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#pragma once
#include <chrono>
#include <type_traits>
namespace time_units {
template<typename repr, typename ratio>
using duration = std::chrono::duration<repr, ratio>;
template<typename t, typename u>
static inline constexpr auto time_cast(const u& in)
{
return std::chrono::duration_cast<t>(in);
}
using secs = duration<double, std::ratio<1, 1>>;
using secs_ = duration<long long, std::ratio<1, 1>>;
using ms = duration<double, std::milli>;
using ms_ = duration<long long, std::milli>;
using us = duration<double, std::micro>;
using us_ = duration<long long, std::micro>;
using ns = duration<long long, std::nano>;
} // ns time_units
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