for a QualType representing a type in an
3648  /// exception specification. Unfortunately needed by FunctionProtoType
3649  /// because TrailingObjects cannot handle repeated types.
3651 
3652  /// A simple holder for various uncommon bits which do not fit in
3653  /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the
3654  /// alignment of subsequent objects in TrailingObjects. You must update
3655  /// hasExtraBitfields in FunctionProtoType after adding extra data here.
3656  struct alignas(void *) FunctionTypeExtraBitfields {
3657  /// The number of types in the exception specification.
3658  /// A whole unsigned is not needed here and according to
3659  /// [implimits] 8 bits would be enough here.
3661  };
3662 
3663 protected:
3665  QualType Canonical, bool Dependent,
3666  bool InstantiationDependent,
3667  bool VariablyModified, bool ContainsUnexpandedParameterPack,
3668  ExtInfo Info)
3669  : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
3670  ContainsUnexpandedParameterPack),
3671  ResultType(res) {
3672  FunctionTypeBits.ExtInfo = Info.Bits;
3673  }
3674 
3676  return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals);
3677  }
3678 
3679 public:
3680  QualType getReturnType() const { return ResultType; }
3681 
3682  bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
3683  unsigned getRegParmType() const { return getExtInfo().getRegParm(); }
3684 
3685  /// Determine whether this function type includes the GNU noreturn
3686  /// attribute. The C++11 [[noreturn]] attribute does not affect the function
3687  /// type.
3688  bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }
3689 
3690  CallingConv getCallConv() const { return getExtInfo().getCC(); }
3691  ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }
3692 
3693  static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0,
3694  "Const, volatile and restrict are assumed to be a subset of "
3695  "the fast qualifiers.");
3696 
3697  bool isConst() const { return getFastTypeQuals().hasConst(); }
3698  bool isVolatile() const { return getFastTypeQuals().hasVolatile(); }
3699  bool isRestrict() const { return getFastTypeQuals().hasRestrict(); }
3700 
3701  /// Determine the type of an expression that calls a function of
3702  /// this type.
3703  QualType getCallResultType(const ASTContext &Context) const {
3704  return getReturnType().getNonLValueExprType(Context);
3705  }
3706 
3707  static StringRef getNameForCallConv(CallingConv CC);
3708 
3709  static bool classof(const Type *T) {
3710  return T->getTypeClass() == FunctionNoProto ||
3711  T->getTypeClass() == FunctionProto;
3712  }
3713 };
3714 
3715 /// Represents a K&R-style 'int foo()' function, which has
3716 /// no information available about its arguments.
3717 class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
3718  friend class ASTContext; // ASTContext creates these.
3719 
3720  FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info)
3721  : FunctionType(FunctionNoProto, Result, Canonical,
3722  /*Dependent=*/false, /*InstantiationDependent=*/false,
3723  Result->isVariablyModifiedType(),
3724  /*ContainsUnexpandedParameterPack=*/false, Info) {}
3725 
3726 public:
3727  // No additional state past what FunctionType provides.
3728 
3729  bool isSugared() const { return false; }
3730  QualType desugar() const { return QualType(this, 0); }
3731 
3732  void Profile(llvm::FoldingSetNodeID &ID) {
3733  Profile(ID, getReturnType(), getExtInfo());
3734  }
3735 
3736  static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType,
3737  ExtInfo Info) {
3738  Info.Profile(ID);
3739  ID.AddPointer(ResultType.getAsOpaquePtr());
3740  }
3741 
3742  static bool classof(const Type *T) {
3743  return T->getTypeClass() == FunctionNoProto;
3744  }
3745 };
3746 
3747 /// Represents a prototype with parameter type info, e.g.
3748 /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no
3749 /// parameters, not as having a single void parameter. Such a type can have
3750 /// an exception specification, but this specification is not part of the
3751 /// canonical type. FunctionProtoType has several trailing objects, some of
3752 /// which optional. For more information about the trailing objects see
3753 /// the first comment inside FunctionProtoType.
3755  : public FunctionType,
3756  public llvm::FoldingSetNode,
3757  private llvm::TrailingObjects<
3758  FunctionProtoType, QualType, SourceLocation,
3759  FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType,
3760  Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> {
3761  friend class ASTContext; // ASTContext creates these.
3762  friend TrailingObjects;
3763 
3764  // FunctionProtoType is followed by several trailing objects, some of
3765  // which optional. They are in order:
3766  //
3767  // * An array of getNumParams() QualType holding the parameter types.
3768  // Always present. Note that for the vast majority of FunctionProtoType,
3769  // these will be the only trailing objects.
3770  //
3771  // * Optionally if the function is variadic, the SourceLocation of the
3772  // ellipsis.
3773  //
3774  // * Optionally if some extra data is stored in FunctionTypeExtraBitfields
3775  // (see FunctionTypeExtraBitfields and FunctionTypeBitfields):
3776  // a single FunctionTypeExtraBitfields. Present if and only if
3777  // hasExtraBitfields() is true.
3778  //
3779  // * Optionally exactly one of:
3780  // * an array of getNumExceptions() ExceptionType,
3781  // * a single Expr *,
3782  // * a pair of FunctionDecl *,
3783  // * a single FunctionDecl *
3784  // used to store information about the various types of exception
3785  // specification. See getExceptionSpecSize for the details.
3786  //
3787  // * Optionally an array of getNumParams() ExtParameterInfo holding
3788  // an ExtParameterInfo for each of the parameters. Present if and
3789  // only if hasExtParameterInfos() is true.
3790  //
3791  // * Optionally a Qualifiers object to represent extra qualifiers that can't
3792  // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only
3793  // if hasExtQualifiers() is true.
3794  //
3795  // The optional FunctionTypeExtraBitfields has to be before the data
3796  // related to the exception specification since it contains the number
3797  // of exception types.
3798  //
3799  // We put the ExtParameterInfos last. If all were equal, it would make
3800  // more sense to put these before the exception specification, because
3801  // it's much easier to skip past them compared to the elaborate switch
3802  // required to skip the exception specification. However, all is not
3803  // equal; ExtParameterInfos are used to model very uncommon features,
3804  // and it's better not to burden the more common paths.
3805 
3806 public:
3807  /// Holds information about the various types of exception specification.
3808  /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is
3809  /// used to group together the various bits of information about the
3810  /// exception specification.
3812  /// The kind of exception specification this is.
3814 
3815  /// Explicitly-specified list of exception types.
3817 
3818  /// Noexcept expression, if this is a computed noexcept specification.
3819  Expr *NoexceptExpr = nullptr;
3820 
3821  /// The function whose exception specification this is, for
3822  /// EST_Unevaluated and EST_Uninstantiated.
3823  FunctionDecl *SourceDecl = nullptr;
3824 
3825  /// The function template whose exception specification this is instantiated
3826  /// from, for EST_Uninstantiated.
3827  FunctionDecl *SourceTemplate = nullptr;
3828 
3829  ExceptionSpecInfo() = default;
3830 
3832  };
3833 
3834  /// Extra information about a function prototype. ExtProtoInfo is not
3835  /// stored as such in FunctionProtoType but is used to group together
3836  /// the various bits of extra information about a function prototype.
3837  struct ExtProtoInfo {
3839  bool Variadic : 1;
3842  RefQualifierKind RefQualifier = RQ_None;
3844  const ExtParameterInfo *ExtParameterInfos = nullptr;
3846 
3847  ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {}
3848 
3850  : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {}
3851 
3853  ExtProtoInfo Result(*this);
3854  Result.ExceptionSpec = ESI;
3855  return Result;
3856  }
3857  };
3858 
3859 private:
3860  unsigned numTrailingObjects(OverloadToken<QualType>) const {
3861  return getNumParams();
3862  }
3863 
3864  unsigned numTrailingObjects(OverloadToken<SourceLocation>) const {
3865  return isVariadic();
3866  }
3867 
3868  unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const {
3869  return hasExtraBitfields();
3870  }
3871 
3872  unsigned numTrailingObjects(OverloadToken<ExceptionType>) const {
3873  return getExceptionSpecSize().NumExceptionType;
3874  }
3875 
3876  unsigned numTrailingObjects(OverloadToken<Expr *>) const {
3877  return getExceptionSpecSize().NumExprPtr;
3878  }
3879 
3880  unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const {
3881  return getExceptionSpecSize().NumFunctionDeclPtr;
3882  }
3883 
3884  unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const {
3885  return hasExtParameterInfos() ? getNumParams() : 0;
3886  }
3887 
3888  /// Determine whether there are any argument types that
3889  /// contain an unexpanded parameter pack.
3890  static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray,
3891  unsigned numArgs) {
3892  for (unsigned Idx = 0; Idx < numArgs; ++Idx)
3893  if (ArgArray[Idx]->containsUnexpandedParameterPack())
3894  return true;
3895 
3896  return false;
3897  }
3898 
3900  QualType canonical, const ExtProtoInfo &epi);
3901 
3902  /// This struct is returned by getExceptionSpecSize and is used to
3903  /// translate an ExceptionSpecificationType to the number and kind
3904  /// of trailing objects related to the exception specification.
3905  struct ExceptionSpecSizeHolder {
3906  unsigned NumExceptionType;
3907  unsigned NumExprPtr;
3908  unsigned NumFunctionDeclPtr;
3909  };
3910 
3911  /// Return the number and kind of trailing objects
3912  /// related to the exception specification.
3913  static ExceptionSpecSizeHolder
3914  getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) {
3915  switch (EST) {
3916  case EST_None:
3917  case EST_DynamicNone:
3918  case EST_MSAny:
3919  case EST_BasicNoexcept:
3920  case EST_Unparsed:
3921  case EST_NoThrow:
3922  return {0, 0, 0};
3923 
3924  case EST_Dynamic:
3925  return {NumExceptions, 0, 0};
3926 
3927  case EST_DependentNoexcept:
3928  case EST_NoexceptFalse:
3929  case EST_NoexceptTrue:
3930  return {0, 1, 0};
3931 
3932  case EST_Uninstantiated:
3933  return {0, 0, 2};
3934 
3935  case EST_Unevaluated:
3936  return {0, 0, 1};
3937  }
3938  llvm_unreachable("bad exception specification kind");
3939  }
3940 
3941  /// Return the number and kind of trailing objects
3942  /// related to the exception specification.
3943  ExceptionSpecSizeHolder getExceptionSpecSize() const {
3944  return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions());
3945  }
3946 
3947  /// Whether the trailing FunctionTypeExtraBitfields is present.
3948  static bool hasExtraBitfields(ExceptionSpecificationType EST) {
3949  // If the exception spec type is EST_Dynamic then we have > 0 exception
3950  // types and the exact number is stored in FunctionTypeExtraBitfields.
3951  return EST == EST_Dynamic;
3952  }
3953 
3954  /// Whether the trailing FunctionTypeExtraBitfields is present.
3955  bool hasExtraBitfields() const {
3956  return hasExtraBitfields(getExceptionSpecType());
3957  }
3958 
3959  bool hasExtQualifiers() const {
3960  return FunctionTypeBits.HasExtQuals;
3961  }
3962 
3963 public:
3964  unsigned getNumParams() const { return FunctionTypeBits.NumParams; }
3965 
3966  QualType getParamType(unsigned i) const {
3967  assert(i < getNumParams() && "invalid parameter index");
3968  return param_type_begin()[i];
3969  }
3970 
3972  return llvm::makeArrayRef(param_type_begin(), param_type_end());
3973  }
3974 
3976  ExtProtoInfo EPI;
3977  EPI.ExtInfo = getExtInfo();
3978  EPI.Variadic = isVariadic();
3979  EPI.EllipsisLoc = getEllipsisLoc();
3980  EPI.HasTrailingReturn = hasTrailingReturn();
3981  EPI.ExceptionSpec = getExceptionSpecInfo();
3982  EPI.TypeQuals = getMethodQuals();
3983  EPI.RefQualifier = getRefQualifier();
3984  EPI.ExtParameterInfos = getExtParameterInfosOrNull();
3985  return EPI;
3986  }
3987 
3988  /// Get the kind of exception specification on this function.
3990  return static_cast<ExceptionSpecificationType>(
3991  FunctionTypeBits.ExceptionSpecType);
3992  }
3993 
3994  /// Return whether this function has any kind of exception spec.
3995  bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; }
3996 
3997  /// Return whether this function has a dynamic (throw) exception spec.
3999  return isDynamicExceptionSpec(getExceptionSpecType());
4000  }
4001 
4002  /// Return whether this function has a noexcept exception spec.
4004  return isNoexceptExceptionSpec(getExceptionSpecType());
4005  }
4006 
4007  /// Return whether this function has a dependent exception spec.
4008  bool hasDependentExceptionSpec() const;
4009 
4010  /// Return whether this function has an instantiation-dependent exception
4011  /// spec.
4012  bool hasInstantiationDependentExceptionSpec() const;
4013 
4014  /// Return all the available information about this type's exception spec.
4016  ExceptionSpecInfo Result;
4017  Result.Type = getExceptionSpecType();
4018  if (Result.Type == EST_Dynamic) {
4019  Result.Exceptions = exceptions();
4020  } else if (isComputedNoexcept(Result.Type)) {
4021  Result.NoexceptExpr = getNoexceptExpr();
4022  } else if (Result.Type == EST_Uninstantiated) {
4023  Result.SourceDecl = getExceptionSpecDecl();
4024  Result.SourceTemplate = getExceptionSpecTemplate();
4025  } else if (Result.Type == EST_Unevaluated) {
4026  Result.SourceDecl = getExceptionSpecDecl();
4027  }
4028  return Result;
4029  }
4030 
4031  /// Return the number of types in the exception specification.
4032  unsigned getNumExceptions() const {
4033  return getExceptionSpecType() == EST_Dynamic
4034  ? getTrailingObjects<FunctionTypeExtraBitfields>()
4035  ->NumExceptionType
4036  : 0;
4037  }
4038 
4039  /// Return the ith exception type, where 0 <= i < getNumExceptions().
4040  QualType getExceptionType(unsigned i) const {
4041  assert(i < getNumExceptions() && "Invalid exception number!");
4042  return exception_begin()[i];
4043  }
4044 
4045  /// Return the expression inside noexcept(expression), or a null pointer
4046  /// if there is none (because the exception spec is not of this form).
4048  if (!isComputedNoexcept(getExceptionSpecType()))
4049  return nullptr;
4050  return *getTrailingObjects<Expr *>();
4051  }
4052 
4053  /// If this function type has an exception specification which hasn't
4054  /// been determined yet (either because it has not been evaluated or because
4055  /// it has not been instantiated), this is the function whose exception
4056  /// specification is represented by this type.
4058  if (getExceptionSpecType() != EST_Uninstantiated &&
4059  getExceptionSpecType() != EST_Unevaluated)
4060  return nullptr;
4061  return getTrailingObjects<FunctionDecl *>()[0];
4062  }
4063 
4064  /// If this function type has an uninstantiated exception
4065  /// specification, this is the function whose exception specification
4066  /// should be instantiated to find the exception specification for
4067  /// this type.
4069  if (getExceptionSpecType() != EST_Uninstantiated)
4070  return nullptr;
4071  return getTrailingObjects<FunctionDecl *>()[1];
4072  }
4073 
4074  /// Determine whether this function type has a non-throwing exception
4075  /// specification.
4076  CanThrowResult canThrow() const;
4077 
4078  /// Determine whether this function type has a non-throwing exception
4079  /// specification. If this depends on template arguments, returns
4080  /// \c ResultIfDependent.
4081  bool isNothrow(bool ResultIfDependent = false) const {
4082  return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot;
4083  }
4084 
4085  /// Whether this function prototype is variadic.
4086  bool isVariadic() const { return FunctionTypeBits.Variadic; }
4087 
4089  return isVariadic() ? *getTrailingObjects<SourceLocation>()
4090  : SourceLocation();
4091  }
4092 
4093  /// Determines whether this function prototype contains a
4094  /// parameter pack at the end.
4095  ///
4096  /// A function template whose last parameter is a parameter pack can be
4097  /// called with an arbitrary number of arguments, much like a variadic
4098  /// function.
4099  bool isTemplateVariadic() const;
4100 
4101  /// Whether this function prototype has a trailing return type.
4102  bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; }
4103 
4105  if (hasExtQualifiers())
4106  return *getTrailingObjects<Qualifiers>();
4107  else
4108  return getFastTypeQuals();
4109  }
4110 
4111  /// Retrieve the ref-qualifier associated with this function type.
4113  return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
4114  }
4115 
4117  using param_type_range = llvm::iterator_range<param_type_iterator>;
4118 
4120  return param_type_range(param_type_begin(), param_type_end());
4121  }
4122 
4124  return getTrailingObjects<QualType>();
4125  }
4126 
4128  return param_type_begin() + getNumParams();
4129  }
4130 
4131  using exception_iterator = const QualType *;
4132 
4134  return llvm::makeArrayRef(exception_begin(), exception_end());
4135  }
4136 
4138  return reinterpret_cast<exception_iterator>(
4139  getTrailingObjects<ExceptionType>());
4140  }
4141 
4143  return exception_begin() + getNumExceptions();
4144  }
4145 
4146  /// Is there any interesting extra information for any of the parameters
4147  /// of this function type?
4148  bool hasExtParameterInfos() const {
4149  return FunctionTypeBits.HasExtParameterInfos;
4150  }
4151 
4153  assert(hasExtParameterInfos());
4154  return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(),
4155  getNumParams());
4156  }
4157 
4158  /// Return a pointer to the beginning of the array of extra parameter
4159  /// information, if present, or else null if none of the parameters
4160  /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos.
4162  if (!hasExtParameterInfos())
4163  return nullptr;
4164  return getTrailingObjects<ExtParameterInfo>();
4165  }
4166 
4168  assert(I < getNumParams() && "parameter index out of range");
4169  if (hasExtParameterInfos())
4170  return getTrailingObjects<ExtParameterInfo>()[I];
4171  return ExtParameterInfo();
4172  }
4173 
4174  ParameterABI getParameterABI(unsigned I) const {
4175  assert(I < getNumParams() && "parameter index out of range");
4176  if (hasExtParameterInfos())
4177  return getTrailingObjects<ExtParameterInfo>()[I].getABI();
4178  return ParameterABI::Ordinary;
4179  }
4180 
4181  bool isParamConsumed(unsigned I) const {
4182  assert(I < getNumParams() && "parameter index out of range");
4183  if (hasExtParameterInfos())
4184  return getTrailingObjects<ExtParameterInfo>()[I].isConsumed();
4185  return false;
4186  }
4187 
4188  bool isSugared() const { return false; }
4189  QualType desugar() const { return QualType(this, 0); }
4190 
4191  void printExceptionSpecification(raw_ostream &OS,
4192  const PrintingPolicy &Policy) const;
4193 
4194  static bool classof(const Type *T) {
4195  return T->getTypeClass() == FunctionProto;
4196  }
4197 
4198  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx);
4199  static void Profile(llvm::FoldingSetNodeID &ID, QualType Result,
4200  param_type_iterator ArgTys, unsigned NumArgs,
4201  const ExtProtoInfo &EPI, const ASTContext &Context,
4202  bool Canonical);
4203 };
4204 
4205 /// Represents the dependent type named by a dependently-scoped
4206 /// typename using declaration, e.g.
4207 /// using typename Base<T>::foo;
4208 ///
4209 /// Template instantiation turns these into the underlying type.
4210 class UnresolvedUsingType : public Type {
4211  friend class ASTContext; // ASTContext creates these.
4212 
4214 
4216  : Type(UnresolvedUsing, QualType(), true, true, false,
4217  /*ContainsUnexpandedParameterPack=*/false),
4218  Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {}
4219 
4220 public:
4221  UnresolvedUsingTypenameDecl *getDecl() const { return Decl; }
4222 
4223  bool isSugared() const { return false; }
4224  QualType desugar() const { return QualType(this, 0); }
4225 
4226  static bool classof(const Type *T) {
4227  return T->getTypeClass() == UnresolvedUsing;
4228  }
4229 
4230  void Profile(llvm::FoldingSetNodeID &ID) {
4231  return Profile(ID, Decl);
4232  }
4233 
4234  static void Profile(llvm::FoldingSetNodeID &ID,
4236  ID.AddPointer(D);
4237  }
4238 };
4239 
4240 class TypedefType : public Type {
4242 
4243 protected:
4244  friend class ASTContext; // ASTContext creates these.
4245 
4247  : Type(tc, can, can->isDependentType(),
4248  can->isInstantiationDependentType(),
4249  can->isVariablyModifiedType(),
4250  /*ContainsUnexpandedParameterPack=*/false),
4251  Decl(const_cast<TypedefNameDecl*>(D)) {
4252  assert(!isa<TypedefType>(can) && "Invalid canonical type");
4253  }
4254 
4255 public:
4256  TypedefNameDecl *getDecl() const { return Decl; }
4257 
4258  bool isSugared() const { return true; }
4259  QualType desugar() const;
4260 
4261  static bool classof(const Type *T) { return T->getTypeClass() == Typedef; }
4262 };
4263 
4264 /// Sugar type that represents a type that was qualified by a qualifier written
4265 /// as a macro invocation.
4266 class MacroQualifiedType : public Type {
4267  friend class ASTContext; // ASTContext creates these.
4268 
4269  QualType UnderlyingTy;
4270  const IdentifierInfo *MacroII;
4271 
4272  MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy,
4273  const IdentifierInfo *MacroII)
4274  : Type(MacroQualified, CanonTy, UnderlyingTy->isDependentType(),
4275  UnderlyingTy->isInstantiationDependentType(),
4276  UnderlyingTy->isVariablyModifiedType(),
4277  UnderlyingTy->containsUnexpandedParameterPack()),
4278  UnderlyingTy(UnderlyingTy), MacroII(MacroII) {
4279  assert(isa<AttributedType>(UnderlyingTy) &&
4280  "Expected a macro qualified type to only wrap attributed types.");
4281  }
4282 
4283 public:
4284  const IdentifierInfo *getMacroIdentifier() const { return MacroII; }
4285  QualType getUnderlyingType() const { return UnderlyingTy; }
4286 
4287  /// Return this attributed type's modified type with no qualifiers attached to
4288  /// it.
4289  QualType getModifiedType() const;
4290 
4291  bool isSugared() const { return true; }
4292  QualType desugar() const;
4293 
4294  static bool classof(const Type *T) {
4295  return T->getTypeClass() == MacroQualified;
4296  }
4297 };
4298 
4299 /// Represents a `typeof` (or __typeof__) expression (a GCC extension).
4300 class TypeOfExprType : public Type {
4301  Expr *TOExpr;
4302 
4303 protected:
4304  friend class ASTContext; // ASTContext creates these.
4305 
4306  TypeOfExprType(Expr *E, QualType can = QualType());
4307 
4308 public:
4309  Expr *getUnderlyingExpr() const { return TOExpr; }
4310 
4311  /// Remove a single level of sugar.
4312  QualType desugar() const;
4313 
4314  /// Returns whether this type directly provides sugar.
4315  bool isSugared() const;
4316 
4317  static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; }
4318 };
4319 
4320 /// Internal representation of canonical, dependent
4321 /// `typeof(expr)` types.
4322 ///
4323 /// This class is used internally by the ASTContext to manage
4324 /// canonical, dependent types, only. Clients will only see instances
4325 /// of this class via TypeOfExprType nodes.
4327  : public TypeOfExprType, public llvm::FoldingSetNode {
4328  const ASTContext &Context;
4329 
4330 public:
4332  : TypeOfExprType(E), Context(Context) {}
4333 
4334  void Profile(llvm::FoldingSetNodeID &ID) {
4335  Profile(ID, Context, getUnderlyingExpr());
4336  }
4337 
4338  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
4339  Expr *E);
4340 };
4341 
4342 /// Represents `typeof(type)`, a GCC extension.
4343 class TypeOfType : public Type {
4344  friend class ASTContext; // ASTContext creates these.
