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 llvm::SmallVector<CXXMethodDecl*, 4> FinalOverriders;
2042 auto AddFinalOverrider = [&](CXXMethodDecl *D) {
2043 // If this function is overridden by a candidate final overrider, it is not
2044 // a final overrider.
2045 for (CXXMethodDecl *OtherD : FinalOverriders) {
2046 if (declaresSameEntity(D, OtherD) || recursivelyOverrides(OtherD, D))
2050 // Other candidate final overriders might be overridden by this function.
2051 FinalOverriders.erase(
2052 std::remove_if(FinalOverriders.begin(), FinalOverriders.end(),
2053 [&](CXXMethodDecl *OtherD) {
2054 return recursivelyOverrides(D, OtherD);
2056 FinalOverriders.end());
2058 FinalOverriders.push_back(D);
2061 for (const auto &I : RD->bases()) {
2062 const RecordType *RT = I.getType()->getAs<RecordType>();
2065 const auto *Base = cast<CXXRecordDecl>(RT->getDecl());
2066 if (CXXMethodDecl *D = this->getCorrespondingMethodInClass(Base))
2067 AddFinalOverrider(D);
2070 return FinalOverriders.size() == 1 ? FinalOverriders.front() : nullptr;
2073 CXXMethodDecl *CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2074 SourceLocation StartLoc,
2075 const DeclarationNameInfo &NameInfo,
2076 QualType T, TypeSourceInfo *TInfo,
2077 StorageClass SC, bool isInline,
2078 ConstexprSpecKind ConstexprKind,
2079 SourceLocation EndLocation,
2080 Expr *TrailingRequiresClause) {
2082 CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo, T, TInfo, SC,
2083 isInline, ConstexprKind, EndLocation,
2084 TrailingRequiresClause);
2087 CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2088 return new (C, ID) CXXMethodDecl(
2089 CXXMethod, C, nullptr, SourceLocation(), DeclarationNameInfo(),
2090 QualType(), nullptr, SC_None, false, CSK_unspecified, SourceLocation(),
2094 CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
2096 assert(isVirtual() && "this method is expected to be virtual");
2098 // When building with -fapple-kext, all calls must go through the vtable since
2099 // the kernel linker can do runtime patching of vtables.
2103 // If the member function is marked 'final', we know that it can't be
2104 // overridden and can therefore devirtualize it unless it's pure virtual.
2105 if (hasAttr<FinalAttr>())
2106 return isPure() ? nullptr : this;
2108 // If Base is unknown, we cannot devirtualize.
2112 // If the base expression (after skipping derived-to-base conversions) is a
2113 // class prvalue, then we can devirtualize.
2114 Base = Base->getBestDynamicClassTypeExpr();
2115 if (Base->isRValue() && Base->getType()->isRecordType())
2118 // If we don't even know what we would call, we can't devirtualize.
2119 const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType();
2120 if (!BestDynamicDecl)
2123 // There may be a method corresponding to MD in a derived class.
2124 CXXMethodDecl *DevirtualizedMethod =
2125 getCorrespondingMethodInClass(BestDynamicDecl);
2127 // If there final overrider in the dynamic type is ambiguous, we can't
2128 // devirtualize this call.
2129 if (!DevirtualizedMethod)
2132 // If that method is pure virtual, we can't devirtualize. If this code is
2133 // reached, the result would be UB, not a direct call to the derived class
2134 // function, and we can't assume the derived class function is defined.
2135 if (DevirtualizedMethod->isPure())
2138 // If that method is marked final, we can devirtualize it.
2139 if (DevirtualizedMethod->hasAttr<FinalAttr>())
2140 return DevirtualizedMethod;
2142 // Similarly, if the class itself or its destructor is marked 'final',
2143 // the class can't be derived from and we can therefore devirtualize the
2144 // member function call.
2145 if (BestDynamicDecl->hasAttr<FinalAttr>())
2146 return DevirtualizedMethod;
2147 if (const auto *dtor = BestDynamicDecl->getDestructor()) {
2148 if (dtor->hasAttr<FinalAttr>())
2149 return DevirtualizedMethod;
2152 if (const auto *DRE = dyn_cast<DeclRefExpr>(Base)) {
2153 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
2154 if (VD->getType()->isRecordType())
2155 // This is a record decl. We know the type and can devirtualize it.
