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;
537 // C++11 [dcl.init.aggr]p1: DR1518
538 // An aggregate is an array or a class with no user-provided, explicit, or
539 // inherited constructors
540 if (Constructor->isUserProvided() || Constructor->isExplicit())
541 data().Aggregate = false;
544 // Handle constructors, including those inherited from base classes.
545 if (CXXConstructorDecl *Constructor =
546 dyn_cast<CXXConstructorDecl>(DUnderlying)) {
547 // Record if we see any constexpr constructors which are neither copy
548 // nor move constructors.
549 // C++1z [basic.types]p10:
550 // [...] has at least one constexpr constructor or constructor template
551 // (possibly inherited from a base class) that is not a copy or move
553 if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
554 data().HasConstexprNonCopyMoveConstructor = true;
557 // Handle destructors.
558 if (CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) {
559 SMKind |= SMF_Destructor;
561 if (DD->isUserProvided())
562 data().HasIrrelevantDestructor = false;
563 // If the destructor is explicitly defaulted and not trivial or not public
564 // or if the destructor is deleted, we clear HasIrrelevantDestructor in
565 // finishedDefaultedOrDeletedMember.
567 // C++11 [class.dtor]p5:
568 // A destructor is trivial if [...] the destructor is not virtual.
570 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
573 // Handle member functions.
574 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
575 if (Method->isCopyAssignmentOperator()) {
576 SMKind |= SMF_CopyAssignment;
578 const ReferenceType *ParamTy =
579 Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
580 if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
581 data().HasDeclaredCopyAssignmentWithConstParam = true;
584 if (Method->isMoveAssignmentOperator())
585 SMKind |= SMF_MoveAssignment;
587 // Keep the list of conversion functions up-to-date.
588 if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
589 // FIXME: We use the 'unsafe' accessor for the access specifier here,
590 // because Sema may not have set it yet. That's really just a misdesign
591 // in Sema. However, LLDB *will* have set the access specifier correctly,
592 // and adds declarations after the class is technically completed,
593 // so completeDefinition()'s overriding of the access specifiers doesn't
595 AccessSpecifier AS = Conversion->getAccessUnsafe();
597 if (Conversion->getPrimaryTemplate()) {
598 // We don't record specializations.
600 ASTContext &Ctx = getASTContext();
601 ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
603 FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
604 if (Primary->getPreviousDecl())
605 Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
608 Conversions.addDecl(Ctx, Primary, AS);
613 // If this is the first declaration of a special member, we no longer have
614 // an implicit trivial special member.
615 data().HasTrivialSpecialMembers &=
616 data().DeclaredSpecialMembers | ~SMKind;
618 if (!Method->isImplicit() && !Method->isUserProvided()) {
619 // This method is user-declared but not user-provided. We can't work out
620 // whether it's trivial yet (not until we get to the end of the class).
621 // We'll handle this method in finishedDefaultedOrDeletedMember.
622 } else if (Method->isTrivial())
623 data().HasTrivialSpecialMembers |= SMKind;
625 data().DeclaredNonTrivialSpecialMembers |= SMKind;
627 // Note when we have declared a declared special member, and suppress the
628 // implicit declaration of this special member.
629 data().DeclaredSpecialMembers |= SMKind;
631 if (!Method->isImplicit()) {
632 data().UserDeclaredSpecialMembers |= SMKind;
635 // A POD-struct is an aggregate class that has [...] no user-defined
636 // copy assignment operator and no user-defined destructor.
638 // Since the POD bit is meant to be C++03 POD-ness, and in C++03,
639 // aggregates could not have any constructors, clear it even for an
640 // explicitly defaulted or deleted constructor.
641 // type is technically an aggregate in C++0x since it wouldn't be in 03.
643 // Also, a user-declared move assignment operator makes a class non-POD.
644 // This is an extension in C++03.
645 data().PlainOldData = false;
652 // Handle non-static data members.
653 if (FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
654 // C++ [class.bit]p2:
655 // A declaration for a bit-field that omits the identifier declares an
656 // unnamed bit-field. Unnamed bit-fields are not members and cannot be
658 if (Field->isUnnamedBitfield())
661 // C++ [dcl.init.aggr]p1:
662 // An aggregate is an array or a class (clause 9) with [...] no
663 // private or protected non-static data members (clause 11).
665 // A POD must be an aggregate.
666 if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
667 data().Aggregate = false;
668 data().PlainOldData = false;
672 // A standard-layout class is a class that:
674 // -- has the same access control for all non-static data members,
675 switch (D->getAccess()) {
676 case AS_private: data().HasPrivateFields = true; break;
677 case AS_protected: data().HasProtectedFields = true; break;
678 case AS_public: data().HasPublicFields = true; break;
679 case AS_none: llvm_unreachable("Invalid access specifier");
681 if ((data().HasPrivateFields + data().HasProtectedFields +
682 data().HasPublicFields) > 1)
683 data().IsStandardLayout = false;
685 // Keep track of the presence of mutable fields.
686 if (Field->isMutable())
687 data().HasMutableFields = true;
689 // C++11 [class.union]p8, DR1460:
690 // If X is a union, a non-static data member of X that is not an anonymous
691 // union is a variant member of X.
692 if (isUnion() && !Field->isAnonymousStructOrUnion())
693 data().HasVariantMembers = true;
696 // A POD struct is a class that is both a trivial class and a
697 // standard-layout class, and has no non-static data members of type
698 // non-POD struct, non-POD union (or array of such types).
700 // Automatic Reference Counting: the presence of a member of Objective-C pointer type
701 // that does not explicitly have no lifetime makes the class a non-POD.
702 ASTContext &Context = getASTContext();
703 QualType T = Context.getBaseElementType(Field->getType());
704 if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
705 if (!Context.getLangOpts().ObjCAutoRefCount) {
706 setHasObjectMember(true);
707 } else if (T.getObjCLifetime() != Qualifiers::OCL_ExplicitNone) {
708 // Objective-C Automatic Reference Counting:
709 // If a class has a non-static data member of Objective-C pointer
710 // type (or array thereof), it is a non-POD type and its
711 // default constructor (if any), copy constructor, move constructor,
712 // copy assignment operator, move assignment operator, and destructor are
714 setHasObjectMember(true);
715 struct DefinitionData &Data = data();
716 Data.PlainOldData = false;
717 Data.HasTrivialSpecialMembers = 0;
718 Data.HasIrrelevantDestructor = false;
720 } else if (!T.isCXX98PODType(Context))
721 data().PlainOldData = false;
723 if (T->isReferenceType()) {
724 if (!Field->hasInClassInitializer())
725 data().HasUninitializedReferenceMember = true;
728 // A standard-layout class is a class that:
729 // -- has no non-static data members of type [...] reference,
730 data().IsStandardLayout = false;
733 if (!Field->hasInClassInitializer() && !Field->isMutable()) {
734 if (CXXRecordDecl *FieldType = T->getAsCXXRecordDecl()) {
735 if (FieldType->hasDefinition() && !FieldType->allowConstDefaultInit())
736 data().HasUninitializedFields = true;
738 data().HasUninitializedFields = true;
742 // Record if this field is the first non-literal or volatile field or base.
