105     mutable llvm::PointerUnion<NotKnownLatest, KnownLatest> Link;  variable
112         : Link(NotKnownLatest(reinterpret_cast<UninitializedLatest>(&Ctx))) {}  in DeclLink()
113     DeclLink(PreviousTag, decl_type *D) : Link(NotKnownLatest(Previous(D))) {}  in DeclLink()
116       return Link.is<KnownLatest>() ||  in isFirst()
119              Link.get<NotKnownLatest>().template is<UninitializedLatest>();  in isFirst()
123       if (Link.is<NotKnownLatest>()) {  in getPrevious()
124         NotKnownLatest NKL = Link.get<NotKnownLatest>();  in getPrevious()
129         Link = KnownLatest(*reinterpret_cast<const ASTContext *>(  in getPrevious()
134       return static_cast<decl_type*>(Link.get<KnownLatest>().get(D));  in getPrevious()
139       Link = Previous(D);  in setPrevious()
144       if (Link.is<NotKnownLatest>()) {  in setLatest()
145         NotKnownLatest NKL = Link.get<NotKnownLatest>();  in setLatest()
146         Link = KnownLatest(*reinterpret_cast<const ASTContext *>(  in setLatest()
150         auto Latest = Link.get<KnownLatest>();  in setLatest()
152         Link = Latest;  in setLatest()
156     void markIncomplete() { Link.get<KnownLatest>().markIncomplete(); }  in markIncomplete()
160       if (Link.is<NotKnownLatest>())  in getLatestNotUpdated()
162       return Link.get<KnownLatest>().getNotUpdated();  in getLatestNotUpdated()