1 //===- DeclCXX.cpp - C++ Declaration AST Node Implementation --------------===//
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
7 //===----------------------------------------------------------------------===//
9 // This file implements the C++ related Decl classes.
11 //===----------------------------------------------------------------------===//
13 #include "clang/AST/DeclCXX.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/ASTLambda.h"
16 #include "clang/AST/ASTMutationListener.h"
17 #include "clang/AST/ASTUnresolvedSet.h"
18 #include "clang/AST/Attr.h"
19 #include "clang/AST/CXXInheritance.h"
20 #include "clang/AST/DeclBase.h"
21 #include "clang/AST/DeclTemplate.h"
22 #include "clang/AST/DeclarationName.h"
23 #include "clang/AST/Expr.h"
24 #include "clang/AST/ExprCXX.h"
25 #include "clang/AST/LambdaCapture.h"
26 #include "clang/AST/NestedNameSpecifier.h"
27 #include "clang/AST/ODRHash.h"
28 #include "clang/AST/Type.h"
29 #include "clang/AST/TypeLoc.h"
30 #include "clang/AST/UnresolvedSet.h"
31 #include "clang/Basic/Diagnostic.h"
32 #include "clang/Basic/IdentifierTable.h"
33 #include "clang/Basic/LLVM.h"
34 #include "clang/Basic/LangOptions.h"
35 #include "clang/Basic/OperatorKinds.h"
36 #include "clang/Basic/PartialDiagnostic.h"
37 #include "clang/Basic/SourceLocation.h"
38 #include "clang/Basic/Specifiers.h"
39 #include "llvm/ADT/None.h"
40 #include "llvm/ADT/SmallPtrSet.h"
41 #include "llvm/ADT/SmallVector.h"
42 #include "llvm/ADT/iterator_range.h"
43 #include "llvm/Support/Casting.h"
44 #include "llvm/Support/ErrorHandling.h"
45 #include "llvm/Support/raw_ostream.h"
51 using namespace clang;
53 //===----------------------------------------------------------------------===//
54 // Decl Allocation/Deallocation Method Implementations
55 //===----------------------------------------------------------------------===//
57 void AccessSpecDecl::anchor() {}
59 AccessSpecDecl *AccessSpecDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
60 return new (C, ID) AccessSpecDecl(EmptyShell());
63 void LazyASTUnresolvedSet::getFromExternalSource(ASTContext &C) const {
64 ExternalASTSource *Source = C.getExternalSource();
65 assert(Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set");
66 assert(Source && "getFromExternalSource with no external source");
68 for (ASTUnresolvedSet::iterator I = Impl.begin(); I != Impl.end(); ++I)
69 I.setDecl(cast<NamedDecl>(Source->GetExternalDecl(
70 reinterpret_cast<uintptr_t>(I.getDecl()) >> 2)));
71 Impl.Decls.setLazy(false);
74 CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
75 : UserDeclaredConstructor(false), UserDeclaredSpecialMembers(0),
76 Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
77 Abstract(false), IsStandardLayout(true), IsCXX11StandardLayout(true),
78 HasBasesWithFields(false), HasBasesWithNonStaticDataMembers(false),
79 HasPrivateFields(false), HasProtectedFields(false),
80 HasPublicFields(false), HasMutableFields(false), HasVariantMembers(false),
81 HasOnlyCMembers(true), HasInClassInitializer(false),
82 HasUninitializedReferenceMember(false), HasUninitializedFields(false),
83 HasInheritedConstructor(false), HasInheritedAssignment(false),
84 NeedOverloadResolutionForCopyConstructor(false),
85 NeedOverloadResolutionForMoveConstructor(false),
86 NeedOverloadResolutionForMoveAssignment(false),
87 NeedOverloadResolutionForDestructor(false),
88 DefaultedCopyConstructorIsDeleted(false),
89 DefaultedMoveConstructorIsDeleted(false),
90 DefaultedMoveAssignmentIsDeleted(false),
91 DefaultedDestructorIsDeleted(false), HasTrivialSpecialMembers(SMF_All),
92 HasTrivialSpecialMembersForCall(SMF_All),
93 DeclaredNonTrivialSpecialMembers(0),
94 DeclaredNonTrivialSpecialMembersForCall(0), HasIrrelevantDestructor(true),
95 HasConstexprNonCopyMoveConstructor(false),
96 HasDefaultedDefaultConstructor(false),
97 DefaultedDefaultConstructorIsConstexpr(true),
98 HasConstexprDefaultConstructor(false),
99 DefaultedDestructorIsConstexpr(true),
100 HasNonLiteralTypeFieldsOrBases(false),
101 UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
102 ImplicitCopyConstructorCanHaveConstParamForVBase(true),
103 ImplicitCopyConstructorCanHaveConstParamForNonVBase(true),
104 ImplicitCopyAssignmentHasConstParam(true),
105 HasDeclaredCopyConstructorWithConstParam(false),
106 HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
107 IsParsingBaseSpecifiers(false), ComputedVisibleConversions(false),
108 HasODRHash(false), Definition(D) {}
110 CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
111 return Bases.get(Definition->getASTContext().getExternalSource());
114 CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
115 return VBases.get(Definition->getASTContext().getExternalSource());
118 CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
119 DeclContext *DC, SourceLocation StartLoc,
120 SourceLocation IdLoc, IdentifierInfo *Id,
121 CXXRecordDecl *PrevDecl)
122 : RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
123 DefinitionData(PrevDecl ? PrevDecl->DefinitionData
126 CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
127 DeclContext *DC, SourceLocation StartLoc,
128 SourceLocation IdLoc, IdentifierInfo *Id,
129 CXXRecordDecl *PrevDecl,
130 bool DelayTypeCreation) {
131 auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc, IdLoc, Id,
133 R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
135 // FIXME: DelayTypeCreation seems like such a hack
136 if (!DelayTypeCreation)
137 C.getTypeDeclType(R, PrevDecl);
142 CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
143 TypeSourceInfo *Info, SourceLocation Loc,
144 bool Dependent, bool IsGeneric,
145 LambdaCaptureDefault CaptureDefault) {
146 auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
148 R->setBeingDefined(true);
150 new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
152 R->setMayHaveOutOfDateDef(false);
153 R->setImplicit(true);
154 C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
159 CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
160 auto *R = new (C, ID) CXXRecordDecl(
161 CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
163 R->setMayHaveOutOfDateDef(false);
167 /// Determine whether a class has a repeated base class. This is intended for
168 /// use when determining if a class is standard-layout, so makes no attempt to
169 /// handle virtual bases.
170 static bool hasRepeatedBaseClass(const CXXRecordDecl *StartRD) {
171 llvm::SmallPtrSet<const CXXRecordDecl*, 8> SeenBaseTypes;
172 SmallVector<const CXXRecordDecl*, 8> WorkList = {StartRD};
173 while (!WorkList.empty()) {
174 const CXXRecordDecl *RD = WorkList.pop_back_val();
175 for (const CXXBaseSpecifier &BaseSpec : RD->bases()) {
176 if (const CXXRecordDecl *B = BaseSpec.getType()->getAsCXXRecordDecl()) {
177 if (!SeenBaseTypes.insert(B).second)
179 WorkList.push_back(B);
187 CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
189 ASTContext &C = getASTContext();
191 if (!data().Bases.isOffset() && data().NumBases > 0)
192 C.Deallocate(data().getBases());
195 if (!C.getLangOpts().CPlusPlus17) {
196 // C++ [dcl.init.aggr]p1:
197 // An aggregate is [...] a class with [...] no base classes [...].
198 data().Aggregate = false;
202 // A POD-struct is an aggregate class...
203 data().PlainOldData = false;
206 // The set of seen virtual base types.
207 llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
209 // The virtual bases of this class.
210 SmallVector<const CXXBaseSpecifier *, 8> VBases;
212 data().Bases = new(C) CXXBaseSpecifier [NumBases];
213 data().NumBases = NumBases;
214 for (unsigned i = 0; i < NumBases; ++i) {
215 data().getBases()[i] = *Bases[i];
216 // Keep track of inherited vbases for this base class.
217 const CXXBaseSpecifier *Base = Bases[i];
218 QualType BaseType = Base->getType();
219 // Skip dependent types; we can't do any checking on them now.
220 if (BaseType->isDependentType())
222 auto *BaseClassDecl =
223 cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());
226 // A standard-layout class is a class that:
228 // -- has all non-static data members and bit-fields in the class and
229 // its base classes first declared in the same class
230 if (BaseClassDecl->data().HasBasesWithFields ||
231 !BaseClassDecl->field_empty()) {
232 if (data().HasBasesWithFields)
233 // Two bases have members or bit-fields: not standard-layout.
234 data().IsStandardLayout = false;
235 data().HasBasesWithFields = true;
239 // A standard-layout class is a class that:
240 // -- [...] has [...] at most one base class with non-static data
242 if (BaseClassDecl->data().HasBasesWithNonStaticDataMembers ||
243 BaseClassDecl->hasDirectFields()) {
244 if (data().HasBasesWithNonStaticDataMembers)
245 data().IsCXX11StandardLayout = false;
246 data().HasBasesWithNonStaticDataMembers = true;
249 if (!BaseClassDecl->isEmpty()) {
250 // C++14 [meta.unary.prop]p4:
251 // T is a class type [...] with [...] no base class B for which
252 // is_empty<B>::value is false.
253 data().Empty = false;
256 // C++1z [dcl.init.agg]p1:
257 // An aggregate is a class with [...] no private or protected base classes
258 if (Base->getAccessSpecifier() != AS_public)
259 data().Aggregate = false;
261 // C++ [class.virtual]p1:
262 // A class that declares or inherits a virtual function is called a
263 // polymorphic class.
264 if (BaseClassDecl->isPolymorphic()) {
265 data().Polymorphic = true;
267 // An aggregate is a class with [...] no virtual functions.
268 data().Aggregate = false;
272 // A standard-layout class is a class that: [...]
273 // -- has no non-standard-layout base classes
274 if (!BaseClassDecl->isStandardLayout())
275 data().IsStandardLayout = false;
276 if (!BaseClassDecl->isCXX11StandardLayout())
277 data().IsCXX11StandardLayout = false;
279 // Record if this base is the first non-literal field or base.
280 if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
281 data().HasNonLiteralTypeFieldsOrBases = true;
283 // Now go through all virtual bases of this base and add them.
284 for (const auto &VBase : BaseClassDecl->vbases()) {
285 // Add this base if it's not already in the list.
286 if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
287 VBases.push_back(&VBase);
289 // C++11 [class.copy]p8:
290 // The implicitly-declared copy constructor for a class X will have
291 // the form 'X::X(const X&)' if each [...] virtual base class B of X
292 // has a copy constructor whose first parameter is of type
293 // 'const B&' or 'const volatile B&' [...]
294 if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
295 if (!VBaseDecl->hasCopyConstructorWithConstParam())
296 data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
298 // C++1z [dcl.init.agg]p1:
299 // An aggregate is a class with [...] no virtual base classes
300 data().Aggregate = false;
304 if (Base->isVirtual()) {
305 // Add this base if it's not already in the list.
306 if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
307 VBases.push_back(Base);
309 // C++14 [meta.unary.prop] is_empty:
310 // T is a class type, but not a union type, with ... no virtual base
312 data().Empty = false;
314 // C++1z [dcl.init.agg]p1:
315 // An aggregate is a class with [...] no virtual base classes
316 data().Aggregate = false;
318 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
319 // A [default constructor, copy/move constructor, or copy/move assignment
320 // operator for a class X] is trivial [...] if:
321 // -- class X has [...] no virtual base classes
322 data().HasTrivialSpecialMembers &= SMF_Destructor;
323 data().HasTrivialSpecialMembersForCall &= SMF_Destructor;
326 // A standard-layout class is a class that: [...]
327 // -- has [...] no virtual base classes
328 data().IsStandardLayout = false;
329 data().IsCXX11StandardLayout = false;
331 // C++20 [dcl.constexpr]p3:
332 // In the definition of a constexpr function [...]
333 // -- if the function is a constructor or destructor,
334 // its class shall not have any virtual base classes
335 data().DefaultedDefaultConstructorIsConstexpr = false;
336 data().DefaultedDestructorIsConstexpr = false;
338 // C++1z [class.copy]p8:
339 // The implicitly-declared copy constructor for a class X will have
340 // the form 'X::X(const X&)' if each potentially constructed subobject
341 // has a copy constructor whose first parameter is of type
342 // 'const B&' or 'const volatile B&' [...]
343 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
344 data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
346 // C++ [class.ctor]p5:
347 // A default constructor is trivial [...] if:
348 // -- all the direct base classes of its class have trivial default
350 if (!BaseClassDecl->hasTrivialDefaultConstructor())
351 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
353 // C++0x [class.copy]p13:
354 // A copy/move constructor for class X is trivial if [...]