2156 return DevirtualizedMethod;
2161 // We can devirtualize calls on an object accessed by a class member access
2162 // expression, since by C++11 [basic.life]p6 we know that it can't refer to
2163 // a derived class object constructed in the same location.
2164 if (const auto *ME = dyn_cast<MemberExpr>(Base)) {
2165 const ValueDecl *VD = ME->getMemberDecl();
2166 return VD->getType()->isRecordType() ? DevirtualizedMethod : nullptr;
2169 // Likewise for calls on an object accessed by a (non-reference) pointer to
2171 if (auto *BO = dyn_cast<BinaryOperator>(Base)) {
2172 if (BO->isPtrMemOp()) {
2173 auto *MPT = BO->getRHS()->getType()->castAs<MemberPointerType>();
2174 if (MPT->getPointeeType()->isRecordType())
2175 return DevirtualizedMethod;
2179 // We can't devirtualize the call.
2183 bool CXXMethodDecl::isUsualDeallocationFunction(
2184 SmallVectorImpl<const FunctionDecl *> &PreventedBy) const {
2185 assert(PreventedBy.empty() && "PreventedBy is expected to be empty");
2186 if (getOverloadedOperator() != OO_Delete &&
2187 getOverloadedOperator() != OO_Array_Delete)
2190 // C++ [basic.stc.dynamic.deallocation]p2:
2191 // A template instance is never a usual deallocation function,
2192 // regardless of its signature.
2193 if (getPrimaryTemplate())
2196 // C++ [basic.stc.dynamic.deallocation]p2:
2197 // If a class T has a member deallocation function named operator delete
2198 // with exactly one parameter, then that function is a usual (non-placement)
2199 // deallocation function. [...]
2200 if (getNumParams() == 1)
2202 unsigned UsualParams = 1;
2205 // A destroying operator delete is a usual deallocation function if
2206 // removing the std::destroying_delete_t parameter and changing the
2207 // first parameter type from T* to void* results in the signature of
2208 // a usual deallocation function.
2209 if (isDestroyingOperatorDelete())
2212 // C++ <=14 [basic.stc.dynamic.deallocation]p2:
2213 // [...] If class T does not declare such an operator delete but does
2214 // declare a member deallocation function named operator delete with
2215 // exactly two parameters, the second of which has type std::size_t (18.1),
2216 // then this function is a usual deallocation function.
2218 // C++17 says a usual deallocation function is one with the signature
2219 // (void* [, size_t] [, std::align_val_t] [, ...])
2220 // and all such functions are usual deallocation functions. It's not clear
2221 // that allowing varargs functions was intentional.
2222 ASTContext &Context = getASTContext();
2223 if (UsualParams < getNumParams() &&
2224 Context.hasSameUnqualifiedType(getParamDecl(UsualParams)->getType(),
2225 Context.getSizeType()))
2228 if (UsualParams < getNumParams() &&
2229 getParamDecl(UsualParams)->getType()->isAlignValT())
2232 if (UsualParams != getNumParams())
2235 // In C++17 onwards, all potential usual deallocation functions are actual
2236 // usual deallocation functions. Honor this behavior when post-C++14
2237 // deallocation functions are offered as extensions too.
2238 // FIXME(EricWF): Destrying Delete should be a language option. How do we
2239 // handle when destroying delete is used prior to C++17?
2240 if (Context.getLangOpts().CPlusPlus17 ||
2241 Context.getLangOpts().AlignedAllocation ||
2242 isDestroyingOperatorDelete())
2245 // This function is a usual deallocation function if there are no
2246 // single-parameter deallocation functions of the same kind.
2247 DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
2249 for (const auto *D : R) {
2250 if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
2251 if (FD->getNumParams() == 1) {
2252 PreventedBy.push_back(FD);
2260 bool CXXMethodDecl::isCopyAssignmentOperator() const {
2261 // C++0x [class.copy]p17:
2262 // A user-declared copy assignment operator X::operator= is a non-static
2263 // non-template member function of class X with exactly one parameter of
2264 // type X, X&, const X&, volatile X& or const volatile X&.
