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 //===----------------------------------------------------------------------===//
13 #include "clang/AST/DeclCXX.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/ASTLambda.h"
16 #include "clang/AST/ASTMutationListener.h"
17 #include "clang/AST/CXXInheritance.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/ExprCXX.h"
21 #include "clang/AST/TypeLoc.h"
22 #include "clang/Basic/IdentifierTable.h"
23 #include "llvm/ADT/STLExtras.h"
24 #include "llvm/ADT/SmallPtrSet.h"
25 using namespace clang;
27 //===----------------------------------------------------------------------===//
28 // Decl Allocation/Deallocation Method Implementations
29 //===----------------------------------------------------------------------===//
31 void AccessSpecDecl::anchor() { }
33 AccessSpecDecl *AccessSpecDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
34 return new (C, ID) AccessSpecDecl(EmptyShell());
37 void LazyASTUnresolvedSet::getFromExternalSource(ASTContext &C) const {
38 ExternalASTSource *Source = C.getExternalSource();
39 assert(Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set");
40 assert(Source && "getFromExternalSource with no external source");
42 for (ASTUnresolvedSet::iterator I = Impl.begin(); I != Impl.end(); ++I)
43 I.setDecl(cast<NamedDecl>(Source->GetExternalDecl(
44 reinterpret_cast<uintptr_t>(I.getDecl()) >> 2)));
45 Impl.Decls.setLazy(false);
48 CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
49 : UserDeclaredConstructor(false), UserDeclaredSpecialMembers(0),
50 Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
51 Abstract(false), IsStandardLayout(true), HasNoNonEmptyBases(true),
52 HasPrivateFields(false), HasProtectedFields(false),
53 HasPublicFields(false), HasMutableFields(false), HasVariantMembers(false),
54 HasOnlyCMembers(true), HasInClassInitializer(false),
55 HasUninitializedReferenceMember(false), HasUninitializedFields(false),
56 HasInheritedConstructor(false), HasInheritedAssignment(false),
57 NeedOverloadResolutionForMoveConstructor(false),
58 NeedOverloadResolutionForMoveAssignment(false),
59 NeedOverloadResolutionForDestructor(false),
60 DefaultedMoveConstructorIsDeleted(false),
61 DefaultedMoveAssignmentIsDeleted(false),
62 DefaultedDestructorIsDeleted(false), HasTrivialSpecialMembers(SMF_All),
63 DeclaredNonTrivialSpecialMembers(0), HasIrrelevantDestructor(true),
64 HasConstexprNonCopyMoveConstructor(false),
65 HasDefaultedDefaultConstructor(false),
66 DefaultedDefaultConstructorIsConstexpr(true),
67 HasConstexprDefaultConstructor(false),
68 HasNonLiteralTypeFieldsOrBases(false), ComputedVisibleConversions(false),
69 UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
70 ImplicitCopyConstructorHasConstParam(true),
71 ImplicitCopyAssignmentHasConstParam(true),
72 HasDeclaredCopyConstructorWithConstParam(false),
73 HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
74 IsParsingBaseSpecifiers(false), NumBases(0), NumVBases(0), Bases(),
75 VBases(), Definition(D), FirstFriend() {}
77 CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
78 return Bases.get(Definition->getASTContext().getExternalSource());
81 CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
82 return VBases.get(Definition->getASTContext().getExternalSource());
85 CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
86 DeclContext *DC, SourceLocation StartLoc,
87 SourceLocation IdLoc, IdentifierInfo *Id,
88 CXXRecordDecl *PrevDecl)
89 : RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
90 DefinitionData(PrevDecl ? PrevDecl->DefinitionData
92 TemplateOrInstantiation() {}
94 CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
95 DeclContext *DC, SourceLocation StartLoc,
96 SourceLocation IdLoc, IdentifierInfo *Id,
97 CXXRecordDecl* PrevDecl,
98 bool DelayTypeCreation) {
99 CXXRecordDecl *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc,
100 IdLoc, Id, PrevDecl);
101 R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
103 // FIXME: DelayTypeCreation seems like such a hack
104 if (!DelayTypeCreation)
105 C.getTypeDeclType(R, PrevDecl);
110 CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
111 TypeSourceInfo *Info, SourceLocation Loc,
112 bool Dependent, bool IsGeneric,
113 LambdaCaptureDefault CaptureDefault) {
115 new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
117 R->IsBeingDefined = true;
119 new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
121 R->MayHaveOutOfDateDef = false;
122 R->setImplicit(true);
123 C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
128 CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
129 CXXRecordDecl *R = new (C, ID) CXXRecordDecl(
130 CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
132 R->MayHaveOutOfDateDef = false;
137 CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
139 ASTContext &C = getASTContext();
141 if (!data().Bases.isOffset() && data().NumBases > 0)
142 C.Deallocate(data().getBases());
145 if (!C.getLangOpts().CPlusPlus1z) {
146 // C++ [dcl.init.aggr]p1:
147 // An aggregate is [...] a class with [...] no base classes [...].
148 data().Aggregate = false;
152 // A POD-struct is an aggregate class...
153 data().PlainOldData = false;
156 // The set of seen virtual base types.
157 llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
159 // The virtual bases of this class.
160 SmallVector<const CXXBaseSpecifier *, 8> VBases;
162 data().Bases = new(C) CXXBaseSpecifier [NumBases];
163 data().NumBases = NumBases;
164 for (unsigned i = 0; i < NumBases; ++i) {
165 data().getBases()[i] = *Bases[i];
166 // Keep track of inherited vbases for this base class.
167 const CXXBaseSpecifier *Base = Bases[i];
168 QualType BaseType = Base->getType();
169 // Skip dependent types; we can't do any checking on them now.
170 if (BaseType->isDependentType())
172 CXXRecordDecl *BaseClassDecl
173 = cast<CXXRecordDecl>(BaseType->getAs<RecordType>()->getDecl());
175 if (!BaseClassDecl->isEmpty()) {
178 // A standard-layout class is a class that:
180 // -- either has no non-static data members in the most derived
181 // class and at most one base class with non-static data members,
182 // or has no base classes with non-static data members, and
183 // If this is the second non-empty base, then neither of these two
184 // clauses can be true.
185 data().IsStandardLayout = false;
188 // C++14 [meta.unary.prop]p4:
189 // T is a class type [...] with [...] no base class B for which
190 // is_empty<B>::value is false.
191 data().Empty = false;
192 data().HasNoNonEmptyBases = false;
195 // C++1z [dcl.init.agg]p1:
196 // An aggregate is a class with [...] no private or protected base classes
197 if (Base->getAccessSpecifier() != AS_public)
198 data().Aggregate = false;
200 // C++ [class.virtual]p1:
201 // A class that declares or inherits a virtual function is called a
202 // polymorphic class.
203 if (BaseClassDecl->isPolymorphic())
204 data().Polymorphic = true;
207 // A standard-layout class is a class that: [...]
208 // -- has no non-standard-layout base classes
209 if (!BaseClassDecl->isStandardLayout())
210 data().IsStandardLayout = false;
212 // Record if this base is the first non-literal field or base.
213 if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
214 data().HasNonLiteralTypeFieldsOrBases = true;
216 // Now go through all virtual bases of this base and add them.
217 for (const auto &VBase : BaseClassDecl->vbases()) {
218 // Add this base if it's not already in the list.
219 if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
220 VBases.push_back(&VBase);
222 // C++11 [class.copy]p8:
223 // The implicitly-declared copy constructor for a class X will have
224 // the form 'X::X(const X&)' if each [...] virtual base class B of X
225 // has a copy constructor whose first parameter is of type
226 // 'const B&' or 'const volatile B&' [...]
227 if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
228 if (!VBaseDecl->hasCopyConstructorWithConstParam())
229 data().ImplicitCopyConstructorHasConstParam = false;
231 // C++1z [dcl.init.agg]p1:
232 // An aggregate is a class with [...] no virtual base classes
233 data().Aggregate = false;
237 if (Base->isVirtual()) {
238 // Add this base if it's not already in the list.
239 if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
240 VBases.push_back(Base);
242 // C++14 [meta.unary.prop] is_empty:
243 // T is a class type, but not a union type, with ... no virtual base
245 data().Empty = false;
247 // C++1z [dcl.init.agg]p1:
248 // An aggregate is a class with [...] no virtual base classes
249 data().Aggregate = false;
251 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
252 // A [default constructor, copy/move constructor, or copy/move assignment
253 // operator for a class X] is trivial [...] if:
254 // -- class X has [...] no virtual base classes
255 data().HasTrivialSpecialMembers &= SMF_Destructor;
258 // A standard-layout class is a class that: [...]
259 // -- has [...] no virtual base classes
260 data().IsStandardLayout = false;
262 // C++11 [dcl.constexpr]p4:
263 // In the definition of a constexpr constructor [...]
264 // -- the class shall not have any virtual base classes
265 data().DefaultedDefaultConstructorIsConstexpr = false;
267 // C++ [class.ctor]p5:
268 // A default constructor is trivial [...] if:
269 // -- all the direct base classes of its class have trivial default
271 if (!BaseClassDecl->hasTrivialDefaultConstructor())
272 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
274 // C++0x [class.copy]p13:
275 // A copy/move constructor for class X is trivial if [...]