356 // -- the constructor selected to copy/move each direct base class
357 // subobject is trivial, and
358 if (!BaseClassDecl->hasTrivialCopyConstructor())
359 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
361 if (!BaseClassDecl->hasTrivialCopyConstructorForCall())
362 data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;
364 // If the base class doesn't have a simple move constructor, we'll eagerly
365 // declare it and perform overload resolution to determine which function
366 // it actually calls. If it does have a simple move constructor, this
368 if (!BaseClassDecl->hasTrivialMoveConstructor())
369 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
371 if (!BaseClassDecl->hasTrivialMoveConstructorForCall())
372 data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;
374 // C++0x [class.copy]p27:
375 // A copy/move assignment operator for class X is trivial if [...]
377 // -- the assignment operator selected to copy/move each direct base
378 // class subobject is trivial, and
379 if (!BaseClassDecl->hasTrivialCopyAssignment())
380 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
381 // If the base class doesn't have a simple move assignment, we'll eagerly
382 // declare it and perform overload resolution to determine which function
383 // it actually calls. If it does have a simple move assignment, this
385 if (!BaseClassDecl->hasTrivialMoveAssignment())
386 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
388 // C++11 [class.ctor]p6:
389 // If that user-written default constructor would satisfy the
390 // requirements of a constexpr constructor, the implicitly-defined
391 // default constructor is constexpr.
392 if (!BaseClassDecl->hasConstexprDefaultConstructor())
393 data().DefaultedDefaultConstructorIsConstexpr = false;
395 // C++1z [class.copy]p8:
396 // The implicitly-declared copy constructor for a class X will have
397 // the form 'X::X(const X&)' if each potentially constructed subobject
398 // has a copy constructor whose first parameter is of type
399 // 'const B&' or 'const volatile B&' [...]
400 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
401 data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
404 // C++ [class.ctor]p3:
405 // A destructor is trivial if all the direct base classes of its class
406 // have trivial destructors.
407 if (!BaseClassDecl->hasTrivialDestructor())
408 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
410 if (!BaseClassDecl->hasTrivialDestructorForCall())
411 data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
413 if (!BaseClassDecl->hasIrrelevantDestructor())
414 data().HasIrrelevantDestructor = false;
416 // C++11 [class.copy]p18:
417 // The implicitly-declared copy assignment operator for a class X will
418 // have the form 'X& X::operator=(const X&)' if each direct base class B
419 // of X has a copy assignment operator whose parameter is of type 'const
420 // B&', 'const volatile B&', or 'B' [...]
421 if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
422 data().ImplicitCopyAssignmentHasConstParam = false;
424 // A class has an Objective-C object member if... or any of its bases
425 // has an Objective-C object member.
426 if (BaseClassDecl->hasObjectMember())
427 setHasObjectMember(true);
429 if (BaseClassDecl->hasVolatileMember())
430 setHasVolatileMember(true);
432 if (BaseClassDecl->getArgPassingRestrictions() ==
433 RecordDecl::APK_CanNeverPassInRegs)
434 setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
436 // Keep track of the presence of mutable fields.
437 if (BaseClassDecl->hasMutableFields()) {
438 data().HasMutableFields = true;
439 data().NeedOverloadResolutionForCopyConstructor = true;
442 if (BaseClassDecl->hasUninitializedReferenceMember())
443 data().HasUninitializedReferenceMember = true;
445 if (!BaseClassDecl->allowConstDefaultInit())
446 data().HasUninitializedFields = true;
448 addedClassSubobject(BaseClassDecl);
452 // A class S is a standard-layout class if it:
453 // -- has at most one base class subobject of any given type
455 // Note that we only need to check this for classes with more than one base
456 // class. If there's only one base class, and it's standard layout, then
457 // we know there are no repeated base classes.
458 if (data().IsStandardLayout && NumBases > 1 && hasRepeatedBaseClass(this))
459 data().IsStandardLayout = false;
461 if (VBases.empty()) {
462 data().IsParsingBaseSpecifiers = false;
466 // Create base specifier for any direct or indirect virtual bases.
467 data().VBases = new (C) CXXBaseSpecifier[VBases.size()];
468 data().NumVBases = VBases.size();
469 for (int I = 0, E = VBases.size(); I != E; ++I) {
470 QualType Type = VBases[I]->getType();
471 if (!Type->isDependentType())
472 addedClassSubobject(Type->getAsCXXRecordDecl());
473 data().getVBases()[I] = *VBases[I];
476 data().IsParsingBaseSpecifiers = false;
479 unsigned CXXRecordDecl::getODRHash() const {
480 assert(hasDefinition() && "ODRHash only for records with definitions");
482 // Previously calculated hash is stored in DefinitionData.
483 if (DefinitionData->HasODRHash)
484 return DefinitionData->ODRHash;
486 // Only calculate hash on first call of getODRHash per record.
488 Hash.AddCXXRecordDecl(getDefinition());
489 DefinitionData->HasODRHash = true;
490 DefinitionData->ODRHash = Hash.CalculateHash();
492 return DefinitionData->ODRHash;
495 void CXXRecordDecl::addedClassSubobject(CXXRecordDecl *Subobj) {
496 // C++11 [class.copy]p11:
497 // A defaulted copy/move constructor for a class X is defined as
499 // -- a direct or virtual base class B that cannot be copied/moved [...]
500 // -- a non-static data member of class type M (or array thereof)
501 // that cannot be copied or moved [...]
502 if (!Subobj->hasSimpleCopyConstructor())
503 data().NeedOverloadResolutionForCopyConstructor = true;
504 if (!Subobj->hasSimpleMoveConstructor())
505 data().NeedOverloadResolutionForMoveConstructor = true;
507 // C++11 [class.copy]p23:
508 // A defaulted copy/move assignment operator for a class X is defined as
510 // -- a direct or virtual base class B that cannot be copied/moved [...]
511 // -- a non-static data member of class type M (or array thereof)
512 // that cannot be copied or moved [...]
513 if (!Subobj->hasSimpleMoveAssignment())
514 data().NeedOverloadResolutionForMoveAssignment = true;
516 // C++11 [class.ctor]p5, C++11 [class.copy]p11, C++11 [class.dtor]p5:
517 // A defaulted [ctor or dtor] for a class X is defined as
519 // -- any direct or virtual base class [...] has a type with a destructor
520 // that is deleted or inaccessible from the defaulted [ctor or dtor].
521 // -- any non-static data member has a type with a destructor
522 // that is deleted or inaccessible from the defaulted [ctor or dtor].
523 if (!Subobj->hasSimpleDestructor()) {
524 data().NeedOverloadResolutionForCopyConstructor = true;
525 data().NeedOverloadResolutionForMoveConstructor = true;
526 data().NeedOverloadResolutionForDestructor = true;
529 // C++2a [dcl.constexpr]p4:
530 // The definition of a constexpr destructor [shall] satisfy the
531 // following requirement:
532 // -- for every subobject of class type or (possibly multi-dimensional)
533 // array thereof, that class type shall have a constexpr destructor
534 if (!Subobj->hasConstexprDestructor())
535 data().DefaultedDestructorIsConstexpr = false;
538 bool CXXRecordDecl::hasConstexprDestructor() const {
539 auto *Dtor = getDestructor();
540 return Dtor ? Dtor->isConstexpr() : defaultedDestructorIsConstexpr();
543 bool CXXRecordDecl::hasAnyDependentBases() const {
544 if (!isDependentContext())
547 return !forallBases([](const CXXRecordDecl *) { return true; });
550 bool CXXRecordDecl::isTriviallyCopyable() const {
552 // A trivially copyable class is a class that:
553 // -- has no non-trivial copy constructors,
554 if (hasNonTrivialCopyConstructor()) return false;
555 // -- has no non-trivial move constructors,
556 if (hasNonTrivialMoveConstructor()) return false;
557 // -- has no non-trivial copy assignment operators,
558 if (hasNonTrivialCopyAssignment()) return false;
559 // -- has no non-trivial move assignment operators, and
560 if (hasNonTrivialMoveAssignment()) return false;
561 // -- has a trivial destructor.
562 if (!hasTrivialDestructor()) return false;
567 void CXXRecordDecl::markedVirtualFunctionPure() {
568 // C++ [class.abstract]p2:
569 // A class is abstract if it has at least one pure virtual function.
570 data().Abstract = true;
573 bool CXXRecordDecl::hasSubobjectAtOffsetZeroOfEmptyBaseType(
574 ASTContext &Ctx, const CXXRecordDecl *XFirst) {
578 llvm::SmallPtrSet<const CXXRecordDecl*, 8> Bases;
579 llvm::SmallPtrSet<const CXXRecordDecl*, 8> M;
580 SmallVector<const CXXRecordDecl*, 8> WorkList;
582 // Visit a type that we have determined is an element of M(S).
583 auto Visit = [&](const CXXRecordDecl *RD) -> bool {
584 RD = RD->getCanonicalDecl();
587 // A class S is a standard-layout class if it [...] has no element of the
588 // set M(S) of types as a base class.
590 // If we find a subobject of an empty type, it might also be a base class,
591 // so we'll need to walk the base classes to check.
592 if (!RD->data().HasBasesWithFields) {
593 // Walk the bases the first time, stopping if we find the type. Build a
594 // set of them so we don't need to walk them again.
596 bool RDIsBase = !forallBases([&](const CXXRecordDecl *Base) -> bool {
597 Base = Base->getCanonicalDecl();
611 if (M.insert(RD).second)
612 WorkList.push_back(RD);
619 while (!WorkList.empty()) {
620 const CXXRecordDecl *X = WorkList.pop_back_val();
622 // FIXME: We don't check the bases of X. That matches the standard, but
623 // that sure looks like a wording bug.
625 // -- If X is a non-union class type with a non-static data member
626 // [recurse to each field] that is either of zero size or is the
627 // first non-static data member of X
628 // -- If X is a union type, [recurse to union members]
629 bool IsFirstField = true;
630 for (auto *FD : X->fields()) {
631 // FIXME: Should we really care about the type of the first non-static
632 // data member of a non-union if there are preceding unnamed bit-fields?
633 if (FD->isUnnamedBitfield())
636 if (!IsFirstField && !FD->isZeroSize(Ctx))
639 // -- If X is n array type, [visit the element type]
640 QualType T = Ctx.getBaseElementType(FD->getType());
641 if (auto *RD = T->getAsCXXRecordDecl())
646 IsFirstField = false;
653 bool CXXRecordDecl::lambdaIsDefaultConstructibleAndAssignable() const {
654 assert(isLambda() && "not a lambda");
656 // C++2a [expr.prim.lambda.capture]p11:
657 // The closure type associated with a lambda-expression has no default
658 // constructor if the lambda-expression has a lambda-capture and a
659 // defaulted default constructor otherwise. It has a deleted copy
660 // assignment operator if the lambda-expression has a lambda-capture and
661 // defaulted copy and move assignment operators otherwise.
663 // C++17 [expr.prim.lambda]p21:
664 // The closure type associated with a lambda-expression has no default
665 // constructor and a deleted copy assignment operator.
666 if (getLambdaCaptureDefault() != LCD_None ||
667 getLambdaData().NumCaptures != 0)
669 return getASTContext().getLangOpts().CPlusPlus2a;
672 void CXXRecordDecl::addedMember(Decl *D) {
673 if (!D->isImplicit() &&
674 !isa<FieldDecl>(D) &&
675 !isa<IndirectFieldDecl>(D) &&
676 (!isa<TagDecl>(D) || cast<TagDecl>(D)->getTagKind() == TTK_Class ||
677 cast<TagDecl>(D)->getTagKind() == TTK_Interface))
678 data().HasOnlyCMembers = false;
680 // Ignore friends and invalid declarations.
681 if (D->getFriendObjectKind() || D->isInvalidDecl())
684 auto *FunTmpl = dyn_cast<FunctionTemplateDecl>(D);
686 D = FunTmpl->getTemplatedDecl();
688 // FIXME: Pass NamedDecl* to addedMember?
689 Decl *DUnderlying = D;
690 if (auto *ND = dyn_cast<NamedDecl>(DUnderlying)) {
691 DUnderlying = ND->getUnderlyingDecl();
692 if (auto *UnderlyingFunTmpl = dyn_cast<FunctionTemplateDecl>(DUnderlying))
693 DUnderlying = UnderlyingFunTmpl->getTemplatedDecl();
696 if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) {
697 if (Method->isVirtual()) {
698 // C++ [dcl.init.aggr]p1:
699 // An aggregate is an array or a class with [...] no virtual functions.
700 data().Aggregate = false;
703 // A POD-struct is an aggregate class...
704 data().PlainOldData = false;
706 // C++14 [meta.unary.prop]p4:
707 // T is a class type [...] with [...] no virtual member functions...
708 data().Empty = false;
710 // C++ [class.virtual]p1:
711 // A class that declares or inherits a virtual function is called a
712 // polymorphic class.
713 data().Polymorphic = true;
715 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
716 // A [default constructor, copy/move constructor, or copy/move
717 // assignment operator for a class X] is trivial [...] if:
718 // -- class X has no virtual functions [...]