4345 
4346  QualType TOType;
4347 
4348  TypeOfType(QualType T, QualType can)
4349  : Type(TypeOf, can, T->isDependentType(),
4350  T->isInstantiationDependentType(),
4351  T->isVariablyModifiedType(),
4352  T->containsUnexpandedParameterPack()),
4353  TOType(T) {
4354  assert(!isa<TypedefType>(can) && "Invalid canonical type");
4355  }
4356 
4357 public:
4358  QualType getUnderlyingType() const { return TOType; }
4359 
4360  /// Remove a single level of sugar.
4361  QualType desugar() const { return getUnderlyingType(); }
4362 
4363  /// Returns whether this type directly provides sugar.
4364  bool isSugared() const { return true; }
4365 
4366  static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; }
4367 };
4368 
4369 /// Represents the type `decltype(expr)` (C++11).
4370 class DecltypeType : public Type {
4371  Expr *E;
4372  QualType UnderlyingType;
4373 
4374 protected:
4375  friend class ASTContext; // ASTContext creates these.
4376 
4377  DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType());
4378 
4379 public:
4380  Expr *getUnderlyingExpr() const { return E; }
4381  QualType getUnderlyingType() const { return UnderlyingType; }
4382 
4383  /// Remove a single level of sugar.
4384  QualType desugar() const;
4385 
4386  /// Returns whether this type directly provides sugar.
4387  bool isSugared() const;
4388 
4389  static bool classof(const Type *T) { return T->getTypeClass() == Decltype; }
4390 };
4391 
4392 /// Internal representation of canonical, dependent
4393 /// decltype(expr) types.
4394 ///
4395 /// This class is used internally by the ASTContext to manage
4396 /// canonical, dependent types, only. Clients will only see instances
4397 /// of this class via DecltypeType nodes.
4398 class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode {
4399  const ASTContext &Context;
4400 
4401 public:
4402  DependentDecltypeType(const ASTContext &Context, Expr *E);
4403 
4404  void Profile(llvm::FoldingSetNodeID &ID) {
4405  Profile(ID, Context, getUnderlyingExpr());
4406  }
4407 
4408  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
4409  Expr *E);
4410 };
4411 
4412 /// A unary type transform, which is a type constructed from another.
4413 class UnaryTransformType : public Type {
4414 public:
4415  enum UTTKind {
4416  EnumUnderlyingType
4417  };
4418 
4419 private:
4420  /// The untransformed type.
4421  QualType BaseType;
4422 
4423  /// The transformed type if not dependent, otherwise the same as BaseType.
4424  QualType UnderlyingType;
4425 
4426  UTTKind UKind;
4427 
4428 protected:
4429  friend class ASTContext;
4430 
4431  UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind,
4432  QualType CanonicalTy);
4433 
4434 public:
4435  bool isSugared() const { return !isDependentType(); }
4436  QualType desugar() const { return UnderlyingType; }
4437 
4438  QualType getUnderlyingType() const { return UnderlyingType; }
4439  QualType getBaseType() const { return BaseType; }
4440 
4441  UTTKind getUTTKind() const { return UKind; }
4442 
4443  static bool classof(const Type *T) {
4444  return T->getTypeClass() == UnaryTransform;
4445  }
4446 };
4447 
4448 /// Internal representation of canonical, dependent
4449 /// __underlying_type(type) types.
4450 ///
4451 /// This class is used internally by the ASTContext to manage
4452 /// canonical, dependent types, only. Clients will only see instances
4453 /// of this class via UnaryTransformType nodes.
4455  public llvm::FoldingSetNode {
4456 public:
4457  DependentUnaryTransformType(const ASTContext &C, QualType BaseType,
4458  UTTKind UKind);
4459 
4460  void Profile(llvm::FoldingSetNodeID &ID) {
4461  Profile(ID, getBaseType(), getUTTKind());
4462  }
4463 
4464  static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType,
4465  UTTKind UKind) {
4466  ID.AddPointer(BaseType.getAsOpaquePtr());
4467  ID.AddInteger((unsigned)UKind);
4468  }
4469 };
4470 
4471 class TagType : public Type {
4472  friend class ASTReader;
4473  template <class T> friend class serialization::AbstractTypeReader;
4474 
4475  /// Stores the TagDecl associated with this type. The decl may point to any
4476  /// TagDecl that declares the entity.
4477  TagDecl *decl;
4478 
4479 protected:
4480  TagType(TypeClass TC, const TagDecl *D, QualType can);
4481 
4482 public:
4483  TagDecl *getDecl() const;
4484 
4485  /// Determines whether this type is in the process of being defined.
4486  bool isBeingDefined() const;
4487 
4488  static bool classof(const Type *T) {
4489  return T->getTypeClass() == Enum || T->getTypeClass() == Record;
4490  }
4491 };
4492 
4493 /// A helper class that allows the use of isa/cast/dyncast
4494 /// to detect TagType objects of structs/unions/classes.
4495 class RecordType : public TagType {
4496 protected:
4497  friend class ASTContext; // ASTContext creates these.
4498 
4499  explicit RecordType(const RecordDecl *D)
4500  : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {}
4502  : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {}
4503 
4504 public:
4505  RecordDecl *getDecl() const {
4506  return reinterpret_cast<RecordDecl*>(TagType::getDecl());
4507  }
4508 
4509  /// Recursively check all fields in the record for const-ness. If any field
4510  /// is declared const, return true. Otherwise, return false.
4511  bool hasConstFields() const;
4512 
4513  bool isSugared() const { return false; }
4514  QualType desugar() const { return QualType(this, 0); }
4515 
4516  static bool classof(const Type *T) { return T->getTypeClass() == Record; }
4517 };
4518 
4519 /// A helper class that allows the use of isa/cast/dyncast
4520 /// to detect TagType objects of enums.
4521 class EnumType : public TagType {
4522  friend class ASTContext; // ASTContext creates these.
4523 
4524  explicit EnumType(const EnumDecl *D)
4525  : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {}
4526 
4527 public:
4528  EnumDecl *getDecl() const {
4529  return reinterpret_cast<EnumDecl*>(TagType::getDecl());
4530  }
4531 
4532  bool isSugared() const { return false; }
4533  QualType desugar() const { return QualType(this, 0); }
4534 
4535  static bool classof(const Type *T) { return T->getTypeClass() == Enum; }
4536 };
4537 
4538 /// An attributed type is a type to which a type attribute has been applied.
4539 ///
4540 /// The "modified type" is the fully-sugared type to which the attributed
4541 /// type was applied; generally it is not canonically equivalent to the
4542 /// attributed type. The "equivalent type" is the minimally-desugared type
4543 /// which the type is canonically equivalent to.
4544 ///
4545 /// For example, in the following attributed type:
4546 /// int32_t __attribute__((vector_size(16)))
4547 /// - the modified type is the TypedefType for int32_t
4548 /// - the equivalent type is VectorType(16, int32_t)
4549 /// - the canonical type is VectorType(16, int)
4550 class AttributedType : public Type, public llvm::FoldingSetNode {
4551 public:
4552  using Kind = attr::Kind;
4553 
4554 private:
4555  friend class ASTContext; // ASTContext creates these
4556 
4557  QualType ModifiedType;
4558  QualType EquivalentType;
4559 
4560  AttributedType(QualType canon, attr::Kind attrKind, QualType modified,
4561  QualType equivalent)
4562  : Type(Attributed, canon, equivalent->isDependentType(),
4563  equivalent->isInstantiationDependentType(),
4564  equivalent->isVariablyModifiedType(),
4565  equivalent->containsUnexpandedParameterPack()),
4566  ModifiedType(modified), EquivalentType(equivalent) {
4567  AttributedTypeBits.AttrKind = attrKind;
4568  }
4569 
4570 public:
4571  Kind getAttrKind() const {
4572  return static_cast<Kind>(AttributedTypeBits.AttrKind);
4573  }
4574 
4575  QualType getModifiedType() const { return ModifiedType; }
4576  QualType getEquivalentType() const { return EquivalentType; }
4577 
4578  bool isSugared() const { return true; }
4579  QualType desugar() const { return getEquivalentType(); }
4580 
4581  /// Does this attribute behave like a type qualifier?
4582  ///
4583  /// A type qualifier adjusts a type to provide specialized rules for
4584  /// a specific object, like the standard const and volatile qualifiers.
4585  /// This includes attributes controlling things like nullability,
4586  /// address spaces, and ARC ownership. The value of the object is still
4587  /// largely described by the modified type.
4588  ///
4589  /// In contrast, many type attributes "rewrite" their modified type to
4590  /// produce a fundamentally different type, not necessarily related in any
4591  /// formalizable way to the original type. For example, calling convention
4592  /// and vector attributes are not simple type qualifiers.
4593  ///
4594  /// Type qualifiers are often, but not always, reflected in the canonical
4595  /// type.
4596  bool isQualifier() const;
4597 
4598  bool isMSTypeSpec() const;
4599 
4600  bool isCallingConv() const;
4601 
4602  llvm::Optional<NullabilityKind> getImmediateNullability() const;
4603 
4604  /// Retrieve the attribute kind corresponding to the given
4605  /// nullability kind.
4607  switch (kind) {
4609  return attr::TypeNonNull;
4610 
4612  return attr::TypeNullable;
4613 
4615  return attr::TypeNullUnspecified;
4616  }
4617  llvm_unreachable("Unknown nullability kind.");
4618  }
4619 
4620  /// Strip off the top-level nullability annotation on the given
4621  /// type, if it's there.
4622  ///
4623  /// \param T The type to strip. If the type is exactly an
4624  /// AttributedType specifying nullability (without looking through
4625  /// type sugar), the nullability is returned and this type changed
4626  /// to the underlying modified type.
4627  ///
4628  /// \returns the top-level nullability, if present.
4629  static Optional<NullabilityKind> stripOuterNullability(QualType &T);
4630 
4631  void Profile(llvm::FoldingSetNodeID &ID) {
4632  Profile(ID, getAttrKind(), ModifiedType, EquivalentType);
4633  }
4634 
4635  static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind,
4636  QualType modified, QualType equivalent) {
4637  ID.AddInteger(attrKind);
4638  ID.AddPointer(modified.getAsOpaquePtr());
4639  ID.AddPointer(equivalent.getAsOpaquePtr());
4640  }
4641 
4642  static bool classof(const Type *T) {
4643  return T->getTypeClass() == Attributed;
4644  }
4645 };
4646 
4647 class TemplateTypeParmType : public Type, public llvm::FoldingSetNode {
4648  friend class ASTContext; // ASTContext creates these
4649 
4650  // Helper data collector for canonical types.
4651  struct CanonicalTTPTInfo {
4652  unsigned Depth : 15;
4653  unsigned ParameterPack : 1;
4654  unsigned Index : 16;
4655  };
4656 
4657  union {
4658  // Info for the canonical type.
4659  CanonicalTTPTInfo CanTTPTInfo;
4660 
4661  // Info for the non-canonical type.
4663  };
4664 
4665  /// Build a non-canonical type.
4667  : Type(TemplateTypeParm, Canon, /*Dependent=*/true,
4668  /*InstantiationDependent=*/true,
4669  /*VariablyModified=*/false,
4670  Canon->containsUnexpandedParameterPack()),
4671  TTPDecl(TTPDecl) {}
4672 
4673  /// Build the canonical type.
4674  TemplateTypeParmType(unsigned D, unsigned I, bool PP)
4675  : Type(TemplateTypeParm, QualType(this, 0),
4676  /*Dependent=*/true,
4677  /*InstantiationDependent=*/true,
4678  /*VariablyModified=*/false, PP) {
4679  CanTTPTInfo.Depth = D;
4680  CanTTPTInfo.Index = I;
4681  CanTTPTInfo.ParameterPack = PP;
4682  }
4683 
4684  const CanonicalTTPTInfo& getCanTTPTInfo() const {
4685  QualType Can = getCanonicalTypeInternal();
4686  return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo;
4687  }
4688 
4689 public:
4690  unsigned getDepth() const { return getCanTTPTInfo().Depth; }
4691  unsigned getIndex() const { return getCanTTPTInfo().Index; }
4692  bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; }
4693 
4695  return isCanonicalUnqualified() ? nullptr : TTPDecl;
4696  }
4697 
4698  IdentifierInfo *getIdentifier() const;
4699 
4700  bool isSugared() const { return false; }
4701  QualType desugar() const { return QualType(this, 0); }
4702 
4703  void Profile(llvm::FoldingSetNodeID &ID) {
4704  Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl());
4705  }
4706 
4707  static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth,
4708  unsigned Index, bool ParameterPack,
4709  TemplateTypeParmDecl *TTPDecl) {
4710  ID.AddInteger(Depth);
4711  ID.AddInteger(Index);
4712  ID.AddBoolean(ParameterPack);
4713  ID.AddPointer(TTPDecl);
4714  }
4715 
4716  static bool classof(const Type *T) {
4717  return T->getTypeClass() == TemplateTypeParm;
4718  }
4719 };
4720 
4721 /// Represents the result of substituting a type for a template
4722 /// type parameter.
4723 ///
4724 /// Within an instantiated template, all template type parameters have
4725 /// been replaced with these. They are used solely to record that a
4726 /// type was originally written as a template type parameter;
4727 /// therefore they are never canonical.
4728 class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode {
4729  friend class ASTContext;
4730 
4731  // The original type parameter.
4732  const TemplateTypeParmType *Replaced;
4733 
4735  : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(),
4736  Canon->isInstantiationDependentType(),
4737  Canon->isVariablyModifiedType(),
4738  Canon->containsUnexpandedParameterPack()),
4739  Replaced(Param) {}
4740 
4741 public:
4742  /// Gets the template parameter that was substituted for.
4744  return Replaced;
4745  }
4746 
4747  /// Gets the type that was substituted for the template
4748  /// parameter.
4750  return getCanonicalTypeInternal();
4751  }
4752 
4753  bool isSugared() const { return true; }
4754  QualType desugar() const { return getReplacementType(); }
4755 
4756  void Profile(llvm::FoldingSetNodeID &ID) {
4757  Profile(ID, getReplacedParameter(), getReplacementType());
4758  }
4759 
4760  static void Profile(llvm::FoldingSetNodeID &ID,
4761  const TemplateTypeParmType *Replaced,
4762  QualType Replacement) {
4763  ID.AddPointer(Replaced);
4764  ID.AddPointer(Replacement.getAsOpaquePtr());
4765  }
4766 
4767  static bool classof(const Type *T) {
4768  return T->getTypeClass() == SubstTemplateTypeParm;
4769  }
4770 };
4771 
4772 /// Represents the result of substituting a set of types for a template
4773 /// type parameter pack.
4774 ///
4775 /// When a pack expansion in the source code contains multiple parameter packs
4776 /// and those parameter packs correspond to different levels of template
4777 /// parameter lists, this type node is used to represent a template type
4778 /// parameter pack from an outer level, which has already had its argument pack
4779 /// substituted but that still lives within a pack expansion that itself
4780 /// could not be instantiated. When actually performing a substitution into
4781 /// that pack expansion (e.g., when all template parameters have corresponding
4782 /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType
4783 /// at the current pack substitution index.
4784 class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode {
4785  friend class ASTContext;
4786 
4787  /// The original type parameter.
4788  const TemplateTypeParmType *Replaced;
4789 
4790  /// A pointer to the set of template arguments that this
4791  /// parameter pack is instantiated with.
4792  const TemplateArgument *Arguments;
4793 
4795  QualType Canon,
4796  const TemplateArgument &ArgPack);
4797 
4798 public:
4799  IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); }
4800 
4801  /// Gets the template parameter that was substituted for.
4803  return Replaced;
4804  }
4805 
4806  unsigned getNumArgs() const {
4807  return SubstTemplateTypeParmPackTypeBits.NumArgs;
4808  }
4809 
4810  bool isSugared() const { return false; }
4811  QualType desugar() const { return QualType(this, 0); }
4812 
4813  TemplateArgument getArgumentPack() const;
4814 
4815  void Profile(llvm::FoldingSetNodeID &ID);
4816  static void Profile(llvm::FoldingSetNodeID &ID,
4817  const TemplateTypeParmType *Replaced,
4818  const TemplateArgument &ArgPack);
4819 
4820  static bool classof(const Type *T) {
4821  return T->getTypeClass() == SubstTemplateTypeParmPack;
4822  }
4823 };
4824 
4825 /// Common base class for placeholders for types that get replaced by
4826 /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced
4827 /// class template types, and constrained type names.
4828 ///
4829 /// These types are usually a placeholder for a deduced type. However, before
4830 /// the initializer is attached, or (usually) if the initializer is
4831 /// type-dependent, there is no deduced type and the type is canonical. In
4832 /// the latter case, it is also a dependent type.
4833 class DeducedType : public Type {
4834 protected:
4835  DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent,
4836  bool IsInstantiationDependent, bool ContainsParameterPack)
4837  : Type(TC,
4838  // FIXME: Retain the sugared deduced type?
4839  DeducedAsType.isNull() ? QualType(this, 0)
4840  : DeducedAsType.getCanonicalType(),
4841  IsDependent, IsInstantiationDependent,
4842  /*VariablyModified=*/false, ContainsParameterPack) {
4843  if (!DeducedAsType.isNull()) {
4844  if (DeducedAsType->isDependentType())
4845  setDependent();
4846  if (DeducedAsType->isInstantiationDependentType())
4847  setInstantiationDependent();
4848  if (DeducedAsType->containsUnexpandedParameterPack())
4849  setContainsUnexpandedParameterPack();
4850  }
4851  }
4852 
4853 public:
4854  bool isSugared() const { return !isCanonicalUnqualified(); }
4855  QualType desugar() const { return getCanonicalTypeInternal(); }
4856 
4857  /// Get the type deduced for this placeholder type, or null if it's
4858  /// either not been deduced or was deduced to a dependent type.
4860  return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType();
4861  }
4862  bool isDeduced() const {
4863  return !isCanonicalUnqualified() || isDependentType();
4864  }
4865 
4866  static bool classof(const Type *T) {
4867  return T->getTypeClass() == Auto ||
4868  T->getTypeClass() == DeducedTemplateSpecialization;
4869  }
4870 };
4871 
4872 /// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained
4873 /// by a type-constraint.
4874 class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode {
4875  friend class ASTContext; // ASTContext creates these
4876 
4877  ConceptDecl *TypeConstraintConcept;
4878 
4879  AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword,
4880  bool IsDeducedAsDependent, bool IsDeducedAsPack, ConceptDecl *CD,
4881  ArrayRef<TemplateArgument> TypeConstraintArgs);
4882 
4883  const TemplateArgument *getArgBuffer() const {
4884  return reinterpret_cast<const TemplateArgument*>(this+1);
4885  }
4886 
4887  TemplateArgument *getArgBuffer() {
4888  return reinterpret_cast<TemplateArgument*>(this+1);
4889  }
4890 
4891 public:
4892  /// Retrieve the template arguments.
4893  const TemplateArgument *getArgs() const {
4894  return getArgBuffer();
4895  }
4896 
4897  /// Retrieve the number of template arguments.
4898  unsigned getNumArgs() const {
4899  return AutoTypeBits.NumArgs;
4900  }
4901 
4902  const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
4903 
4905  return {getArgs(), getNumArgs()};
4906  }
4907 
4909  return TypeConstraintConcept;
4910  }
4911 
4912  bool isConstrained() const {
4913  return TypeConstraintConcept != nullptr;
4914  }
4915 
4916  bool isDecltypeAuto() const {
4917  return getKeyword() == AutoTypeKeyword::DecltypeAuto;
4918  }
4919 
4921  return (AutoTypeKeyword)AutoTypeBits.Keyword;
4922  }
4923 
4924  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
4925  Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(),
4926  getTypeConstraintConcept(), getTypeConstraintArguments());
4927  }
4928 
4929  static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
4930  QualType Deduced, AutoTypeKeyword Keyword,
4931  bool IsDependent, ConceptDecl *CD,
4932  ArrayRef<TemplateArgument> Arguments);
4933 
4934  static bool classof(const Type *T) {
4935  return T->getTypeClass() == Auto;
4936  }
4937 };
4938 
4939 /// Represents a C++17 deduced template specialization type.
4941  public llvm::FoldingSetNode {
4942  friend class ASTContext; // ASTContext creates these
4943 
4944  /// The name of the template whose arguments will be deduced.
4945  TemplateName Template;
4946 
4948  QualType DeducedAsType,
4949  bool IsDeducedAsDependent)
4950  : DeducedType(DeducedTemplateSpecialization, DeducedAsType,
4951  IsDeducedAsDependent || Template.isDependent(),
4952  IsDeducedAsDependent || Template.isInstantiationDependent(),
4953  Template.containsUnexpandedParameterPack()),
4954  Template(Template) {}
4955 
4956 public:
4957  /// Retrieve the name of the template that we are deducing.
4958  TemplateName getTemplateName() const { return Template;}
4959 
4960  void Profile(llvm::FoldingSetNodeID &ID) {
4961  Profile(ID, getTemplateName(), getDeducedType(), isDependentType());
4962  }
4963 
4964  static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template,
4965  QualType Deduced, bool IsDependent) {
4966  Template.Profile(ID);
4967  ID.AddPointer(Deduced.getAsOpaquePtr());
4968  ID.AddBoolean(IsDependent);
4969  }
4970 
4971  static bool classof(const Type *T) {
4972  return T->getTypeClass() == DeducedTemplateSpecialization;
4973  }
4974 };
4975 
4976 /// Represents a type template specialization; the template
4977 /// must be a class template, a type alias template, or a template
4978 /// template parameter. A template which cannot be resolved to one of
4979 /// these, e.g. because it is written with a dependent scope
4980 /// specifier, is instead represented as a
4981 /// @c DependentTemplateSpecializationType.
4982 ///
4983 /// A non-dependent template specialization type is always "sugar",
4984 /// typically for a \c RecordType. For example, a class template
4985 /// specialization type of \c vector<int> will refer to a tag type for
4986 /// the instantiation \c std::vector<int, std::allocator<int>>
4987 ///
4988 /// Template specializations are dependent if either the template or
4989 /// any of the template arguments are dependent, in which case the
4990 /// type may also be canonical.
4991 ///
4992 /// Instances of this type are allocated with a trailing array of
4993 /// TemplateArguments, followed by a QualType representing the
4994 /// non-canonical aliased type when the template is a type alias
4995 /// template.
4997  : public Type,
4998  public llvm::FoldingSetNode {
4999  friend class ASTContext; // ASTContext creates these
5000 
5001  /// The name of the template being specialized. This is
5002  /// either a TemplateName::Template (in which case it is a
5003  /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a
5004  /// TypeAliasTemplateDecl*), a
5005  /// TemplateName::SubstTemplateTemplateParmPack, or a
5006  /// TemplateName::SubstTemplateTemplateParm (in which case the
5007  /// replacement must, recursively, be one of these).
5008  TemplateName Template;
5009 
5012  QualType Canon,
5013  QualType Aliased);
5014 
5015 public:
5016  /// Determine whether any of the given template arguments are dependent.
5017  static bool anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
5018  bool &InstantiationDependent);
5019 
5020  static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &,
5021  bool &InstantiationDependent);
5022 
5023  /// True if this template specialization type matches a current
5024  /// instantiation in the context in which it is found.
5025  bool isCurrentInstantiation() const {
5026  return isa<InjectedClassNameType>(getCanonicalTypeInternal());
5027  }
5028 
5029  /// Determine if this template specialization type is for a type alias
5030  /// template that has been substituted.
5031  ///
5032  /// Nearly every template specialization type whose template is an alias
5033  /// template will be substituted. However, this is not the case when
5034  /// the specialization contains a pack expansion but the template alias
5035  /// does not have a corresponding parameter pack, e.g.,
5036  ///
5037  /// \code
5038  /// template<typename T, typename U, typename V> struct S;
5039  /// template<typename T, typename U> using A = S<T, int, U>;
5040  /// template<typename... Ts> struct X {
5041  /// typedef A<Ts...> type; // not a type alias
5042  /// };
5043  /// \endcode
5044  bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; }
5045 
5046  /// Get the aliased type, if this is a specialization of a type alias
5047  /// template.
