FreeBSD Manual Pages
std::chrono::utc_clock(3) C++ Standard Libary std::chrono::utc_clock(3) NAME std::chrono::utc_clock - std::chrono::utc_clock Synopsis Defined in header <chrono> class utc_clock; (since C++20) The clock std::chrono::utc_clock is a Clock that represents Coordi- nated Universal Time (UTC). It measures time since 00:00:00 UTC, Thursday, 1 January 1970, including leap seconds. utc_clock meets the Clock requirements. It does not meet the Triv- ialClock requirements unless the implementation can guarantee that now() does not throw an exception. Time point family Defined in namespace std::chrono template<class Duration> using utc_time = std::chrono::time_point<std::chrono::utc_clock, (since C++20) Duration>; using utc_seconds = utc_time<std::chrono::seconds>; (since C++20) operator<<(std::chrono::utc_time) performs stream output on a utc_time (C++20) (function template) from_stream(std::chrono::utc_time) parses a utc_time from a stream according to (C++20) the provided format (function template) std::formatter<std::chrono::utc_time> specialization of std::format- ter that formats (C++20) a utc_time according to the provided format (class template specializa- tion) Member types Member type Definition rep signed arithmetic type representing the number of ticks in the clock's duration period a std::ratio type representing the tick period of the clock, in seconds duration std::chrono::duration<rep, period>, capable of repre- senting negative durations time_point std::chrono::time_point<std::chrono::utc_clock> Member constants true if the time between ticks is always constant, i.e. constexpr bool is_steady calls to now() return values that increase monotonically [static] even in case of some external clock adjust- ment, otherwise false (public static member constant) Member functions now returns a std::chrono::time_point representing the current point in time [static] (public static member function) to_sys converts utc_time to sys_time [static] (public static member function) from_sys converts sys_time to utc_time [static] (public static member function) Non-member functions get_leap_second_info obtains leap second insertion information from a utc_time (C++20) object (function template) Helper classes leap_second_info leap second insertion information (C++20) (class) Notes The official UTC epoch is 1 January 1972. utc_clock uses 1 January 1970 instead to be consistent with std::chrono::system_clock. http://cppreference.com 2022.07.31 std::chrono::utc_clock(3)
NAME | Synopsis | Member types | Member constants | Member functions | Non-member functions | Helper classes | Notes
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::chrono::utc_clock&sektion=3&manpath=FreeBSD+Ports+15.0>