719 data().HasTrivialSpecialMembers &= SMF_Destructor;
720 data().HasTrivialSpecialMembersForCall &= SMF_Destructor;
723 // A standard-layout class is a class that: [...]
724 // -- has no virtual functions
725 data().IsStandardLayout = false;
726 data().IsCXX11StandardLayout = false;
730 // Notify the listener if an implicit member was added after the definition
732 if (!isBeingDefined() && D->isImplicit())
733 if (ASTMutationListener *L = getASTMutationListener())
734 L->AddedCXXImplicitMember(data().Definition, D);
736 // The kind of special member this declaration is, if any.
739 // Handle constructors.
740 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
741 if (Constructor->isInheritingConstructor()) {
742 // Ignore constructor shadow declarations. They are lazily created and
743 // so shouldn't affect any properties of the class.
745 if (!Constructor->isImplicit()) {
746 // Note that we have a user-declared constructor.
747 data().UserDeclaredConstructor = true;
750 // A POD-struct is an aggregate class [...]
751 // Since the POD bit is meant to be C++03 POD-ness, clear it even if
752 // the type is technically an aggregate in C++0x since it wouldn't be
754 data().PlainOldData = false;
757 if (Constructor->isDefaultConstructor()) {
758 SMKind |= SMF_DefaultConstructor;
760 if (Constructor->isUserProvided())
761 data().UserProvidedDefaultConstructor = true;
762 if (Constructor->isConstexpr())
763 data().HasConstexprDefaultConstructor = true;
764 if (Constructor->isDefaulted())
765 data().HasDefaultedDefaultConstructor = true;
770 if (Constructor->isCopyConstructor(Quals)) {
771 SMKind |= SMF_CopyConstructor;
773 if (Quals & Qualifiers::Const)
774 data().HasDeclaredCopyConstructorWithConstParam = true;
775 } else if (Constructor->isMoveConstructor())
776 SMKind |= SMF_MoveConstructor;
779 // C++11 [dcl.init.aggr]p1: DR1518
780 // An aggregate is an array or a class with no user-provided [or]
781 // explicit [...] constructors
782 // C++20 [dcl.init.aggr]p1:
783 // An aggregate is an array or a class with no user-declared [...]
785 if (getASTContext().getLangOpts().CPlusPlus2a
786 ? !Constructor->isImplicit()
787 : (Constructor->isUserProvided() || Constructor->isExplicit()))
788 data().Aggregate = false;
792 // Handle constructors, including those inherited from base classes.
793 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(DUnderlying)) {
794 // Record if we see any constexpr constructors which are neither copy
795 // nor move constructors.
796 // C++1z [basic.types]p10:
797 // [...] has at least one constexpr constructor or constructor template
798 // (possibly inherited from a base class) that is not a copy or move
800 if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
801 data().HasConstexprNonCopyMoveConstructor = true;
804 // Handle destructors.
805 if (const auto *DD = dyn_cast<CXXDestructorDecl>(D)) {
806 SMKind |= SMF_Destructor;
808 if (DD->isUserProvided())
809 data().HasIrrelevantDestructor = false;
810 // If the destructor is explicitly defaulted and not trivial or not public
811 // or if the destructor is deleted, we clear HasIrrelevantDestructor in
812 // finishedDefaultedOrDeletedMember.
814 // C++11 [class.dtor]p5:
815 // A destructor is trivial if [...] the destructor is not virtual.
816 if (DD->isVirtual()) {
817 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
818 data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
822 // Handle member functions.
823 if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) {
824 if (Method->isCopyAssignmentOperator()) {
825 SMKind |= SMF_CopyAssignment;
827 const auto *ParamTy =
828 Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
829 if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
830 data().HasDeclaredCopyAssignmentWithConstParam = true;
833 if (Method->isMoveAssignmentOperator())
834 SMKind |= SMF_MoveAssignment;
836 // Keep the list of conversion functions up-to-date.
837 if (auto *Conversion = dyn_cast<CXXConversionDecl>(D)) {
838 // FIXME: We use the 'unsafe' accessor for the access specifier here,
839 // because Sema may not have set it yet. That's really just a misdesign
840 // in Sema. However, LLDB *will* have set the access specifier correctly,
841 // and adds declarations after the class is technically completed,
842 // so completeDefinition()'s overriding of the access specifiers doesn't
844 AccessSpecifier AS = Conversion->getAccessUnsafe();
846 if (Conversion->getPrimaryTemplate()) {
847 // We don't record specializations.
849 ASTContext &Ctx = getASTContext();
850 ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
852 FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
853 if (Primary->getPreviousDecl())
854 Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
857 Conversions.addDecl(Ctx, Primary, AS);
862 // If this is the first declaration of a special member, we no longer have
863 // an implicit trivial special member.
864 data().HasTrivialSpecialMembers &=
865 data().DeclaredSpecialMembers | ~SMKind;
866 data().HasTrivialSpecialMembersForCall &=
867 data().DeclaredSpecialMembers | ~SMKind;
869 if (!Method->isImplicit() && !Method->isUserProvided()) {
870 // This method is user-declared but not user-provided. We can't work out
871 // whether it's trivial yet (not until we get to the end of the class).
872 // We'll handle this method in finishedDefaultedOrDeletedMember.
873 } else if (Method->isTrivial()) {
874 data().HasTrivialSpecialMembers |= SMKind;
875 data().HasTrivialSpecialMembersForCall |= SMKind;
876 } else if (Method->isTrivialForCall()) {
877 data().HasTrivialSpecialMembersForCall |= SMKind;
878 data().DeclaredNonTrivialSpecialMembers |= SMKind;
880 data().DeclaredNonTrivialSpecialMembers |= SMKind;
881 // If this is a user-provided function, do not set
882 // DeclaredNonTrivialSpecialMembersForCall here since we don't know
883 // yet whether the method would be considered non-trivial for the
884 // purpose of calls (attribute "trivial_abi" can be dropped from the
885 // class later, which can change the special method's triviality).
886 if (!Method->isUserProvided())
887 data().DeclaredNonTrivialSpecialMembersForCall |= SMKind;
890 // Note when we have declared a declared special member, and suppress the
891 // implicit declaration of this special member.
892 data().DeclaredSpecialMembers |= SMKind;
894 if (!Method->isImplicit()) {
895 data().UserDeclaredSpecialMembers |= SMKind;
898 // A POD-struct is an aggregate class that has [...] no user-defined
899 // copy assignment operator and no user-defined destructor.
901 // Since the POD bit is meant to be C++03 POD-ness, and in C++03,
902 // aggregates could not have any constructors, clear it even for an
903 // explicitly defaulted or deleted constructor.
904 // type is technically an aggregate in C++0x since it wouldn't be in 03.
906 // Also, a user-declared move assignment operator makes a class non-POD.
907 // This is an extension in C++03.
908 data().PlainOldData = false;
915 // Handle non-static data members.
916 if (const auto *Field = dyn_cast<FieldDecl>(D)) {
917 ASTContext &Context = getASTContext();
920 // A standard-layout class is a class that:
922 // -- has all non-static data members and bit-fields in the class and
923 // its base classes first declared in the same class
924 if (data().HasBasesWithFields)
925 data().IsStandardLayout = false;
927 // C++ [class.bit]p2:
928 // A declaration for a bit-field that omits the identifier declares an
929 // unnamed bit-field. Unnamed bit-fields are not members and cannot be
931 if (Field->isUnnamedBitfield()) {
932 // C++ [meta.unary.prop]p4: [LWG2358]
933 // T is a class type [...] with [...] no unnamed bit-fields of non-zero
935 if (data().Empty && !Field->isZeroLengthBitField(Context) &&
936 Context.getLangOpts().getClangABICompat() >
937 LangOptions::ClangABI::Ver6)
938 data().Empty = false;
943 // A standard-layout class is a class that:
944 // -- either has no non-static data members in the most derived class
945 // [...] or has no base classes with non-static data members
946 if (data().HasBasesWithNonStaticDataMembers)
947 data().IsCXX11StandardLayout = false;
949 // C++ [dcl.init.aggr]p1:
950 // An aggregate is an array or a class (clause 9) with [...] no
951 // private or protected non-static data members (clause 11).
953 // A POD must be an aggregate.
954 if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
955 data().Aggregate = false;
956 data().PlainOldData = false;
959 // Track whether this is the first field. We use this when checking
960 // whether the class is standard-layout below.
961 bool IsFirstField = !data().HasPrivateFields &&
962 !data().HasProtectedFields && !data().HasPublicFields;
965 // A standard-layout class is a class that:
967 // -- has the same access control for all non-static data members,
968 switch (D->getAccess()) {
969 case AS_private: data().HasPrivateFields = true; break;
970 case AS_protected: data().HasProtectedFields = true; break;
971 case AS_public: data().HasPublicFields = true; break;
972 case AS_none: llvm_unreachable("Invalid access specifier");
974 if ((data().HasPrivateFields + data().HasProtectedFields +
975 data().HasPublicFields) > 1) {
976 data().IsStandardLayout = false;
977 data().IsCXX11StandardLayout = false;
980 // Keep track of the presence of mutable fields.
981 if (Field->isMutable()) {
982 data().HasMutableFields = true;
983 data().NeedOverloadResolutionForCopyConstructor = true;
986 // C++11 [class.union]p8, DR1460:
987 // If X is a union, a non-static data member of X that is not an anonymous
988 // union is a variant member of X.
989 if (isUnion() && !Field->isAnonymousStructOrUnion())
990 data().HasVariantMembers = true;
993 // A POD struct is a class that is both a trivial class and a
994 // standard-layout class, and has no non-static data members of type
995 // non-POD struct, non-POD union (or array of such types).
997 // Automatic Reference Counting: the presence of a member of Objective-C pointer type
998 // that does not explicitly have no lifetime makes the class a non-POD.
999 QualType T = Context.getBaseElementType(Field->getType());
1000 if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
1001 if (T.hasNonTrivialObjCLifetime()) {
1002 // Objective-C Automatic Reference Counting:
1003 // If a class has a non-static data member of Objective-C pointer
1004 // type (or array thereof), it is a non-POD type and its
1005 // default constructor (if any), copy constructor, move constructor,
1006 // copy assignment operator, move assignment operator, and destructor are
1008 setHasObjectMember(true);
1009 struct DefinitionData &Data = data();
1010 Data.PlainOldData = false;
1011 Data.HasTrivialSpecialMembers = 0;
1013 // __strong or __weak fields do not make special functions non-trivial
1014 // for the purpose of calls.
1015 Qualifiers::ObjCLifetime LT = T.getQualifiers().getObjCLifetime();
1016 if (LT != Qualifiers::OCL_Strong && LT != Qualifiers::OCL_Weak)
1017 data().HasTrivialSpecialMembersForCall = 0;
1019 // Structs with __weak fields should never be passed directly.
1020 if (LT == Qualifiers::OCL_Weak)
1021 setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
1023 Data.HasIrrelevantDestructor = false;
1026 data().DefaultedCopyConstructorIsDeleted = true;
1027 data().DefaultedMoveConstructorIsDeleted = true;
1028 data().DefaultedMoveAssignmentIsDeleted = true;
1029 data().DefaultedDestructorIsDeleted = true;
1030 data().NeedOverloadResolutionForCopyConstructor = true;
1031 data().NeedOverloadResolutionForMoveConstructor = true;
1032 data().NeedOverloadResolutionForMoveAssignment = true;
1033 data().NeedOverloadResolutionForDestructor = true;
1035 } else if (!Context.getLangOpts().ObjCAutoRefCount) {
1036 setHasObjectMember(true);
1038 } else if (!T.isCXX98PODType(Context))
1039 data().PlainOldData = false;
1041 if (T->isReferenceType()) {
1042 if (!Field->hasInClassInitializer())
1043 data().HasUninitializedReferenceMember = true;
1046 // A standard-layout class is a class that:
1047 // -- has no non-static data members of type [...] reference,
1048 data().IsStandardLayout = false;
1049 data().IsCXX11StandardLayout = false;
1051 // C++1z [class.copy.ctor]p10:
1052 // A defaulted copy constructor for a class X is defined as deleted if X has:
1053 // -- a non-static data member of rvalue reference type
1054 if (T->isRValueReferenceType())
1055 data().DefaultedCopyConstructorIsDeleted = true;
1058 if (!Field->hasInClassInitializer() && !Field->isMutable()) {
1059 if (CXXRecordDecl *FieldType = T->getAsCXXRecordDecl()) {
1060 if (FieldType->hasDefinition() && !FieldType->allowConstDefaultInit())
1061 data().HasUninitializedFields = true;
1063 data().HasUninitializedFields = true;
1067 // Record if this field is the first non-literal or volatile field or base.
1068 if (!T->isLiteralType(Context) || T.isVolatileQualified())
1069 data().HasNonLiteralTypeFieldsOrBases = true;
1071 if (Field->hasInClassInitializer() ||
1072 (Field->isAnonymousStructOrUnion() &&
1073 Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
1074 data().HasInClassInitializer = true;
1077 // A default constructor is trivial if [...] no non-static data member
1078 // of its class has a brace-or-equal-initializer.
