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22 lines
586 B
22 lines
586 B
3 weeks ago
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#pragma once
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#include "counting_sort.hpp"
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#include <cstddef>
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#include <type_traits>
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#include <utility>
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namespace detail
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{
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template <typename Radix>
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auto nth_radix(std::size_t radix_number, Radix radix)
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{
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return [radix_number, radix = std::move(radix)](auto n) {
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using value_type = decltype(n);
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static_assert(std::is_integral_v<value_type> && std::is_unsigned_v<value_type>, "");
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using traits = counting_sort_traits<value_type, Radix>;
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return radix(static_cast<value_type>(n >> (traits::radix_size * radix_number)));
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};
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}
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} // namespace detail
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