5049  assert(isTypeAlias() && "not a type alias template specialization");
5050  return *reinterpret_cast<const QualType*>(end());
5051  }
5052 
5053  using iterator = const TemplateArgument *;
5054 
5055  iterator begin() const { return getArgs(); }
5056  iterator end() const; // defined inline in TemplateBase.h
5057 
5058  /// Retrieve the name of the template that we are specializing.
5059  TemplateName getTemplateName() const { return Template; }
5060 
5061  /// Retrieve the template arguments.
5062  const TemplateArgument *getArgs() const {
5063  return reinterpret_cast<const TemplateArgument *>(this + 1);
5064  }
5065 
5066  /// Retrieve the number of template arguments.
5067  unsigned getNumArgs() const {
5068  return TemplateSpecializationTypeBits.NumArgs;
5069  }
5070 
5071  /// Retrieve a specific template argument as a type.
5072  /// \pre \c isArgType(Arg)
5073  const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
5074 
5076  return {getArgs(), getNumArgs()};
5077  }
5078 
5079  bool isSugared() const {
5080  return !isDependentType() || isCurrentInstantiation() || isTypeAlias();
5081  }
5082 
5083  QualType desugar() const {
5084  return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal();
5085  }
5086 
5087  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
5088  Profile(ID, Template, template_arguments(), Ctx);
5089  if (isTypeAlias())
5090  getAliasedType().Profile(ID);
5091  }
5092 
5093  static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T,
5095  const ASTContext &Context);
5096 
5097  static bool classof(const Type *T) {
5098  return T->getTypeClass() == TemplateSpecialization;
5099  }
5100 };
5101 
5102 /// Print a template argument list, including the '<' and '>'
5103 /// enclosing the template arguments.
5104 void printTemplateArgumentList(raw_ostream &OS,
5106  const PrintingPolicy &Policy);
5107 
5108 void printTemplateArgumentList(raw_ostream &OS,
5110  const PrintingPolicy &Policy);
5111 
5112 void printTemplateArgumentList(raw_ostream &OS,
5113  const TemplateArgumentListInfo &Args,
5114  const PrintingPolicy &Policy);
5115 
5116 /// The injected class name of a C++ class template or class
5117 /// template partial specialization. Used to record that a type was
5118 /// spelled with a bare identifier rather than as a template-id; the
5119 /// equivalent for non-templated classes is just RecordType.
5120 ///
5121 /// Injected class name types are always dependent. Template
5122 /// instantiation turns these into RecordTypes.
5123 ///
5124 /// Injected class name types are always canonical. This works
5125 /// because it is impossible to compare an injected class name type
5126 /// with the corresponding non-injected template type, for the same
5127 /// reason that it is impossible to directly compare template
5128 /// parameters from different dependent contexts: injected class name
5129 /// types can only occur within the scope of a particular templated
5130 /// declaration, and within that scope every template specialization
5131 /// will canonicalize to the injected class name (when appropriate
5132 /// according to the rules of the language).
5133 class InjectedClassNameType : public Type {
5134  friend class ASTContext; // ASTContext creates these.
5135  friend class ASTNodeImporter;
5136  friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not
5137  // currently suitable for AST reading, too much
5138  // interdependencies.
5139  template <class T> friend class serialization::AbstractTypeReader;
5140 
5142 
5143  /// The template specialization which this type represents.
5144  /// For example, in
5145  /// template <class T> class A { ... };
5146  /// this is A<T>, whereas in
5147  /// template <class X, class Y> class A<B<X,Y> > { ... };
5148  /// this is A<B<X,Y> >.
5149  ///
5150  /// It is always unqualified, always a template specialization type,
5151  /// and always dependent.
5152  QualType InjectedType;
5153 
5155  : Type(InjectedClassName, QualType(), /*Dependent=*/true,
5156  /*InstantiationDependent=*/true,
5157  /*VariablyModified=*/false,
5158  /*ContainsUnexpandedParameterPack=*/false),
5159  Decl(D), InjectedType(TST) {
5160  assert(isa<TemplateSpecializationType>(TST));
5161  assert(!TST.hasQualifiers());
5162  assert(TST->isDependentType());
5163  }
5164 
5165 public:
5166  QualType getInjectedSpecializationType() const { return InjectedType; }
5167 
5169  return cast<TemplateSpecializationType>(InjectedType.getTypePtr());
5170  }
5171 
5173  return getInjectedTST()->getTemplateName();
5174  }
5175 
5176  CXXRecordDecl *getDecl() const;
5177 
5178  bool isSugared() const { return false; }
5179  QualType desugar() const { return QualType(this, 0); }
5180 
5181  static bool classof(const Type *T) {
5182  return T->getTypeClass() == InjectedClassName;
5183  }
5184 };
5185 
5186 /// The kind of a tag type.
5188  /// The "struct" keyword.
5190 
5191  /// The "__interface" keyword.
5193 
5194  /// The "union" keyword.
5196 
5197  /// The "class" keyword.
5199 
5200  /// The "enum" keyword.
5202 };
5203 
5204 /// The elaboration keyword that precedes a qualified type name or
5205 /// introduces an elaborated-type-specifier.
5207  /// The "struct" keyword introduces the elaborated-type-specifier.
5209 
5210  /// The "__interface" keyword introduces the elaborated-type-specifier.
5212 
5213  /// The "union" keyword introduces the elaborated-type-specifier.
5215 
5216  /// The "class" keyword introduces the elaborated-type-specifier.
5218 
5219  /// The "enum" keyword introduces the elaborated-type-specifier.
5221 
5222  /// The "typename" keyword precedes the qualified type name, e.g.,
5223  /// \c typename T::type.
5225 
5226  /// No keyword precedes the qualified type name.
5228 };
5229 
5230 /// A helper class for Type nodes having an ElaboratedTypeKeyword.
5231 /// The keyword in stored in the free bits of the base class.
5232 /// Also provides a few static helpers for converting and printing
5233 /// elaborated type keyword and tag type kind enumerations.
5234 class TypeWithKeyword : public Type {
5235 protected:
5237  QualType Canonical, bool Dependent,
5238  bool InstantiationDependent, bool VariablyModified,
5239  bool ContainsUnexpandedParameterPack)
5240  : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
5241  ContainsUnexpandedParameterPack) {
5242  TypeWithKeywordBits.Keyword = Keyword;
5243  }
5244 
5245 public:
5247  return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword);
5248  }
5249 
5250  /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword.
5251  static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec);
5252 
5253  /// Converts a type specifier (DeclSpec::TST) into a tag type kind.
5254  /// It is an error to provide a type specifier which *isn't* a tag kind here.
5255  static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec);
5256 
5257  /// Converts a TagTypeKind into an elaborated type keyword.
5258  static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag);
5259 
5260  /// Converts an elaborated type keyword into a TagTypeKind.
5261  /// It is an error to provide an elaborated type keyword
5262  /// which *isn't* a tag kind here.
5263  static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword);
5264 
5265  static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword);
5266 
5267  static StringRef getKeywordName(ElaboratedTypeKeyword Keyword);
5268 
5270  return getKeywordName(getKeywordForTagTypeKind(Kind));
5271  }
5272 
5274  static CannotCastToThisType classof(const Type *);
5275 };
5276 
5277 /// Represents a type that was referred to using an elaborated type
5278 /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type,
5279 /// or both.
5280 ///
5281 /// This type is used to keep track of a type name as written in the
5282 /// source code, including tag keywords and any nested-name-specifiers.
5283 /// The type itself is always "sugar", used to express what was written
5284 /// in the source code but containing no additional semantic information.
5285 class ElaboratedType final
5286  : public TypeWithKeyword,
5287  public llvm::FoldingSetNode,
5288  private llvm::TrailingObjects<ElaboratedType, TagDecl *> {
5289  friend class ASTContext; // ASTContext creates these
5290  friend TrailingObjects;
5291 
5292  /// The nested name specifier containing the qualifier.
5293  NestedNameSpecifier *NNS;
5294 
5295  /// The type that this qualified name refers to.
5296  QualType NamedType;
5297 
5298  /// The (re)declaration of this tag type owned by this occurrence is stored
5299  /// as a trailing object if there is one. Use getOwnedTagDecl to obtain
5300  /// it, or obtain a null pointer if there is none.
5301 
5303  QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl)
5304  : TypeWithKeyword(Keyword, Elaborated, CanonType,
5305  NamedType->isDependentType(),
5306  NamedType->isInstantiationDependentType(),
5307  NamedType->isVariablyModifiedType(),
5308  NamedType->containsUnexpandedParameterPack()),
5309  NNS(NNS), NamedType(NamedType) {
5310  ElaboratedTypeBits.HasOwnedTagDecl = false;
5311  if (OwnedTagDecl) {
5312  ElaboratedTypeBits.HasOwnedTagDecl = true;
5313  *getTrailingObjects<TagDecl *>() = OwnedTagDecl;
5314  }
5315  assert(!(Keyword == ETK_None && NNS == nullptr) &&
5316  "ElaboratedType cannot have elaborated type keyword "
5317  "and name qualifier both null.");
5318  }
5319 
5320 public:
5321  /// Retrieve the qualification on this type.
5322  NestedNameSpecifier *getQualifier() const { return NNS; }
5323 
5324  /// Retrieve the type named by the qualified-id.
5325  QualType getNamedType() const { return NamedType; }
5326 
5327  /// Remove a single level of sugar.
5328  QualType desugar() const { return getNamedType(); }
5329 
5330  /// Returns whether this type directly provides sugar.
5331  bool isSugared() const { return true; }
5332 
5333  /// Return the (re)declaration of this type owned by this occurrence of this
5334  /// type, or nullptr if there is none.
5336  return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>()
5337  : nullptr;
5338  }
5339 
5340  void Profile(llvm::FoldingSetNodeID &ID) {
5341  Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl());
5342  }
5343 
5344  static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
5345  NestedNameSpecifier *NNS, QualType NamedType,
5346  TagDecl *OwnedTagDecl) {
5347  ID.AddInteger(Keyword);
5348  ID.AddPointer(NNS);
5349  NamedType.Profile(ID);
5350  ID.AddPointer(OwnedTagDecl);
5351  }
5352 
5353  static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; }
5354 };
5355 
5356 /// Represents a qualified type name for which the type name is
5357 /// dependent.
5358 ///
5359 /// DependentNameType represents a class of dependent types that involve a
5360 /// possibly dependent nested-name-specifier (e.g., "T::") followed by a
5361 /// name of a type. The DependentNameType may start with a "typename" (for a
5362 /// typename-specifier), "class", "struct", "union", or "enum" (for a
5363 /// dependent elaborated-type-specifier), or nothing (in contexts where we
5364 /// know that we must be referring to a type, e.g., in a base class specifier).
5365 /// Typically the nested-name-specifier is dependent, but in MSVC compatibility
5366 /// mode, this type is used with non-dependent names to delay name lookup until
5367 /// instantiation.
5368 class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
5369  friend class ASTContext; // ASTContext creates these
5370 
5371  /// The nested name specifier containing the qualifier.
5372  NestedNameSpecifier *NNS;
5373 
5374  /// The type that this typename specifier refers to.
5375  const IdentifierInfo *Name;
5376 
5378  const IdentifierInfo *Name, QualType CanonType)
5379  : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true,
5380  /*InstantiationDependent=*/true,
5381  /*VariablyModified=*/false,
5382  NNS->containsUnexpandedParameterPack()),
5383  NNS(NNS), Name(Name) {}
5384 
5385 public:
5386  /// Retrieve the qualification on this type.
5387  NestedNameSpecifier *getQualifier() const { return NNS; }
5388 
5389  /// Retrieve the type named by the typename specifier as an identifier.
5390  ///
5391  /// This routine will return a non-NULL identifier pointer when the
5392  /// form of the original typename was terminated by an identifier,
5393  /// e.g., "typename T::type".
5395  return Name;
5396  }
5397 
5398  bool isSugared() const { return false; }
5399  QualType desugar() const { return QualType(this, 0); }
5400 
5401  void Profile(llvm::FoldingSetNodeID &ID) {
5402  Profile(ID, getKeyword(), NNS, Name);
5403  }
5404 
5405  static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
5406  NestedNameSpecifier *NNS, const IdentifierInfo *Name) {
5407  ID.AddInteger(Keyword);
5408  ID.AddPointer(NNS);
5409  ID.AddPointer(Name);
5410  }
5411 
5412  static bool classof(const Type *T) {
5413  return T->getTypeClass() == DependentName;
5414  }
5415 };
5416 
5417 /// Represents a template specialization type whose template cannot be
5418 /// resolved, e.g.
5419 /// A<T>::template B<T>
5421  : public TypeWithKeyword,
5422  public llvm::FoldingSetNode {
5423  friend class ASTContext; // ASTContext creates these
5424 
5425  /// The nested name specifier containing the qualifier.
5426  NestedNameSpecifier *NNS;
5427 
5428  /// The identifier of the template.
5429  const IdentifierInfo *Name;
5430 
5432  NestedNameSpecifier *NNS,
5433  const IdentifierInfo *Name,
5435  QualType Canon);
5436 
5437  const TemplateArgument *getArgBuffer() const {
5438  return reinterpret_cast<const TemplateArgument*>(this+1);
5439  }
5440 
5441  TemplateArgument *getArgBuffer() {
5442  return reinterpret_cast<TemplateArgument*>(this+1);
5443  }
5444 
5445 public:
5446  NestedNameSpecifier *getQualifier() const { return NNS; }
5447  const IdentifierInfo *getIdentifier() const { return Name; }
5448 
5449  /// Retrieve the template arguments.
5450  const TemplateArgument *getArgs() const {
5451  return getArgBuffer();
5452  }
5453 
5454  /// Retrieve the number of template arguments.
5455  unsigned getNumArgs() const {
5456  return DependentTemplateSpecializationTypeBits.NumArgs;
5457  }
5458 
5459  const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
5460 
5462  return {getArgs(), getNumArgs()};
5463  }
5464 
5465  using iterator = const TemplateArgument *;
5466 
5467  iterator begin() const { return getArgs(); }
5468  iterator end() const; // inline in TemplateBase.h
5469 
5470  bool isSugared() const { return false; }
5471  QualType desugar() const { return QualType(this, 0); }
5472 
5473  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
5474  Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()});
5475  }
5476 
5477  static void Profile(llvm::FoldingSetNodeID &ID,
5478  const ASTContext &Context,
5479  ElaboratedTypeKeyword Keyword,
5480  NestedNameSpecifier *Qualifier,
5481  const IdentifierInfo *Name,
5483 
5484  static bool classof(const Type *T) {
5485  return T->getTypeClass() == DependentTemplateSpecialization;
5486  }
5487 };
5488 
5489 /// Represents a pack expansion of types.
5490 ///
5491 /// Pack expansions are part of C++11 variadic templates. A pack
5492 /// expansion contains a pattern, which itself contains one or more
5493 /// "unexpanded" parameter packs. When instantiated, a pack expansion
5494 /// produces a series of types, each instantiated from the pattern of
5495 /// the expansion, where the Ith instantiation of the pattern uses the
5496 /// Ith arguments bound to each of the unexpanded parameter packs. The
5497 /// pack expansion is considered to "expand" these unexpanded
5498 /// parameter packs.
5499 ///
5500 /// \code
5501 /// template<typename ...Types> struct tuple;
5502 ///
5503 /// template<typename ...Types>
5504 /// struct tuple_of_references {
5505 /// typedef tuple<Types&...> type;
5506 /// };
5507 /// \endcode
5508 ///
5509 /// Here, the pack expansion \c Types&... is represented via a
5510 /// PackExpansionType whose pattern is Types&.
5511 class PackExpansionType : public Type, public llvm::FoldingSetNode {
5512  friend class ASTContext; // ASTContext creates these
5513 
5514  /// The pattern of the pack expansion.
5515  QualType Pattern;
5516 
5517  PackExpansionType(QualType Pattern, QualType Canon,
5518  Optional<unsigned> NumExpansions)
5519  : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(),
5520  /*InstantiationDependent=*/true,
5521  /*VariablyModified=*/Pattern->isVariablyModifiedType(),
5522  /*ContainsUnexpandedParameterPack=*/false),
5523  Pattern(Pattern) {
5524  PackExpansionTypeBits.NumExpansions =
5525  NumExpansions ? *NumExpansions + 1 : 0;
5526  }
5527 
5528 public:
5529  /// Retrieve the pattern of this pack expansion, which is the
5530  /// type that will be repeatedly instantiated when instantiating the
5531  /// pack expansion itself.
5532  QualType getPattern() const { return Pattern; }
5533 
5534  /// Retrieve the number of expansions that this pack expansion will
5535  /// generate, if known.
5537  if (PackExpansionTypeBits.NumExpansions)
5538  return PackExpansionTypeBits.NumExpansions - 1;
5539  return None;
5540  }
5541 
5542  bool isSugared() const { return !Pattern->isDependentType(); }
5543  QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); }
5544 
5545  void Profile(llvm::FoldingSetNodeID &ID) {
5546  Profile(ID, getPattern(), getNumExpansions());
5547  }
5548 
5549  static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
5550  Optional<unsigned> NumExpansions) {
5551  ID.AddPointer(Pattern.getAsOpaquePtr());
5552  ID.AddBoolean(NumExpansions.hasValue());
5553  if (NumExpansions)
5554  ID.AddInteger(*NumExpansions);
5555  }
5556 
5557  static bool classof(const Type *T) {
5558  return T->getTypeClass() == PackExpansion;
5559  }
5560 };
5561 
5562 /// This class wraps the list of protocol qualifiers. For types that can
5563 /// take ObjC protocol qualifers, they can subclass this class.
5564 template <class T>
5566 protected:
5567  ObjCProtocolQualifiers() = default;
5568 
5570  return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage();
5571  }
5572 
5574  return static_cast<T*>(this)->getProtocolStorageImpl();
5575  }
5576 
5577  void setNumProtocols(unsigned N) {
5578  static_cast<T*>(this)->setNumProtocolsImpl(N);
5579  }
5580 
5582  setNumProtocols(protocols.size());
5583  assert(getNumProtocols() == protocols.size() &&
5584  "bitfield overflow in protocol count");
5585  if (!protocols.empty())
5586  memcpy(getProtocolStorage(), protocols.data(),
5587  protocols.size() * sizeof(ObjCProtocolDecl*));
5588  }
5589 
5590 public:
5591  using qual_iterator = ObjCProtocolDecl * const *;
5592  using qual_range = llvm::iterator_range<qual_iterator>;
5593 
5594  qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
5595  qual_iterator qual_begin() const { return getProtocolStorage(); }
5596  qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }
5597 
5598  bool qual_empty() const { return getNumProtocols() == 0; }
5599 
5600  /// Return the number of qualifying protocols in this type, or 0 if
5601  /// there are none.
5602  unsigned getNumProtocols() const {
5603  return static_cast<const T*>(this)->getNumProtocolsImpl();
5604  }
5605 
5606  /// Fetch a protocol by index.
5607  ObjCProtocolDecl *getProtocol(unsigned I) const {
5608  assert(I < getNumProtocols() && "Out-of-range protocol access");
5609  return qual_begin()[I];
5610  }
5611 
5612  /// Retrieve all of the protocol qualifiers.
5614  return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());
5615  }
5616 };
5617 
5618 /// Represents a type parameter type in Objective C. It can take
5619 /// a list of protocols.
5620 class ObjCTypeParamType : public Type,
5621  public ObjCProtocolQualifiers<ObjCTypeParamType>,
5622  public llvm::FoldingSetNode {
5623  friend class ASTContext;
5625 
5626  /// The number of protocols stored on this type.
5627  unsigned NumProtocols : 6;
5628 
5629  ObjCTypeParamDecl *OTPDecl;
5630 
5631  /// The protocols are stored after the ObjCTypeParamType node. In the
5632  /// canonical type, the list of protocols are sorted alphabetically
5633  /// and uniqued.
5634  ObjCProtocolDecl **getProtocolStorageImpl();
5635 
5636  /// Return the number of qualifying protocols in this interface type,
5637  /// or 0 if there are none.
5638  unsigned getNumProtocolsImpl() const {
5639  return NumProtocols;
5640  }
5641 
5642  void setNumProtocolsImpl(unsigned N) {
5643  NumProtocols = N;
5644  }
5645 
5647  QualType can,
5648  ArrayRef<ObjCProtocolDecl *> protocols);
5649 
5650 public:
5651  bool isSugared() const { return true; }
5652  QualType desugar() const { return getCanonicalTypeInternal(); }
5653 
5654  static bool classof(const Type *T) {
5655  return T->getTypeClass() == ObjCTypeParam;
5656  }
5657 
5658  void Profile(llvm::FoldingSetNodeID &ID);
5659  static void Profile(llvm::FoldingSetNodeID &ID,
5660  const ObjCTypeParamDecl *OTPDecl,
5661  ArrayRef<ObjCProtocolDecl *> protocols);
5662 
5663  ObjCTypeParamDecl *getDecl() const { return OTPDecl; }
5664 };
5665 
5666 /// Represents a class type in Objective C.
5667 ///
5668 /// Every Objective C type is a combination of a base type, a set of
5669 /// type arguments (optional, for parameterized classes) and a list of
5670 /// protocols.
5671 ///
5672 /// Given the following declarations:
5673 /// \code
5674 /// \@class C<T>;
5675 /// \@protocol P;
5676 /// \endcode
5677 ///
5678 /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType
5679 /// with base C and no protocols.
5680 ///
5681 /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P].
5682 /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no
5683 /// protocol list.
5684 /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*',
5685 /// and protocol list [P].
5686 ///
5687 /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose
5688 /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType
5689 /// and no protocols.
5690 ///
5691 /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType
5692 /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually
5693 /// this should get its own sugar class to better represent the source.
5694 class ObjCObjectType : public Type,
5695  public ObjCProtocolQualifiers<ObjCObjectType> {
5697 
5698  // ObjCObjectType.NumTypeArgs - the number of type arguments stored
5699  // after the ObjCObjectPointerType node.
5700  // ObjCObjectType.NumProtocols - the number of protocols stored
5701  // after the type arguments of ObjCObjectPointerType node.
5702  //
5703  // These protocols are those written directly on the type. If
5704  // protocol qualifiers ever become additive, the iterators will need
5705  // to get kindof complicated.
5706  //
5707  // In the canonical object type, these are sorted alphabetically
5708  // and uniqued.
5709 
5710  /// Either a BuiltinType or an InterfaceType or sugar for either.
5711  QualType BaseType;
5712 
5713  /// Cached superclass type.
5714  mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool>
5715  CachedSuperClassType;
5716 
5717  QualType *getTypeArgStorage();
5718  const QualType *getTypeArgStorage() const {
5719  return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();
5720  }
5721 
5722  ObjCProtocolDecl **getProtocolStorageImpl();
5723  /// Return the number of qualifying protocols in this interface type,
5724  /// or 0 if there are none.