2265 if (/*operator=*/getOverloadedOperator() != OO_Equal ||
2266 /*non-static*/ isStatic() ||
2267 /*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
2268 getNumParams() != 1)
2271 QualType ParamType = getParamDecl(0)->getType();
2272 if (const auto *Ref = ParamType->getAs<LValueReferenceType>())
2273 ParamType = Ref->getPointeeType();
2275 ASTContext &Context = getASTContext();
2277 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
2278 return Context.hasSameUnqualifiedType(ClassType, ParamType);
2281 bool CXXMethodDecl::isMoveAssignmentOperator() const {
2282 // C++0x [class.copy]p19:
2283 // A user-declared move assignment operator X::operator= is a non-static
2284 // non-template member function of class X with exactly one parameter of type
2285 // X&&, const X&&, volatile X&&, or const volatile X&&.
2286 if (getOverloadedOperator() != OO_Equal || isStatic() ||
2287 getPrimaryTemplate() || getDescribedFunctionTemplate() ||
2288 getNumParams() != 1)
2291 QualType ParamType = getParamDecl(0)->getType();
2292 if (!isa<RValueReferenceType>(ParamType))
2294 ParamType = ParamType->getPointeeType();
2296 ASTContext &Context = getASTContext();
2298 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
2299 return Context.hasSameUnqualifiedType(ClassType, ParamType);
2302 void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
2303 assert(MD->isCanonicalDecl() && "Method is not canonical!");
2304 assert(!MD->getParent()->isDependentContext() &&
2305 "Can't add an overridden method to a class template!");
2306 assert(MD->isVirtual() && "Method is not virtual!");
2308 getASTContext().addOverriddenMethod(this, MD);
2311 CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
2312 if (isa<CXXConstructorDecl>(this)) return nullptr;
2313 return getASTContext().overridden_methods_begin(this);
2316 CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
2317 if (isa<CXXConstructorDecl>(this)) return nullptr;
2318 return getASTContext().overridden_methods_end(this);
2321 unsigned CXXMethodDecl::size_overridden_methods() const {
2322 if (isa<CXXConstructorDecl>(this)) return 0;
2323 return getASTContext().overridden_methods_size(this);
2326 CXXMethodDecl::overridden_method_range
2327 CXXMethodDecl::overridden_methods() const {
2328 if (isa<CXXConstructorDecl>(this))
2329 return overridden_method_range(nullptr, nullptr);
2330 return getASTContext().overridden_methods(this);
2333 static QualType getThisObjectType(ASTContext &C, const FunctionProtoType *FPT,
2334 const CXXRecordDecl *Decl) {
2335 QualType ClassTy = C.getTypeDeclType(Decl);
2336 return C.getQualifiedType(ClassTy, FPT->getMethodQuals());
2339 QualType CXXMethodDecl::getThisType(const FunctionProtoType *FPT,
2340 const CXXRecordDecl *Decl) {
2341 ASTContext &C = Decl->getASTContext();
2342 QualType ObjectTy = ::getThisObjectType(C, FPT, Decl);
2343 return C.getPointerType(ObjectTy);
2346 QualType CXXMethodDecl::getThisObjectType(const FunctionProtoType *FPT,
2347 const CXXRecordDecl *Decl) {
2348 ASTContext &C = Decl->getASTContext();
2349 return ::getThisObjectType(C, FPT, Decl);
2352 QualType CXXMethodDecl::getThisType() const {
2353 // C++ 9.3.2p1: The type of this in a member function of a class X is X*.
2354 // If the member function is declared const, the type of this is const X*,
2355 // if the member function is declared volatile, the type of this is
2356 // volatile X*, and if the member function is declared const volatile,
2357 // the type of this is const volatile X*.
2358 assert(isInstance() && "No 'this' for static methods!");
2360 return CXXMethodDecl::getThisType(getType()->getAs<FunctionProtoType>(),
2364 QualType CXXMethodDecl::getThisObjectType() const {
2365 // Ditto getThisType.
2366 assert(isInstance() && "No 'this' for static methods!");
2368 return CXXMethodDecl::getThisObjectType(getType()->getAs<FunctionProtoType>(),
2372 bool CXXMethodDecl::hasInlineBody() const {
2373 // If this function is a template instantiation, look at the template from
2374 // which it was instantiated.