1079 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
1081 // C++11 [dcl.init.aggr]p1:
1082 // An aggregate is a [...] class with [...] no
1083 // brace-or-equal-initializers for non-static data members.
1085 // This rule was removed in C++14.
1086 if (!getASTContext().getLangOpts().CPlusPlus14)
1087 data().Aggregate = false;
1089 // C++11 [class]p10:
1090 // A POD struct is [...] a trivial class.
1091 data().PlainOldData = false;
1094 // C++11 [class.copy]p23:
1095 // A defaulted copy/move assignment operator for a class X is defined
1096 // as deleted if X has:
1097 // -- a non-static data member of reference type
1098 if (T->isReferenceType())
1099 data().DefaultedMoveAssignmentIsDeleted = true;
1101 // Bitfields of length 0 are also zero-sized, but we already bailed out for
1102 // those because they are always unnamed.
1103 bool IsZeroSize = Field->isZeroSize(Context);
1105 if (const auto *RecordTy = T->getAs<RecordType>()) {
1106 auto *FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
1107 if (FieldRec->getDefinition()) {
1108 addedClassSubobject(FieldRec);
1110 // We may need to perform overload resolution to determine whether a
1111 // field can be moved if it's const or volatile qualified.
1112 if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
1113 // We need to care about 'const' for the copy constructor because an
1114 // implicit copy constructor might be declared with a non-const
1116 data().NeedOverloadResolutionForCopyConstructor = true;
1117 data().NeedOverloadResolutionForMoveConstructor = true;
1118 data().NeedOverloadResolutionForMoveAssignment = true;
1121 // C++11 [class.ctor]p5, C++11 [class.copy]p11:
1122 // A defaulted [special member] for a class X is defined as
1124 // -- X is a union-like class that has a variant member with a
1125 // non-trivial [corresponding special member]
1127 if (FieldRec->hasNonTrivialCopyConstructor())
1128 data().DefaultedCopyConstructorIsDeleted = true;
1129 if (FieldRec->hasNonTrivialMoveConstructor())
1130 data().DefaultedMoveConstructorIsDeleted = true;
1131 if (FieldRec->hasNonTrivialMoveAssignment())
1132 data().DefaultedMoveAssignmentIsDeleted = true;
1133 if (FieldRec->hasNonTrivialDestructor())
1134 data().DefaultedDestructorIsDeleted = true;
1137 // For an anonymous union member, our overload resolution will perform
1138 // overload resolution for its members.
1139 if (Field->isAnonymousStructOrUnion()) {
1140 data().NeedOverloadResolutionForCopyConstructor |=
1141 FieldRec->data().NeedOverloadResolutionForCopyConstructor;
1142 data().NeedOverloadResolutionForMoveConstructor |=
1143 FieldRec->data().NeedOverloadResolutionForMoveConstructor;
1144 data().NeedOverloadResolutionForMoveAssignment |=
1145 FieldRec->data().NeedOverloadResolutionForMoveAssignment;
1146 data().NeedOverloadResolutionForDestructor |=
1147 FieldRec->data().NeedOverloadResolutionForDestructor;
1150 // C++0x [class.ctor]p5:
1151 // A default constructor is trivial [...] if:
1152 // -- for all the non-static data members of its class that are of
1153 // class type (or array thereof), each such class has a trivial
1154 // default constructor.
1155 if (!FieldRec->hasTrivialDefaultConstructor())
1156 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
1158 // C++0x [class.copy]p13:
1159 // A copy/move constructor for class X is trivial if [...]
1161 // -- for each non-static data member of X that is of class type (or
1162 // an array thereof), the constructor selected to copy/move that
1163 // member is trivial;
1164 if (!FieldRec->hasTrivialCopyConstructor())
1165 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
1167 if (!FieldRec->hasTrivialCopyConstructorForCall())
1168 data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;
1170 // If the field doesn't have a simple move constructor, we'll eagerly
1171 // declare the move constructor for this class and we'll decide whether
1172 // it's trivial then.
1173 if (!FieldRec->hasTrivialMoveConstructor())
1174 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
1176 if (!FieldRec->hasTrivialMoveConstructorForCall())
1177 data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;
1179 // C++0x [class.copy]p27:
1180 // A copy/move assignment operator for class X is trivial if [...]
1182 // -- for each non-static data member of X that is of class type (or
1183 // an array thereof), the assignment operator selected to
1184 // copy/move that member is trivial;
1185 if (!FieldRec->hasTrivialCopyAssignment())
1186 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
1187 // If the field doesn't have a simple move assignment, we'll eagerly
1188 // declare the move assignment for this class and we'll decide whether
1189 // it's trivial then.
1190 if (!FieldRec->hasTrivialMoveAssignment())
1191 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
1193 if (!FieldRec->hasTrivialDestructor())
1194 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
1195 if (!FieldRec->hasTrivialDestructorForCall())
1196 data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
1197 if (!FieldRec->hasIrrelevantDestructor())
1198 data().HasIrrelevantDestructor = false;
1199 if (FieldRec->hasObjectMember())
1200 setHasObjectMember(true);
1201 if (FieldRec->hasVolatileMember())
1202 setHasVolatileMember(true);
1203 if (FieldRec->getArgPassingRestrictions() ==
1204 RecordDecl::APK_CanNeverPassInRegs)
1205 setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
1208 // A standard-layout class is a class that:
1209 // -- has no non-static data members of type non-standard-layout
1210 // class (or array of such types) [...]
1211 if (!FieldRec->isStandardLayout())
1212 data().IsStandardLayout = false;
1213 if (!FieldRec->isCXX11StandardLayout())
1214 data().IsCXX11StandardLayout = false;
1217 // A standard-layout class is a class that:
1219 // -- has no element of the set M(S) of types as a base class.
1220 if (data().IsStandardLayout &&
1221 (isUnion() || IsFirstField || IsZeroSize) &&
1222 hasSubobjectAtOffsetZeroOfEmptyBaseType(Context, FieldRec))
1223 data().IsStandardLayout = false;
1226 // A standard-layout class is a class that:
1227 // -- has no base classes of the same type as the first non-static
1229 if (data().IsCXX11StandardLayout && IsFirstField) {
1230 // FIXME: We should check all base classes here, not just direct
1232 for (const auto &BI : bases()) {
1233 if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
1234 data().IsCXX11StandardLayout = false;
1240 // Keep track of the presence of mutable fields.
1241 if (FieldRec->hasMutableFields()) {
1242 data().HasMutableFields = true;
1243 data().NeedOverloadResolutionForCopyConstructor = true;
1246 // C++11 [class.copy]p13:
1247 // If the implicitly-defined constructor would satisfy the
1248 // requirements of a constexpr constructor, the implicitly-defined
1249 // constructor is constexpr.
1250 // C++11 [dcl.constexpr]p4:
1251 // -- every constructor involved in initializing non-static data
1252 // members [...] shall be a constexpr constructor
1253 if (!Field->hasInClassInitializer() &&
1254 !FieldRec->hasConstexprDefaultConstructor() && !isUnion())
1255 // The standard requires any in-class initializer to be a constant
1256 // expression. We consider this to be a defect.
1257 data().DefaultedDefaultConstructorIsConstexpr = false;
1259 // C++11 [class.copy]p8:
1260 // The implicitly-declared copy constructor for a class X will have
1261 // the form 'X::X(const X&)' if each potentially constructed subobject
1262 // of a class type M (or array thereof) has a copy constructor whose
1263 // first parameter is of type 'const M&' or 'const volatile M&'.
1264 if (!FieldRec->hasCopyConstructorWithConstParam())
1265 data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
1267 // C++11 [class.copy]p18:
1268 // The implicitly-declared copy assignment oeprator for a class X will
1269 // have the form 'X& X::operator=(const X&)' if [...] for all the
1270 // non-static data members of X that are of a class type M (or array
1271 // thereof), each such class type has a copy assignment operator whose
1272 // parameter is of type 'const M&', 'const volatile M&' or 'M'.
1273 if (!FieldRec->hasCopyAssignmentWithConstParam())
1274 data().ImplicitCopyAssignmentHasConstParam = false;
1276 if (FieldRec->hasUninitializedReferenceMember() &&
1277 !Field->hasInClassInitializer())
1278 data().HasUninitializedReferenceMember = true;
1280 // C++11 [class.union]p8, DR1460:
1281 // a non-static data member of an anonymous union that is a member of
1282 // X is also a variant member of X.
1283 if (FieldRec->hasVariantMembers() &&
1284 Field->isAnonymousStructOrUnion())
1285 data().HasVariantMembers = true;
1288 // Base element type of field is a non-class type.
1289 if (!T->isLiteralType(Context) ||
1290 (!Field->hasInClassInitializer() && !isUnion() &&
1291 !Context.getLangOpts().CPlusPlus2a))
1292 data().DefaultedDefaultConstructorIsConstexpr = false;
1294 // C++11 [class.copy]p23:
1295 // A defaulted copy/move assignment operator for a class X is defined
1296 // as deleted if X has:
1297 // -- a non-static data member of const non-class type (or array
1299 if (T.isConstQualified())
1300 data().DefaultedMoveAssignmentIsDeleted = true;
1303 // C++14 [meta.unary.prop]p4:
1304 // T is a class type [...] with [...] no non-static data members other
1305 // than subobjects of zero size
1306 if (data().Empty && !IsZeroSize)
1307 data().Empty = false;
1310 // Handle using declarations of conversion functions.
1311 if (auto *Shadow = dyn_cast<UsingShadowDecl>(D)) {
1312 if (Shadow->getDeclName().getNameKind()
1313 == DeclarationName::CXXConversionFunctionName) {
1314 ASTContext &Ctx = getASTContext();
1315 data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
1319 if (const auto *Using = dyn_cast<UsingDecl>(D)) {
1320 if (Using->getDeclName().getNameKind() ==
1321 DeclarationName::CXXConstructorName) {
1322 data().HasInheritedConstructor = true;
1323 // C++1z [dcl.init.aggr]p1:
1324 // An aggregate is [...] a class [...] with no inherited constructors
1325 data().Aggregate = false;
1328 if (Using->getDeclName().getCXXOverloadedOperator() == OO_Equal)
1329 data().HasInheritedAssignment = true;
1333 void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
1334 assert(!D->isImplicit() && !D->isUserProvided());
1336 // The kind of special member this declaration is, if any.
1337 unsigned SMKind = 0;
1339 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1340 if (Constructor->isDefaultConstructor()) {
1341 SMKind |= SMF_DefaultConstructor;
1342 if (Constructor->isConstexpr())
1343 data().HasConstexprDefaultConstructor = true;
1345 if (Constructor->isCopyConstructor())
1346 SMKind |= SMF_CopyConstructor;
1347 else if (Constructor->isMoveConstructor())
1348 SMKind |= SMF_MoveConstructor;
1349 else if (Constructor->isConstexpr())
1350 // We may now know that the constructor is constexpr.
1351 data().HasConstexprNonCopyMoveConstructor = true;
1352 } else if (isa<CXXDestructorDecl>(D)) {
1353 SMKind |= SMF_Destructor;
1354 if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
1355 data().HasIrrelevantDestructor = false;
1356 } else if (D->isCopyAssignmentOperator())
1357 SMKind |= SMF_CopyAssignment;
1358 else if (D->isMoveAssignmentOperator())
1359 SMKind |= SMF_MoveAssignment;
1361 // Update which trivial / non-trivial special members we have.
1362 // addedMember will have skipped this step for this member.
