Coverage Report

Created: 2021-01-23 06:44

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/AST/DeclCXX.h
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Source (jump to first uncovered line)
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//===- DeclCXX.h - Classes for representing C++ declarations --*- 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
/// Defines the C++ Decl subclasses, other than those for templates
11
/// (found in DeclTemplate.h) and friends (in DeclFriend.h).
12
//
13
//===----------------------------------------------------------------------===//
14
15
#ifndef LLVM_CLANG_AST_DECLCXX_H
16
#define LLVM_CLANG_AST_DECLCXX_H
17
18
#include "clang/AST/ASTUnresolvedSet.h"
19
#include "clang/AST/Decl.h"
20
#include "clang/AST/DeclBase.h"
21
#include "clang/AST/DeclarationName.h"
22
#include "clang/AST/Expr.h"
23
#include "clang/AST/ExternalASTSource.h"
24
#include "clang/AST/LambdaCapture.h"
25
#include "clang/AST/NestedNameSpecifier.h"
26
#include "clang/AST/Redeclarable.h"
27
#include "clang/AST/Stmt.h"
28
#include "clang/AST/Type.h"
29
#include "clang/AST/TypeLoc.h"
30
#include "clang/AST/UnresolvedSet.h"
31
#include "clang/Basic/LLVM.h"
32
#include "clang/Basic/Lambda.h"
33
#include "clang/Basic/LangOptions.h"
34
#include "clang/Basic/OperatorKinds.h"
35
#include "clang/Basic/SourceLocation.h"
36
#include "clang/Basic/Specifiers.h"
37
#include "llvm/ADT/ArrayRef.h"
38
#include "llvm/ADT/DenseMap.h"
39
#include "llvm/ADT/PointerIntPair.h"
40
#include "llvm/ADT/PointerUnion.h"
41
#include "llvm/ADT/STLExtras.h"
42
#include "llvm/ADT/TinyPtrVector.h"
43
#include "llvm/ADT/iterator_range.h"
44
#include "llvm/Support/Casting.h"
45
#include "llvm/Support/Compiler.h"
46
#include "llvm/Support/PointerLikeTypeTraits.h"
47
#include "llvm/Support/TrailingObjects.h"
48
#include <cassert>
49
#include <cstddef>
50
#include <iterator>
51
#include <memory>
52
#include <vector>
53
54
namespace clang {
55
56
class ASTContext;
57
class ClassTemplateDecl;
58
class ConstructorUsingShadowDecl;
59
class CXXBasePath;
60
class CXXBasePaths;
61
class CXXConstructorDecl;
62
class CXXDestructorDecl;
63
class CXXFinalOverriderMap;
64
class CXXIndirectPrimaryBaseSet;
65
class CXXMethodDecl;
66
class DecompositionDecl;
67
class DiagnosticBuilder;
68
class FriendDecl;
69
class FunctionTemplateDecl;
70
class IdentifierInfo;
71
class MemberSpecializationInfo;
72
class TemplateDecl;
73
class TemplateParameterList;
74
class UsingDecl;
75
76
/// Represents an access specifier followed by colon ':'.
77
///
78
/// An objects of this class represents sugar for the syntactic occurrence
79
/// of an access specifier followed by a colon in the list of member
80
/// specifiers of a C++ class definition.
81
///
82
/// Note that they do not represent other uses of access specifiers,
83
/// such as those occurring in a list of base specifiers.
84
/// Also note that this class has nothing to do with so-called
85
/// "access declarations" (C++98 11.3 [class.access.dcl]).
86
class AccessSpecDecl : public Decl {
87
  /// The location of the ':'.
88
  SourceLocation ColonLoc;
89
90
  AccessSpecDecl(AccessSpecifier AS, DeclContext *DC,
91
                 SourceLocation ASLoc, SourceLocation ColonLoc)
92
342k
    : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) {
93
342k
    setAccess(AS);
94
342k
  }
95
96
36.4k
  AccessSpecDecl(EmptyShell Empty) : Decl(AccessSpec, Empty) {}
97
98
  virtual void anchor();
99
100
public:
101
  /// The location of the access specifier.
102
165k
  SourceLocation getAccessSpecifierLoc() const { return getLocation(); }
103
104
  /// Sets the location of the access specifier.
105
0
  void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); }
106
107
  /// The location of the colon following the access specifier.
108
214k
  SourceLocation getColonLoc() const { return ColonLoc; }
109
110
  /// Sets the location of the colon.
111
36.4k
  void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; }
112
113
429
  SourceRange getSourceRange() const override LLVM_READONLY {
114
429
    return SourceRange(getAccessSpecifierLoc(), getColonLoc());
115
429
  }
116
117
  static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS,
118
                                DeclContext *DC, SourceLocation ASLoc,
119
342k
                                SourceLocation ColonLoc) {
120
342k
    return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc);
121
342k
  }
122
123
  static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
124
125
  // Implement isa/cast/dyncast/etc.
126
21.8k
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
127
21.8k
  static bool classofKind(Kind K) { return K == AccessSpec; }
128
};
129
130
/// Represents a base class of a C++ class.
131
///
132
/// Each CXXBaseSpecifier represents a single, direct base class (or
133
/// struct) of a C++ class (or struct). It specifies the type of that
134
/// base class, whether it is a virtual or non-virtual base, and what
135
/// level of access (public, protected, private) is used for the
136
/// derivation. For example:
137
///
138
/// \code
139
///   class A { };
140
///   class B { };
141
///   class C : public virtual A, protected B { };
142
/// \endcode
143
///
144
/// In this code, C will have two CXXBaseSpecifiers, one for "public
145
/// virtual A" and the other for "protected B".
146
class CXXBaseSpecifier {
147
  /// The source code range that covers the full base
148
  /// specifier, including the "virtual" (if present) and access
149
  /// specifier (if present).
150
  SourceRange Range;
151
152
  /// The source location of the ellipsis, if this is a pack
153
  /// expansion.
154
  SourceLocation EllipsisLoc;
155
156
  /// Whether this is a virtual base class or not.
157
  unsigned Virtual : 1;
158
159
  /// Whether this is the base of a class (true) or of a struct (false).
160
  ///
161
  /// This determines the mapping from the access specifier as written in the
162
  /// source code to the access specifier used for semantic analysis.
163
  unsigned BaseOfClass : 1;
164
165
  /// Access specifier as written in the source code (may be AS_none).
166
  ///
167
  /// The actual type of data stored here is an AccessSpecifier, but we use
168
  /// "unsigned" here to work around a VC++ bug.
169
  unsigned Access : 2;
170
171
  /// Whether the class contains a using declaration
172
  /// to inherit the named class's constructors.
173
  unsigned InheritConstructors : 1;
174
175
  /// The type of the base class.
176
  ///
177
  /// This will be a class or struct (or a typedef of such). The source code
178
  /// range does not include the \c virtual or the access specifier.
179
  TypeSourceInfo *BaseTypeInfo;
180
181
public:
182
540k
  CXXBaseSpecifier() = default;
183
  CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A,
184
                   TypeSourceInfo *TInfo, SourceLocation EllipsisLoc)
185
    : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC),
186
477k
      Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) {}
187
188
  /// Retrieves the source range that contains the entire base specifier.
189
508k
  SourceRange getSourceRange() const LLVM_READONLY { return Range; }
190
85.2k
  SourceLocation getBeginLoc() const LLVM_READONLY { return Range.getBegin(); }
191
12
  SourceLocation getEndLoc() const LLVM_READONLY { return Range.getEnd(); }
192
193
  /// Get the location at which the base class type was written.
194
35.2k
  SourceLocation getBaseTypeLoc() const LLVM_READONLY {
195
35.2k
    return BaseTypeInfo->getTypeLoc().getBeginLoc();
196
35.2k
  }
197
198
  /// Determines whether the base class is a virtual base class (or not).
199
8.98M
  bool isVirtual() const { return Virtual; }
200
201
  /// Determine whether this base class is a base of a class declared
202
  /// with the 'class' keyword (vs. one declared with the 'struct' keyword).
203
46.8k
  bool isBaseOfClass() const { return BaseOfClass; }
204
205
  /// Determine whether this base specifier is a pack expansion.
206
267k
  bool isPackExpansion() const { return EllipsisLoc.isValid(); }
207
208
  /// Determine whether this base class's constructors get inherited.
209
24.2k
  bool getInheritConstructors() const { return InheritConstructors; }
210
211
  /// Set that this base class's constructors should be inherited.
212
37.8k
  void setInheritConstructors(bool Inherit = true) {
213
37.8k
    InheritConstructors = Inherit;
214
37.8k
  }
215
216
  /// For a pack expansion, determine the location of the ellipsis.
217
1.72k
  SourceLocation getEllipsisLoc() const {
218
1.72k
    return EllipsisLoc;
219
1.72k
  }
220
221
  /// Returns the access specifier for this base specifier.
222
  ///
223
  /// This is the actual base specifier as used for semantic analysis, so
224
  /// the result can never be AS_none. To retrieve the access specifier as
225
  /// written in the source code, use getAccessSpecifierAsWritten().
226
1.80M
  AccessSpecifier getAccessSpecifier() const {
227
1.80M
    if ((AccessSpecifier)Access == AS_none)
228
596k
      return BaseOfClass? 
AS_private5.85k
:
AS_public590k
;
229
1.21M
    else
230
1.21M
      return (AccessSpecifier)Access;
231
1.80M
  }
232
233
  /// Retrieves the access specifier as written in the source code
234
  /// (which may mean that no access specifier was explicitly written).
235
  ///
236
  /// Use getAccessSpecifier() to retrieve the access specifier for use in
237
  /// semantic analysis.
238
274k
  AccessSpecifier getAccessSpecifierAsWritten() const {
239
274k
    return (AccessSpecifier)Access;
240
274k
  }
241
242
  /// Retrieves the type of the base class.
243
  ///
244
  /// This type will always be an unqualified class type.
245
18.4M
  QualType getType() const {
246
18.4M
    return BaseTypeInfo->getType().getUnqualifiedType();
247
18.4M
  }
248
249
  /// Retrieves the type and source location of the base class.
250
289k
  TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; }
251
};
252
253
/// Represents a C++ struct/union/class.
254
class CXXRecordDecl : public RecordDecl {
255
  friend class ASTDeclReader;
256
  friend class ASTDeclWriter;
257
  friend class ASTNodeImporter;
258
  friend class ASTReader;
259
  friend class ASTRecordWriter;
260
  friend class ASTWriter;
261
  friend class DeclContext;
262
  friend class LambdaExpr;
263
264
  friend void FunctionDecl::setPure(bool);
265
  friend void TagDecl::startDefinition();
266
267
  /// Values used in DefinitionData fields to represent special members.
268
  enum SpecialMemberFlags {
269
    SMF_DefaultConstructor = 0x1,
270
    SMF_CopyConstructor = 0x2,
271
    SMF_MoveConstructor = 0x4,
272
    SMF_CopyAssignment = 0x8,
273
    SMF_MoveAssignment = 0x10,
274
    SMF_Destructor = 0x20,
275
    SMF_All = 0x3f
276
  };
277
278
  struct DefinitionData {
279
    #define FIELD(Name, Width, Merge) \
280
    unsigned Name : Width;
281
    #include "CXXRecordDeclDefinitionBits.def"
282
283
    /// Whether this class describes a C++ lambda.
284
    unsigned IsLambda : 1;
285
286
    /// Whether we are currently parsing base specifiers.
287
    unsigned IsParsingBaseSpecifiers : 1;
288
289
    /// True when visible conversion functions are already computed
290
    /// and are available.
291
    unsigned ComputedVisibleConversions : 1;
292
293
    unsigned HasODRHash : 1;
294
295
    /// A hash of parts of the class to help in ODR checking.
296
    unsigned ODRHash = 0;
297
298
    /// The number of base class specifiers in Bases.
299
    unsigned NumBases = 0;
300
301
    /// The number of virtual base class specifiers in VBases.
302
    unsigned NumVBases = 0;
303
304
    /// Base classes of this class.
305
    ///
306
    /// FIXME: This is wasted space for a union.
307
    LazyCXXBaseSpecifiersPtr Bases;
308
309
    /// direct and indirect virtual base classes of this class.
310
    LazyCXXBaseSpecifiersPtr VBases;
311
312
    /// The conversion functions of this C++ class (but not its
313
    /// inherited conversion functions).
314
    ///
315
    /// Each of the entries in this overload set is a CXXConversionDecl.
316
    LazyASTUnresolvedSet Conversions;
317
318
    /// The conversion functions of this C++ class and all those
319
    /// inherited conversion functions that are visible in this class.
320
    ///
321
    /// Each of the entries in this overload set is a CXXConversionDecl or a
322
    /// FunctionTemplateDecl.
323
    LazyASTUnresolvedSet VisibleConversions;
324
325
    /// The declaration which defines this record.
326
    CXXRecordDecl *Definition;
327
328
    /// The first friend declaration in this class, or null if there
329
    /// aren't any.
330
    ///
331
    /// This is actually currently stored in reverse order.
332
    LazyDeclPtr FirstFriend;
333
334
    DefinitionData(CXXRecordDecl *D);
335
336
    /// Retrieve the set of direct base classes.
337
40.7M
    CXXBaseSpecifier *getBases() const {
338
40.7M
      if (!Bases.isOffset())
339
40.7M
        return Bases.get(nullptr);
340
33.8k
      return getBasesSlowCase();
341
33.8k
    }
342
343
    /// Retrieve the set of virtual base classes.
344
2.99M
    CXXBaseSpecifier *getVBases() const {
345
2.99M
      if (!VBases.isOffset())
346
2.99M
        return VBases.get(nullptr);
347
14
      return getVBasesSlowCase();
348
14
    }
349
350
20.8k
    ArrayRef<CXXBaseSpecifier> bases() const {
351
20.8k
      return llvm::makeArrayRef(getBases(), NumBases);
352
20.8k
    }
353
354
117
    ArrayRef<CXXBaseSpecifier> vbases() const {
355
117
      return llvm::makeArrayRef(getVBases(), NumVBases);
356
117
    }
357
358
  private:
359
    CXXBaseSpecifier *getBasesSlowCase() const;
360
    CXXBaseSpecifier *getVBasesSlowCase() const;
361
  };
362
363
  struct DefinitionData *DefinitionData;
364
365
  /// Describes a C++ closure type (generated by a lambda expression).
366
  struct LambdaDefinitionData : public DefinitionData {
367
    using Capture = LambdaCapture;
368
369
    /// Whether this lambda is known to be dependent, even if its
370
    /// context isn't dependent.
371
    ///
372
    /// A lambda with a non-dependent context can be dependent if it occurs
373
    /// within the default argument of a function template, because the
374
    /// lambda will have been created with the enclosing context as its
375
    /// declaration context, rather than function. This is an unfortunate
376
    /// artifact of having to parse the default arguments before.
377
    unsigned Dependent : 1;
378
379
    /// Whether this lambda is a generic lambda.
380
    unsigned IsGenericLambda : 1;
381
382
    /// The Default Capture.
383
    unsigned CaptureDefault : 2;
384
385
    /// The number of captures in this lambda is limited 2^NumCaptures.
386
    unsigned NumCaptures : 15;
387
388
    /// The number of explicit captures in this lambda.
389
    unsigned NumExplicitCaptures : 13;
390
391
    /// Has known `internal` linkage.
392
    unsigned HasKnownInternalLinkage : 1;
393
394
    /// The number used to indicate this lambda expression for name
395
    /// mangling in the Itanium C++ ABI.
396
    unsigned ManglingNumber : 31;
397
398
    /// The declaration that provides context for this lambda, if the
399
    /// actual DeclContext does not suffice. This is used for lambdas that
400
    /// occur within default arguments of function parameters within the class
401
    /// or within a data member initializer.
402
    LazyDeclPtr ContextDecl;
403
404
    /// The list of captures, both explicit and implicit, for this
405
    /// lambda.
406
    Capture *Captures = nullptr;
407
408
    /// The type of the call method.
409
    TypeSourceInfo *MethodTyInfo;
410
411
    LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info, bool Dependent,
412
                         bool IsGeneric, LambdaCaptureDefault CaptureDefault)
413
        : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric),
414
          CaptureDefault(CaptureDefault), NumCaptures(0),
415
          NumExplicitCaptures(0), HasKnownInternalLinkage(0), ManglingNumber(0),
416
10.3k
          MethodTyInfo(Info) {
417
10.3k
      IsLambda = true;
418
419
      // C++1z [expr.prim.lambda]p4:
420
      //   This class type is not an aggregate type.
421
10.3k
      Aggregate = false;
422
10.3k
      PlainOldData = false;
423
10.3k
    }
424
  };
425
426
265M
  struct DefinitionData *dataPtr() const {
427
    // Complete the redecl chain (if necessary).
428
265M
    getMostRecentDecl();
429
265M
    return DefinitionData;
430
265M
  }
431
432
264M
  struct DefinitionData &data() const {
433
264M
    auto *DD = dataPtr();
434
264M
    assert(DD && "queried property of class with no definition");
435
264M
    return *DD;
436
264M
  }
437
438
762k
  struct LambdaDefinitionData &getLambdaData() const {
439
    // No update required: a merged definition cannot change any lambda
440
    // properties.
441
762k
    auto *DD = DefinitionData;
442
762k
    assert(DD && DD->IsLambda && "queried lambda property of non-lambda class");
443
762k
    return static_cast<LambdaDefinitionData&>(*DD);
444
762k
  }
445
446
  /// The template or declaration that this declaration
447
  /// describes or was instantiated from, respectively.
448
  ///
449
  /// For non-templates, this value will be null. For record
450
  /// declarations that describe a class template, this will be a
451
  /// pointer to a ClassTemplateDecl. For member
452
  /// classes of class template specializations, this will be the
453
  /// MemberSpecializationInfo referring to the member class that was
454
  /// instantiated or specialized.
455
  llvm::PointerUnion<ClassTemplateDecl *, MemberSpecializationInfo *>
456
      TemplateOrInstantiation;
457
458
  /// Called from setBases and addedMember to notify the class that a
459
  /// direct or virtual base class or a member of class type has been added.
460
  void addedClassSubobject(CXXRecordDecl *Base);
461
462
  /// Notify the class that member has been added.
463
  ///
464
  /// This routine helps maintain information about the class based on which
465
  /// members have been added. It will be invoked by DeclContext::addDecl()
466
  /// whenever a member is added to this record.
467
  void addedMember(Decl *D);
468
469
  void markedVirtualFunctionPure();
470
471
  /// Get the head of our list of friend declarations, possibly
472
  /// deserializing the friends from an external AST source.
473
  FriendDecl *getFirstFriend() const;
474
475
  /// Determine whether this class has an empty base class subobject of type X
476
  /// or of one of the types that might be at offset 0 within X (per the C++
477
  /// "standard layout" rules).
478
  bool hasSubobjectAtOffsetZeroOfEmptyBaseType(ASTContext &Ctx,
479
                                               const CXXRecordDecl *X);
480
481
protected:
482
  CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC,
483
                SourceLocation StartLoc, SourceLocation IdLoc,
484
                IdentifierInfo *Id, CXXRecordDecl *PrevDecl);
485
486
public:
487
  /// Iterator that traverses the base classes of a class.
488
  using base_class_iterator = CXXBaseSpecifier *;
489
490
  /// Iterator that traverses the base classes of a class.
491
  using base_class_const_iterator = const CXXBaseSpecifier *;
492
493
41.2M
  CXXRecordDecl *getCanonicalDecl() override {
494
41.2M
    return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl());
495
41.2M
  }
496
497
6.30M
  const CXXRecordDecl *getCanonicalDecl() const {
498
6.30M
    return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl();
499
6.30M
  }
500
501
3.27M
  CXXRecordDecl *getPreviousDecl() {
502
3.27M
    return cast_or_null<CXXRecordDecl>(
503
3.27M
            static_cast<RecordDecl *>(this)->getPreviousDecl());
504
3.27M
  }
505
506
248k
  const CXXRecordDecl *getPreviousDecl() const {
507
248k
    return const_cast<CXXRecordDecl*>(this)->getPreviousDecl();
508
248k
  }
509
510
267M
  CXXRecordDecl *getMostRecentDecl() {
511
267M
    return cast<CXXRecordDecl>(
512
267M
            static_cast<RecordDecl *>(this)->getMostRecentDecl());
513
267M
  }
514
515
265M
  const CXXRecordDecl *getMostRecentDecl() const {
516
265M
    return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl();
517
265M
  }
518
519
1.97M
  CXXRecordDecl *getMostRecentNonInjectedDecl() {
520
1.97M
    CXXRecordDecl *Recent =
521
1.97M
        static_cast<CXXRecordDecl *>(this)->getMostRecentDecl();
522
3.11M
    while (Recent->isInjectedClassName()) {
523
      // FIXME: Does injected class name need to be in the redeclarations chain?
524
1.13M
      assert(Recent->getPreviousDecl());
525
1.13M
      Recent = Recent->getPreviousDecl();
526
1.13M
    }
527
1.97M
    return Recent;
528
1.97M
  }
529
530
4.15k
  const CXXRecordDecl *getMostRecentNonInjectedDecl() const {
531
4.15k
    return const_cast<CXXRecordDecl*>(this)->getMostRecentNonInjectedDecl();
532
4.15k
  }
533
534
81.9M
  CXXRecordDecl *getDefinition() const {
535
    // We only need an update if we don't already know which
536
    // declaration is the definition.
537
81.1M
    auto *DD = DefinitionData ? DefinitionData : 
dataPtr()817k
;
538
81.1M
    return DD ? DD->Definition : 
nullptr817k
;
539
81.9M
  }
540
541
4.63M
  bool hasDefinition() const { return DefinitionData || 
dataPtr()192k
; }
542
543
  static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC,
544
                               SourceLocation StartLoc, SourceLocation IdLoc,
545
                               IdentifierInfo *Id,
546
                               CXXRecordDecl *PrevDecl = nullptr,
547
                               bool DelayTypeCreation = false);
548
  static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC,
549
                                     TypeSourceInfo *Info, SourceLocation Loc,
550
                                     bool DependentLambda, bool IsGeneric,
551
                                     LambdaCaptureDefault CaptureDefault);
552
  static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID);
553
554
4.34M
  bool isDynamicClass() const {
555
4.34M
    return data().Polymorphic || 
data().NumVBases != 04.18M
;
556
4.34M
  }
557
558
  /// @returns true if class is dynamic or might be dynamic because the
559
  /// definition is incomplete of dependent.