277 // -- the constructor selected to copy/move each direct base class
278 // subobject is trivial, and
279 if (!BaseClassDecl->hasTrivialCopyConstructor())
280 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
281 // If the base class doesn't have a simple move constructor, we'll eagerly
282 // declare it and perform overload resolution to determine which function
283 // it actually calls. If it does have a simple move constructor, this
285 if (!BaseClassDecl->hasTrivialMoveConstructor())
286 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
288 // C++0x [class.copy]p27:
289 // A copy/move assignment operator for class X is trivial if [...]
291 // -- the assignment operator selected to copy/move each direct base
292 // class subobject is trivial, and
293 if (!BaseClassDecl->hasTrivialCopyAssignment())
294 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
295 // If the base class doesn't have a simple move assignment, we'll eagerly
296 // declare it and perform overload resolution to determine which function
297 // it actually calls. If it does have a simple move assignment, this
299 if (!BaseClassDecl->hasTrivialMoveAssignment())
300 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
302 // C++11 [class.ctor]p6:
303 // If that user-written default constructor would satisfy the
304 // requirements of a constexpr constructor, the implicitly-defined
305 // default constructor is constexpr.
306 if (!BaseClassDecl->hasConstexprDefaultConstructor())
307 data().DefaultedDefaultConstructorIsConstexpr = false;
310 // C++ [class.ctor]p3:
311 // A destructor is trivial if all the direct base classes of its class
312 // have trivial destructors.
313 if (!BaseClassDecl->hasTrivialDestructor())
314 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
316 if (!BaseClassDecl->hasIrrelevantDestructor())
317 data().HasIrrelevantDestructor = false;
319 // C++11 [class.copy]p18:
320 // The implicitly-declared copy assignment oeprator for a class X will
321 // have the form 'X& X::operator=(const X&)' if each direct base class B
322 // of X has a copy assignment operator whose parameter is of type 'const
323 // B&', 'const volatile B&', or 'B' [...]
324 if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
325 data().ImplicitCopyAssignmentHasConstParam = false;
327 // C++11 [class.copy]p8:
328 // The implicitly-declared copy constructor for a class X will have
329 // the form 'X::X(const X&)' if each direct [...] base class B of X
330 // has a copy constructor whose first parameter is of type
331 // 'const B&' or 'const volatile B&' [...]
332 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
333 data().ImplicitCopyConstructorHasConstParam = false;
335 // A class has an Objective-C object member if... or any of its bases
336 // has an Objective-C object member.
337 if (BaseClassDecl->hasObjectMember())
338 setHasObjectMember(true);
340 if (BaseClassDecl->hasVolatileMember())
341 setHasVolatileMember(true);
343 // Keep track of the presence of mutable fields.
344 if (BaseClassDecl->hasMutableFields())
345 data().HasMutableFields = true;
347 if (BaseClassDecl->hasUninitializedReferenceMember())
348 data().HasUninitializedReferenceMember = true;
350 if (!BaseClassDecl->allowConstDefaultInit())
351 data().HasUninitializedFields = true;
353 addedClassSubobject(BaseClassDecl);
356 if (VBases.empty()) {
357 data().IsParsingBaseSpecifiers = false;
361 // Create base specifier for any direct or indirect virtual bases.
362 data().VBases = new (C) CXXBaseSpecifier[VBases.size()];
363 data().NumVBases = VBases.size();
364 for (int I = 0, E = VBases.size(); I != E; ++I) {
365 QualType Type = VBases[I]->getType();
366 if (!Type->isDependentType())
367 addedClassSubobject(Type->getAsCXXRecordDecl());
368 data().getVBases()[I] = *VBases[I];
371 data().IsParsingBaseSpecifiers = false;
374 void CXXRecordDecl::addedClassSubobject(CXXRecordDecl *Subobj) {
375 // C++11 [class.copy]p11:
376 // A defaulted copy/move constructor for a class X is defined as
378 // -- a direct or virtual base class B that cannot be copied/moved [...]
379 // -- a non-static data member of class type M (or array thereof)
380 // that cannot be copied or moved [...]
381 if (!Subobj->hasSimpleMoveConstructor())
382 data().NeedOverloadResolutionForMoveConstructor = true;
384 // C++11 [class.copy]p23:
385 // A defaulted copy/move assignment operator for a class X is defined as
387 // -- a direct or virtual base class B that cannot be copied/moved [...]
388 // -- a non-static data member of class type M (or array thereof)
389 // that cannot be copied or moved [...]
390 if (!Subobj->hasSimpleMoveAssignment())
391 data().NeedOverloadResolutionForMoveAssignment = true;
393 // C++11 [class.ctor]p5, C++11 [class.copy]p11, C++11 [class.dtor]p5:
394 // A defaulted [ctor or dtor] for a class X is defined as
396 // -- any direct or virtual base class [...] has a type with a destructor
397 // that is deleted or inaccessible from the defaulted [ctor or dtor].
398 // -- any non-static data member has a type with a destructor
399 // that is deleted or inaccessible from the defaulted [ctor or dtor].
400 if (!Subobj->hasSimpleDestructor()) {
401 data().NeedOverloadResolutionForMoveConstructor = true;
402 data().NeedOverloadResolutionForDestructor = true;
406 bool CXXRecordDecl::hasAnyDependentBases() const {
407 if (!isDependentContext())
410 return !forallBases([](const CXXRecordDecl *) { return true; });
413 bool CXXRecordDecl::isTriviallyCopyable() const {
415 // A trivially copyable class is a class that:
416 // -- has no non-trivial copy constructors,
417 if (hasNonTrivialCopyConstructor()) return false;
418 // -- has no non-trivial move constructors,
419 if (hasNonTrivialMoveConstructor()) return false;
420 // -- has no non-trivial copy assignment operators,
421 if (hasNonTrivialCopyAssignment()) return false;
422 // -- has no non-trivial move assignment operators, and
423 if (hasNonTrivialMoveAssignment()) return false;
424 // -- has a trivial destructor.
425 if (!hasTrivialDestructor()) return false;
430 void CXXRecordDecl::markedVirtualFunctionPure() {
431 // C++ [class.abstract]p2:
432 // A class is abstract if it has at least one pure virtual function.
433 data().Abstract = true;
436 void CXXRecordDecl::addedMember(Decl *D) {
437 if (!D->isImplicit() &&
438 !isa<FieldDecl>(D) &&
439 !isa<IndirectFieldDecl>(D) &&
440 (!isa<TagDecl>(D) || cast<TagDecl>(D)->getTagKind() == TTK_Class ||
441 cast<TagDecl>(D)->getTagKind() == TTK_Interface))
442 data().HasOnlyCMembers = false;
444 // Ignore friends and invalid declarations.
445 if (D->getFriendObjectKind() || D->isInvalidDecl())
448 FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D);
450 D = FunTmpl->getTemplatedDecl();
452 // FIXME: Pass NamedDecl* to addedMember?
453 Decl *DUnderlying = D;
454 if (auto *ND = dyn_cast<NamedDecl>(DUnderlying)) {
455 DUnderlying = ND->getUnderlyingDecl();
456 if (FunctionTemplateDecl *UnderlyingFunTmpl =
457 dyn_cast<FunctionTemplateDecl>(DUnderlying))
458 DUnderlying = UnderlyingFunTmpl->getTemplatedDecl();
461 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
462 if (Method->isVirtual()) {
463 // C++ [dcl.init.aggr]p1:
464 // An aggregate is an array or a class with [...] no virtual functions.
465 data().Aggregate = false;
468 // A POD-struct is an aggregate class...
469 data().PlainOldData = false;
471 // C++14 [meta.unary.prop]p4:
472 // T is a class type [...] with [...] no virtual member functions...
473 data().Empty = false;
475 // C++ [class.virtual]p1:
476 // A class that declares or inherits a virtual function is called a
477 // polymorphic class.
478 data().Polymorphic = true;
480 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
481 // A [default constructor, copy/move constructor, or copy/move
482 // assignment operator for a class X] is trivial [...] if:
483 // -- class X has no virtual functions [...]
484 data().HasTrivialSpecialMembers &= SMF_Destructor;
487 // A standard-layout class is a class that: [...]
488 // -- has no virtual functions
489 data().IsStandardLayout = false;
493 // Notify the listener if an implicit member was added after the definition
495 if (!isBeingDefined() && D->isImplicit())
496 if (ASTMutationListener *L = getASTMutationListener())
497 L->AddedCXXImplicitMember(data().Definition, D);
499 // The kind of special member this declaration is, if any.
502 // Handle constructors.
503 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
504 if (!Constructor->isImplicit()) {
505 // Note that we have a user-declared constructor.
506 data().UserDeclaredConstructor = true;
509 // A POD-struct is an aggregate class [...]
510 // Since the POD bit is meant to be C++03 POD-ness, clear it even if the
511 // type is technically an aggregate in C++0x since it wouldn't be in 03.
512 data().PlainOldData = false;
515 if (Constructor->isDefaultConstructor()) {
516 SMKind |= SMF_DefaultConstructor;
518 if (Constructor->isUserProvided())
519 data().UserProvidedDefaultConstructor = true;
520 if (Constructor->isConstexpr())
521 data().HasConstexprDefaultConstructor = true;
522 if (Constructor->isDefaulted())
523 data().HasDefaultedDefaultConstructor = true;
528 if (Constructor->isCopyConstructor(Quals)) {
529 SMKind |= SMF_CopyConstructor;
531 if (Quals & Qualifiers::Const)
532 data().HasDeclaredCopyConstructorWithConstParam = true;
533 } else if (Constructor->isMoveConstructor())
534 SMKind |= SMF_MoveConstructor;
538 // Handle constructors, including those inherited from base classes.
