1 //===- DeclCXX.cpp - C++ Declaration AST Node Implementation --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the C++ related Decl classes.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/DeclCXX.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/ASTLambda.h"
17 #include "clang/AST/ASTMutationListener.h"
18 #include "clang/AST/ASTUnresolvedSet.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), HasNoNonEmptyBases(true),
78 HasPrivateFields(false), HasProtectedFields(false),
79 HasPublicFields(false), HasMutableFields(false), HasVariantMembers(false),
80 HasOnlyCMembers(true), HasInClassInitializer(false),
81 HasUninitializedReferenceMember(false), HasUninitializedFields(false),
82 HasInheritedConstructor(false), HasInheritedAssignment(false),
83 NeedOverloadResolutionForCopyConstructor(false),
84 NeedOverloadResolutionForMoveConstructor(false),
85 NeedOverloadResolutionForMoveAssignment(false),
86 NeedOverloadResolutionForDestructor(false),
87 DefaultedCopyConstructorIsDeleted(false),
88 DefaultedMoveConstructorIsDeleted(false),
89 DefaultedMoveAssignmentIsDeleted(false),
90 DefaultedDestructorIsDeleted(false), HasTrivialSpecialMembers(SMF_All),
91 DeclaredNonTrivialSpecialMembers(0), HasIrrelevantDestructor(true),
92 HasConstexprNonCopyMoveConstructor(false),
93 HasDefaultedDefaultConstructor(false),
94 CanPassInRegisters(true),
95 DefaultedDefaultConstructorIsConstexpr(true),
96 HasConstexprDefaultConstructor(false),
97 HasNonLiteralTypeFieldsOrBases(false), ComputedVisibleConversions(false),
98 UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
99 ImplicitCopyConstructorCanHaveConstParamForVBase(true),
100 ImplicitCopyConstructorCanHaveConstParamForNonVBase(true),
101 ImplicitCopyAssignmentHasConstParam(true),
102 HasDeclaredCopyConstructorWithConstParam(false),
103 HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
104 IsParsingBaseSpecifiers(false), HasODRHash(false), Definition(D) {}
106 CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
107 return Bases.get(Definition->getASTContext().getExternalSource());
110 CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
111 return VBases.get(Definition->getASTContext().getExternalSource());
114 CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
115 DeclContext *DC, SourceLocation StartLoc,
116 SourceLocation IdLoc, IdentifierInfo *Id,
117 CXXRecordDecl *PrevDecl)
118 : RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
119 DefinitionData(PrevDecl ? PrevDecl->DefinitionData
122 CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
123 DeclContext *DC, SourceLocation StartLoc,
124 SourceLocation IdLoc, IdentifierInfo *Id,
125 CXXRecordDecl *PrevDecl,
126 bool DelayTypeCreation) {
127 CXXRecordDecl *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc,
128 IdLoc, Id, PrevDecl);
129 R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
131 // FIXME: DelayTypeCreation seems like such a hack
132 if (!DelayTypeCreation)
133 C.getTypeDeclType(R, PrevDecl);
138 CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
139 TypeSourceInfo *Info, SourceLocation Loc,
140 bool Dependent, bool IsGeneric,
141 LambdaCaptureDefault CaptureDefault) {
143 new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
145 R->IsBeingDefined = true;
147 new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
149 R->MayHaveOutOfDateDef = false;
150 R->setImplicit(true);
151 C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
156 CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
157 CXXRecordDecl *R = new (C, ID) CXXRecordDecl(
158 CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
160 R->MayHaveOutOfDateDef = false;
165 CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
167 ASTContext &C = getASTContext();
169 if (!data().Bases.isOffset() && data().NumBases > 0)
170 C.Deallocate(data().getBases());
173 if (!C.getLangOpts().CPlusPlus17) {
174 // C++ [dcl.init.aggr]p1:
175 // An aggregate is [...] a class with [...] no base classes [...].
176 data().Aggregate = false;
180 // A POD-struct is an aggregate class...
181 data().PlainOldData = false;
184 // The set of seen virtual base types.
185 llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
187 // The virtual bases of this class.
188 SmallVector<const CXXBaseSpecifier *, 8> VBases;
190 data().Bases = new(C) CXXBaseSpecifier [NumBases];
191 data().NumBases = NumBases;
192 for (unsigned i = 0; i < NumBases; ++i) {
193 data().getBases()[i] = *Bases[i];
194 // Keep track of inherited vbases for this base class.
195 const CXXBaseSpecifier *Base = Bases[i];
196 QualType BaseType = Base->getType();
197 // Skip dependent types; we can't do any checking on them now.
198 if (BaseType->isDependentType())
200 CXXRecordDecl *BaseClassDecl
201 = cast<CXXRecordDecl>(BaseType->getAs<RecordType>()->getDecl());
203 if (!BaseClassDecl->isEmpty()) {
206 // A standard-layout class is a class that:
208 // -- either has no non-static data members in the most derived
209 // class and at most one base class with non-static data members,
210 // or has no base classes with non-static data members, and
211 // If this is the second non-empty base, then neither of these two
212 // clauses can be true.
213 data().IsStandardLayout = false;
216 // C++14 [meta.unary.prop]p4:
217 // T is a class type [...] with [...] no base class B for which
218 // is_empty<B>::value is false.
219 data().Empty = false;
220 data().HasNoNonEmptyBases = false;
223 // C++1z [dcl.init.agg]p1:
224 // An aggregate is a class with [...] no private or protected base classes
225 if (Base->getAccessSpecifier() != AS_public)
226 data().Aggregate = false;
228 // C++ [class.virtual]p1:
229 // A class that declares or inherits a virtual function is called a
230 // polymorphic class.
231 if (BaseClassDecl->isPolymorphic())
232 data().Polymorphic = true;
235 // A standard-layout class is a class that: [...]
236 // -- has no non-standard-layout base classes
237 if (!BaseClassDecl->isStandardLayout())
238 data().IsStandardLayout = false;
240 // Record if this base is the first non-literal field or base.
241 if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
242 data().HasNonLiteralTypeFieldsOrBases = true;
244 // Now go through all virtual bases of this base and add them.
245 for (const auto &VBase : BaseClassDecl->vbases()) {
246 // Add this base if it's not already in the list.
247 if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
248 VBases.push_back(&VBase);
250 // C++11 [class.copy]p8:
251 // The implicitly-declared copy constructor for a class X will have
252 // the form 'X::X(const X&)' if each [...] virtual base class B of X
253 // has a copy constructor whose first parameter is of type
254 // 'const B&' or 'const volatile B&' [...]
255 if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
256 if (!VBaseDecl->hasCopyConstructorWithConstParam())
257 data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
259 // C++1z [dcl.init.agg]p1:
260 // An aggregate is a class with [...] no virtual base classes
261 data().Aggregate = false;
265 if (Base->isVirtual()) {
266 // Add this base if it's not already in the list.
267 if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
268 VBases.push_back(Base);
270 // C++14 [meta.unary.prop] is_empty:
271 // T is a class type, but not a union type, with ... no virtual base
273 data().Empty = false;
275 // C++1z [dcl.init.agg]p1:
276 // An aggregate is a class with [...] no virtual base classes
277 data().Aggregate = false;
279 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
280 // A [default constructor, copy/move constructor, or copy/move assignment
281 // operator for a class X] is trivial [...] if:
282 // -- class X has [...] no virtual base classes
283 data().HasTrivialSpecialMembers &= SMF_Destructor;
286 // A standard-layout class is a class that: [...]
287 // -- has [...] no virtual base classes
288 data().IsStandardLayout = false;
290 // C++11 [dcl.constexpr]p4:
291 // In the definition of a constexpr constructor [...]
292 // -- the class shall not have any virtual base classes
293 data().DefaultedDefaultConstructorIsConstexpr = false;
295 // C++1z [class.copy]p8:
296 // The implicitly-declared copy constructor for a class X will have
297 // the form 'X::X(const X&)' if each potentially constructed subobject
298 // has a copy constructor whose first parameter is of type
299 // 'const B&' or 'const volatile B&' [...]
300 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
301 data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
303 // C++ [class.ctor]p5:
304 // A default constructor is trivial [...] if:
305 // -- all the direct base classes of its class have trivial default
307 if (!BaseClassDecl->hasTrivialDefaultConstructor())
308 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
310 // C++0x [class.copy]p13:
311 // A copy/move constructor for class X is trivial if [...]
313 // -- the constructor selected to copy/move each direct base class
314 // subobject is trivial, and
315 if (!BaseClassDecl->hasTrivialCopyConstructor())
316 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
317 // If the base class doesn't have a simple move constructor, we'll eagerly
318 // declare it and perform overload resolution to determine which function
319 // it actually calls. If it does have a simple move constructor, this
321 if (!BaseClassDecl->hasTrivialMoveConstructor())
322 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
324 // C++0x [class.copy]p27:
325 // A copy/move assignment operator for class X is trivial if [...]
327 // -- the assignment operator selected to copy/move each direct base
328 // class subobject is trivial, and
329 if (!BaseClassDecl->hasTrivialCopyAssignment())
330 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
331 // If the base class doesn't have a simple move assignment, we'll eagerly
332 // declare it and perform overload resolution to determine which function
333 // it actually calls. If it does have a simple move assignment, this
335 if (!BaseClassDecl->hasTrivialMoveAssignment())
336 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
338 // C++11 [class.ctor]p6:
339 // If that user-written default constructor would satisfy the
340 // requirements of a constexpr constructor, the implicitly-defined
341 // default constructor is constexpr.
342 if (!BaseClassDecl->hasConstexprDefaultConstructor())
343 data().DefaultedDefaultConstructorIsConstexpr = false;
345 // C++1z [class.copy]p8:
346 // The implicitly-declared copy constructor for a class X will have
347 // the form 'X::X(const X&)' if each potentially constructed subobject
348 // has a copy constructor whose first parameter is of type
349 // 'const B&' or 'const volatile B&' [...]
350 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
351 data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
354 // C++ [class.ctor]p3:
355 // A destructor is trivial if all the direct base classes of its class
356 // have trivial destructors.
357 if (!BaseClassDecl->hasTrivialDestructor())
358 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
360 if (!BaseClassDecl->hasIrrelevantDestructor())
361 data().HasIrrelevantDestructor = false;
363 // C++11 [class.copy]p18:
364 // The implicitly-declared copy assignment oeprator for a class X will
365 // have the form 'X& X::operator=(const X&)' if each direct base class B
366 // of X has a copy assignment operator whose parameter is of type 'const
367 // B&', 'const volatile B&', or 'B' [...]
