Method ReverseUseless

util/ysaveload.h:431–437

struct TTupleSerializer {
    template <class F, class Tuple, size_t... Indices>
    static inline void ReverseUseless(F&& f, Tuple&& t, std::index_sequence<Indices...>) {
        ApplyToMany(
            std::forward<F>(f),
            // We need to do this trick because we don't want to break backward compatibility.
            // Tuples are being packed in reverse order.
            std::get<std::tuple_size<T>::value - Indices - 1>(std::forward<Tuple>(t))...);
    }

    static inline void Save(IOutputStream* stream, const T& t) {
        ReverseUseless([&](const auto& v) { ::Save(stream, v); }, t,