std::chrono::time_point<Clock,Duration>::max
来自cppreference.com
< cpp | chrono | time point
| static constexpr time_point max(); |
(C++20 前) | |
| static constexpr time_point max() noexcept; |
(C++20 起) | |
返回拥有最大可能时长的 time_point ，即 time_point(std::chrono::duration::max()) 。
参数
（无）
返回值
最大的可能的 time_point
示例
运行此代码
#include <chrono> #include <vector> #include <iostream> int main() { std::chrono::time_point<std::chrono::system_clock> now = std::chrono::system_clock::now(); std::vector<std::chrono::time_point<std::chrono::system_clock>> times { now - std::chrono::hours(24), now - std::chrono::hours(48), now + std::chrono::hours(24), }; std::chrono::time_point<std::chrono::system_clock> earliest = std::chrono::time_point<std::chrono::system_clock>::max(); std::cout << "all times:\n"; for (const auto &time : times) { std::time_t t = std::chrono::system_clock::to_time_t(time); std::cout << std::ctime(&t); if (time < earliest) earliest = time; } std::time_t t = std::chrono::system_clock::to_time_t(earliest); std::cout << "earliest:\n" << std::ctime(&t); }
可能的输出：
all times: Sun Oct 7 19:06:48 2012 Sat Oct 6 19:06:48 2012 Tue Oct 9 19:06:48 2012 earliest: Sat Oct 6 19:06:48 2012
