futures_util/future/try_future/
into_future.rs

1use core::pin::Pin;
2use futures_core::future::{FusedFuture, