// If the deadline is in the future, return the remaining time until
// then. Otherwise return a TimedOut error.
If the deadline is in the future, return the remaining time until
then. Otherwise return a TimedOut error.
If the deadline is in the future return the remaining time until then . Otherwise return a TimedOut error .
fn time_until_deadline(deadline: Instant) -> io::Result<Duration> {
    let now = Instant::now();
    match deadline.checked_duration_since(now) {
        None => Err(io_err_timeout("timed out reading response".to_string())),
        Some(duration) => Ok(duration),
    }
}
fn time_until_deadline ( deadline : Instant ) -> io :: Result < Duration > { let now = Instant :: now ( ) ; match deadline . checked_duration_since ( now ) { None => Err ( io_err_timeout ( " " . to_string ( ) ) ) , Some ( duration ) => Ok ( duration ) , } }
If the deadline is in the future, return the remaining time until
then.
If the deadline is in the future return the remaining time until then .
deadline
Instant