539 if (CXXConstructorDecl *Constructor =
540 dyn_cast<CXXConstructorDecl>(DUnderlying)) {
541 // Record if we see any constexpr constructors which are neither copy
542 // nor move constructors.
543 // C++1z [basic.types]p10:
544 // [...] has at least one constexpr constructor or constructor template
545 // (possibly inherited from a base class) that is not a copy or move
547 if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
548 data().HasConstexprNonCopyMoveConstructor = true;
550 // C++ [dcl.init.aggr]p1:
551 // An aggregate is an array or a class with no user-declared
552 // constructors [...].
553 // C++11 [dcl.init.aggr]p1:
554 // An aggregate is an array or a class with no user-provided
555 // constructors [...].
556 // C++11 [dcl.init.aggr]p1:
557 // An aggregate is an array or a class with no user-provided
558 // constructors (including those inherited from a base class) [...].
559 if (getASTContext().getLangOpts().CPlusPlus11
560 ? Constructor->isUserProvided()
561 : !Constructor->isImplicit())
562 data().Aggregate = false;
565 // Handle destructors.
566 if (CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) {
567 SMKind |= SMF_Destructor;
569 if (DD->isUserProvided())
570 data().HasIrrelevantDestructor = false;
571 // If the destructor is explicitly defaulted and not trivial or not public
572 // or if the destructor is deleted, we clear HasIrrelevantDestructor in
573 // finishedDefaultedOrDeletedMember.
575 // C++11 [class.dtor]p5:
576 // A destructor is trivial if [...] the destructor is not virtual.
578 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
581 // Handle member functions.
582 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
583 if (Method->isCopyAssignmentOperator()) {
584 SMKind |= SMF_CopyAssignment;
586 const ReferenceType *ParamTy =
587 Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
588 if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
589 data().HasDeclaredCopyAssignmentWithConstParam = true;
592 if (Method->isMoveAssignmentOperator())
593 SMKind |= SMF_MoveAssignment;
595 // Keep the list of conversion functions up-to-date.
596 if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
597 // FIXME: We use the 'unsafe' accessor for the access specifier here,
598 // because Sema may not have set it yet. That's really just a misdesign
599 // in Sema. However, LLDB *will* have set the access specifier correctly,
600 // and adds declarations after the class is technically completed,
601 // so completeDefinition()'s overriding of the access specifiers doesn't
603 AccessSpecifier AS = Conversion->getAccessUnsafe();
605 if (Conversion->getPrimaryTemplate()) {
606 // We don't record specializations.
608 ASTContext &Ctx = getASTContext();
609 ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
611 FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
612 if (Primary->getPreviousDecl())
613 Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
616 Conversions.addDecl(Ctx, Primary, AS);
621 // If this is the first declaration of a special member, we no longer have
622 // an implicit trivial special member.
623 data().HasTrivialSpecialMembers &=
624 data().DeclaredSpecialMembers | ~SMKind;
626 if (!Method->isImplicit() && !Method->isUserProvided()) {
627 // This method is user-declared but not user-provided. We can't work out
628 // whether it's trivial yet (not until we get to the end of the class).
629 // We'll handle this method in finishedDefaultedOrDeletedMember.
630 } else if (Method->isTrivial())
631 data().HasTrivialSpecialMembers |= SMKind;
633 data().DeclaredNonTrivialSpecialMembers |= SMKind;
635 // Note when we have declared a declared special member, and suppress the
636 // implicit declaration of this special member.
637 data().DeclaredSpecialMembers |= SMKind;
639 if (!Method->isImplicit()) {
640 data().UserDeclaredSpecialMembers |= SMKind;
643 // A POD-struct is an aggregate class that has [...] no user-defined
644 // copy assignment operator and no user-defined destructor.
646 // Since the POD bit is meant to be C++03 POD-ness, and in C++03,
647 // aggregates could not have any constructors, clear it even for an
648 // explicitly defaulted or deleted constructor.
649 // type is technically an aggregate in C++0x since it wouldn't be in 03.
651 // Also, a user-declared move assignment operator makes a class non-POD.
652 // This is an extension in C++03.
653 data().PlainOldData = false;
660 // Handle non-static data members.
661 if (FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
662 // C++ [class.bit]p2:
663 // A declaration for a bit-field that omits the identifier declares an
664 // unnamed bit-field. Unnamed bit-fields are not members and cannot be
666 if (Field->isUnnamedBitfield())
669 // C++ [dcl.init.aggr]p1:
670 // An aggregate is an array or a class (clause 9) with [...] no
671 // private or protected non-static data members (clause 11).
673 // A POD must be an aggregate.
674 if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
675 data().Aggregate = false;
676 data().PlainOldData = false;
680 // A standard-layout class is a class that:
682 // -- has the same access control for all non-static data members,
683 switch (D->getAccess()) {
684 case AS_private: data().HasPrivateFields = true; break;
685 case AS_protected: data().HasProtectedFields = true; break;
686 case AS_public: data().HasPublicFields = true; break;
687 case AS_none: llvm_unreachable("Invalid access specifier");
689 if ((data().HasPrivateFields + data().HasProtectedFields +
690 data().HasPublicFields) > 1)
691 data().IsStandardLayout = false;
693 // Keep track of the presence of mutable fields.
694 if (Field->isMutable())
695 data().HasMutableFields = true;
697 // C++11 [class.union]p8, DR1460:
698 // If X is a union, a non-static data member of X that is not an anonymous
699 // union is a variant member of X.
700 if (isUnion() && !Field->isAnonymousStructOrUnion())
701 data().HasVariantMembers = true;
704 // A POD struct is a class that is both a trivial class and a
705 // standard-layout class, and has no non-static data members of type
706 // non-POD struct, non-POD union (or array of such types).
708 // Automatic Reference Counting: the presence of a member of Objective-C pointer type
709 // that does not explicitly have no lifetime makes the class a non-POD.
710 ASTContext &Context = getASTContext();
711 QualType T = Context.getBaseElementType(Field->getType());
712 if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
713 if (!Context.getLangOpts().ObjCAutoRefCount) {
714 setHasObjectMember(true);
715 } else if (T.getObjCLifetime() != Qualifiers::OCL_ExplicitNone) {
716 // Objective-C Automatic Reference Counting:
717 // If a class has a non-static data member of Objective-C pointer
718 // type (or array thereof), it is a non-POD type and its
719 // default constructor (if any), copy constructor, move constructor,
720 // copy assignment operator, move assignment operator, and destructor are
722 setHasObjectMember(true);
723 struct DefinitionData &Data = data();
724 Data.PlainOldData = false;
725 Data.HasTrivialSpecialMembers = 0;
726 Data.HasIrrelevantDestructor = false;
728 } else if (!T.isCXX98PODType(Context))
729 data().PlainOldData = false;
731 if (T->isReferenceType()) {
732 if (!Field->hasInClassInitializer())
733 data().HasUninitializedReferenceMember = true;
736 // A standard-layout class is a class that:
737 // -- has no non-static data members of type [...] reference,
738 data().IsStandardLayout = false;
741 if (!Field->hasInClassInitializer() && !Field->isMutable()) {
742 if (CXXRecordDecl *FieldType = Field->getType()->getAsCXXRecordDecl()) {
743 if (FieldType->hasDefinition() && !FieldType->allowConstDefaultInit())
744 data().HasUninitializedFields = true;
746 data().HasUninitializedFields = true;
750 // Record if this field is the first non-literal or volatile field or base.
751 if (!T->isLiteralType(Context) || T.isVolatileQualified())
752 data().HasNonLiteralTypeFieldsOrBases = true;
754 if (Field->hasInClassInitializer() ||
755 (Field->isAnonymousStructOrUnion() &&
756 Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
757 data().HasInClassInitializer = true;
760 // A default constructor is trivial if [...] no non-static data member
761 // of its class has a brace-or-equal-initializer.
762 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
764 // C++11 [dcl.init.aggr]p1:
765 // An aggregate is a [...] class with [...] no
766 // brace-or-equal-initializers for non-static data members.
768 // This rule was removed in C++14.
769 if (!getASTContext().getLangOpts().CPlusPlus14)
770 data().Aggregate = false;
773 // A POD struct is [...] a trivial class.
774 data().PlainOldData = false;
777 // C++11 [class.copy]p23:
778 // A defaulted copy/move assignment operator for a class X is defined
779 // as deleted if X has:
780 // -- a non-static data member of reference type
781 if (T->isReferenceType())
782 data().DefaultedMoveAssignmentIsDeleted = true;
784 if (const RecordType *RecordTy = T->getAs<RecordType>()) {
785 CXXRecordDecl* FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
786 if (FieldRec->getDefinition()) {
787 addedClassSubobject(FieldRec);
789 // We may need to perform overload resolution to determine whether a
790 // field can be moved if it's const or volatile qualified.
