[time.clock.cast.utc] (original) (raw)

30 Time library [time]

30.7 Clocks [time.clock]

30.7.10 time_point conversions [time.clock.cast]

30.7.10.5 Conversions between utc_clock and other clocks [time.clock.cast.utc]

template<class SourceClock> struct clock_time_conversion<utc_clock, SourceClock> { template<class Duration> auto operator()(const time_point<SourceClock, Duration>& t) const -> decltype(SourceClock::to_utc(t));};

template<class Duration> auto operator()(const time_point<SourceClock, Duration>& t) const -> decltype(SourceClock::to_utc(t));

Constraints: SourceClock​::​to_utc(t) is well-formed.

Mandates: SourceClock​::​to_utc(t) returns a utc_time<Duration2>for some type Duration2 ([time.point.general]).

Returns: SourceClock​::​to_utc(t).

template<class DestClock> struct clock_time_conversion<DestClock, utc_clock> { template<class Duration> auto operator()(const utc_time<Duration>& t) const -> decltype(DestClock::from_utc(t));};

template<class Duration> auto operator()(const utc_time<Duration>& t) const -> decltype(DestClock::from_utc(t));

Constraints: DestClock​::​from_utc(t) is well-formed.

Mandates: DestClock​::​from_utc(t) returns a time_point<DestClock, Duration2>for some type Duration2 ([time.point.general]).

Returns: DestClock​::​from_utc(t).