template struct sub_tuple<IDX1, std::tuple<Tpack…>, Tuple, IDX2>

#include <functional_node_factory.h>

template <size_t IDX1, typename... Tpack, typename Tuple, size_t IDX2>
struct sub_tuple<IDX1, std::tuple<Tpack...>, Tuple, IDX2>: public sub_tuple {
};