1364 data().HasTrivialSpecialMembers |= SMKind;
1366 data().DeclaredNonTrivialSpecialMembers |= SMKind;
1369 void CXXRecordDecl::setTrivialForCallFlags(CXXMethodDecl *D) {
1370 unsigned SMKind = 0;
1372 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1373 if (Constructor->isCopyConstructor())
1374 SMKind = SMF_CopyConstructor;
1375 else if (Constructor->isMoveConstructor())
1376 SMKind = SMF_MoveConstructor;
1377 } else if (isa<CXXDestructorDecl>(D))
1378 SMKind = SMF_Destructor;
1380 if (D->isTrivialForCall())
1381 data().HasTrivialSpecialMembersForCall |= SMKind;
1383 data().DeclaredNonTrivialSpecialMembersForCall |= SMKind;
1386 bool CXXRecordDecl::isCLike() const {
1387 if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
1388 !TemplateOrInstantiation.isNull())
1390 if (!hasDefinition())
1393 return isPOD() && data().HasOnlyCMembers;
1396 bool CXXRecordDecl::isGenericLambda() const {
1397 if (!isLambda()) return false;
1398 return getLambdaData().IsGenericLambda;
1402 static bool allLookupResultsAreTheSame(const DeclContext::lookup_result &R) {
1404 if (!declaresSameEntity(D, R.front()))
1410 static NamedDecl* getLambdaCallOperatorHelper(const CXXRecordDecl &RD) {
1411 if (!RD.isLambda()) return nullptr;
1412 DeclarationName Name =
1413 RD.getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
1414 DeclContext::lookup_result Calls = RD.lookup(Name);
1416 assert(!Calls.empty() && "Missing lambda call operator!");
1417 assert(allLookupResultsAreTheSame(Calls) &&
1418 "More than one lambda call operator!");
1419 return Calls.front();
1422 FunctionTemplateDecl* CXXRecordDecl::getDependentLambdaCallOperator() const {
1423 NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
1424 return dyn_cast_or_null<FunctionTemplateDecl>(CallOp);
1427 CXXMethodDecl *CXXRecordDecl::getLambdaCallOperator() const {
1428 NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
1430 if (CallOp == nullptr)
1433 if (const auto *CallOpTmpl = dyn_cast<FunctionTemplateDecl>(CallOp))
1434 return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
1436 return cast<CXXMethodDecl>(CallOp);
1439 CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
1440 if (!isLambda()) return nullptr;
1441 DeclarationName Name =
1442 &getASTContext().Idents.get(getLambdaStaticInvokerName());
1443 DeclContext::lookup_result Invoker = lookup(Name);
1444 if (Invoker.empty()) return nullptr;
1445 assert(allLookupResultsAreTheSame(Invoker) &&
1446 "More than one static invoker operator!");
1447 NamedDecl *InvokerFun = Invoker.front();
1448 if (const auto *InvokerTemplate = dyn_cast<FunctionTemplateDecl>(InvokerFun))
1449 return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
1451 return cast<CXXMethodDecl>(InvokerFun);
1454 void CXXRecordDecl::getCaptureFields(
1455 llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1456 FieldDecl *&ThisCapture) const {
1458 ThisCapture = nullptr;
1460 LambdaDefinitionData &Lambda = getLambdaData();
1461 RecordDecl::field_iterator Field = field_begin();
1462 for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
1463 C != CEnd; ++C, ++Field) {
1464 if (C->capturesThis())
1465 ThisCapture = *Field;
1466 else if (C->capturesVariable())
1467 Captures[C->getCapturedVar()] = *Field;
1469 assert(Field == field_end());
1472 TemplateParameterList *
1473 CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
1474 if (!isGenericLambda()) return nullptr;
1475 CXXMethodDecl *CallOp = getLambdaCallOperator();
1476 if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
1477 return Tmpl->getTemplateParameters();
1481 ArrayRef<NamedDecl *>
1482 CXXRecordDecl::getLambdaExplicitTemplateParameters() const {
1483 TemplateParameterList *List = getGenericLambdaTemplateParameterList();
1487 assert(std::is_partitioned(List->begin(), List->end(),
1488 [](const NamedDecl *D) { return !D->isImplicit(); })
1489 && "Explicit template params should be ordered before implicit ones");
1491 const auto ExplicitEnd = llvm::partition_point(
1492 *List, [](const NamedDecl *D) { return !D->isImplicit(); });
1493 return llvm::makeArrayRef(List->begin(), ExplicitEnd);
1496 Decl *CXXRecordDecl::getLambdaContextDecl() const {
1497 assert(isLambda() && "Not a lambda closure type!");
1498 ExternalASTSource *Source = getParentASTContext().getExternalSource();
1499 return getLambdaData().ContextDecl.get(Source);
1502 static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
1504 cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
1505 ->getConversionType();
1506 return Context.getCanonicalType(T);
1509 /// Collect the visible conversions of a base class.
1511 /// \param Record a base class of the class we're considering
1512 /// \param InVirtual whether this base class is a virtual base (or a base
1513 /// of a virtual base)
1514 /// \param Access the access along the inheritance path to this base
1515 /// \param ParentHiddenTypes the conversions provided by the inheritors
1517 /// \param Output the set to which to add conversions from non-virtual bases
1518 /// \param VOutput the set to which to add conversions from virtual bases
1519 /// \param HiddenVBaseCs the set of conversions which were hidden in a
1520 /// virtual base along some inheritance path
1521 static void CollectVisibleConversions(
1522 ASTContext &Context, const CXXRecordDecl *Record, bool InVirtual,
1523 AccessSpecifier Access,
1524 const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
1525 ASTUnresolvedSet &Output, UnresolvedSetImpl &VOutput,
1526 llvm::SmallPtrSet<NamedDecl *, 8> &HiddenVBaseCs) {
1527 // The set of types which have conversions in this class or its
1528 // subclasses. As an optimization, we don't copy the derived set
1529 // unless it might change.
1530 const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
1531 llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
1533 // Collect the direct conversions and figure out which conversions
1534 // will be hidden in the subclasses.
1535 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1536 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1537 if (ConvI != ConvE) {
1538 HiddenTypesBuffer = ParentHiddenTypes;
1539 HiddenTypes = &HiddenTypesBuffer;
1541 for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
1542 CanQualType ConvType(GetConversionType(Context, I.getDecl()));
1543 bool Hidden = ParentHiddenTypes.count(ConvType);
1545 HiddenTypesBuffer.insert(ConvType);
1547 // If this conversion is hidden and we're in a virtual base,
1548 // remember that it's hidden along some inheritance path.
1549 if (Hidden && InVirtual)
1550 HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
1552 // If this conversion isn't hidden, add it to the appropriate output.
1554 AccessSpecifier IAccess
1555 = CXXRecordDecl::MergeAccess(Access, I.getAccess());
1558 VOutput.addDecl(I.getDecl(), IAccess);
1560 Output.addDecl(Context, I.getDecl(), IAccess);
1565 // Collect information recursively from any base classes.
1566 for (const auto &I : Record->bases()) {
1567 const auto *RT = I.getType()->getAs<RecordType>();
1570 AccessSpecifier BaseAccess
1571 = CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
1572 bool BaseInVirtual = InVirtual || I.isVirtual();
1574 auto *Base = cast<CXXRecordDecl>(RT->getDecl());
1575 CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
1576 *HiddenTypes, Output, VOutput, HiddenVBaseCs);
1580 /// Collect the visible conversions of a class.
1582 /// This would be extremely straightforward if it weren't for virtual
1583 /// bases. It might be worth special-casing that, really.
1584 static void CollectVisibleConversions(ASTContext &Context,
1585 const CXXRecordDecl *Record,
1586 ASTUnresolvedSet &Output) {
1587 // The collection of all conversions in virtual bases that we've
1588 // found. These will be added to the output as long as they don't
1589 // appear in the hidden-conversions set.
1590 UnresolvedSet<8> VBaseCs;
1592 // The set of conversions in virtual bases that we've determined to
1594 llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
1596 // The set of types hidden by classes derived from this one.
1597 llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
1599 // Go ahead and collect the direct conversions and add them to the
1600 // hidden-types set.
1601 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1602 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1603 Output.append(Context, ConvI, ConvE);
1604 for (; ConvI != ConvE; ++ConvI)
1605 HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
1607 // Recursively collect conversions from base classes.
1608 for (const auto &I : Record->bases()) {
1609 const auto *RT = I.getType()->getAs<RecordType>();
1612 CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
1613 I.isVirtual(), I.getAccessSpecifier(),
1614 HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
1617 // Add any unhidden conversions provided by virtual bases.
1618 for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
1620 if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
1621 Output.addDecl(Context, I.getDecl(), I.getAccess());
1625 /// getVisibleConversionFunctions - get all conversion functions visible
1626 /// in current class; including conversion function templates.
1627 llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1628 CXXRecordDecl::getVisibleConversionFunctions() const {
1629 ASTContext &Ctx = getASTContext();
1631 ASTUnresolvedSet *Set;
1632 if (bases_begin() == bases_end()) {
1633 // If root class, all conversions are visible.
1634 Set = &data().Conversions.get(Ctx);
1636 Set = &data().VisibleConversions.get(Ctx);
1637 // If visible conversion list is not evaluated, evaluate it.
1638 if (!data().ComputedVisibleConversions) {
1639 CollectVisibleConversions(Ctx, this, *Set);
1640 data().ComputedVisibleConversions = true;
1643 return llvm::make_range(Set->begin(), Set->end());
1646 void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
1647 // This operation is O(N) but extremely rare. Sema only uses it to
1648 // remove UsingShadowDecls in a class that were followed by a direct
1649 // declaration, e.g.:
1651 // using B::operator int;
1654 // This is uncommon by itself and even more uncommon in conjunction
1655 // with sufficiently large numbers of directly-declared conversions
1656 // that asymptotic behavior matters.
1658 ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
1659 for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
1660 if (Convs[I].getDecl() == ConvDecl) {
1662 assert(llvm::find(Convs, ConvDecl) == Convs.end() &&
1663 "conversion was found multiple times in unresolved set");
1668 llvm_unreachable("conversion not found in set!");
1671 CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
1672 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1673 return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
1678 MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
1679 return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1683 CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
1684 TemplateSpecializationKind TSK) {
1685 assert(TemplateOrInstantiation.isNull() &&
1686 "Previous template or instantiation?");
1687 assert(!isa<ClassTemplatePartialSpecializationDecl>(this));
1688 TemplateOrInstantiation
1689 = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1692 ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
1693 return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1696 void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
1697 TemplateOrInstantiation = Template;
1700 TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
1701 if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this))
1702 return Spec->getSpecializationKind();
1704 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1705 return MSInfo->getTemplateSpecializationKind();
1707 return TSK_Undeclared;
1711 CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
1712 if (auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1713 Spec->setSpecializationKind(TSK);
1717 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1718 MSInfo->setTemplateSpecializationKind(TSK);
1722 llvm_unreachable("Not a class template or member class specialization");
1725 const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
1726 auto GetDefinitionOrSelf =
1727 [](const CXXRecordDecl *D) -> const CXXRecordDecl * {
1728 if (auto *Def = D->getDefinition())
1733 // If it's a class template specialization, find the template or partial
1734 // specialization from which it was instantiated.
1735 if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1736 auto From = TD->getInstantiatedFrom();
1737 if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
1738 while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
1739 if (NewCTD->isMemberSpecialization())
1743 return GetDefinitionOrSelf(CTD->getTemplatedDecl());
1746 From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
1747 while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
1748 if (NewCTPSD->isMemberSpecialization())
1752 return GetDefinitionOrSelf(CTPSD);
1756 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1757 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
1758 const CXXRecordDecl *RD = this;
1759 while (auto *NewRD = RD->getInstantiatedFromMemberClass())
1761 return GetDefinitionOrSelf(RD);
1765 assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&
1766 "couldn't find pattern for class template instantiation");
1770 CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
1771 ASTContext &Context = getASTContext();
1772 QualType ClassType = Context.getTypeDeclType(this);
1774 DeclarationName Name
1775 = Context.DeclarationNames.getCXXDestructorName(
1776 Context.getCanonicalType(ClassType));
1778 DeclContext::lookup_result R = lookup(Name);
1780 return R.empty() ? nullptr : dyn_cast<CXXDestructorDecl>(R.front());
1783 bool CXXRecordDecl::isAnyDestructorNoReturn() const {
1784 // Destructor is noreturn.
1785 if (const CXXDestructorDecl *Destructor = getDestructor())
1786 if (Destructor->isNoReturn())
1789 // Check base classes destructor for noreturn.
1790 for (const auto &Base : bases())
1791 if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl())
1792 if (RD->isAnyDestructorNoReturn())
1795 // Check fields for noreturn.
1796 for (const auto *Field : fields())
1797 if (const CXXRecordDecl *RD =
1798 Field->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl())
1799 if (RD->isAnyDestructorNoReturn())
1802 // All destructors are not noreturn.
1806 static bool isDeclContextInNamespace(const DeclContext *DC) {
1807 while (!DC->isTranslationUnit()) {
1808 if (DC->isNamespace())
1810 DC = DC->getParent();
1815 bool CXXRecordDecl::isInterfaceLike() const {
1816 assert(hasDefinition() && "checking for interface-like without a definition");
1817 // All __interfaces are inheritently interface-like.
1821 // Interface-like types cannot have a user declared constructor, destructor,
1822 // friends, VBases, conversion functions, or fields. Additionally, lambdas
1823 // cannot be interface types.
1824 if (isLambda() || hasUserDeclaredConstructor() ||
1825 hasUserDeclaredDestructor() || !field_empty() || hasFriends() ||
1826 getNumVBases() > 0 || conversion_end() - conversion_begin() > 0)
1829 // No interface-like type can have a method with a definition.
1830 for (const auto *const Method : methods())
1831 if (Method->isDefined() && !Method->isImplicit())
1834 // Check "Special" types.
1835 const auto *Uuid = getAttr<UuidAttr>();
1836 // MS SDK declares IUnknown/IDispatch both in the root of a TU, or in an
1837 // extern C++ block directly in the TU. These are only valid if in one
1838 // of these two situations.
1839 if (Uuid && isStruct() && !getDeclContext()->isExternCContext() &&
1840 !isDeclContextInNamespace(getDeclContext()) &&
1841 ((getName() == "IUnknown" &&
1842 Uuid->getGuid() == "00000000-0000-0000-C000-000000000046") ||
1843 (getName() == "IDispatch" &&
1844 Uuid->getGuid() == "00020400-0000-0000-C000-000000000046"))) {
1845 if (getNumBases() > 0)
1850 // FIXME: Any access specifiers is supposed to make this no longer interface
1853 // If this isn't a 'special' type, it must have a single interface-like base.