368 if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
369 data().ImplicitCopyAssignmentHasConstParam = false;
371 // A class has an Objective-C object member if... or any of its bases
372 // has an Objective-C object member.
373 if (BaseClassDecl->hasObjectMember())
374 setHasObjectMember(true);
376 if (BaseClassDecl->hasVolatileMember())
377 setHasVolatileMember(true);
379 // Keep track of the presence of mutable fields.
380 if (BaseClassDecl->hasMutableFields()) {
381 data().HasMutableFields = true;
382 data().NeedOverloadResolutionForCopyConstructor = true;
385 if (BaseClassDecl->hasUninitializedReferenceMember())
386 data().HasUninitializedReferenceMember = true;
388 if (!BaseClassDecl->allowConstDefaultInit())
389 data().HasUninitializedFields = true;
391 addedClassSubobject(BaseClassDecl);
394 if (VBases.empty()) {
395 data().IsParsingBaseSpecifiers = false;
399 // Create base specifier for any direct or indirect virtual bases.
400 data().VBases = new (C) CXXBaseSpecifier[VBases.size()];
401 data().NumVBases = VBases.size();
402 for (int I = 0, E = VBases.size(); I != E; ++I) {
403 QualType Type = VBases[I]->getType();
404 if (!Type->isDependentType())
405 addedClassSubobject(Type->getAsCXXRecordDecl());
406 data().getVBases()[I] = *VBases[I];
409 data().IsParsingBaseSpecifiers = false;
412 unsigned CXXRecordDecl::getODRHash() const {
413 assert(hasDefinition() && "ODRHash only for records with definitions");
415 // Previously calculated hash is stored in DefinitionData.
416 if (DefinitionData->HasODRHash)
417 return DefinitionData->ODRHash;
419 // Only calculate hash on first call of getODRHash per record.
421 Hash.AddCXXRecordDecl(getDefinition());
422 DefinitionData->HasODRHash = true;
423 DefinitionData->ODRHash = Hash.CalculateHash();
425 return DefinitionData->ODRHash;
428 void CXXRecordDecl::addedClassSubobject(CXXRecordDecl *Subobj) {
429 // C++11 [class.copy]p11:
430 // A defaulted copy/move constructor for a class X is defined as
432 // -- a direct or virtual base class B that cannot be copied/moved [...]
433 // -- a non-static data member of class type M (or array thereof)
434 // that cannot be copied or moved [...]
435 if (!Subobj->hasSimpleCopyConstructor())
436 data().NeedOverloadResolutionForCopyConstructor = true;
437 if (!Subobj->hasSimpleMoveConstructor())
438 data().NeedOverloadResolutionForMoveConstructor = true;
440 // C++11 [class.copy]p23:
441 // A defaulted copy/move assignment operator for a class X is defined as
443 // -- a direct or virtual base class B that cannot be copied/moved [...]
444 // -- a non-static data member of class type M (or array thereof)
445 // that cannot be copied or moved [...]
446 if (!Subobj->hasSimpleMoveAssignment())
447 data().NeedOverloadResolutionForMoveAssignment = true;
449 // C++11 [class.ctor]p5, C++11 [class.copy]p11, C++11 [class.dtor]p5:
450 // A defaulted [ctor or dtor] for a class X is defined as
452 // -- any direct or virtual base class [...] has a type with a destructor
453 // that is deleted or inaccessible from the defaulted [ctor or dtor].
454 // -- any non-static data member has a type with a destructor
455 // that is deleted or inaccessible from the defaulted [ctor or dtor].
456 if (!Subobj->hasSimpleDestructor()) {
457 data().NeedOverloadResolutionForCopyConstructor = true;
458 data().NeedOverloadResolutionForMoveConstructor = true;
459 data().NeedOverloadResolutionForDestructor = true;
463 bool CXXRecordDecl::hasAnyDependentBases() const {
464 if (!isDependentContext())
467 return !forallBases([](const CXXRecordDecl *) { return true; });
470 bool CXXRecordDecl::isTriviallyCopyable() const {
472 // A trivially copyable class is a class that:
473 // -- has no non-trivial copy constructors,
474 if (hasNonTrivialCopyConstructor()) return false;
475 // -- has no non-trivial move constructors,
476 if (hasNonTrivialMoveConstructor()) return false;
477 // -- has no non-trivial copy assignment operators,
478 if (hasNonTrivialCopyAssignment()) return false;
479 // -- has no non-trivial move assignment operators, and
480 if (hasNonTrivialMoveAssignment()) return false;
481 // -- has a trivial destructor.
482 if (!hasTrivialDestructor()) return false;
487 void CXXRecordDecl::markedVirtualFunctionPure() {
488 // C++ [class.abstract]p2:
489 // A class is abstract if it has at least one pure virtual function.
490 data().Abstract = true;
493 void CXXRecordDecl::addedMember(Decl *D) {
494 if (!D->isImplicit() &&
495 !isa<FieldDecl>(D) &&
496 !isa<IndirectFieldDecl>(D) &&
497 (!isa<TagDecl>(D) || cast<TagDecl>(D)->getTagKind() == TTK_Class ||
498 cast<TagDecl>(D)->getTagKind() == TTK_Interface))
499 data().HasOnlyCMembers = false;
501 // Ignore friends and invalid declarations.
502 if (D->getFriendObjectKind() || D->isInvalidDecl())
505 FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D);
507 D = FunTmpl->getTemplatedDecl();
509 // FIXME: Pass NamedDecl* to addedMember?
510 Decl *DUnderlying = D;
511 if (auto *ND = dyn_cast<NamedDecl>(DUnderlying)) {
512 DUnderlying = ND->getUnderlyingDecl();
513 if (FunctionTemplateDecl *UnderlyingFunTmpl =
514 dyn_cast<FunctionTemplateDecl>(DUnderlying))
515 DUnderlying = UnderlyingFunTmpl->getTemplatedDecl();
518 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
519 if (Method->isVirtual()) {
520 // C++ [dcl.init.aggr]p1:
521 // An aggregate is an array or a class with [...] no virtual functions.
522 data().Aggregate = false;
525 // A POD-struct is an aggregate class...
526 data().PlainOldData = false;
528 // C++14 [meta.unary.prop]p4:
529 // T is a class type [...] with [...] no virtual member functions...
530 data().Empty = false;
532 // C++ [class.virtual]p1:
533 // A class that declares or inherits a virtual function is called a
534 // polymorphic class.
535 data().Polymorphic = true;
537 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
538 // A [default constructor, copy/move constructor, or copy/move
539 // assignment operator for a class X] is trivial [...] if:
540 // -- class X has no virtual functions [...]
541 data().HasTrivialSpecialMembers &= SMF_Destructor;
544 // A standard-layout class is a class that: [...]
545 // -- has no virtual functions
546 data().IsStandardLayout = false;
550 // Notify the listener if an implicit member was added after the definition
552 if (!isBeingDefined() && D->isImplicit())
553 if (ASTMutationListener *L = getASTMutationListener())
554 L->AddedCXXImplicitMember(data().Definition, D);
556 // The kind of special member this declaration is, if any.
559 // Handle constructors.
560 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
561 if (!Constructor->isImplicit()) {
562 // Note that we have a user-declared constructor.
563 data().UserDeclaredConstructor = true;
566 // A POD-struct is an aggregate class [...]
567 // Since the POD bit is meant to be C++03 POD-ness, clear it even if the
568 // type is technically an aggregate in C++0x since it wouldn't be in 03.
569 data().PlainOldData = false;
572 if (Constructor->isDefaultConstructor()) {
573 SMKind |= SMF_DefaultConstructor;
575 if (Constructor->isUserProvided())
576 data().UserProvidedDefaultConstructor = true;
577 if (Constructor->isConstexpr())
578 data().HasConstexprDefaultConstructor = true;
579 if (Constructor->isDefaulted())
580 data().HasDefaultedDefaultConstructor = true;
585 if (Constructor->isCopyConstructor(Quals)) {
586 SMKind |= SMF_CopyConstructor;
588 if (Quals & Qualifiers::Const)
589 data().HasDeclaredCopyConstructorWithConstParam = true;
590 } else if (Constructor->isMoveConstructor())
591 SMKind |= SMF_MoveConstructor;
594 // C++11 [dcl.init.aggr]p1: DR1518
595 // An aggregate is an array or a class with no user-provided, explicit, or
596 // inherited constructors
597 if (Constructor->isUserProvided() || Constructor->isExplicit())
598 data().Aggregate = false;
601 // Handle constructors, including those inherited from base classes.
602 if (CXXConstructorDecl *Constructor =
603 dyn_cast<CXXConstructorDecl>(DUnderlying)) {
604 // Record if we see any constexpr constructors which are neither copy
605 // nor move constructors.
606 // C++1z [basic.types]p10:
607 // [...] has at least one constexpr constructor or constructor template
608 // (possibly inherited from a base class) that is not a copy or move
610 if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
611 data().HasConstexprNonCopyMoveConstructor = true;
614 // Handle destructors.
615 if (CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) {
616 SMKind |= SMF_Destructor;
618 if (DD->isUserProvided())
619 data().HasIrrelevantDestructor = false;
620 // If the destructor is explicitly defaulted and not trivial or not public
621 // or if the destructor is deleted, we clear HasIrrelevantDestructor in
622 // finishedDefaultedOrDeletedMember.
624 // C++11 [class.dtor]p5:
625 // A destructor is trivial if [...] the destructor is not virtual.
627 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
630 // Handle member functions.
631 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
632 if (Method->isCopyAssignmentOperator()) {
633 SMKind |= SMF_CopyAssignment;
635 const ReferenceType *ParamTy =
636 Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
637 if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
638 data().HasDeclaredCopyAssignmentWithConstParam = true;
641 if (Method->isMoveAssignmentOperator())
642 SMKind |= SMF_MoveAssignment;
644 // Keep the list of conversion functions up-to-date.
645 if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
646 // FIXME: We use the 'unsafe' accessor for the access specifier here,
647 // because Sema may not have set it yet. That's really just a misdesign
648 // in Sema. However, LLDB *will* have set the access specifier correctly,
649 // and adds declarations after the class is technically completed,
650 // so completeDefinition()'s overriding of the access specifiers doesn't
652 AccessSpecifier AS = Conversion->getAccessUnsafe();
654 if (Conversion->getPrimaryTemplate()) {
655 // We don't record specializations.
