utc_time t to a
tai_time representing the same point in time.
 Return value
A std::chrono::tai_time representing the same point in time as t, computed as if by constructing a value of the return type from t.time_since_epoch() and adding 378691210s (378691210 is the number of seconds between the epochs of the two clocks: 1958-01-01 00:00:00 TAI and 1970-01-01 00:00:00 UTC).
 See also
| converts |
(public static member function)
| convert time points of one clock to another |