791 if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
792 data().NeedOverloadResolutionForMoveConstructor = true;
793 data().NeedOverloadResolutionForMoveAssignment = true;
796 // C++11 [class.ctor]p5, C++11 [class.copy]p11:
797 // A defaulted [special member] for a class X is defined as
799 // -- X is a union-like class that has a variant member with a
800 // non-trivial [corresponding special member]
802 if (FieldRec->hasNonTrivialMoveConstructor())
803 data().DefaultedMoveConstructorIsDeleted = true;
804 if (FieldRec->hasNonTrivialMoveAssignment())
805 data().DefaultedMoveAssignmentIsDeleted = true;
806 if (FieldRec->hasNonTrivialDestructor())
807 data().DefaultedDestructorIsDeleted = true;
810 // For an anonymous union member, our overload resolution will perform
811 // overload resolution for its members.
812 if (Field->isAnonymousStructOrUnion()) {
813 data().NeedOverloadResolutionForMoveConstructor |=
814 FieldRec->data().NeedOverloadResolutionForMoveConstructor;
815 data().NeedOverloadResolutionForMoveAssignment |=
816 FieldRec->data().NeedOverloadResolutionForMoveAssignment;
817 data().NeedOverloadResolutionForDestructor |=
818 FieldRec->data().NeedOverloadResolutionForDestructor;
821 // C++0x [class.ctor]p5:
822 // A default constructor is trivial [...] if:
823 // -- for all the non-static data members of its class that are of
824 // class type (or array thereof), each such class has a trivial
825 // default constructor.
826 if (!FieldRec->hasTrivialDefaultConstructor())
827 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
829 // C++0x [class.copy]p13:
830 // A copy/move constructor for class X is trivial if [...]
832 // -- for each non-static data member of X that is of class type (or
833 // an array thereof), the constructor selected to copy/move that
834 // member is trivial;
835 if (!FieldRec->hasTrivialCopyConstructor())
836 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
837 // If the field doesn't have a simple move constructor, we'll eagerly
838 // declare the move constructor for this class and we'll decide whether
839 // it's trivial then.
840 if (!FieldRec->hasTrivialMoveConstructor())
841 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
843 // C++0x [class.copy]p27:
844 // A copy/move assignment operator for class X is trivial if [...]
846 // -- for each non-static data member of X that is of class type (or
847 // an array thereof), the assignment operator selected to
848 // copy/move that member is trivial;
849 if (!FieldRec->hasTrivialCopyAssignment())
850 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
851 // If the field doesn't have a simple move assignment, we'll eagerly
852 // declare the move assignment for this class and we'll decide whether
853 // it's trivial then.
854 if (!FieldRec->hasTrivialMoveAssignment())
855 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
857 if (!FieldRec->hasTrivialDestructor())
858 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
859 if (!FieldRec->hasIrrelevantDestructor())
860 data().HasIrrelevantDestructor = false;
861 if (FieldRec->hasObjectMember())
862 setHasObjectMember(true);
863 if (FieldRec->hasVolatileMember())
864 setHasVolatileMember(true);
867 // A standard-layout class is a class that:
868 // -- has no non-static data members of type non-standard-layout
869 // class (or array of such types) [...]
870 if (!FieldRec->isStandardLayout())
871 data().IsStandardLayout = false;
874 // A standard-layout class is a class that:
876 // -- has no base classes of the same type as the first non-static
878 // We don't want to expend bits in the state of the record decl
879 // tracking whether this is the first non-static data member so we
880 // cheat a bit and use some of the existing state: the empty bit.
881 // Virtual bases and virtual methods make a class non-empty, but they
882 // also make it non-standard-layout so we needn't check here.
883 // A non-empty base class may leave the class standard-layout, but not
884 // if we have arrived here, and have at least one non-static data
885 // member. If IsStandardLayout remains true, then the first non-static
886 // data member must come through here with Empty still true, and Empty
887 // will subsequently be set to false below.
888 if (data().IsStandardLayout && data().Empty) {
889 for (const auto &BI : bases()) {
890 if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
891 data().IsStandardLayout = false;
897 // Keep track of the presence of mutable fields.
898 if (FieldRec->hasMutableFields())
899 data().HasMutableFields = true;
901 // C++11 [class.copy]p13:
902 // If the implicitly-defined constructor would satisfy the
903 // requirements of a constexpr constructor, the implicitly-defined
904 // constructor is constexpr.
905 // C++11 [dcl.constexpr]p4:
906 // -- every constructor involved in initializing non-static data
907 // members [...] shall be a constexpr constructor
908 if (!Field->hasInClassInitializer() &&
909 !FieldRec->hasConstexprDefaultConstructor() && !isUnion())
910 // The standard requires any in-class initializer to be a constant
911 // expression. We consider this to be a defect.
912 data().DefaultedDefaultConstructorIsConstexpr = false;
914 // C++11 [class.copy]p8:
915 // The implicitly-declared copy constructor for a class X will have
916 // the form 'X::X(const X&)' if [...] for all the non-static data
917 // members of X that are of a class type M (or array thereof), each
918 // such class type has a copy constructor whose first parameter is
919 // of type 'const M&' or 'const volatile M&'.
920 if (!FieldRec->hasCopyConstructorWithConstParam())
921 data().ImplicitCopyConstructorHasConstParam = false;
923 // C++11 [class.copy]p18:
924 // The implicitly-declared copy assignment oeprator for a class X will
925 // have the form 'X& X::operator=(const X&)' if [...] for all the
926 // non-static data members of X that are of a class type M (or array
927 // thereof), each such class type has a copy assignment operator whose
928 // parameter is of type 'const M&', 'const volatile M&' or 'M'.
929 if (!FieldRec->hasCopyAssignmentWithConstParam())
930 data().ImplicitCopyAssignmentHasConstParam = false;
932 if (FieldRec->hasUninitializedReferenceMember() &&
933 !Field->hasInClassInitializer())
934 data().HasUninitializedReferenceMember = true;
936 // C++11 [class.union]p8, DR1460:
937 // a non-static data member of an anonymous union that is a member of
938 // X is also a variant member of X.
939 if (FieldRec->hasVariantMembers() &&
940 Field->isAnonymousStructOrUnion())
941 data().HasVariantMembers = true;
944 // Base element type of field is a non-class type.
945 if (!T->isLiteralType(Context) ||
946 (!Field->hasInClassInitializer() && !isUnion()))
947 data().DefaultedDefaultConstructorIsConstexpr = false;
949 // C++11 [class.copy]p23:
950 // A defaulted copy/move assignment operator for a class X is defined
951 // as deleted if X has:
952 // -- a non-static data member of const non-class type (or array
954 if (T.isConstQualified())
955 data().DefaultedMoveAssignmentIsDeleted = true;
959 // A standard-layout class is a class that:
961 // -- either has no non-static data members in the most derived
962 // class and at most one base class with non-static data members,
963 // or has no base classes with non-static data members, and
964 // At this point we know that we have a non-static data member, so the last
966 if (!data().HasNoNonEmptyBases)
967 data().IsStandardLayout = false;
969 // C++14 [meta.unary.prop]p4:
970 // T is a class type [...] with [...] no non-static data members other
971 // than bit-fields of length 0...
973 if (!Field->isBitField() ||
974 (!Field->getBitWidth()->isTypeDependent() &&
975 !Field->getBitWidth()->isValueDependent() &&
976 Field->getBitWidthValue(Context) != 0))
977 data().Empty = false;
981 // Handle using declarations of conversion functions.
982 if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(D)) {
983 if (Shadow->getDeclName().getNameKind()
984 == DeclarationName::CXXConversionFunctionName) {
985 ASTContext &Ctx = getASTContext();
986 data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
990 if (UsingDecl *Using = dyn_cast<UsingDecl>(D)) {
991 if (Using->getDeclName().getNameKind() ==
992 DeclarationName::CXXConstructorName)
993 data().HasInheritedConstructor = true;
995 if (Using->getDeclName().getCXXOverloadedOperator() == OO_Equal)
996 data().HasInheritedAssignment = true;
1000 void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
1001 assert(!D->isImplicit() && !D->isUserProvided());
1003 // The kind of special member this declaration is, if any.
1004 unsigned SMKind = 0;
1006 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1007 if (Constructor->isDefaultConstructor()) {
1008 SMKind |= SMF_DefaultConstructor;
1009 if (Constructor->isConstexpr())
1010 data().HasConstexprDefaultConstructor = true;
1012 if (Constructor->isCopyConstructor())
1013 SMKind |= SMF_CopyConstructor;
1014 else if (Constructor->isMoveConstructor())
1015 SMKind |= SMF_MoveConstructor;
1016 else if (Constructor->isConstexpr())
1017 // We may now know that the constructor is constexpr.
1018 data().HasConstexprNonCopyMoveConstructor = true;
1019 } else if (isa<CXXDestructorDecl>(D)) {
1020 SMKind |= SMF_Destructor;
1021 if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
1022 data().HasIrrelevantDestructor = false;
1023 } else if (D->isCopyAssignmentOperator())
1024 SMKind |= SMF_CopyAssignment;
1025 else if (D->isMoveAssignmentOperator())
1026 SMKind |= SMF_MoveAssignment;
1028 // Update which trivial / non-trivial special members we have.
1029 // addedMember will have skipped this step for this member.