657 ASTContext &Ctx = getASTContext();
658 ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
660 FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
661 if (Primary->getPreviousDecl())
662 Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
665 Conversions.addDecl(Ctx, Primary, AS);
670 // If this is the first declaration of a special member, we no longer have
671 // an implicit trivial special member.
672 data().HasTrivialSpecialMembers &=
673 data().DeclaredSpecialMembers | ~SMKind;
675 if (!Method->isImplicit() && !Method->isUserProvided()) {
676 // This method is user-declared but not user-provided. We can't work out
677 // whether it's trivial yet (not until we get to the end of the class).
678 // We'll handle this method in finishedDefaultedOrDeletedMember.
679 } else if (Method->isTrivial())
680 data().HasTrivialSpecialMembers |= SMKind;
682 data().DeclaredNonTrivialSpecialMembers |= SMKind;
684 // Note when we have declared a declared special member, and suppress the
685 // implicit declaration of this special member.
686 data().DeclaredSpecialMembers |= SMKind;
688 if (!Method->isImplicit()) {
689 data().UserDeclaredSpecialMembers |= SMKind;
692 // A POD-struct is an aggregate class that has [...] no user-defined
693 // copy assignment operator and no user-defined destructor.
695 // Since the POD bit is meant to be C++03 POD-ness, and in C++03,
696 // aggregates could not have any constructors, clear it even for an
697 // explicitly defaulted or deleted constructor.
698 // type is technically an aggregate in C++0x since it wouldn't be in 03.
700 // Also, a user-declared move assignment operator makes a class non-POD.
701 // This is an extension in C++03.
702 data().PlainOldData = false;
709 // Handle non-static data members.
710 if (FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
711 // C++ [class.bit]p2:
712 // A declaration for a bit-field that omits the identifier declares an
713 // unnamed bit-field. Unnamed bit-fields are not members and cannot be
715 if (Field->isUnnamedBitfield())
718 // C++ [dcl.init.aggr]p1:
719 // An aggregate is an array or a class (clause 9) with [...] no
720 // private or protected non-static data members (clause 11).
722 // A POD must be an aggregate.
723 if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
724 data().Aggregate = false;
725 data().PlainOldData = false;
729 // A standard-layout class is a class that:
731 // -- has the same access control for all non-static data members,
732 switch (D->getAccess()) {
733 case AS_private: data().HasPrivateFields = true; break;
734 case AS_protected: data().HasProtectedFields = true; break;
735 case AS_public: data().HasPublicFields = true; break;
736 case AS_none: llvm_unreachable("Invalid access specifier");
738 if ((data().HasPrivateFields + data().HasProtectedFields +
739 data().HasPublicFields) > 1)
740 data().IsStandardLayout = false;
742 // Keep track of the presence of mutable fields.
743 if (Field->isMutable()) {
744 data().HasMutableFields = true;
745 data().NeedOverloadResolutionForCopyConstructor = true;
748 // C++11 [class.union]p8, DR1460:
749 // If X is a union, a non-static data member of X that is not an anonymous
750 // union is a variant member of X.
751 if (isUnion() && !Field->isAnonymousStructOrUnion())
752 data().HasVariantMembers = true;
755 // A POD struct is a class that is both a trivial class and a
756 // standard-layout class, and has no non-static data members of type
757 // non-POD struct, non-POD union (or array of such types).
759 // Automatic Reference Counting: the presence of a member of Objective-C pointer type
760 // that does not explicitly have no lifetime makes the class a non-POD.
761 ASTContext &Context = getASTContext();
762 QualType T = Context.getBaseElementType(Field->getType());
763 if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
764 if (T.hasNonTrivialObjCLifetime()) {
765 // Objective-C Automatic Reference Counting:
766 // If a class has a non-static data member of Objective-C pointer
767 // type (or array thereof), it is a non-POD type and its
768 // default constructor (if any), copy constructor, move constructor,
769 // copy assignment operator, move assignment operator, and destructor are
771 setHasObjectMember(true);
772 struct DefinitionData &Data = data();
773 Data.PlainOldData = false;
774 Data.HasTrivialSpecialMembers = 0;
775 Data.HasIrrelevantDestructor = false;
776 } else if (!Context.getLangOpts().ObjCAutoRefCount) {
777 setHasObjectMember(true);
779 } else if (!T.isCXX98PODType(Context))
780 data().PlainOldData = false;
782 if (T->isReferenceType()) {
783 if (!Field->hasInClassInitializer())
784 data().HasUninitializedReferenceMember = true;
787 // A standard-layout class is a class that:
788 // -- has no non-static data members of type [...] reference,
789 data().IsStandardLayout = false;
791 // C++1z [class.copy.ctor]p10:
792 // A defaulted copy constructor for a class X is defined as deleted if X has:
793 // -- a non-static data member of rvalue reference type
794 if (T->isRValueReferenceType())
795 data().DefaultedCopyConstructorIsDeleted = true;
798 if (!Field->hasInClassInitializer() && !Field->isMutable()) {
799 if (CXXRecordDecl *FieldType = T->getAsCXXRecordDecl()) {
800 if (FieldType->hasDefinition() && !FieldType->allowConstDefaultInit())
801 data().HasUninitializedFields = true;
803 data().HasUninitializedFields = true;
807 // Record if this field is the first non-literal or volatile field or base.
808 if (!T->isLiteralType(Context) || T.isVolatileQualified())
809 data().HasNonLiteralTypeFieldsOrBases = true;
811 if (Field->hasInClassInitializer() ||
812 (Field->isAnonymousStructOrUnion() &&
813 Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
814 data().HasInClassInitializer = true;
817 // A default constructor is trivial if [...] no non-static data member
818 // of its class has a brace-or-equal-initializer.
819 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
821 // C++11 [dcl.init.aggr]p1:
822 // An aggregate is a [...] class with [...] no
823 // brace-or-equal-initializers for non-static data members.
825 // This rule was removed in C++14.
826 if (!getASTContext().getLangOpts().CPlusPlus14)
827 data().Aggregate = false;
830 // A POD struct is [...] a trivial class.
831 data().PlainOldData = false;
834 // C++11 [class.copy]p23:
835 // A defaulted copy/move assignment operator for a class X is defined
836 // as deleted if X has:
837 // -- a non-static data member of reference type
838 if (T->isReferenceType())
839 data().DefaultedMoveAssignmentIsDeleted = true;
841 if (const RecordType *RecordTy = T->getAs<RecordType>()) {
842 CXXRecordDecl* FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
843 if (FieldRec->getDefinition()) {
844 addedClassSubobject(FieldRec);
846 // We may need to perform overload resolution to determine whether a
847 // field can be moved if it's const or volatile qualified.
848 if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
849 // We need to care about 'const' for the copy constructor because an
850 // implicit copy constructor might be declared with a non-const
852 data().NeedOverloadResolutionForCopyConstructor = true;
853 data().NeedOverloadResolutionForMoveConstructor = true;
854 data().NeedOverloadResolutionForMoveAssignment = true;
857 // C++11 [class.ctor]p5, C++11 [class.copy]p11:
858 // A defaulted [special member] for a class X is defined as
860 // -- X is a union-like class that has a variant member with a
861 // non-trivial [corresponding special member]
863 if (FieldRec->hasNonTrivialCopyConstructor())
864 data().DefaultedCopyConstructorIsDeleted = true;
865 if (FieldRec->hasNonTrivialMoveConstructor())
866 data().DefaultedMoveConstructorIsDeleted = true;
867 if (FieldRec->hasNonTrivialMoveAssignment())
868 data().DefaultedMoveAssignmentIsDeleted = true;
869 if (FieldRec->hasNonTrivialDestructor())
870 data().DefaultedDestructorIsDeleted = true;
873 // For an anonymous union member, our overload resolution will perform
874 // overload resolution for its members.
875 if (Field->isAnonymousStructOrUnion()) {
876 data().NeedOverloadResolutionForCopyConstructor |=
877 FieldRec->data().NeedOverloadResolutionForCopyConstructor;
878 data().NeedOverloadResolutionForMoveConstructor |=
879 FieldRec->data().NeedOverloadResolutionForMoveConstructor;
880 data().NeedOverloadResolutionForMoveAssignment |=
881 FieldRec->data().NeedOverloadResolutionForMoveAssignment;
882 data().NeedOverloadResolutionForDestructor |=
883 FieldRec->data().NeedOverloadResolutionForDestructor;
886 // C++0x [class.ctor]p5:
887 // A default constructor is trivial [...] if:
888 // -- for all the non-static data members of its class that are of
889 // class type (or array thereof), each such class has a trivial
890 // default constructor.
891 if (!FieldRec->hasTrivialDefaultConstructor())
892 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
894 // C++0x [class.copy]p13:
895 // A copy/move constructor for class X is trivial if [...]
897 // -- for each non-static data member of X that is of class type (or
898 // an array thereof), the constructor selected to copy/move that
899 // member is trivial;
900 if (!FieldRec->hasTrivialCopyConstructor())
901 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
902 // If the field doesn't have a simple move constructor, we'll eagerly
903 // declare the move constructor for this class and we'll decide whether
904 // it's trivial then.
905 if (!FieldRec->hasTrivialMoveConstructor())
906 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
908 // C++0x [class.copy]p27:
909 // A copy/move assignment operator for class X is trivial if [...]
911 // -- for each non-static data member of X that is of class type (or
912 // an array thereof), the assignment operator selected to
913 // copy/move that member is trivial;
914 if (!FieldRec->hasTrivialCopyAssignment())
915 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
916 // If the field doesn't have a simple move assignment, we'll eagerly
917 // declare the move assignment for this class and we'll decide whether
918 // it's trivial then.
919 if (!FieldRec->hasTrivialMoveAssignment())
920 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
922 if (!FieldRec->hasTrivialDestructor())
923 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
924 if (!FieldRec->hasIrrelevantDestructor())
925 data().HasIrrelevantDestructor = false;
926 if (FieldRec->hasObjectMember())
927 setHasObjectMember(true);
928 if (FieldRec->hasVolatileMember())
929 setHasVolatileMember(true);
932 // A standard-layout class is a class that:
933 // -- has no non-static data members of type non-standard-layout
934 // class (or array of such types) [...]