743 if (!T->isLiteralType(Context) || T.isVolatileQualified())
744 data().HasNonLiteralTypeFieldsOrBases = true;
746 if (Field->hasInClassInitializer() ||
747 (Field->isAnonymousStructOrUnion() &&
748 Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
749 data().HasInClassInitializer = true;
752 // A default constructor is trivial if [...] no non-static data member
753 // of its class has a brace-or-equal-initializer.
754 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
756 // C++11 [dcl.init.aggr]p1:
757 // An aggregate is a [...] class with [...] no
758 // brace-or-equal-initializers for non-static data members.
760 // This rule was removed in C++14.
761 if (!getASTContext().getLangOpts().CPlusPlus14)
762 data().Aggregate = false;
765 // A POD struct is [...] a trivial class.
766 data().PlainOldData = false;
769 // C++11 [class.copy]p23:
770 // A defaulted copy/move assignment operator for a class X is defined
771 // as deleted if X has:
772 // -- a non-static data member of reference type
773 if (T->isReferenceType())
774 data().DefaultedMoveAssignmentIsDeleted = true;
776 if (const RecordType *RecordTy = T->getAs<RecordType>()) {
777 CXXRecordDecl* FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
778 if (FieldRec->getDefinition()) {
779 addedClassSubobject(FieldRec);
781 // We may need to perform overload resolution to determine whether a
782 // field can be moved if it's const or volatile qualified.
783 if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
784 data().NeedOverloadResolutionForMoveConstructor = true;
785 data().NeedOverloadResolutionForMoveAssignment = true;
788 // C++11 [class.ctor]p5, C++11 [class.copy]p11:
789 // A defaulted [special member] for a class X is defined as
791 // -- X is a union-like class that has a variant member with a
792 // non-trivial [corresponding special member]
794 if (FieldRec->hasNonTrivialMoveConstructor())
795 data().DefaultedMoveConstructorIsDeleted = true;
796 if (FieldRec->hasNonTrivialMoveAssignment())
797 data().DefaultedMoveAssignmentIsDeleted = true;
798 if (FieldRec->hasNonTrivialDestructor())
799 data().DefaultedDestructorIsDeleted = true;
802 // For an anonymous union member, our overload resolution will perform
803 // overload resolution for its members.
804 if (Field->isAnonymousStructOrUnion()) {
805 data().NeedOverloadResolutionForMoveConstructor |=
806 FieldRec->data().NeedOverloadResolutionForMoveConstructor;
807 data().NeedOverloadResolutionForMoveAssignment |=
808 FieldRec->data().NeedOverloadResolutionForMoveAssignment;
809 data().NeedOverloadResolutionForDestructor |=
810 FieldRec->data().NeedOverloadResolutionForDestructor;
813 // C++0x [class.ctor]p5:
814 // A default constructor is trivial [...] if:
815 // -- for all the non-static data members of its class that are of
816 // class type (or array thereof), each such class has a trivial
817 // default constructor.
818 if (!FieldRec->hasTrivialDefaultConstructor())
819 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
821 // C++0x [class.copy]p13:
822 // A copy/move constructor for class X is trivial if [...]
824 // -- for each non-static data member of X that is of class type (or
825 // an array thereof), the constructor selected to copy/move that
826 // member is trivial;
827 if (!FieldRec->hasTrivialCopyConstructor())
828 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
829 // If the field doesn't have a simple move constructor, we'll eagerly
830 // declare the move constructor for this class and we'll decide whether
831 // it's trivial then.
832 if (!FieldRec->hasTrivialMoveConstructor())
833 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
835 // C++0x [class.copy]p27:
836 // A copy/move assignment operator for class X is trivial if [...]
838 // -- for each non-static data member of X that is of class type (or
839 // an array thereof), the assignment operator selected to
840 // copy/move that member is trivial;
841 if (!FieldRec->hasTrivialCopyAssignment())
842 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
843 // If the field doesn't have a simple move assignment, we'll eagerly
844 // declare the move assignment for this class and we'll decide whether
845 // it's trivial then.
846 if (!FieldRec->hasTrivialMoveAssignment())
847 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
849 if (!FieldRec->hasTrivialDestructor())
850 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
851 if (!FieldRec->hasIrrelevantDestructor())
852 data().HasIrrelevantDestructor = false;
853 if (FieldRec->hasObjectMember())
854 setHasObjectMember(true);
855 if (FieldRec->hasVolatileMember())
856 setHasVolatileMember(true);
859 // A standard-layout class is a class that:
860 // -- has no non-static data members of type non-standard-layout
861 // class (or array of such types) [...]
862 if (!FieldRec->isStandardLayout())
863 data().IsStandardLayout = false;
866 // A standard-layout class is a class that:
868 // -- has no base classes of the same type as the first non-static
870 // We don't want to expend bits in the state of the record decl
871 // tracking whether this is the first non-static data member so we
872 // cheat a bit and use some of the existing state: the empty bit.
873 // Virtual bases and virtual methods make a class non-empty, but they
874 // also make it non-standard-layout so we needn't check here.
875 // A non-empty base class may leave the class standard-layout, but not
876 // if we have arrived here, and have at least one non-static data
877 // member. If IsStandardLayout remains true, then the first non-static
878 // data member must come through here with Empty still true, and Empty
879 // will subsequently be set to false below.
880 if (data().IsStandardLayout && data().Empty) {
881 for (const auto &BI : bases()) {
882 if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
883 data().IsStandardLayout = false;
889 // Keep track of the presence of mutable fields.
890 if (FieldRec->hasMutableFields())
891 data().HasMutableFields = true;
893 // C++11 [class.copy]p13:
894 // If the implicitly-defined constructor would satisfy the
895 // requirements of a constexpr constructor, the implicitly-defined
896 // constructor is constexpr.
897 // C++11 [dcl.constexpr]p4:
898 // -- every constructor involved in initializing non-static data
899 // members [...] shall be a constexpr constructor
900 if (!Field->hasInClassInitializer() &&
901 !FieldRec->hasConstexprDefaultConstructor() && !isUnion())
902 // The standard requires any in-class initializer to be a constant
903 // expression. We consider this to be a defect.
904 data().DefaultedDefaultConstructorIsConstexpr = false;
906 // C++11 [class.copy]p8:
907 // The implicitly-declared copy constructor for a class X will have
908 // the form 'X::X(const X&)' if [...] for all the non-static data
909 // members of X that are of a class type M (or array thereof), each
910 // such class type has a copy constructor whose first parameter is
911 // of type 'const M&' or 'const volatile M&'.
912 if (!FieldRec->hasCopyConstructorWithConstParam())
913 data().ImplicitCopyConstructorHasConstParam = false;
915 // C++11 [class.copy]p18:
916 // The implicitly-declared copy assignment oeprator for a class X will
917 // have the form 'X& X::operator=(const X&)' if [...] for all the
918 // non-static data members of X that are of a class type M (or array
919 // thereof), each such class type has a copy assignment operator whose
920 // parameter is of type 'const M&', 'const volatile M&' or 'M'.
921 if (!FieldRec->hasCopyAssignmentWithConstParam())
922 data().ImplicitCopyAssignmentHasConstParam = false;
924 if (FieldRec->hasUninitializedReferenceMember() &&
925 !Field->hasInClassInitializer())
926 data().HasUninitializedReferenceMember = true;
928 // C++11 [class.union]p8, DR1460:
929 // a non-static data member of an anonymous union that is a member of
930 // X is also a variant member of X.