560
26
  bool mayBeDynamicClass() const {
561
26
    return !hasDefinition() || 
isDynamicClass()16
||
hasAnyDependentBases()3
;
562
26
  }
563
564
  /// @returns true if class is non dynamic or might be non dynamic because the
565
  /// definition is incomplete of dependent.
566
13
  bool mayBeNonDynamicClass() const {
567
13
    return !hasDefinition() || 
!isDynamicClass()5
||
hasAnyDependentBases()3
;
568
13
  }
569
570
194k
  void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; }
571
572
1.76k
  bool isParsingBaseSpecifiers() const {
573
1.76k
    return data().IsParsingBaseSpecifiers;
574
1.76k
  }
575
576
  unsigned getODRHash() const;
577
578
  /// Sets the base classes of this struct or class.
579
  void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases);
580
581
  /// Retrieves the number of base classes of this class.
582
922k
  unsigned getNumBases() const { return data().NumBases; }
583
584
  using base_class_range = llvm::iterator_range<base_class_iterator>;
585
  using base_class_const_range =
586
      llvm::iterator_range<base_class_const_iterator>;
587
588
2.71M
  base_class_range bases() {
589
2.71M
    return base_class_range(bases_begin(), bases_end());
590
2.71M
  }
591
13.8M
  base_class_const_range bases() const {
592
13.8M
    return base_class_const_range(bases_begin(), bases_end());
593
13.8M
  }
594
595
6.15M
  base_class_iterator bases_begin() { return data().getBases(); }
596
34.0M
  base_class_const_iterator bases_begin() const { return data().getBases(); }
597
2.96M
  base_class_iterator bases_end() { return bases_begin() + data().NumBases; }
598
17.0M
  base_class_const_iterator bases_end() const {
599
17.0M
    return bases_begin() + data().NumBases;
600
17.0M
  }
601
602
  /// Retrieves the number of virtual base classes of this class.
603
2.95M
  unsigned getNumVBases() const { return data().NumVBases; }
604
605
1.12M
  base_class_range vbases() {
606
1.12M
    return base_class_range(vbases_begin(), vbases_end());
607
1.12M
  }
608
365k
  base_class_const_range vbases() const {
609
365k
    return base_class_const_range(vbases_begin(), vbases_end());
610
365k
  }
611
612
2.24M
  base_class_iterator vbases_begin() { return data().getVBases(); }
613
747k
  base_class_const_iterator vbases_begin() const { return data().getVBases(); }
614
1.12M
  base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; }
615
373k
  base_class_const_iterator vbases_end() const {
616
373k
    return vbases_begin() + data().NumVBases;
617
373k
  }
618
619
  /// Determine whether this class has any dependent base classes which
620
  /// are not the current instantiation.
621
  bool hasAnyDependentBases() const;
622
623
  /// Iterator access to method members.  The method iterator visits
624
  /// all method members of the class, including non-instance methods,
625
  /// special methods, etc.
626
  using method_iterator = specific_decl_iterator<CXXMethodDecl>;
627
  using method_range =
628
      llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>>;
629
630
2.49M
  method_range methods() const {
631
2.49M
    return method_range(method_begin(), method_end());
632
2.49M
  }
633
634
  /// Method begin iterator.  Iterates in the order the methods
635
  /// were declared.
636
2.49M
  method_iterator method_begin() const {
637
2.49M
    return method_iterator(decls_begin());
638
2.49M
  }
639
640
  /// Method past-the-end iterator.
641
2.49M
  method_iterator method_end() const {
642
2.49M
    return method_iterator(decls_end());
643
2.49M
  }
644
645
  /// Iterator access to constructor members.
646
  using ctor_iterator = specific_decl_iterator<CXXConstructorDecl>;
647
  using ctor_range =
648
      llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>>;
649
650
5.78k
  ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); }
651
652
5.78k
  ctor_iterator ctor_begin() const {
653
5.78k
    return ctor_iterator(decls_begin());
654
5.78k
  }
655
656
5.78k
  ctor_iterator ctor_end() const {
657
5.78k
    return ctor_iterator(decls_end());
658
5.78k
  }
659
660
  /// An iterator over friend declarations.  All of these are defined
661
  /// in DeclFriend.h.
662
  class friend_iterator;
663
  using friend_range = llvm::iterator_range<friend_iterator>;
664
665
  friend_range friends() const;
666
  friend_iterator friend_begin() const;
667
  friend_iterator friend_end() const;
668
  void pushFriendDecl(FriendDecl *FD);
669
670
  /// Determines whether this record has any friends.
671
29
  bool hasFriends() const {
672
29
    return data().FirstFriend.isValid();
673
29
  }
674
675
  /// \c true if a defaulted copy constructor for this class would be
676
  /// deleted.
677
974k
  bool defaultedCopyConstructorIsDeleted() const {
678
974k
    assert((!needsOverloadResolutionForCopyConstructor() ||
679
974k
            (data().DeclaredSpecialMembers & SMF_CopyConstructor)) &&
680
974k
           "this property has not yet been computed by Sema");
681
974k
    return data().DefaultedCopyConstructorIsDeleted;
682
974k
  }
683
684
  /// \c true if a defaulted move constructor for this class would be
685
  /// deleted.
686
945k
  bool defaultedMoveConstructorIsDeleted() const {
687
945k
    assert((!needsOverloadResolutionForMoveConstructor() ||
688
945k
            (data().DeclaredSpecialMembers & SMF_MoveConstructor)) &&
689
945k
           "this property has not yet been computed by Sema");
690
945k
    return data().DefaultedMoveConstructorIsDeleted;
691
945k
  }
692
693
  /// \c true if a defaulted destructor for this class would be deleted.
694
970k
  bool defaultedDestructorIsDeleted() const {
695
970k
    assert((!needsOverloadResolutionForDestructor() ||
696
970k
            (data().DeclaredSpecialMembers & SMF_Destructor)) &&
697
970k
           "this property has not yet been computed by Sema");
698
970k
    return data().DefaultedDestructorIsDeleted;
699
970k
  }
700
701
  /// \c true if we know for sure that this class has a single,
702
  /// accessible, unambiguous copy constructor that is not deleted.
703
706k
  bool hasSimpleCopyConstructor() const {
704
706k
    return !hasUserDeclaredCopyConstructor() &&
705
686k
           !data().DefaultedCopyConstructorIsDeleted;
706
706k
  }
707
708
  /// \c true if we know for sure that this class has a single,
709
  /// accessible, unambiguous move constructor that is not deleted.
710
706k
  bool hasSimpleMoveConstructor() const {
711
706k
    return !hasUserDeclaredMoveConstructor() && 
hasMoveConstructor()698k
&&
712
671k
           !data().DefaultedMoveConstructorIsDeleted;
713
706k
  }
714
715
  /// \c true if we know for sure that this class has a single,
716
  /// accessible, unambiguous copy assignment operator that is not deleted.
717
706k
  bool hasSimpleCopyAssignment() const {
718
706k
    return !hasUserDeclaredCopyAssignment() &&
719
690k
           !data().DefaultedCopyAssignmentIsDeleted;
720
706k
  }
721
722
  /// \c true if we know for sure that this class has a single,
723
  /// accessible, unambiguous move assignment operator that is not deleted.
724
706k
  bool hasSimpleMoveAssignment() const {
725
706k
    return !hasUserDeclaredMoveAssignment() && 
hasMoveAssignment()699k
&&
726
671k
           !data().DefaultedMoveAssignmentIsDeleted;
727
706k
  }
728
729
  /// \c true if we know for sure that this class has an accessible
730
  /// destructor that is not deleted.
731
706k
  bool hasSimpleDestructor() const {
732
706k
    return !hasUserDeclaredDestructor() &&
733
675k
           !data().DefaultedDestructorIsDeleted;
734
706k
  }
735
736
  /// Determine whether this class has any default constructors.
737
962k
  bool hasDefaultConstructor() const {
738
962k
    return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) ||
739
693k
           needsImplicitDefaultConstructor();
740
962k
  }
741
742
  /// Determine if we need to declare a default constructor for
743
  /// this class.
744
  ///
745
  /// This value is used for lazy creation of default constructors.
746
3.25M
  bool needsImplicitDefaultConstructor() const {
747
3.25M
    return (!data().UserDeclaredConstructor &&
748
2.66M
            !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) &&
749
2.55M
            (!isLambda() || 
lambdaIsDefaultConstructibleAndAssignable()16.5k
)) ||
750
           // FIXME: Proposed fix to core wording issue: if a class inherits
751
           // a default constructor and doesn't explicitly declare one, one
752
           // is declared implicitly.
753
712k
           (data().HasInheritedDefaultConstructor &&
754
736
            !(data().DeclaredSpecialMembers & SMF_DefaultConstructor));
755
3.25M
  }
756
757
  /// Determine whether this class has any user-declared constructors.
758
  ///
759
  /// When true, a default constructor will not be implicitly declared.
760
1.15M
  bool hasUserDeclaredConstructor() const {
761
1.15M
    return data().UserDeclaredConstructor;
762
1.15M
  }
763
764
  /// Whether this class has a user-provided default constructor
765
  /// per C++11.
766
1.35k
  bool hasUserProvidedDefaultConstructor() const {
767
1.35k
    return data().UserProvidedDefaultConstructor;
768
1.35k
  }
769
770
  /// Determine whether this class has a user-declared copy constructor.
771
  ///
772
  /// When false, a copy constructor will be implicitly declared.
773
8.54M
  bool hasUserDeclaredCopyConstructor() const {
774
8.54M
    return data().UserDeclaredSpecialMembers & SMF_CopyConstructor;
775
8.54M
  }
776
777
  /// Determine whether this class needs an implicit copy
778
  /// constructor to be lazily declared.
779
3.24M
  bool needsImplicitCopyConstructor() const {
780
3.24M
    return !(data().DeclaredSpecialMembers & SMF_CopyConstructor);
781
3.24M
  }
782
783
  /// Determine whether we need to eagerly declare a defaulted copy
784
  /// constructor for this class.
785
2.20M
  bool needsOverloadResolutionForCopyConstructor() const {
786
    // C++17 [class.copy.ctor]p6:
787
    //   If the class definition declares a move constructor or move assignment
788
    //   operator, the implicitly declared copy constructor is defined as
789
    //   deleted.
790
    // In MSVC mode, sometimes a declared move assignment does not delete an
791
    // implicit copy constructor, so defer this choice to Sema.
792
2.20M
    if (data().UserDeclaredSpecialMembers &
793
2.20M
        (SMF_MoveConstructor | SMF_MoveAssignment))
794
9.83k
      return true;
795
2.19M
    return data().NeedOverloadResolutionForCopyConstructor;
796
2.19M
  }
797
798
  /// Determine whether an implicit copy constructor for this type
799
  /// would have a parameter with a const-qualified reference type.
800
641k
  bool implicitCopyConstructorHasConstParam() const {
801
641k
    return data().ImplicitCopyConstructorCanHaveConstParamForNonVBase &&
802
641k
           (isAbstract() ||
803
640k
            data().ImplicitCopyConstructorCanHaveConstParamForVBase);
804
641k
  }
805
806
  /// Determine whether this class has a copy constructor with
807
  /// a parameter type which is a reference to a const-qualified type.
808
704k
  bool hasCopyConstructorWithConstParam() const {
809
704k
    return data().HasDeclaredCopyConstructorWithConstParam ||
810
525k
           (needsImplicitCopyConstructor() &&
811
525k
            implicitCopyConstructorHasConstParam());
812
704k
  }
813
814
  /// Whether this class has a user-declared move constructor or
815
  /// assignment operator.
816
  ///
817
  /// When false, a move constructor and assignment operator may be
818
  /// implicitly declared.
819
0
  bool hasUserDeclaredMoveOperation() const {
820
0
    return data().UserDeclaredSpecialMembers &
821
0
             (SMF_MoveConstructor | SMF_MoveAssignment);
822
0
  }
823
824
  /// Determine whether this class has had a move constructor
825
  /// declared by the user.
826
3.44M
  bool hasUserDeclaredMoveConstructor() const {
827
3.44M
    return data().UserDeclaredSpecialMembers & SMF_MoveConstructor;
828
3.44M
  }
829
830
  /// Determine whether this class has a move constructor.
831
3.20M
  bool hasMoveConstructor() const {
832
3.20M
    return (data().DeclaredSpecialMembers & SMF_MoveConstructor) ||
833
2.74M
           needsImplicitMoveConstructor();
834
3.20M
  }
835
836
  /// Set that we attempted to declare an implicit copy
837
  /// constructor, but overload resolution failed so we deleted it.
838
9.48k
  void setImplicitCopyConstructorIsDeleted() {
839
9.48k
    assert((data().DefaultedCopyConstructorIsDeleted ||
840
9.48k
            needsOverloadResolutionForCopyConstructor()) &&
841
9.48k
           "Copy constructor should not be deleted");
842
9.48k
    data().DefaultedCopyConstructorIsDeleted = true;
843
9.48k
  }
844
845
  /// Set that we attempted to declare an implicit move
846
  /// constructor, but overload resolution failed so we deleted it.
847
1.82k
  void setImplicitMoveConstructorIsDeleted() {
848
1.82k
    assert((data().DefaultedMoveConstructorIsDeleted ||
849
1.82k
            needsOverloadResolutionForMoveConstructor()) &&
850
1.82k
           "move constructor should not be deleted");
851
1.82k
    data().DefaultedMoveConstructorIsDeleted = true;
852
1.82k
  }
853
854
  /// Set that we attempted to declare an implicit destructor,
855
  /// but overload resolution failed so we deleted it.
856
786
  void setImplicitDestructorIsDeleted() {
857
786
    assert((data().DefaultedDestructorIsDeleted ||
858
786
            needsOverloadResolutionForDestructor()) &&
859
786
           "destructor should not be deleted");
860
786
    data().DefaultedDestructorIsDeleted = true;
861
786
  }
862
863
  /// Determine whether this class should get an implicit move
864
  /// constructor or if any existing special member function inhibits this.
865
5.58M
  bool needsImplicitMoveConstructor() const {
866
5.58M
    return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) &&
867
5.18M
           !hasUserDeclaredCopyConstructor() &&
868
4.99M
           !hasUserDeclaredCopyAssignment() &&
869
4.98M
           !hasUserDeclaredMoveAssignment() &&
870
4.98M
           !hasUserDeclaredDestructor();
871
5.58M
  }
872
873
  /// Determine whether we need to eagerly declare a defaulted move
874
  /// constructor for this class.
875
2.10M
  bool needsOverloadResolutionForMoveConstructor() const {
876
2.10M
    return data().NeedOverloadResolutionForMoveConstructor;
877
2.10M
  }
878
879
  /// Determine whether this class has a user-declared copy assignment
880
  /// operator.
881
  ///
882
  /// When false, a copy assignment operator will be implicitly declared.
883
8.28M
  bool hasUserDeclaredCopyAssignment() const {
884
8.28M
    return data().UserDeclaredSpecialMembers & SMF_CopyAssignment;
885
8.28M
  }
886
887
  /// Set that we attempted to declare an implicit copy assignment
888
  /// operator, but overload resolution failed so we deleted it.
889
11.1k
  void setImplicitCopyAssignmentIsDeleted() {
890
11.1k
    assert((data().DefaultedCopyAssignmentIsDeleted ||
891
11.1k
            needsOverloadResolutionForCopyAssignment()) &&
892
11.1k
           "copy assignment should not be deleted");
893
11.1k
    data().DefaultedCopyAssignmentIsDeleted = true;
894
11.1k
  }
895
896
  /// Determine whether this class needs an implicit copy
897
  /// assignment operator to be lazily declared.
898
1.81M
  bool needsImplicitCopyAssignment() const {
899
1.81M
    return !(data().DeclaredSpecialMembers & SMF_CopyAssignment);
900
1.81M
  }
901
902
  /// Determine whether we need to eagerly declare a defaulted copy
903
  /// assignment operator for this class.
904
1.05M
  bool needsOverloadResolutionForCopyAssignment() const {
905
    // C++20 [class.copy.assign]p2:
906
    //   If the class definition declares a move constructor or move assignment
907
    //   operator, the implicitly declared copy assignment operator is defined
908
    //   as deleted.
909
    // In MSVC mode, sometimes a declared move constructor does not delete an
910
    // implicit copy assignment, so defer this choice to Sema.
911
1.05M
    if (data().UserDeclaredSpecialMembers &
912
1.05M
        (SMF_MoveConstructor | SMF_MoveAssignment))
913
8.51k
      return true;
914
1.04M
    return data().NeedOverloadResolutionForCopyAssignment;
915
1.04M
  }
916
917
  /// Determine whether an implicit copy assignment operator for this
918
  /// type would have a parameter with a const-qualified reference type.
919
709k
  bool implicitCopyAssignmentHasConstParam() const {
920
709k
    return data().ImplicitCopyAssignmentHasConstParam;
921
709k
  }
922
923
  /// Determine whether this class has a copy assignment operator with
924
  /// a parameter type which is a reference to a const-qualified type or is not
925
  /// a reference.
926
701k
  bool hasCopyAssignmentWithConstParam() const {
927
701k
    return data().HasDeclaredCopyAssignmentWithConstParam ||
928
660k
           (needsImplicitCopyAssignment() &&
929
660k
            implicitCopyAssignmentHasConstParam());
930
701k
  }
931
932
  /// Determine whether this class has had a move assignment
933
  /// declared by the user.
934
5.85M
  bool hasUserDeclaredMoveAssignment() const {
935
5.85M
    return data().UserDeclaredSpecialMembers & SMF_MoveAssignment;
936
5.85M
  }
937
938
  /// Determine whether this class has a move assignment operator.
939
1.42M
  bool hasMoveAssignment() const {
940
1.42M
    return (data().DeclaredSpecialMembers & SMF_MoveAssignment) ||
941
1.39M
           needsImplicitMoveAssignment();
942
1.42M
  }
943
944
  /// Set that we attempted to declare an implicit move assignment
945
  /// operator, but overload resolution failed so we deleted it.
946
2.87k
  void setImplicitMoveAssignmentIsDeleted() {
947
2.87k
    assert((data().DefaultedMoveAssignmentIsDeleted ||
948
2.87k
            needsOverloadResolutionForMoveAssignment()) &&
949
2.87k
           "move assignment should not be deleted");
950
2.87k
    data().DefaultedMoveAssignmentIsDeleted = true;
951
2.87k
  }
952
953
  /// Determine whether this class should get an implicit move
954
  /// assignment operator or if any existing special member function inhibits
955
  /// this.
956
2.68M
  bool needsImplicitMoveAssignment() const {
957
2.68M
    return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) &&
958
2.64M
           !hasUserDeclaredCopyConstructor() &&
959
2.57M
           !hasUserDeclaredCopyAssignment() &&
960
2.57M
           !hasUserDeclaredMoveConstructor() &&
961
2.57M
           !hasUserDeclaredDestructor() &&
962
2.51M
           (!isLambda() || 
lambdaIsDefaultConstructibleAndAssignable()12.3k
);
963
2.68M
  }
964
965
  /// Determine whether we need to eagerly declare a move assignment
966
  /// operator for this class.
967
1.00M
  bool needsOverloadResolutionForMoveAssignment() const {
968
1.00M
    return data().NeedOverloadResolutionForMoveAssignment;
969
1.00M
  }
970
971
  /// Determine whether this class has a user-declared destructor.
972
  ///
973
  /// When false, a destructor will be implicitly declared.
974
8.27M
  bool hasUserDeclaredDestructor() const {
975
8.27M
    return data().UserDeclaredSpecialMembers & SMF_Destructor;
976
8.27M
  }
977
978
  /// Determine whether this class needs an implicit destructor to
979
  /// be lazily declared.
980
2.33M
  bool needsImplicitDestructor() const {
981
2.33M
    return !(data().DeclaredSpecialMembers & SMF_Destructor);
982
2.33M
  }
983
984
  /// Determine whether we need to eagerly declare a destructor for this
985
  /// class.
986
1.96M
  bool needsOverloadResolutionForDestructor() const {
987
1.96M
    return data().NeedOverloadResolutionForDestructor;
988
1.96M
  }
989
990
  /// Determine whether this class describes a lambda function object.
991
77.4M
  bool isLambda() const {
992
    // An update record can't turn a non-lambda into a lambda.
993
77.4M
    auto *DD = DefinitionData;
994
77.4M
    return DD && 
DD->IsLambda72.5M
;
995
77.4M
  }
996
997
  /// Determine whether this class describes a generic
998
  /// lambda function object (i.e. function call operator is
999
  /// a template).
1000
  bool isGenericLambda() const;
1001
1002
  /// Determine whether this lambda should have an implicit default constructor
1003
  /// and copy and move assignment operators.
1004
  bool lambdaIsDefaultConstructibleAndAssignable() const;
1005
1006
  /// Retrieve the lambda call operator of the closure type
1007
  /// if this is a closure type.
1008
  CXXMethodDecl *getLambdaCallOperator() const;
1009
1010
  /// Retrieve the dependent lambda call operator of the closure type
1011
  /// if this is a templated closure type.
1012
  FunctionTemplateDecl *getDependentLambdaCallOperator() const;
1013
1014
  /// Retrieve the lambda static invoker, the address of which
1015
  /// is returned by the conversion operator, and the body of which
1016
  /// is forwarded to the lambda call operator. The version that does not
1017
  /// take a calling convention uses the 'default' calling convention for free
1018
  /// functions if the Lambda's calling convention was not modified via
1019
  /// attribute. Otherwise, it will return the calling convention specified for
1020
  /// the lambda.
1021
  CXXMethodDecl *getLambdaStaticInvoker() const;
1022
  CXXMethodDecl *getLambdaStaticInvoker(CallingConv CC) const;
1023
1024
  /// Retrieve the generic lambda's template parameter list.
1025
  /// Returns null if the class does not represent a lambda or a generic
1026
  /// lambda.
1027
  TemplateParameterList *getGenericLambdaTemplateParameterList() const;
1028
1029
  /// Retrieve the lambda template parameters that were specified explicitly.
1030
  ArrayRef<NamedDecl *> getLambdaExplicitTemplateParameters() const;
1031
1032
65.2k
  LambdaCaptureDefault getLambdaCaptureDefault() const {
1033
65.2k
    assert(isLambda());
1034
65.2k
    return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault);
1035
65.2k
  }
1036
1037
  /// Set the captures for this lambda closure type.
1038
  void setCaptures(ASTContext &Context, ArrayRef<LambdaCapture> Captures);
1039
1040
  /// For a closure type, retrieve the mapping from captured
1041
  /// variables and \c this to the non-static data members that store the
1042
  /// values or references of the captures.
