id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 12967,boost::none_t should be a literal type like std::nullopt_t,Matt Rice ,Fernando Cacciola,The `boost::none_t` explicit constructor is not `constexpr` making it a non literal type. `std::nullopt_t`'s constructor is constexpr making it a non-aggregate literal type as dictated by the standard.,Bugs,new,Boost 1.68.0,optional,Boost 1.67.0,Problem,,,