931 if (FieldRec->hasVariantMembers() &&
932 Field->isAnonymousStructOrUnion())
933 data().HasVariantMembers = true;
936 // Base element type of field is a non-class type.
937 if (!T->isLiteralType(Context) ||
938 (!Field->hasInClassInitializer() && !isUnion()))
939 data().DefaultedDefaultConstructorIsConstexpr = false;
941 // C++11 [class.copy]p23:
942 // A defaulted copy/move assignment operator for a class X is defined
943 // as deleted if X has:
944 // -- a non-static data member of const non-class type (or array
946 if (T.isConstQualified())
947 data().DefaultedMoveAssignmentIsDeleted = true;
951 // A standard-layout class is a class that:
953 // -- either has no non-static data members in the most derived
954 // class and at most one base class with non-static data members,
955 // or has no base classes with non-static data members, and
956 // At this point we know that we have a non-static data member, so the last
958 if (!data().HasNoNonEmptyBases)
959 data().IsStandardLayout = false;
961 // C++14 [meta.unary.prop]p4:
962 // T is a class type [...] with [...] no non-static data members other
963 // than bit-fields of length 0...
965 if (!Field->isBitField() ||
966 (!Field->getBitWidth()->isTypeDependent() &&
967 !Field->getBitWidth()->isValueDependent() &&
968 Field->getBitWidthValue(Context) != 0))
969 data().Empty = false;
973 // Handle using declarations of conversion functions.
974 if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(D)) {
975 if (Shadow->getDeclName().getNameKind()
976 == DeclarationName::CXXConversionFunctionName) {
977 ASTContext &Ctx = getASTContext();
978 data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
982 if (UsingDecl *Using = dyn_cast<UsingDecl>(D)) {
983 if (Using->getDeclName().getNameKind() ==
984 DeclarationName::CXXConstructorName) {
985 data().HasInheritedConstructor = true;
986 // C++1z [dcl.init.aggr]p1:
987 // An aggregate is [...] a class [...] with no inherited constructors
988 data().Aggregate = false;
991 if (Using->getDeclName().getCXXOverloadedOperator() == OO_Equal)
992 data().HasInheritedAssignment = true;
996 void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
997 assert(!D->isImplicit() && !D->isUserProvided());
999 // The kind of special member this declaration is, if any.
1000 unsigned SMKind = 0;
1002 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1003 if (Constructor->isDefaultConstructor()) {
1004 SMKind |= SMF_DefaultConstructor;
1005 if (Constructor->isConstexpr())
1006 data().HasConstexprDefaultConstructor = true;
1008 if (Constructor->isCopyConstructor())
1009 SMKind |= SMF_CopyConstructor;
1010 else if (Constructor->isMoveConstructor())
1011 SMKind |= SMF_MoveConstructor;
1012 else if (Constructor->isConstexpr())
1013 // We may now know that the constructor is constexpr.
1014 data().HasConstexprNonCopyMoveConstructor = true;
1015 } else if (isa<CXXDestructorDecl>(D)) {
1016 SMKind |= SMF_Destructor;
1017 if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
1018 data().HasIrrelevantDestructor = false;
1019 } else if (D->isCopyAssignmentOperator())
1020 SMKind |= SMF_CopyAssignment;
1021 else if (D->isMoveAssignmentOperator())
1022 SMKind |= SMF_MoveAssignment;
1024 // Update which trivial / non-trivial special members we have.
1025 // addedMember will have skipped this step for this member.
1027 data().HasTrivialSpecialMembers |= SMKind;
1029 data().DeclaredNonTrivialSpecialMembers |= SMKind;
1032 bool CXXRecordDecl::isCLike() const {
1033 if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
1034 !TemplateOrInstantiation.isNull())
1036 if (!hasDefinition())
1039 return isPOD() && data().HasOnlyCMembers;
1042 bool CXXRecordDecl::isGenericLambda() const {
1043 if (!isLambda()) return false;
1044 return getLambdaData().IsGenericLambda;
1047 CXXMethodDecl* CXXRecordDecl::getLambdaCallOperator() const {
1048 if (!isLambda()) return nullptr;
1049 DeclarationName Name =
1050 getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
1051 DeclContext::lookup_result Calls = lookup(Name);
1053 assert(!Calls.empty() && "Missing lambda call operator!");
1054 assert(Calls.size() == 1 && "More than one lambda call operator!");
1056 NamedDecl *CallOp = Calls.front();
1057 if (FunctionTemplateDecl *CallOpTmpl =
1058 dyn_cast<FunctionTemplateDecl>(CallOp))
1059 return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
1061 return cast<CXXMethodDecl>(CallOp);
1064 CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
1065 if (!isLambda()) return nullptr;
1066 DeclarationName Name =
1067 &getASTContext().Idents.get(getLambdaStaticInvokerName());
1068 DeclContext::lookup_result Invoker = lookup(Name);
1069 if (Invoker.empty()) return nullptr;
1070 assert(Invoker.size() == 1 && "More than one static invoker operator!");
1071 NamedDecl *InvokerFun = Invoker.front();
1072 if (FunctionTemplateDecl *InvokerTemplate =
1073 dyn_cast<FunctionTemplateDecl>(InvokerFun))
1074 return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
1076 return cast<CXXMethodDecl>(InvokerFun);
1079 void CXXRecordDecl::getCaptureFields(
1080 llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1081 FieldDecl *&ThisCapture) const {
1083 ThisCapture = nullptr;
1085 LambdaDefinitionData &Lambda = getLambdaData();
1086 RecordDecl::field_iterator Field = field_begin();
1087 for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
1088 C != CEnd; ++C, ++Field) {
1089 if (C->capturesThis())
1090 ThisCapture = *Field;
1091 else if (C->capturesVariable())
1092 Captures[C->getCapturedVar()] = *Field;
1094 assert(Field == field_end());
1097 TemplateParameterList *
1098 CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
1099 if (!isLambda()) return nullptr;
1100 CXXMethodDecl *CallOp = getLambdaCallOperator();
1101 if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
1102 return Tmpl->getTemplateParameters();
1106 Decl *CXXRecordDecl::getLambdaContextDecl() const {
1107 assert(isLambda() && "Not a lambda closure type!");
1108 ExternalASTSource *Source = getParentASTContext().getExternalSource();
1109 return getLambdaData().ContextDecl.get(Source);
1112 static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
1114 cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
1115 ->getConversionType();
1116 return Context.getCanonicalType(T);
1119 /// Collect the visible conversions of a base class.
1121 /// \param Record a base class of the class we're considering
1122 /// \param InVirtual whether this base class is a virtual base (or a base
1123 /// of a virtual base)
1124 /// \param Access the access along the inheritance path to this base
1125 /// \param ParentHiddenTypes the conversions provided by the inheritors
1127 /// \param Output the set to which to add conversions from non-virtual bases
1128 /// \param VOutput the set to which to add conversions from virtual bases
1129 /// \param HiddenVBaseCs the set of conversions which were hidden in a
1130 /// virtual base along some inheritance path
1131 static void CollectVisibleConversions(ASTContext &Context,
1132 CXXRecordDecl *Record,
1134 AccessSpecifier Access,
1135 const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
1136 ASTUnresolvedSet &Output,
1137 UnresolvedSetImpl &VOutput,
1138 llvm::SmallPtrSet<NamedDecl*, 8> &HiddenVBaseCs) {
1139 // The set of types which have conversions in this class or its
1140 // subclasses. As an optimization, we don't copy the derived set
1141 // unless it might change.
