constexpr auto & operator=(const typename Container::value_type & value) (1) constexpr auto & operator=(typename Container::value_type && value) (2) (1) constexpr auto & operator=(const typename Container::value_type & value) MISSING Parameters const typename Container::value_type & value (2) constexpr auto & operator=(typename Container::value_type && value) MISSING Parameters typename Container::value_type && value