1031 data().HasTrivialSpecialMembers |= SMKind;
1033 data().DeclaredNonTrivialSpecialMembers |= SMKind;
1036 bool CXXRecordDecl::isCLike() const {
1037 if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
1038 !TemplateOrInstantiation.isNull())
1040 if (!hasDefinition())
1043 return isPOD() && data().HasOnlyCMembers;
1046 bool CXXRecordDecl::isGenericLambda() const {
1047 if (!isLambda()) return false;
1048 return getLambdaData().IsGenericLambda;
1051 CXXMethodDecl* CXXRecordDecl::getLambdaCallOperator() const {
1052 if (!isLambda()) return nullptr;
1053 DeclarationName Name =
1054 getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
1055 DeclContext::lookup_result Calls = lookup(Name);
1057 assert(!Calls.empty() && "Missing lambda call operator!");
1058 assert(Calls.size() == 1 && "More than one lambda call operator!");
1060 NamedDecl *CallOp = Calls.front();
1061 if (FunctionTemplateDecl *CallOpTmpl =
1062 dyn_cast<FunctionTemplateDecl>(CallOp))
1063 return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
1065 return cast<CXXMethodDecl>(CallOp);
1068 CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
1069 if (!isLambda()) return nullptr;
1070 DeclarationName Name =
1071 &getASTContext().Idents.get(getLambdaStaticInvokerName());
1072 DeclContext::lookup_result Invoker = lookup(Name);
1073 if (Invoker.empty()) return nullptr;
1074 assert(Invoker.size() == 1 && "More than one static invoker operator!");
1075 NamedDecl *InvokerFun = Invoker.front();
1076 if (FunctionTemplateDecl *InvokerTemplate =
1077 dyn_cast<FunctionTemplateDecl>(InvokerFun))
1078 return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
1080 return cast<CXXMethodDecl>(InvokerFun);
1083 void CXXRecordDecl::getCaptureFields(
1084 llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1085 FieldDecl *&ThisCapture) const {
1087 ThisCapture = nullptr;
1089 LambdaDefinitionData &Lambda = getLambdaData();
1090 RecordDecl::field_iterator Field = field_begin();
1091 for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
1092 C != CEnd; ++C, ++Field) {
1093 if (C->capturesThis())
1094 ThisCapture = *Field;
1095 else if (C->capturesVariable())
1096 Captures[C->getCapturedVar()] = *Field;
1098 assert(Field == field_end());
1101 TemplateParameterList *
1102 CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
1103 if (!isLambda()) return nullptr;
1104 CXXMethodDecl *CallOp = getLambdaCallOperator();
1105 if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
1106 return Tmpl->getTemplateParameters();
1110 static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
1112 cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
1113 ->getConversionType();
1114 return Context.getCanonicalType(T);
1117 /// Collect the visible conversions of a base class.
1119 /// \param Record a base class of the class we're considering
1120 /// \param InVirtual whether this base class is a virtual base (or a base
1121 /// of a virtual base)
1122 /// \param Access the access along the inheritance path to this base
1123 /// \param ParentHiddenTypes the conversions provided by the inheritors
1125 /// \param Output the set to which to add conversions from non-virtual bases
1126 /// \param VOutput the set to which to add conversions from virtual bases
1127 /// \param HiddenVBaseCs the set of conversions which were hidden in a
1128 /// virtual base along some inheritance path
1129 static void CollectVisibleConversions(ASTContext &Context,
1130 CXXRecordDecl *Record,
1132 AccessSpecifier Access,
1133 const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
1134 ASTUnresolvedSet &Output,
1135 UnresolvedSetImpl &VOutput,
1136 llvm::SmallPtrSet<NamedDecl*, 8> &HiddenVBaseCs) {
1137 // The set of types which have conversions in this class or its
1138 // subclasses. As an optimization, we don't copy the derived set
1139 // unless it might change.
1140 const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
1141 llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
1143 // Collect the direct conversions and figure out which conversions
1144 // will be hidden in the subclasses.
1145 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1146 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1147 if (ConvI != ConvE) {
1148 HiddenTypesBuffer = ParentHiddenTypes;
1149 HiddenTypes = &HiddenTypesBuffer;
1151 for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
1152 CanQualType ConvType(GetConversionType(Context, I.getDecl()));
1153 bool Hidden = ParentHiddenTypes.count(ConvType);
1155 HiddenTypesBuffer.insert(ConvType);
1157 // If this conversion is hidden and we're in a virtual base,
1158 // remember that it's hidden along some inheritance path.
1159 if (Hidden && InVirtual)
1160 HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
1162 // If this conversion isn't hidden, add it to the appropriate output.
1164 AccessSpecifier IAccess
1165 = CXXRecordDecl::MergeAccess(Access, I.getAccess());
1168 VOutput.addDecl(I.getDecl(), IAccess);
1170 Output.addDecl(Context, I.getDecl(), IAccess);
1175 // Collect information recursively from any base classes.
1176 for (const auto &I : Record->bases()) {
1177 const RecordType *RT = I.getType()->getAs<RecordType>();
1180 AccessSpecifier BaseAccess
1181 = CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
1182 bool BaseInVirtual = InVirtual || I.isVirtual();
1184 CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
1185 CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
1186 *HiddenTypes, Output, VOutput, HiddenVBaseCs);
1190 /// Collect the visible conversions of a class.
1192 /// This would be extremely straightforward if it weren't for virtual
1193 /// bases. It might be worth special-casing that, really.
1194 static void CollectVisibleConversions(ASTContext &Context,
1195 CXXRecordDecl *Record,
1196 ASTUnresolvedSet &Output) {
1197 // The collection of all conversions in virtual bases that we've
1198 // found. These will be added to the output as long as they don't
1199 // appear in the hidden-conversions set.
1200 UnresolvedSet<8> VBaseCs;
1202 // The set of conversions in virtual bases that we've determined to
1204 llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
1206 // The set of types hidden by classes derived from this one.
1207 llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
1209 // Go ahead and collect the direct conversions and add them to the
1210 // hidden-types set.
1211 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1212 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1213 Output.append(Context, ConvI, ConvE);
1214 for (; ConvI != ConvE; ++ConvI)
1215 HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
1217 // Recursively collect conversions from base classes.
1218 for (const auto &I : Record->bases()) {
1219 const RecordType *RT = I.getType()->getAs<RecordType>();
1222 CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
1223 I.isVirtual(), I.getAccessSpecifier(),
1224 HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
1227 // Add any unhidden conversions provided by virtual bases.
1228 for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
1230 if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
1231 Output.addDecl(Context, I.getDecl(), I.getAccess());
1235 /// getVisibleConversionFunctions - get all conversion functions visible
1236 /// in current class; including conversion function templates.
1237 llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1238 CXXRecordDecl::getVisibleConversionFunctions() {
1239 ASTContext &Ctx = getASTContext();
1241 ASTUnresolvedSet *Set;
1242 if (bases_begin() == bases_end()) {
1243 // If root class, all conversions are visible.
1244 Set = &data().Conversions.get(Ctx);
1246 Set = &data().VisibleConversions.get(Ctx);
1247 // If visible conversion list is not evaluated, evaluate it.
1248 if (!data().ComputedVisibleConversions) {
1249 CollectVisibleConversions(Ctx, this, *Set);
1250 data().ComputedVisibleConversions = true;
1253 return llvm::make_range(Set->begin(), Set->end());
1256 void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
1257 // This operation is O(N) but extremely rare. Sema only uses it to
1258 // remove UsingShadowDecls in a class that were followed by a direct
1259 // declaration, e.g.:
1261 // using B::operator int;
1264 // This is uncommon by itself and even more uncommon in conjunction
1265 // with sufficiently large numbers of directly-declared conversions
1266 // that asymptotic behavior matters.
1268 ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
1269 for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
1270 if (Convs[I].getDecl() == ConvDecl) {
1272 assert(std::find(Convs.begin(), Convs.end(), ConvDecl) == Convs.end()
1273 && "conversion was found multiple times in unresolved set");
1278 llvm_unreachable("conversion not found in set!");
1281 CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
1282 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1283 return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
1288 MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
1289 return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1293 CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
1294 TemplateSpecializationKind TSK) {
1295 assert(TemplateOrInstantiation.isNull() &&
1296 "Previous template or instantiation?");
1297 assert(!isa<ClassTemplatePartialSpecializationDecl>(this));
1298 TemplateOrInstantiation
1299 = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1302 ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
1303 return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1306 void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
1307 TemplateOrInstantiation = Template;
1310 TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
1311 if (const ClassTemplateSpecializationDecl *Spec
1312 = dyn_cast<ClassTemplateSpecializationDecl>(this))
1313 return Spec->getSpecializationKind();
1315 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1316 return MSInfo->getTemplateSpecializationKind();
1318 return TSK_Undeclared;
1322 CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
1323 if (ClassTemplateSpecializationDecl *Spec
1324 = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1325 Spec->setSpecializationKind(TSK);
1329 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1330 MSInfo->setTemplateSpecializationKind(TSK);
1334 llvm_unreachable("Not a class template or member class specialization");
1337 const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
1338 // If it's a class template specialization, find the template or partial
1339 // specialization from which it was instantiated.