1854 if (getNumBases() != 1)
1857 const auto BaseSpec = *bases_begin();
1858 if (BaseSpec.isVirtual() || BaseSpec.getAccessSpecifier() != AS_public)
1860 const auto *Base = BaseSpec.getType()->getAsCXXRecordDecl();
1861 if (Base->isInterface() || !Base->isInterfaceLike())
1866 void CXXRecordDecl::completeDefinition() {
1867 completeDefinition(nullptr);
1870 void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
1871 RecordDecl::completeDefinition();
1873 // If the class may be abstract (but hasn't been marked as such), check for
1874 // any pure final overriders.
1875 if (mayBeAbstract()) {
1876 CXXFinalOverriderMap MyFinalOverriders;
1877 if (!FinalOverriders) {
1878 getFinalOverriders(MyFinalOverriders);
1879 FinalOverriders = &MyFinalOverriders;
1883 for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
1884 MEnd = FinalOverriders->end();
1885 M != MEnd && !Done; ++M) {
1886 for (OverridingMethods::iterator SO = M->second.begin(),
1887 SOEnd = M->second.end();
1888 SO != SOEnd && !Done; ++SO) {
1889 assert(SO->second.size() > 0 &&
1890 "All virtual functions have overriding virtual functions");
1892 // C++ [class.abstract]p4:
1893 // A class is abstract if it contains or inherits at least one
1894 // pure virtual function for which the final overrider is pure
1896 if (SO->second.front().Method->isPure()) {
1897 data().Abstract = true;
1905 // Set access bits correctly on the directly-declared conversions.
1906 for (conversion_iterator I = conversion_begin(), E = conversion_end();
1908 I.setAccess((*I)->getAccess());
1911 bool CXXRecordDecl::mayBeAbstract() const {
1912 if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
1913 isDependentContext())
1916 for (const auto &B : bases()) {
1917 const auto *BaseDecl =
1918 cast<CXXRecordDecl>(B.getType()->castAs<RecordType>()->getDecl());
1919 if (BaseDecl->isAbstract())
1926 void CXXDeductionGuideDecl::anchor() {}
1928 bool ExplicitSpecifier::isEquivalent(const ExplicitSpecifier Other) const {
1929 if ((getKind() != Other.getKind() ||
1930 getKind() == ExplicitSpecKind::Unresolved)) {
1931 if (getKind() == ExplicitSpecKind::Unresolved &&
1932 Other.getKind() == ExplicitSpecKind::Unresolved) {
1933 ODRHash SelfHash, OtherHash;
1934 SelfHash.AddStmt(getExpr());
1935 OtherHash.AddStmt(Other.getExpr());
1936 return SelfHash.CalculateHash() == OtherHash.CalculateHash();
1943 ExplicitSpecifier ExplicitSpecifier::getFromDecl(FunctionDecl *Function) {
1944 switch (Function->getDeclKind()) {
1945 case Decl::Kind::CXXConstructor:
1946 return cast<CXXConstructorDecl>(Function)->getExplicitSpecifier();
1947 case Decl::Kind::CXXConversion:
1948 return cast<CXXConversionDecl>(Function)->getExplicitSpecifier();
1949 case Decl::Kind::CXXDeductionGuide:
1950 return cast<CXXDeductionGuideDecl>(Function)->getExplicitSpecifier();
1956 CXXDeductionGuideDecl *CXXDeductionGuideDecl::Create(
1957 ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
1958 ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T,
1959 TypeSourceInfo *TInfo, SourceLocation EndLocation) {
1960 return new (C, DC) CXXDeductionGuideDecl(C, DC, StartLoc, ES, NameInfo, T,
1961 TInfo, EndLocation);
1964 CXXDeductionGuideDecl *CXXDeductionGuideDecl::CreateDeserialized(ASTContext &C,
1966 return new (C, ID) CXXDeductionGuideDecl(
1967 C, nullptr, SourceLocation(), ExplicitSpecifier(), DeclarationNameInfo(),
1968 QualType(), nullptr, SourceLocation());
1971 RequiresExprBodyDecl *RequiresExprBodyDecl::Create(
1972 ASTContext &C, DeclContext *DC, SourceLocation StartLoc) {
1973 return new (C, DC) RequiresExprBodyDecl(C, DC, StartLoc);
1976 RequiresExprBodyDecl *RequiresExprBodyDecl::CreateDeserialized(ASTContext &C,
1978 return new (C, ID) RequiresExprBodyDecl(C, nullptr, SourceLocation());
1981 void CXXMethodDecl::anchor() {}
1983 bool CXXMethodDecl::isStatic() const {
1984 const CXXMethodDecl *MD = getCanonicalDecl();
1986 if (MD->getStorageClass() == SC_Static)
1989 OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
1990 return isStaticOverloadedOperator(OOK);
1993 static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
1994 const CXXMethodDecl *BaseMD) {
1995 for (const CXXMethodDecl *MD : DerivedMD->overridden_methods()) {
1996 if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
1998 if (recursivelyOverrides(MD, BaseMD))
2005 CXXMethodDecl::getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
2007 if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
2010 // Lookup doesn't work for destructors, so handle them separately.
2011 if (isa<CXXDestructorDecl>(this)) {
2012 CXXMethodDecl *MD = RD->getDestructor();
2014 if (recursivelyOverrides(MD, this))
2016 if (MayBeBase && recursivelyOverrides(this, MD))
2022 for (auto *ND : RD->lookup(getDeclName())) {
2023 auto *MD = dyn_cast<CXXMethodDecl>(ND);
2026 if (recursivelyOverrides(MD, this))
2028 if (MayBeBase && recursivelyOverrides(this, MD))
2036 CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
2038 if (auto *MD = getCorrespondingMethodDeclaredInClass(RD, MayBeBase))
2041 for (const auto &I : RD->bases()) {
2042 const RecordType *RT = I.getType()->getAs<RecordType>();
2045 const auto *Base = cast<CXXRecordDecl>(RT->getDecl());
2046 CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
2054 CXXMethodDecl *CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2055 SourceLocation StartLoc,
2056 const DeclarationNameInfo &NameInfo,
2057 QualType T, TypeSourceInfo *TInfo,
2058 StorageClass SC, bool isInline,
2059 ConstexprSpecKind ConstexprKind,
2060 SourceLocation EndLocation,
2061 Expr *TrailingRequiresClause) {
2063 CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo, T, TInfo, SC,
2064 isInline, ConstexprKind, EndLocation,
2065 TrailingRequiresClause);
2068 CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2069 return new (C, ID) CXXMethodDecl(
2070 CXXMethod, C, nullptr, SourceLocation(), DeclarationNameInfo(),
2071 QualType(), nullptr, SC_None, false, CSK_unspecified, SourceLocation(),
2075 CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
2077 assert(isVirtual() && "this method is expected to be virtual");
2079 // When building with -fapple-kext, all calls must go through the vtable since
2080 // the kernel linker can do runtime patching of vtables.
2084 // If the member function is marked 'final', we know that it can't be
2085 // overridden and can therefore devirtualize it unless it's pure virtual.
2086 if (hasAttr<FinalAttr>())
2087 return isPure() ? nullptr : this;
2089 // If Base is unknown, we cannot devirtualize.
2093 // If the base expression (after skipping derived-to-base conversions) is a
2094 // class prvalue, then we can devirtualize.
2095 Base = Base->getBestDynamicClassTypeExpr();
2096 if (Base->isRValue() && Base->getType()->isRecordType())
2099 // If we don't even know what we would call, we can't devirtualize.
2100 const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType();
2101 if (!BestDynamicDecl)
2104 // There may be a method corresponding to MD in a derived class.
2105 CXXMethodDecl *DevirtualizedMethod =
2106 getCorrespondingMethodInClass(BestDynamicDecl);
2108 // If that method is pure virtual, we can't devirtualize. If this code is
2109 // reached, the result would be UB, not a direct call to the derived class
2110 // function, and we can't assume the derived class function is defined.
2111 if (DevirtualizedMethod->isPure())
2114 // If that method is marked final, we can devirtualize it.
2115 if (DevirtualizedMethod->hasAttr<FinalAttr>())
2116 return DevirtualizedMethod;
2118 // Similarly, if the class itself or its destructor is marked 'final',
2119 // the class can't be derived from and we can therefore devirtualize the
2120 // member function call.
2121 if (BestDynamicDecl->hasAttr<FinalAttr>())
2122 return DevirtualizedMethod;
2123 if (const auto *dtor = BestDynamicDecl->getDestructor()) {
2124 if (dtor->hasAttr<FinalAttr>())
2125 return DevirtualizedMethod;
2128 if (const auto *DRE = dyn_cast<DeclRefExpr>(Base)) {
2129 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
2130 if (VD->getType()->isRecordType())
2131 // This is a record decl. We know the type and can devirtualize it.
2132 return DevirtualizedMethod;
2137 // We can devirtualize calls on an object accessed by a class member access
2138 // expression, since by C++11 [basic.life]p6 we know that it can't refer to
2139 // a derived class object constructed in the same location.
2140 if (const auto *ME = dyn_cast<MemberExpr>(Base)) {
2141 const ValueDecl *VD = ME->getMemberDecl();
2142 return VD->getType()->isRecordType() ? DevirtualizedMethod : nullptr;
2145 // Likewise for calls on an object accessed by a (non-reference) pointer to
2147 if (auto *BO = dyn_cast<BinaryOperator>(Base)) {
2148 if (BO->isPtrMemOp()) {
2149 auto *MPT = BO->getRHS()->getType()->castAs<MemberPointerType>();
2150 if (MPT->getPointeeType()->isRecordType())
2151 return DevirtualizedMethod;
2155 // We can't devirtualize the call.
2159 bool CXXMethodDecl::isUsualDeallocationFunction(
2160 SmallVectorImpl<const FunctionDecl *> &PreventedBy) const {
2161 assert(PreventedBy.empty() && "PreventedBy is expected to be empty");
2162 if (getOverloadedOperator() != OO_Delete &&
2163 getOverloadedOperator() != OO_Array_Delete)
2166 // C++ [basic.stc.dynamic.deallocation]p2:
2167 // A template instance is never a usual deallocation function,
2168 // regardless of its signature.
2169 if (getPrimaryTemplate())
2172 // C++ [basic.stc.dynamic.deallocation]p2:
2173 // If a class T has a member deallocation function named operator delete
2174 // with exactly one parameter, then that function is a usual (non-placement)
2175 // deallocation function. [...]
2176 if (getNumParams() == 1)
2178 unsigned UsualParams = 1;
2181 // A destroying operator delete is a usual deallocation function if
2182 // removing the std::destroying_delete_t parameter and changing the
2183 // first parameter type from T* to void* results in the signature of
2184 // a usual deallocation function.
2185 if (isDestroyingOperatorDelete())
2188 // C++ <=14 [basic.stc.dynamic.deallocation]p2:
2189 // [...] If class T does not declare such an operator delete but does
2190 // declare a member deallocation function named operator delete with
2191 // exactly two parameters, the second of which has type std::size_t (18.1),
2192 // then this function is a usual deallocation function.
2194 // C++17 says a usual deallocation function is one with the signature
2195 // (void* [, size_t] [, std::align_val_t] [, ...])
2196 // and all such functions are usual deallocation functions. It's not clear
2197 // that allowing varargs functions was intentional.
2198 ASTContext &Context = getASTContext();
2199 if (UsualParams < getNumParams() &&
2200 Context.hasSameUnqualifiedType(getParamDecl(UsualParams)->getType(),
2201 Context.getSizeType()))
2204 if (UsualParams < getNumParams() &&
2205 getParamDecl(UsualParams)->getType()->isAlignValT())
2208 if (UsualParams != getNumParams())
2211 // In C++17 onwards, all potential usual deallocation functions are actual
2212 // usual deallocation functions. Honor this behavior when post-C++14
2213 // deallocation functions are offered as extensions too.
2214 // FIXME(EricWF): Destrying Delete should be a language option. How do we
2215 // handle when destroying delete is used prior to C++17?
2216 if (Context.getLangOpts().CPlusPlus17 ||
2217 Context.getLangOpts().AlignedAllocation ||
2218 isDestroyingOperatorDelete())
2221 // This function is a usual deallocation function if there are no
2222 // single-parameter deallocation functions of the same kind.
2223 DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
2225 for (const auto *D : R) {
2226 if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
2227 if (FD->getNumParams() == 1) {
2228 PreventedBy.push_back(FD);
2236 bool CXXMethodDecl::isCopyAssignmentOperator() const {
2237 // C++0x [class.copy]p17:
2238 // A user-declared copy assignment operator X::operator= is a non-static
2239 // non-template member function of class X with exactly one parameter of
2240 // type X, X&, const X&, volatile X& or const volatile X&.