2375 const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
2379 const FunctionDecl *fn;
2380 return CheckFn->isDefined(fn) && !fn->isOutOfLine() &&
2381 (fn->doesThisDeclarationHaveABody() || fn->willHaveBody());
2384 bool CXXMethodDecl::isLambdaStaticInvoker() const {
2385 const CXXRecordDecl *P = getParent();
2386 if (P->isLambda()) {
2387 if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
2388 if (StaticInvoker == this) return true;
2389 if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
2390 return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
2396 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2397 TypeSourceInfo *TInfo, bool IsVirtual,
2398 SourceLocation L, Expr *Init,
2400 SourceLocation EllipsisLoc)
2401 : Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
2402 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
2403 IsWritten(false), SourceOrder(0) {}
2405 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2407 SourceLocation MemberLoc,
2408 SourceLocation L, Expr *Init,
2410 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
2411 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
2412 IsWritten(false), SourceOrder(0) {}
2414 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2415 IndirectFieldDecl *Member,
2416 SourceLocation MemberLoc,
2417 SourceLocation L, Expr *Init,
2419 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
2420 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
2421 IsWritten(false), SourceOrder(0) {}
2423 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2424 TypeSourceInfo *TInfo,
2425 SourceLocation L, Expr *Init,
2427 : Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
2428 IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
2430 int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
2431 return Context.getAllocator()
2432 .identifyKnownAlignedObject<CXXCtorInitializer>(this);
2435 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
2436 if (isBaseInitializer())
2437 return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
2442 const Type *CXXCtorInitializer::getBaseClass() const {
2443 if (isBaseInitializer())
2444 return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
2449 SourceLocation CXXCtorInitializer::getSourceLocation() const {
2450 if (isInClassMemberInitializer())
2451 return getAnyMember()->getLocation();
2453 if (isAnyMemberInitializer())
2454 return getMemberLocation();
2456 if (const auto *TSInfo = Initializee.get<TypeSourceInfo *>())
2457 return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
2462 SourceRange CXXCtorInitializer::getSourceRange() const {
2463 if (isInClassMemberInitializer()) {
2464 FieldDecl *D = getAnyMember();
2465 if (Expr *I = D->getInClassInitializer())
2466 return I->getSourceRange();
2470 return SourceRange(getSourceLocation(), getRParenLoc());
2473 CXXConstructorDecl::CXXConstructorDecl(
2474 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2475 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2476 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2477 ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited,
2478 Expr *TrailingRequiresClause)
2479 : CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo,
2480 SC_None, isInline, ConstexprKind, SourceLocation(),
2481 TrailingRequiresClause) {
2482 setNumCtorInitializers(0);
2483 setInheritingConstructor(static_cast<bool>(Inherited));
2484 setImplicit(isImplicitlyDeclared);
2485 CXXConstructorDeclBits.HasTrailingExplicitSpecifier = ES.getExpr() ? 1 : 0;
2487 *getTrailingObjects<InheritedConstructor>() = Inherited;
2488 setExplicitSpecifier(ES);
2491 void CXXConstructorDecl::anchor() {}
2493 CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
2495 uint64_t AllocKind) {
2496 bool hasTraillingExplicit = static_cast<bool>(AllocKind & TAKHasTailExplicit);
2497 bool isInheritingConstructor =
2498 static_cast<bool>(AllocKind & TAKInheritsConstructor);
2500 additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
2501 isInheritingConstructor, hasTraillingExplicit);
2502 auto *Result = new (C, ID, Extra)
2503 CXXConstructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2504 QualType(), nullptr, ExplicitSpecifier(), false, false,
2505 CSK_unspecified, InheritedConstructor(), nullptr);
2506 Result->setInheritingConstructor(isInheritingConstructor);
2507 Result->CXXConstructorDeclBits.HasTrailingExplicitSpecifier =
2508 hasTraillingExplicit;
2509 Result->setExplicitSpecifier(ExplicitSpecifier());
2513 CXXConstructorDecl *CXXConstructorDecl::Create(
2514 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2515 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2516 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2517 ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited,
2518 Expr *TrailingRequiresClause) {
2519 assert(NameInfo.getName().getNameKind()
2520 == DeclarationName::CXXConstructorName &&
2521 "Name must refer to a constructor");
2523 additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
2524 Inherited ? 1 : 0, ES.getExpr() ? 1 : 0);
2525 return new (C, RD, Extra)
2526 CXXConstructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, ES, isInline,
2527 isImplicitlyDeclared, ConstexprKind, Inherited,
2528 TrailingRequiresClause);
2531 CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
2532 return CtorInitializers.get(getASTContext().getExternalSource());
2535 CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
2536 assert(isDelegatingConstructor() && "Not a delegating constructor!");
2537 Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
2538 if (const auto *Construct = dyn_cast<CXXConstructExpr>(E))
2539 return Construct->getConstructor();
2544 bool CXXConstructorDecl::isDefaultConstructor() const {
2545 // C++ [class.ctor]p5:
2546 // A default constructor for a class X is a constructor of class
2547 // X that can be called without an argument.