1043
  ///
1044
  /// \param Captures Will be populated with the mapping from captured
1045
  /// variables to the corresponding fields.
1046
  ///
1047
  /// \param ThisCapture Will be set to the field declaration for the
1048
  /// \c this capture.
1049
  ///
1050
  /// \note No entries will be added for init-captures, as they do not capture
1051
  /// variables.
1052
  void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1053
                        FieldDecl *&ThisCapture) const;
1054
1055
  using capture_const_iterator = const LambdaCapture *;
1056
  using capture_const_range = llvm::iterator_range<capture_const_iterator>;
1057
1058
2.87k
  capture_const_range captures() const {
1059
2.87k
    return capture_const_range(captures_begin(), captures_end());
1060
2.87k
  }
1061
1062
6.78k
  capture_const_iterator captures_begin() const {
1063
6.78k
    return isLambda() ? getLambdaData().Captures : 
nullptr0
;
1064
6.78k
  }
1065
1066
2.98k
  capture_const_iterator captures_end() const {
1067
2.98k
    return isLambda() ? captures_begin() + getLambdaData().NumCaptures
1068
0
                      : nullptr;
1069
2.98k
  }
1070
1071
45.9k
  unsigned capture_size() const { return getLambdaData().NumCaptures; }
1072
1073
  using conversion_iterator = UnresolvedSetIterator;
1074
1075
3.48M
  conversion_iterator conversion_begin() const {
1076
3.48M
    return data().Conversions.get(getASTContext()).begin();
1077
3.48M
  }
1078
1079
3.48M
  conversion_iterator conversion_end() const {
1080
3.48M
    return data().Conversions.get(getASTContext()).end();
1081
3.48M
  }
1082
1083
  /// Removes a conversion function from this class.  The conversion
1084
  /// function must currently be a member of this class.  Furthermore,
1085
  /// this class must currently be in the process of being defined.
1086
  void removeConversion(const NamedDecl *Old);
1087
1088
  /// Get all conversion functions visible in current class,
1089
  /// including conversion function templates.
1090
  llvm::iterator_range<conversion_iterator>
1091
  getVisibleConversionFunctions() const;
1092
1093
  /// Determine whether this class is an aggregate (C++ [dcl.init.aggr]),
1094
  /// which is a class with no user-declared constructors, no private
1095
  /// or protected non-static data members, no base classes, and no virtual
1096
  /// functions (C++ [dcl.init.aggr]p1).
1097
1.84M
  bool isAggregate() const { return data().Aggregate; }
1098
1099
  /// Whether this class has any in-class initializers
1100
  /// for non-static data members (including those in anonymous unions or
1101
  /// structs).
1102
18.2k
  bool hasInClassInitializer() const { return data().HasInClassInitializer; }
1103
1104
  /// Whether this class or any of its subobjects has any members of
1105
  /// reference type which would make value-initialization ill-formed.
1106
  ///
1107
  /// Per C++03 [dcl.init]p5:
1108
  ///  - if T is a non-union class type without a user-declared constructor,
1109
  ///    then every non-static data member and base-class component of T is
1110
  ///    value-initialized [...] A program that calls for [...]
1111
  ///    value-initialization of an entity of reference type is ill-formed.
1112
701k
  bool hasUninitializedReferenceMember() const {
1113
701k
    return !isUnion() && 
!hasUserDeclaredConstructor()691k
&&
1114
627k
           data().HasUninitializedReferenceMember;
1115
701k
  }
1116
1117
  /// Whether this class is a POD-type (C++ [class]p4)
1118
  ///
1119
  /// For purposes of this function a class is POD if it is an aggregate
1120
  /// that has no non-static non-POD data members, no reference data
1121
  /// members, no user-defined copy assignment operator and no
1122
  /// user-defined destructor.
1123
  ///
1124
  /// Note that this is the C++ TR1 definition of POD.
1125
611k
  bool isPOD() const { return data().PlainOldData; }
1126
1127
  /// True if this class is C-like, without C++-specific features, e.g.
1128
  /// it contains only public fields, no bases, tag kind is not 'class', etc.
1129
  bool isCLike() const;
1130
1131
  /// Determine whether this is an empty class in the sense of
1132
  /// (C++11 [meta.unary.prop]).
1133
  ///
1134
  /// The CXXRecordDecl is a class type, but not a union type,
1135
  /// with no non-static data members other than bit-fields of length 0,
1136
  /// no virtual member functions, no virtual base classes,
1137
  /// and no base class B for which is_empty<B>::value is false.
1138
  ///
1139
  /// \note This does NOT include a check for union-ness.
1140
2.88M
  bool isEmpty() const { return data().Empty; }
1141
1142
99
  bool hasPrivateFields() const {
1143
99
    return data().HasPrivateFields;
1144
99
  }
1145
1146
99
  bool hasProtectedFields() const {
1147
99
    return data().HasProtectedFields;
1148
99
  }
1149
1150
  /// Determine whether this class has direct non-static data members.
1151
370k
  bool hasDirectFields() const {
1152
370k
    auto &D = data();
1153
370k
    return D.HasPublicFields || 
D.HasProtectedFields366k
||
D.HasPrivateFields363k
;
1154
370k
  }
1155
1156
  /// Whether this class is polymorphic (C++ [class.virtual]),
1157
  /// which means that the class contains or inherits a virtual function.
1158
1.93M
  bool isPolymorphic() const { return data().Polymorphic; }
1159
1160
  /// Determine whether this class has a pure virtual function.
1161
  ///
1162
  /// The class is is abstract per (C++ [class.abstract]p2) if it declares
1163
  /// a pure virtual function or inherits a pure virtual function that is
1164
  /// not overridden.
1165
4.94M
  bool isAbstract() const { return data().Abstract; }
1166
1167
  /// Determine whether this class is standard-layout per
1168
  /// C++ [class]p7.
1169
731k
  bool isStandardLayout() const { return data().IsStandardLayout; }
1170
1171
  /// Determine whether this class was standard-layout per
1172
  /// C++11 [class]p7, specifically using the C++11 rules without any DRs.
1173
700k
  bool isCXX11StandardLayout() const { return data().IsCXX11StandardLayout; }
1174
1175
  /// Determine whether this class, or any of its class subobjects,
1176
  /// contains a mutable field.
1177
737k
  bool hasMutableFields() const { return data().HasMutableFields; }
1178
1179
  /// Determine whether this class has any variant members.
1180
333k
  bool hasVariantMembers() const { return data().HasVariantMembers; }
1181
1182
  /// Determine whether this class has a trivial default constructor
1183
  /// (C++11 [class.ctor]p5).
1184
960k
  bool hasTrivialDefaultConstructor() const {
1185
960k
    return hasDefaultConstructor() &&
1186
929k
           (data().HasTrivialSpecialMembers & SMF_DefaultConstructor);
1187
960k
  }
1188
1189
  /// Determine whether this class has a non-trivial default constructor
1190
  /// (C++11 [class.ctor]p5).
1191
1.71k
  bool hasNonTrivialDefaultConstructor() const {
1192
1.71k
    return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) ||
1193
1.53k
           (needsImplicitDefaultConstructor() &&
1194
987
            !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor));
1195
1.71k
  }
1196
1197
  /// Determine whether this class has at least one constexpr constructor
1198
  /// other than the copy or move constructors.
1199
112k
  bool hasConstexprNonCopyMoveConstructor() const {
1200
112k
    return data().HasConstexprNonCopyMoveConstructor ||
1201
72.7k
           (needsImplicitDefaultConstructor() &&
1202
42.2k
            defaultedDefaultConstructorIsConstexpr());
1203
112k
  }
1204
1205
  /// Determine whether a defaulted default constructor for this class
1206
  /// would be constexpr.
1207
601k
  bool defaultedDefaultConstructorIsConstexpr() const {
1208
601k
    return data().DefaultedDefaultConstructorIsConstexpr &&
1209
292k
           (!isUnion() || 
hasInClassInitializer()12.6k
||
!hasVariantMembers()12.4k
||
1210
12.3k
            getLangOpts().CPlusPlus20);
1211
601k
  }
1212
1213
  /// Determine whether this class has a constexpr default constructor.
1214
698k
  bool hasConstexprDefaultConstructor() const {
1215
698k
    return data().HasConstexprDefaultConstructor ||
1216
548k
           (needsImplicitDefaultConstructor() &&
1217
494k
            defaultedDefaultConstructorIsConstexpr());
1218
698k
  }
1219
1220
  /// Determine whether this class has a trivial copy constructor
1221
  /// (C++ [class.copy]p6, C++11 [class.copy]p12)
1222
1.07M
  bool hasTrivialCopyConstructor() const {
1223
1.07M
    return data().HasTrivialSpecialMembers & SMF_CopyConstructor;
1224
1.07M
  }
1225
1226
1.77M
  bool hasTrivialCopyConstructorForCall() const {
1227
1.77M
    return data().HasTrivialSpecialMembersForCall & SMF_CopyConstructor;
1228
1.77M
  }
1229
1230
  /// Determine whether this class has a non-trivial copy constructor
1231
  /// (C++ [class.copy]p6, C++11 [class.copy]p12)
1232
279k
  bool hasNonTrivialCopyConstructor() const {
1233
279k
    return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor ||
1234
226k
           !hasTrivialCopyConstructor();
1235
279k
  }
1236
1237
321
  bool hasNonTrivialCopyConstructorForCall() const {
1238
321
    return (data().DeclaredNonTrivialSpecialMembersForCall &
1239
321
            SMF_CopyConstructor) ||
1240
307
           !hasTrivialCopyConstructorForCall();
1241
321
  }
1242
1243
  /// Determine whether this class has a trivial move constructor
1244
  /// (C++11 [class.copy]p12)
1245
781k
  bool hasTrivialMoveConstructor() const {
1246
781k
    return hasMoveConstructor() &&
1247
756k
           (data().HasTrivialSpecialMembers & SMF_MoveConstructor);
1248
781k
  }
1249
1250
1.72M
  bool hasTrivialMoveConstructorForCall() const {
1251
1.72M
    return hasMoveConstructor() &&
1252
1.69M
           (data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor);
1253
1.72M
  }
1254
1255
  /// Determine whether this class has a non-trivial move constructor
1256
  /// (C++11 [class.copy]p12)
1257
194k
  bool hasNonTrivialMoveConstructor() const {
1258
194k
    return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) ||
1259
188k
           (needsImplicitMoveConstructor() &&
1260
122k
            !(data().HasTrivialSpecialMembers & SMF_MoveConstructor));
1261
194k
  }
1262
1263
0
  bool hasNonTrivialMoveConstructorForCall() const {
1264
0
    return (data().DeclaredNonTrivialSpecialMembersForCall &
1265
0
            SMF_MoveConstructor) ||
1266
0
           (needsImplicitMoveConstructor() &&
1267
0
            !(data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor));
1268
0
  }
1269
1270
  /// Determine whether this class has a trivial copy assignment operator
1271
  /// (C++ [class.copy]p11, C++11 [class.copy]p25)
1272
968k
  bool hasTrivialCopyAssignment() const {
1273
968k
    return data().HasTrivialSpecialMembers & SMF_CopyAssignment;
1274
968k
  }
1275
1276
  /// Determine whether this class has a non-trivial copy assignment
1277
  /// operator (C++ [class.copy]p11, C++11 [class.copy]p25)
1278
220k
  bool hasNonTrivialCopyAssignment() const {
1279
220k
    return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment ||
1280
217k
           !hasTrivialCopyAssignment();
1281
220k
  }
1282
1283
  /// Determine whether this class has a trivial move assignment operator
1284
  /// (C++11 [class.copy]p25)
1285
719k
  bool hasTrivialMoveAssignment() const {
1286
719k
    return hasMoveAssignment() &&
1287
693k
           (data().HasTrivialSpecialMembers & SMF_MoveAssignment);
1288
719k
  }
1289
1290
  /// Determine whether this class has a non-trivial move assignment
1291
  /// operator (C++11 [class.copy]p25)
1292
185k
  bool hasNonTrivialMoveAssignment() const {
1293
185k
    return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) ||
1294
184k
           (needsImplicitMoveAssignment() &&
1295
160k
            !(data().HasTrivialSpecialMembers & SMF_MoveAssignment));
1296
185k
  }
1297
1298
  /// Determine whether a defaulted default constructor for this class
1299
  /// would be constexpr.
1300
608k
  bool defaultedDestructorIsConstexpr() const {
1301
608k
    return data().DefaultedDestructorIsConstexpr &&
1302
497k
           getLangOpts().CPlusPlus20;
1303
608k
  }
1304
1305
  /// Determine whether this class has a constexpr destructor.
1306
  bool hasConstexprDestructor() const;
1307
1308
  /// Determine whether this class has a trivial destructor
1309
  /// (C++ [class.dtor]p3)
1310
2.18M
  bool hasTrivialDestructor() const {
1311
2.18M
    return data().HasTrivialSpecialMembers & SMF_Destructor;
1312
2.18M
  }
1313
1314
1.75M
  bool hasTrivialDestructorForCall() const {
1315
1.75M
    return data().HasTrivialSpecialMembersForCall & SMF_Destructor;
1316
1.75M
  }
1317
1318
  /// Determine whether this class has a non-trivial destructor
1319
  /// (C++ [class.dtor]p3)
1320
1.43M
  bool hasNonTrivialDestructor() const {
1321
1.43M
    return !(data().HasTrivialSpecialMembers & SMF_Destructor);
1322
1.43M
  }
1323
1324
333
  bool hasNonTrivialDestructorForCall() const {
1325
333
    return !(data().HasTrivialSpecialMembersForCall & SMF_Destructor);
1326
333
  }
1327
1328
7.34k
  void setHasTrivialSpecialMemberForCall() {
1329
7.34k
    data().HasTrivialSpecialMembersForCall =
1330
7.34k
        (SMF_CopyConstructor | SMF_MoveConstructor | SMF_Destructor);
1331
7.34k
  }
1332
1333
  /// Determine whether declaring a const variable with this type is ok
1334
  /// per core issue 253.
1335
703k
  bool allowConstDefaultInit() const {
1336
703k
    return !data().HasUninitializedFields ||
1337
320k
           !(data().HasDefaultedDefaultConstructor ||
1338
312k
             needsImplicitDefaultConstructor());
1339
703k
  }
1340
1341
  /// Determine whether this class has a destructor which has no
1342
  /// semantic effect.
1343
  ///
1344
  /// Any such destructor will be trivial, public, defaulted and not deleted,
1345
  /// and will call only irrelevant destructors.
1346
956k
  bool hasIrrelevantDestructor() const {
1347
956k
    return data().HasIrrelevantDestructor;
1348
956k
  }
1349
1350
  /// Determine whether this class has a non-literal or/ volatile type
1351
  /// non-static data member or base class.
1352
1.12M
  bool hasNonLiteralTypeFieldsOrBases() const {
1353
1.12M
    return data().HasNonLiteralTypeFieldsOrBases;
1354
1.12M
  }
1355
1356
  /// Determine whether this class has a using-declaration that names
1357
  /// a user-declared base class constructor.
1358
2.90M
  bool hasInheritedConstructor() const {
1359
2.90M
    return data().HasInheritedConstructor;
1360
2.90M
  }
1361
1362
  /// Determine whether this class has a using-declaration that names
1363
  /// a base class assignment operator.
1364
1.94M
  bool hasInheritedAssignment() const {
1365
1.94M
    return data().HasInheritedAssignment;
1366
1.94M
  }
1367
1368
  /// Determine whether this class is considered trivially copyable per
1369
  /// (C++11 [class]p6).
1370
  bool isTriviallyCopyable() const;
1371
1372
  /// Determine whether this class is considered trivial.
1373
  ///
1374
  /// C++11 [class]p6:
1375
  ///    "A trivial class is a class that has a trivial default constructor and
1376
  ///    is trivially copyable."
1377
176k
  bool isTrivial() const {
1378
176k
    return isTriviallyCopyable() && 
hasTrivialDefaultConstructor()133k
;
1379
176k
  }
1380
1381
  /// Determine whether this class is a literal type.
1382
  ///
1383
  /// C++11 [basic.types]p10:
1384
  ///   A class type that has all the following properties:
1385
  ///     - it has a trivial destructor
1386
  ///     - every constructor call and full-expression in the
1387
  ///       brace-or-equal-intializers for non-static data members (if any) is
1388
  ///       a constant expression.
1389
  ///     - it is an aggregate type or has at least one constexpr constructor
1390
  ///       or constructor template that is not a copy or move constructor, and
1391
  ///     - all of its non-static data members and base classes are of literal
1392
  ///       types
1393
  ///
1394
  /// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by
1395
  /// treating types with trivial default constructors as literal types.
1396
  ///
1397
  /// Only in C++17 and beyond, are lambdas literal types.
1398
781k
  bool isLiteral() const {
1399
781k
    const LangOptions &LangOpts = getLangOpts();
1400
781k
    return (LangOpts.CPlusPlus20 ? 
hasConstexprDestructor()10.4k
1401
771k
                                          : hasTrivialDestructor()) &&
1402
741k
           (!isLambda() || 
LangOpts.CPlusPlus171.52k
) &&
1403
741k
           !hasNonLiteralTypeFieldsOrBases() &&
1404
731k
           (isAggregate() || 
isLambda()112k
||
1405
111k
            hasConstexprNonCopyMoveConstructor() ||
1406
32.9k
            hasTrivialDefaultConstructor());
1407
781k
  }
1408
1409
  /// Determine whether this is a structural type.
1410
241
  bool isStructural() const {
1411
241
    return isLiteral() && 
data().StructuralIfLiteral234
;
1412
241
  }
1413
1414
  /// If this record is an instantiation of a member class,
1415
  /// retrieves the member class from which it was instantiated.
1416
  ///
1417
  /// This routine will return non-null for (non-templated) member
1418
  /// classes of class templates. For example, given:
1419
  ///
1420
  /// \code
1421
  /// template<typename T>
1422
  /// struct X {
1423
  ///   struct A { };
1424
  /// };
1425
  /// \endcode
1426
  ///
1427
  /// The declaration for X<int>::A is a (non-templated) CXXRecordDecl
1428
  /// whose parent is the class template specialization X<int>. For
1429
  /// this declaration, getInstantiatedFromMemberClass() will return
1430
  /// the CXXRecordDecl X<T>::A. When a complete definition of
1431
  /// X<int>::A is required, it will be instantiated from the
1432
  /// declaration returned by getInstantiatedFromMemberClass().
1433
  CXXRecordDecl *getInstantiatedFromMemberClass() const;
1434
1435
  /// If this class is an instantiation of a member class of a
1436
  /// class template specialization, retrieves the member specialization
1437
  /// information.
1438
  MemberSpecializationInfo *getMemberSpecializationInfo() const;
1439
1440
  /// Specify that this record is an instantiation of the
1441
  /// member class \p RD.
1442
  void setInstantiationOfMemberClass(CXXRecordDecl *RD,
1443
                                     TemplateSpecializationKind TSK);
1444
1445
  /// Retrieves the class template that is described by this
1446
  /// class declaration.
1447
  ///
1448
  /// Every class template is represented as a ClassTemplateDecl and a
1449
  /// CXXRecordDecl. The former contains template properties (such as
1450
  /// the template parameter lists) while the latter contains the
1451
  /// actual description of the template's
1452
  /// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the
1453
  /// CXXRecordDecl that from a ClassTemplateDecl, while
1454
  /// getDescribedClassTemplate() retrieves the ClassTemplateDecl from
1455
  /// a CXXRecordDecl.
1456
  ClassTemplateDecl *getDescribedClassTemplate() const;
1457
1458
  void setDescribedClassTemplate(ClassTemplateDecl *Template);
1459
1460
  /// Determine whether this particular class is a specialization or
1461
  /// instantiation of a class template or member class of a class template,
1462
  /// and how it was instantiated or specialized.
1463
  TemplateSpecializationKind getTemplateSpecializationKind() const;
1464
1465
  /// Set the kind of specialization or template instantiation this is.
1466
  void setTemplateSpecializationKind(TemplateSpecializationKind TSK);
1467
1468
  /// Retrieve the record declaration from which this record could be
1469
  /// instantiated. Returns null if this class is not a template instantiation.
1470
  const CXXRecordDecl *getTemplateInstantiationPattern() const;
1471
1472
1.27M
  CXXRecordDecl *getTemplateInstantiationPattern() {
1473
1.27M
    return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this)
1474
1.27M
                                           ->getTemplateInstantiationPattern());
1475
1.27M
  }
1476
1477
  /// Returns the destructor decl for this class.
1478
  CXXDestructorDecl *getDestructor() const;
1479
1480
  /// Returns true if the class destructor, or any implicitly invoked
1481
  /// destructors are marked noreturn.
1482
  bool isAnyDestructorNoReturn() const;
1483
1484
  /// If the class is a local class [class.local], returns
1485
  /// the enclosing function declaration.
1486
5.13M
  const FunctionDecl *isLocalClass() const {
1487
5.13M
    if (const auto *RD = dyn_cast<CXXRecordDecl>(getDeclContext()))
1488
928k
      return RD->isLocalClass();
1489
1490
4.21M
    return dyn_cast<FunctionDecl>(getDeclContext());
1491
4.21M
  }
1492
1493
1.27M
  FunctionDecl *isLocalClass() {
1494
1.27M
    return const_cast<FunctionDecl*>(
1495
1.27M
        const_cast<const CXXRecordDecl*>(this)->isLocalClass());
1496
1.27M
  }
1497
1498
  /// Determine whether this dependent class is a current instantiation,
1499
  /// when viewed from within the given context.
1500
  bool isCurrentInstantiation(const DeclContext *CurContext) const;
1501
1502
  /// Determine whether this class is derived from the class \p Base.
1503
  ///
1504
  /// This routine only determines whether this class is derived from \p Base,
1505
  /// but does not account for factors that may make a Derived -> Base class
1506
  /// ill-formed, such as private/protected inheritance or multiple, ambiguous
1507
  /// base class subobjects.
1508
  ///
1509
  /// \param Base the base class we are searching for.
1510
  ///
1511
  /// \returns true if this class is derived from Base, false otherwise.
1512
  bool isDerivedFrom(const CXXRecordDecl *Base) const;
1513
1514
  /// Determine whether this class is derived from the type \p Base.
1515
  ///
1516
  /// This routine only determines whether this class is derived from \p Base,
1517
  /// but does not account for factors that may make a Derived -> Base class
1518
  /// ill-formed, such as private/protected inheritance or multiple, ambiguous
1519
  /// base class subobjects.
