#pragma once
#include <cstddef>
#include <tuple>
#include <utility>

namespace kpn::tmp {

// repeat_tuple_t<T, N> — std::tuple<T, T, ..., T> with N elements.
// Used by FanoutNode and fanout_groups to express N homogeneous outputs.

template<typename T, std::size_t N, typename Seq = std::make_index_sequence<N>>
struct repeat_tuple;

template<typename T, std::size_t N, std::size_t... Is>
struct repeat_tuple<T, N, std::index_sequence<Is...>> {
    template<std::size_t> using always_T = T;
    using type = std::tuple<always_T<Is>...>;
};

template<typename T, std::size_t N>
using repeat_tuple_t = typename repeat_tuple<T, N>::type;

} // namespace kpn::tmp