[−][src]Type Definition futures::
type Poll<T, E> = Result<Async<T>, E>;
Return type of the
Future::poll method, indicates whether a future's value
is ready or not.
Ok(Async::Ready(t))means that a future has successfully resolved
Ok(Async::NotReady)means that a future is not ready to complete yet
Err(e)means that a future has completed with the given failure