2548 return (getNumParams() == 0) ||
2549 (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
2553 CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
2554 return isCopyOrMoveConstructor(TypeQuals) &&
2555 getParamDecl(0)->getType()->isLValueReferenceType();
2558 bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
2559 return isCopyOrMoveConstructor(TypeQuals) &&
2560 getParamDecl(0)->getType()->isRValueReferenceType();
2563 /// Determine whether this is a copy or move constructor.
2564 bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
2565 // C++ [class.copy]p2:
2566 // A non-template constructor for class X is a copy constructor
2567 // if its first parameter is of type X&, const X&, volatile X& or
2568 // const volatile X&, and either there are no other parameters
2569 // or else all other parameters have default arguments (8.3.6).
2570 // C++0x [class.copy]p3:
2571 // A non-template constructor for class X is a move constructor if its
2572 // first parameter is of type X&&, const X&&, volatile X&&, or
2573 // const volatile X&&, and either there are no other parameters or else
2574 // all other parameters have default arguments.
2575 if ((getNumParams() < 1) ||
2576 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2577 (getPrimaryTemplate() != nullptr) ||
2578 (getDescribedFunctionTemplate() != nullptr))
2581 const ParmVarDecl *Param = getParamDecl(0);
2583 // Do we have a reference type?
2584 const auto *ParamRefType = Param->getType()->getAs<ReferenceType>();
2588 // Is it a reference to our class type?
2589 ASTContext &Context = getASTContext();
2591 CanQualType PointeeType
2592 = Context.getCanonicalType(ParamRefType->getPointeeType());
2594 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2595 if (PointeeType.getUnqualifiedType() != ClassTy)
2598 // FIXME: other qualifiers?
2600 // We have a copy or move constructor.
2601 TypeQuals = PointeeType.getCVRQualifiers();
2605 bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
2606 // C++ [class.conv.ctor]p1:
2607 // A constructor declared without the function-specifier explicit
2608 // that can be called with a single parameter specifies a
2609 // conversion from the type of its first parameter to the type of
2610 // its class. Such a constructor is called a converting
2612 if (isExplicit() && !AllowExplicit)
2615 return (getNumParams() == 0 &&
2616 getType()->castAs<FunctionProtoType>()->isVariadic()) ||
2617 (getNumParams() == 1) ||
2618 (getNumParams() > 1 &&
2619 (getParamDecl(1)->hasDefaultArg() ||
2620 getParamDecl(1)->isParameterPack()));
2623 bool CXXConstructorDecl::isSpecializationCopyingObject() const {
2624 if ((getNumParams() < 1) ||
2625 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2626 (getDescribedFunctionTemplate() != nullptr))
2629 const ParmVarDecl *Param = getParamDecl(0);
2631 ASTContext &Context = getASTContext();
2632 CanQualType ParamType = Context.getCanonicalType(Param->getType());
2634 // Is it the same as our class type?
