NAME

std::chrono::time_point::min - std::chrono::time_point::min

Synopsis

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(std::chrono::duration::min()).

Parameters

(none)

Return value

the smallest possible time_point

Example

// Run this code

#include <chrono>
#include <iomanip>
#include <iostream>
#include <ratio>
#include <string>

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<int>(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 **