1142 const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
1143 llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
1145 // Collect the direct conversions and figure out which conversions
1146 // will be hidden in the subclasses.
1147 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1148 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1149 if (ConvI != ConvE) {
1150 HiddenTypesBuffer = ParentHiddenTypes;
1151 HiddenTypes = &HiddenTypesBuffer;
1153 for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
1154 CanQualType ConvType(GetConversionType(Context, I.getDecl()));
1155 bool Hidden = ParentHiddenTypes.count(ConvType);
1157 HiddenTypesBuffer.insert(ConvType);
1159 // If this conversion is hidden and we're in a virtual base,
1160 // remember that it's hidden along some inheritance path.
1161 if (Hidden && InVirtual)
1162 HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
1164 // If this conversion isn't hidden, add it to the appropriate output.
1166 AccessSpecifier IAccess
1167 = CXXRecordDecl::MergeAccess(Access, I.getAccess());
1170 VOutput.addDecl(I.getDecl(), IAccess);
1172 Output.addDecl(Context, I.getDecl(), IAccess);
1177 // Collect information recursively from any base classes.
1178 for (const auto &I : Record->bases()) {
1179 const RecordType *RT = I.getType()->getAs<RecordType>();
1182 AccessSpecifier BaseAccess
1183 = CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
1184 bool BaseInVirtual = InVirtual || I.isVirtual();
1186 CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
1187 CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
1188 *HiddenTypes, Output, VOutput, HiddenVBaseCs);
1192 /// Collect the visible conversions of a class.
1194 /// This would be extremely straightforward if it weren't for virtual
1195 /// bases. It might be worth special-casing that, really.
1196 static void CollectVisibleConversions(ASTContext &Context,
1197 CXXRecordDecl *Record,
1198 ASTUnresolvedSet &Output) {
1199 // The collection of all conversions in virtual bases that we've
1200 // found. These will be added to the output as long as they don't
1201 // appear in the hidden-conversions set.
1202 UnresolvedSet<8> VBaseCs;
1204 // The set of conversions in virtual bases that we've determined to
1206 llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
1208 // The set of types hidden by classes derived from this one.
1209 llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
1211 // Go ahead and collect the direct conversions and add them to the
1212 // hidden-types set.
1213 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1214 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1215 Output.append(Context, ConvI, ConvE);
1216 for (; ConvI != ConvE; ++ConvI)
1217 HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
1219 // Recursively collect conversions from base classes.
1220 for (const auto &I : Record->bases()) {
1221 const RecordType *RT = I.getType()->getAs<RecordType>();
1224 CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
1225 I.isVirtual(), I.getAccessSpecifier(),
1226 HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
1229 // Add any unhidden conversions provided by virtual bases.
1230 for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
1232 if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
1233 Output.addDecl(Context, I.getDecl(), I.getAccess());
1237 /// getVisibleConversionFunctions - get all conversion functions visible
1238 /// in current class; including conversion function templates.
1239 llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1240 CXXRecordDecl::getVisibleConversionFunctions() {
1241 ASTContext &Ctx = getASTContext();
1243 ASTUnresolvedSet *Set;
1244 if (bases_begin() == bases_end()) {
1245 // If root class, all conversions are visible.
1246 Set = &data().Conversions.get(Ctx);
1248 Set = &data().VisibleConversions.get(Ctx);
1249 // If visible conversion list is not evaluated, evaluate it.
1250 if (!data().ComputedVisibleConversions) {
1251 CollectVisibleConversions(Ctx, this, *Set);
1252 data().ComputedVisibleConversions = true;
1255 return llvm::make_range(Set->begin(), Set->end());
1258 void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
1259 // This operation is O(N) but extremely rare. Sema only uses it to
1260 // remove UsingShadowDecls in a class that were followed by a direct
1261 // declaration, e.g.:
1263 // using B::operator int;
1266 // This is uncommon by itself and even more uncommon in conjunction
1267 // with sufficiently large numbers of directly-declared conversions
1268 // that asymptotic behavior matters.
1270 ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
1271 for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
1272 if (Convs[I].getDecl() == ConvDecl) {
1274 assert(std::find(Convs.begin(), Convs.end(), ConvDecl) == Convs.end()
1275 && "conversion was found multiple times in unresolved set");
1280 llvm_unreachable("conversion not found in set!");
1283 CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
1284 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1285 return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
1290 MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
1291 return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1295 CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
1296 TemplateSpecializationKind TSK) {
1297 assert(TemplateOrInstantiation.isNull() &&
1298 "Previous template or instantiation?");
1299 assert(!isa<ClassTemplatePartialSpecializationDecl>(this));
1300 TemplateOrInstantiation
1301 = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1304 ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
1305 return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1308 void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
1309 TemplateOrInstantiation = Template;
1312 TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
1313 if (const ClassTemplateSpecializationDecl *Spec
1314 = dyn_cast<ClassTemplateSpecializationDecl>(this))
1315 return Spec->getSpecializationKind();
1317 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1318 return MSInfo->getTemplateSpecializationKind();
1320 return TSK_Undeclared;
1324 CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
1325 if (ClassTemplateSpecializationDecl *Spec
1326 = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1327 Spec->setSpecializationKind(TSK);
1331 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1332 MSInfo->setTemplateSpecializationKind(TSK);
1336 llvm_unreachable("Not a class template or member class specialization");
1339 const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
1340 // If it's a class template specialization, find the template or partial
1341 // specialization from which it was instantiated.
1342 if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1343 auto From = TD->getInstantiatedFrom();
1344 if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
1345 while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
1346 if (NewCTD->isMemberSpecialization())
1350 return CTD->getTemplatedDecl()->getDefinition();
1353 From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
1354 while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
1355 if (NewCTPSD->isMemberSpecialization())
1359 return CTPSD->getDefinition();
1363 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1364 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
1365 const CXXRecordDecl *RD = this;
1366 while (auto *NewRD = RD->getInstantiatedFromMemberClass())
1368 return RD->getDefinition();
1372 assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&
1373 "couldn't find pattern for class template instantiation");
1377 CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
1378 ASTContext &Context = getASTContext();
1379 QualType ClassType = Context.getTypeDeclType(this);
1381 DeclarationName Name
1382 = Context.DeclarationNames.getCXXDestructorName(
1383 Context.getCanonicalType(ClassType));
1385 DeclContext::lookup_result R = lookup(Name);
1389 CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(R.front());
1393 bool CXXRecordDecl::isAnyDestructorNoReturn() const {
1394 // Destructor is noreturn.
1395 if (const CXXDestructorDecl *Destructor = getDestructor())
1396 if (Destructor->isNoReturn())
1399 // Check base classes destructor for noreturn.
1400 for (const auto &Base : bases())
1401 if (Base.getType()->getAsCXXRecordDecl()->isAnyDestructorNoReturn())
1404 // Check fields for noreturn.