2241 if (/*operator=*/getOverloadedOperator() != OO_Equal ||
2242 /*non-static*/ isStatic() ||
2243 /*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
2244 getNumParams() != 1)
2247 QualType ParamType = getParamDecl(0)->getType();
2248 if (const auto *Ref = ParamType->getAs<LValueReferenceType>())
2249 ParamType = Ref->getPointeeType();
2251 ASTContext &Context = getASTContext();
2253 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
2254 return Context.hasSameUnqualifiedType(ClassType, ParamType);
2257 bool CXXMethodDecl::isMoveAssignmentOperator() const {
2258 // C++0x [class.copy]p19:
2259 // A user-declared move assignment operator X::operator= is a non-static
2260 // non-template member function of class X with exactly one parameter of type
2261 // X&&, const X&&, volatile X&&, or const volatile X&&.
2262 if (getOverloadedOperator() != OO_Equal || isStatic() ||
2263 getPrimaryTemplate() || getDescribedFunctionTemplate() ||
2264 getNumParams() != 1)
2267 QualType ParamType = getParamDecl(0)->getType();
2268 if (!isa<RValueReferenceType>(ParamType))
2270 ParamType = ParamType->getPointeeType();
2272 ASTContext &Context = getASTContext();
2274 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
2275 return Context.hasSameUnqualifiedType(ClassType, ParamType);
2278 void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
2279 assert(MD->isCanonicalDecl() && "Method is not canonical!");
2280 assert(!MD->getParent()->isDependentContext() &&
2281 "Can't add an overridden method to a class template!");
2282 assert(MD->isVirtual() && "Method is not virtual!");
2284 getASTContext().addOverriddenMethod(this, MD);
2287 CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
2288 if (isa<CXXConstructorDecl>(this)) return nullptr;
2289 return getASTContext().overridden_methods_begin(this);
2292 CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
2293 if (isa<CXXConstructorDecl>(this)) return nullptr;
2294 return getASTContext().overridden_methods_end(this);
2297 unsigned CXXMethodDecl::size_overridden_methods() const {
2298 if (isa<CXXConstructorDecl>(this)) return 0;
2299 return getASTContext().overridden_methods_size(this);
2302 CXXMethodDecl::overridden_method_range
2303 CXXMethodDecl::overridden_methods() const {
2304 if (isa<CXXConstructorDecl>(this))
2305 return overridden_method_range(nullptr, nullptr);
2306 return getASTContext().overridden_methods(this);
2309 static QualType getThisObjectType(ASTContext &C, const FunctionProtoType *FPT,
2310 const CXXRecordDecl *Decl) {
2311 QualType ClassTy = C.getTypeDeclType(Decl);
2312 return C.getQualifiedType(ClassTy, FPT->getMethodQuals());
2315 QualType CXXMethodDecl::getThisType(const FunctionProtoType *FPT,
2316 const CXXRecordDecl *Decl) {
2317 ASTContext &C = Decl->getASTContext();
2318 QualType ObjectTy = ::getThisObjectType(C, FPT, Decl);
2319 return C.getPointerType(ObjectTy);
2322 QualType CXXMethodDecl::getThisObjectType(const FunctionProtoType *FPT,
2323 const CXXRecordDecl *Decl) {
2324 ASTContext &C = Decl->getASTContext();
2325 return ::getThisObjectType(C, FPT, Decl);
2328 QualType CXXMethodDecl::getThisType() const {
2329 // C++ 9.3.2p1: The type of this in a member function of a class X is X*.
2330 // If the member function is declared const, the type of this is const X*,
2331 // if the member function is declared volatile, the type of this is
2332 // volatile X*, and if the member function is declared const volatile,
2333 // the type of this is const volatile X*.
2334 assert(isInstance() && "No 'this' for static methods!");
2336 return CXXMethodDecl::getThisType(getType()->getAs<FunctionProtoType>(),
2340 QualType CXXMethodDecl::getThisObjectType() const {
2341 // Ditto getThisType.
2342 assert(isInstance() && "No 'this' for static methods!");
2344 return CXXMethodDecl::getThisObjectType(getType()->getAs<FunctionProtoType>(),
2348 bool CXXMethodDecl::hasInlineBody() const {
2349 // If this function is a template instantiation, look at the template from
2350 // which it was instantiated.
2351 const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
2355 const FunctionDecl *fn;
2356 return CheckFn->isDefined(fn) && !fn->isOutOfLine() &&
2357 (fn->doesThisDeclarationHaveABody() || fn->willHaveBody());
2360 bool CXXMethodDecl::isLambdaStaticInvoker() const {
2361 const CXXRecordDecl *P = getParent();
2362 if (P->isLambda()) {
2363 if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
2364 if (StaticInvoker == this) return true;
2365 if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
2366 return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
2372 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2373 TypeSourceInfo *TInfo, bool IsVirtual,
2374 SourceLocation L, Expr *Init,
2376 SourceLocation EllipsisLoc)
2377 : Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
2378 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
2379 IsWritten(false), SourceOrder(0) {}
2381 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2383 SourceLocation MemberLoc,
2384 SourceLocation L, Expr *Init,
2386 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
2387 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
2388 IsWritten(false), SourceOrder(0) {}
2390 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2391 IndirectFieldDecl *Member,
2392 SourceLocation MemberLoc,
2393 SourceLocation L, Expr *Init,
2395 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
2396 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
2397 IsWritten(false), SourceOrder(0) {}
2399 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2400 TypeSourceInfo *TInfo,
2401 SourceLocation L, Expr *Init,
2403 : Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
2404 IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
2406 int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
2407 return Context.getAllocator()
2408 .identifyKnownAlignedObject<CXXCtorInitializer>(this);
2411 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
2412 if (isBaseInitializer())
2413 return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
2418 const Type *CXXCtorInitializer::getBaseClass() const {
2419 if (isBaseInitializer())
2420 return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
2425 SourceLocation CXXCtorInitializer::getSourceLocation() const {
2426 if (isInClassMemberInitializer())
2427 return getAnyMember()->getLocation();
2429 if (isAnyMemberInitializer())
2430 return getMemberLocation();
2432 if (const auto *TSInfo = Initializee.get<TypeSourceInfo *>())
2433 return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
2438 SourceRange CXXCtorInitializer::getSourceRange() const {
2439 if (isInClassMemberInitializer()) {
2440 FieldDecl *D = getAnyMember();
2441 if (Expr *I = D->getInClassInitializer())
2442 return I->getSourceRange();
2446 return SourceRange(getSourceLocation(), getRParenLoc());
2449 CXXConstructorDecl::CXXConstructorDecl(
2450 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2451 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2452 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2453 ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited,
2454 Expr *TrailingRequiresClause)
2455 : CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo,
2456 SC_None, isInline, ConstexprKind, SourceLocation(),
2457 TrailingRequiresClause) {
2458 setNumCtorInitializers(0);
2459 setInheritingConstructor(static_cast<bool>(Inherited));
2460 setImplicit(isImplicitlyDeclared);
2461 CXXConstructorDeclBits.HasTrailingExplicitSpecifier = ES.getExpr() ? 1 : 0;
2463 *getTrailingObjects<InheritedConstructor>() = Inherited;
2464 setExplicitSpecifier(ES);
2467 void CXXConstructorDecl::anchor() {}
2469 CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
2471 uint64_t AllocKind) {
2472 bool hasTraillingExplicit = static_cast<bool>(AllocKind & TAKHasTailExplicit);
2473 bool isInheritingConstructor =
2474 static_cast<bool>(AllocKind & TAKInheritsConstructor);
2476 additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
2477 isInheritingConstructor, hasTraillingExplicit);
2478 auto *Result = new (C, ID, Extra)
2479 CXXConstructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2480 QualType(), nullptr, ExplicitSpecifier(), false, false,
2481 CSK_unspecified, InheritedConstructor(), nullptr);
2482 Result->setInheritingConstructor(isInheritingConstructor);
2483 Result->CXXConstructorDeclBits.HasTrailingExplicitSpecifier =
2484 hasTraillingExplicit;
2485 Result->setExplicitSpecifier(ExplicitSpecifier());
2489 CXXConstructorDecl *CXXConstructorDecl::Create(
2490 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2491 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2492 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2493 ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited,
2494 Expr *TrailingRequiresClause) {
2495 assert(NameInfo.getName().getNameKind()
2496 == DeclarationName::CXXConstructorName &&
2497 "Name must refer to a constructor");
2499 additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
2500 Inherited ? 1 : 0, ES.getExpr() ? 1 : 0);
2501 return new (C, RD, Extra)
2502 CXXConstructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, ES, isInline,
2503 isImplicitlyDeclared, ConstexprKind, Inherited,
2504 TrailingRequiresClause);
2507 CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
2508 return CtorInitializers.get(getASTContext().getExternalSource());
2511 CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
2512 assert(isDelegatingConstructor() && "Not a delegating constructor!");
2513 Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
2514 if (const auto *Construct = dyn_cast<CXXConstructExpr>(E))
2515 return Construct->getConstructor();
2520 bool CXXConstructorDecl::isDefaultConstructor() const {
2521 // C++ [class.ctor]p5:
2522 // A default constructor for a class X is a constructor of class
2523 // X that can be called without an argument.
2524 return (getNumParams() == 0) ||
2525 (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
2529 CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
2530 return isCopyOrMoveConstructor(TypeQuals) &&
2531 getParamDecl(0)->getType()->isLValueReferenceType();
2534 bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
2535 return isCopyOrMoveConstructor(TypeQuals) &&
2536 getParamDecl(0)->getType()->isRValueReferenceType();
2539 /// Determine whether this is a copy or move constructor.
2540 bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
2541 // C++ [class.copy]p2:
2542 // A non-template constructor for class X is a copy constructor
2543 // if its first parameter is of type X&, const X&, volatile X& or
2544 // const volatile X&, and either there are no other parameters
2545 // or else all other parameters have default arguments (8.3.6).
2546 // C++0x [class.copy]p3:
2547 // A non-template constructor for class X is a move constructor if its
2548 // first parameter is of type X&&, const X&&, volatile X&&, or
2549 // const volatile X&&, and either there are no other parameters or else
2550 // all other parameters have default arguments.
2551 if ((getNumParams() < 1) ||
2552 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2553 (getPrimaryTemplate() != nullptr) ||
2554 (getDescribedFunctionTemplate() != nullptr))
2557 const ParmVarDecl *Param = getParamDecl(0);
2559 // Do we have a reference type?
2560 const auto *ParamRefType = Param->getType()->getAs<ReferenceType>();
2564 // Is it a reference to our class type?
2565 ASTContext &Context = getASTContext();
2567 CanQualType PointeeType
2568 = Context.getCanonicalType(ParamRefType->getPointeeType());
2570 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2571 if (PointeeType.getUnqualifiedType() != ClassTy)
2574 // FIXME: other qualifiers?
2576 // We have a copy or move constructor.
2577 TypeQuals = PointeeType.getCVRQualifiers();
2581 bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
2582 // C++ [class.conv.ctor]p1:
2583 // A constructor declared without the function-specifier explicit
2584 // that can be called with a single parameter specifies a
2585 // conversion from the type of its first parameter to the type of
2586 // its class. Such a constructor is called a converting
2588 if (isExplicit() && !AllowExplicit)
2591 return (getNumParams() == 0 &&
2592 getType()->castAs<FunctionProtoType>()->isVariadic()) ||
2593 (getNumParams() == 1) ||
2594 (getNumParams() > 1 &&
2595 (getParamDecl(1)->hasDefaultArg() ||
2596 getParamDecl(1)->isParameterPack()));
2599 bool CXXConstructorDecl::isSpecializationCopyingObject() const {
2600 if ((getNumParams() < 1) ||
2601 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2602 (getDescribedFunctionTemplate() != nullptr))
2605 const ParmVarDecl *Param = getParamDecl(0);
2607 ASTContext &Context = getASTContext();
2608 CanQualType ParamType = Context.getCanonicalType(Param->getType());
2610 // Is it the same as our class type?