2636 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2637 if (ParamType.getUnqualifiedType() != ClassTy)
2643 void CXXDestructorDecl::anchor() {}
2646 CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2648 CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2649 QualType(), nullptr, false, false, CSK_unspecified,
2653 CXXDestructorDecl *CXXDestructorDecl::Create(
2654 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2655 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2656 bool isInline, bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
2657 Expr *TrailingRequiresClause) {
2658 assert(NameInfo.getName().getNameKind()
2659 == DeclarationName::CXXDestructorName &&
2660 "Name must refer to a destructor");
2662 CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline,
2663 isImplicitlyDeclared, ConstexprKind,
2664 TrailingRequiresClause);
2667 void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD, Expr *ThisArg) {
2668 auto *First = cast<CXXDestructorDecl>(getFirstDecl());
2669 if (OD && !First->OperatorDelete) {
2670 First->OperatorDelete = OD;
2671 First->OperatorDeleteThisArg = ThisArg;
2672 if (auto *L = getASTMutationListener())
2673 L->ResolvedOperatorDelete(First, OD, ThisArg);
2677 void CXXConversionDecl::anchor() {}
2680 CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2681 return new (C, ID) CXXConversionDecl(
2682 C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
2683 false, ExplicitSpecifier(), CSK_unspecified, SourceLocation(), nullptr);
2686 CXXConversionDecl *CXXConversionDecl::Create(
2687 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2688 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2689 bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
2690 SourceLocation EndLocation, Expr *TrailingRequiresClause) {
2691 assert(NameInfo.getName().getNameKind()
2692 == DeclarationName::CXXConversionFunctionName &&
2693 "Name must refer to a conversion function");
2695 CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline, ES,
2696 ConstexprKind, EndLocation, TrailingRequiresClause);
2699 bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
2700 return isImplicit() && getParent()->isLambda() &&
2701 getConversionType()->isBlockPointerType();
2704 LinkageSpecDecl::LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
2705 SourceLocation LangLoc, LanguageIDs lang,
2707 : Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec),
2708 ExternLoc(ExternLoc), RBraceLoc(SourceLocation()) {
2710 LinkageSpecDeclBits.HasBraces = HasBraces;
2713 void LinkageSpecDecl::anchor() {}
2715 LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
2717 SourceLocation ExternLoc,
2718 SourceLocation LangLoc,
2721 return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2724 LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
2726 return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
2727 SourceLocation(), lang_c, false);
2730 void UsingDirectiveDecl::anchor() {}
2732 UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
2734 SourceLocation NamespaceLoc,
2735 NestedNameSpecifierLoc QualifierLoc,
2736 SourceLocation IdentLoc,
2738 DeclContext *CommonAncestor) {
2739 if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Used))
2740 Used = NS->getOriginalNamespace();
2741 return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
2742 IdentLoc, Used, CommonAncestor);
2745 UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
2747 return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
2749 NestedNameSpecifierLoc(),
2750 SourceLocation(), nullptr, nullptr);
2753 NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
2754 if (auto *NA = dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
2755 return NA->getNamespace();
2756 return cast_or_null<NamespaceDecl>(NominatedNamespace);
2759 NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
2760 SourceLocation StartLoc, SourceLocation IdLoc,
2761 IdentifierInfo *Id, NamespaceDecl *PrevDecl)
2762 : NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
2763 redeclarable_base(C), LocStart(StartLoc),
2764 AnonOrFirstNamespaceAndInline(nullptr, Inline) {
2765 setPreviousDecl(PrevDecl);
2768 AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
2771 NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
2772 bool Inline, SourceLocation StartLoc,
2773 SourceLocation IdLoc, IdentifierInfo *Id,
2774 NamespaceDecl *PrevDecl) {
2775 return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
2779 NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2780 return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
2781 SourceLocation(), nullptr, nullptr);
2784 NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
2788 return AnonOrFirstNamespaceAndInline.getPointer();
2791 const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
2795 return AnonOrFirstNamespaceAndInline.getPointer();
2798 bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
2800 NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
2801 return getNextRedeclaration();
2804 NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
2805 return getPreviousDecl();
2808 NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
2809 return getMostRecentDecl();
2812 void NamespaceAliasDecl::anchor() {}
2814 NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
2815 return getNextRedeclaration();
2818 NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
2819 return getPreviousDecl();
2822 NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
2823 return getMostRecentDecl();
2826 NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
2827 SourceLocation UsingLoc,
2828 SourceLocation AliasLoc,
2829 IdentifierInfo *Alias,
2830 NestedNameSpecifierLoc QualifierLoc,
2831 SourceLocation IdentLoc,
2832 NamedDecl *Namespace) {
2833 // FIXME: Preserve the aliased namespace as written.
2834 if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
2835 Namespace = NS->getOriginalNamespace();
2836 return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
2837 QualifierLoc, IdentLoc, Namespace);
2840 NamespaceAliasDecl *
2841 NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2842 return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
2843 SourceLocation(), nullptr,
2844 NestedNameSpecifierLoc(),
2845 SourceLocation(), nullptr);
2848 void LifetimeExtendedTemporaryDecl::anchor() {}
2850 /// Retrieve the storage duration for the materialized temporary.
2851 StorageDuration LifetimeExtendedTemporaryDecl::getStorageDuration() const {
2852 const ValueDecl *ExtendingDecl = getExtendingDecl();
2854 return SD_FullExpression;
2855 // FIXME: This is not necessarily correct for a temporary materialized
2856 // within a default initializer.
2857 if (isa<FieldDecl>(ExtendingDecl))
2858 return SD_Automatic;
2859 // FIXME: This only works because storage class specifiers are not allowed
2860 // on decomposition declarations.