1405 for (const auto *Field : fields())
1406 if (const CXXRecordDecl *RD =
1407 Field->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl())
1408 if (RD->isAnyDestructorNoReturn())
1411 // All destructors are not noreturn.
1415 void CXXRecordDecl::completeDefinition() {
1416 completeDefinition(nullptr);
1419 void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
1420 RecordDecl::completeDefinition();
1422 // If the class may be abstract (but hasn't been marked as such), check for
1423 // any pure final overriders.
1424 if (mayBeAbstract()) {
1425 CXXFinalOverriderMap MyFinalOverriders;
1426 if (!FinalOverriders) {
1427 getFinalOverriders(MyFinalOverriders);
1428 FinalOverriders = &MyFinalOverriders;
1432 for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
1433 MEnd = FinalOverriders->end();
1434 M != MEnd && !Done; ++M) {
1435 for (OverridingMethods::iterator SO = M->second.begin(),
1436 SOEnd = M->second.end();
1437 SO != SOEnd && !Done; ++SO) {
1438 assert(SO->second.size() > 0 &&
1439 "All virtual functions have overridding virtual functions");
1441 // C++ [class.abstract]p4:
1442 // A class is abstract if it contains or inherits at least one
1443 // pure virtual function for which the final overrider is pure
1445 if (SO->second.front().Method->isPure()) {
1446 data().Abstract = true;
1454 // Set access bits correctly on the directly-declared conversions.
1455 for (conversion_iterator I = conversion_begin(), E = conversion_end();
1457 I.setAccess((*I)->getAccess());
1460 bool CXXRecordDecl::mayBeAbstract() const {
1461 if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
1462 isDependentContext())
1465 for (const auto &B : bases()) {
1466 CXXRecordDecl *BaseDecl
1467 = cast<CXXRecordDecl>(B.getType()->getAs<RecordType>()->getDecl());
1468 if (BaseDecl->isAbstract())
1475 void CXXMethodDecl::anchor() { }
1477 bool CXXMethodDecl::isStatic() const {
1478 const CXXMethodDecl *MD = getCanonicalDecl();
1480 if (MD->getStorageClass() == SC_Static)
1483 OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
1484 return isStaticOverloadedOperator(OOK);
1487 static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
1488 const CXXMethodDecl *BaseMD) {
1489 for (CXXMethodDecl::method_iterator I = DerivedMD->begin_overridden_methods(),
1490 E = DerivedMD->end_overridden_methods(); I != E; ++I) {
1491 const CXXMethodDecl *MD = *I;
1492 if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
1494 if (recursivelyOverrides(MD, BaseMD))
1501 CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
1503 if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
1506 // Lookup doesn't work for destructors, so handle them separately.
1507 if (isa<CXXDestructorDecl>(this)) {
1508 CXXMethodDecl *MD = RD->getDestructor();
1510 if (recursivelyOverrides(MD, this))
1512 if (MayBeBase && recursivelyOverrides(this, MD))
1518 for (auto *ND : RD->lookup(getDeclName())) {
1519 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND);
1522 if (recursivelyOverrides(MD, this))
1524 if (MayBeBase && recursivelyOverrides(this, MD))
1528 for (const auto &I : RD->bases()) {
1529 const RecordType *RT = I.getType()->getAs<RecordType>();
1532 const CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
1533 CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
1542 CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1543 SourceLocation StartLoc,
1544 const DeclarationNameInfo &NameInfo,
1545 QualType T, TypeSourceInfo *TInfo,
1546 StorageClass SC, bool isInline,
1547 bool isConstexpr, SourceLocation EndLocation) {
1548 return new (C, RD) CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo,
1549 T, TInfo, SC, isInline, isConstexpr,
1553 CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1554 return new (C, ID) CXXMethodDecl(CXXMethod, C, nullptr, SourceLocation(),
1555 DeclarationNameInfo(), QualType(), nullptr,
1556 SC_None, false, false, SourceLocation());
1559 bool CXXMethodDecl::isUsualDeallocationFunction() const {
1560 if (getOverloadedOperator() != OO_Delete &&
1561 getOverloadedOperator() != OO_Array_Delete)
1564 // C++ [basic.stc.dynamic.deallocation]p2:
1565 // A template instance is never a usual deallocation function,
1566 // regardless of its signature.
1567 if (getPrimaryTemplate())
1570 // C++ [basic.stc.dynamic.deallocation]p2:
1571 // If a class T has a member deallocation function named operator delete
1572 // with exactly one parameter, then that function is a usual (non-placement)
1573 // deallocation function. [...]
1574 if (getNumParams() == 1)
1576 unsigned UsualParams = 1;
1578 // C++ <=14 [basic.stc.dynamic.deallocation]p2:
1579 // [...] If class T does not declare such an operator delete but does
1580 // declare a member deallocation function named operator delete with
1581 // exactly two parameters, the second of which has type std::size_t (18.1),
1582 // then this function is a usual deallocation function.
1584 // C++17 says a usual deallocation function is one with the signature
1585 // (void* [, size_t] [, std::align_val_t] [, ...])
1586 // and all such functions are usual deallocation functions. It's not clear
1587 // that allowing varargs functions was intentional.
1588 ASTContext &Context = getASTContext();
1589 if (UsualParams < getNumParams() &&
1590 Context.hasSameUnqualifiedType(getParamDecl(UsualParams)->getType(),
1591 Context.getSizeType()))
1594 if (UsualParams < getNumParams() &&
1595 getParamDecl(UsualParams)->getType()->isAlignValT())
1598 if (UsualParams != getNumParams())
1601 // In C++17 onwards, all potential usual deallocation functions are actual
1602 // usual deallocation functions.
1603 if (Context.getLangOpts().AlignedAllocation)
1606 // This function is a usual deallocation function if there are no
1607 // single-parameter deallocation functions of the same kind.
1608 DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
1609 for (DeclContext::lookup_result::iterator I = R.begin(), E = R.end();
1611 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I))
1612 if (FD->getNumParams() == 1)
1619 bool CXXMethodDecl::isCopyAssignmentOperator() const {
1620 // C++0x [class.copy]p17:
1621 // A user-declared copy assignment operator X::operator= is a non-static
1622 // non-template member function of class X with exactly one parameter of
1623 // type X, X&, const X&, volatile X& or const volatile X&.
1624 if (/*operator=*/getOverloadedOperator() != OO_Equal ||
1625 /*non-static*/ isStatic() ||
1626 /*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
1627 getNumParams() != 1)
1630 QualType ParamType = getParamDecl(0)->getType();
1631 if (const LValueReferenceType *Ref = ParamType->getAs<LValueReferenceType>())
1632 ParamType = Ref->getPointeeType();
1634 ASTContext &Context = getASTContext();
1636 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
1637 return Context.hasSameUnqualifiedType(ClassType, ParamType);
1640 bool CXXMethodDecl::isMoveAssignmentOperator() const {
1641 // C++0x [class.copy]p19:
1642 // A user-declared move assignment operator X::operator= is a non-static
1643 // non-template member function of class X with exactly one parameter of type
1644 // X&&, const X&&, volatile X&&, or const volatile X&&.
