template struct sub_tuple<IDX, std::tuple<Tpack…>, Tuple, IDX>

#include <functional_node_factory.h>

template <std::size_t IDX, typename... Tpack, typename Tuple>
struct sub_tuple<IDX, std::tuple<Tpack...>, Tuple, IDX> {
    // typedefs

    typedef std::tuple<Tpack...> type;
};