1520
  ///
1521
  /// \param Base the base class we are searching for.
1522
  ///
1523
  /// \param Paths will contain the paths taken from the current class to the
1524
  /// given \p Base class.
1525
  ///
1526
  /// \returns true if this class is derived from \p Base, false otherwise.
1527
  ///
1528
  /// \todo add a separate parameter to configure IsDerivedFrom, rather than
1529
  /// tangling input and output in \p Paths
1530
  bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const;
1531
1532
  /// Determine whether this class is virtually derived from
1533
  /// the class \p Base.
1534
  ///
1535
  /// This routine only determines whether this class is virtually
1536
  /// derived from \p Base, but does not account for factors that may
1537
  /// make a Derived -> Base class ill-formed, such as
1538
  /// private/protected inheritance or multiple, ambiguous base class
1539
  /// subobjects.
1540
  ///
1541
  /// \param Base the base class we are searching for.
1542
  ///
1543
  /// \returns true if this class is virtually derived from Base,
1544
  /// false otherwise.
1545
  bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const;
1546
1547
  /// Determine whether this class is provably not derived from
1548
  /// the type \p Base.
1549
  bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const;
1550
1551
  /// Function type used by forallBases() as a callback.
1552
  ///
1553
  /// \param BaseDefinition the definition of the base class
1554
  ///
1555
  /// \returns true if this base matched the search criteria
1556
  using ForallBasesCallback =
1557
      llvm::function_ref<bool(const CXXRecordDecl *BaseDefinition)>;
1558
1559
  /// Determines if the given callback holds for all the direct
1560
  /// or indirect base classes of this type.
1561
  ///
1562
  /// The class itself does not count as a base class.  This routine
1563
  /// returns false if the class has non-computable base classes.
1564
  ///
1565
  /// \param BaseMatches Callback invoked for each (direct or indirect) base
1566
  /// class of this type until a call returns false.
1567
  bool forallBases(ForallBasesCallback BaseMatches) const;
1568
1569
  /// Function type used by lookupInBases() to determine whether a
1570
  /// specific base class subobject matches the lookup criteria.
1571
  ///
1572
  /// \param Specifier the base-class specifier that describes the inheritance
1573
  /// from the base class we are trying to match.
1574
  ///
1575
  /// \param Path the current path, from the most-derived class down to the
1576
  /// base named by the \p Specifier.
1577
  ///
1578
  /// \returns true if this base matched the search criteria, false otherwise.
1579
  using BaseMatchesCallback =
1580
      llvm::function_ref<bool(const CXXBaseSpecifier *Specifier,
1581
                              CXXBasePath &Path)>;
1582
1583
  /// Look for entities within the base classes of this C++ class,
1584
  /// transitively searching all base class subobjects.
1585
  ///
1586
  /// This routine uses the callback function \p BaseMatches to find base
1587
  /// classes meeting some search criteria, walking all base class subobjects
1588
  /// and populating the given \p Paths structure with the paths through the
1589
  /// inheritance hierarchy that resulted in a match. On a successful search,
1590
  /// the \p Paths structure can be queried to retrieve the matching paths and
1591
  /// to determine if there were any ambiguities.
1592
  ///
1593
  /// \param BaseMatches callback function used to determine whether a given
1594
  /// base matches the user-defined search criteria.
1595
  ///
1596
  /// \param Paths used to record the paths from this class to its base class
1597
  /// subobjects that match the search criteria.
1598
  ///
1599
  /// \param LookupInDependent can be set to true to extend the search to
1600
  /// dependent base classes.
1601
  ///
1602
  /// \returns true if there exists any path from this class to a base class
1603
  /// subobject that matches the search criteria.
1604
  bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths,
1605
                     bool LookupInDependent = false) const;
1606
1607
  /// Base-class lookup callback that determines whether the given
1608
  /// base class specifier refers to a specific class declaration.
1609
  ///
1610
  /// This callback can be used with \c lookupInBases() to determine whether
1611
  /// a given derived class has is a base class subobject of a particular type.
1612
  /// The base record pointer should refer to the canonical CXXRecordDecl of the
1613
  /// base class that we are searching for.
1614
  static bool FindBaseClass(const CXXBaseSpecifier *Specifier,
1615
                            CXXBasePath &Path, const CXXRecordDecl *BaseRecord);
1616
1617
  /// Base-class lookup callback that determines whether the
1618
  /// given base class specifier refers to a specific class
1619
  /// declaration and describes virtual derivation.
1620
  ///
1621
  /// This callback can be used with \c lookupInBases() to determine
1622
  /// whether a given derived class has is a virtual base class
1623
  /// subobject of a particular type.  The base record pointer should
1624
  /// refer to the canonical CXXRecordDecl of the base class that we
1625
  /// are searching for.
1626
  static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier,
1627
                                   CXXBasePath &Path,
1628
                                   const CXXRecordDecl *BaseRecord);
1629
1630
  /// Retrieve the final overriders for each virtual member
1631
  /// function in the class hierarchy where this class is the
1632
  /// most-derived class in the class hierarchy.
1633
  void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const;
1634
1635
  /// Get the indirect primary bases for this class.
1636
  void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const;
1637
1638
  /// Determine whether this class has a member with the given name, possibly
1639
  /// in a non-dependent base class.
1640
  ///
1641
  /// No check for ambiguity is performed, so this should never be used when
1642
  /// implementing language semantics, but it may be appropriate for warnings,
1643
  /// static analysis, or similar.
1644
  bool hasMemberName(DeclarationName N) const;
1645
1646
  /// Performs an imprecise lookup of a dependent name in this class.
1647
  ///
1648
  /// This function does not follow strict semantic rules and should be used
1649
  /// only when lookup rules can be relaxed, e.g. indexing.
1650
  std::vector<const NamedDecl *>
1651
  lookupDependentName(DeclarationName Name,
1652
                      llvm::function_ref<bool(const NamedDecl *ND)> Filter);
1653
1654
  /// Renders and displays an inheritance diagram
1655
  /// for this C++ class and all of its base classes (transitively) using
1656
  /// GraphViz.
1657
  void viewInheritance(ASTContext& Context) const;
1658
1659
  /// Calculates the access of a decl that is reached
1660
  /// along a path.
1661
  static AccessSpecifier MergeAccess(AccessSpecifier PathAccess,
1662
931k
                                     AccessSpecifier DeclAccess) {
1663
931k
    assert(DeclAccess != AS_none);
1664
931k
    if (DeclAccess == AS_private) 
return AS_none29.9k
;
1665
901k
    return (PathAccess > DeclAccess ? 
PathAccess70.8k
:
DeclAccess830k
);
1666
901k
  }
1667
1668
  /// Indicates that the declaration of a defaulted or deleted special
1669
  /// member function is now complete.
1670
  void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD);
1671
1672
  void setTrivialForCallFlags(CXXMethodDecl *MD);
1673
1674
  /// Indicates that the definition of this class is now complete.
1675
  void completeDefinition() override;
1676
1677
  /// Indicates that the definition of this class is now complete,
1678
  /// and provides a final overrider map to help determine
1679
  ///
1680
  /// \param FinalOverriders The final overrider map for this class, which can
1681
  /// be provided as an optimization for abstract-class checking. If NULL,
1682
  /// final overriders will be computed if they are needed to complete the
1683
  /// definition.
1684
  void completeDefinition(CXXFinalOverriderMap *FinalOverriders);
1685
1686
  /// Determine whether this class may end up being abstract, even though
1687
  /// it is not yet known to be abstract.
1688
  ///
1689
  /// \returns true if this class is not known to be abstract but has any
1690
  /// base classes that are abstract. In this case, \c completeDefinition()
1691
  /// will need to compute final overriders to determine whether the class is
1692
  /// actually abstract.
1693
  bool mayBeAbstract() const;
1694
1695
  /// Determine whether it's impossible for a class to be derived from this
1696
  /// class. This is best-effort, and may conservatively return false.
1697
  bool isEffectivelyFinal() const;
1698
1699
  /// If this is the closure type of a lambda expression, retrieve the
1700
  /// number to be used for name mangling in the Itanium C++ ABI.
1701
  ///
1702
  /// Zero indicates that this closure type has internal linkage, so the
1703
  /// mangling number does not matter, while a non-zero value indicates which
1704
  /// lambda expression this is in this particular context.
1705
35.3k
  unsigned getLambdaManglingNumber() const {
1706
35.3k
    assert(isLambda() && "Not a lambda closure type!");
1707
35.3k
    return getLambdaData().ManglingNumber;
1708
35.3k
  }
1709
1710
  /// The lambda is known to has internal linkage no matter whether it has name
1711
  /// mangling number.
1712
13.9k
  bool hasKnownLambdaInternalLinkage() const {
1713
13.9k
    assert(isLambda() && "Not a lambda closure type!");
1714
13.9k
    return getLambdaData().HasKnownInternalLinkage;
1715
13.9k
  }
1716
1717
  /// Retrieve the declaration that provides additional context for a
1718
  /// lambda, when the normal declaration context is not specific enough.
1719
  ///
1720
  /// Certain contexts (default arguments of in-class function parameters and
1721
  /// the initializers of data members) have separate name mangling rules for
1722
  /// lambdas within the Itanium C++ ABI. For these cases, this routine provides
1723
  /// the declaration in which the lambda occurs, e.g., the function parameter
1724
  /// or the non-static data member. Otherwise, it returns NULL to imply that
1725
  /// the declaration context suffices.
1726
  Decl *getLambdaContextDecl() const;
1727
1728
  /// Set the mangling number and context declaration for a lambda
1729
  /// class.
1730
  void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl,
1731
6.09k
                         bool HasKnownInternalLinkage = false) {
1732
6.09k
    assert(isLambda() && "Not a lambda closure type!");
1733
6.09k
    getLambdaData().ManglingNumber = ManglingNumber;
1734
6.09k
    getLambdaData().ContextDecl = ContextDecl;
1735
6.09k
    getLambdaData().HasKnownInternalLinkage = HasKnownInternalLinkage;
1736
6.09k
  }
1737
1738
  /// Returns the inheritance model used for this record.
1739
  MSInheritanceModel getMSInheritanceModel() const;
1740
1741
  /// Calculate what the inheritance model would be for this class.
1742
  MSInheritanceModel calculateInheritanceModel() const;
1743
1744
  /// In the Microsoft C++ ABI, use zero for the field offset of a null data
1745
  /// member pointer if we can guarantee that zero is not a valid field offset,
1746
  /// or if the member pointer has multiple fields.  Polymorphic classes have a
1747
  /// vfptr at offset zero, so we can use zero for null.  If there are multiple
1748
  /// fields, we can use zero even if it is a valid field offset because
1749
  /// null-ness testing will check the other fields.
1750
  bool nullFieldOffsetIsZero() const;
1751
1752
  /// Controls when vtordisps will be emitted if this record is used as a
1753
  /// virtual base.
1754
  MSVtorDispMode getMSVtorDispMode() const;
1755
1756
  /// Determine whether this lambda expression was known to be dependent
1757
  /// at the time it was created, even if its context does not appear to be
1758
  /// dependent.
1759
  ///
1760
  /// This flag is a workaround for an issue with parsing, where default
1761
  /// arguments are parsed before their enclosing function declarations have
1762
  /// been created. This means that any lambda expressions within those
1763
  /// default arguments will have as their DeclContext the context enclosing
1764
  /// the function declaration, which may be non-dependent even when the
1765
  /// function declaration itself is dependent. This flag indicates when we
1766
  /// know that the lambda is dependent despite that.
1767
40.6M
  bool isDependentLambda() const {
1768
40.6M
    return isLambda() && 
getLambdaData().Dependent333k
;
1769
40.6M
  }
1770
1771
10.0k
  TypeSourceInfo *getLambdaTypeInfo() const {
1772
10.0k
    return getLambdaData().MethodTyInfo;
1773
10.0k
  }
1774
1775
  // Determine whether this type is an Interface Like type for
1776
  // __interface inheritance purposes.
1777
  bool isInterfaceLike() const;
1778
1779
767M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1780
1.39G
  static bool classofKind(Kind K) {
1781
1.39G
    return K >= firstCXXRecord && 
K <= lastCXXRecord1.20G
;
1782
1.39G
  }
1783
};
1784
1785
/// Store information needed for an explicit specifier.
1786
/// Used by CXXDeductionGuideDecl, CXXConstructorDecl and CXXConversionDecl.
1787
class ExplicitSpecifier {
1788
  llvm::PointerIntPair<Expr *, 2, ExplicitSpecKind> ExplicitSpec{
1789
      nullptr, ExplicitSpecKind::ResolvedFalse};
1790
1791
public:
1792
95.6M
  ExplicitSpecifier() = default;
1793
  ExplicitSpecifier(Expr *Expression, ExplicitSpecKind Kind)
1794
2.88M
      : ExplicitSpec(Expression, Kind) {}
1795
393k
  ExplicitSpecKind getKind() const { return ExplicitSpec.getInt(); }
1796
4.99k
  const Expr *getExpr() const { return ExplicitSpec.getPointer(); }
1797
5.16M
  Expr *getExpr() { return ExplicitSpec.getPointer(); }
1798
1799
  /// Determine if the declaration had an explicit specifier of any kind.
1800
98.3M
  bool isSpecified() const {
1801
98.3M
    return ExplicitSpec.getInt() != ExplicitSpecKind::ResolvedFalse ||
1802
98.2M
           ExplicitSpec.getPointer();
1803
98.3M
  }
1804
1805
  /// Check for equivalence of explicit specifiers.
1806
  /// \return true if the explicit specifier are equivalent, false otherwise.
1807
  bool isEquivalent(const ExplicitSpecifier Other) const;
1808
  /// Determine whether this specifier is known to correspond to an explicit
1809
  /// declaration. Returns false if the specifier is absent or has an
1810
  /// expression that is value-dependent or evaluates to false.
1811
4.26M
  bool isExplicit() const {
1812
4.26M
    return ExplicitSpec.getInt() == ExplicitSpecKind::ResolvedTrue;
1813
4.26M
  }
1814
  /// Determine if the explicit specifier is invalid.
1815
  /// This state occurs after a substitution failures.
1816
969k
  bool isInvalid() const {
1817
969k
    return ExplicitSpec.getInt() == ExplicitSpecKind::Unresolved &&
1818
174
           !ExplicitSpec.getPointer();
1819
969k
  }
1820
288
  void setKind(ExplicitSpecKind Kind) { ExplicitSpec.setInt(Kind); }
1821
288
  void setExpr(Expr *E) { ExplicitSpec.setPointer(E); }
1822
  // Retrieve the explicit specifier in the given declaration, if any.
1823
  static ExplicitSpecifier getFromDecl(FunctionDecl *Function);
1824
42
  static const ExplicitSpecifier getFromDecl(const FunctionDecl *Function) {
1825
42
    return getFromDecl(const_cast<FunctionDecl *>(Function));
1826
42
  }
1827
142
  static ExplicitSpecifier Invalid() {
1828
142
    return ExplicitSpecifier(nullptr, ExplicitSpecKind::Unresolved);
1829
142
  }
1830
};
1831
1832
/// Represents a C++ deduction guide declaration.
1833
///
1834
/// \code
1835
/// template<typename T> struct A { A(); A(T); };
1836
/// A() -> A<int>;
1837
/// \endcode
1838
///
1839
/// In this example, there will be an explicit deduction guide from the
1840
/// second line, and implicit deduction guide templates synthesized from
1841
/// the constructors of \c A.
1842
class CXXDeductionGuideDecl : public FunctionDecl {
1843
  void anchor() override;
1844
1845
private:
1846
  CXXDeductionGuideDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
1847
                        ExplicitSpecifier ES,
1848
                        const DeclarationNameInfo &NameInfo, QualType T,
1849
                        TypeSourceInfo *TInfo, SourceLocation EndLocation)
1850
      : FunctionDecl(CXXDeductionGuide, C, DC, StartLoc, NameInfo, T, TInfo,
1851
                     SC_None, false, ConstexprSpecKind::Unspecified),
1852
2.25k
        ExplicitSpec(ES) {
1853
2.25k
    if (EndLocation.isValid())
1854
2.18k
      setRangeEnd(EndLocation);
1855
2.25k
    setIsCopyDeductionCandidate(false);
1856
2.25k
  }
1857
1858
  ExplicitSpecifier ExplicitSpec;
1859
69
  void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; }
1860
1861
public:
1862
  friend class ASTDeclReader;
1863
  friend class ASTDeclWriter;
1864
1865
  static CXXDeductionGuideDecl *
1866
  Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
1867
         ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T,
1868
         TypeSourceInfo *TInfo, SourceLocation EndLocation);
1869
1870
  static CXXDeductionGuideDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1871
1872
1.57k
  ExplicitSpecifier getExplicitSpecifier() { return ExplicitSpec; }
1873
0
  const ExplicitSpecifier getExplicitSpecifier() const { return ExplicitSpec; }
1874
1875
  /// Return true if the declartion is already resolved to be explicit.
1876
138
  bool isExplicit() const { return ExplicitSpec.isExplicit(); }
1877
1878
  /// Get the template for which this guide performs deduction.
1879
1.09k
  TemplateDecl *getDeducedTemplate() const {
1880
1.09k
    return getDeclName().getCXXDeductionGuideTemplate();
1881
1.09k
  }
1882
1883
2.62k
  void setIsCopyDeductionCandidate(bool isCDC = true) {
1884
2.62k
    FunctionDeclBits.IsCopyDeductionCandidate = isCDC;
1885
2.62k
  }
1886
1887
1.15k
  bool isCopyDeductionCandidate() const {
1888
1.15k
    return FunctionDeclBits.IsCopyDeductionCandidate;
1889
1.15k
  }
1890
1891
  // Implement isa/cast/dyncast/etc.
1892
7.78M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1893
7.78M
  static bool classofKind(Kind K) { return K == CXXDeductionGuide; }
1894
};
1895
1896
/// \brief Represents the body of a requires-expression.
1897
///
1898
/// This decl exists merely to serve as the DeclContext for the local
1899
/// parameters of the requires expression as well as other declarations inside
1900
/// it.
1901
///
1902
/// \code
1903
/// template<typename T> requires requires (T t) { {t++} -> regular; }
1904
/// \endcode
1905
///
1906
/// In this example, a RequiresExpr object will be generated for the expression,
1907
/// and a RequiresExprBodyDecl will be created to hold the parameter t and the
1908
/// template argument list imposed by the compound requirement.
1909
class RequiresExprBodyDecl : public Decl, public DeclContext {
1910
  RequiresExprBodyDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc)
1911
384
      : Decl(RequiresExprBody, DC, StartLoc), DeclContext(RequiresExprBody) {}
1912
1913
public:
1914
  friend class ASTDeclReader;
1915
  friend class ASTDeclWriter;
1916
1917
  static RequiresExprBodyDecl *Create(ASTContext &C, DeclContext *DC,
1918
                                      SourceLocation StartLoc);
1919
1920
  static RequiresExprBodyDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1921
1922
  // Implement isa/cast/dyncast/etc.
1923
4
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1924
112M
  static bool classofKind(Kind K) { return K == RequiresExprBody; }
1925
};
1926
1927
/// Represents a static or instance method of a struct/union/class.
1928
///
1929
/// In the terminology of the C++ Standard, these are the (static and
1930
/// non-static) member functions, whether virtual or not.
1931
class CXXMethodDecl : public FunctionDecl {
1932
  void anchor() override;
1933
1934
protected:
1935
  CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD,
1936
                SourceLocation StartLoc, const DeclarationNameInfo &NameInfo,
1937
                QualType T, TypeSourceInfo *TInfo, StorageClass SC,
1938
                bool isInline, ConstexprSpecKind ConstexprKind,
1939
                SourceLocation EndLocation,
1940
                Expr *TrailingRequiresClause = nullptr)
1941
      : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo, SC, isInline,
1942
3.40M
                     ConstexprKind, TrailingRequiresClause) {
1943
3.40M
    if (EndLocation.isValid())
1944
740k
      setRangeEnd(EndLocation);
1945
3.40M
  }
1946
1947
public:
1948
  static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD,
1949
                               SourceLocation StartLoc,
1950
                               const DeclarationNameInfo &NameInfo, QualType T,
1951
                               TypeSourceInfo *TInfo, StorageClass SC,
1952
                               bool isInline, ConstexprSpecKind ConstexprKind,
1953
                               SourceLocation EndLocation,
1954
                               Expr *TrailingRequiresClause = nullptr);
1955
1956
  static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1957
1958
  bool isStatic() const;
1959
9.05M
  bool isInstance() const { return !isStatic(); }
1960
1961
  /// Returns true if the given operator is implicitly static in a record
1962
  /// context.
1963
20.1M
  static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) {
1964
    // [class.free]p1:
1965
    // Any allocation function for a class T is a static member
1966
    // (even if not explicitly declared static).
1967
    // [class.free]p6 Any deallocation function for a class X is a static member
1968
    // (even if not explicitly declared static).
1969
20.1M
    return OOK == OO_New || 
OOK == OO_Array_New20.1M
||
OOK == OO_Delete20.1M
||
1970
20.1M
           OOK == OO_Array_Delete;
1971
20.1M
  }
1972
1973
666k
  bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); }
1974
607k
  bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); }
1975
1976
10.1M
  bool isVirtual() const {
1977
10.1M
    CXXMethodDecl *CD = const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();
1978
1979
    // Member function is virtual if it is marked explicitly so, or if it is
1980
    // declared in __interface -- then it is automatically pure virtual.
1981
10.1M
    if (CD->isVirtualAsWritten() || 
CD->isPure()9.58M
)
1982
543k
      return true;
1983
1984
9.58M
    return CD->size_overridden_methods() != 0;
1985
9.58M
  }
1986
1987
  /// If it's possible to devirtualize a call to this method, return the called
1988
  /// function. Otherwise, return null.
1989
1990
  /// \param Base The object on which this virtual function is called.
1991
  /// \param IsAppleKext True if we are compiling for Apple kext.
1992
  CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, bool IsAppleKext);
1993
1994
  const CXXMethodDecl *getDevirtualizedMethod(const Expr *Base,
1995
1.67k
                                              bool IsAppleKext) const {
1996
1.67k
    return const_cast<CXXMethodDecl *>(this)->getDevirtualizedMethod(
1997
1.67k
        Base, IsAppleKext);
1998
1.67k
  }
1999
2000
  /// Determine whether this is a usual deallocation function (C++
2001
  /// [basic.stc.dynamic.deallocation]p2), which is an overloaded delete or
2002
  /// delete[] operator with a particular signature. Populates \p PreventedBy
2003
  /// with the declarations of the functions of the same kind if they were the
2004
  /// reason for this function returning false. This is used by
2005
  /// Sema::isUsualDeallocationFunction to reconsider the answer based on the
2006
  /// context.
