Function futures_util::future::maybe_done

source · [−]

pub fn maybe_done<Fut: Future>(future: Fut) -> MaybeDone<Fut>ⓘNotable traits for MaybeDone<Fut>
impl<Fut: Future> Future for MaybeDone<Fut>    type Output = ();

Expand description

Wraps a future into a MaybeDone

Examples

use futures::future;
use futures::pin_mut;

let future = future::maybe_done(async { 5 });
pin_mut!(future);
assert_eq!(future.as_mut().take_output(), None);
let () = future.as_mut().await;
assert_eq!(future.as_mut().take_output(), Some(5));
assert_eq!(future.as_mut().take_output(), None);