5725  unsigned getNumProtocolsImpl() const {
5726  return ObjCObjectTypeBits.NumProtocols;
5727  }
5728  void setNumProtocolsImpl(unsigned N) {
5729  ObjCObjectTypeBits.NumProtocols = N;
5730  }
5731 
5732 protected:
5734 
5735  ObjCObjectType(QualType Canonical, QualType Base,
5736  ArrayRef<QualType> typeArgs,
5737  ArrayRef<ObjCProtocolDecl *> protocols,
5738  bool isKindOf);
5739 
5741  : Type(ObjCInterface, QualType(), false, false, false, false),
5742  BaseType(QualType(this_(), 0)) {
5743  ObjCObjectTypeBits.NumProtocols = 0;
5744  ObjCObjectTypeBits.NumTypeArgs = 0;
5745  ObjCObjectTypeBits.IsKindOf = 0;
5746  }
5747 
5748  void computeSuperClassTypeSlow() const;
5749 
5750 public:
5751  /// Gets the base type of this object type. This is always (possibly
5752  /// sugar for) one of:
5753  /// - the 'id' builtin type (as opposed to the 'id' type visible to the
5754  /// user, which is a typedef for an ObjCObjectPointerType)
5755  /// - the 'Class' builtin type (same caveat)
5756  /// - an ObjCObjectType (currently always an ObjCInterfaceType)
5757  QualType getBaseType() const { return BaseType; }
5758 
5759  bool isObjCId() const {
5760  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId);
5761  }
5762 
5763  bool isObjCClass() const {
5764  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass);
5765  }
5766 
5767  bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); }
5768  bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); }
5770  if (!qual_empty()) return false;
5771  if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>())
5772  return T->getKind() == BuiltinType::ObjCId ||
5773  T->getKind() == BuiltinType::ObjCClass;
5774  return false;
5775  }
5776  bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); }
5777  bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); }
5778 
5779  /// Gets the interface declaration for this object type, if the base type
5780  /// really is an interface.
5781  ObjCInterfaceDecl *getInterface() const;
5782 
5783  /// Determine whether this object type is "specialized", meaning
5784  /// that it has type arguments.
5785  bool isSpecialized() const;
5786 
5787  /// Determine whether this object type was written with type arguments.
5788  bool isSpecializedAsWritten() const {
5789  return ObjCObjectTypeBits.NumTypeArgs > 0;
5790  }
5791 
5792  /// Determine whether this object type is "unspecialized", meaning
5793  /// that it has no type arguments.
5794  bool isUnspecialized() const { return !isSpecialized(); }
5795 
5796  /// Determine whether this object type is "unspecialized" as
5797  /// written, meaning that it has no type arguments.
5798  bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }
5799 
5800  /// Retrieve the type arguments of this object type (semantically).
5801  ArrayRef<QualType> getTypeArgs() const;
5802 
5803  /// Retrieve the type arguments of this object type as they were
5804  /// written.
5806  return llvm::makeArrayRef(getTypeArgStorage(),
5807  ObjCObjectTypeBits.NumTypeArgs);
5808  }
5809 
5810  /// Whether this is a "__kindof" type as written.
5811  bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }
5812 
5813  /// Whether this ia a "__kindof" type (semantically).
5814  bool isKindOfType() const;
5815 
5816  /// Retrieve the type of the superclass of this object type.
5817  ///
5818  /// This operation substitutes any type arguments into the
5819  /// superclass of the current class type, potentially producing a
5820  /// specialization of the superclass type. Produces a null type if
5821  /// there is no superclass.
5823  if (!CachedSuperClassType.getInt())
5824  computeSuperClassTypeSlow();
5825 
5826  assert(CachedSuperClassType.getInt() && "Superclass not set?");
5827  return QualType(CachedSuperClassType.getPointer(), 0);
5828  }
5829 
5830  /// Strip off the Objective-C "kindof" type and (with it) any
5831  /// protocol qualifiers.
5832  QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const;
5833 
5834  bool isSugared() const { return false; }
5835  QualType desugar() const { return QualType(this, 0); }
5836 
5837  static bool classof(const Type *T) {
5838  return T->getTypeClass() == ObjCObject ||
5839  T->getTypeClass() == ObjCInterface;
5840  }
5841 };
5842 
5843 /// A class providing a concrete implementation
5844 /// of ObjCObjectType, so as to not increase the footprint of
5845 /// ObjCInterfaceType. Code outside of ASTContext and the core type
5846 /// system should not reference this type.
5847 class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode {
5848  friend class ASTContext;
5849 
5850  // If anyone adds fields here, ObjCObjectType::getProtocolStorage()
5851  // will need to be modified.
5852 
5854  ArrayRef<QualType> typeArgs,
5855  ArrayRef<ObjCProtocolDecl *> protocols,
5856  bool isKindOf)
5857  : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {}
5858 
5859 public:
5860  void Profile(llvm::FoldingSetNodeID &ID);
5861  static void Profile(llvm::FoldingSetNodeID &ID,
5862  QualType Base,
5863  ArrayRef<QualType> typeArgs,
5864  ArrayRef<ObjCProtocolDecl *> protocols,
5865  bool isKindOf);
5866 };
5867 
5868 inline QualType *ObjCObjectType::getTypeArgStorage() {
5869  return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1);
5870 }
5871 
5872 inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() {
5873  return reinterpret_cast<ObjCProtocolDecl**>(
5874  getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs);
5875 }
5876 
5877 inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() {
5878  return reinterpret_cast<ObjCProtocolDecl**>(
5879  static_cast<ObjCTypeParamType*>(this)+1);
5880 }
5881 
5882 /// Interfaces are the core concept in Objective-C for object oriented design.
5883 /// They basically correspond to C++ classes. There are two kinds of interface
5884 /// types: normal interfaces like `NSString`, and qualified interfaces, which
5885 /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`.
5886 ///
5887 /// ObjCInterfaceType guarantees the following properties when considered
5888 /// as a subtype of its superclass, ObjCObjectType:
5889 /// - There are no protocol qualifiers. To reinforce this, code which
5890 /// tries to invoke the protocol methods via an ObjCInterfaceType will
5891 /// fail to compile.
5892 /// - It is its own base type. That is, if T is an ObjCInterfaceType*,
5893 /// T->getBaseType() == QualType(T, 0).
5895  friend class ASTContext; // ASTContext creates these.
5896  friend class ASTReader;
5897  friend class ObjCInterfaceDecl;
5898  template <class T> friend class serialization::AbstractTypeReader;
5899 
5900  mutable ObjCInterfaceDecl *Decl;
5901 
5904  Decl(const_cast<ObjCInterfaceDecl*>(D)) {}
5905 
5906 public:
5907  /// Get the declaration of this interface.
5908  ObjCInterfaceDecl *getDecl() const { return Decl; }
5909 
5910  bool isSugared() const { return false; }
5911  QualType desugar() const { return QualType(this, 0); }
5912 
5913  static bool classof(const Type *T) {
5914  return T->getTypeClass() == ObjCInterface;
5915  }
5916 
5917  // Nonsense to "hide" certain members of ObjCObjectType within this
5918  // class. People asking for protocols on an ObjCInterfaceType are
5919  // not going to get what they want: ObjCInterfaceTypes are
5920  // guaranteed to have no protocols.
5921  enum {
5926  getProtocol
5927  };
5928 };
5929 
5931  QualType baseType = getBaseType();
5932  while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) {
5933  if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT))
5934  return T->getDecl();
5935 
5936  baseType = ObjT->getBaseType();
5937  }
5938 
5939  return nullptr;
5940 }
5941 
5942 /// Represents a pointer to an Objective C object.
5943 ///
5944 /// These are constructed from pointer declarators when the pointee type is
5945 /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class'
5946 /// types are typedefs for these, and the protocol-qualified types 'id<P>'
5947 /// and 'Class<P>' are translated into these.
5948 ///
5949 /// Pointers to pointers to Objective C objects are still PointerTypes;
5950 /// only the first level of pointer gets it own type implementation.
5951 class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode {
5952  friend class ASTContext; // ASTContext creates these.
5953 
5954  QualType PointeeType;
5955 
5956  ObjCObjectPointerType(QualType Canonical, QualType Pointee)
5957  : Type(ObjCObjectPointer, Canonical,
5958  Pointee->isDependentType(),
5959  Pointee->isInstantiationDependentType(),
5960  Pointee->isVariablyModifiedType(),
5961  Pointee->containsUnexpandedParameterPack()),
5962  PointeeType(Pointee) {}
5963 
5964 public:
5965  /// Gets the type pointed to by this ObjC pointer.
5966  /// The result will always be an ObjCObjectType or sugar thereof.
5967  QualType getPointeeType() const { return PointeeType; }
5968 
5969  /// Gets the type pointed to by this ObjC pointer. Always returns non-null.
5970  ///
5971  /// This method is equivalent to getPointeeType() except that
5972  /// it discards any typedefs (or other sugar) between this
5973  /// type and the "outermost" object type. So for:
5974  /// \code
5975  /// \@class A; \@protocol P; \@protocol Q;
5976  /// typedef A<P> AP;
5977  /// typedef A A1;
5978  /// typedef A1<P> A1P;
5979  /// typedef A1P<Q> A1PQ;
5980  /// \endcode
5981  /// For 'A*', getObjectType() will return 'A'.
5982  /// For 'A<P>*', getObjectType() will return 'A<P>'.
5983  /// For 'AP*', getObjectType() will return 'A<P>'.
5984  /// For 'A1*', getObjectType() will return 'A'.
5985  /// For 'A1<P>*', getObjectType() will return 'A1<P>'.
5986  /// For 'A1P*', getObjectType() will return 'A1<P>'.
5987  /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because
5988  /// adding protocols to a protocol-qualified base discards the
5989  /// old qualifiers (for now). But if it didn't, getObjectType()
5990  /// would return 'A1P<Q>' (and we'd have to make iterating over
5991  /// qualifiers more complicated).
5993  return PointeeType->castAs<ObjCObjectType>();
5994  }
5995 
5996  /// If this pointer points to an Objective C
5997  /// \@interface type, gets the type for that interface. Any protocol
5998  /// qualifiers on the interface are ignored.
5999  ///
6000  /// \return null if the base type for this pointer is 'id' or 'Class'
6001  const ObjCInterfaceType *getInterfaceType() const;
6002 
6003  /// If this pointer points to an Objective \@interface
6004  /// type, gets the declaration for that interface.
6005  ///
6006  /// \return null if the base type for this pointer is 'id' or 'Class'
6008  return getObjectType()->getInterface();
6009  }
6010 
6011  /// True if this is equivalent to the 'id' type, i.e. if
6012  /// its object type is the primitive 'id' type with no protocols.
6013  bool isObjCIdType() const {
6014  return getObjectType()->isObjCUnqualifiedId();
6015  }
6016 
6017  /// True if this is equivalent to the 'Class' type,
6018  /// i.e. if its object tive is the primitive 'Class' type with no protocols.
6019  bool isObjCClassType() const {
6020  return getObjectType()->isObjCUnqualifiedClass();
6021  }
6022 
6023  /// True if this is equivalent to the 'id' or 'Class' type,
6024  bool isObjCIdOrClassType() const {
6025  return getObjectType()->isObjCUnqualifiedIdOrClass();
6026  }
6027 
6028  /// True if this is equivalent to 'id<P>' for some non-empty set of
6029  /// protocols.
6030  bool isObjCQualifiedIdType() const {
6031  return getObjectType()->isObjCQualifiedId();
6032  }
6033 
6034  /// True if this is equivalent to 'Class<P>' for some non-empty set of
6035  /// protocols.
6037  return getObjectType()->isObjCQualifiedClass();
6038  }
6039 
6040  /// Whether this is a "__kindof" type.
6041  bool isKindOfType() const { return getObjectType()->isKindOfType(); }
6042 
6043  /// Whether this type is specialized, meaning that it has type arguments.
6044  bool isSpecialized() const { return getObjectType()->isSpecialized(); }
6045 
6046  /// Whether this type is specialized, meaning that it has type arguments.
6047  bool isSpecializedAsWritten() const {
6048  return getObjectType()->isSpecializedAsWritten();
6049  }
6050 
6051  /// Whether this type is unspecialized, meaning that is has no type arguments.
6052  bool isUnspecialized() const { return getObjectType()->isUnspecialized(); }
6053 
6054  /// Determine whether this object type is "unspecialized" as
6055  /// written, meaning that it has no type arguments.
6056  bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }
6057 
6058  /// Retrieve the type arguments for this type.
6060  return getObjectType()->getTypeArgs();
6061  }
6062 
6063  /// Retrieve the type arguments for this type.
6065  return getObjectType()->getTypeArgsAsWritten();
6066  }
6067 
6068  /// An iterator over the qualifiers on the object type. Provided
6069  /// for convenience. This will always iterate over the full set of
6070  /// protocols on a type, not just those provided directly.
6072  using qual_range = llvm::iterator_range<qual_iterator>;
6073 
6074  qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
6075 
6077  return getObjectType()->qual_begin();
6078  }
6079 
6081  return getObjectType()->qual_end();
6082  }
6083 
6084  bool qual_empty() const { return getObjectType()->qual_empty(); }
6085 
6086  /// Return the number of qualifying protocols on the object type.
6087  unsigned getNumProtocols() const {
6088  return getObjectType()->getNumProtocols();
6089  }
6090 
6091  /// Retrieve a qualifying protocol by index on the object type.
6092  ObjCProtocolDecl *getProtocol(unsigned I) const {
6093  return getObjectType()->getProtocol(I);
6094  }
6095 
6096  bool isSugared() const { return false; }
6097  QualType desugar() const { return QualType(this, 0); }
6098 
6099  /// Retrieve the type of the superclass of this object pointer type.
6100  ///
6101  /// This operation substitutes any type arguments into the
6102  /// superclass of the current class type, potentially producing a
6103  /// pointer to a specialization of the superclass type. Produces a
6104  /// null type if there is no superclass.
6105  QualType getSuperClassType() const;
6106 
6107  /// Strip off the Objective-C "kindof" type and (with it) any
6108  /// protocol qualifiers.
6109  const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals(
6110  const ASTContext &ctx) const;
6111 
6112  void Profile(llvm::FoldingSetNodeID &ID) {
6113  Profile(ID, getPointeeType());
6114  }
6115 
6116  static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
6117  ID.AddPointer(T.getAsOpaquePtr());
6118  }
6119 
6120  static bool classof(const Type *T) {
6121  return T->getTypeClass() == ObjCObjectPointer;
6122  }
6123 };
6124 
6125 class AtomicType : public Type, public llvm::FoldingSetNode {
6126  friend class ASTContext; // ASTContext creates these.
6127 
6128  QualType ValueType;
6129 
6130  AtomicType(QualType ValTy, QualType Canonical)
6131  : Type(Atomic, Canonical, ValTy->isDependentType(),
6132  ValTy->isInstantiationDependentType(),
6133  ValTy->isVariablyModifiedType(),
6134  ValTy->containsUnexpandedParameterPack()),
6135  ValueType(ValTy) {}
6136 
6137 public:
6138  /// Gets the type contained by this atomic type, i.e.
6139  /// the type returned by performing an atomic load of this atomic type.
6140  QualType getValueType() const { return ValueType; }
6141 
6142  bool isSugared() const { return false; }
6143  QualType desugar() const { return QualType(this, 0); }
6144 
6145  void Profile(llvm::FoldingSetNodeID &ID) {
6146  Profile(ID, getValueType());
6147  }
6148 
6149  static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
6150  ID.AddPointer(T.getAsOpaquePtr());
6151  }
6152 
6153  static bool classof(const Type *T) {
6154  return T->getTypeClass() == Atomic;
6155  }
6156 };
6157 
6158 /// PipeType - OpenCL20.
6159 class PipeType : public Type, public llvm::FoldingSetNode {
6160  friend class ASTContext; // ASTContext creates these.
6161 
6162  QualType ElementType;
6163  bool isRead;
6164 
6165  PipeType(QualType elemType, QualType CanonicalPtr, bool isRead)
6166  : Type(Pipe, CanonicalPtr, elemType->isDependentType(),
6167  elemType->isInstantiationDependentType(),
6168  elemType->isVariablyModifiedType(),
6169  elemType->containsUnexpandedParameterPack()),
6170  ElementType(elemType), isRead(isRead) {}
6171 
6172 public:
6173  QualType getElementType() const { return ElementType; }
6174 
6175  bool isSugared() const { return false; }
6176 
6177  QualType desugar() const { return QualType(this, 0); }
6178 
6179  void Profile(llvm::FoldingSetNodeID &ID) {
6180  Profile(ID, getElementType(), isReadOnly());
6181  }
6182 
6183  static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) {
6184  ID.AddPointer(T.getAsOpaquePtr());
6185  ID.AddBoolean(isRead);
6186  }
6187 
6188  static bool classof(const Type *T) {
6189  return T->getTypeClass() == Pipe;
6190  }
6191 
6192  bool isReadOnly() const { return isRead; }
6193 };
6194 
6195 /// A qualifier set is used to build a set of qualifiers.
6197 public:
6199 
6200  /// Collect any qualifiers on the given type and return an
6201  /// unqualified type. The qualifiers are assumed to be consistent
6202  /// with those already in the type.
6204  addFastQualifiers(type.getLocalFastQualifiers());
6205  if (!type.hasLocalNonFastQualifiers())
6206  return type.getTypePtrUnsafe();
6207 
6208  const ExtQuals *extQuals = type.getExtQualsUnsafe();
6209  addConsistentQualifiers(extQuals->getQualifiers());
6210  return extQuals->getBaseType();
6211  }
6212 
6213  /// Apply the collected qualifiers to the given type.
6214  QualType apply(const ASTContext &Context, QualType QT) const;
6215 
6216  /// Apply the collected qualifiers to the given type.
6217  QualType apply(const ASTContext &Context, const Type* T) const;
6218 };
6219 
6220 /// A container of type source information.
6221 ///
6222 /// A client can read the relevant info using TypeLoc wrappers, e.g:
6223 /// @code
6224 /// TypeLoc TL = TypeSourceInfo->getTypeLoc();
6225 /// TL.getBeginLoc().print(OS, SrcMgr);
6226 /// @endcode
6227 class alignas(8) TypeSourceInfo {
6228  // Contains a memory block after the class, used for type source information,
6229  // allocated by ASTContext.
6230  friend class ASTContext;
6231 
6232  QualType Ty;
6233 
6234  TypeSourceInfo(QualType ty) : Ty(ty) {}
6235 
6236 public:
6237  /// Return the type wrapped by this type source info.
6238  QualType getType() const { return Ty; }
6239 
6240  /// Return the TypeLoc wrapper for the type source info.
6241  TypeLoc getTypeLoc() const; // implemented in TypeLoc.h
6242 
6243  /// Override the type stored in this TypeSourceInfo. Use with caution!
6244  void overrideType(QualType T) { Ty = T; }
6245 };
6246 
6247 // Inline function definitions.
6248 
6250  SplitQualType desugar =
6251  Ty->getLocallyUnqualifiedSingleStepDesugaredType().split();
6252  desugar.Quals.addConsistentQualifiers(Quals);
6253  return desugar;
6254 }
6255 
6256 inline const Type *QualType::getTypePtr() const {
6257  return getCommonPtr()->BaseType;
6258 }
6259 
6260 inline const Type *QualType::getTypePtrOrNull() const {
6261  return (isNull() ? nullptr : getCommonPtr()->BaseType);
6262 }
6263 
6265  if (!hasLocalNonFastQualifiers())
6266  return SplitQualType(getTypePtrUnsafe(),
6267  Qualifiers::fromFastMask(getLocalFastQualifiers()));
6268 
6269  const ExtQuals *eq = getExtQualsUnsafe();
6270  Qualifiers qs = eq->getQualifiers();
6271  qs.addFastQualifiers(getLocalFastQualifiers());
6272  return SplitQualType(eq->getBaseType(), qs);
6273 }
6274 
6276  Qualifiers Quals;
6277  if (hasLocalNonFastQualifiers())
6278  Quals = getExtQualsUnsafe()->getQualifiers();
6279  Quals.addFastQualifiers(getLocalFastQualifiers());
6280  return Quals;
6281 }
6282 
6284  Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers();
6285  quals.addFastQualifiers(getLocalFastQualifiers());
6286  return quals;
6287 }
6288 
6289 inline unsigned QualType::getCVRQualifiers() const {
6290  unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers();
6291  cvr |= getLocalCVRQualifiers();
6292  return cvr;
6293 }
6294 
6296  QualType canon = getCommonPtr()->CanonicalType;
6297  return canon.withFastQualifiers(getLocalFastQualifiers());
6298 }
6299 
6300 inline bool QualType::isCanonical() const {
6301  return getTypePtr()->isCanonicalUnqualified();
6302 }
6303 
6304 inline bool QualType::isCanonicalAsParam() const {
6305  if (!isCanonical()) return false;
6306  if (hasLocalQualifiers()) return false;
6307 
6308  const Type *T = getTypePtr();
6309  if (T->isVariablyModifiedType() && T->hasSizedVLAType())
6310  return false;
6311 
6312  return !isa<FunctionType>(T) && !isa<ArrayType>(T);
6313 }
6314 
6315 inline bool QualType::isConstQualified() const {
6316  return isLocalConstQualified() ||
6317  getCommonPtr()->CanonicalType.isLocalConstQualified();
6318 }
6319 
6320 inline bool QualType::isRestrictQualified() const {
6321  return isLocalRestrictQualified() ||
6322  getCommonPtr()->CanonicalType.isLocalRestrictQualified();
6323 }
6324 
6325 
6326 inline bool QualType::isVolatileQualified() const {
6327  return isLocalVolatileQualified() ||
6328  getCommonPtr()->CanonicalType.isLocalVolatileQualified();
6329 }
6330 
6331 inline bool QualType::hasQualifiers() const {
6332  return hasLocalQualifiers() ||
6333  getCommonPtr()->CanonicalType.hasLocalQualifiers();
6334 }
6335 
6337  if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
6338  return QualType(getTypePtr(), 0);
6339 
6340  return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0);
6341 }
6342 
6344  if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
6345  return split();
6346 
6347  return getSplitUnqualifiedTypeImpl(*this);
6348 }
6349 
6351  removeLocalFastQualifiers(Qualifiers::Const);
6352 }
6353 
6355  removeLocalFastQualifiers(Qualifiers::Restrict);
6356 }
6357 
6359  removeLocalFastQualifiers(Qualifiers::Volatile);
6360 }
6361 
6362 inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
6363  assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits");
6364  static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
6365  "Fast bits differ from CVR bits!");
6366 
6367  // Fast path: we don't need to touch the slow qualifiers.
6368  removeLocalFastQualifiers(Mask);
6369 }
6370 
6371 /// Check if this type has any address space qualifier.
6372 inline bool QualType::hasAddressSpace() const {
6373  return getQualifiers().hasAddressSpace();
6374 }
6375 
6376 /// Return the address space of this type.
6378  return getQualifiers().getAddressSpace();
6379 }
6380 
6381 /// Return the gc attribute of this type.
6383  return getQualifiers().getObjCGCAttr();
6384 }
6385 
6387  if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
6388  return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD);
6389  return false;
6390 }
6391 
6393  if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
6394  return hasNonTrivialToPrimitiveDestructCUnion(RD);
6395  return false;
6396 }
6397 
6399  if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
6400  return hasNonTrivialToPrimitiveCopyCUnion(RD);
6401  return false;
6402 }
6403 
6405  if (const auto *PT = t.getAs<PointerType>()) {
6406  if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>())
6407  return FT->getExtInfo();
6408  } else if (const auto *FT = t.getAs<FunctionType>())
6409  return FT->getExtInfo();
6410 
6411  return FunctionType::ExtInfo();
6412 }
6413 
6415  return getFunctionExtInfo(*t);
6416 }
6417 
6418 /// Determine whether this type is more
6419 /// qualified than the Other type. For example, "const volatile int"
6420 /// is more qualified than "const int", "volatile int", and
6421 /// "int". However, it is not more qualified than "const volatile
6422 /// int".
6423 inline bool QualType::isMoreQualifiedThan(QualType other) const {
6424  Qualifiers MyQuals = getQualifiers();
6425  Qualifiers OtherQuals = other.getQualifiers();
6426  return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals));
6427 }
6428 
6429 /// Determine whether this type is at last
6430 /// as qualified as the Other type. For example, "const volatile
6431 /// int" is at least as qualified as "const int", "volatile int",
6432 /// "int", and "const volatile int".
6433 inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const {
6434  Qualifiers OtherQuals = other.getQualifiers();
6435 
6436  // Ignore __unaligned qualifier if this type is a void.