2007
  bool isUsualDeallocationFunction(
2008
      SmallVectorImpl<const FunctionDecl *> &PreventedBy) const;
2009
2010
  /// Determine whether this is a copy-assignment operator, regardless
2011
  /// of whether it was declared implicitly or explicitly.
2012
  bool isCopyAssignmentOperator() const;
2013
2014
  /// Determine whether this is a move assignment operator.
2015
  bool isMoveAssignmentOperator() const;
2016
2017
66.5M
  CXXMethodDecl *getCanonicalDecl() override {
2018
66.5M
    return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl());
2019
66.5M
  }
2020
33.4M
  const CXXMethodDecl *getCanonicalDecl() const {
2021
33.4M
    return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();
2022
33.4M
  }
2023
2024
164k
  CXXMethodDecl *getMostRecentDecl() {
2025
164k
    return cast<CXXMethodDecl>(
2026
164k
            static_cast<FunctionDecl *>(this)->getMostRecentDecl());
2027
164k
  }
2028
0
  const CXXMethodDecl *getMostRecentDecl() const {
2029
0
    return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl();
2030
0
  }
2031
2032
  void addOverriddenMethod(const CXXMethodDecl *MD);
2033
2034
  using method_iterator = const CXXMethodDecl *const *;
2035
2036
  method_iterator begin_overridden_methods() const;
2037
  method_iterator end_overridden_methods() const;
2038
  unsigned size_overridden_methods() const;
2039
2040
  using overridden_method_range = llvm::iterator_range<
2041
      llvm::TinyPtrVector<const CXXMethodDecl *>::const_iterator>;
2042
2043
  overridden_method_range overridden_methods() const;
2044
2045
  /// Return the parent of this method declaration, which
2046
  /// is the class in which this method is defined.
2047
28.8M
  const CXXRecordDecl *getParent() const {
2048
28.8M
    return cast<CXXRecordDecl>(FunctionDecl::getParent());
2049
28.8M
  }
2050
2051
  /// Return the parent of this method declaration, which
2052
  /// is the class in which this method is defined.
2053
9.73M
  CXXRecordDecl *getParent() {
2054
9.73M
    return const_cast<CXXRecordDecl *>(
2055
9.73M
             cast<CXXRecordDecl>(FunctionDecl::getParent()));
2056
9.73M
  }
2057
2058
  /// Return the type of the \c this pointer.
2059
  ///
2060
  /// Should only be called for instance (i.e., non-static) methods. Note
2061
  /// that for the call operator of a lambda closure type, this returns the
2062
  /// desugared 'this' type (a pointer to the closure type), not the captured
2063
  /// 'this' type.
2064
  QualType getThisType() const;
2065
2066
  /// Return the type of the object pointed by \c this.
2067
  ///
2068
  /// See getThisType() for usage restriction.
2069
  QualType getThisObjectType() const;
2070
2071
  static QualType getThisType(const FunctionProtoType *FPT,
2072
                              const CXXRecordDecl *Decl);
2073
2074
  static QualType getThisObjectType(const FunctionProtoType *FPT,
2075
                                    const CXXRecordDecl *Decl);
2076
2077
5.55M
  Qualifiers getMethodQualifiers() const {
2078
5.55M
    return getType()->castAs<FunctionProtoType>()->getMethodQuals();
2079
5.55M
  }
2080
2081
  /// Retrieve the ref-qualifier associated with this method.
2082
  ///
2083
  /// In the following example, \c f() has an lvalue ref-qualifier, \c g()
2084
  /// has an rvalue ref-qualifier, and \c h() has no ref-qualifier.
2085
  /// @code
2086
  /// struct X {
2087
  ///   void f() &;
2088
  ///   void g() &&;
2089
  ///   void h();
2090
  /// };
2091
  /// @endcode
2092
5.55M
  RefQualifierKind getRefQualifier() const {
2093
5.55M
    return getType()->castAs<FunctionProtoType>()->getRefQualifier();
2094
5.55M
  }
2095
2096
  bool hasInlineBody() const;
2097
2098
  /// Determine whether this is a lambda closure type's static member
2099
  /// function that is used for the result of the lambda's conversion to
2100
  /// function pointer (for a lambda with no captures).
2101
  ///
2102
  /// The function itself, if used, will have a placeholder body that will be
2103
  /// supplied by IR generation to either forward to the function call operator
2104
  /// or clone the function call operator.
2105
  bool isLambdaStaticInvoker() const;
2106
2107
  /// Find the method in \p RD that corresponds to this one.
2108
  ///
2109
  /// Find if \p RD or one of the classes it inherits from override this method.
2110
  /// If so, return it. \p RD is assumed to be a subclass of the class defining
2111
  /// this method (or be the class itself), unless \p MayBeBase is set to true.
2112
  CXXMethodDecl *
2113
  getCorrespondingMethodInClass(const CXXRecordDecl *RD,
2114
                                bool MayBeBase = false);
2115
2116
  const CXXMethodDecl *
2117
  getCorrespondingMethodInClass(const CXXRecordDecl *RD,
2118
705
                                bool MayBeBase = false) const {
2119
705
    return const_cast<CXXMethodDecl *>(this)
2120
705
              ->getCorrespondingMethodInClass(RD, MayBeBase);
2121
705
  }
2122
2123
  /// Find if \p RD declares a function that overrides this function, and if so,
2124
  /// return it. Does not search base classes.
2125
  CXXMethodDecl *getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
2126
                                                       bool MayBeBase = false);
2127
  const CXXMethodDecl *
2128
  getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
2129
172
                                        bool MayBeBase = false) const {
2130
172
    return const_cast<CXXMethodDecl *>(this)
2131
172
        ->getCorrespondingMethodDeclaredInClass(RD, MayBeBase);
2132
172
  }
2133
2134
  // Implement isa/cast/dyncast/etc.
2135
375M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2136
571M
  static bool classofKind(Kind K) {
2137
571M
    return K >= firstCXXMethod && 
K <= lastCXXMethod305M
;
2138
571M
  }
2139
};
2140
2141
/// Represents a C++ base or member initializer.
2142
///
2143
/// This is part of a constructor initializer that
2144
/// initializes one non-static member variable or one base class. For
2145
/// example, in the following, both 'A(a)' and 'f(3.14159)' are member
2146
/// initializers:
2147
///
2148
/// \code
2149
/// class A { };
2150
/// class B : public A {
2151
///   float f;
2152
/// public:
2153
///   B(A& a) : A(a), f(3.14159) { }
2154
/// };
2155
/// \endcode
2156
class CXXCtorInitializer final {
2157
  /// Either the base class name/delegating constructor type (stored as
2158
  /// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field
2159
  /// (IndirectFieldDecl*) being initialized.
2160
  llvm::PointerUnion<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *>
2161
      Initializee;
2162
2163
  /// The source location for the field name or, for a base initializer
2164
  /// pack expansion, the location of the ellipsis.
2165
  ///
2166
  /// In the case of a delegating
2167
  /// constructor, it will still include the type's source location as the
2168
  /// Initializee points to the CXXConstructorDecl (to allow loop detection).
2169
  SourceLocation MemberOrEllipsisLocation;
2170
2171
  /// The argument used to initialize the base or member, which may
2172
  /// end up constructing an object (when multiple arguments are involved).
2173
  Stmt *Init;
2174
2175
  /// Location of the left paren of the ctor-initializer.
2176
  SourceLocation LParenLoc;
2177
2178
  /// Location of the right paren of the ctor-initializer.
2179
  SourceLocation RParenLoc;
2180
2181
  /// If the initializee is a type, whether that type makes this
2182
  /// a delegating initialization.
2183
  unsigned IsDelegating : 1;
2184
2185
  /// If the initializer is a base initializer, this keeps track
2186
  /// of whether the base is virtual or not.
2187
  unsigned IsVirtual : 1;
2188
2189
  /// Whether or not the initializer is explicitly written
2190
  /// in the sources.
2191
  unsigned IsWritten : 1;
2192
2193
  /// If IsWritten is true, then this number keeps track of the textual order
2194
  /// of this initializer in the original sources, counting from 0.
2195
  unsigned SourceOrder : 13;
2196
2197
public:
2198
  /// Creates a new base-class initializer.
2199
  explicit
2200
  CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual,
2201
                     SourceLocation L, Expr *Init, SourceLocation R,
2202
                     SourceLocation EllipsisLoc);
2203
2204
  /// Creates a new member initializer.
2205
  explicit
2206
  CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
2207
                     SourceLocation MemberLoc, SourceLocation L, Expr *Init,
2208
                     SourceLocation R);
2209
2210
  /// Creates a new anonymous field initializer.
2211
  explicit
2212
  CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member,
2213
                     SourceLocation MemberLoc, SourceLocation L, Expr *Init,
2214
                     SourceLocation R);
2215
2216
  /// Creates a new delegating initializer.
2217
  explicit
2218
  CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
2219
                     SourceLocation L, Expr *Init, SourceLocation R);
2220
2221
  /// \return Unique reproducible object identifier.
2222
  int64_t getID(const ASTContext &Context) const;
2223
2224
  /// Determine whether this initializer is initializing a base class.
2225
485k
  bool isBaseInitializer() const {
2226
485k
    return Initializee.is<TypeSourceInfo*>() && 
!IsDelegating226k
;
2227
485k
  }
2228
2229
  /// Determine whether this initializer is initializing a non-static
2230
  /// data member.
2231
1.43M
  bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); }
2232
2233
646k
  bool isAnyMemberInitializer() const {
2234
646k
    return isMemberInitializer() || 
isIndirectMemberInitializer()97.8k
;
2235
646k
  }
2236
2237
188k
  bool isIndirectMemberInitializer() const {
2238
188k
    return Initializee.is<IndirectFieldDecl*>();
2239
188k
  }
2240
2241
  /// Determine whether this initializer is an implicit initializer
2242
  /// generated for a field with an initializer defined on the member
2243
  /// declaration.
2244
  ///
2245
  /// In-class member initializers (also known as "non-static data member
2246
  /// initializations", NSDMIs) were introduced in C++11.
2247
133k
  bool isInClassMemberInitializer() const {
2248
133k
    return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass;
2249
133k
  }
2250
2251
  /// Determine whether this initializer is creating a delegating
2252
  /// constructor.
2253
85.5k
  bool isDelegatingInitializer() const {
2254
85.5k
    return Initializee.is<TypeSourceInfo*>() && 
IsDelegating13.9k
;
2255
85.5k
  }
2256
2257
  /// Determine whether this initializer is a pack expansion.
2258
41.0k
  bool isPackExpansion() const {
2259
41.0k
    return isBaseInitializer() && 
MemberOrEllipsisLocation.isValid()14.5k
;
2260
41.0k
  }
2261
2262
  // For a pack expansion, returns the location of the ellipsis.
2263
697
  SourceLocation getEllipsisLoc() const {
2264
697
    assert(isPackExpansion() && "Initializer is not a pack expansion");
2265
697
    return MemberOrEllipsisLocation;
2266
697
  }
2267
2268
  /// If this is a base class initializer, returns the type of the
2269
  /// base class with location information. Otherwise, returns an NULL
2270
  /// type location.
2271
  TypeLoc getBaseClassLoc() const;
2272
2273
  /// If this is a base class initializer, returns the type of the base class.
2274
  /// Otherwise, returns null.
2275
  const Type *getBaseClass() const;
2276
2277
  /// Returns whether the base is virtual or not.
2278
36.4k
  bool isBaseVirtual() const {
2279
36.4k
    assert(isBaseInitializer() && "Must call this on base initializer!");
2280
2281
36.4k
    return IsVirtual;
2282
36.4k
  }
2283
2284
  /// Returns the declarator information for a base class or delegating
2285
  /// initializer.
2286
57.6k
  TypeSourceInfo *getTypeSourceInfo() const {
2287
57.6k
    return Initializee.dyn_cast<TypeSourceInfo *>();
2288
57.6k
  }
2289
2290
  /// If this is a member initializer, returns the declaration of the
2291
  /// non-static data member being initialized. Otherwise, returns null.
2292
180k
  FieldDecl *getMember() const {
2293
180k
    if (isMemberInitializer())
2294
178k
      return Initializee.get<FieldDecl*>();
2295
1.53k
    return nullptr;
2296
1.53k
  }
2297
2298
535k
  FieldDecl *getAnyMember() const {
2299
535k
    if (isMemberInitializer())
2300
526k
      return Initializee.get<FieldDecl*>();
2301
9.01k
    if (isIndirectMemberInitializer())
2302
1.06k
      return Initializee.get<IndirectFieldDecl*>()->getAnonField();
2303
7.95k
    return nullptr;
2304
7.95k
  }
2305
2306
55.2k
  IndirectFieldDecl *getIndirectMember() const {
2307
55.2k
    if (isIndirectMemberInitializer())
2308
1.09k
      return Initializee.get<IndirectFieldDecl*>();
2309
54.1k
    return nullptr;
2310
54.1k
  }
2311
2312
182k
  SourceLocation getMemberLocation() const {
2313
182k
    return MemberOrEllipsisLocation;
2314
182k
  }
2315
2316
  /// Determine the source location of the initializer.
2317
  SourceLocation getSourceLocation() const;
2318
2319
  /// Determine the source range covering the entire initializer.
2320
  SourceRange getSourceRange() const LLVM_READONLY;
2321
2322
  /// Determine whether this initializer is explicitly written
2323
  /// in the source code.
2324
163k
  bool isWritten() const { return IsWritten; }
2325
2326
  /// Return the source position of the initializer, counting from 0.
2327
  /// If the initializer was implicit, -1 is returned.
2328
20.5k
  int getSourceOrder() const {
2329
20.5k
    return IsWritten ? static_cast<int>(SourceOrder) : 
-10
;
2330
20.5k
  }
2331
2332
  /// Set the source order of this initializer.
2333
  ///
2334
  /// This can only be called once for each initializer; it cannot be called
2335
  /// on an initializer having a positive number of (implicit) array indices.
2336
  ///
2337
  /// This assumes that the initializer was written in the source code, and
2338
  /// ensures that isWritten() returns true.
2339
267k
  void setSourceOrder(int Pos) {
2340
267k
    assert(!IsWritten &&
2341
267k
           "setSourceOrder() used on implicit initializer");
2342
267k
    assert(SourceOrder == 0 &&
2343
267k
           "calling twice setSourceOrder() on the same initializer");
2344
267k
    assert(Pos >= 0 &&
2345
267k
           "setSourceOrder() used to make an initializer implicit");
2346
267k
    IsWritten = true;
2347
267k
    SourceOrder = static_cast<unsigned>(Pos);
2348
267k
  }
2349
2350
56.8k
  SourceLocation getLParenLoc() const { return LParenLoc; }
2351
56.9k
  SourceLocation getRParenLoc() const { return RParenLoc; }
2352
2353
  /// Get the initializer.
2354
410k
  Expr *getInit() const { return static_cast<Expr *>(Init); }
2355
};
2356
2357
/// Description of a constructor that was inherited from a base class.
2358
class InheritedConstructor {
2359
  ConstructorUsingShadowDecl *Shadow = nullptr;
2360
  CXXConstructorDecl *BaseCtor = nullptr;
2361
2362
public:
2363
1.82M
  InheritedConstructor() = default;
2364
  InheritedConstructor(ConstructorUsingShadowDecl *Shadow,
2365
                       CXXConstructorDecl *BaseCtor)
2366
310
      : Shadow(Shadow), BaseCtor(BaseCtor) {}
2367
2368
3.53M
  explicit operator bool() const { return Shadow; }
2369
2370
1.39k
  ConstructorUsingShadowDecl *getShadowDecl() const { return Shadow; }
2371
2.45k
  CXXConstructorDecl *getConstructor() const { return BaseCtor; }
2372
};
2373
2374
/// Represents a C++ constructor within a class.
2375
///
2376
/// For example:
2377
///
2378
/// \code
2379
/// class X {
2380
/// public:
2381
///   explicit X(int); // represented by a CXXConstructorDecl.
2382
/// };
2383
/// \endcode
2384
class CXXConstructorDecl final
2385
    : public CXXMethodDecl,
2386
      private llvm::TrailingObjects<CXXConstructorDecl, InheritedConstructor,
2387
                                    ExplicitSpecifier> {
2388
  // This class stores some data in DeclContext::CXXConstructorDeclBits
2389
  // to save some space. Use the provided accessors to access it.
2390
2391
  /// \name Support for base and member initializers.
2392
  /// \{
2393
  /// The arguments used to initialize the base or member.
2394
  LazyCXXCtorInitializersPtr CtorInitializers;
2395
2396
  CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2397
                     const DeclarationNameInfo &NameInfo, QualType T,
2398
                     TypeSourceInfo *TInfo, ExplicitSpecifier ES, bool isInline,
2399
                     bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
2400
                     InheritedConstructor Inherited,
2401
                     Expr *TrailingRequiresClause);
2402
2403
  void anchor() override;
2404
2405
48.4k
  size_t numTrailingObjects(OverloadToken<InheritedConstructor>) const {
2406
48.4k
    return CXXConstructorDeclBits.IsInheritingConstructor;
2407
48.4k
  }
2408
47.1k
  size_t numTrailingObjects(OverloadToken<ExplicitSpecifier>) const {
2409
47.1k
    return CXXConstructorDeclBits.HasTrailingExplicitSpecifier;
2410
47.1k
  }
2411
2412
2.58M
  ExplicitSpecifier getExplicitSpecifierInternal() const {
2413
2.58M
    if (CXXConstructorDeclBits.HasTrailingExplicitSpecifier)
2414
1.13k
      return *getTrailingObjects<ExplicitSpecifier>();
2415
2.58M
    return ExplicitSpecifier(
2416
2.58M
        nullptr, CXXConstructorDeclBits.IsSimpleExplicit
2417
380k
                     ? ExplicitSpecKind::ResolvedTrue
2418
2.20M
                     : ExplicitSpecKind::ResolvedFalse);
2419
2.58M
  }
2420
2421
  enum TraillingAllocKind {
2422
    TAKInheritsConstructor = 1,
2423
    TAKHasTailExplicit = 1 << 1,
2424
  };
2425
2426
47.1k
  uint64_t getTraillingAllocKind() const {
2427
47.1k
    return numTrailingObjects(OverloadToken<InheritedConstructor>()) |
2428
47.1k
           (numTrailingObjects(OverloadToken<ExplicitSpecifier>()) << 1);
2429
47.1k
  }
2430
2431
public:
2432
  friend class ASTDeclReader;
2433
  friend class ASTDeclWriter;
2434
  friend TrailingObjects;
2435
2436
  static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID,
2437
                                                uint64_t AllocKind);
2438
  static CXXConstructorDecl *
2439
  Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2440
         const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2441
         ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2442
         ConstexprSpecKind ConstexprKind,
2443
         InheritedConstructor Inherited = InheritedConstructor(),
2444
         Expr *TrailingRequiresClause = nullptr);
2445
2446
1.15M
  void setExplicitSpecifier(ExplicitSpecifier ES) {
2447
1.15M
    assert((!ES.getExpr() ||
2448
1.15M
            CXXConstructorDeclBits.HasTrailingExplicitSpecifier) &&
2449
1.15M
           "cannot set this explicit specifier. no trail-allocated space for "
2450
1.15M
           "explicit");
2451
1.15M
    if (ES.getExpr())
2452
164
      *getCanonicalDecl()->getTrailingObjects<ExplicitSpecifier>() = ES;
2453
1.15M
    else
2454
1.15M
      CXXConstructorDeclBits.IsSimpleExplicit = ES.isExplicit();
2455
1.15M
  }
2456
2457
1.50M
  ExplicitSpecifier getExplicitSpecifier() {
2458
1.50M
    return getCanonicalDecl()->getExplicitSpecifierInternal();
2459
1.50M
  }
2460
1.08M
  const ExplicitSpecifier getExplicitSpecifier() const {
2461
1.08M
    return getCanonicalDecl()->getExplicitSpecifierInternal();
2462
1.08M
  }
2463
2464
  /// Return true if the declartion is already resolved to be explicit.
2465
1.08M
  bool isExplicit() const { return getExplicitSpecifier().isExplicit(); }
2466
2467
  /// Iterates through the member/base initializer list.
2468
  using init_iterator = CXXCtorInitializer **;
2469
2470
  /// Iterates through the member/base initializer list.
2471
  using init_const_iterator = CXXCtorInitializer *const *;
2472
2473
  using init_range = llvm::iterator_range<init_iterator>;
2474
  using init_const_range = llvm::iterator_range<init_const_iterator>;
2475
2476
94.1k
  init_range inits() { return init_range(init_begin(), init_end()); }
2477
100k
  init_const_range inits() const {
2478
100k
    return init_const_range(init_begin(), init_end());
2479
100k
  }
2480
2481
  /// Retrieve an iterator to the first initializer.
2482
188k
  init_iterator init_begin() {
2483
188k
    const auto *ConstThis = this;
2484
188k
    return const_cast<init_iterator>(ConstThis->init_begin());
2485
188k
  }
2486
2487
  /// Retrieve an iterator to the first initializer.
2488
  init_const_iterator init_begin() const;
2489
2490
  /// Retrieve an iterator past the last initializer.
2491
94.1k
  init_iterator       init_end()       {
2492
94.1k
    return init_begin() + getNumCtorInitializers();
2493
94.1k
  }
2494
2495
  /// Retrieve an iterator past the last initializer.
2496
139k
  init_const_iterator init_end() const {
2497
139k
    return init_begin() + getNumCtorInitializers();
2498
139k
  }
2499
2500
  using init_reverse_iterator = std::reverse_iterator<init_iterator>;
2501
  using init_const_reverse_iterator =
2502
      std::reverse_iterator<init_const_iterator>;
2503
2504
0
  init_reverse_iterator init_rbegin() {
2505
0
    return init_reverse_iterator(init_end());
2506
0
  }
2507
0
  init_const_reverse_iterator init_rbegin() const {
2508
0
    return init_const_reverse_iterator(init_end());
2509
0
  }
2510
2511
0
  init_reverse_iterator init_rend() {
2512
0
    return init_reverse_iterator(init_begin());
2513
0
  }
2514
0
  init_const_reverse_iterator init_rend() const {
2515
0
    return init_const_reverse_iterator(init_begin());
2516
0
  }
2517
2518
  /// Determine the number of arguments used to initialize the member
2519
  /// or base.