1645 if (getOverloadedOperator() != OO_Equal || isStatic() ||
1646 getPrimaryTemplate() || getDescribedFunctionTemplate() ||
1647 getNumParams() != 1)
1650 QualType ParamType = getParamDecl(0)->getType();
1651 if (!isa<RValueReferenceType>(ParamType))
1653 ParamType = ParamType->getPointeeType();
1655 ASTContext &Context = getASTContext();
1657 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
1658 return Context.hasSameUnqualifiedType(ClassType, ParamType);
1661 void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
1662 assert(MD->isCanonicalDecl() && "Method is not canonical!");
1663 assert(!MD->getParent()->isDependentContext() &&
1664 "Can't add an overridden method to a class template!");
1665 assert(MD->isVirtual() && "Method is not virtual!");
1667 getASTContext().addOverriddenMethod(this, MD);
1670 CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
1671 if (isa<CXXConstructorDecl>(this)) return nullptr;
1672 return getASTContext().overridden_methods_begin(this);
1675 CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
1676 if (isa<CXXConstructorDecl>(this)) return nullptr;
1677 return getASTContext().overridden_methods_end(this);
1680 unsigned CXXMethodDecl::size_overridden_methods() const {
1681 if (isa<CXXConstructorDecl>(this)) return 0;
1682 return getASTContext().overridden_methods_size(this);
1685 CXXMethodDecl::overridden_method_range
1686 CXXMethodDecl::overridden_methods() const {
1687 if (isa<CXXConstructorDecl>(this))
1688 return overridden_method_range(nullptr, nullptr);
1689 return getASTContext().overridden_methods(this);
1692 QualType CXXMethodDecl::getThisType(ASTContext &C) const {
1693 // C++ 9.3.2p1: The type of this in a member function of a class X is X*.
1694 // If the member function is declared const, the type of this is const X*,
1695 // if the member function is declared volatile, the type of this is
1696 // volatile X*, and if the member function is declared const volatile,
1697 // the type of this is const volatile X*.
1699 assert(isInstance() && "No 'this' for static methods!");
1701 QualType ClassTy = C.getTypeDeclType(getParent());
1702 ClassTy = C.getQualifiedType(ClassTy,
1703 Qualifiers::fromCVRUMask(getTypeQualifiers()));
1704 return C.getPointerType(ClassTy);
1707 bool CXXMethodDecl::hasInlineBody() const {
1708 // If this function is a template instantiation, look at the template from
1709 // which it was instantiated.
1710 const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
1714 const FunctionDecl *fn;
1715 return CheckFn->hasBody(fn) && !fn->isOutOfLine();
1718 bool CXXMethodDecl::isLambdaStaticInvoker() const {
1719 const CXXRecordDecl *P = getParent();
1720 if (P->isLambda()) {
1721 if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
1722 if (StaticInvoker == this) return true;
1723 if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
1724 return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
1730 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1731 TypeSourceInfo *TInfo, bool IsVirtual,
1732 SourceLocation L, Expr *Init,
1734 SourceLocation EllipsisLoc)
1735 : Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
1736 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
1737 IsWritten(false), SourceOrder(0)
1741 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1743 SourceLocation MemberLoc,
1744 SourceLocation L, Expr *Init,
1746 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1747 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1748 IsWritten(false), SourceOrder(0)
1752 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1753 IndirectFieldDecl *Member,
1754 SourceLocation MemberLoc,
1755 SourceLocation L, Expr *Init,
1757 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
1758 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
1759 IsWritten(false), SourceOrder(0)
1763 CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
1764 TypeSourceInfo *TInfo,
1765 SourceLocation L, Expr *Init,
1767 : Initializee(TInfo), MemberOrEllipsisLocation(), Init(Init),
1768 LParenLoc(L), RParenLoc(R), IsDelegating(true), IsVirtual(false),
1769 IsWritten(false), SourceOrder(0)
1773 TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
1774 if (isBaseInitializer())
1775 return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
1780 const Type *CXXCtorInitializer::getBaseClass() const {
1781 if (isBaseInitializer())
1782 return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
1787 SourceLocation CXXCtorInitializer::getSourceLocation() const {
1788 if (isInClassMemberInitializer())
1789 return getAnyMember()->getLocation();
1791 if (isAnyMemberInitializer())
1792 return getMemberLocation();
1794 if (TypeSourceInfo *TSInfo = Initializee.get<TypeSourceInfo*>())
1795 return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
1797 return SourceLocation();
1800 SourceRange CXXCtorInitializer::getSourceRange() const {
1801 if (isInClassMemberInitializer()) {
1802 FieldDecl *D = getAnyMember();
1803 if (Expr *I = D->getInClassInitializer())
1804 return I->getSourceRange();
1805 return SourceRange();
1808 return SourceRange(getSourceLocation(), getRParenLoc());
1811 void CXXConstructorDecl::anchor() { }
1813 CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
1816 unsigned Extra = additionalSizeToAlloc<InheritedConstructor>(Inherited);
1817 auto *Result = new (C, ID, Extra) CXXConstructorDecl(
1818 C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
1819 false, false, false, false, InheritedConstructor());
1820 Result->IsInheritingConstructor = Inherited;
1824 CXXConstructorDecl *
1825 CXXConstructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1826 SourceLocation StartLoc,
1827 const DeclarationNameInfo &NameInfo,
1828 QualType T, TypeSourceInfo *TInfo,
1829 bool isExplicit, bool isInline,
1830 bool isImplicitlyDeclared, bool isConstexpr,
1831 InheritedConstructor Inherited) {
1832 assert(NameInfo.getName().getNameKind()
1833 == DeclarationName::CXXConstructorName &&
1834 "Name must refer to a constructor");
1836 additionalSizeToAlloc<InheritedConstructor>(Inherited ? 1 : 0);
1837 return new (C, RD, Extra) CXXConstructorDecl(
1838 C, RD, StartLoc, NameInfo, T, TInfo, isExplicit, isInline,
1839 isImplicitlyDeclared, isConstexpr, Inherited);
1842 CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
1843 return CtorInitializers.get(getASTContext().getExternalSource());
1846 CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
1847 assert(isDelegatingConstructor() && "Not a delegating constructor!");
1848 Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
1849 if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(E))
1850 return Construct->getConstructor();
1855 bool CXXConstructorDecl::isDefaultConstructor() const {
1856 // C++ [class.ctor]p5:
1857 // A default constructor for a class X is a constructor of class
1858 // X that can be called without an argument.
1859 return (getNumParams() == 0) ||
1860 (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
1864 CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
1865 return isCopyOrMoveConstructor(TypeQuals) &&
1866 getParamDecl(0)->getType()->isLValueReferenceType();
1869 bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
1870 return isCopyOrMoveConstructor(TypeQuals) &&
1871 getParamDecl(0)->getType()->isRValueReferenceType();
1874 /// \brief Determine whether this is a copy or move constructor.
1875 bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
1876 // C++ [class.copy]p2:
1877 // A non-template constructor for class X is a copy constructor
1878 // if its first parameter is of type X&, const X&, volatile X& or
1879 // const volatile X&, and either there are no other parameters
1880 // or else all other parameters have default arguments (8.3.6).
1881 // C++0x [class.copy]p3:
1882 // A non-template constructor for class X is a move constructor if its
1883 // first parameter is of type X&&, const X&&, volatile X&&, or
1884 // const volatile X&&, and either there are no other parameters or else
1885 // all other parameters have default arguments.