6437  if (getUnqualifiedType()->isVoidType())
6438  OtherQuals.removeUnaligned();
6439 
6440  return getQualifiers().compatiblyIncludes(OtherQuals);
6441 }
6442 
6443 /// If Type is a reference type (e.g., const
6444 /// int&), returns the type that the reference refers to ("const
6445 /// int"). Otherwise, returns the type itself. This routine is used
6446 /// throughout Sema to implement C++ 5p6:
6447 ///
6448 /// If an expression initially has the type "reference to T" (8.3.2,
6449 /// 8.5.3), the type is adjusted to "T" prior to any further
6450 /// analysis, the expression designates the object or function
6451 /// denoted by the reference, and the expression is an lvalue.
6453  if (const auto *RefType = (*this)->getAs<ReferenceType>())
6454  return RefType->getPointeeType();
6455  else
6456  return *this;
6457 }
6458 
6460  return ((getTypePtr()->isVoidType() && !hasQualifiers()) ||
6461  getTypePtr()->isFunctionType());
6462 }
6463 
6464 /// Tests whether the type is categorized as a fundamental type.
6465 ///
6466 /// \returns True for types specified in C++0x [basic.fundamental].
6467 inline bool Type::isFundamentalType() const {
6468  return isVoidType() ||
6469  isNullPtrType() ||
6470  // FIXME: It's really annoying that we don't have an
6471  // 'isArithmeticType()' which agrees with the standard definition.
6472  (isArithmeticType() && !isEnumeralType());
6473 }
6474 
6475 /// Tests whether the type is categorized as a compound type.
6476 ///
6477 /// \returns True for types specified in C++0x [basic.compound].
6478 inline bool Type::isCompoundType() const {
6479  // C++0x [basic.compound]p1:
6480  // Compound types can be constructed in the following ways:
6481  // -- arrays of objects of a given type [...];
6482  return isArrayType() ||
6483  // -- functions, which have parameters of given types [...];
6484  isFunctionType() ||
6485  // -- pointers to void or objects or functions [...];
6486  isPointerType() ||
6487  // -- references to objects or functions of a given type. [...]
6488  isReferenceType() ||
6489  // -- classes containing a sequence of objects of various types, [...];
6490  isRecordType() ||
6491  // -- unions, which are classes capable of containing objects of different
6492  // types at different times;
6493  isUnionType() ||
6494  // -- enumerations, which comprise a set of named constant values. [...];
6495  isEnumeralType() ||
6496  // -- pointers to non-static class members, [...].
6497  isMemberPointerType();
6498 }
6499 
6500 inline bool Type::isFunctionType() const {
6501  return isa<FunctionType>(CanonicalType);
6502 }
6503 
6504 inline bool Type::isPointerType() const {
6505  return isa<PointerType>(CanonicalType);
6506 }
6507 
6508 inline bool Type::isAnyPointerType() const {
6509  return isPointerType() || isObjCObjectPointerType();
6510 }
6511 
6512 inline bool Type::isBlockPointerType() const {
6513  return isa<BlockPointerType>(CanonicalType);
6514 }
6515 
6516 inline bool Type::isReferenceType() const {
6517  return isa<ReferenceType>(CanonicalType);
6518 }
6519 
6520 inline bool Type::isLValueReferenceType() const {
6521  return isa<LValueReferenceType>(CanonicalType);
6522 }
6523 
6524 inline bool Type::isRValueReferenceType() const {
6525  return isa<RValueReferenceType>(CanonicalType);
6526 }
6527 
6528 inline bool Type::isObjectPointerType() const {
6529  // Note: an "object pointer type" is not the same thing as a pointer to an
6530  // object type; rather, it is a pointer to an object type or a pointer to cv
6531  // void.
6532  if (const auto *T = getAs<PointerType>())
6533  return !T->getPointeeType()->isFunctionType();
6534  else
6535  return false;
6536 }
6537 
6538 inline bool Type::isFunctionPointerType() const {
6539  if (const auto *T = getAs<PointerType>())
6540  return T->getPointeeType()->isFunctionType();
6541  else
6542  return false;
6543 }
6544 
6545 inline bool Type::isFunctionReferenceType() const {
6546  if (const auto *T = getAs<ReferenceType>())
6547  return T->getPointeeType()->isFunctionType();
6548  else
6549  return false;
6550 }
6551 
6552 inline bool Type::isMemberPointerType() const {
6553  return isa<MemberPointerType>(CanonicalType);
6554 }
6555 
6557  if (const auto *T = getAs<MemberPointerType>())
6558  return T->isMemberFunctionPointer();
6559  else
6560  return false;
6561 }
6562 
6563 inline bool Type::isMemberDataPointerType() const {
6564  if (const auto *T = getAs<MemberPointerType>())
6565  return T->isMemberDataPointer();
6566  else
6567  return false;
6568 }
6569 
6570 inline bool Type::isArrayType() const {
6571  return isa<ArrayType>(CanonicalType);
6572 }
6573 
6574 inline bool Type::isConstantArrayType() const {
6575  return isa<ConstantArrayType>(CanonicalType);
6576 }
6577 
6578 inline bool Type::isIncompleteArrayType() const {
6579  return isa<IncompleteArrayType>(CanonicalType);
6580 }
6581 
6582 inline bool Type::isVariableArrayType() const {
6583  return isa<VariableArrayType>(CanonicalType);
6584 }
6585 
6586 inline bool Type::isDependentSizedArrayType() const {
6587  return isa<DependentSizedArrayType>(CanonicalType);
6588 }
6589 
6590 inline bool Type::isBuiltinType() const {
6591  return isa<BuiltinType>(CanonicalType);
6592 }
6593 
6594 inline bool Type::isRecordType() const {
6595  return isa<RecordType>(CanonicalType);
6596 }
6597 
6598 inline bool Type::isEnumeralType() const {
6599  return isa<EnumType>(CanonicalType);
6600 }
6601 
6602 inline bool Type::isAnyComplexType() const {
6603  return isa<ComplexType>(CanonicalType);
6604 }
6605 
6606 inline bool Type::isVectorType() const {
6607  return isa<VectorType>(CanonicalType);
6608 }
6609 
6610 inline bool Type::isExtVectorType() const {
6611  return isa<ExtVectorType>(CanonicalType);
6612 }
6613 
6615  return isa<DependentAddressSpaceType>(CanonicalType);
6616 }
6617 
6618 inline bool Type::isObjCObjectPointerType() const {
6619  return isa<ObjCObjectPointerType>(CanonicalType);
6620 }
6621 
6622 inline bool Type::isObjCObjectType() const {
6623  return isa<ObjCObjectType>(CanonicalType);
6624 }
6625 
6627  return isa<ObjCInterfaceType>(CanonicalType) ||
6628  isa<ObjCObjectType>(CanonicalType);
6629 }
6630 
6631 inline bool Type::isAtomicType() const {
6632  return isa<AtomicType>(CanonicalType);
6633 }
6634 
6635 inline bool Type::isUndeducedAutoType() const {
6636  return isa<AutoType>(CanonicalType);
6637 }
6638 
6639 inline bool Type::isObjCQualifiedIdType() const {
6640  if (const auto *OPT = getAs<ObjCObjectPointerType>())
6641  return OPT->isObjCQualifiedIdType();
6642  return false;
6643 }
6644 
6645 inline bool Type::isObjCQualifiedClassType() const {
6646  if (const auto *OPT = getAs<ObjCObjectPointerType>())
6647  return OPT->isObjCQualifiedClassType();
6648  return false;
6649 }
6650 
6651 inline bool Type::isObjCIdType() const {
6652  if (const auto *OPT = getAs<ObjCObjectPointerType>())
6653  return OPT->isObjCIdType();
6654  return false;
6655 }
6656 
6657 inline bool Type::isObjCClassType() const {
6658  if (const auto *OPT = getAs<ObjCObjectPointerType>())
6659  return OPT->isObjCClassType();
6660  return false;
6661 }
6662 
6663 inline bool Type::isObjCSelType() const {
6664  if (const auto *OPT = getAs<PointerType>())
6665  return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel);
6666  return false;
6667 }
6668 
6669 inline bool Type::isObjCBuiltinType() const {
6670  return isObjCIdType() || isObjCClassType() || isObjCSelType();
6671 }
6672 
6673 inline bool Type::isDecltypeType() const {
6674  return isa<DecltypeType>(this);
6675 }
6676 
6677 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
6678  inline bool Type::is##Id##Type() const { \
6679  return isSpecificBuiltinType(BuiltinType::Id); \
6680  }
6681 #include "clang/Basic/OpenCLImageTypes.def"
6682 
6683 inline bool Type::isSamplerT() const {
6684  return isSpecificBuiltinType(BuiltinType::OCLSampler);
6685 }
6686 
6687 inline bool Type::isEventT() const {
6688  return isSpecificBuiltinType(BuiltinType::OCLEvent);
6689 }
6690 
6691 inline bool Type::isClkEventT() const {
6692  return isSpecificBuiltinType(BuiltinType::OCLClkEvent);
6693 }
6694 
6695 inline bool Type::isQueueT() const {
6696  return isSpecificBuiltinType(BuiltinType::OCLQueue);
6697 }
6698 
6699 inline bool Type::isReserveIDT() const {
6700  return isSpecificBuiltinType(BuiltinType::OCLReserveID);
6701 }
6702 
6703 inline bool Type::isImageType() const {
6704 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() ||
6705  return
6706 #include "clang/Basic/OpenCLImageTypes.def"
6707  false; // end boolean or operation
6708 }
6709 
6710 inline bool Type::isPipeType() const {
6711  return isa<PipeType>(CanonicalType);
6712 }
6713 
6714 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
6715  inline bool Type::is##Id##Type() const { \
6716  return isSpecificBuiltinType(BuiltinType::Id); \
6717  }
6718 #include "clang/Basic/OpenCLExtensionTypes.def"
6719 
6720 inline bool Type::isOCLIntelSubgroupAVCType() const {
6721 #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \
6722  isOCLIntelSubgroupAVC##Id##Type() ||
6723  return
6724 #include "clang/Basic/OpenCLExtensionTypes.def"
6725  false; // end of boolean or operation
6726 }
6727 
6728 inline bool Type::isOCLExtOpaqueType() const {
6729 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() ||
6730  return
6731 #include "clang/Basic/OpenCLExtensionTypes.def"
6732  false; // end of boolean or operation
6733 }
6734 
6735 inline bool Type::isOpenCLSpecificType() const {
6736  return isSamplerT() || isEventT() || isImageType() || isClkEventT() ||
6737  isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType();
6738 }
6739 
6740 inline bool Type::isTemplateTypeParmType() const {
6741  return isa<TemplateTypeParmType>(CanonicalType);
6742 }
6743 
6744 inline bool Type::isSpecificBuiltinType(unsigned K) const {
6745  if (const BuiltinType *BT = getAs<BuiltinType>())
6746  if (BT->getKind() == (BuiltinType::Kind) K)
6747  return true;
6748  return false;
6749 }
6750 
6751 inline bool Type::isPlaceholderType() const {
6752  if (const auto *BT = dyn_cast<BuiltinType>(this))
6753  return BT->isPlaceholderType();
6754  return false;
6755 }
6756 
6758  if (const auto *BT = dyn_cast<BuiltinType>(this))
6759  if (BT->isPlaceholderType())
6760  return BT;
6761  return nullptr;
6762 }
6763 
6764 inline bool Type::isSpecificPlaceholderType(unsigned K) const {
6766  if (const auto *BT = dyn_cast<BuiltinType>(this))
6767  return (BT->getKind() == (BuiltinType::Kind) K);
6768  return false;
6769 }
6770 
6772  if (const auto *BT = dyn_cast<BuiltinType>(this))
6773  return BT->isNonOverloadPlaceholderType();
6774  return false;
6775 }
6776 
6777 inline bool Type::isVoidType() const {
6778  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6779  return BT->getKind() == BuiltinType::Void;
6780  return false;
6781 }
6782 
6783 inline bool Type::isHalfType() const {
6784  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6785  return BT->getKind() == BuiltinType::Half;
6786  // FIXME: Should we allow complex __fp16? Probably not.
6787  return false;
6788 }
6789 
6790 inline bool Type::isFloat16Type() const {
6791  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6792  return BT->getKind() == BuiltinType::Float16;
6793  return false;
6794 }
6795 
6796 inline bool Type::isFloat128Type() const {
6797  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6798  return BT->getKind() == BuiltinType::Float128;
6799  return false;
6800 }
6801 
6802 inline bool Type::isNullPtrType() const {
6803  if (const auto *BT = getAs<BuiltinType>())
6804  return BT->getKind() == BuiltinType::NullPtr;
6805  return false;
6806 }
6807 
6809 bool IsEnumDeclScoped(EnumDecl *);
6810 
6811 inline bool Type::isIntegerType() const {
6812  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6813  return BT->getKind() >= BuiltinType::Bool &&
6814  BT->getKind() <= BuiltinType::Int128;
6815  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
6816  // Incomplete enum types are not treated as integer types.
6817  // FIXME: In C++, enum types are never integer types.
6818  return IsEnumDeclComplete(ET->getDecl()) &&
6819  !IsEnumDeclScoped(ET->getDecl());
6820  }
6821  return false;
6822 }
6823 
6824 inline bool Type::isFixedPointType() const {
6825  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
6826  return BT->getKind() >= BuiltinType::ShortAccum &&
6827  BT->getKind() <= BuiltinType::SatULongFract;
6828  }
6829  return false;
6830 }
6831 
6832 inline bool Type::isFixedPointOrIntegerType() const {
6833  return isFixedPointType() || isIntegerType();
6834 }
6835 
6836 inline bool Type::isSaturatedFixedPointType() const {
6837  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
6838  return BT->getKind() >= BuiltinType::SatShortAccum &&
6839  BT->getKind() <= BuiltinType::SatULongFract;
6840  }
6841  return false;
6842 }
6843 
6845  return isFixedPointType() && !isSaturatedFixedPointType();
6846 }
6847 
6848 inline bool Type::isSignedFixedPointType() const {
6849  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
6850  return ((BT->getKind() >= BuiltinType::ShortAccum &&
6851  BT->getKind() <= BuiltinType::LongAccum) ||
6852  (BT->getKind() >= BuiltinType::ShortFract &&
6853  BT->getKind() <= BuiltinType::LongFract) ||
6854  (BT->getKind() >= BuiltinType::SatShortAccum &&
6855  BT->getKind() <= BuiltinType::SatLongAccum) ||
6856  (BT->getKind() >= BuiltinType::SatShortFract &&
6857  BT->getKind() <= BuiltinType::SatLongFract));
6858  }
6859  return false;
6860 }
6861 
6862 inline bool Type::isUnsignedFixedPointType() const {
6863  return isFixedPointType() && !isSignedFixedPointType();
6864 }
6865 
6866 inline bool Type::isScalarType() const {
6867  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6868  return BT->getKind() > BuiltinType::Void &&
6869  BT->getKind() <= BuiltinType::NullPtr;
6870  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
6871  // Enums are scalar types, but only if they are defined. Incomplete enums
6872  // are not treated as scalar types.
6873  return IsEnumDeclComplete(ET->getDecl());
6874  return isa<PointerType>(CanonicalType) ||
6875  isa<BlockPointerType>(CanonicalType) ||
6876  isa<MemberPointerType>(CanonicalType) ||
6877  isa<ComplexType>(CanonicalType) ||
6878  isa<ObjCObjectPointerType>(CanonicalType);
6879 }
6880 
6882  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6883  return BT->getKind() >= BuiltinType::Bool &&
6884  BT->getKind() <= BuiltinType::Int128;
6885 
6886  // Check for a complete enum type; incomplete enum types are not properly an
6887  // enumeration type in the sense required here.
6888  if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
6889  return IsEnumDeclComplete(ET->getDecl());
6890 
6891  return false;
6892 }
6893 
6894 inline bool Type::isBooleanType() const {
6895  if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6896  return BT->getKind() == BuiltinType::Bool;
6897  return false;
6898 }
6899 
6900 inline bool Type::isUndeducedType() const {
6901  auto *DT = getContainedDeducedType();
6902  return DT && !DT->isDeduced();
6903 }
6904 
6905 /// Determines whether this is a type for which one can define
6906 /// an overloaded operator.
6907 inline bool Type::isOverloadableType() const {
6908  return isDependentType() || isRecordType() || isEnumeralType();
6909 }
6910 
6911 /// Determines whether this type can decay to a pointer type.
6912 inline bool Type::canDecayToPointerType() const {
6913  return isFunctionType() || isArrayType();
6914 }
6915 
6916 inline bool Type::hasPointerRepresentation() const {
6917  return (isPointerType() || isReferenceType() || isBlockPointerType() ||
6918  isObjCObjectPointerType() || isNullPtrType());
6919 }
6920 
6922  return isObjCObjectPointerType();
6923 }
6924 
6925 inline const Type *Type::getBaseElementTypeUnsafe() const {
6926  const Type *type = this;
6927  while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe())
6928  type = arrayType->getElementType().getTypePtr();
6929  return type;
6930 }
6931 
6933  const Type *type = this;
6934  if (type->isAnyPointerType())
6935  return type->getPointeeType().getTypePtr();
6936  else if (type->isArrayType())
6937  return type->getBaseElementTypeUnsafe();
6938  return type;
6939 }
6940 /// Insertion operator for diagnostics. This allows sending address spaces into
6941 /// a diagnostic with <<.
6943  LangAS AS) {
6944  DB.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS),
6945  DiagnosticsEngine::ArgumentKind::ak_addrspace);
6946  return DB;
6947 }
6948 
6949 /// Insertion operator for partial diagnostics. This allows sending adress
6950 /// spaces into a diagnostic with <<.
6952  LangAS AS) {
6953  PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS),
6954  DiagnosticsEngine::ArgumentKind::ak_addrspace);
6955  return PD;
6956 }
6957 
6958 /// Insertion operator for diagnostics. This allows sending Qualifiers into a
6959 /// diagnostic with <<.
6961  Qualifiers Q) {
6963  DiagnosticsEngine::ArgumentKind::ak_qual);
6964  return DB;
6965 }
6966 
6967 /// Insertion operator for partial diagnostics. This allows sending Qualifiers
6968 /// into a diagnostic with <<.
6970  Qualifiers Q) {
6972  DiagnosticsEngine::ArgumentKind::ak_qual);
6973  return PD;
6974 }
6975 
6976 /// Insertion operator for diagnostics. This allows sending QualType's into a
6977 /// diagnostic with <<.
6979  QualType T) {
6980  DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
6982  return DB;
6983 }
6984 
6985 /// Insertion operator for partial diagnostics. This allows sending QualType's
6986 /// into a diagnostic with <<.
6988  QualType T) {
6989  PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
6991  return PD;
6992 }
6993 
6994 // Helper class template that is used by Type::getAs to ensure that one does
6995 // not try to look through a qualified type to get to an array type.
6996 template <typename T>
6997 using TypeIsArrayType =
6998  std::integral_constant<bool, std::is_same<T, ArrayType>::value ||
6999  std::is_base_of<ArrayType, T>::value>;
7000 
7001 // Member-template getAs<specific type>'.
7002 template <typename T> const T *Type::getAs() const {
7003  static_assert(!TypeIsArrayType<T>::value,
7004  "ArrayType cannot be used with getAs!");
7005 
7006  // If this is directly a T type, return it.
7007  if (const auto *Ty = dyn_cast<T>(this))
7008  return Ty;
7009 
7010  // If the canonical form of this type isn't the right kind, reject it.
7011  if (!isa<T>(CanonicalType))
7012  return nullptr;
7013 
7014  // If this is a typedef for the type, strip the typedef off without
7015  // losing all typedef information.
7016  return cast<T>(getUnqualifiedDesugaredType());
7017 }
7018 
7019 template <typename T> const T *Type::getAsAdjusted() const {
7020  static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!");
7021 
7022  // If this is directly a T type, return it.
7023  if (const auto *Ty = dyn_cast<T>(this))
7024  return Ty;
7025 
7026  // If the canonical form of this type isn't the right kind, reject it.
7027  if (!isa<T>(CanonicalType))
7028  return nullptr;
7029 
7030  // Strip off type adjustments that do not modify the underlying nature of the
7031  // type.
7032  const Type *Ty = this;
7033  while (Ty) {
7034  if (const auto *A = dyn_cast<AttributedType>(Ty))
7035  Ty = A->getModifiedType().getTypePtr();
7036  else if (const auto *E = dyn_cast<ElaboratedType>(Ty))
7037  Ty = E->desugar().getTypePtr();
7038  else if (const auto *P = dyn_cast<ParenType>(Ty))
7039  Ty = P->desugar().getTypePtr();
7040  else if (const auto *A = dyn_cast<AdjustedType>(Ty))
7041  Ty = A->desugar().getTypePtr();
7042  else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty))
7043  Ty = M->desugar().getTypePtr();
7044  else
7045  break;
7046  }
7047 
7048  // Just because the canonical type is correct does not mean we can use cast<>,
7049  // since we may not have stripped off all the sugar down to the base type.
7050  return dyn_cast<T>(Ty);
7051 }
7052 
7053 inline const ArrayType *Type::getAsArrayTypeUnsafe() const {
7054  // If this is directly an array type, return it.
7055  if (const auto *arr = dyn_cast<ArrayType>(this))
7056  return arr;
7057 
7058  // If the canonical form of this type isn't the right kind, reject it.
7059  if (!isa<ArrayType>(CanonicalType))
7060  return nullptr;
7061 
7062  // If this is a typedef for the type, strip the typedef off without
7063  // losing all typedef information.
7064  return cast<ArrayType>(getUnqualifiedDesugaredType());
7065 }
7066 
7067 template <typename T> const T *Type::castAs() const {
7068  static_assert(!TypeIsArrayType<T>::value,
7069  "ArrayType cannot be used with castAs!");
7070 
7071  if (const auto *ty = dyn_cast<T>(this)) return ty;
7072  assert(isa<T>(CanonicalType));
7073  return cast<T>(getUnqualifiedDesugaredType());
7074 }
7075 
7077  assert(isa<ArrayType>(CanonicalType));
7078  if (const auto *arr = dyn_cast<ArrayType>(this)) return arr;
7079  return cast<ArrayType>(getUnqualifiedDesugaredType());
7080 }
7081 
7082 DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr,
7083  QualType CanonicalPtr)
7084  : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) {
7085 #ifndef NDEBUG
7086  QualType Adjusted = getAdjustedType();
7087  (void)AttributedType::stripOuterNullability(Adjusted);
7088  assert(isa<PointerType>(Adjusted));
7089 #endif
7090 }
7091 
7093  QualType Decayed = getDecayedType();
7095  return cast<PointerType>(Decayed)->getPointeeType();
7096 }
7097 
7098 // Get the decimal string representation of a fixed point type, represented
7099 // as a scaled integer.
7100 // TODO: At some point, we should change the arguments to instead just accept an
7101 // APFixedPoint instead of APSInt and scale.
7103  unsigned Scale);
7104 
7105 } // namespace clang
7106 
7107 #endif // LLVM_CLANG_AST_TYPE_H
bool isSugared() const
Definition: Type.h:2733
bool isDynamicExceptionSpec(ExceptionSpecificationType ESpecType)
Internal representation of canonical, dependent typeof(expr) types.
Definition: Type.h:4326
QualType desugar() const
Definition: Type.h:2570
QualType getPattern() const
Retrieve the pattern of this pack expansion, which is the type that will be repeatedly instantiated w...
Definition: Type.h:5532
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
bool isFloatingPoint() const
Definition: Type.h:2520
QualType getDeducedType() const
Get the type deduced for this placeholder type, or null if it&#39;s either not been deduced or was deduce...
Definition: Type.h:4859
QualType desugar() const
Definition: Type.h:4855
Represents a type that was referred to using an elaborated type keyword, e.g., struct S...
Definition: Type.h:5285
const Type * Ty
The locally-unqualified type.