1340 if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1341 auto From = TD->getInstantiatedFrom();
1342 if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
1343 while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
1344 if (NewCTD->isMemberSpecialization())
1348 return CTD->getTemplatedDecl()->getDefinition();
1351 From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
1352 while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
1353 if (NewCTPSD->isMemberSpecialization())
1357 return CTPSD->getDefinition();
1361 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1362 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
1363 const CXXRecordDecl *RD = this;
1364 while (auto *NewRD = RD->getInstantiatedFromMemberClass())
1366 return RD->getDefinition();
1370 assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&
1371 "couldn't find pattern for class template instantiation");
1375 CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
1376 ASTContext &Context = getASTContext();
1377 QualType ClassType = Context.getTypeDeclType(this);
1379 DeclarationName Name
1380 = Context.DeclarationNames.getCXXDestructorName(
1381 Context.getCanonicalType(ClassType));
1383 DeclContext::lookup_result R = lookup(Name);
1387 CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(R.front());
1391 bool CXXRecordDecl::isAnyDestructorNoReturn() const {
1392 // Destructor is noreturn.
1393 if (const CXXDestructorDecl *Destructor = getDestructor())
1394 if (Destructor->isNoReturn())
1397 // Check base classes destructor for noreturn.
1398 for (const auto &Base : bases())
1399 if (Base.getType()->getAsCXXRecordDecl()->isAnyDestructorNoReturn())
1402 // Check fields for noreturn.
1403 for (const auto *Field : fields())
1404 if (const CXXRecordDecl *RD =
1405 Field->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl())
1406 if (RD->isAnyDestructorNoReturn())
1409 // All destructors are not noreturn.
1413 void CXXRecordDecl::completeDefinition() {
1414 completeDefinition(nullptr);
1417 void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
1418 RecordDecl::completeDefinition();
1420 // If the class may be abstract (but hasn't been marked as such), check for
1421 // any pure final overriders.
1422 if (mayBeAbstract()) {
1423 CXXFinalOverriderMap MyFinalOverriders;
1424 if (!FinalOverriders) {
1425 getFinalOverriders(MyFinalOverriders);
1426 FinalOverriders = &MyFinalOverriders;
1430 for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
1431 MEnd = FinalOverriders->end();
1432 M != MEnd && !Done; ++M) {
1433 for (OverridingMethods::iterator SO = M->second.begin(),
1434 SOEnd = M->second.end();
1435 SO != SOEnd && !Done; ++SO) {
1436 assert(SO->second.size() > 0 &&
1437 "All virtual functions have overridding virtual functions");
1439 // C++ [class.abstract]p4:
1440 // A class is abstract if it contains or inherits at least one
1441 // pure virtual function for which the final overrider is pure
1443 if (SO->second.front().Method->isPure()) {
1444 data().Abstract = true;
1452 // Set access bits correctly on the directly-declared conversions.
1453 for (conversion_iterator I = conversion_begin(), E = conversion_end();
1455 I.setAccess((*I)->getAccess());
1458 bool CXXRecordDecl::mayBeAbstract() const {
1459 if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
1460 isDependentContext())
1463 for (const auto &B : bases()) {
1464 CXXRecordDecl *BaseDecl
1465 = cast<CXXRecordDecl>(B.getType()->getAs<RecordType>()->getDecl());
1466 if (BaseDecl->isAbstract())
1473 void CXXMethodDecl::anchor() { }
1475 bool CXXMethodDecl::isStatic() const {
1476 const CXXMethodDecl *MD = getCanonicalDecl();
1478 if (MD->getStorageClass() == SC_Static)
1481 OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
1482 return isStaticOverloadedOperator(OOK);
1485 static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
1486 const CXXMethodDecl *BaseMD) {
1487 for (CXXMethodDecl::method_iterator I = DerivedMD->begin_overridden_methods(),
1488 E = DerivedMD->end_overridden_methods(); I != E; ++I) {
1489 const CXXMethodDecl *MD = *I;
1490 if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
1492 if (recursivelyOverrides(MD, BaseMD))
1499 CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
1501 if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
1504 // Lookup doesn't work for destructors, so handle them separately.
1505 if (isa<CXXDestructorDecl>(this)) {
1506 CXXMethodDecl *MD = RD->getDestructor();
1508 if (recursivelyOverrides(MD, this))
1510 if (MayBeBase && recursivelyOverrides(this, MD))
1516 for (auto *ND : RD->lookup(getDeclName())) {
1517 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND);
1520 if (recursivelyOverrides(MD, this))
1522 if (MayBeBase && recursivelyOverrides(this, MD))
1526 for (const auto &I : RD->bases()) {
1527 const RecordType *RT = I.getType()->getAs<RecordType>();
1530 const CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
1531 CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
1540 CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1541 SourceLocation StartLoc,
1542 const DeclarationNameInfo &NameInfo,
1543 QualType T, TypeSourceInfo *TInfo,
1544 StorageClass SC, bool isInline,
1545 bool isConstexpr, SourceLocation EndLocation) {
1546 return new (C, RD) CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo,
1547 T, TInfo, SC, isInline, isConstexpr,
1551 CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1552 return new (C, ID) CXXMethodDecl(CXXMethod, C, nullptr, SourceLocation(),
1553 DeclarationNameInfo(), QualType(), nullptr,
1554 SC_None, false, false, SourceLocation());
1557 bool CXXMethodDecl::isUsualDeallocationFunction() const {
1558 if (getOverloadedOperator() != OO_Delete &&
1559 getOverloadedOperator() != OO_Array_Delete)
1562 // C++ [basic.stc.dynamic.deallocation]p2:
1563 // A template instance is never a usual deallocation function,
1564 // regardless of its signature.
1565 if (getPrimaryTemplate())
1568 // C++ [basic.stc.dynamic.deallocation]p2:
1569 // If a class T has a member deallocation function named operator delete
1570 // with exactly one parameter, then that function is a usual (non-placement)
1571 // deallocation function. [...]
1572 if (getNumParams() == 1)
1575 // C++ [basic.stc.dynamic.deallocation]p2:
1576 // [...] If class T does not declare such an operator delete but does
1577 // declare a member deallocation function named operator delete with
1578 // exactly two parameters, the second of which has type std::size_t (18.1),
1579 // then this function is a usual deallocation function.
1580 ASTContext &Context = getASTContext();
1581 if (getNumParams() != 2 ||
1582 !Context.hasSameUnqualifiedType(getParamDecl(1)->getType(),
1583 Context.getSizeType()))
1586 // This function is a usual deallocation function if there are no
1587 // single-parameter deallocation functions of the same kind.
1588 DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
1589 for (DeclContext::lookup_result::iterator I = R.begin(), E = R.end();
1591 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I))
1592 if (FD->getNumParams() == 1)
1599 bool CXXMethodDecl::isCopyAssignmentOperator() const {
1600 // C++0x [class.copy]p17:
1601 // A user-declared copy assignment operator X::operator= is a non-static
1602 // non-template member function of class X with exactly one parameter of
1603 // type X, X&, const X&, volatile X& or const volatile X&.
1604 if (/*operator=*/getOverloadedOperator() != OO_Equal ||
1605 /*non-static*/ isStatic() ||
1606 /*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
1607 getNumParams() != 1)
1610 QualType ParamType = getParamDecl(0)->getType();
1611 if (const LValueReferenceType *Ref = ParamType->getAs<LValueReferenceType>())
1612 ParamType = Ref->getPointeeType();
1614 ASTContext &Context = getASTContext();
1616 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
1617 return Context.hasSameUnqualifiedType(ClassType, ParamType);
1620 bool CXXMethodDecl::isMoveAssignmentOperator() const {
1621 // C++0x [class.copy]p19:
1622 // A user-declared move assignment operator X::operator= is a non-static
1623 // non-template member function of class X with exactly one parameter of type
1624 // X&&, const X&&, volatile X&&, or const volatile X&&.
1625 if (getOverloadedOperator() != OO_Equal || isStatic() ||
1626 getPrimaryTemplate() || getDescribedFunctionTemplate() ||
1627 getNumParams() != 1)
1630 QualType ParamType = getParamDecl(0)->getType();
1631 if (!isa<RValueReferenceType>(ParamType))
1633 ParamType = ParamType->getPointeeType();
1635 ASTContext &Context = getASTContext();
1637 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
1638 return Context.hasSameUnqualifiedType(ClassType, ParamType);
1641 void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
1642 assert(MD->isCanonicalDecl() && "Method is not canonical!");
1643 assert(!MD->getParent()->isDependentContext() &&
1644 "Can't add an overridden method to a class template!");
1645 assert(MD->isVirtual() && "Method is not virtual!");
1647 getASTContext().addOverriddenMethod(this, MD);
1650 CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
1651 if (isa<CXXConstructorDecl>(this)) return nullptr;
1652 return getASTContext().overridden_methods_begin(this);
1655 CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
1656 if (isa<CXXConstructorDecl>(this)) return nullptr;
1657 return getASTContext().overridden_methods_end(this);
1660 unsigned CXXMethodDecl::size_overridden_methods() const {
1661 if (isa<CXXConstructorDecl>(this)) return 0;
1662 return getASTContext().overridden_methods_size(this);
1665 CXXMethodDecl::overridden_method_range
1666 CXXMethodDecl::overridden_methods() const {
1667 if (isa<CXXConstructorDecl>(this))
1668 return overridden_method_range(nullptr, nullptr);
1669 return getASTContext().overridden_methods(this);
1672 QualType CXXMethodDecl::getThisType(ASTContext &C) const {
1673 // C++ 9.3.2p1: The type of this in a member function of a class X is X*.
