# std::chrono::time_point<Clock,Duration>::min

< cpp‎ | chrono‎ | time point

static constexpr time_point min(); |  | (C++20 前)
static constexpr time_point min() noexcept; |  | (C++20 起)

返回拥有最小可能时长的 `time_point` ，即 time_point(std::chrono::duration::min()) 。

### 参数

（无）

### 返回值

最小的可能的 `time_point`

### 示例

    #include <iostream>
    #include <ratio>
    #include <chrono>

    constexpr auto steady_min = std::chrono::steady_clock::time_point::min();

    int main()
    {
        auto last_frame = steady_min;
        std::chrono::duration<float, std::milli> game_time {0.0F};

        for (std::size_t count = 0; count < 5; ++count) {
            auto current_frame = std::chrono::steady_clock::now();
            // 若是首帧则初始化计时器：
            if (last_frame == steady_min)
                last_frame = current_frame;
            game_time += current_frame - last_frame;
            std::cout << "Drawing frame at " << game_time.count() << " ms\n";
            // 在时间偏移 game_time 绘制帧……
        }
    }

可能的输出：

    Drawing frame at 0 ms
    Drawing frame at 0.17551 ms
    Drawing frame at 0.358325 ms
    Drawing frame at 0.545384 ms
    Drawing frame at 0.736717 ms