Definition: Type.h:595
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx)
Definition: Type.h:5087
bool isSugared() const
Definition: Type.h:3005
Represents a function declaration or definition.
Definition: Decl.h:1783
static bool classof(const Type *T)
Definition: Type.h:4488
static void print(SplitQualType split, raw_ostream &OS, const PrintingPolicy &policy, const Twine &PlaceHolder, unsigned Indentation=0)
Definition: Type.h:1004
static Qualifiers fromCVRUMask(unsigned CVRU)
Definition: Type.h:242
bool isFixedPointType() const
Return true if this is a fixed point type according to ISO/IEC JTC1 SC22 WG14 N1169.
Definition: Type.h:6824
const TemplateSpecializationType * getInjectedTST() const
Definition: Type.h:5168
bool isKindOfTypeAsWritten() const
Whether this is a "__kindof" type as written.
Definition: Type.h:5811
The "enum" keyword introduces the elaborated-type-specifier.
Definition: Type.h:5220
void removeUnaligned()
Definition: Type.h:303
bool isObjCQualifiedIdType() const
True if this is equivalent to &#39;id.
Definition: Type.h:6030
void setDependent(bool D=true)
Definition: Type.h:1850
no exception specification
IdentifierInfo * getIdentifier() const
Definition: Type.h:4799
const Type & operator*() const
Definition: Type.h:707
RefQualifierKind getRefQualifier() const
Retrieve the ref-qualifier associated with this function type.
Definition: Type.h:4112
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2614
ArrayRef< QualType > getTypeArgsAsWritten() const
Retrieve the type arguments of this object type as they were written.
Definition: Type.h:5805
bool operator==(Qualifiers Other) const
Definition: Type.h:534
QualType getElementType() const
Definition: Type.h:6173
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3075
QualType getPointeeType() const
Definition: Type.h:2627
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx)
Definition: Type.h:2977
Represents the dependent type named by a dependently-scoped typename using declaration, e.g.
Definition: Type.h:4210
A (possibly-)qualified type.
Definition: Type.h:654
bool isBlockPointerType() const
Definition: Type.h:6512
bool hasNonTrivialToPrimitiveCopyCUnion() const
Check if this is or contains a C union that is non-trivial to copy, which is a union that has a membe...
Definition: Type.h:6398
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee)
Definition: Type.h:2652
bool isArrayType() const
Definition: Type.h:6570
bool getNoCfCheck() const
Definition: Type.h:3582
bool isMemberPointerType() const
Definition: Type.h:6552
bool isSugared() const
Definition: Type.h:2505
QualType getInjectedSpecializationType() const
Definition: Type.h:5166
QualType desugar() const
Definition: Type.h:3730
unsigned getNumExceptions() const
Return the number of types in the exception specification.
Definition: Type.h:4032
static QualType getObjectType(APValue::LValueBase B)
Retrieves the "underlying object type" of the given expression, as used by __builtin_object_size.
QualType getDecayedType() const
Definition: Type.h:2706
__auto_type (GNU extension)
bool isSugared() const
Definition: Type.h:2569
bool isMemberDataPointerType() const
Definition: Type.h:6563
QualType getDesugaredType(const ASTContext &Context) const
Return the specified type with any "sugar" removed from the type.
Definition: Type.h:954
bool isCForbiddenLValueType() const
Determine whether expressions of the given type are forbidden from being lvalues in C...
Definition: Type.h:6459
LangAS getAddressSpace() const
Definition: Type.h:1380
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:3642
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:1385
ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const
Definition: Type.h:3618
Specialize PointerLikeTypeTraits to allow LazyGenerationalUpdatePtr to be placed into a PointerUnion...
Definition: Dominators.h:30
bool isOCLExtOpaqueType() const
Definition: Type.h:6728
ArrayRef< TemplateArgument > getTypeConstraintArguments() const
Definition: Type.h:4904
Expr * getUnderlyingExpr() const
Definition: Type.h:4380
ObjCProtocolDecl *const * qual_iterator
Definition: Type.h:5591
ParameterABI getParameterABI(unsigned I) const
Definition: Type.h:4174
bool IsEnumDeclScoped(EnumDecl *ED)
Check if the given decl is scoped.
Definition: Decl.h:4519
AutoTypeKeyword
Which keyword(s) were used to create an AutoType.
Definition: Type.h:1413
void setInstantiationDependent(bool D=true)
Definition: Type.h:1856
Stmt - This represents one statement.
Definition: Stmt.h:66
NullabilityKind
Describes the nullability of a particular type.
Definition: Specifiers.h:315
ExtInfo(CallingConv CC)
Definition: Type.h:3577
Kind getKind() const
Definition: Type.h:2495
Internal representation of canonical, dependent __underlying_type(type) types.
Definition: Type.h:4454
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3422
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:557
static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, QualType modified, QualType equivalent)
Definition: Type.h:4635
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:5545
ExtInfo withNoCfCheck(bool noCfCheck) const
Definition: Type.h:3625
bool hasExtParameterInfos() const
Is there any interesting extra information for any of the parameters of this function type...
Definition: Type.h:4148
bool isSugared() const
Definition: Type.h:2822
bool isSugared() const
Definition: Type.h:4854
static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner)
Definition: Type.h:2606
No linkage, which means that the entity is unique and can only be referred to from within its scope...
Definition: Linkage.h:26
Qualifiers::GC getObjCGCAttr() const
Definition: Type.h:1372
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3284
void addConst()
Add the const type qualifier to this QualType.
Definition: Type.h:823
bool hasStrongOrWeakObjCLifetime() const
True if the lifetime is either strong or weak.
Definition: Type.h:353
Qualifiers getFastTypeQuals() const
Definition: Type.h:3675
Represents a qualified type name for which the type name is dependent.
Definition: Type.h:5368
CanonicalTTPTInfo CanTTPTInfo
Definition: Type.h:4659
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:336
bool isRecordType() const
Definition: Type.h:6594
friend Qualifiers operator-(Qualifiers L, Qualifiers R)
Compute the difference between two qualifier sets.
Definition: Type.h:557
static bool classof(const Type *T)
Definition: Type.h:2744
bool isSpecificPlaceholderType(unsigned K) const
Test for a specific placeholder type.
Definition: Type.h:6764
static bool classof(const Type *T)
Definition: Type.h:5181
NestedNameSpecifier * getQualifier() const
Retrieve the qualification on this type.
Definition: Type.h:5387
bool isDecltypeAuto() const
Definition: Type.h:4916
QualType getUnderlyingType() const
Definition: Type.h:4285
static void Profile(llvm::FoldingSetNodeID &ID, QualType T)
Definition: Type.h:6149
SourceLocation getRBracketLoc() const
Definition: Type.h:3123
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
QualType desugar() const
Definition: Type.h:2600
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
bool isVariadic() const
Whether this function prototype is variadic.
Definition: Type.h:4086
TagDecl * getDecl() const
Definition: Type.cpp:3296
ObjCObjectTypeBitfields ObjCObjectTypeBits
Definition: Type.h:1774
bool isExtVectorType() const
Definition: Type.h:6610
SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits
Definition: Type.h:1779
static bool classof(const Type *T)
Definition: Type.h:3335
StringRef P
Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained by a type-constraint.
Definition: Type.h:4874
bool isSugared() const
Definition: Type.h:5398
A class providing a concrete implementation of ObjCObjectType, so as to not increase the footprint of...
Definition: Type.h:5847
void removeQualifiers(Qualifiers Q)
Remove the qualifiers from the given set from this set.
Definition: Type.h:441
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:6452
static bool classof(const Type *T)
Definition: Type.h:3298
const DiagnosticBuilder & operator<<(const DiagnosticBuilder &DB, const Attr *At)
Definition: Attr.h:346
The base class of the type hierarchy.
Definition: Type.h:1450
ObjCObjectType(enum Nonce_ObjCInterface)
Definition: Type.h:5740
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context)
Definition: Type.h:4924
bool isClkEventT() const
Definition: Type.h:6691
void setObjCGCAttr(GC type)
Definition: Type.h:308
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2889
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2572
AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, QualType CanonicalPtr)
Definition: Type.h:2669
bool isRestrictQualified() const
Determine whether this type is restrict-qualified.
Definition: Type.h:6320
bool isPlaceholderType() const
Determines whether this type is a placeholder type, i.e.
Definition: Type.h:2532
static bool classof(const Type *T)
Definition: Type.h:2924
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2736
QualType withConst() const
Definition: Type.h:826
bool getNoReturnAttr() const
Determine whether this function type includes the GNU noreturn attribute.
Definition: Type.h:3688
QualType ElementType
The element type of the vector.
Definition: Type.h:3261
A container of type source information.
Definition: Type.h:6227
bool getHasRegParm() const
Definition: Type.h:3682
QualType getValueType() const
Gets the type contained by this atomic type, i.e.
Definition: Type.h:6140
exception_iterator exception_end() const
Definition: Type.h:4142
SourceLocation getAttributeLoc() const
Definition: Type.h:3327
bool isUnspecialized() const
Determine whether this object type is "unspecialized", meaning that it has no type arguments...
Definition: Type.h:5794
ObjCProtocolDecl * getProtocol(unsigned I) const
Fetch a protocol by index.
Definition: Type.h:5607
QualType desugar() const
Definition: Type.h:4189
bool isUnspecialized() const
Whether this type is unspecialized, meaning that is has no type arguments.
Definition: Type.h:6052
TemplateTypeParmDecl * getDecl() const
Definition: Type.h:4694
Qualifiers & operator+=(Qualifiers R)
Definition: Type.h:539
bool isSugared() const
Definition: Type.h:3332
QualType getElementType() const
Definition: Type.h:2910
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:766
TemplateName getTemplateName() const
Retrieve the name of the template that we are deducing.
Definition: Type.h:4958
QualType withFastQualifiers(unsigned TQs) const
Definition: Type.h:869
The type would be trivial except that it is volatile-qualified.
Definition: Type.h:1130
bool isSugared() const
Definition: Type.h:3412
static Qualifiers fromOpaqueValue(unsigned opaque)
Definition: Type.h:249
ArrayRef< ObjCProtocolDecl * > getProtocols() const
Retrieve all of the protocol qualifiers.
Definition: Type.h:5613
void removeObjCLifetime()
Definition: Type.h:339
bool isParamConsumed(unsigned I) const
Definition: Type.h:4181
unsigned getNumParams() const
Definition: Type.h:3964
bool isEnumeralType() const
Definition: Type.h:6598
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:7002
bool isOverloadableType() const
Determines whether this is a type for which one can define an overloaded operator.
Definition: Type.h:6907
bool hasPointerRepresentation() const
Whether this type is represented natively as a pointer.
Definition: Type.h:6916
The "union" keyword.
Definition: Type.h:5195
Extra information about a function prototype.
Definition: Type.h:3837
const ArrayType * castAsArrayTypeUnsafe() const
A variant of castAs<> for array type which silently discards qualifiers from the outermost type...
Definition: Type.h:7076
LangAS
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:25
ArrayTypeBitfields ArrayTypeBits
Definition: Type.h:1768
Represents a C++17 deduced template specialization type.
Definition: Type.h:4940
The "__interface" keyword.
Definition: Type.h:5192
ExtInfo withProducesResult(bool producesResult) const
Definition: Type.h:3611
QualType desugar() const
Definition: Type.h:4224
SourceLocation getLBracketLoc() const
Definition: Type.h:3065
bool isConst() const
Definition: Type.h:3697
static Qualifiers fromFastMask(unsigned Mask)
Definition: Type.h:230
bool isSugared() const
Definition: Type.h:4258
static StringRef getTagTypeKindName(TagTypeKind Kind)
Definition: Type.h:5269
ExtParameterInfo withIsConsumed(bool consumed) const
Definition: Type.h:3471
QualType(const Type *Ptr, unsigned Quals)
Definition: Type.h:678
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:47
void print(llvm::raw_ostream &OS, const Pointer &P, ASTContext &Ctx, QualType Ty)
Definition: InterpFrame.cpp:62
static void * getAsVoidPointer(::clang::Type *P)
Definition: Type.h:83
bool isSpecializedAsWritten() const
Whether this type is specialized, meaning that it has type arguments.
Definition: Type.h:6047
Represents the result of substituting a type for a template type parameter.
Definition: Type.h:4728
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2648
QualType getLocalUnqualifiedType() const
Return this type with all of the instance-specific qualifiers removed, but without removing any quali...
Definition: Type.h:893
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:23
noexcept(expression), value-dependent
QualType desugar() const
Remove a single level of sugar.
Definition: Type.h:4361
The collection of all-type qualifiers we support.
Definition: Type.h:143
bool isVariableArrayType() const
Definition: Type.h:6582
bool isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType)
QualType desugar() const
Definition: Type.h:5083
PipeType - OpenCL20.
Definition: Type.h:6159
bool isObjCObjectOrInterfaceType() const
Definition: Type.h:6626
bool isDependentSizedArrayType() const
Definition: Type.h:6586
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3132
SourceLocation getAttributeLoc() const
Definition: Type.h:3212
ElaboratedTypeBitfields ElaboratedTypeBits
Definition: Type.h:1777
Base wrapper for a particular "section" of type source info.
Definition: TypeLoc.h:58
Represents a struct/union/class.
Definition: Decl.h:3748
bool isSugared() const
Definition: Type.h:5834
The width of the "fast" qualifier mask.
Definition: Type.h:186
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
Definition: Diagnostic.h:1161
DependentTypeOfExprType(const ASTContext &Context, Expr *E)
Definition: Type.h:4331
PackExpansionTypeBitfields PackExpansionTypeBits
Definition: Type.h:1783
QualType getOriginalType() const
Definition: Type.h:2678
FunctionType::ExtInfo ExtInfo
Definition: Type.h:3838
One of these records is kept for each identifier that is lexed.
bool operator==(ExtInfo Other) const
Definition: Type.h:3594
bool isObjCQualifiedClass() const
Definition: Type.h:5777
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:736
QualType desugar() const
Definition: Type.h:6177
bool isNothrow(bool ResultIfDependent=false) const
Determine whether this function type has a non-throwing exception specification.
Definition: Type.h:4081
unsigned getRegParm() const
Definition: Type.h:3585
QualType IgnoreParens() const
Returns the specified type after dropping any outer-level parentheses.
Definition: Type.h:973
Represents a class type in Objective C.
Definition: Type.h:5694
void removeRestrict()
Definition: Type.h:272
QualType getPointeeType() const
Definition: Type.h:2731
std::pair< const Type *, Qualifiers > asPair() const
Definition: Type.h:606
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:168
is ARM Neon vector
Definition: Type.h:3251
ArrayRef< QualType > getParamTypes() const
Definition: Type.h:3971
ArrayRef< ExtParameterInfo > getExtParameterInfos() const
Definition: Type.h:4152
static bool classof(const Type *T)
Definition: Type.h:5484
bool isObjCInertUnsafeUnretainedType() const
Was this type written with the special inert-in-ARC __unsafe_unretained qualifier?
Definition: Type.h:2064
bool isSpelledAsLValue() const
Definition: Type.h:2766
bool isObjCIdType() const
Definition: Type.h:6651
TemplateName getTemplateName() const
Retrieve the name of the template that we are specializing.
Definition: Type.h:5059
bool isCanonicalUnqualified() const
Determines if this type would be canonical if it had no further qualification.
Definition: Type.h:1902
Defines the ExceptionSpecificationType enumeration and various utility functions. ...
void removeConst()
Definition: Type.h:262
QualType desugar() const
Remove a single level of sugar.
Definition: Type.h:5328
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2873
static bool classof(const Type *T)
Definition: Type.h:2809
const IdentifierInfo * getMacroIdentifier() const
Definition: Type.h:4284
void setLocalFastQualifiers(unsigned Quals)
Definition: Type.h:682
bool isReferenceType() const
Definition: Type.h:6516
Base class that is common to both the ExtQuals and Type classes, which allows QualType to access the ...
Definition: Type.h:1309
static bool classof(const Type *T)
Definition: Type.h:2549
static bool classof(const Type *T)
Definition: Type.h:5913
Represents the result of substituting a set of types for a template type parameter pack...
Definition: Type.h:4784
TagDecl * getOwnedTagDecl() const
Return the (re)declaration of this type owned by this occurrence of this type, or nullptr if there is...
Definition: Type.h:5335
friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs)
Definition: Type.h:3508
QualType desugar() const
Definition: Type.h:3006
void overrideType(QualType T)
Override the type stored in this TypeSourceInfo. Use with caution!
Definition: Type.h:6244
bool isSpecialized() const
Whether this type is specialized, meaning that it has type arguments.
Definition: Type.h:6044
bool hasNonTrivialObjCLifetime() const
True if the lifetime is neither None or ExplicitNone.
Definition: Type.h:347
bool isSpecificBuiltinType(unsigned K) const
Test for a particular builtin type.
Definition: Type.h:6744
qual_iterator qual_begin() const
Definition: Type.h:5595
static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, unsigned NumElements, TypeClass TypeClass, VectorKind VecKind)
Definition: Type.h:3289
Defines the clang::attr::Kind enum.
static int getPointAccessorIdx(char c)
Definition: Type.h:3361
QualType desugar() const
Definition: Type.h:2682
bool isObjCSelType() const
Definition: Type.h:6663
unsigned char getOpaqueValue() const
Definition: Type.h:3497
static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee, bool SpelledAsLValue)
Definition: Type.h:2783
bool isObjCQualifiedClassType() const
Definition: Type.h:6645
QualType desugar() const
Definition: Type.h:2807
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:6179
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:6433
bool isIntegralOrEnumerationType() const
Determine whether this type is an integral or enumeration type.
Definition: Type.h:6881
bool isUnspecializedAsWritten() const
Determine whether this object type is "unspecialized" as written, meaning that it has no type argumen...
Definition: Type.h:6056
static bool classof(const Type *T)
Definition: Type.h:4866
ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, bool SpelledAsLValue)
Definition: Type.h:2754
Qualifiers getLocalQualifiers() const
Retrieve the set of qualifiers local to this particular QualType instance, not including any qualifie...
Definition: Type.h:6275
FunctionType(TypeClass tc, QualType res, QualType Canonical, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack, ExtInfo Info)
Definition: Type.h:3664
Values of this type can be null.
void addRestrict()
Add the restrict qualifier to this QualType.
Definition: Type.h:839
bool getProducesResult() const
Definition: Type.h:3580
static bool classof(const Type *T)
Definition: Type.h:6153
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3177
bool isObjCUnqualifiedClass() const
Definition: Type.h:5768
Type(TypeClass tc, QualType canon, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack)
Definition: Type.h:1831
bool isSugared() const
Definition: Type.h:5651
An rvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2815
static bool classof(const Type *T)
Definition: Type.h:3008
UnresolvedUsingTypenameDecl * getDecl() const
Definition: Type.h:4221
qual_iterator qual_end() const
Definition: Type.h:5596
static bool classof(const Type *T)
Definition: Type.h:2710
bool hasAddressSpace() const
Definition: Type.h:1379
An lvalue ref-qualifier was provided (&).
Definition: Type.h:1406
bool isSugared() const
Definition: Type.h:4223
void addObjCGCAttr(GC type)
Definition: Type.h:312
Microsoft throw(...) extension.
A convenient class for passing around template argument information.
Definition: TemplateBase.h:554
static bool classof(const Type *T)
Definition: Type.h:6120
TemplateName getTemplateName() const
Definition: Type.h:5172
static void dump(llvm::raw_ostream &OS, StringRef FunctionName, ArrayRef< CounterExpression > Expressions, ArrayRef< CounterMappingRegion > Regions)
QualType getExceptionType(unsigned i) const
Return the ith exception type, where 0 <= i < getNumExceptions().
Definition: Type.h:4040
QualType desugar() const
Definition: Type.h:2965
bool hasAddressSpace() const
Definition: Type.h:358
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
void print(raw_ostream &OS, const PrintingPolicy &Policy, const Twine &PlaceHolder=Twine(), unsigned Indentation=0) const
const ArrayType * getAsArrayTypeUnsafe() const
A variant of getAs<> for array types which silently discards qualifiers from the outermost type...
Definition: Type.h:7053
The "struct" keyword introduces the elaborated-type-specifier.
Definition: Type.h:5208
ConstantArrayTypeBitfields ConstantArrayTypeBits
Definition: Type.h:1769
TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, QualType Canonical, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack)
Definition: Type.h:5236
Whether values of this type can be null is (explicitly) unspecified.
bool isCurrentInstantiation() const
True if this template specialization type matches a current instantiation in the context in which it ...
Definition: Type.h:5025
QualType desugar() const
Definition: Type.h:2823
Visibility
Describes the different kinds of visibility that a declaration may have.
Definition: Visibility.h:33
bool isTypeAlias() const
Determine if this template specialization type is for a type alias template that has been substituted...
Definition: Type.h:5044
unsigned toTargetAddressSpace(LangAS AS)
Definition: AddressSpaces.h:66
Visibility getVisibility() const
Determine the visibility of this type.
Definition: Type.h:2375
bool isConstrained() const
Definition: Type.h:4912
Sugar type that represents a type that was qualified by a qualifier written as a macro invocation...
Definition: Type.h:4266
llvm::iterator_range< param_type_iterator > param_type_range
Definition: Type.h:4117
Represents a typeof (or typeof) expression (a GCC extension).
Definition: Type.h:4300
bool containsUnexpandedParameterPack() const
Whether this type is or contains an unexpanded parameter pack, used to support C++0x variadic templat...
Definition: Type.h:1896
static bool isRecordType(QualType T)
QualType withExactLocalFastQualifiers(unsigned TQs) const
Definition: Type.h:877
void addCVRQualifiers(unsigned mask)
Definition: Type.h:290
bool isNonOverloadPlaceholderType() const
Determines whether this type is a placeholder type other than Overload.
Definition: Type.h:2545
bool isVolatileQualified() const
Determine whether this type is volatile-qualified.
Definition: Type.h:6326
bool hasNonTrivialToPrimitiveDestructCUnion() const
Check if this is or contains a C union that is non-trivial to destruct, which is a union that has a m...
Definition: Type.h:6392
LangAS getAddressSpace() const
Definition: Type.h:359
ObjCProtocolDecl *const * getProtocolStorage() const
Definition: Type.h:5569
FunctionTypeBitfields store various bits belonging to FunctionProtoType.
Definition: Type.h:1551
const Type * getClass() const
Definition: Type.h:2867
bool isRValueReferenceType() const
Definition: Type.h:6524
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:5340
Defines the Diagnostic-related interfaces.
The type is an Objective-C retainable pointer type that is qualified with the ARC __strong qualifier...
Definition: Type.h:1134
QualType getPointeeType() const
Definition: Type.h:7092
Values of this type can never be null.
Expr * getSizeExpr() const
Definition: Type.h:3058
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R)
Returns the common set of qualifiers while removing them from the given sets.
Definition: Type.h:194
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6256
static bool classof(const Type *T)
Definition: Type.h:3071
const TemplateArgument * getArgs() const
Retrieve the template arguments.
Definition: Type.h:5062
param_type_iterator param_type_begin() const
Definition: Type.h:4123
TemplateTypeParmDecl * TTPDecl
Definition: Type.h:4662
QualType desugar() const
Definition: Type.h:2734
void addQualifiers(Qualifiers Q)
Add the qualifiers from the given set to this set.
Definition: Type.h:424
Type * this_()
Definition: Type.h:1848
The type is an Objective-C retainable pointer type that is qualified with the ARC __strong qualifier...
Definition: Type.h:1103
bool hasDynamicExceptionSpec() const
Return whether this function has a dynamic (throw) exception spec.
Definition: Type.h:3998
static bool isBooleanType(QualType Ty)
Defines the Linkage enumeration and various utility functions.
static bool classof(const Type *T)
Definition: Type.h:4443
static bool classof(const Type *T)
Definition: Type.h:4294
const T * getAsAdjusted() const
Member-template getAsAdjusted<specific type>.
