#pragma once

#include "counting_sort.hpp"

#include <cstddef>
#include <type_traits>
#include <utility>

namespace detail
{
template <typename Radix>
auto nth_radix(std::size_t radix_number, Radix radix)
{
    return [radix_number, radix = std::move(radix)](auto n) {
        using value_type = decltype(n);
        static_assert(std::is_integral_v<value_type> && std::is_unsigned_v<value_type>, "");
        using traits = counting_sort_traits<value_type, Radix>;

        return radix(static_cast<value_type>(n >> (traits::radix_size * radix_number)));
    };
}
} // namespace detail