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std::chrono::gps_clock(3) C++ Standard Libary std::chrono::gps_clock(3) NAME std::chrono::gps_clock - std::chrono::gps_clock Synopsis Defined in header <chrono> class gps_clock; (since C++20) The clock std::chrono::gps_clock is a Clock that represents Global Positioning System (GPS) time. It measures time since 00:00:00, 6 January 1980 UTC. Leap seconds are not inserted into GPS. Thus, every time a leap sec- ond is inserted into UTC, UTC falls another second behind GPS. As of December 2017, UTC is 18 seconds behind GPS, reflecting the 18 leap seconds inserted between 1980 and 2017. Thus, 2018-01-01 00:00:00 UTC is equivalent to 2018-01-01 00:00:18 GPS. GPS is a constant 19 seconds behind TAI. gps_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 gps_time = std::chrono::time_point<std::chrono::gps_clock, (since C++20) Duration>; using gps_seconds = gps_time<std::chrono::seconds>; (since C++20) operator<<(std::chrono::gps_time) performs stream output on a gps_time (C++20) (function template) from_stream(std::chrono::gps_time) parses a gps_time from a stream according to (C++20) the provided format (function template) std::formatter<std::chrono::gps_time> specialization of std::format- ter that formats (C++20) a gps_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::gps_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_utc converts a gps_time to utc_time [static] (public static member function) from_utc converts a utc_time to gps_time [static] (public static member function) http://cppreference.com 2022.07.31 std::chrono::gps_clock(3)
NAME | Synopsis | Member types | Member constants | Member functions
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