2520
461k
  unsigned getNumCtorInitializers() const {
2521
461k
      return CXXConstructorDeclBits.NumCtorInitializers;
2522
461k
  }
2523
2524
1.20M
  void setNumCtorInitializers(unsigned numCtorInitializers) {
2525
1.20M
    CXXConstructorDeclBits.NumCtorInitializers = numCtorInitializers;
2526
    // This assert added because NumCtorInitializers is stored
2527
    // in CXXConstructorDeclBits as a bitfield and its width has
2528
    // been shrunk from 32 bits to fit into CXXConstructorDeclBitfields.
2529
1.20M
    assert(CXXConstructorDeclBits.NumCtorInitializers ==
2530
1.20M
           numCtorInitializers && "NumCtorInitializers overflow!");
2531
1.20M
  }
2532
2533
228k
  void setCtorInitializers(CXXCtorInitializer **Initializers) {
2534
228k
    CtorInitializers = Initializers;
2535
228k
  }
2536
2537
  /// Determine whether this constructor is a delegating constructor.
2538
58.6k
  bool isDelegatingConstructor() const {
2539
58.6k
    return (getNumCtorInitializers() == 1) &&
2540
29.9k
           init_begin()[0]->isDelegatingInitializer();
2541
58.6k
  }
2542
2543
  /// When this constructor delegates to another, retrieve the target.
2544
  CXXConstructorDecl *getTargetConstructor() const;
2545
2546
  /// Whether this constructor is a default
2547
  /// constructor (C++ [class.ctor]p5), which can be used to
2548
  /// default-initialize a class of this type.
2549
  bool isDefaultConstructor() const;
2550
2551
  /// Whether this constructor is a copy constructor (C++ [class.copy]p2,
2552
  /// which can be used to copy the class.
2553
  ///
2554
  /// \p TypeQuals will be set to the qualifiers on the
2555
  /// argument type. For example, \p TypeQuals would be set to \c
2556
  /// Qualifiers::Const for the following copy constructor:
2557
  ///
2558
  /// \code
2559
  /// class X {
2560
  /// public:
2561
  ///   X(const X&);
2562
  /// };
2563
  /// \endcode
2564
  bool isCopyConstructor(unsigned &TypeQuals) const;
2565
2566
  /// Whether this constructor is a copy
2567
  /// constructor (C++ [class.copy]p2, which can be used to copy the
2568
  /// class.
2569
651k
  bool isCopyConstructor() const {
2570
651k
    unsigned TypeQuals = 0;
2571
651k
    return isCopyConstructor(TypeQuals);
2572
651k
  }
2573
2574
  /// Determine whether this constructor is a move constructor
2575
  /// (C++11 [class.copy]p3), which can be used to move values of the class.
2576
  ///
2577
  /// \param TypeQuals If this constructor is a move constructor, will be set
2578
  /// to the type qualifiers on the referent of the first parameter's type.
2579
  bool isMoveConstructor(unsigned &TypeQuals) const;
2580
2581
  /// Determine whether this constructor is a move constructor
2582
  /// (C++11 [class.copy]p3), which can be used to move values of the class.
2583
752k
  bool isMoveConstructor() const {
2584
752k
    unsigned TypeQuals = 0;
2585
752k
    return isMoveConstructor(TypeQuals);
2586
752k
  }
2587
2588
  /// Determine whether this is a copy or move constructor.
2589
  ///
2590
  /// \param TypeQuals Will be set to the type qualifiers on the reference
2591
  /// parameter, if in fact this is a copy or move constructor.
2592
  bool isCopyOrMoveConstructor(unsigned &TypeQuals) const;
2593
2594
  /// Determine whether this a copy or move constructor.
2595
1.07M
  bool isCopyOrMoveConstructor() const {
2596
1.07M
    unsigned Quals;
2597
1.07M
    return isCopyOrMoveConstructor(Quals);
2598
1.07M
  }
2599
2600
  /// Whether this constructor is a
2601
  /// converting constructor (C++ [class.conv.ctor]), which can be
2602
  /// used for user-defined conversions.
2603
  bool isConvertingConstructor(bool AllowExplicit) const;
2604
2605
  /// Determine whether this is a member template specialization that
2606
  /// would copy the object to itself. Such constructors are never used to copy
2607
  /// an object.
2608
  bool isSpecializationCopyingObject() const;
2609
2610
  /// Determine whether this is an implicit constructor synthesized to
2611
  /// model a call to a constructor inherited from a base class.
2612
1.88M
  bool isInheritingConstructor() const {
2613
1.88M
    return CXXConstructorDeclBits.IsInheritingConstructor;
2614
1.88M
  }
2615
2616
  /// State that this is an implicit constructor synthesized to
2617
  /// model a call to a constructor inherited from a base class.
2618
1.03M
  void setInheritingConstructor(bool isIC = true) {
2619
1.03M
    CXXConstructorDeclBits.IsInheritingConstructor = isIC;
2620
1.03M
  }
2621
2622
  /// Get the constructor that this inheriting constructor is based on.
2623
917k
  InheritedConstructor getInheritedConstructor() const {
2624
917k
    return isInheritingConstructor() ?
2625
912k
      
*getTrailingObjects<InheritedConstructor>()5.19k
: InheritedConstructor();
2626
917k
  }
2627
2628
31.2M
  CXXConstructorDecl *getCanonicalDecl() override {
2629
31.2M
    return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl());
2630
31.2M
  }
2631
1.08M
  const CXXConstructorDecl *getCanonicalDecl() const {
2632
1.08M
    return const_cast<CXXConstructorDecl*>(this)->getCanonicalDecl();
2633
1.08M
  }
2634
2635
  // Implement isa/cast/dyncast/etc.
2636
148M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2637
148M
  static bool classofKind(Kind K) { return K == CXXConstructor; }
2638
};
2639
2640
/// Represents a C++ destructor within a class.
2641
///
2642
/// For example:
2643
///
2644
/// \code
2645
/// class X {
2646
/// public:
2647
///   ~X(); // represented by a CXXDestructorDecl.
2648
/// };
2649
/// \endcode
2650
class CXXDestructorDecl : public CXXMethodDecl {
2651
  friend class ASTDeclReader;
2652
  friend class ASTDeclWriter;
2653
2654
  // FIXME: Don't allocate storage for these except in the first declaration
2655
  // of a virtual destructor.
2656
  FunctionDecl *OperatorDelete = nullptr;
2657
  Expr *OperatorDeleteThisArg = nullptr;
2658
2659
  CXXDestructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2660
                    const DeclarationNameInfo &NameInfo, QualType T,
2661
                    TypeSourceInfo *TInfo, bool isInline,
2662
                    bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
2663
                    Expr *TrailingRequiresClause = nullptr)
2664
      : CXXMethodDecl(CXXDestructor, C, RD, StartLoc, NameInfo, T, TInfo,
2665
                      SC_None, isInline, ConstexprKind, SourceLocation(),
2666
166k
                      TrailingRequiresClause) {
2667
166k
    setImplicit(isImplicitlyDeclared);
2668
166k
  }
2669
2670
  void anchor() override;
2671
2672
public:
2673
  static CXXDestructorDecl *Create(ASTContext &C, CXXRecordDecl *RD,
2674
                                   SourceLocation StartLoc,
2675
                                   const DeclarationNameInfo &NameInfo,
2676
                                   QualType T, TypeSourceInfo *TInfo,
2677
                                   bool isInline, bool isImplicitlyDeclared,
2678
                                   ConstexprSpecKind ConstexprKind,
2679
                                   Expr *TrailingRequiresClause = nullptr);
2680
  static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID);
2681
2682
  void setOperatorDelete(FunctionDecl *OD, Expr *ThisArg);
2683
2684
44.5k
  const FunctionDecl *getOperatorDelete() const {
2685
44.5k
    return getCanonicalDecl()->OperatorDelete;
2686
44.5k
  }
2687
2688
11.0k
  Expr *getOperatorDeleteThisArg() const {
2689
11.0k
    return getCanonicalDecl()->OperatorDeleteThisArg;
2690
11.0k
  }
2691
2692
7.52M
  CXXDestructorDecl *getCanonicalDecl() override {
2693
7.52M
    return cast<CXXDestructorDecl>(FunctionDecl::getCanonicalDecl());
2694
7.52M
  }
2695
55.5k
  const CXXDestructorDecl *getCanonicalDecl() const {
2696
55.5k
    return const_cast<CXXDestructorDecl*>(this)->getCanonicalDecl();
2697
55.5k
  }
2698
2699
  // Implement isa/cast/dyncast/etc.
2700
110M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2701
110M
  static bool classofKind(Kind K) { return K == CXXDestructor; }
2702
};
2703
2704
/// Represents a C++ conversion function within a class.
2705
///
2706
/// For example:
2707
///
2708
/// \code
2709
/// class X {
2710
/// public:
2711
///   operator bool();
2712
/// };
2713
/// \endcode
2714
class CXXConversionDecl : public CXXMethodDecl {
2715
  CXXConversionDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2716
                    const DeclarationNameInfo &NameInfo, QualType T,
2717
                    TypeSourceInfo *TInfo, bool isInline, ExplicitSpecifier ES,
2718
                    ConstexprSpecKind ConstexprKind, SourceLocation EndLocation,
2719
                    Expr *TrailingRequiresClause = nullptr)
2720
      : CXXMethodDecl(CXXConversion, C, RD, StartLoc, NameInfo, T, TInfo,
2721
                      SC_None, isInline, ConstexprKind, EndLocation,
2722
                      TrailingRequiresClause),
2723
38.2k
        ExplicitSpec(ES) {}
2724
  void anchor() override;
2725
2726
  ExplicitSpecifier ExplicitSpec;
2727
2728
public:
2729
  friend class ASTDeclReader;
2730
  friend class ASTDeclWriter;
2731
2732
  static CXXConversionDecl *
2733
  Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2734
         const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2735
         bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
2736
         SourceLocation EndLocation, Expr *TrailingRequiresClause = nullptr);
2737
  static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2738
2739
21.0k
  ExplicitSpecifier getExplicitSpecifier() {
2740
21.0k
    return getCanonicalDecl()->ExplicitSpec;
2741
21.0k
  }
2742
2743
1.05M
  const ExplicitSpecifier getExplicitSpecifier() const {
2744
1.05M
    return getCanonicalDecl()->ExplicitSpec;
2745
1.05M
  }
2746
2747
  /// Return true if the declartion is already resolved to be explicit.
2748
1.05M
  bool isExplicit() const { return getExplicitSpecifier().isExplicit(); }
2749
4.09k
  void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; }
2750
2751
  /// Returns the type that this conversion function is converting to.
2752
1.30M
  QualType getConversionType() const {
2753
1.30M
    return getType()->castAs<FunctionType>()->getReturnType();
2754
1.30M
  }
2755
2756
  /// Determine whether this conversion function is a conversion from
2757
  /// a lambda closure type to a block pointer.
2758
  bool isLambdaToBlockPointerConversion() const;
2759
2760
3.69M
  CXXConversionDecl *getCanonicalDecl() override {
2761
3.69M
    return cast<CXXConversionDecl>(FunctionDecl::getCanonicalDecl());
2762
3.69M
  }
2763
1.05M
  const CXXConversionDecl *getCanonicalDecl() const {
2764
1.05M
    return const_cast<CXXConversionDecl*>(this)->getCanonicalDecl();
2765
1.05M
  }
2766
2767
  // Implement isa/cast/dyncast/etc.
2768
14.4M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2769
14.4M
  static bool classofKind(Kind K) { return K == CXXConversion; }
2770
};
2771
2772
/// Represents a linkage specification.
2773
///
2774
/// For example:
2775
/// \code
2776
///   extern "C" void foo();
2777
/// \endcode
2778
class LinkageSpecDecl : public Decl, public DeclContext {
2779
  virtual void anchor();
2780
  // This class stores some data in DeclContext::LinkageSpecDeclBits to save
2781
  // some space. Use the provided accessors to access it.
2782
public:
2783
  /// Represents the language in a linkage specification.
2784
  ///
2785
  /// The values are part of the serialization ABI for
2786
  /// ASTs and cannot be changed without altering that ABI.
2787
  enum LanguageIDs { lang_c = 1, lang_cxx = 2 };
2788
2789
private:
2790
  /// The source location for the extern keyword.
2791
  SourceLocation ExternLoc;
2792
2793
  /// The source location for the right brace (if valid).
2794
  SourceLocation RBraceLoc;
2795
2796
  LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
2797
                  SourceLocation LangLoc, LanguageIDs lang, bool HasBraces);
2798
2799
public:
2800
  static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC,
2801
                                 SourceLocation ExternLoc,
2802
                                 SourceLocation LangLoc, LanguageIDs Lang,
2803
                                 bool HasBraces);
2804
  static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2805
2806
  /// Return the language specified by this linkage specification.
2807
6.62M
  LanguageIDs getLanguage() const {
2808
6.62M
    return static_cast<LanguageIDs>(LinkageSpecDeclBits.Language);
2809
6.62M
  }
2810
2811
  /// Set the language specified by this linkage specification.
2812
279k
  void setLanguage(LanguageIDs L) { LinkageSpecDeclBits.Language = L; }
2813
2814
  /// Determines whether this linkage specification had braces in
2815
  /// its syntactic form.
2816
229k
  bool hasBraces() const {
2817
229k
    assert(!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces);
2818
229k
    return LinkageSpecDeclBits.HasBraces;
2819
229k
  }
2820
2821
26.3k
  SourceLocation getExternLoc() const { return ExternLoc; }
2822
55.5k
  SourceLocation getRBraceLoc() const { return RBraceLoc; }
2823
22.7k
  void setExternLoc(SourceLocation L) { ExternLoc = L; }
2824
88.8k
  void setRBraceLoc(SourceLocation L) {
2825
88.8k
    RBraceLoc = L;
2826
88.8k
    LinkageSpecDeclBits.HasBraces = RBraceLoc.isValid();
2827
88.8k
  }
2828
2829
31.4k
  SourceLocation getEndLoc() const LLVM_READONLY {
2830
31.4k
    if (hasBraces())
2831
31.3k
      return getRBraceLoc();
2832
    // No braces: get the end location of the (only) declaration in context
2833
    // (if present).
2834
51
    return decls_empty() ? 
getLocation()0
: decls_begin()->getEndLoc();
2835
51
  }
2836
2837
31.4k
  SourceRange getSourceRange() const override LLVM_READONLY {
2838
31.4k
    return SourceRange(ExternLoc, getEndLoc());
2839
31.4k
  }
2840
2841
767k
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2842
38.0M
  static bool classofKind(Kind K) { return K == LinkageSpec; }
2843
2844
12.6k
  static DeclContext *castToDeclContext(const LinkageSpecDecl *D) {
2845
12.6k
    return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D));
2846
12.6k
  }
2847
2848
0
  static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) {
2849
0
    return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC));
2850
0
  }
2851
};
2852
2853
/// Represents C++ using-directive.
2854
///
2855
/// For example:
2856
/// \code
2857
///    using namespace std;
2858
/// \endcode
2859
///
2860
/// \note UsingDirectiveDecl should be Decl not NamedDecl, but we provide
2861
/// artificial names for all using-directives in order to store
2862
/// them in DeclContext effectively.
2863
class UsingDirectiveDecl : public NamedDecl {
2864
  /// The location of the \c using keyword.
2865
  SourceLocation UsingLoc;
2866
2867
  /// The location of the \c namespace keyword.
2868
  SourceLocation NamespaceLoc;
2869
2870
  /// The nested-name-specifier that precedes the namespace.
2871
  NestedNameSpecifierLoc QualifierLoc;
2872
2873
  /// The namespace nominated by this using-directive.
2874
  NamedDecl *NominatedNamespace;
2875
2876
  /// Enclosing context containing both using-directive and nominated
2877
  /// namespace.
2878
  DeclContext *CommonAncestor;
2879
2880
  UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc,
2881
                     SourceLocation NamespcLoc,
2882
                     NestedNameSpecifierLoc QualifierLoc,
2883
                     SourceLocation IdentLoc,
2884
                     NamedDecl *Nominated,
2885
                     DeclContext *CommonAncestor)
2886
      : NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc),
2887
        NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc),
2888
5.11k
        NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) {}
2889
2890
  /// Returns special DeclarationName used by using-directives.
2891
  ///
2892
  /// This is only used by DeclContext for storing UsingDirectiveDecls in
2893
  /// its lookup structure.
2894
54.7M
  static DeclarationName getName() {
2895
54.7M
    return DeclarationName::getUsingDirectiveName();
2896
54.7M
  }
2897
2898
  void anchor() override;
2899
2900
public:
2901
  friend class ASTDeclReader;
2902
2903
  // Friend for getUsingDirectiveName.
2904
  friend class DeclContext;
2905
2906
  /// Retrieve the nested-name-specifier that qualifies the
2907
  /// name of the namespace, with source-location information.
2908
1.19k
  NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
2909
2910
  /// Retrieve the nested-name-specifier that qualifies the
2911
  /// name of the namespace.
2912
8
  NestedNameSpecifier *getQualifier() const {
2913
8
    return QualifierLoc.getNestedNameSpecifier();
2914
8
  }
2915
2916
10
  NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; }
2917
6
  const NamedDecl *getNominatedNamespaceAsWritten() const {
2918
6
    return NominatedNamespace;
2919
6
  }
2920
2921
  /// Returns the namespace nominated by this using-directive.
2922
  NamespaceDecl *getNominatedNamespace();
2923
2924
824
  const NamespaceDecl *getNominatedNamespace() const {
2925
824
    return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace();
2926
824
  }
2927
2928
  /// Returns the common ancestor context of this using-directive and
2929
  /// its nominated namespace.
2930
644
  DeclContext *getCommonAncestor() { return CommonAncestor; }
2931
0
  const DeclContext *getCommonAncestor() const { return CommonAncestor; }
2932
2933
  /// Return the location of the \c using keyword.
2934
267
  SourceLocation getUsingLoc() const { return UsingLoc; }
2935
2936
  // FIXME: Could omit 'Key' in name.
2937
  /// Returns the location of the \c namespace keyword.
2938
281
  SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; }
2939
2940
  /// Returns the location of this using declaration's identifier.
2941
140
  SourceLocation getIdentLocation() const { return getLocation(); }
2942
2943
  static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC,
2944
                                    SourceLocation UsingLoc,
2945
                                    SourceLocation NamespaceLoc,
2946
                                    NestedNameSpecifierLoc QualifierLoc,
2947
                                    SourceLocation IdentLoc,
2948
                                    NamedDecl *Nominated,
2949
                                    DeclContext *CommonAncestor);
2950
  static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2951
2952
74
  SourceRange getSourceRange() const override LLVM_READONLY {
2953
74
    return SourceRange(UsingLoc, getLocation());
2954
74
  }
2955
2956
17.2M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2957
17.2M
  static bool classofKind(Kind K) { return K == UsingDirective; }
2958
};
2959
2960
/// Represents a C++ namespace alias.
2961
///
2962
/// For example:
2963
///
2964
/// \code
2965
/// namespace Foo = Bar;
2966
/// \endcode
2967
class NamespaceAliasDecl : public NamedDecl,
2968
                           public Redeclarable<NamespaceAliasDecl> {
2969
  friend class ASTDeclReader;
2970
2971
  /// The location of the \c namespace keyword.
2972
  SourceLocation NamespaceLoc;
2973
2974
  /// The location of the namespace's identifier.
2975
  ///
2976
  /// This is accessed by TargetNameLoc.
2977
  SourceLocation IdentLoc;
2978
2979
  /// The nested-name-specifier that precedes the namespace.
2980
  NestedNameSpecifierLoc QualifierLoc;
2981
2982
  /// The Decl that this alias points to, either a NamespaceDecl or
2983
  /// a NamespaceAliasDecl.
2984
  NamedDecl *Namespace;
2985
2986
  NamespaceAliasDecl(ASTContext &C, DeclContext *DC,
2987
                     SourceLocation NamespaceLoc, SourceLocation AliasLoc,
2988
                     IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc,
2989
                     SourceLocation IdentLoc, NamedDecl *Namespace)
2990
      : NamedDecl(NamespaceAlias, DC, AliasLoc, Alias), redeclarable_base(C),
2991
        NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc),
2992
345
        QualifierLoc(QualifierLoc), Namespace(Namespace) {}
2993
2994
  void anchor() override;
2995
2996
  using redeclarable_base = Redeclarable<NamespaceAliasDecl>;
2997
2998
  NamespaceAliasDecl *getNextRedeclarationImpl() override;
2999
  NamespaceAliasDecl *getPreviousDeclImpl() override;
3000
  NamespaceAliasDecl *getMostRecentDeclImpl() override;
3001
3002
public:
3003
  static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC,
3004
                                    SourceLocation NamespaceLoc,
3005
                                    SourceLocation AliasLoc,
3006
                                    IdentifierInfo *Alias,
3007
                                    NestedNameSpecifierLoc QualifierLoc,
3008
                                    SourceLocation IdentLoc,
3009
                                    NamedDecl *Namespace);
3010
3011
  static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3012
3013
  using redecl_range = redeclarable_base::redecl_range;
3014
  using redecl_iterator = redeclarable_base::redecl_iterator;
3015
3016
  using redeclarable_base::redecls_begin;
3017
  using redeclarable_base::redecls_end;
3018
  using redeclarable_base::redecls;
3019
  using redeclarable_base::getPreviousDecl;
3020
  using redeclarable_base::getMostRecentDecl;
3021
3022
269
  NamespaceAliasDecl *getCanonicalDecl() override {
3023
269
    return getFirstDecl();
3024
269
  }
3025
0
  const NamespaceAliasDecl *getCanonicalDecl() const {
3026
0
    return getFirstDecl();
3027
0
  }
3028
3029
  /// Retrieve the nested-name-specifier that qualifies the
3030
  /// name of the namespace, with source-location information.
3031
296
  NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3032
3033
  /// Retrieve the nested-name-specifier that qualifies the
3034
  /// name of the namespace.
3035
7
  NestedNameSpecifier *getQualifier() const {
3036
7
    return QualifierLoc.getNestedNameSpecifier();
3037
7
  }
3038
3039
  /// Retrieve the namespace declaration aliased by this directive.