Definition: Type.h:7019
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2078
const Type * operator->() const
Definition: Type.h:711
void setUnaligned(bool flag)
Definition: Type.h:300
QualType desugar() const
Definition: Type.h:6143
bool isFloat128Type() const
Definition: Type.h:6796
static bool classof(const Type *T)
Definition: Type.h:2656
bool isScalarType() const
Definition: Type.h:6866
void * getAsOpaquePtr() const
Definition: Type.h:699
bool compatiblyIncludesObjCLifetime(Qualifiers other) const
Determines if these qualifiers compatibly include another set of qualifiers from the narrow perspecti...
Definition: Type.h:517
friend Qualifiers operator+(Qualifiers L, Qualifiers R)
Definition: Type.h:546
bool Const(InterpState &S, CodePtr OpPC, const T &Arg)
Definition: Interp.h:294
void addCVRUQualifiers(unsigned mask)
Definition: Type.h:294
void addUnaligned()
Definition: Type.h:304
Represents an ObjC class declaration.
Definition: DeclObjC.h:1186
ObjCInterfaceDecl * getInterface() const
Gets the interface declaration for this object type, if the base type really is an interface...
Definition: Type.h:5930
bool getNoReturn() const
Definition: Type.h:3579
friend bool operator==(const QualType &LHS, const QualType &RHS)
Indicate whether the specified types and qualifiers are identical.
Definition: Type.h:980
bool isKindOfType() const
Whether this is a "__kindof" type.
Definition: Type.h:6041
PrimitiveDefaultInitializeKind
Definition: Type.h:1095
FunctionDecl * SourceDecl
The function whose exception specification this is, for EST_Unevaluated and EST_Uninstantiated.
Definition: Type.h:3823
SplitQualType getSplitDesugaredType() const
Definition: Type.h:958
void removeVolatile()
Definition: Type.h:267
bool hasConst() const
Definition: Type.h:260
ExceptionSpecInfo getExceptionSpecInfo() const
Return all the available information about this type&#39;s exception spec.
Definition: Type.h:4015
The type does not fall into any of the following categories.
Definition: Type.h:1125
void setFastQualifiers(unsigned mask)
Definition: Type.h:394
Expr * getSizeExpr() const
Definition: Type.h:3115
bool getNoCallerSavedRegs() const
Definition: Type.h:3581
QualType getPointeeTypeAsWritten() const
Definition: Type.h:2769
Expr * getSizeExpr() const
Definition: Type.h:3325
unsigned getNumProtocols() const
Return the number of qualifying protocols in this type, or 0 if there are none.
Definition: Type.h:5602
QualType getElementType() const
Definition: Type.h:3211
bool isUnsignedFixedPointType() const
Return true if this is a fixed point type that is unsigned according to ISO/IEC JTC1 SC22 WG14 N1169...
Definition: Type.h:6862
static void Profile(llvm::FoldingSetNodeID &ID, const TemplateTypeParmType *Replaced, QualType Replacement)
Definition: Type.h:4760
bool isSugared() const
Definition: Type.h:4700
Represents an extended vector type where either the type or size is dependent.
Definition: Type.h:3195
This object can be modified without requiring retains or releases.
Definition: Type.h:164
Defines the clang::Visibility enumeration and various utility functions.
The type does not fall into any of the following categories.
Definition: Type.h:1099
Qualifiers withoutObjCGCAttr() const
Definition: Type.h:316
static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, const IdentifierInfo *Name)
Definition: Type.h:5405
static bool classof(const Type *T)
Definition: Type.h:4934
ExtInfo withCallingConv(CallingConv cc) const
Definition: Type.h:3638
friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs)
Definition: Type.h:3504
Represents a K&R-style &#39;int foo()&#39; function, which has no information available about its arguments...
Definition: Type.h:3717
Expr * getAddrSpaceExpr() const
Definition: Type.h:3166
bool isHalfType() const
Definition: Type.h:6783
Provides definitions for the various language-specific address spaces.
bool hasObjCLifetime() const
Definition: Type.h:1374
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:5401
bool isSpecializedAsWritten() const
Determine whether this object type was written with type arguments.
Definition: Type.h:5788
QualType getBaseType() const
Gets the base type of this object type.
Definition: Type.h:5757
unsigned getLocalFastQualifiers() const
Definition: Type.h:681
bool isSugared() const
Definition: Type.h:5910
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2602
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:1053
ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
Definition: Type.h:1359
FunctionDecl * getExceptionSpecDecl() const
If this function type has an exception specification which hasn&#39;t been determined yet (either because...
Definition: Type.h:4057
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3754
bool hasOnlyVolatile() const
Definition: Type.h:266
bool compatiblyIncludes(Qualifiers other) const
Determines if these qualifiers compatibly include another set.
Definition: Type.h:496
bool isInnerRef() const
Definition: Type.h:2767
bool isSugared() const
Returns whether this type directly provides sugar.
Definition: Type.h:4364
bool isMoreQualifiedThan(QualType Other) const
Determine whether this type is more qualified than the other given type, requiring exact equality for...
Definition: Type.h:6423
qual_range quals() const
Definition: Type.h:5594
bool isNonOverloadPlaceholderType() const
Test for a placeholder type other than Overload; see BuiltinType::isNonOverloadPlaceholderType.
Definition: Type.h:6771
This class wraps the list of protocol qualifiers.
Definition: Type.h:5565
Qualifiers getQualifiers() const
Definition: Type.h:1369
ArraySizeModifier
Capture whether this is a normal array (e.g.
Definition: Type.h:2895
const Type * getPointeeOrArrayElementType() const
If this is a pointer type, return the pointee type.
Definition: Type.h:6932
QualType desugar() const
Definition: Type.h:2646
static ExtParameterInfo getFromOpaqueValue(unsigned char data)
Definition: Type.h:3498
bool hasQualifiers() const
Determine whether this type has any qualifiers.
Definition: Type.h:6331
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:340
ObjCTypeParamDecl * getDecl() const
Definition: Type.h:5663
bool isSaturatedFixedPointType() const
Return true if this is a saturated fixed point type according to ISO/IEC JTC1 SC22 WG14 N1169...
Definition: Type.h:6836
ObjCProtocolDecl ** getProtocolStorage()
Definition: Type.h:5573
DependentTemplateSpecializationTypeBitfields DependentTemplateSpecializationTypeBits
Definition: Type.h:1782
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3732
static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, QualType NamedType, TagDecl *OwnedTagDecl)
Definition: Type.h:5344
Represents an array type in C++ whose size is a value-dependent expression.
Definition: Type.h:3093
bool isSugared() const
Definition: Type.h:2645
static bool classof(const Type *T)
Definition: Type.h:2610
RecordType(TypeClass TC, RecordDecl *D)
Definition: Type.h:4501
const TemplateArgument * getArgs() const
Retrieve the template arguments.
Definition: Type.h:4893
static bool classof(const Type *T)
Definition: Type.h:5353
QualType getElementType() const
Definition: Type.h:2567
bool isEventT() const
Definition: Type.h:6687
static bool isRead(AccessKinds AK)
IdentifierInfo * getIdentifier() const
Definition: Type.cpp:3390
bool hasOnlyConst() const
Definition: Type.h:261
ExtParameterInfo withIsNoEscape(bool NoEscape) const
Definition: Type.h:3488
unsigned getNumArgs() const
Retrieve the number of template arguments.
Definition: Type.h:5455
bool isObjCGCStrong() const
true when Type is objc&#39;s strong.
Definition: Type.h:1075
QualType desugar() const
Definition: Type.h:4436
void addVolatile()
Definition: Type.h:268
This represents one expression.
Definition: Expr.h:108
bool isSugared() const
Definition: Type.h:2870
QualType getPointeeType() const
Definition: Type.h:2771
static void getAsStringInternal(SplitQualType split, std::string &out, const PrintingPolicy &policy)
Definition: Type.h:1018
static bool classof(const Type *T)
Definition: Type.h:3709
The "typename" keyword precedes the qualified type name, e.g., typename T::type.
Definition: Type.h:5224
bool isFunctionNoProtoType() const
Definition: Type.h:2012
llvm::StringRef getAsString(SyncScope S)
Definition: SyncScope.h:50
unsigned getAsOpaqueValue() const
Definition: Type.h:256
static Kind getNullabilityAttrKind(NullabilityKind kind)
Retrieve the attribute kind corresponding to the given nullability kind.
Definition: Type.h:4606
bool isSugared() const
Definition: Type.h:3068
Declaration of a template type parameter.
QualType desugar() const
Definition: Type.h:3278
unsigned getIndex() const
Definition: Type.h:4691
Internal representation of canonical, dependent decltype(expr) types.
Definition: Type.h:4398
bool getHasRegParm() const
Definition: Type.h:3583
friend bool operator!=(const QualType &LHS, const QualType &RHS)
Definition: Type.h:983
bool isObjCBuiltinType() const
Definition: Type.h:6669
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:7067
static bool classof(const Type *T)
Definition: Type.h:5654
ElaboratedTypeKeyword
The elaboration keyword that precedes a qualified type name or introduces an elaborated-type-specifie...
Definition: Type.h:5206
static bool classof(const Type *T)
Definition: Type.h:4971
bool isSugared() const
Definition: Type.h:4291
#define V(N, I)
Definition: ASTContext.h:2941
__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-base.h:62
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4631
Qualifiers::GC getObjCGCAttr() const
Returns gc attribute of this type.
Definition: Type.h:6382
const internal::VariadicAllOfMatcher< Decl > decl
Matches declarations.
bool isFunctionReferenceType() const
Definition: Type.h:6545
ObjCSubstitutionContext
The kind of type we are substituting Objective-C type arguments into.
Definition: Type.h:623
QualType desugar() const
Definition: Type.h:2506
bool isSignedInteger() const
Definition: Type.h:2512
bool isNullPtrType() const
Definition: Type.h:6802
bool hasFastQualifiers() const
Definition: Type.h:392
unsigned getFastQualifiers() const
Definition: Type.h:393
static bool classof(const Type *T)
Definition: Type.h:4226
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:1056
#define bool
Definition: stdbool.h:15
QualType desugar() const
Definition: Type.h:3171
ObjCLifetime getObjCLifetime() const
Definition: Type.h:333
void removeFastQualifiers(unsigned mask)
Definition: Type.h:398
bool isObjCClassType() const
Definition: Type.h:6657
bool canDecayToPointerType() const
Determines whether this type can decay to a pointer type.
Definition: Type.h:6912
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2684
bool isSugared() const
Returns whether this type directly provides sugar.
Definition: Type.h:5331
QualType getBaseType() const
Definition: Type.h:4439
QualType desugar() const
Definition: Type.h:4701
bool isObjCIdType() const
True if this is equivalent to the &#39;id&#39; type, i.e.
Definition: Type.h:6013
bool isAnyComplexType() const
Definition: Type.h:6602
const IdentifierInfo * getIdentifier() const
Retrieve the type named by the typename specifier as an identifier.
Definition: Type.h:5394
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4404
Represents a C++ template name within the type system.
Definition: TemplateName.h:191
Represents the type decltype(expr) (C++11).
Definition: Type.h:4370
void removeLocalConst()
Definition: Type.h:6350
void removeLocalVolatile()
Definition: Type.h:6358
void printTemplateArgumentList(raw_ostream &OS, ArrayRef< TemplateArgument > Args, const PrintingPolicy &Policy)
Print a template argument list, including the &#39;<&#39; and &#39;>&#39; enclosing the template arguments.
int Depth
Definition: ASTDiff.cpp:190
ObjCProtocolDecl * getProtocol(unsigned I) const
Retrieve a qualifying protocol by index on the object type.
Definition: Type.h:6092
const AstTypeMatcher< ArrayType > arrayType
Matches all kinds of arrays.
AutoType * getContainedAutoType() const
Get the AutoType whose type will be deduced for a variable with an initializer of this type...
Definition: Type.h:2251
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:593
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3339
static Optional< NullabilityKind > stripOuterNullability(QualType &T)
Strip off the top-level nullability annotation on the given type, if it&#39;s there.
Definition: Type.cpp:3968
The type is an Objective-C retainable pointer type that is qualified with the ARC __weak qualifier...
Definition: Type.h:1107
A unary type transform, which is a type constructed from another.
Definition: Type.h:4413
static bool classof(const Type *T)
Definition: Type.h:2790
Qualifiers Quals
The local qualifiers.
Definition: Type.h:598
QualType desugar() const
Definition: Type.h:5399
void setAddressSpace(LangAS space)
Definition: Type.h:379
bool isObjCUnqualifiedId() const
Definition: Type.h:5767
static bool classof(const Type *T)
Definition: Type.h:2987
ScalarTypeKind
Definition: Type.h:2132
A helper class for Type nodes having an ElaboratedTypeKeyword.
Definition: Type.h:5234
QualType desugar() const
Definition: Type.h:4754
SourceLocation getEnd() const
Represents a GCC generic vector type.
Definition: Type.h:3235
ArraySizeModifier getSizeModifier() const
Definition: Type.h:2912
An lvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2797
UTTKind getUTTKind() const
Definition: Type.h:4441
unsigned getNumProtocols() const
Return the number of qualifying protocols on the object type.
Definition: Type.h:6087
Common base class for placeholders for types that get replaced by placeholder type deduction: C++11 a...
Definition: Type.h:4833
const Type * getBaseElementTypeUnsafe() const
Get the base element type of this type, potentially discarding type qualifiers.
Definition: Type.h:6925
const BuiltinType * getAsPlaceholderType() const
Definition: Type.h:6757
bool hasTargetSpecificAddressSpace() const
Definition: Type.h:362
ObjCObjectType::qual_iterator qual_iterator
An iterator over the qualifiers on the object type.
Definition: Type.h:6071
bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const
Check if this is or contains a C union that is non-trivial to default-initialize, which is a union th...
Definition: Type.h:6386
static bool classof(const Type *T)
Definition: Type.h:5557
void removeLocalCVRQualifiers(unsigned Mask)
Definition: Type.h:6362
ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, bool producesResult, bool noCallerSavedRegs, bool NoCfCheck)
Definition: Type.h:3561
QualType withoutLocalFastQualifiers() const
Definition: Type.h:882
bool isObjCClass() const
Definition: Type.h:5763
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:719
bool IsEnumDeclComplete(EnumDecl *ED)
Check if the given decl is complete.
Definition: Decl.h:4511
QualType desugar() const
Definition: Type.h:5911
void removeCVRQualifiers(unsigned mask)
Definition: Type.h:283
static StringRef getIdentifier(const Token &Tok)
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:265
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4460
Expr * getUnderlyingExpr() const
Definition: Type.h:4309
bool hasOnlyRestrict() const
Definition: Type.h:271
unsigned getCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers applied to this type.
Definition: Type.h:6289
bool isSignedFixedPointType() const
Return true if this is a fixed point type that is signed according to ISO/IEC JTC1 SC22 WG14 N1169...
Definition: Type.h:6848
ExtInfo withNoReturn(bool noReturn) const
Definition: Type.h:3604
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:6315
bool hasTrailingReturn() const
Whether this function prototype has a trailing return type.
Definition: Type.h:4102
bool hasQualifiers() const
Return true if the set contains any qualifiers.
Definition: Type.h:420
SplitQualType split() const
Divides a QualType into its unqualified type and a set of local qualifiers.
Definition: Type.h:6264
RecordDecl * getDecl() const
Definition: Type.h:4505
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee)
Definition: Type.h:2740
noexcept(expression), evals to &#39;false&#39;
llvm::iterator_range< qual_iterator > qual_range
Definition: Type.h:5592
bool isObjectPointerType() const
Definition: Type.h:6528
static void * getAsVoidPointer(::clang::ExtQuals *P)
Definition: Type.h:94
bool operator!=(ExtInfo Other) const
Definition: Type.h:3597
bool isSugared() const
Definition: Type.h:3729
ArrayRef< QualType > getTypeArgsAsWritten() const
Retrieve the type arguments for this type.
Definition: Type.h:6064
CanThrowResult
Possible results from evaluation of a noexcept expression.
static void * getAsVoidPointer(clang::QualType P)
Definition: Type.h:1290
bool isComputedNoexcept(ExceptionSpecificationType ESpecType)
There is no lifetime qualification on this type.
Definition: Type.h:160
static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, ExtInfo Info)
Definition: Type.h:3736
void setNumProtocols(unsigned N)
Definition: Type.h:5577
is AltiVec &#39;vector Pixel&#39;
Definition: Type.h:3245
#define false
Definition: stdbool.h:17
The "struct" keyword.
Definition: Type.h:5189
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:171
Kind
QualType getCanonicalType() const
Definition: Type.h:6295
bool isBuiltinType() const
Helper methods to distinguish type categories.
Definition: Type.h:6590
not a target-specific vector type
Definition: Type.h:3239
ExceptionSpecificationType Type
The kind of exception specification this is.
Definition: Type.h:3813
static bool classof(const Type *T)
Definition: Type.h:4389
bool isSugared() const
Definition: Type.h:6175
param_type_range param_types() const
Definition: Type.h:4119
static bool classof(const Type *T)
Definition: Type.h:4261
ExtParameterInfo getExtParameterInfo(unsigned I) const
Definition: Type.h:4167
ElaboratedTypeKeyword getKeyword() const
Definition: Type.h:5246
ExtProtoInfo getExtProtoInfo() const
Definition: Type.h:3975
bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const
Definition: Type.h:3406
const ExtParameterInfo * ExtParameterInfos
Definition: Type.h:3844
Encodes a location in the source.
ObjCInterfaceDecl * getDecl() const
Get the declaration of this interface.
Definition: Type.h:5908
void addVolatile()
Add the volatile type qualifier to this QualType.
Definition: Type.h:831
Sugar for parentheses used when specifying types.
Definition: Type.h:2584
QualType getAdjustedType() const
Definition: Type.h:2679
QualType getReturnType() const
Definition: Type.h:3680
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of enums...
Definition: Type.h:4521
bool qual_empty() const
Definition: Type.h:6084
llvm::APSInt APSInt
bool isMemberDataPointer() const
Returns true if the member type (i.e.
Definition: Type.h:2863
LangAS getAddressSpace() const
Return the address space of this type.
Definition: Type.h:6377
QualType getSingleStepDesugaredType(const ASTContext &Context) const
Return the specified type with one level of "sugar" removed from the type.
Definition: Type.h:967
Represents typeof(type), a GCC extension.
Definition: Type.h:4343
Interfaces are the core concept in Objective-C for object oriented design.
Definition: Type.h:5894
bool isVariablyModifiedType() const
Whether this type is a variably-modified type (C99 6.7.5).
Definition: Type.h:2166
static inline ::clang::ExtQuals * getFromVoidPointer(void *P)
Definition: Type.h:96
bool isObjCQualifiedClassType() const
True if this is equivalent to &#39;Class.
Definition: Type.h:6036
static bool classof(const Type *T)
Definition: Type.h:2693
A simple holder for various uncommon bits which do not fit in FunctionTypeBitfields.
Definition: Type.h:3656
bool hasObjCGCAttr() const
Definition: Type.h:1371
static bool classof(const Type *T)
Definition: Type.h:2883
ParameterABI getABI() const
Return the ABI treatment of this parameter.
Definition: Type.h:3461
unsigned NumExceptionType
The number of types in the exception specification.
Definition: Type.h:3660
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3219
static bool isPlaceholderTypeKind(Kind K)
Determines whether the given kind corresponds to a placeholder type.
Definition: Type.h:2525
CallingConv getCC() const
Definition: Type.h:3592
static bool classof(const Type *T)
Definition: Type.h:3128
QualType getElementType() const
Definition: Type.h:3270
static QualType getUnderlyingType(const SubRegion *R)
static void Profile(llvm::FoldingSetNodeID &ID, QualType T)
Definition: Type.h:6116
Represents a vector type where either the type or size is dependent.
Definition: Type.h:3312
static bool classof(const Type *T)
Definition: Type.h:3173
unsigned getLocalCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers local to this particular QualType instan...
Definition: Type.h:781
void FixedPointValueToString(SmallVectorImpl< char > &Str, llvm::APSInt Val, unsigned Scale)
Definition: Type.cpp:4156
bool isRestrict() const
Definition: Type.h:3699
bool isSugared() const
Definition: Type.h:6096
bool isSugared() const
Definition: Type.h:4435
static bool hasAttr(const FunctionDecl *D, bool IgnoreImplicitAttr)
Definition: SemaCUDA.cpp:98
void initialize(ArrayRef< ObjCProtocolDecl *> protocols)
Definition: Type.h:5581
bool hasExceptionSpec() const
Return whether this function has any kind of exception spec.
Definition: Type.h:3995
bool hasObjCPointerRepresentation() const
Whether this type can represent an objective pointer type for the purpose of GC&#39;ability.
Definition: Type.h:6921
bool isSugared() const
Definition: Type.h:5178
QualType desugar() const
Definition: Type.h:4533
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4756
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:1389
No ref-qualifier was provided.
Definition: Type.h:1403
bool isParameterPack() const
Definition: Type.h:4692
Qualifiers getMethodQuals() const
Definition: Type.h:4104
const TemplateTypeParmType * getReplacedParameter() const
Gets the template parameter that was substituted for.
Definition: Type.h:4802
QualType getEquivalentType() const
Definition: Type.h:4576
Expr * getNoexceptExpr() const
Return the expression inside noexcept(expression), or a null pointer if there is none (because the ex...
Definition: Type.h:4047
CanQual< Type > CanQualType
Represents a canonical, potentially-qualified type.
void Profile(llvm::FoldingSetNodeID &ID)
Definition: TemplateName.h:327
AttributedTypeBitfields AttributedTypeBits
Definition: Type.h:1770
bool hasRestrict() const
Definition: Type.h:270
QualType getInnerType() const
Definition: Type.h:2597
Qualifiers withoutObjCLifetime() const
Definition: Type.h:321
ExceptionSpecInfo(ExceptionSpecificationType EST)
Definition: Type.h:3831
bool isMemberFunctionPointerType() const
Definition: Type.h:6556
bool isObjCObjectPointerType() const
Definition: Type.h:6618
bool isAnyPointerType() const
Definition: Type.h:6508
bool isDecltypeType() const
Definition: Type.h:6673
is AltiVec &#39;vector bool ...&#39;
Definition: Type.h:3248
RefQualifierKind
The kind of C++11 ref-qualifier associated with a function type.
Definition: Type.h:1401
SplitQualType getSplitUnqualifiedType() const
Retrieve the unqualified variant of the given type, removing as little sugar as possible.
Definition: Type.h:6343
llvm::APInt APInt
Definition: Integral.h:27
ExtParameterInfo withHasPassObjectSize() const
Definition: Type.h:3481
NestedNameSpecifier * getQualifier() const
Retrieve the qualification on this type.
Definition: Type.h:5322
bool isFunctionProtoType() const
Definition: Type.h:2013
DestructionKind isDestructedType() const
Returns a nonzero value if objects of this type require non-trivial work to clean up after...
Definition: Type.h:1174
bool isSugared() const
Definition: Type.h:4578
is AltiVec vector
Definition: Type.h:3242
static bool classof(const Type *T)
Definition: Type.h:4516
AutoTypeKeyword getKeyword() const
Definition: Type.h:4920
bool isAddressSpaceOverlapping(const PointerType &other) const
Returns true if address spaces of pointers overlap.
Definition: Type.h:2637
Qualifiers getIndexTypeQualifiers() const
Definition: Type.h:2916
bool isFixedPointOrIntegerType() const
Return true if this is a fixed point or integer type.
Definition: Type.h:6832
TypeClass getTypeClass() const
Definition: Type.h:1876
Qualifiers & operator-=(Qualifiers R)
Definition: Type.h:551
ArrayRef< TemplateArgument > template_arguments() const
Definition: Type.h:5461
QualType getSuperClassType() const
Retrieve the type of the superclass of this object type.