935 if (!FieldRec->isStandardLayout())
936 data().IsStandardLayout = false;
939 // A standard-layout class is a class that:
941 // -- has no base classes of the same type as the first non-static
943 // We don't want to expend bits in the state of the record decl
944 // tracking whether this is the first non-static data member so we
945 // cheat a bit and use some of the existing state: the empty bit.
946 // Virtual bases and virtual methods make a class non-empty, but they
947 // also make it non-standard-layout so we needn't check here.
948 // A non-empty base class may leave the class standard-layout, but not
949 // if we have arrived here, and have at least one non-static data
950 // member. If IsStandardLayout remains true, then the first non-static
951 // data member must come through here with Empty still true, and Empty
952 // will subsequently be set to false below.
953 if (data().IsStandardLayout && data().Empty) {
954 for (const auto &BI : bases()) {
955 if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
956 data().IsStandardLayout = false;
962 // Keep track of the presence of mutable fields.
963 if (FieldRec->hasMutableFields()) {
964 data().HasMutableFields = true;
965 data().NeedOverloadResolutionForCopyConstructor = true;
968 // C++11 [class.copy]p13:
969 // If the implicitly-defined constructor would satisfy the
970 // requirements of a constexpr constructor, the implicitly-defined
971 // constructor is constexpr.
972 // C++11 [dcl.constexpr]p4:
973 // -- every constructor involved in initializing non-static data
974 // members [...] shall be a constexpr constructor
975 if (!Field->hasInClassInitializer() &&
976 !FieldRec->hasConstexprDefaultConstructor() && !isUnion())
977 // The standard requires any in-class initializer to be a constant
978 // expression. We consider this to be a defect.
979 data().DefaultedDefaultConstructorIsConstexpr = false;
981 // C++11 [class.copy]p8:
982 // The implicitly-declared copy constructor for a class X will have
983 // the form 'X::X(const X&)' if each potentially constructed subobject
984 // of a class type M (or array thereof) has a copy constructor whose
985 // first parameter is of type 'const M&' or 'const volatile M&'.
986 if (!FieldRec->hasCopyConstructorWithConstParam())
987 data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
989 // C++11 [class.copy]p18:
990 // The implicitly-declared copy assignment oeprator for a class X will
991 // have the form 'X& X::operator=(const X&)' if [...] for all the
992 // non-static data members of X that are of a class type M (or array
993 // thereof), each such class type has a copy assignment operator whose
994 // parameter is of type 'const M&', 'const volatile M&' or 'M'.
995 if (!FieldRec->hasCopyAssignmentWithConstParam())
996 data().ImplicitCopyAssignmentHasConstParam = false;
998 if (FieldRec->hasUninitializedReferenceMember() &&
999 !Field->hasInClassInitializer())
1000 data().HasUninitializedReferenceMember = true;
1002 // C++11 [class.union]p8, DR1460:
1003 // a non-static data member of an anonymous union that is a member of
1004 // X is also a variant member of X.
1005 if (FieldRec->hasVariantMembers() &&
1006 Field->isAnonymousStructOrUnion())
1007 data().HasVariantMembers = true;
1010 // Base element type of field is a non-class type.
1011 if (!T->isLiteralType(Context) ||
1012 (!Field->hasInClassInitializer() && !isUnion()))
1013 data().DefaultedDefaultConstructorIsConstexpr = false;
1015 // C++11 [class.copy]p23:
1016 // A defaulted copy/move assignment operator for a class X is defined
1017 // as deleted if X has:
1018 // -- a non-static data member of const non-class type (or array
1020 if (T.isConstQualified())
1021 data().DefaultedMoveAssignmentIsDeleted = true;
1025 // A standard-layout class is a class that:
1027 // -- either has no non-static data members in the most derived
1028 // class and at most one base class with non-static data members,
1029 // or has no base classes with non-static data members, and
1030 // At this point we know that we have a non-static data member, so the last
1032 if (!data().HasNoNonEmptyBases)
1033 data().IsStandardLayout = false;
1035 // C++14 [meta.unary.prop]p4:
1036 // T is a class type [...] with [...] no non-static data members other
1037 // than bit-fields of length 0...
1039 if (!Field->isBitField() ||
1040 (!Field->getBitWidth()->isTypeDependent() &&
1041 !Field->getBitWidth()->isValueDependent() &&
1042 Field->getBitWidthValue(Context) != 0))
1043 data().Empty = false;
1047 // Handle using declarations of conversion functions.
1048 if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(D)) {
1049 if (Shadow->getDeclName().getNameKind()
1050 == DeclarationName::CXXConversionFunctionName) {
1051 ASTContext &Ctx = getASTContext();
1052 data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
1056 if (UsingDecl *Using = dyn_cast<UsingDecl>(D)) {
1057 if (Using->getDeclName().getNameKind() ==
1058 DeclarationName::CXXConstructorName) {
1059 data().HasInheritedConstructor = true;
1060 // C++1z [dcl.init.aggr]p1:
1061 // An aggregate is [...] a class [...] with no inherited constructors
1062 data().Aggregate = false;
1065 if (Using->getDeclName().getCXXOverloadedOperator() == OO_Equal)
1066 data().HasInheritedAssignment = true;
1070 void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
1071 assert(!D->isImplicit() && !D->isUserProvided());
1073 // The kind of special member this declaration is, if any.
1074 unsigned SMKind = 0;
1076 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1077 if (Constructor->isDefaultConstructor()) {
1078 SMKind |= SMF_DefaultConstructor;
1079 if (Constructor->isConstexpr())
1080 data().HasConstexprDefaultConstructor = true;
1082 if (Constructor->isCopyConstructor())
1083 SMKind |= SMF_CopyConstructor;
1084 else if (Constructor->isMoveConstructor())
1085 SMKind |= SMF_MoveConstructor;
1086 else if (Constructor->isConstexpr())
1087 // We may now know that the constructor is constexpr.
1088 data().HasConstexprNonCopyMoveConstructor = true;
1089 } else if (isa<CXXDestructorDecl>(D)) {
1090 SMKind |= SMF_Destructor;
1091 if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
1092 data().HasIrrelevantDestructor = false;
1093 } else if (D->isCopyAssignmentOperator())
1094 SMKind |= SMF_CopyAssignment;
1095 else if (D->isMoveAssignmentOperator())
1096 SMKind |= SMF_MoveAssignment;
1098 // Update which trivial / non-trivial special members we have.
1099 // addedMember will have skipped this step for this member.
1101 data().HasTrivialSpecialMembers |= SMKind;
1103 data().DeclaredNonTrivialSpecialMembers |= SMKind;
1106 bool CXXRecordDecl::isCLike() const {
1107 if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
1108 !TemplateOrInstantiation.isNull())
1110 if (!hasDefinition())
1113 return isPOD() && data().HasOnlyCMembers;
1116 bool CXXRecordDecl::isGenericLambda() const {
1117 if (!isLambda()) return false;
1118 return getLambdaData().IsGenericLambda;
1121 CXXMethodDecl* CXXRecordDecl::getLambdaCallOperator() const {
1122 if (!isLambda()) return nullptr;
1123 DeclarationName Name =
1124 getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
1125 DeclContext::lookup_result Calls = lookup(Name);
1127 assert(!Calls.empty() && "Missing lambda call operator!");
1128 assert(Calls.size() == 1 && "More than one lambda call operator!");
1130 NamedDecl *CallOp = Calls.front();
1131 if (FunctionTemplateDecl *CallOpTmpl =
1132 dyn_cast<FunctionTemplateDecl>(CallOp))
1133 return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
1135 return cast<CXXMethodDecl>(CallOp);
1138 CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
1139 if (!isLambda()) return nullptr;
1140 DeclarationName Name =
1141 &getASTContext().Idents.get(getLambdaStaticInvokerName());
1142 DeclContext::lookup_result Invoker = lookup(Name);
1143 if (Invoker.empty()) return nullptr;
1144 assert(Invoker.size() == 1 && "More than one static invoker operator!");
1145 NamedDecl *InvokerFun = Invoker.front();
1146 if (FunctionTemplateDecl *InvokerTemplate =
1147 dyn_cast<FunctionTemplateDecl>(InvokerFun))
1148 return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
1150 return cast<CXXMethodDecl>(InvokerFun);
1153 void CXXRecordDecl::getCaptureFields(
1154 llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1155 FieldDecl *&ThisCapture) const {
1157 ThisCapture = nullptr;
1159 LambdaDefinitionData &Lambda = getLambdaData();
1160 RecordDecl::field_iterator Field = field_begin();
1161 for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
1162 C != CEnd; ++C, ++Field) {
1163 if (C->capturesThis())
1164 ThisCapture = *Field;
1165 else if (C->capturesVariable())
1166 Captures[C->getCapturedVar()] = *Field;
1168 assert(Field == field_end());
1171 TemplateParameterList *
1172 CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
1173 if (!isLambda()) return nullptr;
1174 CXXMethodDecl *CallOp = getLambdaCallOperator();
1175 if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
1176 return Tmpl->getTemplateParameters();
1180 Decl *CXXRecordDecl::getLambdaContextDecl() const {
1181 assert(isLambda() && "Not a lambda closure type!");
1182 ExternalASTSource *Source = getParentASTContext().getExternalSource();
1183 return getLambdaData().ContextDecl.get(Source);
1186 static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
1188 cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
1189 ->getConversionType();
1190 return Context.getCanonicalType(T);
1193 /// Collect the visible conversions of a base class.
1195 /// \param Record a base class of the class we're considering
1196 /// \param InVirtual whether this base class is a virtual base (or a base
1197 /// of a virtual base)
1198 /// \param Access the access along the inheritance path to this base
1199 /// \param ParentHiddenTypes the conversions provided by the inheritors
1201 /// \param Output the set to which to add conversions from non-virtual bases
1202 /// \param VOutput the set to which to add conversions from virtual bases
1203 /// \param HiddenVBaseCs the set of conversions which were hidden in a
1204 /// virtual base along some inheritance path
1205 static void CollectVisibleConversions(ASTContext &Context,
1206 CXXRecordDecl *Record,
1208 AccessSpecifier Access,
1209 const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
1210 ASTUnresolvedSet &Output,
1211 UnresolvedSetImpl &VOutput,
1212 llvm::SmallPtrSet<NamedDecl*, 8> &HiddenVBaseCs) {
1213 // The set of types which have conversions in this class or its
1214 // subclasses. As an optimization, we don't copy the derived set
1215 // unless it might change.