2612 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2613 if (ParamType.getUnqualifiedType() != ClassTy)
2619 void CXXDestructorDecl::anchor() {}
2622 CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2624 CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2625 QualType(), nullptr, false, false, CSK_unspecified,
2629 CXXDestructorDecl *CXXDestructorDecl::Create(
2630 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2631 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2632 bool isInline, bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
2633 Expr *TrailingRequiresClause) {
2634 assert(NameInfo.getName().getNameKind()
2635 == DeclarationName::CXXDestructorName &&
2636 "Name must refer to a destructor");
2638 CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline,
2639 isImplicitlyDeclared, ConstexprKind,
2640 TrailingRequiresClause);
2643 void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD, Expr *ThisArg) {
2644 auto *First = cast<CXXDestructorDecl>(getFirstDecl());
2645 if (OD && !First->OperatorDelete) {
2646 First->OperatorDelete = OD;
2647 First->OperatorDeleteThisArg = ThisArg;
2648 if (auto *L = getASTMutationListener())
2649 L->ResolvedOperatorDelete(First, OD, ThisArg);
2653 void CXXConversionDecl::anchor() {}
2656 CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2657 return new (C, ID) CXXConversionDecl(
2658 C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
2659 false, ExplicitSpecifier(), CSK_unspecified, SourceLocation(), nullptr);
2662 CXXConversionDecl *CXXConversionDecl::Create(
2663 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2664 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2665 bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
2666 SourceLocation EndLocation, Expr *TrailingRequiresClause) {
2667 assert(NameInfo.getName().getNameKind()
2668 == DeclarationName::CXXConversionFunctionName &&
2669 "Name must refer to a conversion function");
2671 CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline, ES,
2672 ConstexprKind, EndLocation, TrailingRequiresClause);
2675 bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
2676 return isImplicit() && getParent()->isLambda() &&
2677 getConversionType()->isBlockPointerType();
2680 LinkageSpecDecl::LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
2681 SourceLocation LangLoc, LanguageIDs lang,
2683 : Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec),
2684 ExternLoc(ExternLoc), RBraceLoc(SourceLocation()) {
2686 LinkageSpecDeclBits.HasBraces = HasBraces;
2689 void LinkageSpecDecl::anchor() {}
2691 LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
2693 SourceLocation ExternLoc,
2694 SourceLocation LangLoc,
2697 return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2700 LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
2702 return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
2703 SourceLocation(), lang_c, false);
2706 void UsingDirectiveDecl::anchor() {}
2708 UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
2710 SourceLocation NamespaceLoc,
2711 NestedNameSpecifierLoc QualifierLoc,
2712 SourceLocation IdentLoc,
2714 DeclContext *CommonAncestor) {
2715 if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Used))
2716 Used = NS->getOriginalNamespace();
2717 return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
2718 IdentLoc, Used, CommonAncestor);
2721 UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
2723 return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
2725 NestedNameSpecifierLoc(),
2726 SourceLocation(), nullptr, nullptr);
2729 NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
2730 if (auto *NA = dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
2731 return NA->getNamespace();
2732 return cast_or_null<NamespaceDecl>(NominatedNamespace);
2735 NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
2736 SourceLocation StartLoc, SourceLocation IdLoc,
2737 IdentifierInfo *Id, NamespaceDecl *PrevDecl)
2738 : NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
2739 redeclarable_base(C), LocStart(StartLoc),
2740 AnonOrFirstNamespaceAndInline(nullptr, Inline) {
2741 setPreviousDecl(PrevDecl);
2744 AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
2747 NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
2748 bool Inline, SourceLocation StartLoc,
2749 SourceLocation IdLoc, IdentifierInfo *Id,
2750 NamespaceDecl *PrevDecl) {
2751 return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
2755 NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2756 return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
2757 SourceLocation(), nullptr, nullptr);
2760 NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
2764 return AnonOrFirstNamespaceAndInline.getPointer();
2767 const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
2771 return AnonOrFirstNamespaceAndInline.getPointer();
2774 bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
2776 NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
2777 return getNextRedeclaration();
2780 NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
2781 return getPreviousDecl();
2784 NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
2785 return getMostRecentDecl();
2788 void NamespaceAliasDecl::anchor() {}
2790 NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
2791 return getNextRedeclaration();
2794 NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
2795 return getPreviousDecl();
2798 NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
2799 return getMostRecentDecl();
2802 NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
2803 SourceLocation UsingLoc,
2804 SourceLocation AliasLoc,
2805 IdentifierInfo *Alias,
2806 NestedNameSpecifierLoc QualifierLoc,
2807 SourceLocation IdentLoc,
2808 NamedDecl *Namespace) {
2809 // FIXME: Preserve the aliased namespace as written.
2810 if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
2811 Namespace = NS->getOriginalNamespace();
2812 return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
2813 QualifierLoc, IdentLoc, Namespace);
2816 NamespaceAliasDecl *
2817 NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2818 return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
2819 SourceLocation(), nullptr,
2820 NestedNameSpecifierLoc(),
2821 SourceLocation(), nullptr);
2824 void LifetimeExtendedTemporaryDecl::anchor() {}
2826 /// Retrieve the storage duration for the materialized temporary.
2827 StorageDuration LifetimeExtendedTemporaryDecl::getStorageDuration() const {
2828 const ValueDecl *ExtendingDecl = getExtendingDecl();
2830 return SD_FullExpression;
2831 // FIXME: This is not necessarily correct for a temporary materialized
2832 // within a default initializer.
2833 if (isa<FieldDecl>(ExtendingDecl))
2834 return SD_Automatic;
2835 // FIXME: This only works because storage class specifiers are not allowed
2836 // on decomposition declarations.
2837 if (isa<BindingDecl>(ExtendingDecl))
2838 return ExtendingDecl->getDeclContext()->isFunctionOrMethod() ? SD_Automatic
2840 return cast<VarDecl>(ExtendingDecl)->getStorageDuration();
2843 APValue *LifetimeExtendedTemporaryDecl::getOrCreateValue(bool MayCreate) const {
2844 assert(getStorageDuration() == SD_Static &&
2845 "don't need to cache the computed value for this temporary");
2846 if (MayCreate && !Value) {
2847 Value = (new (getASTContext()) APValue);
2848 getASTContext().addDestruction(Value);
2850 assert(Value && "may not be null");
2854 void UsingShadowDecl::anchor() {}
2856 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
2857 SourceLocation Loc, UsingDecl *Using,
2859 : NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
2860 redeclarable_base(C), UsingOrNextShadow(cast<NamedDecl>(Using)) {
2862 setTargetDecl(Target);
2866 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
2867 : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
2868 redeclarable_base(C) {}
2871 UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2872 return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2875 UsingDecl *UsingShadowDecl::getUsingDecl() const {
2876 const UsingShadowDecl *Shadow = this;
2877 while (const auto *NextShadow =
2878 dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
2879 Shadow = NextShadow;
2880 return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2883 void ConstructorUsingShadowDecl::anchor() {}
2885 ConstructorUsingShadowDecl *
2886 ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
2887 SourceLocation Loc, UsingDecl *Using,
2888 NamedDecl *Target, bool IsVirtual) {
2889 return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
2893 ConstructorUsingShadowDecl *
2894 ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2895 return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2898 CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
2899 return getUsingDecl()->getQualifier()->getAsRecordDecl();
2902 void UsingDecl::anchor() {}
2904 void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
2905 assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
2906 "declaration already in set");
2907 assert(S->getUsingDecl() == this);
2909 if (FirstUsingShadow.getPointer())
2910 S->UsingOrNextShadow = FirstUsingShadow.getPointer();
2911 FirstUsingShadow.setPointer(S);
2914 void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
2915 assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
2916 "declaration not in set");
2917 assert(S->getUsingDecl() == this);
2919 // Remove S from the shadow decl chain. This is O(n) but hopefully rare.
2921 if (FirstUsingShadow.getPointer() == S) {
2922 FirstUsingShadow.setPointer(
2923 dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
2924 S->UsingOrNextShadow = this;
2928 UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
2929 while (Prev->UsingOrNextShadow != S)
2930 Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
2931 Prev->UsingOrNextShadow = S->UsingOrNextShadow;
2932 S->UsingOrNextShadow = this;
2935 UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
2936 NestedNameSpecifierLoc QualifierLoc,
2937 const DeclarationNameInfo &NameInfo,
2939 return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
2942 UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2943 return new (C, ID) UsingDecl(nullptr, SourceLocation(),
2944 NestedNameSpecifierLoc(), DeclarationNameInfo(),
2948 SourceRange UsingDecl::getSourceRange() const {
2949 SourceLocation Begin = isAccessDeclaration()
2950 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2951 return SourceRange(Begin, getNameInfo().getEndLoc());
2954 void UsingPackDecl::anchor() {}
2956 UsingPackDecl *UsingPackDecl::Create(ASTContext &C, DeclContext *DC,
2957 NamedDecl *InstantiatedFrom,
2958 ArrayRef<NamedDecl *> UsingDecls) {
2959 size_t Extra = additionalSizeToAlloc<NamedDecl *>(UsingDecls.size());
2960 return new (C, DC, Extra) UsingPackDecl(DC, InstantiatedFrom, UsingDecls);
2963 UsingPackDecl *UsingPackDecl::CreateDeserialized(ASTContext &C, unsigned ID,
2964 unsigned NumExpansions) {
2965 size_t Extra = additionalSizeToAlloc<NamedDecl *>(NumExpansions);
2966 auto *Result = new (C, ID, Extra) UsingPackDecl(nullptr, nullptr, None);
2967 Result->NumExpansions = NumExpansions;
2968 auto *Trail = Result->getTrailingObjects<NamedDecl *>();
2969 for (unsigned I = 0; I != NumExpansions; ++I)
2970 new (Trail + I) NamedDecl*(nullptr);
2974 void UnresolvedUsingValueDecl::anchor() {}
2976 UnresolvedUsingValueDecl *
2977 UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
2978 SourceLocation UsingLoc,
2979 NestedNameSpecifierLoc QualifierLoc,
2980 const DeclarationNameInfo &NameInfo,
2981 SourceLocation EllipsisLoc) {
2982 return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
2983 QualifierLoc, NameInfo,
2987 UnresolvedUsingValueDecl *
2988 UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2989 return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
2991 NestedNameSpecifierLoc(),
2992 DeclarationNameInfo(),
2996 SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
2997 SourceLocation Begin = isAccessDeclaration()
2998 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2999 return SourceRange(Begin, getNameInfo().getEndLoc());
3002 void UnresolvedUsingTypenameDecl::anchor() {}
3004 UnresolvedUsingTypenameDecl *
3005 UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
3006 SourceLocation UsingLoc,
3007 SourceLocation TypenameLoc,
3008 NestedNameSpecifierLoc QualifierLoc,
3009 SourceLocation TargetNameLoc,
3010 DeclarationName TargetName,
3011 SourceLocation EllipsisLoc) {
3012 return new (C, DC) UnresolvedUsingTypenameDecl(
3013 DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
3014 TargetName.getAsIdentifierInfo(), EllipsisLoc);
3017 UnresolvedUsingTypenameDecl *
3018 UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3019 return new (C, ID) UnresolvedUsingTypenameDecl(
3020 nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
3021 SourceLocation(), nullptr, SourceLocation());
3024 void StaticAssertDecl::anchor() {}
3026 StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
3027 SourceLocation StaticAssertLoc,
3029 StringLiteral *Message,
3030 SourceLocation RParenLoc,
3032 return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
3036 StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
3038 return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
3039 nullptr, SourceLocation(), false);
3042 void BindingDecl::anchor() {}
3044 BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
3045 SourceLocation IdLoc, IdentifierInfo *Id) {
3046 return new (C, DC) BindingDecl(DC, IdLoc, Id);
3049 BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3050 return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
3053 ValueDecl *BindingDecl::getDecomposedDecl() const {
3054 ExternalASTSource *Source =
3055 Decomp.isOffset() ? getASTContext().getExternalSource() : nullptr;
3056 return cast_or_null<ValueDecl>(Decomp.get(Source));
3059 VarDecl *BindingDecl::getHoldingVar() const {
3060 Expr *B = getBinding();
3063 auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
3067 auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
3068 assert(VD->isImplicit() && "holding var for binding decl not implicit");
3072 void DecompositionDecl::anchor() {}
3074 DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
3075 SourceLocation StartLoc,
3076 SourceLocation LSquareLoc,
3077 QualType T, TypeSourceInfo *TInfo,
3079 ArrayRef<BindingDecl *> Bindings) {
3080 size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
3081 return new (C, DC, Extra)
3082 DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
3085 DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
3087 unsigned NumBindings) {
3088 size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
3089 auto *Result = new (C, ID, Extra)
3090 DecompositionDecl(C, nullptr, SourceLocation(), SourceLocation(),
3091 QualType(), nullptr, StorageClass(), None);
3092 // Set up and clean out the bindings array.
3093 Result->NumBindings = NumBindings;
3094 auto *Trail = Result->getTrailingObjects<BindingDecl *>();
3095 for (unsigned I = 0; I != NumBindings; ++I)
3096 new (Trail + I) BindingDecl*(nullptr);
3100 void DecompositionDecl::printName(llvm::raw_ostream &os) const {
3103 for (const auto *B : bindings()) {
3112 void MSPropertyDecl::anchor() {}
3114 MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
3115 SourceLocation L, DeclarationName N,
3116 QualType T, TypeSourceInfo *TInfo,
3117 SourceLocation StartL,
3118 IdentifierInfo *Getter,
3119 IdentifierInfo *Setter) {
3120 return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
3123 MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
3125 return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
3126 DeclarationName(), QualType(), nullptr,
3127 SourceLocation(), nullptr, nullptr);
3130 static const char *getAccessName(AccessSpecifier AS) {
3133 llvm_unreachable("Invalid access specifier!");
3141 llvm_unreachable("Invalid access specifier!");
3144 const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
3145 AccessSpecifier AS) {
3146 return DB << getAccessName(AS);
3149 const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
3150 AccessSpecifier AS) {
3151 return DB << getAccessName(AS);