...one of the most highly
regarded and expertly designed C++ library projects in the
world. — Herb Sutter and Andrei
expires_after().) Set the stream's expiry
time relative to now.
void expires_from_now( const duration & expiry_time);
This function sets the expiry time associated with the stream. Stream
operations performed after this time (where the operations cannot be
completed using the internal buffers) will fail with the error
The expiry time to be used for the timer.