1216 const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
1217 llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
1219 // Collect the direct conversions and figure out which conversions
1220 // will be hidden in the subclasses.
1221 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1222 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1223 if (ConvI != ConvE) {
1224 HiddenTypesBuffer = ParentHiddenTypes;
1225 HiddenTypes = &HiddenTypesBuffer;
1227 for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
1228 CanQualType ConvType(GetConversionType(Context, I.getDecl()));
1229 bool Hidden = ParentHiddenTypes.count(ConvType);
1231 HiddenTypesBuffer.insert(ConvType);
1233 // If this conversion is hidden and we're in a virtual base,
1234 // remember that it's hidden along some inheritance path.
1235 if (Hidden && InVirtual)
1236 HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
1238 // If this conversion isn't hidden, add it to the appropriate output.
1240 AccessSpecifier IAccess
1241 = CXXRecordDecl::MergeAccess(Access, I.getAccess());
1244 VOutput.addDecl(I.getDecl(), IAccess);
1246 Output.addDecl(Context, I.getDecl(), IAccess);
1251 // Collect information recursively from any base classes.
1252 for (const auto &I : Record->bases()) {
1253 const RecordType *RT = I.getType()->getAs<RecordType>();
1256 AccessSpecifier BaseAccess
1257 = CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
1258 bool BaseInVirtual = InVirtual || I.isVirtual();
1260 CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
1261 CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
1262 *HiddenTypes, Output, VOutput, HiddenVBaseCs);
1266 /// Collect the visible conversions of a class.
1268 /// This would be extremely straightforward if it weren't for virtual
1269 /// bases. It might be worth special-casing that, really.
1270 static void CollectVisibleConversions(ASTContext &Context,
1271 CXXRecordDecl *Record,
1272 ASTUnresolvedSet &Output) {
1273 // The collection of all conversions in virtual bases that we've
1274 // found. These will be added to the output as long as they don't
1275 // appear in the hidden-conversions set.
1276 UnresolvedSet<8> VBaseCs;
1278 // The set of conversions in virtual bases that we've determined to
1280 llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
1282 // The set of types hidden by classes derived from this one.
1283 llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
1285 // Go ahead and collect the direct conversions and add them to the
1286 // hidden-types set.
1287 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1288 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1289 Output.append(Context, ConvI, ConvE);
1290 for (; ConvI != ConvE; ++ConvI)
1291 HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
1293 // Recursively collect conversions from base classes.
1294 for (const auto &I : Record->bases()) {
1295 const RecordType *RT = I.getType()->getAs<RecordType>();
1298 CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
1299 I.isVirtual(), I.getAccessSpecifier(),
1300 HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
1303 // Add any unhidden conversions provided by virtual bases.
1304 for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
1306 if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
1307 Output.addDecl(Context, I.getDecl(), I.getAccess());
1311 /// getVisibleConversionFunctions - get all conversion functions visible
1312 /// in current class; including conversion function templates.
1313 llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1314 CXXRecordDecl::getVisibleConversionFunctions() {
1315 ASTContext &Ctx = getASTContext();
1317 ASTUnresolvedSet *Set;
1318 if (bases_begin() == bases_end()) {
1319 // If root class, all conversions are visible.
1320 Set = &data().Conversions.get(Ctx);
1322 Set = &data().VisibleConversions.get(Ctx);
1323 // If visible conversion list is not evaluated, evaluate it.
1324 if (!data().ComputedVisibleConversions) {
1325 CollectVisibleConversions(Ctx, this, *Set);
1326 data().ComputedVisibleConversions = true;
1329 return llvm::make_range(Set->begin(), Set->end());
1332 void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
1333 // This operation is O(N) but extremely rare. Sema only uses it to
1334 // remove UsingShadowDecls in a class that were followed by a direct
1335 // declaration, e.g.:
1337 // using B::operator int;
1340 // This is uncommon by itself and even more uncommon in conjunction
1341 // with sufficiently large numbers of directly-declared conversions
1342 // that asymptotic behavior matters.
1344 ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
1345 for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
1346 if (Convs[I].getDecl() == ConvDecl) {
1348 assert(std::find(Convs.begin(), Convs.end(), ConvDecl) == Convs.end()
1349 && "conversion was found multiple times in unresolved set");
1354 llvm_unreachable("conversion not found in set!");
1357 CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
1358 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1359 return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
1364 MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
1365 return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1369 CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
1370 TemplateSpecializationKind TSK) {
1371 assert(TemplateOrInstantiation.isNull() &&
1372 "Previous template or instantiation?");
1373 assert(!isa<ClassTemplatePartialSpecializationDecl>(this));
1374 TemplateOrInstantiation
1375 = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1378 ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
1379 return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1382 void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
1383 TemplateOrInstantiation = Template;
1386 TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
1387 if (const ClassTemplateSpecializationDecl *Spec
1388 = dyn_cast<ClassTemplateSpecializationDecl>(this))
1389 return Spec->getSpecializationKind();
1391 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1392 return MSInfo->getTemplateSpecializationKind();
1394 return TSK_Undeclared;
1398 CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
1399 if (ClassTemplateSpecializationDecl *Spec
1400 = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1401 Spec->setSpecializationKind(TSK);
1405 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1406 MSInfo->setTemplateSpecializationKind(TSK);
1410 llvm_unreachable("Not a class template or member class specialization");
1413 const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
1414 auto GetDefinitionOrSelf =
1415 [](const CXXRecordDecl *D) -> const CXXRecordDecl * {
1416 if (auto *Def = D->getDefinition())
1421 // If it's a class template specialization, find the template or partial
1422 // specialization from which it was instantiated.
1423 if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1424 auto From = TD->getInstantiatedFrom();
1425 if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
1426 while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
1427 if (NewCTD->isMemberSpecialization())
1431 return GetDefinitionOrSelf(CTD->getTemplatedDecl());
1434 From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
1435 while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
1436 if (NewCTPSD->isMemberSpecialization())
1440 return GetDefinitionOrSelf(CTPSD);
1444 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1445 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
1446 const CXXRecordDecl *RD = this;
1447 while (auto *NewRD = RD->getInstantiatedFromMemberClass())
1449 return GetDefinitionOrSelf(RD);
1453 assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&
1454 "couldn't find pattern for class template instantiation");
1458 CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
1459 ASTContext &Context = getASTContext();
1460 QualType ClassType = Context.getTypeDeclType(this);
1462 DeclarationName Name
1463 = Context.DeclarationNames.getCXXDestructorName(
1464 Context.getCanonicalType(ClassType));
1466 DeclContext::lookup_result R = lookup(Name);
1468 return R.empty() ? nullptr : dyn_cast<CXXDestructorDecl>(R.front());
1471 bool CXXRecordDecl::isAnyDestructorNoReturn() const {
1472 // Destructor is noreturn.
1473 if (const CXXDestructorDecl *Destructor = getDestructor())
1474 if (Destructor->isNoReturn())
1477 // Check base classes destructor for noreturn.
1478 for (const auto &Base : bases())
1479 if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl())
1480 if (RD->isAnyDestructorNoReturn())
1483 // Check fields for noreturn.
1484 for (const auto *Field : fields())
1485 if (const CXXRecordDecl *RD =
1486 Field->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl())
1487 if (RD->isAnyDestructorNoReturn())
1490 // All destructors are not noreturn.
1494 static bool isDeclContextInNamespace(const DeclContext *DC) {
1495 while (!DC->isTranslationUnit()) {
1496 if (DC->isNamespace())
1498 DC = DC->getParent();
1503 bool CXXRecordDecl::isInterfaceLike() const {
1504 assert(hasDefinition() && "checking for interface-like without a definition");
1505 // All __interfaces are inheritently interface-like.
1509 // Interface-like types cannot have a user declared constructor, destructor,
1510 // friends, VBases, conversion functions, or fields. Additionally, lambdas
1511 // cannot be interface types.
1512 if (isLambda() || hasUserDeclaredConstructor() ||
1513 hasUserDeclaredDestructor() || !field_empty() || hasFriends() ||
1514 getNumVBases() > 0 || conversion_end() - conversion_begin() > 0)
1517 // No interface-like type can have a method with a definition.
1518 for (const auto *const Method : methods())
1519 if (Method->isDefined() && !Method->isImplicit())
1522 // Check "Special" types.
1523 const auto *Uuid = getAttr<UuidAttr>();
1524 // MS SDK declares IUnknown/IDispatch both in the root of a TU, or in an
1525 // extern C++ block directly in the TU. These are only valid if in one
1526 // of these two situations.
1527 if (Uuid && isStruct() && !getDeclContext()->isExternCContext() &&
1528 !isDeclContextInNamespace(getDeclContext()) &&
1529 ((getName() == "IUnknown" &&
1530 Uuid->getGuid() == "00000000-0000-0000-C000-000000000046") ||
1531 (getName() == "IDispatch" &&
1532 Uuid->getGuid() == "00020400-0000-0000-C000-000000000046"))) {
1533 if (getNumBases() > 0)
1538 // FIXME: Any access specifiers is supposed to make this no longer interface
1541 // If this isn't a 'special' type, it must have a single interface-like base.
1542 if (getNumBases() != 1)
1545 const auto BaseSpec = *bases_begin();
1546 if (BaseSpec.isVirtual() || BaseSpec.getAccessSpecifier() != AS_public)
1548 const auto *Base = BaseSpec.getType()->getAsCXXRecordDecl();
1549 if (Base->isInterface() || !Base->isInterfaceLike())
1554 void CXXRecordDecl::completeDefinition() {
1555 completeDefinition(nullptr);
1558 void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
1559 RecordDecl::completeDefinition();
1561 // If the class may be abstract (but hasn't been marked as such), check for
1562 // any pure final overriders.
1563 if (mayBeAbstract()) {
1564 CXXFinalOverriderMap MyFinalOverriders;
1565 if (!FinalOverriders) {
1566 getFinalOverriders(MyFinalOverriders);
1567 FinalOverriders = &MyFinalOverriders;
1571 for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
1572 MEnd = FinalOverriders->end();
1573 M != MEnd && !Done; ++M) {
1574 for (OverridingMethods::iterator SO = M->second.begin(),
1575 SOEnd = M->second.end();
1576 SO != SOEnd && !Done; ++SO) {
1577 assert(SO->second.size() > 0 &&
1578 "All virtual functions have overridding virtual functions");
1580 // C++ [class.abstract]p4:
1581 // A class is abstract if it contains or inherits at least one
1582 // pure virtual function for which the final overrider is pure
1584 if (SO->second.front().Method->isPure()) {
1585 data().Abstract = true;
1593 // Set access bits correctly on the directly-declared conversions.