3040
6.45k
  NamespaceDecl *getNamespace() {
3041
6.45k
    if (auto *AD = dyn_cast<NamespaceAliasDecl>(Namespace))
3042
145
      return AD->getNamespace();
3043
3044
6.31k
    return cast<NamespaceDecl>(Namespace);
3045
6.31k
  }
3046
3047
14
  const NamespaceDecl *getNamespace() const {
3048
14
    return const_cast<NamespaceAliasDecl *>(this)->getNamespace();
3049
14
  }
3050
3051
  /// Returns the location of the alias name, i.e. 'foo' in
3052
  /// "namespace foo = ns::bar;".
3053
5
  SourceLocation getAliasLoc() const { return getLocation(); }
3054
3055
  /// Returns the location of the \c namespace keyword.
3056
18
  SourceLocation getNamespaceLoc() const { return NamespaceLoc; }
3057
3058
  /// Returns the location of the identifier in the named namespace.
3059
29
  SourceLocation getTargetNameLoc() const { return IdentLoc; }
3060
3061
  /// Retrieve the namespace that this alias refers to, which
3062
  /// may either be a NamespaceDecl or a NamespaceAliasDecl.
3063
101
  NamedDecl *getAliasedNamespace() const { return Namespace; }
3064
3065
47
  SourceRange getSourceRange() const override LLVM_READONLY {
3066
47
    return SourceRange(NamespaceLoc, IdentLoc);
3067
47
  }
3068
3069
35.3M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3070
35.3M
  static bool classofKind(Kind K) { return K == NamespaceAlias; }
3071
};
3072
3073
/// Implicit declaration of a temporary that was materialized by
3074
/// a MaterializeTemporaryExpr and lifetime-extended by a declaration
3075
class LifetimeExtendedTemporaryDecl final
3076
    : public Decl,
3077
      public Mergeable<LifetimeExtendedTemporaryDecl> {
3078
  friend class MaterializeTemporaryExpr;
3079
  friend class ASTDeclReader;
3080
3081
  Stmt *ExprWithTemporary = nullptr;
3082
3083
  /// The declaration which lifetime-extended this reference, if any.
3084
  /// Either a VarDecl, or (for a ctor-initializer) a FieldDecl.
3085
  ValueDecl *ExtendingDecl = nullptr;
3086
  unsigned ManglingNumber;
3087
3088
  mutable APValue *Value = nullptr;
3089
3090
  virtual void anchor();
3091
3092
  LifetimeExtendedTemporaryDecl(Expr *Temp, ValueDecl *EDecl, unsigned Mangling)
3093
      : Decl(Decl::LifetimeExtendedTemporary, EDecl->getDeclContext(),
3094
             EDecl->getLocation()),
3095
        ExprWithTemporary(Temp), ExtendingDecl(EDecl),
3096
2.19k
        ManglingNumber(Mangling) {}
3097
3098
  LifetimeExtendedTemporaryDecl(EmptyShell)
3099
23
      : Decl(Decl::LifetimeExtendedTemporary, EmptyShell{}) {}
3100
3101
public:
3102
  static LifetimeExtendedTemporaryDecl *Create(Expr *Temp, ValueDecl *EDec,
3103
2.19k
                                               unsigned Mangling) {
3104
2.19k
    return new (EDec->getASTContext(), EDec->getDeclContext())
3105
2.19k
        LifetimeExtendedTemporaryDecl(Temp, EDec, Mangling);
3106
2.19k
  }
3107
  static LifetimeExtendedTemporaryDecl *CreateDeserialized(ASTContext &C,
3108
23
                                                           unsigned ID) {
3109
23
    return new (C, ID) LifetimeExtendedTemporaryDecl(EmptyShell{});
3110
23
  }
3111
3112
1.70k
  ValueDecl *getExtendingDecl() { return ExtendingDecl; }
3113
10.5k
  const ValueDecl *getExtendingDecl() const { return ExtendingDecl; }
3114
3115
  /// Retrieve the storage duration for the materialized temporary.
3116
  StorageDuration getStorageDuration() const;
3117
3118
  /// Retrieve the expression to which the temporary materialization conversion
3119
  /// was applied. This isn't necessarily the initializer of the temporary due
3120
  /// to the C++98 delayed materialization rules, but
3121
  /// skipRValueSubobjectAdjustments can be used to find said initializer within
3122
  /// the subexpression.
3123
26.2k
  Expr *getTemporaryExpr() { return cast<Expr>(ExprWithTemporary); }
3124
0
  const Expr *getTemporaryExpr() const { return cast<Expr>(ExprWithTemporary); }
3125
3126
259
  unsigned getManglingNumber() const { return ManglingNumber; }
3127
3128
  /// Get the storage for the constant value of a materialized temporary
3129
  /// of static storage duration.
3130
  APValue *getOrCreateValue(bool MayCreate) const;
3131
3132
39
  APValue *getValue() const { return Value; }
3133
3134
  // Iterators
3135
6.19k
  Stmt::child_range childrenExpr() {
3136
6.19k
    return Stmt::child_range(&ExprWithTemporary, &ExprWithTemporary + 1);
3137
6.19k
  }
3138
3139
0
  Stmt::const_child_range childrenExpr() const {
3140
0
    return Stmt::const_child_range(&ExprWithTemporary, &ExprWithTemporary + 1);
3141
0
  }
3142
3143
36.1M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3144
36.1M
  static bool classofKind(Kind K) {
3145
36.1M
    return K == Decl::LifetimeExtendedTemporary;
3146
36.1M
  }
3147
};
3148
3149
/// Represents a shadow declaration introduced into a scope by a
3150
/// (resolved) using declaration.
3151
///
3152
/// For example,
3153
/// \code
3154
/// namespace A {
3155
///   void foo();
3156
/// }
3157
/// namespace B {
3158
///   using A::foo; // <- a UsingDecl
3159
///                 // Also creates a UsingShadowDecl for A::foo() in B
3160
/// }
3161
/// \endcode
3162
class UsingShadowDecl : public NamedDecl, public Redeclarable<UsingShadowDecl> {
3163
  friend class UsingDecl;
3164
3165
  /// The referenced declaration.
3166
  NamedDecl *Underlying = nullptr;
3167
3168
  /// The using declaration which introduced this decl or the next using
3169
  /// shadow declaration contained in the aforementioned using declaration.
3170
  NamedDecl *UsingOrNextShadow = nullptr;
3171
3172
  void anchor() override;
3173
3174
  using redeclarable_base = Redeclarable<UsingShadowDecl>;
3175
3176
181k
  UsingShadowDecl *getNextRedeclarationImpl() override {
3177
181k
    return getNextRedeclaration();
3178
181k
  }
3179
3180
521
  UsingShadowDecl *getPreviousDeclImpl() override {
3181
521
    return getPreviousDecl();
3182
521
  }
3183
3184
383k
  UsingShadowDecl *getMostRecentDeclImpl() override {
3185
383k
    return getMostRecentDecl();
3186
383k
  }
3187
3188
protected:
3189
  UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC, SourceLocation Loc,
3190
                  UsingDecl *Using, NamedDecl *Target);
3191
  UsingShadowDecl(Kind K, ASTContext &C, EmptyShell);
3192
3193
public:
3194
  friend class ASTDeclReader;
3195
  friend class ASTDeclWriter;
3196
3197
  static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC,
3198
                                 SourceLocation Loc, UsingDecl *Using,
3199
172k
                                 NamedDecl *Target) {
3200
172k
    return new (C, DC) UsingShadowDecl(UsingShadow, C, DC, Loc, Using, Target);
3201
172k
  }
3202
3203
  static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3204
3205
  using redecl_range = redeclarable_base::redecl_range;
3206
  using redecl_iterator = redeclarable_base::redecl_iterator;
3207
3208
  using redeclarable_base::redecls_begin;
3209
  using redeclarable_base::redecls_end;
3210
  using redeclarable_base::redecls;
3211
  using redeclarable_base::getPreviousDecl;
3212
  using redeclarable_base::getMostRecentDecl;
3213
  using redeclarable_base::isFirstDecl;
3214
3215
1.01M
  UsingShadowDecl *getCanonicalDecl() override {
3216
1.01M
    return getFirstDecl();
3217
1.01M
  }
3218
0
  const UsingShadowDecl *getCanonicalDecl() const {
3219
0
    return getFirstDecl();
3220
0
  }
3221
3222
  /// Gets the underlying declaration which has been brought into the
3223
  /// local scope.
3224
1.51M
  NamedDecl *getTargetDecl() const { return Underlying; }
3225
3226
  /// Sets the underlying declaration which has been brought into the
3227
  /// local scope.
3228
174k
  void setTargetDecl(NamedDecl *ND) {
3229
174k
    assert(ND && "Target decl is null!");
3230
174k
    Underlying = ND;
3231
    // A UsingShadowDecl is never a friend or local extern declaration, even
3232
    // if it is a shadow declaration for one.
3233
174k
    IdentifierNamespace =
3234
174k
        ND->getIdentifierNamespace() &
3235
174k
        ~(IDNS_OrdinaryFriend | IDNS_TagFriend | IDNS_LocalExtern);
3236
174k
  }
3237
3238
  /// Gets the using declaration to which this declaration is tied.
3239
  UsingDecl *getUsingDecl() const;
3240
3241
  /// The next using shadow declaration contained in the shadow decl
3242
  /// chain of the using declaration which introduced this decl.
3243
428k
  UsingShadowDecl *getNextUsingShadowDecl() const {
3244
428k
    return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow);
3245
428k
  }
3246
3247
72.9M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3248
72.9M
  static bool classofKind(Kind K) {
3249
72.9M
    return K == Decl::UsingShadow || 
K == Decl::ConstructorUsingShadow69.2M
;
3250
72.9M
  }
3251
};
3252
3253
/// Represents a shadow constructor declaration introduced into a
3254
/// class by a C++11 using-declaration that names a constructor.
3255
///
3256
/// For example:
3257
/// \code
3258
/// struct Base { Base(int); };
3259
/// struct Derived {
3260
///    using Base::Base; // creates a UsingDecl and a ConstructorUsingShadowDecl
3261
/// };
3262
/// \endcode
3263
class ConstructorUsingShadowDecl final : public UsingShadowDecl {
3264
  /// If this constructor using declaration inherted the constructor
3265
  /// from an indirect base class, this is the ConstructorUsingShadowDecl
3266
  /// in the named direct base class from which the declaration was inherited.
3267
  ConstructorUsingShadowDecl *NominatedBaseClassShadowDecl = nullptr;
3268
3269
  /// If this constructor using declaration inherted the constructor
3270
  /// from an indirect base class, this is the ConstructorUsingShadowDecl
3271
  /// that will be used to construct the unique direct or virtual base class
3272
  /// that receives the constructor arguments.
3273
  ConstructorUsingShadowDecl *ConstructedBaseClassShadowDecl = nullptr;
3274
3275
  /// \c true if the constructor ultimately named by this using shadow
3276
  /// declaration is within a virtual base class subobject of the class that
3277
  /// contains this declaration.
3278
  unsigned IsVirtual : 1;
3279
3280
  ConstructorUsingShadowDecl(ASTContext &C, DeclContext *DC, SourceLocation Loc,
3281
                             UsingDecl *Using, NamedDecl *Target,
3282
                             bool TargetInVirtualBase)
3283
      : UsingShadowDecl(ConstructorUsingShadow, C, DC, Loc, Using,
3284
                        Target->getUnderlyingDecl()),
3285
        NominatedBaseClassShadowDecl(
3286
            dyn_cast<ConstructorUsingShadowDecl>(Target)),
3287
        ConstructedBaseClassShadowDecl(NominatedBaseClassShadowDecl),
3288
2.14k
        IsVirtual(TargetInVirtualBase) {
3289
    // If we found a constructor that chains to a constructor for a virtual
3290
    // base, we should directly call that virtual base constructor instead.
3291
    // FIXME: This logic belongs in Sema.
3292
2.14k
    if (NominatedBaseClassShadowDecl &&
3293
801
        NominatedBaseClassShadowDecl->constructsVirtualBase()) {
3294
79
      ConstructedBaseClassShadowDecl =
3295
79
          NominatedBaseClassShadowDecl->ConstructedBaseClassShadowDecl;
3296
79
      IsVirtual = true;
3297
79
    }
3298
2.14k
  }
3299
3300
  ConstructorUsingShadowDecl(ASTContext &C, EmptyShell Empty)
3301
68
      : UsingShadowDecl(ConstructorUsingShadow, C, Empty), IsVirtual(false) {}
3302
3303
  void anchor() override;
3304
3305
public:
3306
  friend class ASTDeclReader;
3307
  friend class ASTDeclWriter;
3308
3309
  static ConstructorUsingShadowDecl *Create(ASTContext &C, DeclContext *DC,
3310
                                            SourceLocation Loc,
3311
                                            UsingDecl *Using, NamedDecl *Target,
3312
                                            bool IsVirtual);
3313
  static ConstructorUsingShadowDecl *CreateDeserialized(ASTContext &C,
3314
                                                        unsigned ID);
3315
3316
  /// Returns the parent of this using shadow declaration, which
3317
  /// is the class in which this is declared.
3318
  //@{
3319
0
  const CXXRecordDecl *getParent() const {
3320
0
    return cast<CXXRecordDecl>(getDeclContext());
3321
0
  }
3322
4.79k
  CXXRecordDecl *getParent() {
3323
4.79k
    return cast<CXXRecordDecl>(getDeclContext());
3324
4.79k
  }
3325
  //@}
3326
3327
  /// Get the inheriting constructor declaration for the direct base
3328
  /// class from which this using shadow declaration was inherited, if there is
3329
  /// one. This can be different for each redeclaration of the same shadow decl.
3330
975
  ConstructorUsingShadowDecl *getNominatedBaseClassShadowDecl() const {
3331
975
    return NominatedBaseClassShadowDecl;
3332
975
  }
3333
3334
  /// Get the inheriting constructor declaration for the base class
3335
  /// for which we don't have an explicit initializer, if there is one.
3336
159
  ConstructorUsingShadowDecl *getConstructedBaseClassShadowDecl() const {
3337
159
    return ConstructedBaseClassShadowDecl;
3338
159
  }
3339
3340
  /// Get the base class that was named in the using declaration. This
3341
  /// can be different for each redeclaration of this same shadow decl.
3342
  CXXRecordDecl *getNominatedBaseClass() const;
3343
3344
  /// Get the base class whose constructor or constructor shadow
3345
  /// declaration is passed the constructor arguments.
3346
927
  CXXRecordDecl *getConstructedBaseClass() const {
3347
927
    return cast<CXXRecordDecl>((ConstructedBaseClassShadowDecl
3348
316
                                    ? ConstructedBaseClassShadowDecl
3349
611
                                    : getTargetDecl())
3350
927
                                   ->getDeclContext());
3351
927
  }
3352
3353
  /// Returns \c true if the constructed base class is a virtual base
3354
  /// class subobject of this declaration's class.
3355
2.99k
  bool constructsVirtualBase() const {
3356
2.99k
    return IsVirtual;
3357
2.99k
  }
3358
3359
2.76M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3360
2.76M
  static bool classofKind(Kind K) { return K == ConstructorUsingShadow; }
3361
};
3362
3363
/// Represents a C++ using-declaration.
3364
///
3365
/// For example:
3366
/// \code
3367
///    using someNameSpace::someIdentifier;
3368
/// \endcode
3369
class UsingDecl : public NamedDecl, public Mergeable<UsingDecl> {
3370
  /// The source location of the 'using' keyword itself.
3371
  SourceLocation UsingLocation;
3372
3373
  /// The nested-name-specifier that precedes the name.
3374
  NestedNameSpecifierLoc QualifierLoc;
3375
3376
  /// Provides source/type location info for the declaration name
3377
  /// embedded in the ValueDecl base class.
3378
  DeclarationNameLoc DNLoc;
3379
3380
  /// The first shadow declaration of the shadow decl chain associated
3381
  /// with this using declaration.
3382
  ///
3383
  /// The bool member of the pair store whether this decl has the \c typename
3384
  /// keyword.
3385
  llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow;
3386
3387
  UsingDecl(DeclContext *DC, SourceLocation UL,
3388
            NestedNameSpecifierLoc QualifierLoc,
3389
            const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword)
3390
    : NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()),
3391
      UsingLocation(UL), QualifierLoc(QualifierLoc),
3392
133k
      DNLoc(NameInfo.getInfo()), FirstUsingShadow(nullptr, HasTypenameKeyword) {
3393
133k
  }
3394
3395
  void anchor() override;
3396
3397
public:
3398
  friend class ASTDeclReader;
3399
  friend class ASTDeclWriter;
3400
3401
  /// Return the source location of the 'using' keyword.
3402
8.06k
  SourceLocation getUsingLoc() const { return UsingLocation; }
3403
3404
  /// Set the source location of the 'using' keyword.
3405
2.24k
  void setUsingLoc(SourceLocation L) { UsingLocation = L; }
3406
3407
  /// Retrieve the nested-name-specifier that qualifies the name,
3408
  /// with source-location information.
3409
12.9k
  NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3410
3411
  /// Retrieve the nested-name-specifier that qualifies the name.
3412
16.1k
  NestedNameSpecifier *getQualifier() const {
3413
16.1k
    return QualifierLoc.getNestedNameSpecifier();
3414
16.1k
  }
3415
3416
8.93k
  DeclarationNameInfo getNameInfo() const {
3417
8.93k
    return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
3418
8.93k
  }
3419
3420
  /// Return true if it is a C++03 access declaration (no 'using').
3421
497
  bool isAccessDeclaration() const { return UsingLocation.isInvalid(); }
3422
3423
  /// Return true if the using declaration has 'typename'.
3424
9.04k
  bool hasTypename() const { return FirstUsingShadow.getInt(); }
3425
3426
  /// Sets whether the using declaration has 'typename'.
3427
2.24k
  void setTypename(bool TN) { FirstUsingShadow.setInt(TN); }
3428
3429
  /// Iterates through the using shadow declarations associated with
3430
  /// this using declaration.
3431
  class shadow_iterator {
3432
    /// The current using shadow declaration.
3433
    UsingShadowDecl *Current = nullptr;
3434
3435
  public:
3436
    using value_type = UsingShadowDecl *;
3437
    using reference = UsingShadowDecl *;
3438
    using pointer = UsingShadowDecl *;
3439
    using iterator_category = std::forward_iterator_tag;
3440
    using difference_type = std::ptrdiff_t;
3441
3442
457k
    shadow_iterator() = default;
3443
389k
    explicit shadow_iterator(UsingShadowDecl *C) : Current(C) {}
3444
3445
415k
    reference operator*() const { return Current; }
3446
0
    pointer operator->() const { return Current; }
3447
3448
428k
    shadow_iterator& operator++() {
3449
428k
      Current = Current->getNextUsingShadowDecl();
3450
428k
      return *this;
3451
428k
    }
3452
3453
0
    shadow_iterator operator++(int) {
3454
0
      shadow_iterator tmp(*this);
3455
0
      ++(*this);
3456
0
      return tmp;
3457
0
    }
3458
3459
174k
    friend bool operator==(shadow_iterator x, shadow_iterator y) {
3460
174k
      return x.Current == y.Current;
3461
174k
    }
3462
712k
    friend bool operator!=(shadow_iterator x, shadow_iterator y) {
3463
712k
      return x.Current != y.Current;
3464
712k
    }
3465
  };
3466
3467
  using shadow_range = llvm::iterator_range<shadow_iterator>;
3468
3469
2.16k
  shadow_range shadows() const {
3470
2.16k
    return shadow_range(shadow_begin(), shadow_end());
3471
2.16k
  }
3472
3473
389k
  shadow_iterator shadow_begin() const {
3474
389k
    return shadow_iterator(FirstUsingShadow.getPointer());
3475
389k
  }
3476
3477
457k
  shadow_iterator shadow_end() const { return shadow_iterator(); }
3478
3479
  /// Return the number of shadowed declarations associated with this
3480
  /// using declaration.
3481
106k
  unsigned shadow_size() const {
3482
106k
    return std::distance(shadow_begin(), shadow_end());
3483
106k
  }
3484
3485
  void addShadowDecl(UsingShadowDecl *S);
3486
  void removeShadowDecl(UsingShadowDecl *S);
3487
3488
  static UsingDecl *Create(ASTContext &C, DeclContext *DC,
3489
                           SourceLocation UsingL,
3490
                           NestedNameSpecifierLoc QualifierLoc,
3491
                           const DeclarationNameInfo &NameInfo,
3492
                           bool HasTypenameKeyword);
3493
3494
  static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3495
3496
  SourceRange getSourceRange() const override LLVM_READONLY;
3497
3498
  /// Retrieves the canonical declaration of this declaration.
3499
297k
  UsingDecl *getCanonicalDecl() override { return getFirstDecl(); }
3500
0
  const UsingDecl *getCanonicalDecl() const { return getFirstDecl(); }
3501
3502
64.1M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3503
64.1M
  static bool classofKind(Kind K) { return K == Using; }
3504
};
3505
3506
/// Represents a pack of using declarations that a single
3507
/// using-declarator pack-expanded into.
3508
///
3509
/// \code
3510
/// template<typename ...T> struct X : T... {
3511
///   using T::operator()...;
3512
///   using T::operator T...;
3513
/// };
3514
/// \endcode
3515
///
3516
/// In the second case above, the UsingPackDecl will have the name
3517
/// 'operator T' (which contains an unexpanded pack), but the individual
3518
/// UsingDecls and UsingShadowDecls will have more reasonable names.
3519
class UsingPackDecl final
3520
    : public NamedDecl, public Mergeable<UsingPackDecl>,
3521
      private llvm::TrailingObjects<UsingPackDecl, NamedDecl *> {
3522
  /// The UnresolvedUsingValueDecl or UnresolvedUsingTypenameDecl from
3523
  /// which this waas instantiated.
3524
  NamedDecl *InstantiatedFrom;
3525
3526
  /// The number of using-declarations created by this pack expansion.
3527
  unsigned NumExpansions;
3528
3529
  UsingPackDecl(DeclContext *DC, NamedDecl *InstantiatedFrom,
3530
                ArrayRef<NamedDecl *> UsingDecls)
3531
      : NamedDecl(UsingPack, DC,
3532
                  InstantiatedFrom ? InstantiatedFrom->getLocation()
3533
                                   : SourceLocation(),
3534
                  InstantiatedFrom ? InstantiatedFrom->getDeclName()
3535
                                   : DeclarationName()),
3536
54
        InstantiatedFrom(InstantiatedFrom), NumExpansions(UsingDecls.size()) {
3537
54
    std::uninitialized_copy(UsingDecls.begin(), UsingDecls.end(),
3538
54
                            getTrailingObjects<NamedDecl *>());
3539
54
  }
3540
3541
  void anchor() override;
3542
3543
public:
3544
  friend class ASTDeclReader;
3545
  friend class ASTDeclWriter;
3546
  friend TrailingObjects;
3547
3548
  /// Get the using declaration from which this was instantiated. This will
3549
  /// always be an UnresolvedUsingValueDecl or an UnresolvedUsingTypenameDecl
3550
  /// that is a pack expansion.