1674 // If the member function is declared const, the type of this is const X*,
1675 // if the member function is declared volatile, the type of this is
1676 // volatile X*, and if the member function is declared const volatile,
1677 // the type of this is const volatile X*.
1679 assert(isInstance() && "No 'this' for static methods!");
1681 QualType ClassTy = C.getTypeDeclType(getParent());
1682 ClassTy = C.getQualifiedType(ClassTy,
1683 Qualifiers::fromCVRUMask(getTypeQualifiers()));
1684 return C.getPointerType(ClassTy);
1687 bool CXXMethodDecl::hasInlineBody() const {
1688 // If this function is a template instantiation, look at the template from
1689 // which it was instantiated.
1690 const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
1694 const FunctionDecl *fn;
1695 return CheckFn->hasBody(fn) && !fn->isOutOfLine();
1698 bool CXXMethodDecl::isLambdaStaticInvoker() const {
1699 const CXXRecordDecl *P = getParent();
1700 if (P->isLambda()) {
1701 if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
1702 if (StaticInvoker == this) return true;
1703 if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
1704 return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
1710 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1711 TypeSourceInfo *TInfo, bool IsVirtual,
1712 SourceLocation L, Expr *Init,
1714 SourceLocation EllipsisLoc)
1715 : Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
1716 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
1717 IsWritten(false), SourceOrderOrNumArrayIndices(0)
1721 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1723 SourceLocation MemberLoc,
1724 SourceLocation L, Expr *Init,
1726 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1727 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1728 IsWritten(false), SourceOrderOrNumArrayIndices(0)
1732 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1733 IndirectFieldDecl *Member,
1734 SourceLocation MemberLoc,
1735 SourceLocation L, Expr *Init,
1737 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1738 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1739 IsWritten(false), SourceOrderOrNumArrayIndices(0)
1743 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1744 TypeSourceInfo *TInfo,
1745 SourceLocation L, Expr *Init,
1747 : Initializee(TInfo), MemberOrEllipsisLocation(), Init(Init),
1748 LParenLoc(L), RParenLoc(R), IsDelegating(true), IsVirtual(false),
1749 IsWritten(false), SourceOrderOrNumArrayIndices(0)
1753 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1755 SourceLocation MemberLoc,
1756 SourceLocation L, Expr *Init,
1759 unsigned NumIndices)
1760 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1761 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1762 IsWritten(false), SourceOrderOrNumArrayIndices(NumIndices)
1764 std::uninitialized_copy(Indices, Indices + NumIndices,
1765 getTrailingObjects<VarDecl *>());
1768 CXXCtorInitializer *CXXCtorInitializer::Create(ASTContext &Context,
1770 SourceLocation MemberLoc,
1771 SourceLocation L, Expr *Init,
1774 unsigned NumIndices) {
1775 void *Mem = Context.Allocate(totalSizeToAlloc<VarDecl *>(NumIndices),
1776 llvm::alignOf<CXXCtorInitializer>());
1777 return new (Mem) CXXCtorInitializer(Context, Member, MemberLoc, L, Init, R,
1778 Indices, NumIndices);
1781 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
1782 if (isBaseInitializer())
1783 return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
1788 const Type *CXXCtorInitializer::getBaseClass() const {
1789 if (isBaseInitializer())
1790 return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
1795 SourceLocation CXXCtorInitializer::getSourceLocation() const {
1796 if (isInClassMemberInitializer())
1797 return getAnyMember()->getLocation();
1799 if (isAnyMemberInitializer())
1800 return getMemberLocation();
1802 if (TypeSourceInfo *TSInfo = Initializee.get<TypeSourceInfo*>())
1803 return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
1805 return SourceLocation();
1808 SourceRange CXXCtorInitializer::getSourceRange() const {
1809 if (isInClassMemberInitializer()) {
1810 FieldDecl *D = getAnyMember();
1811 if (Expr *I = D->getInClassInitializer())
1812 return I->getSourceRange();
1813 return SourceRange();
1816 return SourceRange(getSourceLocation(), getRParenLoc());
1819 void CXXConstructorDecl::anchor() { }
1821 CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
1824 unsigned Extra = additionalSizeToAlloc<InheritedConstructor>(Inherited);
1825 auto *Result = new (C, ID, Extra) CXXConstructorDecl(
1826 C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
1827 false, false, false, false, InheritedConstructor());
1828 Result->IsInheritingConstructor = Inherited;
1832 CXXConstructorDecl *
1833 CXXConstructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1834 SourceLocation StartLoc,
1835 const DeclarationNameInfo &NameInfo,
1836 QualType T, TypeSourceInfo *TInfo,
1837 bool isExplicit, bool isInline,
1838 bool isImplicitlyDeclared, bool isConstexpr,
1839 InheritedConstructor Inherited) {
1840 assert(NameInfo.getName().getNameKind()
1841 == DeclarationName::CXXConstructorName &&
1842 "Name must refer to a constructor");
1844 additionalSizeToAlloc<InheritedConstructor>(Inherited ? 1 : 0);
1845 return new (C, RD, Extra) CXXConstructorDecl(
1846 C, RD, StartLoc, NameInfo, T, TInfo, isExplicit, isInline,
1847 isImplicitlyDeclared, isConstexpr, Inherited);
1850 CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
1851 return CtorInitializers.get(getASTContext().getExternalSource());
1854 CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
1855 assert(isDelegatingConstructor() && "Not a delegating constructor!");
1856 Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
1857 if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(E))
1858 return Construct->getConstructor();
1863 bool CXXConstructorDecl::isDefaultConstructor() const {
1864 // C++ [class.ctor]p5:
1865 // A default constructor for a class X is a constructor of class
1866 // X that can be called without an argument.
1867 return (getNumParams() == 0) ||
1868 (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
1872 CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
1873 return isCopyOrMoveConstructor(TypeQuals) &&
1874 getParamDecl(0)->getType()->isLValueReferenceType();
1877 bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
1878 return isCopyOrMoveConstructor(TypeQuals) &&
1879 getParamDecl(0)->getType()->isRValueReferenceType();
1882 /// \brief Determine whether this is a copy or move constructor.
1883 bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
1884 // C++ [class.copy]p2:
1885 // A non-template constructor for class X is a copy constructor
1886 // if its first parameter is of type X&, const X&, volatile X& or
1887 // const volatile X&, and either there are no other parameters
1888 // or else all other parameters have default arguments (8.3.6).
1889 // C++0x [class.copy]p3:
1890 // A non-template constructor for class X is a move constructor if its
1891 // first parameter is of type X&&, const X&&, volatile X&&, or
1892 // const volatile X&&, and either there are no other parameters or else
1893 // all other parameters have default arguments.
1894 if ((getNumParams() < 1) ||
1895 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
1896 (getPrimaryTemplate() != nullptr) ||
1897 (getDescribedFunctionTemplate() != nullptr))
1900 const ParmVarDecl *Param = getParamDecl(0);
1902 // Do we have a reference type?
1903 const ReferenceType *ParamRefType = Param->getType()->getAs<ReferenceType>();
1907 // Is it a reference to our class type?
1908 ASTContext &Context = getASTContext();
1910 CanQualType PointeeType
1911 = Context.getCanonicalType(ParamRefType->getPointeeType());
1913 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
1914 if (PointeeType.getUnqualifiedType() != ClassTy)
1917 // FIXME: other qualifiers?
1919 // We have a copy or move constructor.
1920 TypeQuals = PointeeType.getCVRQualifiers();
1924 bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
1925 // C++ [class.conv.ctor]p1:
1926 // A constructor declared without the function-specifier explicit
1927 // that can be called with a single parameter specifies a
1928 // conversion from the type of its first parameter to the type of
1929 // its class. Such a constructor is called a converting
1931 if (isExplicit() && !AllowExplicit)
1934 return (getNumParams() == 0 &&
1935 getType()->getAs<FunctionProtoType>()->isVariadic()) ||
1936 (getNumParams() == 1) ||
1937 (getNumParams() > 1 &&
1938 (getParamDecl(1)->hasDefaultArg() ||
1939 getParamDecl(1)->isParameterPack()));
1942 bool CXXConstructorDecl::isSpecializationCopyingObject() const {
1943 if ((getNumParams() < 1) ||
1944 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
1945 (getDescribedFunctionTemplate() != nullptr))
1948 const ParmVarDecl *Param = getParamDecl(0);
1950 ASTContext &Context = getASTContext();
1951 CanQualType ParamType = Context.getCanonicalType(Param->getType());
1953 // Is it the same as our our class type?