1594 for (conversion_iterator I = conversion_begin(), E = conversion_end();
1596 I.setAccess((*I)->getAccess());
1599 bool CXXRecordDecl::mayBeAbstract() const {
1600 if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
1601 isDependentContext())
1604 for (const auto &B : bases()) {
1605 CXXRecordDecl *BaseDecl
1606 = cast<CXXRecordDecl>(B.getType()->getAs<RecordType>()->getDecl());
1607 if (BaseDecl->isAbstract())
1614 void CXXDeductionGuideDecl::anchor() {}
1616 CXXDeductionGuideDecl *CXXDeductionGuideDecl::Create(
1617 ASTContext &C, DeclContext *DC, SourceLocation StartLoc, bool IsExplicit,
1618 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
1619 SourceLocation EndLocation) {
1620 return new (C, DC) CXXDeductionGuideDecl(C, DC, StartLoc, IsExplicit,
1621 NameInfo, T, TInfo, EndLocation);
1624 CXXDeductionGuideDecl *CXXDeductionGuideDecl::CreateDeserialized(ASTContext &C,
1626 return new (C, ID) CXXDeductionGuideDecl(C, nullptr, SourceLocation(), false,
1627 DeclarationNameInfo(), QualType(),
1628 nullptr, SourceLocation());
1631 void CXXMethodDecl::anchor() {}
1633 bool CXXMethodDecl::isStatic() const {
1634 const CXXMethodDecl *MD = getCanonicalDecl();
1636 if (MD->getStorageClass() == SC_Static)
1639 OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
1640 return isStaticOverloadedOperator(OOK);
1643 static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
1644 const CXXMethodDecl *BaseMD) {
1645 for (const CXXMethodDecl *MD : DerivedMD->overridden_methods()) {
1646 if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
1648 if (recursivelyOverrides(MD, BaseMD))
1655 CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
1657 if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
1660 // Lookup doesn't work for destructors, so handle them separately.
1661 if (isa<CXXDestructorDecl>(this)) {
1662 CXXMethodDecl *MD = RD->getDestructor();
1664 if (recursivelyOverrides(MD, this))
1666 if (MayBeBase && recursivelyOverrides(this, MD))
1672 for (auto *ND : RD->lookup(getDeclName())) {
1673 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND);
1676 if (recursivelyOverrides(MD, this))
1678 if (MayBeBase && recursivelyOverrides(this, MD))
1682 for (const auto &I : RD->bases()) {
1683 const RecordType *RT = I.getType()->getAs<RecordType>();
1686 const CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
1687 CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
1696 CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1697 SourceLocation StartLoc,
1698 const DeclarationNameInfo &NameInfo,
1699 QualType T, TypeSourceInfo *TInfo,
1700 StorageClass SC, bool isInline,
1701 bool isConstexpr, SourceLocation EndLocation) {
1702 return new (C, RD) CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo,
1703 T, TInfo, SC, isInline, isConstexpr,
1707 CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1708 return new (C, ID) CXXMethodDecl(CXXMethod, C, nullptr, SourceLocation(),
1709 DeclarationNameInfo(), QualType(), nullptr,
1710 SC_None, false, false, SourceLocation());
1713 CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
1715 assert(isVirtual() && "this method is expected to be virtual");
1717 // When building with -fapple-kext, all calls must go through the vtable since
1718 // the kernel linker can do runtime patching of vtables.
1722 // If the member function is marked 'final', we know that it can't be
1723 // overridden and can therefore devirtualize it unless it's pure virtual.
1724 if (hasAttr<FinalAttr>())
1725 return isPure() ? nullptr : this;
1727 // If Base is unknown, we cannot devirtualize.
1731 // If the base expression (after skipping derived-to-base conversions) is a
1732 // class prvalue, then we can devirtualize.
1733 Base = Base->getBestDynamicClassTypeExpr();
1734 if (Base->isRValue() && Base->getType()->isRecordType())
1737 // If we don't even know what we would call, we can't devirtualize.
1738 const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType();
1739 if (!BestDynamicDecl)
1742 // There may be a method corresponding to MD in a derived class.
1743 CXXMethodDecl *DevirtualizedMethod =
1744 getCorrespondingMethodInClass(BestDynamicDecl);
1746 // If that method is pure virtual, we can't devirtualize. If this code is
1747 // reached, the result would be UB, not a direct call to the derived class
1748 // function, and we can't assume the derived class function is defined.
1749 if (DevirtualizedMethod->isPure())
1752 // If that method is marked final, we can devirtualize it.
1753 if (DevirtualizedMethod->hasAttr<FinalAttr>())
1754 return DevirtualizedMethod;
1756 // Similarly, if the class itself is marked 'final' it can't be overridden
1757 // and we can therefore devirtualize the member function call.
1758 if (BestDynamicDecl->hasAttr<FinalAttr>())
1759 return DevirtualizedMethod;
1761 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) {
1762 if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl()))
1763 if (VD->getType()->isRecordType())
1764 // This is a record decl. We know the type and can devirtualize it.
1765 return DevirtualizedMethod;
1770 // We can devirtualize calls on an object accessed by a class member access
1771 // expression, since by C++11 [basic.life]p6 we know that it can't refer to
1772 // a derived class object constructed in the same location.
1773 if (const MemberExpr *ME = dyn_cast<MemberExpr>(Base))
1774 if (const ValueDecl *VD = dyn_cast<ValueDecl>(ME->getMemberDecl()))
1775 return VD->getType()->isRecordType() ? DevirtualizedMethod : nullptr;
1777 // Likewise for calls on an object accessed by a (non-reference) pointer to
1779 if (auto *BO = dyn_cast<BinaryOperator>(Base)) {
1780 if (BO->isPtrMemOp()) {
1781 auto *MPT = BO->getRHS()->getType()->castAs<MemberPointerType>();
1782 if (MPT->getPointeeType()->isRecordType())
1783 return DevirtualizedMethod;
1787 // We can't devirtualize the call.
1791 bool CXXMethodDecl::isUsualDeallocationFunction() const {
1792 if (getOverloadedOperator() != OO_Delete &&
1793 getOverloadedOperator() != OO_Array_Delete)
1796 // C++ [basic.stc.dynamic.deallocation]p2:
1797 // A template instance is never a usual deallocation function,
1798 // regardless of its signature.
1799 if (getPrimaryTemplate())
1802 // C++ [basic.stc.dynamic.deallocation]p2:
1803 // If a class T has a member deallocation function named operator delete
1804 // with exactly one parameter, then that function is a usual (non-placement)
1805 // deallocation function. [...]
1806 if (getNumParams() == 1)
1808 unsigned UsualParams = 1;
1811 // A destroying operator delete is a usual deallocation function if
1812 // removing the std::destroying_delete_t parameter and changing the
1813 // first parameter type from T* to void* results in the signature of
1814 // a usual deallocation function.
1815 if (isDestroyingOperatorDelete())
1818 // C++ <=14 [basic.stc.dynamic.deallocation]p2:
1819 // [...] If class T does not declare such an operator delete but does
1820 // declare a member deallocation function named operator delete with
1821 // exactly two parameters, the second of which has type std::size_t (18.1),
1822 // then this function is a usual deallocation function.
1824 // C++17 says a usual deallocation function is one with the signature
1825 // (void* [, size_t] [, std::align_val_t] [, ...])
1826 // and all such functions are usual deallocation functions. It's not clear
1827 // that allowing varargs functions was intentional.
1828 ASTContext &Context = getASTContext();
1829 if (UsualParams < getNumParams() &&
1830 Context.hasSameUnqualifiedType(getParamDecl(UsualParams)->getType(),
1831 Context.getSizeType()))
1834 if (UsualParams < getNumParams() &&
1835 getParamDecl(UsualParams)->getType()->isAlignValT())
1838 if (UsualParams != getNumParams())
1841 // In C++17 onwards, all potential usual deallocation functions are actual
1842 // usual deallocation functions.
1843 if (Context.getLangOpts().AlignedAllocation)
1846 // This function is a usual deallocation function if there are no
1847 // single-parameter deallocation functions of the same kind.
1848 DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
1849 for (DeclContext::lookup_result::iterator I = R.begin(), E = R.end();
1851 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I))
1852 if (FD->getNumParams() == 1)
1859 bool CXXMethodDecl::isCopyAssignmentOperator() const {
1860 // C++0x [class.copy]p17:
1861 // A user-declared copy assignment operator X::operator= is a non-static
1862 // non-template member function of class X with exactly one parameter of
1863 // type X, X&, const X&, volatile X& or const volatile X&.
1864 if (/*operator=*/getOverloadedOperator() != OO_Equal ||
1865 /*non-static*/ isStatic() ||
1866 /*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
1867 getNumParams() != 1)
1870 QualType ParamType = getParamDecl(0)->getType();
1871 if (const LValueReferenceType *Ref = ParamType->getAs<LValueReferenceType>())
1872 ParamType = Ref->getPointeeType();
1874 ASTContext &Context = getASTContext();
1876 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
1877 return Context.hasSameUnqualifiedType(ClassType, ParamType);
1880 bool CXXMethodDecl::isMoveAssignmentOperator() const {
1881 // C++0x [class.copy]p19:
1882 // A user-declared move assignment operator X::operator= is a non-static
1883 // non-template member function of class X with exactly one parameter of type
1884 // X&&, const X&&, volatile X&&, or const volatile X&&.