3551
38
  NamedDecl *getInstantiatedFromUsingDecl() const { return InstantiatedFrom; }
3552
3553
  /// Get the set of using declarations that this pack expanded into. Note that
3554
  /// some of these may still be unresolved.
3555
45
  ArrayRef<NamedDecl *> expansions() const {
3556
45
    return llvm::makeArrayRef(getTrailingObjects<NamedDecl *>(), NumExpansions);
3557
45
  }
3558
3559
  static UsingPackDecl *Create(ASTContext &C, DeclContext *DC,
3560
                               NamedDecl *InstantiatedFrom,
3561
                               ArrayRef<NamedDecl *> UsingDecls);
3562
3563
  static UsingPackDecl *CreateDeserialized(ASTContext &C, unsigned ID,
3564
                                           unsigned NumExpansions);
3565
3566
0
  SourceRange getSourceRange() const override LLVM_READONLY {
3567
0
    return InstantiatedFrom->getSourceRange();
3568
0
  }
3569
3570
6
  UsingPackDecl *getCanonicalDecl() override { return getFirstDecl(); }
3571
0
  const UsingPackDecl *getCanonicalDecl() const { return getFirstDecl(); }
3572
3573
799k
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3574
799k
  static bool classofKind(Kind K) { return K == UsingPack; }
3575
};
3576
3577
/// Represents a dependent using declaration which was not marked with
3578
/// \c typename.
3579
///
3580
/// Unlike non-dependent using declarations, these *only* bring through
3581
/// non-types; otherwise they would break two-phase lookup.
3582
///
3583
/// \code
3584
/// template \<class T> class A : public Base<T> {
3585
///   using Base<T>::foo;
3586
/// };
3587
/// \endcode
3588
class UnresolvedUsingValueDecl : public ValueDecl,
3589
                                 public Mergeable<UnresolvedUsingValueDecl> {
3590
  /// The source location of the 'using' keyword
3591
  SourceLocation UsingLocation;
3592
3593
  /// If this is a pack expansion, the location of the '...'.
3594
  SourceLocation EllipsisLoc;
3595
3596
  /// The nested-name-specifier that precedes the name.
3597
  NestedNameSpecifierLoc QualifierLoc;
3598
3599
  /// Provides source/type location info for the declaration name
3600
  /// embedded in the ValueDecl base class.
3601
  DeclarationNameLoc DNLoc;
3602
3603
  UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty,
3604
                           SourceLocation UsingLoc,
3605
                           NestedNameSpecifierLoc QualifierLoc,
3606
                           const DeclarationNameInfo &NameInfo,
3607
                           SourceLocation EllipsisLoc)
3608
      : ValueDecl(UnresolvedUsingValue, DC,
3609
                  NameInfo.getLoc(), NameInfo.getName(), Ty),
3610
        UsingLocation(UsingLoc), EllipsisLoc(EllipsisLoc),
3611
559
        QualifierLoc(QualifierLoc), DNLoc(NameInfo.getInfo()) {}
3612
3613
  void anchor() override;
3614
3615
public:
3616
  friend class ASTDeclReader;
3617
  friend class ASTDeclWriter;
3618
3619
  /// Returns the source location of the 'using' keyword.
3620
605
  SourceLocation getUsingLoc() const { return UsingLocation; }
3621
3622
  /// Set the source location of the 'using' keyword.
3623
71
  void setUsingLoc(SourceLocation L) { UsingLocation = L; }
3624
3625
  /// Return true if it is a C++03 access declaration (no 'using').
3626
110
  bool isAccessDeclaration() const { return UsingLocation.isInvalid(); }
3627
3628
  /// Retrieve the nested-name-specifier that qualifies the name,
3629
  /// with source-location information.
3630
909
  NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3631
3632
  /// Retrieve the nested-name-specifier that qualifies the name.
3633
231
  NestedNameSpecifier *getQualifier() const {
3634
231
    return QualifierLoc.getNestedNameSpecifier();
3635
231
  }
3636
3637
809
  DeclarationNameInfo getNameInfo() const {
3638
809
    return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
3639
809
  }
3640
3641
  /// Determine whether this is a pack expansion.
3642
607
  bool isPackExpansion() const {
3643
607
    return EllipsisLoc.isValid();
3644
607
  }
3645
3646
  /// Get the location of the ellipsis if this is a pack expansion.
3647
1.02k
  SourceLocation getEllipsisLoc() const {
3648
1.02k
    return EllipsisLoc;
3649
1.02k
  }
3650
3651
  static UnresolvedUsingValueDecl *
3652
    Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
3653
           NestedNameSpecifierLoc QualifierLoc,
3654
           const DeclarationNameInfo &NameInfo, SourceLocation EllipsisLoc);
3655
3656
  static UnresolvedUsingValueDecl *
3657
  CreateDeserialized(ASTContext &C, unsigned ID);
3658
3659
  SourceRange getSourceRange() const override LLVM_READONLY;
3660
3661
  /// Retrieves the canonical declaration of this declaration.
3662
1.48k
  UnresolvedUsingValueDecl *getCanonicalDecl() override {
3663
1.48k
    return getFirstDecl();
3664
1.48k
  }
3665
0
  const UnresolvedUsingValueDecl *getCanonicalDecl() const {
3666
0
    return getFirstDecl();
3667
0
  }
3668
3669
245M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3670
245M
  static bool classofKind(Kind K) { return K == UnresolvedUsingValue; }
3671
};
3672
3673
/// Represents a dependent using declaration which was marked with
3674
/// \c typename.
3675
///
3676
/// \code
3677
/// template \<class T> class A : public Base<T> {
3678
///   using typename Base<T>::foo;
3679
/// };
3680
/// \endcode
3681
///
3682
/// The type associated with an unresolved using typename decl is
3683
/// currently always a typename type.
3684
class UnresolvedUsingTypenameDecl
3685
    : public TypeDecl,
3686
      public Mergeable<UnresolvedUsingTypenameDecl> {
3687
  friend class ASTDeclReader;
3688
3689
  /// The source location of the 'typename' keyword
3690
  SourceLocation TypenameLocation;
3691
3692
  /// If this is a pack expansion, the location of the '...'.
3693
  SourceLocation EllipsisLoc;
3694
3695
  /// The nested-name-specifier that precedes the name.
3696
  NestedNameSpecifierLoc QualifierLoc;
3697
3698
  UnresolvedUsingTypenameDecl(DeclContext *DC, SourceLocation UsingLoc,
3699
                              SourceLocation TypenameLoc,
3700
                              NestedNameSpecifierLoc QualifierLoc,
3701
                              SourceLocation TargetNameLoc,
3702
                              IdentifierInfo *TargetName,
3703
                              SourceLocation EllipsisLoc)
3704
    : TypeDecl(UnresolvedUsingTypename, DC, TargetNameLoc, TargetName,
3705
               UsingLoc),
3706
      TypenameLocation(TypenameLoc), EllipsisLoc(EllipsisLoc),
3707
1.11k
      QualifierLoc(QualifierLoc) {}
3708
3709
  void anchor() override;
3710
3711
public:
3712
  /// Returns the source location of the 'using' keyword.
3713
875
  SourceLocation getUsingLoc() const { return getBeginLoc(); }
3714
3715
  /// Returns the source location of the 'typename' keyword.
3716
974
  SourceLocation getTypenameLoc() const { return TypenameLocation; }
3717
3718
  /// Retrieve the nested-name-specifier that qualifies the name,
3719
  /// with source-location information.
3720
1.08k
  NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3721
3722
  /// Retrieve the nested-name-specifier that qualifies the name.
3723
42
  NestedNameSpecifier *getQualifier() const {
3724
42
    return QualifierLoc.getNestedNameSpecifier();
3725
42
  }
3726
3727
680
  DeclarationNameInfo getNameInfo() const {
3728
680
    return DeclarationNameInfo(getDeclName(), getLocation());
3729
680
  }
3730
3731
  /// Determine whether this is a pack expansion.
3732
794
  bool isPackExpansion() const {
3733
794
    return EllipsisLoc.isValid();
3734
794
  }
3735
3736
  /// Get the location of the ellipsis if this is a pack expansion.
3737
1.64k
  SourceLocation getEllipsisLoc() const {
3738
1.64k
    return EllipsisLoc;
3739
1.64k
  }
3740
3741
  static UnresolvedUsingTypenameDecl *
3742
    Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
3743
           SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc,
3744
           SourceLocation TargetNameLoc, DeclarationName TargetName,
3745
           SourceLocation EllipsisLoc);
3746
3747
  static UnresolvedUsingTypenameDecl *
3748
  CreateDeserialized(ASTContext &C, unsigned ID);
3749
3750
  /// Retrieves the canonical declaration of this declaration.
3751
3.29k
  UnresolvedUsingTypenameDecl *getCanonicalDecl() override {
3752
3.29k
    return getFirstDecl();
3753
3.29k
  }
3754
0
  const UnresolvedUsingTypenameDecl *getCanonicalDecl() const {
3755
0
    return getFirstDecl();
3756
0
  }
3757
3758
2.64M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3759
2.64M
  static bool classofKind(Kind K) { return K == UnresolvedUsingTypename; }
3760
};
3761
3762
/// Represents a C++11 static_assert declaration.
3763
class StaticAssertDecl : public Decl {
3764
  llvm::PointerIntPair<Expr *, 1, bool> AssertExprAndFailed;
3765
  StringLiteral *Message;
3766
  SourceLocation RParenLoc;
3767
3768
  StaticAssertDecl(DeclContext *DC, SourceLocation StaticAssertLoc,
3769
                   Expr *AssertExpr, StringLiteral *Message,
3770
                   SourceLocation RParenLoc, bool Failed)
3771
      : Decl(StaticAssert, DC, StaticAssertLoc),
3772
        AssertExprAndFailed(AssertExpr, Failed), Message(Message),
3773
101k
        RParenLoc(RParenLoc) {}
3774
3775
  virtual void anchor();
3776
3777
public:
3778
  friend class ASTDeclReader;
3779
3780
  static StaticAssertDecl *Create(ASTContext &C, DeclContext *DC,
3781
                                  SourceLocation StaticAssertLoc,
3782
                                  Expr *AssertExpr, StringLiteral *Message,
3783
                                  SourceLocation RParenLoc, bool Failed);
3784
  static StaticAssertDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3785
3786
57.5k
  Expr *getAssertExpr() { return AssertExprAndFailed.getPointer(); }
3787
2.52k
  const Expr *getAssertExpr() const { return AssertExprAndFailed.getPointer(); }
3788
3789
57.5k
  StringLiteral *getMessage() { return Message; }
3790
2.52k
  const StringLiteral *getMessage() const { return Message; }
3791
3792
90.9k
  bool isFailed() const { return AssertExprAndFailed.getInt(); }
3793
3794
53.3k
  SourceLocation getRParenLoc() const { return RParenLoc; }
3795
3796
62
  SourceRange getSourceRange() const override LLVM_READONLY {
3797
62
    return SourceRange(getLocation(), getRParenLoc());
3798
62
  }
3799
3800
43.3M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3801
43.3M
  static bool classofKind(Kind K) { return K == StaticAssert; }
3802
};
3803
3804
/// A binding in a decomposition declaration. For instance, given:
3805
///
3806
///   int n[3];
3807
///   auto &[a, b, c] = n;
3808
///
3809
/// a, b, and c are BindingDecls, whose bindings are the expressions
3810
/// x[0], x[1], and x[2] respectively, where x is the implicit
3811
/// DecompositionDecl of type 'int (&)[3]'.
3812
class BindingDecl : public ValueDecl {
3813
  /// The declaration that this binding binds to part of.
3814
  LazyDeclPtr Decomp;
3815
  /// The binding represented by this declaration. References to this
3816
  /// declaration are effectively equivalent to this expression (except
3817
  /// that it is only evaluated once at the point of declaration of the
3818
  /// binding).
3819
  Expr *Binding = nullptr;
3820
3821
  BindingDecl(DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id)
3822
662
      : ValueDecl(Decl::Binding, DC, IdLoc, Id, QualType()) {}
3823
3824
  void anchor() override;
3825
3826
public:
3827
  friend class ASTDeclReader;
3828
3829
  static BindingDecl *Create(ASTContext &C, DeclContext *DC,
3830
                             SourceLocation IdLoc, IdentifierInfo *Id);
3831
  static BindingDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3832
3833
  /// Get the expression to which this declaration is bound. This may be null
3834
  /// in two different cases: while parsing the initializer for the
3835
  /// decomposition declaration, and when the initializer is type-dependent.
3836
2.84k
  Expr *getBinding() const { return Binding; }
3837
3838
  /// Get the decomposition declaration that this binding represents a
3839
  /// decomposition of.
3840
  ValueDecl *getDecomposedDecl() const;
3841
3842
  /// Get the variable (if any) that holds the value of evaluating the binding.
3843
  /// Only present for user-defined bindings for tuple-like types.
3844
  VarDecl *getHoldingVar() const;
3845
3846
  /// Set the binding for this BindingDecl, along with its declared type (which
3847
  /// should be a possibly-cv-qualified form of the type of the binding, or a
3848
  /// reference to such a type).
3849
508
  void setBinding(QualType DeclaredType, Expr *Binding) {
3850
508
    setType(DeclaredType);
3851
508
    this->Binding = Binding;
3852
508
  }
3853
3854
  /// Set the decomposed variable for this BindingDecl.
3855
662
  void setDecomposedDecl(ValueDecl *Decomposed) { Decomp = Decomposed; }
3856
3857
22.1M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3858
22.1M
  static bool classofKind(Kind K) { return K == Decl::Binding; }
3859
};
3860
3861
/// A decomposition declaration. For instance, given:
3862
///
3863
///   int n[3];
3864
///   auto &[a, b, c] = n;
3865
///
3866
/// the second line declares a DecompositionDecl of type 'int (&)[3]', and
3867
/// three BindingDecls (named a, b, and c). An instance of this class is always
3868
/// unnamed, but behaves in almost all other respects like a VarDecl.
3869
class DecompositionDecl final
3870
    : public VarDecl,
3871
      private llvm::TrailingObjects<DecompositionDecl, BindingDecl *> {
3872
  /// The number of BindingDecl*s following this object.
3873
  unsigned NumBindings;
3874
3875
  DecompositionDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
3876
                    SourceLocation LSquareLoc, QualType T,
3877
                    TypeSourceInfo *TInfo, StorageClass SC,
3878
                    ArrayRef<BindingDecl *> Bindings)
3879
      : VarDecl(Decomposition, C, DC, StartLoc, LSquareLoc, nullptr, T, TInfo,
3880
                SC),
3881
375
        NumBindings(Bindings.size()) {
3882
375
    std::uninitialized_copy(Bindings.begin(), Bindings.end(),
3883
375
                            getTrailingObjects<BindingDecl *>());
3884
375
    for (auto *B : Bindings)
3885
650
      B->setDecomposedDecl(this);
3886
375
  }
3887
3888
  void anchor() override;
3889
3890
public:
3891
  friend class ASTDeclReader;
3892
  friend TrailingObjects;
3893
3894
  static DecompositionDecl *Create(ASTContext &C, DeclContext *DC,
3895
                                   SourceLocation StartLoc,
3896
                                   SourceLocation LSquareLoc,
3897
                                   QualType T, TypeSourceInfo *TInfo,
3898
                                   StorageClass S,
3899
                                   ArrayRef<BindingDecl *> Bindings);
3900
  static DecompositionDecl *CreateDeserialized(ASTContext &C, unsigned ID,
3901
                                               unsigned NumBindings);
3902
3903
1.51k
  ArrayRef<BindingDecl *> bindings() const {
3904
1.51k
    return llvm::makeArrayRef(getTrailingObjects<BindingDecl *>(), NumBindings);
3905
1.51k
  }
3906
3907
  void printName(raw_ostream &os) const override;
3908
3909
81.2M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3910
81.2M
  static bool classofKind(Kind K) { return K == Decomposition; }
3911
};
3912
3913
/// An instance of this class represents the declaration of a property
3914
/// member.  This is a Microsoft extension to C++, first introduced in
3915
/// Visual Studio .NET 2003 as a parallel to similar features in C#
3916
/// and Managed C++.
3917
///
3918
/// A property must always be a non-static class member.
3919
///
3920
/// A property member superficially resembles a non-static data
3921
/// member, except preceded by a property attribute:
3922
///   __declspec(property(get=GetX, put=PutX)) int x;
3923
/// Either (but not both) of the 'get' and 'put' names may be omitted.
3924
///
3925
/// A reference to a property is always an lvalue.  If the lvalue
3926
/// undergoes lvalue-to-rvalue conversion, then a getter name is
3927
/// required, and that member is called with no arguments.
3928
/// If the lvalue is assigned into, then a setter name is required,
3929
/// and that member is called with one argument, the value assigned.
3930
/// Both operations are potentially overloaded.  Compound assignments
3931
/// are permitted, as are the increment and decrement operators.
3932
///
3933
/// The getter and putter methods are permitted to be overloaded,
3934
/// although their return and parameter types are subject to certain
3935
/// restrictions according to the type of the property.
3936
///
3937
/// A property declared using an incomplete array type may
3938
/// additionally be subscripted, adding extra parameters to the getter
3939
/// and putter methods.
3940
class MSPropertyDecl : public DeclaratorDecl {
3941
  IdentifierInfo *GetterId, *SetterId;
3942
3943
  MSPropertyDecl(DeclContext *DC, SourceLocation L, DeclarationName N,
3944
                 QualType T, TypeSourceInfo *TInfo, SourceLocation StartL,
3945
                 IdentifierInfo *Getter, IdentifierInfo *Setter)
3946
      : DeclaratorDecl(MSProperty, DC, L, N, T, TInfo, StartL),
3947
136
        GetterId(Getter), SetterId(Setter) {}
3948
3949
  void anchor() override;
3950
public:
3951
  friend class ASTDeclReader;
3952
3953
  static MSPropertyDecl *Create(ASTContext &C, DeclContext *DC,
3954
                                SourceLocation L, DeclarationName N, QualType T,
3955
                                TypeSourceInfo *TInfo, SourceLocation StartL,
3956
                                IdentifierInfo *Getter, IdentifierInfo *Setter);
3957
  static MSPropertyDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3958
3959
4.72M
  static bool classof(const Decl *D) { return D->getKind() == MSProperty; }
3960
3961
177
  bool hasGetter() const { return GetterId != nullptr; }
3962
214
  IdentifierInfo* getGetterId() const { return GetterId; }
3963
100
  bool hasSetter() const { return SetterId != nullptr; }
3964
124
  IdentifierInfo* getSetterId() const { return SetterId; }
3965
};
3966
3967
/// Parts of a decomposed MSGuidDecl. Factored out to avoid unnecessary
3968
/// dependencies on DeclCXX.h.
3969
struct MSGuidDeclParts {
3970
  /// {01234567-...
3971
  uint32_t Part1;
3972
  /// ...-89ab-...
3973
  uint16_t Part2;
3974
  /// ...-cdef-...
3975
  uint16_t Part3;
3976
  /// ...-0123-456789abcdef}
3977
  uint8_t Part4And5[8];
3978
3979
231
  uint64_t getPart4And5AsUint64() const {
3980
231
    uint64_t Val;
3981
231
    memcpy(&Val, &Part4And5, sizeof(Part4And5));
3982
231
    return Val;
3983
231
  }
3984
};
3985
3986
/// A global _GUID constant. These are implicitly created by UuidAttrs.
3987
///
3988
///   struct _declspec(uuid("01234567-89ab-cdef-0123-456789abcdef")) X{};
3989
///
3990
/// X is a CXXRecordDecl that contains a UuidAttr that references the (unique)
3991
/// MSGuidDecl for the specified UUID.
3992
class MSGuidDecl : public ValueDecl,
3993
                   public Mergeable<MSGuidDecl>,
3994
                   public llvm::FoldingSetNode {
3995
public:
3996
  using Parts = MSGuidDeclParts;
3997
3998
private:
3999
  /// The decomposed form of the UUID.
4000
  Parts PartVal;
4001
4002
  /// The resolved value of the UUID as an APValue. Computed on demand and
4003
  /// cached.
4004
  mutable APValue APVal;
4005
4006
  void anchor() override;
4007
4008
  MSGuidDecl(DeclContext *DC, QualType T, Parts P);
4009
4010
  static MSGuidDecl *Create(const ASTContext &C, QualType T, Parts P);
4011
  static MSGuidDecl *CreateDeserialized(ASTContext &C, unsigned ID);
4012
4013
  // Only ASTContext::getMSGuidDecl and deserialization create these.
4014
  friend class ASTContext;
4015
  friend class ASTReader;
4016
  friend class ASTDeclReader;
4017
4018
public:
4019
  /// Print this UUID in a human-readable format.
4020
  void printName(llvm::raw_ostream &OS) const override;
4021
4022
  /// Get the decomposed parts of this declaration.
4023
81
  Parts getParts() const { return PartVal; }
4024
4025
  /// Get the value of this MSGuidDecl as an APValue. This may fail and return
4026
  /// an absent APValue if the type of the declaration is not of the expected
4027
  /// shape.
4028
  APValue &getAsAPValue() const;
4029
4030
231
  static void Profile(llvm::FoldingSetNodeID &ID, Parts P) {
4031
231
    ID.AddInteger(P.Part1);
4032
231
    ID.AddInteger(P.Part2);
4033
231
    ID.AddInteger(P.Part3);
4034
231
    ID.AddInteger(P.getPart4And5AsUint64());
4035
231
  }
4036
84
  void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, PartVal); }
4037
4038
23.2M
  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
4039
23.2M
  static bool classofKind(Kind K) { return K == Decl::MSGuid; }
4040
};
4041
4042
/// Insertion operator for diagnostics.  This allows sending an AccessSpecifier
4043
/// into a diagnostic with <<.
4044
const StreamingDiagnostic &operator<<(const StreamingDiagnostic &DB,
4045
                                      AccessSpecifier AS);
4046
4047
} // namespace clang
4048
4049
#endif // LLVM_CLANG_AST_DECLCXX_H