Definition: Type.h:5822
bool isTargetAddressSpace(LangAS AS)
Definition: AddressSpaces.h:62
static bool isVectorSizeTooLarge(unsigned NumElements)
Definition: Type.h:3273
EnumDecl * getDecl() const
Definition: Type.h:4528
const char * getNameAsCString(const PrintingPolicy &Policy) const
Definition: Type.h:2498
bool isVectorType() const
Definition: Type.h:6606
__DEVICE__ void * memcpy(void *__a, const void *__b, size_t __c)
An rvalue ref-qualifier was provided (&&).
Definition: Type.h:1409
SourceRange getBracketsRange() const
Definition: Type.h:3121
void removeObjCGCAttr()
Definition: Type.h:311
void addFastQualifiers(unsigned TQs)
Definition: Type.h:850
TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits
Definition: Type.h:1780
Optional< unsigned > getNumExpansions() const
Retrieve the number of expansions that this pack expansion will generate, if known.
Definition: Type.h:5536
static QualType getFromOpaquePtr(const void *Ptr)
Definition: Type.h:701
void setVariablyModified(bool VM=true)
Definition: Type.h:1859
bool isCanonical() const
Definition: Type.h:6300
ParameterABI
Kinds of parameter ABI.
Definition: Specifiers.h:338
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:746
bool isInstantiationDependentType() const
Determine whether this type is an instantiation-dependent type, meaning that the type involves a temp...
Definition: Type.h:2156
bool isPtrSizeAddressSpace(LangAS AS)
Definition: AddressSpaces.h:76
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:6112
bool isTemplateTypeParmType() const
Definition: Type.h:6740
ExceptionSpecificationType getExceptionSpecType() const
Get the kind of exception specification on this function.
Definition: Type.h:3989
Represents a pointer type decayed from an array or function type.
Definition: Type.h:2699
The type is an Objective-C retainable pointer type that is qualified with the ARC __weak qualifier...
Definition: Type.h:1138
The injected class name of a C++ class template or class template partial specialization.
Definition: Type.h:5133
exception_iterator exception_begin() const
Definition: Type.h:4137
QualType getPointeeType() const
Definition: Type.h:3167
Represents a pack expansion of types.
Definition: Type.h:5511
Defines various enumerations that describe declaration and type specifiers.
bool isUndeducedAutoType() const
Definition: Type.h:6635
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:6751
unsigned getNumArgs() const
Retrieve the number of template arguments.
Definition: Type.h:4898
bool isObjCGCWeak() const
true when Type is objc&#39;s weak.
Definition: Type.h:1070
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:3071
QualType withVolatile() const
Definition: Type.h:834
friend bool operator!=(SplitQualType a, SplitQualType b)
Definition: Type.h:613
Represents a template argument.
Definition: TemplateBase.h:50
bool isDeduced() const
Definition: Type.h:4862
static bool classof(const Type *T)
Definition: Type.h:4535
Represents a type which was implicitly adjusted by the semantic engine for arbitrary reasons...
Definition: Type.h:2662
bool isPipeType() const
Definition: Type.h:6710
QualType withRestrict() const
Definition: Type.h:842
TagTypeKind
The kind of a tag type.
Definition: Type.h:5187
Optional< types::ID > Type
bool isObjCId() const
Definition: Type.h:5759
GC getObjCGCAttr() const
Definition: Type.h:307
StreamedQualTypeHelper stream(const PrintingPolicy &Policy, const Twine &PlaceHolder=Twine(), unsigned Indentation=0) const
Definition: Type.h:1046
Dataflow Directional Tag Classes.
bool isUnsaturatedFixedPointType() const
Return true if this is a saturated fixed point type according to ISO/IEC JTC1 SC22 WG14 N1169...
Definition: Type.h:6844
bool isSugared() const
Definition: Type.h:2681
SourceLocation getRBracketLoc() const
Definition: Type.h:3066
bool isFloat16Type() const
Definition: Type.h:6790
ExtInfo getExtInfo() const
Definition: Type.h:3691
bool isObjCIdOrClassType() const
True if this is equivalent to the &#39;id&#39; or &#39;Class&#39; type,.
Definition: Type.h:6024
not evaluated yet, for special member function
A qualifier set is used to build a set of qualifiers.
Definition: Type.h:6196
NestedNameSpecifier * getQualifier() const
Definition: Type.h:5446
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1271
void setContainsUnexpandedParameterPack(bool PP=true)
Definition: Type.h:1861
ExtParameterInfo withABI(ParameterABI kind) const
Definition: Type.h:3462
static bool classof(const Type *T)
Definition: Type.h:3742
TypeWithKeywordBitfields TypeWithKeywordBits
Definition: Type.h:1776
static std::string getName(const CallEvent &Call)
ArrayRef< QualType > getTypeArgs() const
Retrieve the type arguments for this type.
Definition: Type.h:6059
void removeLocalFastQualifiers()
Definition: Type.h:861
static bool classof(const Type *T)
Definition: Type.h:4820
static bool classof(const Type *T)
Definition: Type.h:4317
const TemplateArgument * getArgs() const
Retrieve the template arguments.
Definition: Type.h:5450
bool isObjCClassType() const
True if this is equivalent to the &#39;Class&#39; type, i.e.
Definition: Type.h:6019
QualType desugar() const
Definition: Type.h:6097
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:340
TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can)
Definition: Type.h:4246
bool isDependentAddressSpaceType() const
Definition: Type.h:6614
Interesting information about a specific parameter that can&#39;t simply be reflected in parameter&#39;s type...
Definition: Type.h:3448
StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, const Twine &PlaceHolder, unsigned Indentation)
Definition: Type.h:1034
bool hasLocalQualifiers() const
Determine whether this particular QualType instance has any qualifiers, without looking through any t...
Definition: Type.h:756
QualType getUnderlyingType() const
Definition: Type.h:4381
const Type * getBaseType() const
Definition: Type.h:1382
Represents a dependent using declaration which was marked with typename.
Definition: DeclCXX.h:3684
QualType desugar() const
Definition: Type.h:3215
Represents the declaration of an Objective-C type parameter.
Definition: DeclObjC.h:571
VectorKind getVectorKind() const
Definition: Type.h:3280
ArrayRef< QualType > exceptions() const
Definition: Type.h:4133
static std::string getAsString(SplitQualType split, const PrintingPolicy &Policy)
Definition: Type.h:990
The "union" keyword introduces the elaborated-type-specifier.
Definition: Type.h:5214
bool isBooleanType() const
Definition: Type.h:6894
const Type * strip(QualType type)
Collect any qualifiers on the given type and return an unqualified type.
Definition: Type.h:6203
The fast qualifier mask.
Definition: Type.h:189
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3221
Qualifiers withoutAddressSpace() const
Definition: Type.h:326
const ObjCObjectType * getObjectType() const
Gets the type pointed to by this ObjC pointer.
Definition: Type.h:5992
The "class" keyword introduces the elaborated-type-specifier.
Definition: Type.h:5217
friend raw_ostream & operator<<(raw_ostream &OS, const StreamedQualTypeHelper &SQT)
Definition: Type.h:1039
ReferenceTypeBitfields ReferenceTypeBits
Definition: Type.h:1775
Represents an enum.
Definition: Decl.h:3481
FunctionType::ExtInfo getFunctionExtInfo(const Type &t)
Definition: Type.h:6404
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:2779
QualType(const ExtQuals *Ptr, unsigned Quals)
Definition: Type.h:679
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2833
QualType desugar() const
Definition: Type.h:5835
QualType getCallResultType(const ASTContext &Context) const
Determine the type of an expression that calls a function of this type.
Definition: Type.h:3703
bool hasObjCLifetime() const
Definition: Type.h:332
SplitQualType getSingleStepDesugaredType() const
Definition: Type.h:6249
void setCVRQualifiers(unsigned mask)
Definition: Type.h:279
static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New)
Definition: Type.h:2688
friend bool operator<(const QualType &LHS, const QualType &RHS)
Definition: Type.h:986
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, Optional< unsigned > NumExpansions)
Definition: Type.h:5549
ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI)
Definition: Type.h:3852
const TemplateTypeParmType * getReplacedParameter() const
Gets the template parameter that was substituted for.
Definition: Type.h:4743
bool isSugared() const
Definition: Type.h:2806
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4703
bool isUndeducedType() const
Determine whether this type is an undeduced type, meaning that it somehow involves a C++11 &#39;auto&#39; typ...
Definition: Type.h:6900
Qualifiers::ObjCLifetime getObjCLifetime() const
Definition: Type.h:1375
static bool classof(const Type *T)
Definition: Type.h:3217
void Profile(llvm::FoldingSetNodeID &ID) const
Definition: Type.h:571
void addConsistentQualifiers(Qualifiers qs)
Add the qualifiers from the given set to this set, given that they don&#39;t conflict.
Definition: Type.h:459
bool hasCVRQualifiers() const
Definition: Type.h:275
bool isObjCUnqualifiedIdOrClass() const
Definition: Type.h:5769
void addConst()
Definition: Type.h:263
QualType getUnderlyingType() const
Definition: Type.h:4438
void removeCVRQualifiers()
Definition: Type.h:287
QualType getModifiedType() const
Definition: Type.h:4575
iterator begin() const
Definition: Type.h:5055
static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead)
Definition: Type.h:6183
bool isSugared() const
Definition: Type.h:4532
Represents a pointer to an Objective C object.
Definition: Type.h:5951
Pointer to a block type.
Definition: Type.h:2716
static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, UTTKind UKind)
Definition: Type.h:4464
static bool classof(const Type *T)
Definition: Type.h:4716
bool isUnspecializedAsWritten() const
Determine whether this object type is "unspecialized" as written, meaning that it has no type argumen...
Definition: Type.h:5798
FunctionTypeBitfields FunctionTypeBits
Definition: Type.h:1773
bool isIncompleteArrayType() const
Definition: Type.h:6578
FunctionDecl * SourceTemplate
The function template whose exception specification this is instantiated from, for EST_Uninstantiated...
Definition: Type.h:3827
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4495
Complex values, per C99 6.2.5p11.
Definition: Type.h:2554
unsigned getIndexTypeCVRQualifiers() const
Definition: Type.h:2920
static bool classof(const Type *T)
Definition: Type.h:4194
unsigned getNumArgs() const
Retrieve the number of template arguments.
Definition: Type.h:5067
static bool classof(const Type *T)
Definition: Type.h:2580
bool isObjCQualifiedId() const
Definition: Type.h:5776
static bool classof(const OMPClause *T)
bool empty() const
Definition: Type.h:421
ObjCInterfaceDecl * getInterfaceDecl() const
If this pointer points to an Objective @interface type, gets the declaration for that interface...
Definition: Type.h:6007
QualType getCanonicalTypeInternal() const
Definition: Type.h:2429
AutoTypeBitfields AutoTypeBits
Definition: Type.h:1771
static bool classof(const Type *T)
Definition: Type.h:4642
bool isReserveIDT() const
Definition: Type.h:6699
unsigned getCVRUQualifiers() const
Definition: Type.h:277
bool isIntegerType() const
isIntegerType() does not include complex integers (a GCC extension).
Definition: Type.h:6811
bool hasNonTrivialObjCLifetime() const
Definition: Type.h:1084
void addRestrict()
Definition: Type.h:273
bool isFromAST() const
Whether this type comes from an AST file.
Definition: Type.h:1879
friend TrailingObjects
Definition: OpenMPClause.h:98
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:3012
static bool classof(const Type *T)
Definition: Type.h:2825
const llvm::APInt & getSize() const
Definition: Type.h:2958
bool isImageType() const
Definition: Type.h:6703
Kind getAttrKind() const
Definition: Type.h:4571
bool isAtomicType() const
Definition: Type.h:6631
bool isFunctionType() const
Definition: Type.h:6500
bool hasNonFastQualifiers() const
Return true if the set contains any qualifiers which require an ExtQuals node to be allocated...
Definition: Type.h:412
bool isAddressSpaceSupersetOf(Qualifiers other) const
Returns true if the address space in these qualifiers is equal to or a superset of the address space ...
Definition: Type.h:489
VectorTypeBitfields VectorTypeBits
Definition: Type.h:1778
bool isObjCQualifiedIdType() const
Definition: Type.h:6639
std::integral_constant< bool, std::is_same< T, ArrayType >::value||std::is_base_of< ArrayType, T >::value > TypeIsArrayType
Definition: Type.h:6999
static bool classof(const Type *T)
Definition: Type.h:5412
llvm::iterator_range< qual_iterator > qual_range
Definition: Type.h:6072
ExtVectorType - Extended vector type.
Definition: Type.h:3354
bool isInteger() const
Definition: Type.h:2508
Base for LValueReferenceType and RValueReferenceType.
Definition: Type.h:2750
SourceRange getBracketsRange() const
Definition: Type.h:3064
const Expr * getSizeExpr() const
Definition: Type.h:2959
bool isVolatile() const
Definition: Type.h:3698
QualType desugar() const
Definition: Type.h:5179
qual_range quals() const
Definition: Type.h:6074
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
Holds information about the various types of exception specification.
Definition: Type.h:3811
QualType getUnderlyingType() const
Definition: Type.h:4358
static bool classof(const Type *T)
Definition: Type.h:6188
static bool classof(const Type *T)
Definition: Type.h:5097
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
The "class" keyword.
Definition: Type.h:5198
bool isConstantArrayType() const
Definition: Type.h:6574
QualType getNonLValueExprType(const ASTContext &Context) const
Determine the type of a (typically non-lvalue) expression with the specified result type...
Definition: Type.cpp:2915
bool hasAddressSpace() const
Check if this type has any address space qualifier.
Definition: Type.h:6372
static clang::QualType getFromVoidPointer(void *P)
Definition: Type.h:1294
const Type * getTypePtrOrNull() const
Definition: Type.h:6260
bool isObjectType() const
Determine whether this type is an object type.
Definition: Type.h:1931
ArrayRef< QualType > Exceptions
Explicitly-specified list of exception types.
Definition: Type.h:3816
bool isSugared() const
Definition: Type.h:4188
bool isObjCObjectType() const
Definition: Type.h:6622
bool hasObjCGCAttr() const
Definition: Type.h:306
The type-property cache.
Definition: Type.cpp:3579
QualType desugar() const
Definition: Type.h:3413
bool hasNoexceptExceptionSpec() const
Return whether this function has a noexcept exception spec.
Definition: Type.h:4003
QualType withCVRQualifiers(unsigned CVR) const
Definition: Type.h:846
bool isLValueReferenceType() const
Definition: Type.h:6520
VectorType::VectorKind getVectorKind() const
Definition: Type.h:3328
bool isSugared() const
Definition: Type.h:6142
TypedefNameDecl * getDecl() const
Definition: Type.h:4256
TypeBitfields TypeBits
Definition: Type.h:1767
Reading or writing from this object requires a barrier call.
Definition: Type.h:174
bool isQueueT() const
Definition: Type.h:6695
Expr * NoexceptExpr
Noexcept expression, if this is a computed noexcept specification.
Definition: Type.h:3819
bool isSugared() const
Definition: Type.h:2599
static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, const Type *Class)
Definition: Type.h:2877
unsigned getDepth() const
Definition: Type.h:4690
An attributed type is a type to which a type attribute has been applied.
Definition: Type.h:4550
QualType getParamType(unsigned i) const
Definition: Type.h:3966
Represents a type parameter type in Objective C.
Definition: Type.h:5620
bool isCanonicalAsParam() const
Definition: Type.h:6304
CallingConv getCallConv() const
Definition: Type.h:3690
Defines the clang::SourceLocation class and associated facilities.
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4960
QualType desugar() const
Definition: Type.h:3069
QualType getAliasedType() const
Get the aliased type, if this is a specialization of a type alias template.
Definition: Type.h:5048
QualType getUnqualifiedType() const
Retrieve the unqualified variant of the given type, removing as little sugar as possible.
Definition: Type.h:6336
bool hasUnaligned() const
Definition: Type.h:299
Represents a C++ struct/union/class.
Definition: DeclCXX.h:253
void removeLocalRestrict()
Definition: Type.h:6354
Represents a template specialization type whose template cannot be resolved, e.g. ...
Definition: Type.h:5420
ArrayRef< TemplateArgument > template_arguments() const
Definition: Type.h:5075
bool isMemberFunctionPointer() const
Returns true if the member type (i.e.
Definition: Type.h:2857
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:726
bool isVoidType() const
Definition: Type.h:6777
bool hasStrongOrWeakObjCLifetime() const
Definition: Type.h:1088
bool isSugared() const
Definition: Type.h:5542
qual_iterator qual_end() const
Definition: Type.h:6080
static bool classof(const Type *T)
Definition: Type.h:4767
Represents a C array with an unspecified size.
Definition: Type.h:2995
QualType desugar() const
Definition: Type.h:3126
SplitQualType(const Type *ty, Qualifiers qs)
Definition: Type.h:601
void removeFastQualifiers()
Definition: Type.h:402
static inline ::clang::Type * getFromVoidPointer(void *P)
Definition: Type.h:85
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6283
The parameter type of a method or function.
QualType getNamedType() const
Retrieve the type named by the qualified-id.
Definition: Type.h:5325
DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent, bool IsInstantiationDependent, bool ContainsParameterPack)
Definition: Type.h:4835
QualType getReplacementType() const
Gets the type that was substituted for the template parameter.
Definition: Type.h:4749
bool isSamplerT() const
Definition: Type.h:6683
The "enum" keyword.
Definition: Type.h:5201
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4334
static bool isAddressSpaceSupersetOf(LangAS A, LangAS B)
Returns true if address space A is equal to or a superset of B.
Definition: Type.h:476
qual_iterator qual_begin() const
Definition: Type.h:6076
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:60
This class is used for builtin types like &#39;int&#39;.
Definition: Type.h:2465
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:96
unsigned getRegParmType() const
Definition: Type.h:3683
static bool isCharType(QualType T)
bool qual_empty() const
Definition: Type.h:5598
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:4230
static bool classof(const Type *T)
Definition: Type.h:4366
SourceLocation getEllipsisLoc() const
Definition: Type.h:4088
Qualifiers getNonFastQualifiers() const
Definition: Type.h:413
QualType desugar() const
Definition: Type.h:2871
bool isVisibilityExplicit() const
Return true if the visibility was explicitly set is the code.
Definition: Type.h:2380
void removeLocalFastQualifiers(unsigned Mask)
Definition: Type.h:862
unsigned getCVRQualifiers() const
Definition: Type.h:276
bool isOCLIntelSubgroupAVCType() const
Definition: Type.h:6720
static Qualifiers fromCVRMask(unsigned CVR)
Definition: Type.h:236
SourceLocation getLBracketLoc() const
Definition: Type.h:3122
bool hasVolatile() const
Definition: Type.h:265
bool isSugared() const
Definition: Type.h:4513
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:947
unsigned getNumElements() const
Definition: Type.h:3271
QualType desugar() const
Definition: Type.h:5543
bool isFundamentalType() const
Tests whether the type is categorized as a fundamental type.
Definition: Type.h:6467
bool isReadOnly() const
Definition: Type.h:6192
Microsoft __declspec(nothrow) extension.
bool isDependentType() const
Whether this type is a dependent type, meaning that its definition somehow depends on a template para...
Definition: Type.h:2150
Represents an extended address space qualifier where the input address space value is dependent...
Definition: Type.h:3153
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:4996
bool isPointerType() const
Definition: Type.h:6504
static void Profile(llvm::FoldingSetNodeID &ID, QualType Element)
Definition: Type.h:2576
unsigned getAddressSpaceAttributePrintValue() const
Get the address space attribute value to be printed by diagnostics.
Definition: Type.h:366
void addAddressSpace(LangAS space)
Definition: Type.h:385
RecordType(const RecordDecl *D)
Definition: Type.h:4499
static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, ArraySizeModifier SizeMod, unsigned TypeQuals)
Definition: Type.h:3017
static SimpleType getSimplifiedValue(::clang::QualType Val)
Definition: Type.h:1282
QualType desugar() const
Definition: Type.h:3333
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:1338
#define true
Definition: stdbool.h:16
bool isConsumed() const
Is this parameter considered "consumed" by Objective-C ARC? Consumed parameters must have retainable ...
Definition: Type.h:3470
BuiltinTypeBitfields BuiltinTypeBits
Definition: Type.h:1772
static int getNumericAccessorIdx(char c)
Definition: Type.h:3371
A trivial tuple used to represent a source range.
This represents a decl that may have a name.
Definition: Decl.h:223
A simple holder for a QualType representing a type in an exception specification. ...
Definition: Type.h:3650
void addFastQualifiers(unsigned mask)
Definition: Type.h:405
bool isOpenCLSpecificType() const
Definition: Type.h:6735
FunctionDecl * getExceptionSpecTemplate() const
If this function type has an uninstantiated exception specification, this is the function whose excep...
Definition: Type.h:4068
Represents a C array with a specified size that is not an integer-constant-expression.
Definition: Type.h:3039
No keyword precedes the qualified type name.
Definition: Type.h:5227
bool isConstant(const ASTContext &Ctx) const
Definition: Type.h:789
static int getAccessorIdx(char c, bool isNumericAccessor)
Definition: Type.h:3399
SourceLocation getAttributeLoc() const
Definition: Type.h:3168
void Profile(llvm::FoldingSetNodeID &ID)
Definition: Type.h:6145
QualType getElementType() const
Definition: Type.h:3326
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context)
Definition: Type.h:5473
const ExtParameterInfo * getExtParameterInfosOrNull() const
Return a pointer to the beginning of the array of extra parameter information, if present...
Definition: Type.h:4161
ConceptDecl * getTypeConstraintConcept() const
Definition: Type.h:4908
bool isFunctionPointerType() const
Definition: Type.h:6538
friend bool operator==(SplitQualType a, SplitQualType b)
Definition: Type.h:610
static void Profile(llvm::FoldingSetNodeID &ID, UnresolvedUsingTypenameDecl *D)
Definition: Type.h:4234
void removeAddressSpace()
Definition: Type.h:384
SourceLocation getBegin() const
QualType desugar() const
Definition: Type.h:4514
QualifierCollector(Qualifiers Qs=Qualifiers())
Definition: Type.h:6198
bool operator!=(Qualifiers Other) const
Definition: Type.h:535
The "__interface" keyword introduces the elaborated-type-specifier.
Definition: Type.h:5211
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2935
ExceptionSpecInfo ExceptionSpec
Definition: Type.h:3843
bool isUnsignedInteger() const
Definition: Type.h:2516
static bool classof(const Type *T)
Definition: Type.h:5837
ExtInfo withRegParm(unsigned RegParm) const
Definition: Type.h:3632
A class which abstracts out some details necessary for making a call.
Definition: Type.h:3533
QualType desugar() const
Definition: Type.h:4579
static bool classof(const Type *T)
Definition: Type.h:3415
bool isIncompleteOrObjectType() const
Return true if this is an incomplete or object type, in other words, not a function type...
Definition: Type.h:1926
bool hasSizedVLAType() const
Whether this type involves a variable-length array type with a definite size.
Definition: Type.cpp:4103
static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, unsigned Index, bool ParameterPack, TemplateTypeParmDecl *TTPDecl)
Definition: Type.h:4707
QualType getPointeeType() const
Definition: Type.h:2853
QualType getType() const
Return the type wrapped by this type source info.
Definition: Type.h:6238
QualType desugar() const
Definition: Type.h:5652
noexcept(expression), evals to &#39;true&#39;
bool isSugared() const
Definition: Type.h:3277
const IdentifierInfo * getIdentifier() const
Definition: Type.h:5447
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1080
param_type_iterator param_type_end() const
Definition: Type.h:4127
static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, QualType Deduced, bool IsDependent)
Definition: Type.h:4964
bool isCompoundType() const
Tests whether the type is categorized as a compound type.
Definition: Type.h:6478
QualType getPointeeType() const
Gets the type pointed to by this ObjC pointer.
Definition: Type.h:5967
bool isSugared() const
Definition: Type.h:2964