2861 if (isa<BindingDecl>(ExtendingDecl))
2862 return ExtendingDecl->getDeclContext()->isFunctionOrMethod() ? SD_Automatic
2864 return cast<VarDecl>(ExtendingDecl)->getStorageDuration();
2867 APValue *LifetimeExtendedTemporaryDecl::getOrCreateValue(bool MayCreate) const {
2868 assert(getStorageDuration() == SD_Static &&
2869 "don't need to cache the computed value for this temporary");
2870 if (MayCreate && !Value) {
2871 Value = (new (getASTContext()) APValue);
2872 getASTContext().addDestruction(Value);
2874 assert(Value && "may not be null");
2878 void UsingShadowDecl::anchor() {}
2880 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
2881 SourceLocation Loc, UsingDecl *Using,
2883 : NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
2884 redeclarable_base(C), UsingOrNextShadow(cast<NamedDecl>(Using)) {
2886 setTargetDecl(Target);
2890 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
2891 : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
2892 redeclarable_base(C) {}
2895 UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2896 return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2899 UsingDecl *UsingShadowDecl::getUsingDecl() const {
2900 const UsingShadowDecl *Shadow = this;
2901 while (const auto *NextShadow =
2902 dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
2903 Shadow = NextShadow;
2904 return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2907 void ConstructorUsingShadowDecl::anchor() {}
2909 ConstructorUsingShadowDecl *
2910 ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
2911 SourceLocation Loc, UsingDecl *Using,
2912 NamedDecl *Target, bool IsVirtual) {
2913 return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
2917 ConstructorUsingShadowDecl *
2918 ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2919 return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2922 CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
2923 return getUsingDecl()->getQualifier()->getAsRecordDecl();
2926 void UsingDecl::anchor() {}
2928 void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
2929 assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
2930 "declaration already in set");
2931 assert(S->getUsingDecl() == this);
2933 if (FirstUsingShadow.getPointer())
2934 S->UsingOrNextShadow = FirstUsingShadow.getPointer();
2935 FirstUsingShadow.setPointer(S);
2938 void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
2939 assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
2940 "declaration not in set");
2941 assert(S->getUsingDecl() == this);
2943 // Remove S from the shadow decl chain. This is O(n) but hopefully rare.
2945 if (FirstUsingShadow.getPointer() == S) {
2946 FirstUsingShadow.setPointer(
2947 dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
2948 S->UsingOrNextShadow = this;
2952 UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
2953 while (Prev->UsingOrNextShadow != S)
2954 Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
2955 Prev->UsingOrNextShadow = S->UsingOrNextShadow;
2956 S->UsingOrNextShadow = this;
2959 UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
2960 NestedNameSpecifierLoc QualifierLoc,
2961 const DeclarationNameInfo &NameInfo,
2963 return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
2966 UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2967 return new (C, ID) UsingDecl(nullptr, SourceLocation(),
2968 NestedNameSpecifierLoc(), DeclarationNameInfo(),
2972 SourceRange UsingDecl::getSourceRange() const {
2973 SourceLocation Begin = isAccessDeclaration()
2974 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2975 return SourceRange(Begin, getNameInfo().getEndLoc());
2978 void UsingPackDecl::anchor() {}
2980 UsingPackDecl *UsingPackDecl::Create(ASTContext &C, DeclContext *DC,
2981 NamedDecl *InstantiatedFrom,
2982 ArrayRef<NamedDecl *> UsingDecls) {
2983 size_t Extra = additionalSizeToAlloc<NamedDecl *>(UsingDecls.size());
2984 return new (C, DC, Extra) UsingPackDecl(DC, InstantiatedFrom, UsingDecls);
2987 UsingPackDecl *UsingPackDecl::CreateDeserialized(ASTContext &C, unsigned ID,
2988 unsigned NumExpansions) {
2989 size_t Extra = additionalSizeToAlloc<NamedDecl *>(NumExpansions);
2990 auto *Result = new (C, ID, Extra) UsingPackDecl(nullptr, nullptr, None);
2991 Result->NumExpansions = NumExpansions;
2992 auto *Trail = Result->getTrailingObjects<NamedDecl *>();
2993 for (unsigned I = 0; I != NumExpansions; ++I)
2994 new (Trail + I) NamedDecl*(nullptr);
2998 void UnresolvedUsingValueDecl::anchor() {}
3000 UnresolvedUsingValueDecl *
3001 UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
3002 SourceLocation UsingLoc,
3003 NestedNameSpecifierLoc QualifierLoc,
