[time.clock.file.members] (original) (raw)

The type denoted by file_clock provides precisely one of the following two sets of static member functions:template<class Duration> static sys_time<_see below_> to_sys(const file_time<Duration>&);template<class Duration> static file_time<_see below_> from_sys(const sys_time<Duration>&);or:template<class Duration> static utc_time<_see below_> to_utc(const file_time<Duration>&);template<class Duration> static file_time<_see below_> from_utc(const utc_time<Duration>&);

These member functions shall provide time_point conversions consistent with those specified byutc_clock, tai_clock, and gps_clock.

The Duration of the resultant time_pointis computed from the Duration of the input time_point.