1886 if ((getNumParams() < 1) ||
1887 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
1888 (getPrimaryTemplate() != nullptr) ||
1889 (getDescribedFunctionTemplate() != nullptr))
1892 const ParmVarDecl *Param = getParamDecl(0);
1894 // Do we have a reference type?
1895 const ReferenceType *ParamRefType = Param->getType()->getAs<ReferenceType>();
1899 // Is it a reference to our class type?
1900 ASTContext &Context = getASTContext();
1902 CanQualType PointeeType
1903 = Context.getCanonicalType(ParamRefType->getPointeeType());
1905 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
1906 if (PointeeType.getUnqualifiedType() != ClassTy)
1909 // FIXME: other qualifiers?
1911 // We have a copy or move constructor.
1912 TypeQuals = PointeeType.getCVRQualifiers();
1916 bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
1917 // C++ [class.conv.ctor]p1:
1918 // A constructor declared without the function-specifier explicit
1919 // that can be called with a single parameter specifies a
1920 // conversion from the type of its first parameter to the type of
1921 // its class. Such a constructor is called a converting
1923 if (isExplicit() && !AllowExplicit)
1926 return (getNumParams() == 0 &&
1927 getType()->getAs<FunctionProtoType>()->isVariadic()) ||
1928 (getNumParams() == 1) ||
1929 (getNumParams() > 1 &&
1930 (getParamDecl(1)->hasDefaultArg() ||
1931 getParamDecl(1)->isParameterPack()));
1934 bool CXXConstructorDecl::isSpecializationCopyingObject() const {
1935 if ((getNumParams() < 1) ||
1936 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
1937 (getDescribedFunctionTemplate() != nullptr))
1940 const ParmVarDecl *Param = getParamDecl(0);
1942 ASTContext &Context = getASTContext();
1943 CanQualType ParamType = Context.getCanonicalType(Param->getType());
1945 // Is it the same as our our class type?
1947 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
1948 if (ParamType.getUnqualifiedType() != ClassTy)
1954 void CXXDestructorDecl::anchor() { }
1957 CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1959 CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
1960 QualType(), nullptr, false, false);
1964 CXXDestructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1965 SourceLocation StartLoc,
1966 const DeclarationNameInfo &NameInfo,
1967 QualType T, TypeSourceInfo *TInfo,
1968 bool isInline, bool isImplicitlyDeclared) {
1969 assert(NameInfo.getName().getNameKind()
1970 == DeclarationName::CXXDestructorName &&
1971 "Name must refer to a destructor");
1972 return new (C, RD) CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo,
1973 isInline, isImplicitlyDeclared);
1976 void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD) {
1977 auto *First = cast<CXXDestructorDecl>(getFirstDecl());
1978 if (OD && !First->OperatorDelete) {
1979 First->OperatorDelete = OD;
1980 if (auto *L = getASTMutationListener())
1981 L->ResolvedOperatorDelete(First, OD);
1985 void CXXConversionDecl::anchor() { }
1988 CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1989 return new (C, ID) CXXConversionDecl(C, nullptr, SourceLocation(),
1990 DeclarationNameInfo(), QualType(),
1991 nullptr, false, false, false,
1996 CXXConversionDecl::Create(ASTContext &C, CXXRecordDecl *RD,
1997 SourceLocation StartLoc,
1998 const DeclarationNameInfo &NameInfo,
1999 QualType T, TypeSourceInfo *TInfo,
2000 bool isInline, bool isExplicit,
2001 bool isConstexpr, SourceLocation EndLocation) {
2002 assert(NameInfo.getName().getNameKind()
2003 == DeclarationName::CXXConversionFunctionName &&
2004 "Name must refer to a conversion function");
2005 return new (C, RD) CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo,
2006 isInline, isExplicit, isConstexpr,
2010 bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
2011 return isImplicit() && getParent()->isLambda() &&
2012 getConversionType()->isBlockPointerType();
2015 void LinkageSpecDecl::anchor() { }
2017 LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
2019 SourceLocation ExternLoc,
2020 SourceLocation LangLoc,
2023 return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2026 LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
2028 return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
2029 SourceLocation(), lang_c, false);
2032 void UsingDirectiveDecl::anchor() { }
2034 UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
2036 SourceLocation NamespaceLoc,
2037 NestedNameSpecifierLoc QualifierLoc,
2038 SourceLocation IdentLoc,
2040 DeclContext *CommonAncestor) {
2041 if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Used))
2042 Used = NS->getOriginalNamespace();
2043 return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
2044 IdentLoc, Used, CommonAncestor);
2047 UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
2049 return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
2051 NestedNameSpecifierLoc(),
2052 SourceLocation(), nullptr, nullptr);
2055 NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
2056 if (NamespaceAliasDecl *NA =
2057 dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
2058 return NA->getNamespace();
2059 return cast_or_null<NamespaceDecl>(NominatedNamespace);
2062 NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
2063 SourceLocation StartLoc, SourceLocation IdLoc,
2064 IdentifierInfo *Id, NamespaceDecl *PrevDecl)
2065 : NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
2066 redeclarable_base(C), LocStart(StartLoc), RBraceLoc(),
2067 AnonOrFirstNamespaceAndInline(nullptr, Inline) {
2068 setPreviousDecl(PrevDecl);
2071 AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
2074 NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
2075 bool Inline, SourceLocation StartLoc,
2076 SourceLocation IdLoc, IdentifierInfo *Id,
2077 NamespaceDecl *PrevDecl) {
2078 return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
2082 NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2083 return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
2084 SourceLocation(), nullptr, nullptr);
2087 NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
2091 return AnonOrFirstNamespaceAndInline.getPointer();
2094 const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
2098 return AnonOrFirstNamespaceAndInline.getPointer();
2101 bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
2103 NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
2104 return getNextRedeclaration();
2106 NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
2107 return getPreviousDecl();
2109 NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
2110 return getMostRecentDecl();
2113 void NamespaceAliasDecl::anchor() { }
2115 NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
2116 return getNextRedeclaration();
2118 NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
2119 return getPreviousDecl();
2121 NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
2122 return getMostRecentDecl();
2125 NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
2126 SourceLocation UsingLoc,
2127 SourceLocation AliasLoc,
2128 IdentifierInfo *Alias,
2129 NestedNameSpecifierLoc QualifierLoc,
2130 SourceLocation IdentLoc,
2131 NamedDecl *Namespace) {
2132 // FIXME: Preserve the aliased namespace as written.
