Method unload

include/boost/leaf/context.hpp:198–205

        }

        BOOST_LEAF_CONSTEXPR static void unload( Tup & tup, int err_id ) noexcept(!BOOST_LEAF_CFG_CAPTURE)
        {
            static_assert(!std::is_same<error_info, typename std::decay<decltype(std::get<I-1>(tup))>::type>::value, "Bug in LEAF: context type deduction");
            BOOST_LEAF_ASSERT(err_id != 0);
            auto & sl = std::get<I-1>(tup);
            sl.unload(err_id);
            tuple_for_each<I-1,Tup>::unload(tup, err_id);
        }

        template <class Encoder>
        static void serialize_to(Encoder & e, void const * tup, error_id id)