1885 if (getOverloadedOperator() != OO_Equal || isStatic() ||
1886 getPrimaryTemplate() || getDescribedFunctionTemplate() ||
1887 getNumParams() != 1)
1890 QualType ParamType = getParamDecl(0)->getType();
1891 if (!isa<RValueReferenceType>(ParamType))
1893 ParamType = ParamType->getPointeeType();
1895 ASTContext &Context = getASTContext();
1897 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
1898 return Context.hasSameUnqualifiedType(ClassType, ParamType);
1901 void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
1902 assert(MD->isCanonicalDecl() && "Method is not canonical!");
1903 assert(!MD->getParent()->isDependentContext() &&
1904 "Can't add an overridden method to a class template!");
1905 assert(MD->isVirtual() && "Method is not virtual!");
1907 getASTContext().addOverriddenMethod(this, MD);
1910 CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
1911 if (isa<CXXConstructorDecl>(this)) return nullptr;
1912 return getASTContext().overridden_methods_begin(this);
1915 CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
1916 if (isa<CXXConstructorDecl>(this)) return nullptr;
1917 return getASTContext().overridden_methods_end(this);
1920 unsigned CXXMethodDecl::size_overridden_methods() const {
1921 if (isa<CXXConstructorDecl>(this)) return 0;
1922 return getASTContext().overridden_methods_size(this);
1925 CXXMethodDecl::overridden_method_range
1926 CXXMethodDecl::overridden_methods() const {
1927 if (isa<CXXConstructorDecl>(this))
1928 return overridden_method_range(nullptr, nullptr);
1929 return getASTContext().overridden_methods(this);
1932 QualType CXXMethodDecl::getThisType(ASTContext &C) const {
1933 // C++ 9.3.2p1: The type of this in a member function of a class X is X*.
1934 // If the member function is declared const, the type of this is const X*,
1935 // if the member function is declared volatile, the type of this is
1936 // volatile X*, and if the member function is declared const volatile,
1937 // the type of this is const volatile X*.
1939 assert(isInstance() && "No 'this' for static methods!");
1941 QualType ClassTy = C.getTypeDeclType(getParent());
1942 ClassTy = C.getQualifiedType(ClassTy,
1943 Qualifiers::fromCVRUMask(getTypeQualifiers()));
1944 return C.getPointerType(ClassTy);
1947 bool CXXMethodDecl::hasInlineBody() const {
1948 // If this function is a template instantiation, look at the template from
1949 // which it was instantiated.
1950 const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
1954 const FunctionDecl *fn;
1955 return CheckFn->isDefined(fn) && !fn->isOutOfLine() &&
1956 (fn->doesThisDeclarationHaveABody() || fn->willHaveBody());
1959 bool CXXMethodDecl::isLambdaStaticInvoker() const {
1960 const CXXRecordDecl *P = getParent();
1961 if (P->isLambda()) {
1962 if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
1963 if (StaticInvoker == this) return true;
1964 if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
1965 return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
1971 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1972 TypeSourceInfo *TInfo, bool IsVirtual,
1973 SourceLocation L, Expr *Init,
1975 SourceLocation EllipsisLoc)
1976 : Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
1977 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
1978 IsWritten(false), SourceOrder(0) {}
1980 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1982 SourceLocation MemberLoc,
1983 SourceLocation L, Expr *Init,
1985 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1986 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1987 IsWritten(false), SourceOrder(0) {}
1989 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1990 IndirectFieldDecl *Member,
1991 SourceLocation MemberLoc,
1992 SourceLocation L, Expr *Init,
1994 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1995 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1996 IsWritten(false), SourceOrder(0) {}
1998 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1999 TypeSourceInfo *TInfo,
2000 SourceLocation L, Expr *Init,
2002 : Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
2003 IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
2005 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
2006 if (isBaseInitializer())
2007 return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
2012 const Type *CXXCtorInitializer::getBaseClass() const {
2013 if (isBaseInitializer())
2014 return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
2019 SourceLocation CXXCtorInitializer::getSourceLocation() const {
2020 if (isInClassMemberInitializer())
2021 return getAnyMember()->getLocation();
2023 if (isAnyMemberInitializer())
2024 return getMemberLocation();
2026 if (TypeSourceInfo *TSInfo = Initializee.get<TypeSourceInfo*>())
2027 return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
2029 return SourceLocation();
2032 SourceRange CXXCtorInitializer::getSourceRange() const {
2033 if (isInClassMemberInitializer()) {
2034 FieldDecl *D = getAnyMember();
2035 if (Expr *I = D->getInClassInitializer())
2036 return I->getSourceRange();
2037 return SourceRange();
2040 return SourceRange(getSourceLocation(), getRParenLoc());
2043 void CXXConstructorDecl::anchor() {}
2045 CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
2048 unsigned Extra = additionalSizeToAlloc<InheritedConstructor>(Inherited);
2049 auto *Result = new (C, ID, Extra) CXXConstructorDecl(
2050 C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
2051 false, false, false, false, InheritedConstructor());
2052 Result->IsInheritingConstructor = Inherited;
2056 CXXConstructorDecl *
2057 CXXConstructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2058 SourceLocation StartLoc,
2059 const DeclarationNameInfo &NameInfo,
2060 QualType T, TypeSourceInfo *TInfo,
2061 bool isExplicit, bool isInline,
2062 bool isImplicitlyDeclared, bool isConstexpr,
2063 InheritedConstructor Inherited) {
2064 assert(NameInfo.getName().getNameKind()
2065 == DeclarationName::CXXConstructorName &&
2066 "Name must refer to a constructor");
2068 additionalSizeToAlloc<InheritedConstructor>(Inherited ? 1 : 0);
2069 return new (C, RD, Extra) CXXConstructorDecl(
2070 C, RD, StartLoc, NameInfo, T, TInfo, isExplicit, isInline,
2071 isImplicitlyDeclared, isConstexpr, Inherited);
2074 CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
2075 return CtorInitializers.get(getASTContext().getExternalSource());
2078 CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
2079 assert(isDelegatingConstructor() && "Not a delegating constructor!");
2080 Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
2081 if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(E))
2082 return Construct->getConstructor();
2087 bool CXXConstructorDecl::isDefaultConstructor() const {
2088 // C++ [class.ctor]p5:
2089 // A default constructor for a class X is a constructor of class
2090 // X that can be called without an argument.
2091 return (getNumParams() == 0) ||
2092 (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
2096 CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
2097 return isCopyOrMoveConstructor(TypeQuals) &&
2098 getParamDecl(0)->getType()->isLValueReferenceType();
2101 bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
2102 return isCopyOrMoveConstructor(TypeQuals) &&
2103 getParamDecl(0)->getType()->isRValueReferenceType();
2106 /// \brief Determine whether this is a copy or move constructor.
2107 bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
2108 // C++ [class.copy]p2:
2109 // A non-template constructor for class X is a copy constructor
2110 // if its first parameter is of type X&, const X&, volatile X& or
2111 // const volatile X&, and either there are no other parameters
2112 // or else all other parameters have default arguments (8.3.6).
2113 // C++0x [class.copy]p3:
2114 // A non-template constructor for class X is a move constructor if its
2115 // first parameter is of type X&&, const X&&, volatile X&&, or
2116 // const volatile X&&, and either there are no other parameters or else
2117 // all other parameters have default arguments.
2118 if ((getNumParams() < 1) ||
2119 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2120 (getPrimaryTemplate() != nullptr) ||
2121 (getDescribedFunctionTemplate() != nullptr))
2124 const ParmVarDecl *Param = getParamDecl(0);
2126 // Do we have a reference type?
2127 const ReferenceType *ParamRefType = Param->getType()->getAs<ReferenceType>();
2131 // Is it a reference to our class type?
2132 ASTContext &Context = getASTContext();
2134 CanQualType PointeeType
2135 = Context.getCanonicalType(ParamRefType->getPointeeType());
2137 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2138 if (PointeeType.getUnqualifiedType() != ClassTy)
2141 // FIXME: other qualifiers?
2143 // We have a copy or move constructor.
2144 TypeQuals = PointeeType.getCVRQualifiers();
2148 bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
2149 // C++ [class.conv.ctor]p1:
2150 // A constructor declared without the function-specifier explicit
2151 // that can be called with a single parameter specifies a
2152 // conversion from the type of its first parameter to the type of
2153 // its class. Such a constructor is called a converting
2155 if (isExplicit() && !AllowExplicit)
2158 return (getNumParams() == 0 &&
2159 getType()->getAs<FunctionProtoType>()->isVariadic()) ||
2160 (getNumParams() == 1) ||
2161 (getNumParams() > 1 &&
2162 (getParamDecl(1)->hasDefaultArg() ||
2163 getParamDecl(1)->isParameterPack()));
2166 bool CXXConstructorDecl::isSpecializationCopyingObject() const {
2167 if ((getNumParams() < 1) ||
2168 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2169 (getDescribedFunctionTemplate() != nullptr))
2172 const ParmVarDecl *Param = getParamDecl(0);
2174 ASTContext &Context = getASTContext();
2175 CanQualType ParamType = Context.getCanonicalType(Param->getType());
2177 // Is it the same as our our class type?