1955 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
1956 if (ParamType.getUnqualifiedType() != ClassTy)
1962 void CXXDestructorDecl::anchor() { }
1965 CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1967 CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
1968 QualType(), nullptr, false, false);
1972 CXXDestructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1973 SourceLocation StartLoc,
1974 const DeclarationNameInfo &NameInfo,
1975 QualType T, TypeSourceInfo *TInfo,
1976 bool isInline, bool isImplicitlyDeclared) {
1977 assert(NameInfo.getName().getNameKind()
1978 == DeclarationName::CXXDestructorName &&
1979 "Name must refer to a destructor");
1980 return new (C, RD) CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo,
1981 isInline, isImplicitlyDeclared);
1984 void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD) {
1985 auto *First = cast<CXXDestructorDecl>(getFirstDecl());
1986 if (OD && !First->OperatorDelete) {
1987 First->OperatorDelete = OD;
1988 if (auto *L = getASTMutationListener())
1989 L->ResolvedOperatorDelete(First, OD);
1993 void CXXConversionDecl::anchor() { }
1996 CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1997 return new (C, ID) CXXConversionDecl(C, nullptr, SourceLocation(),
1998 DeclarationNameInfo(), QualType(),
1999 nullptr, false, false, false,
2004 CXXConversionDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2005 SourceLocation StartLoc,
2006 const DeclarationNameInfo &NameInfo,
2007 QualType T, TypeSourceInfo *TInfo,
2008 bool isInline, bool isExplicit,
2009 bool isConstexpr, SourceLocation EndLocation) {
2010 assert(NameInfo.getName().getNameKind()
2011 == DeclarationName::CXXConversionFunctionName &&
2012 "Name must refer to a conversion function");
2013 return new (C, RD) CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo,
2014 isInline, isExplicit, isConstexpr,
2018 bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
2019 return isImplicit() && getParent()->isLambda() &&
2020 getConversionType()->isBlockPointerType();
2023 void LinkageSpecDecl::anchor() { }
2025 LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
2027 SourceLocation ExternLoc,
2028 SourceLocation LangLoc,
2031 return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2034 LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
2036 return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
2037 SourceLocation(), lang_c, false);
2040 void UsingDirectiveDecl::anchor() { }
2042 UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
2044 SourceLocation NamespaceLoc,
2045 NestedNameSpecifierLoc QualifierLoc,
2046 SourceLocation IdentLoc,
2048 DeclContext *CommonAncestor) {
2049 if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Used))
2050 Used = NS->getOriginalNamespace();
2051 return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
2052 IdentLoc, Used, CommonAncestor);
2055 UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
2057 return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
2059 NestedNameSpecifierLoc(),
2060 SourceLocation(), nullptr, nullptr);
2063 NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
2064 if (NamespaceAliasDecl *NA =
2065 dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
2066 return NA->getNamespace();
2067 return cast_or_null<NamespaceDecl>(NominatedNamespace);
2070 NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
2071 SourceLocation StartLoc, SourceLocation IdLoc,
2072 IdentifierInfo *Id, NamespaceDecl *PrevDecl)
2073 : NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
2074 redeclarable_base(C), LocStart(StartLoc), RBraceLoc(),
2075 AnonOrFirstNamespaceAndInline(nullptr, Inline) {
2076 setPreviousDecl(PrevDecl);
2079 AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
2082 NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
2083 bool Inline, SourceLocation StartLoc,
2084 SourceLocation IdLoc, IdentifierInfo *Id,
2085 NamespaceDecl *PrevDecl) {
2086 return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
2090 NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2091 return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
2092 SourceLocation(), nullptr, nullptr);
2095 NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
2099 return AnonOrFirstNamespaceAndInline.getPointer();
2102 const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
2106 return AnonOrFirstNamespaceAndInline.getPointer();
2109 bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
2111 NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
2112 return getNextRedeclaration();
2114 NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
2115 return getPreviousDecl();
2117 NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
2118 return getMostRecentDecl();
2121 void NamespaceAliasDecl::anchor() { }
2123 NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
2124 return getNextRedeclaration();
2126 NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
2127 return getPreviousDecl();
2129 NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
2130 return getMostRecentDecl();
2133 NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
2134 SourceLocation UsingLoc,
2135 SourceLocation AliasLoc,
2136 IdentifierInfo *Alias,
2137 NestedNameSpecifierLoc QualifierLoc,
2138 SourceLocation IdentLoc,
2139 NamedDecl *Namespace) {
2140 // FIXME: Preserve the aliased namespace as written.
2141 if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
2142 Namespace = NS->getOriginalNamespace();
2143 return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
2144 QualifierLoc, IdentLoc, Namespace);
2147 NamespaceAliasDecl *
2148 NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2149 return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
2150 SourceLocation(), nullptr,
2151 NestedNameSpecifierLoc(),
2152 SourceLocation(), nullptr);
2155 void UsingShadowDecl::anchor() { }
2157 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
2158 SourceLocation Loc, UsingDecl *Using,
2160 : NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
2161 redeclarable_base(C), Underlying(Target),
2162 UsingOrNextShadow(cast<NamedDecl>(Using)) {
2164 IdentifierNamespace = Target->getIdentifierNamespace();
2168 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
2169 : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
2170 redeclarable_base(C), Underlying(), UsingOrNextShadow() {}
2173 UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2174 return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2177 UsingDecl *UsingShadowDecl::getUsingDecl() const {
2178 const UsingShadowDecl *Shadow = this;
2179 while (const UsingShadowDecl *NextShadow =
2180 dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
2181 Shadow = NextShadow;
2182 return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2185 void ConstructorUsingShadowDecl::anchor() { }
2187 ConstructorUsingShadowDecl *
2188 ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
2189 SourceLocation Loc, UsingDecl *Using,
2190 NamedDecl *Target, bool IsVirtual) {
2191 return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
2195 ConstructorUsingShadowDecl *
2196 ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2197 return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2200 CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
2201 return getUsingDecl()->getQualifier()->getAsRecordDecl();
2204 void UsingDecl::anchor() { }
2206 void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
2207 assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
2208 "declaration already in set");
2209 assert(S->getUsingDecl() == this);
2211 if (FirstUsingShadow.getPointer())
2212 S->UsingOrNextShadow = FirstUsingShadow.getPointer();
2213 FirstUsingShadow.setPointer(S);
2216 void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
2217 assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
2218 "declaration not in set");
2219 assert(S->getUsingDecl() == this);
2221 // Remove S from the shadow decl chain. This is O(n) but hopefully rare.
2223 if (FirstUsingShadow.getPointer() == S) {
2224 FirstUsingShadow.setPointer(
2225 dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
2226 S->UsingOrNextShadow = this;
2230 UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
2231 while (Prev->UsingOrNextShadow != S)
2232 Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
2233 Prev->UsingOrNextShadow = S->UsingOrNextShadow;
2234 S->UsingOrNextShadow = this;
2237 UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
2238 NestedNameSpecifierLoc QualifierLoc,
2239 const DeclarationNameInfo &NameInfo,
2241 return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
2244 UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2245 return new (C, ID) UsingDecl(nullptr, SourceLocation(),
2246 NestedNameSpecifierLoc(), DeclarationNameInfo(),
2250 SourceRange UsingDecl::getSourceRange() const {
2251 SourceLocation Begin = isAccessDeclaration()
2252 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2253 return SourceRange(Begin, getNameInfo().getEndLoc());
2256 void UnresolvedUsingValueDecl::anchor() { }
2258 UnresolvedUsingValueDecl *
2259 UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
2260 SourceLocation UsingLoc,
2261 NestedNameSpecifierLoc QualifierLoc,
2262 const DeclarationNameInfo &NameInfo) {
2263 return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
2264 QualifierLoc, NameInfo);
2267 UnresolvedUsingValueDecl *
2268 UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2269 return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
2271 NestedNameSpecifierLoc(),
2272 DeclarationNameInfo());
2275 SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
2276 SourceLocation Begin = isAccessDeclaration()
2277 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2278 return SourceRange(Begin, getNameInfo().getEndLoc());
2281 void UnresolvedUsingTypenameDecl::anchor() { }
2283 UnresolvedUsingTypenameDecl *
2284 UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
2285 SourceLocation UsingLoc,
2286 SourceLocation TypenameLoc,
2287 NestedNameSpecifierLoc QualifierLoc,
2288 SourceLocation TargetNameLoc,
2289 DeclarationName TargetName) {
2290 return new (C, DC) UnresolvedUsingTypenameDecl(
2291 DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
2292 TargetName.getAsIdentifierInfo());
2295 UnresolvedUsingTypenameDecl *
2296 UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2297 return new (C, ID) UnresolvedUsingTypenameDecl(
2298 nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
2299 SourceLocation(), nullptr);
2302 void StaticAssertDecl::anchor() { }
2304 StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
2305 SourceLocation StaticAssertLoc,
2307 StringLiteral *Message,
2308 SourceLocation RParenLoc,
2310 return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
2314 StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
2316 return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
2317 nullptr, SourceLocation(), false);
2320 MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
2321 SourceLocation L, DeclarationName N,
2322 QualType T, TypeSourceInfo *TInfo,
2323 SourceLocation StartL,
2324 IdentifierInfo *Getter,
2325 IdentifierInfo *Setter) {
2326 return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
2329 MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
2331 return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
2332 DeclarationName(), QualType(), nullptr,
2333 SourceLocation(), nullptr, nullptr);
2336 static const char *getAccessName(AccessSpecifier AS) {
2339 llvm_unreachable("Invalid access specifier!");
2347 llvm_unreachable("Invalid access specifier!");
2350 const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
2351 AccessSpecifier AS) {
2352 return DB << getAccessName(AS);
2355 const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
2356 AccessSpecifier AS) {
2357 return DB << getAccessName(AS);