2133 if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
2134 Namespace = NS->getOriginalNamespace();
2135 return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
2136 QualifierLoc, IdentLoc, Namespace);
2139 NamespaceAliasDecl *
2140 NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2141 return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
2142 SourceLocation(), nullptr,
2143 NestedNameSpecifierLoc(),
2144 SourceLocation(), nullptr);
2147 void UsingShadowDecl::anchor() { }
2149 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
2150 SourceLocation Loc, UsingDecl *Using,
2152 : NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
2153 redeclarable_base(C), Underlying(Target),
2154 UsingOrNextShadow(cast<NamedDecl>(Using)) {
2156 IdentifierNamespace = Target->getIdentifierNamespace();
2160 UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
2161 : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
2162 redeclarable_base(C), Underlying(), UsingOrNextShadow() {}
2165 UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2166 return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2169 UsingDecl *UsingShadowDecl::getUsingDecl() const {
2170 const UsingShadowDecl *Shadow = this;
2171 while (const UsingShadowDecl *NextShadow =
2172 dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
2173 Shadow = NextShadow;
2174 return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2177 void ConstructorUsingShadowDecl::anchor() { }
2179 ConstructorUsingShadowDecl *
2180 ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
2181 SourceLocation Loc, UsingDecl *Using,
2182 NamedDecl *Target, bool IsVirtual) {
2183 return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
2187 ConstructorUsingShadowDecl *
2188 ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2189 return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2192 CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
2193 return getUsingDecl()->getQualifier()->getAsRecordDecl();
2196 void UsingDecl::anchor() { }
2198 void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
2199 assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
2200 "declaration already in set");
2201 assert(S->getUsingDecl() == this);
2203 if (FirstUsingShadow.getPointer())
2204 S->UsingOrNextShadow = FirstUsingShadow.getPointer();
2205 FirstUsingShadow.setPointer(S);
2208 void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
2209 assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
2210 "declaration not in set");
2211 assert(S->getUsingDecl() == this);
2213 // Remove S from the shadow decl chain. This is O(n) but hopefully rare.
2215 if (FirstUsingShadow.getPointer() == S) {
2216 FirstUsingShadow.setPointer(
2217 dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
2218 S->UsingOrNextShadow = this;
2222 UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
2223 while (Prev->UsingOrNextShadow != S)
2224 Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
2225 Prev->UsingOrNextShadow = S->UsingOrNextShadow;
2226 S->UsingOrNextShadow = this;
2229 UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
2230 NestedNameSpecifierLoc QualifierLoc,
2231 const DeclarationNameInfo &NameInfo,
2233 return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
2236 UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2237 return new (C, ID) UsingDecl(nullptr, SourceLocation(),
2238 NestedNameSpecifierLoc(), DeclarationNameInfo(),
2242 SourceRange UsingDecl::getSourceRange() const {
2243 SourceLocation Begin = isAccessDeclaration()
2244 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2245 return SourceRange(Begin, getNameInfo().getEndLoc());
2248 void UsingPackDecl::anchor() { }
2250 UsingPackDecl *UsingPackDecl::Create(ASTContext &C, DeclContext *DC,
2251 NamedDecl *InstantiatedFrom,
2252 ArrayRef<NamedDecl *> UsingDecls) {
2253 size_t Extra = additionalSizeToAlloc<NamedDecl *>(UsingDecls.size());
2254 return new (C, DC, Extra) UsingPackDecl(DC, InstantiatedFrom, UsingDecls);
2257 UsingPackDecl *UsingPackDecl::CreateDeserialized(ASTContext &C, unsigned ID,
2258 unsigned NumExpansions) {
2259 size_t Extra = additionalSizeToAlloc<NamedDecl *>(NumExpansions);
2260 auto *Result = new (C, ID, Extra) UsingPackDecl(nullptr, nullptr, None);
2261 Result->NumExpansions = NumExpansions;
2262 auto *Trail = Result->getTrailingObjects<NamedDecl *>();
2263 for (unsigned I = 0; I != NumExpansions; ++I)
2264 new (Trail + I) NamedDecl*(nullptr);
2268 void UnresolvedUsingValueDecl::anchor() { }
2270 UnresolvedUsingValueDecl *
2271 UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
2272 SourceLocation UsingLoc,
2273 NestedNameSpecifierLoc QualifierLoc,
2274 const DeclarationNameInfo &NameInfo,
2275 SourceLocation EllipsisLoc) {
2276 return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
2277 QualifierLoc, NameInfo,
2281 UnresolvedUsingValueDecl *
2282 UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2283 return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
2285 NestedNameSpecifierLoc(),
2286 DeclarationNameInfo(),
2290 SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
2291 SourceLocation Begin = isAccessDeclaration()
2292 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2293 return SourceRange(Begin, getNameInfo().getEndLoc());
2296 void UnresolvedUsingTypenameDecl::anchor() { }
2298 UnresolvedUsingTypenameDecl *
2299 UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
2300 SourceLocation UsingLoc,
2301 SourceLocation TypenameLoc,
2302 NestedNameSpecifierLoc QualifierLoc,
2303 SourceLocation TargetNameLoc,
2304 DeclarationName TargetName,
2305 SourceLocation EllipsisLoc) {
2306 return new (C, DC) UnresolvedUsingTypenameDecl(
2307 DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
2308 TargetName.getAsIdentifierInfo(), EllipsisLoc);
2311 UnresolvedUsingTypenameDecl *
2312 UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2313 return new (C, ID) UnresolvedUsingTypenameDecl(
2314 nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
2315 SourceLocation(), nullptr, SourceLocation());
2318 void StaticAssertDecl::anchor() { }
2320 StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
2321 SourceLocation StaticAssertLoc,
2323 StringLiteral *Message,
2324 SourceLocation RParenLoc,
2326 return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
2330 StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
2332 return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
2333 nullptr, SourceLocation(), false);
2336 void BindingDecl::anchor() {}
2338 BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
2339 SourceLocation IdLoc, IdentifierInfo *Id) {
2340 return new (C, DC) BindingDecl(DC, IdLoc, Id);
2343 BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2344 return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
2347 VarDecl *BindingDecl::getHoldingVar() const {
2348 Expr *B = getBinding();
2351 auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
2355 auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
2356 assert(VD->isImplicit() && "holding var for binding decl not implicit");
2360 void DecompositionDecl::anchor() {}
2362 DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
2363 SourceLocation StartLoc,
2364 SourceLocation LSquareLoc,
2365 QualType T, TypeSourceInfo *TInfo,
2367 ArrayRef<BindingDecl *> Bindings) {
2368 size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
2369 return new (C, DC, Extra)
2370 DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
2373 DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
2375 unsigned NumBindings) {
2376 size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
2377 auto *Result = new (C, ID, Extra)
2378 DecompositionDecl(C, nullptr, SourceLocation(), SourceLocation(),
2379 QualType(), nullptr, StorageClass(), None);
2380 // Set up and clean out the bindings array.
2381 Result->NumBindings = NumBindings;
2382 auto *Trail = Result->getTrailingObjects<BindingDecl *>();
2383 for (unsigned I = 0; I != NumBindings; ++I)
2384 new (Trail + I) BindingDecl*(nullptr);
2388 void DecompositionDecl::printName(llvm::raw_ostream &os) const {
2391 for (auto *B : bindings()) {
2400 MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
2401 SourceLocation L, DeclarationName N,
2402 QualType T, TypeSourceInfo *TInfo,
2403 SourceLocation StartL,
2404 IdentifierInfo *Getter,
2405 IdentifierInfo *Setter) {
2406 return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
2409 MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
2411 return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
2412 DeclarationName(), QualType(), nullptr,
2413 SourceLocation(), nullptr, nullptr);
2416 static const char *getAccessName(AccessSpecifier AS) {
2419 llvm_unreachable("Invalid access specifier!");
2427 llvm_unreachable("Invalid access specifier!");
2430 const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
2431 AccessSpecifier AS) {
2432 return DB << getAccessName(AS);
2435 const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
2436 AccessSpecifier AS) {
2437 return DB << getAccessName(AS);