2179 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2180 if (ParamType.getUnqualifiedType() != ClassTy)
2186 void CXXDestructorDecl::anchor() {}
2189 CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2191 CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2192 QualType(), nullptr, false, false);
2196 CXXDestructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2197 SourceLocation StartLoc,
2198 const DeclarationNameInfo &NameInfo,
2199 QualType T, TypeSourceInfo *TInfo,
2200 bool isInline, bool isImplicitlyDeclared) {
2201 assert(NameInfo.getName().getNameKind()
2202 == DeclarationName::CXXDestructorName &&
2203 "Name must refer to a destructor");
2204 return new (C, RD) CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo,
2205 isInline, isImplicitlyDeclared);
2208 void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD, Expr *ThisArg) {
2209 auto *First = cast<CXXDestructorDecl>(getFirstDecl());
2210 if (OD && !First->OperatorDelete) {
2211 First->OperatorDelete = OD;
2212 First->OperatorDeleteThisArg = ThisArg;
2213 if (auto *L = getASTMutationListener())
2214 L->ResolvedOperatorDelete(First, OD, ThisArg);
2218 void CXXConversionDecl::anchor() {}
2221 CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2222 return new (C, ID) CXXConversionDecl(C, nullptr, SourceLocation(),
2223 DeclarationNameInfo(), QualType(),
2224 nullptr, false, false, false,
2229 CXXConversionDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2230 SourceLocation StartLoc,
2231 const DeclarationNameInfo &NameInfo,
2232 QualType T, TypeSourceInfo *TInfo,
2233 bool isInline, bool isExplicit,
2234 bool isConstexpr, SourceLocation EndLocation) {
2235 assert(NameInfo.getName().getNameKind()
2236 == DeclarationName::CXXConversionFunctionName &&
2237 "Name must refer to a conversion function");
2238 return new (C, RD) CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo,
2239 isInline, isExplicit, isConstexpr,
2243 bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
2244 return isImplicit() && getParent()->isLambda() &&
2245 getConversionType()->isBlockPointerType();
2248 void LinkageSpecDecl::anchor() {}
2250 LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
2252 SourceLocation ExternLoc,
2253 SourceLocation LangLoc,
2256 return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2259 LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
2261 return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
2262 SourceLocation(), lang_c, false);
2265 void UsingDirectiveDecl::anchor() {}
2267 UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
2269 SourceLocation NamespaceLoc,
2270 NestedNameSpecifierLoc QualifierLoc,
2271 SourceLocation IdentLoc,
2273 DeclContext *CommonAncestor) {
2274 if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Used))
2275 Used = NS->getOriginalNamespace();
2276 return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
2277 IdentLoc, Used, CommonAncestor);
2280 UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
2282 return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
2284 NestedNameSpecifierLoc(),
2285 SourceLocation(), nullptr, nullptr);
2288 NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
2289 if (NamespaceAliasDecl *NA =
2290 dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
2291 return NA->getNamespace();
2292 return cast_or_null<NamespaceDecl>(NominatedNamespace);
2295 NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
2296 SourceLocation StartLoc, SourceLocation IdLoc,
2297 IdentifierInfo *Id, NamespaceDecl *PrevDecl)
2298 : NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
2299 redeclarable_base(C), LocStart(StartLoc),
2300 AnonOrFirstNamespaceAndInline(nullptr, Inline) {
2301 setPreviousDecl(PrevDecl);
2304 AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
2307 NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
2308 bool Inline, SourceLocation StartLoc,
2309 SourceLocation IdLoc, IdentifierInfo *Id,
2310 NamespaceDecl *PrevDecl) {
2311 return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
2315 NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2316 return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
2317 SourceLocation(), nullptr, nullptr);
2320 NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
2324 return AnonOrFirstNamespaceAndInline.getPointer();
2327 const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
2331 return AnonOrFirstNamespaceAndInline.getPointer();
2334 bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
2336 NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
2337 return getNextRedeclaration();
2340 NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
2341 return getPreviousDecl();
2344 NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
2345 return getMostRecentDecl();
2348 void NamespaceAliasDecl::anchor() {}
2350 NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
2351 return getNextRedeclaration();
2354 NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
2355 return getPreviousDecl();
2358 NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
2359 return getMostRecentDecl();
2362 NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
2363 SourceLocation UsingLoc,
2364 SourceLocation AliasLoc,
2365 IdentifierInfo *Alias,
2366 NestedNameSpecifierLoc QualifierLoc,
2367 SourceLocation IdentLoc,
2368 NamedDecl *Namespace) {
2369 // FIXME: Preserve the aliased namespace as written.
2370 if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
2371 Namespace = NS->getOriginalNamespace();
2372 return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
2373 QualifierLoc, IdentLoc, Namespace);
2376 NamespaceAliasDecl *
2377 NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2378 return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
2379 SourceLocation(), nullptr,
2380 NestedNameSpecifierLoc(),
2381 SourceLocation(), nullptr);
2384 void UsingShadowDecl::anchor() {}
2386 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
2387 SourceLocation Loc, UsingDecl *Using,
2389 : NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
2390 redeclarable_base(C), Underlying(Target),
2391 UsingOrNextShadow(cast<NamedDecl>(Using)) {
2393 IdentifierNamespace = Target->getIdentifierNamespace();
2397 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
2398 : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
2399 redeclarable_base(C) {}
2402 UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2403 return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2406 UsingDecl *UsingShadowDecl::getUsingDecl() const {
2407 const UsingShadowDecl *Shadow = this;
2408 while (const UsingShadowDecl *NextShadow =
2409 dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
2410 Shadow = NextShadow;
2411 return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2414 void ConstructorUsingShadowDecl::anchor() {}
2416 ConstructorUsingShadowDecl *
2417 ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
2418 SourceLocation Loc, UsingDecl *Using,
2419 NamedDecl *Target, bool IsVirtual) {
2420 return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
2424 ConstructorUsingShadowDecl *
2425 ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2426 return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2429 CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
2430 return getUsingDecl()->getQualifier()->getAsRecordDecl();
2433 void UsingDecl::anchor() {}
2435 void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
2436 assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
2437 "declaration already in set");
2438 assert(S->getUsingDecl() == this);
2440 if (FirstUsingShadow.getPointer())
2441 S->UsingOrNextShadow = FirstUsingShadow.getPointer();
2442 FirstUsingShadow.setPointer(S);
2445 void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
2446 assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
2447 "declaration not in set");
2448 assert(S->getUsingDecl() == this);
2450 // Remove S from the shadow decl chain. This is O(n) but hopefully rare.
2452 if (FirstUsingShadow.getPointer() == S) {
2453 FirstUsingShadow.setPointer(
2454 dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
2455 S->UsingOrNextShadow = this;
2459 UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
2460 while (Prev->UsingOrNextShadow != S)
2461 Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
2462 Prev->UsingOrNextShadow = S->UsingOrNextShadow;
2463 S->UsingOrNextShadow = this;
2466 UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
2467 NestedNameSpecifierLoc QualifierLoc,
2468 const DeclarationNameInfo &NameInfo,
2470 return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
2473 UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2474 return new (C, ID) UsingDecl(nullptr, SourceLocation(),
2475 NestedNameSpecifierLoc(), DeclarationNameInfo(),
2479 SourceRange UsingDecl::getSourceRange() const {
2480 SourceLocation Begin = isAccessDeclaration()
2481 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2482 return SourceRange(Begin, getNameInfo().getEndLoc());
2485 void UsingPackDecl::anchor() {}
2487 UsingPackDecl *UsingPackDecl::Create(ASTContext &C, DeclContext *DC,
2488 NamedDecl *InstantiatedFrom,
2489 ArrayRef<NamedDecl *> UsingDecls) {
2490 size_t Extra = additionalSizeToAlloc<NamedDecl *>(UsingDecls.size());
2491 return new (C, DC, Extra) UsingPackDecl(DC, InstantiatedFrom, UsingDecls);
2494 UsingPackDecl *UsingPackDecl::CreateDeserialized(ASTContext &C, unsigned ID,
2495 unsigned NumExpansions) {
2496 size_t Extra = additionalSizeToAlloc<NamedDecl *>(NumExpansions);
2497 auto *Result = new (C, ID, Extra) UsingPackDecl(nullptr, nullptr, None);
2498 Result->NumExpansions = NumExpansions;
2499 auto *Trail = Result->getTrailingObjects<NamedDecl *>();
2500 for (unsigned I = 0; I != NumExpansions; ++I)
2501 new (Trail + I) NamedDecl*(nullptr);
2505 void UnresolvedUsingValueDecl::anchor() {}
2507 UnresolvedUsingValueDecl *
2508 UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
2509 SourceLocation UsingLoc,
2510 NestedNameSpecifierLoc QualifierLoc,
2511 const DeclarationNameInfo &NameInfo,
2512 SourceLocation EllipsisLoc) {
2513 return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
2514 QualifierLoc, NameInfo,
2518 UnresolvedUsingValueDecl *
2519 UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2520 return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
2522 NestedNameSpecifierLoc(),
2523 DeclarationNameInfo(),
2527 SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
2528 SourceLocation Begin = isAccessDeclaration()
2529 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2530 return SourceRange(Begin, getNameInfo().getEndLoc());
2533 void UnresolvedUsingTypenameDecl::anchor() {}
2535 UnresolvedUsingTypenameDecl *
2536 UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
2537 SourceLocation UsingLoc,
2538 SourceLocation TypenameLoc,
2539 NestedNameSpecifierLoc QualifierLoc,
2540 SourceLocation TargetNameLoc,
2541 DeclarationName TargetName,
2542 SourceLocation EllipsisLoc) {
2543 return new (C, DC) UnresolvedUsingTypenameDecl(
2544 DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
2545 TargetName.getAsIdentifierInfo(), EllipsisLoc);
2548 UnresolvedUsingTypenameDecl *
2549 UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2550 return new (C, ID) UnresolvedUsingTypenameDecl(
2551 nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
2552 SourceLocation(), nullptr, SourceLocation());
2555 void StaticAssertDecl::anchor() {}
2557 StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
2558 SourceLocation StaticAssertLoc,
2560 StringLiteral *Message,
2561 SourceLocation RParenLoc,
2563 return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
2567 StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
2569 return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
2570 nullptr, SourceLocation(), false);
2573 void BindingDecl::anchor() {}
2575 BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
2576 SourceLocation IdLoc, IdentifierInfo *Id) {
2577 return new (C, DC) BindingDecl(DC, IdLoc, Id);
2580 BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2581 return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
2584 VarDecl *BindingDecl::getHoldingVar() const {
2585 Expr *B = getBinding();
2588 auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
2592 auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
2593 assert(VD->isImplicit() && "holding var for binding decl not implicit");
2597 void DecompositionDecl::anchor() {}
2599 DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
2600 SourceLocation StartLoc,
2601 SourceLocation LSquareLoc,
2602 QualType T, TypeSourceInfo *TInfo,
2604 ArrayRef<BindingDecl *> Bindings) {
2605 size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
2606 return new (C, DC, Extra)
2607 DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
2610 DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
2612 unsigned NumBindings) {
2613 size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
2614 auto *Result = new (C, ID, Extra)
2615 DecompositionDecl(C, nullptr, SourceLocation(), SourceLocation(),
2616 QualType(), nullptr, StorageClass(), None);
2617 // Set up and clean out the bindings array.
2618 Result->NumBindings = NumBindings;
2619 auto *Trail = Result->getTrailingObjects<BindingDecl *>();
2620 for (unsigned I = 0; I != NumBindings; ++I)
2621 new (Trail + I) BindingDecl*(nullptr);
2625 void DecompositionDecl::printName(llvm::raw_ostream &os) const {
2628 for (auto *B : bindings()) {
2637 MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
2638 SourceLocation L, DeclarationName N,
2639 QualType T, TypeSourceInfo *TInfo,
2640 SourceLocation StartL,
2641 IdentifierInfo *Getter,
2642 IdentifierInfo *Setter) {
2643 return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
2646 MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
2648 return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
2649 DeclarationName(), QualType(), nullptr,
2650 SourceLocation(), nullptr, nullptr);
2653 static const char *getAccessName(AccessSpecifier AS) {
2656 llvm_unreachable("Invalid access specifier!");
2664 llvm_unreachable("Invalid access specifier!");
2667 const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
2668 AccessSpecifier AS) {
2669 return DB << getAccessName(AS);
2672 const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
2673 AccessSpecifier AS) {
2674 return DB << getAccessName(AS);