3004 const DeclarationNameInfo &NameInfo,
3005 SourceLocation EllipsisLoc) {
3006 return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
3007 QualifierLoc, NameInfo,
3011 UnresolvedUsingValueDecl *
3012 UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3013 return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
3015 NestedNameSpecifierLoc(),
3016 DeclarationNameInfo(),
3020 SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
3021 SourceLocation Begin = isAccessDeclaration()
3022 ? getQualifierLoc().getBeginLoc() : UsingLocation;
3023 return SourceRange(Begin, getNameInfo().getEndLoc());
3026 void UnresolvedUsingTypenameDecl::anchor() {}
3028 UnresolvedUsingTypenameDecl *
3029 UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
3030 SourceLocation UsingLoc,
3031 SourceLocation TypenameLoc,
3032 NestedNameSpecifierLoc QualifierLoc,
3033 SourceLocation TargetNameLoc,
3034 DeclarationName TargetName,
3035 SourceLocation EllipsisLoc) {
3036 return new (C, DC) UnresolvedUsingTypenameDecl(
3037 DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
3038 TargetName.getAsIdentifierInfo(), EllipsisLoc);
3041 UnresolvedUsingTypenameDecl *
3042 UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3043 return new (C, ID) UnresolvedUsingTypenameDecl(
3044 nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
3045 SourceLocation(), nullptr, SourceLocation());
3048 void StaticAssertDecl::anchor() {}
3050 StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
3051 SourceLocation StaticAssertLoc,
3053 StringLiteral *Message,
3054 SourceLocation RParenLoc,
3056 return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
3060 StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
3062 return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
3063 nullptr, SourceLocation(), false);
3066 void BindingDecl::anchor() {}
3068 BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
3069 SourceLocation IdLoc, IdentifierInfo *Id) {
3070 return new (C, DC) BindingDecl(DC, IdLoc, Id);
3073 BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3074 return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
3077 ValueDecl *BindingDecl::getDecomposedDecl() const {
3078 ExternalASTSource *Source =
3079 Decomp.isOffset() ? getASTContext().getExternalSource() : nullptr;
3080 return cast_or_null<ValueDecl>(Decomp.get(Source));
3083 VarDecl *BindingDecl::getHoldingVar() const {
3084 Expr *B = getBinding();
3087 auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
3091 auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
3092 assert(VD->isImplicit() && "holding var for binding decl not implicit");
3096 void DecompositionDecl::anchor() {}
3098 DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
3099 SourceLocation StartLoc,
3100 SourceLocation LSquareLoc,
3101 QualType T, TypeSourceInfo *TInfo,
3103 ArrayRef<BindingDecl *> Bindings) {
3104 size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
3105 return new (C, DC, Extra)
3106 DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
3109 DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
3111 unsigned NumBindings) {
3112 size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
3113 auto *Result = new (C, ID, Extra)
3114 DecompositionDecl(C, nullptr, SourceLocation(), SourceLocation(),
3115 QualType(), nullptr, StorageClass(), None);
3116 // Set up and clean out the bindings array.
3117 Result->NumBindings = NumBindings;
3118 auto *Trail = Result->getTrailingObjects<BindingDecl *>();
3119 for (unsigned I = 0; I != NumBindings; ++I)
3120 new (Trail + I) BindingDecl*(nullptr);
3124 void DecompositionDecl::printName(llvm::raw_ostream &os) const {
3127 for (const auto *B : bindings()) {
3136 void MSPropertyDecl::anchor() {}
3138 MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
3139 SourceLocation L, DeclarationName N,
3140 QualType T, TypeSourceInfo *TInfo,
3141 SourceLocation StartL,
3142 IdentifierInfo *Getter,
3143 IdentifierInfo *Setter) {
3144 return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
3147 MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
3149 return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
3150 DeclarationName(), QualType(), nullptr,
3151 SourceLocation(), nullptr, nullptr);
3154 static const char *getAccessName(AccessSpecifier AS) {
3157 llvm_unreachable("Invalid access specifier!");
3165 llvm_unreachable("Invalid access specifier!");
3168 const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
3169 AccessSpecifier AS) {
3170 return DB << getAccessName(AS);
3173 const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
3174 AccessSpecifier AS) {
3175 return DB << getAccessName(AS);