std::chrono::time_point<Clock,Duration>::min - cppreference.com (original) (raw)

| static constexpr time_point min(); | | (until C++20) | | -------------------------------------------- | | ------------- | | static constexpr time_point min() noexcept; | | (since C++20) |

Returns a time_point with the smallest possible duration, i.e. time_point(duration::min()).

[edit] Parameters

(none)

[edit] Return value

The smallest possible time_point.

[edit] Example

#include #include #include #include #include   constexpr auto steady_min = std::chrono::steady_clock::time_point::min();   void animate_frame_at_time_offset(double game_time) { std::cout << std::string(static_cast(game_time) % 10 + 1, '*') << '\n'; }   int main() { auto last_frame = steady_min; std::chrono::duration<double, std::micro> game_time{0.0};   for (int n = 0; n < 5; ++n) { const auto current_frame = std::chrono::steady_clock::now(); // initialize timer if first frame ever: if (last_frame == steady_min) last_frame = current_frame; game_time += current_frame - last_frame; std::cout << "Drawing frame at " << std::setprecision(10) << std::setw(8) << game_time.count() << " μs "; animate_frame_at_time_offset(game_time.count()); } }

Possible output:

Drawing frame at 0 μs * Drawing frame at 134.499 μs ***** Drawing frame at 274.337 μs ***** Drawing frame at 416.571 μs ******* Drawing frame at 561.124 μs **