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| Member functions | ||||
| Time point I/O | ||||
Defined in header <chrono> | ||
class gps_clock; | (since C++20) | |
The clockstd::chrono::gps_clock is aClock 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 second 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 behindTAI.
gps_clock meets theClock requirements. It does not meet theTrivialClock requirements unless the implementation can guarantee thatnow() does not throw an exception.
Contents |
Defined in namespace std::chrono | ||
template<class Duration> using gps_time=std::chrono::time_point<std::chrono::gps_clock, Duration>; | (since C++20) | |
using gps_seconds= gps_time<std::chrono::seconds>; | (since C++20) | |
performs stream output on agps_time(function template)[edit] | |
parses agps_time from a stream according to the provided format(function template)[edit] | |
formatting support forgps_time(class template specialization)[edit] |
| Member type | Definition |
rep | signed arithmetic type representing the number of ticks in the clock's duration |
period | astd::ratio type representing the tick period of the clock, in seconds |
duration | std::chrono::duration<rep, period>, capable of representing negative durations |
time_point | std::chrono::time_point<std::chrono::gps_clock> |
constexpr bool is_steady [static] | true if the time between ticks is always constant, i.e. calls tonow() return values that increase monotonically even in case of some external clock adjustment, otherwisefalse (public static member constant) |
[static] | returns astd::chrono::time_point representing the current point in time (public static member function)[edit] |
[static] | converts agps_time toutc_time(public static member function)[edit] |
[static] | converts autc_time togps_time(public static member function)[edit] |
