clock_time_conversion<DestClock, SourceClock>{}(t)
clock_time_conversion<DestClock, system_clock>{}(
clock_time_conversion<system_clock, SourceClock>{}(t))
clock_time_conversion<DestClock, utc_clock>{}(
clock_time_conversion<utc_clock, SourceClock>{}(t))
clock_time_conversion<DestClock, utc_clock>{}(
clock_time_conversion<utc_clock, system_clock>{}(
clock_time_conversion<system_clock, SourceClock>{}(t)))
clock_time_conversion<DestClock, system_clock>{}(
clock_time_conversion<system_clock, utc_clock>{}(
clock_time_conversion<utc_clock, SourceClock>{}(t)))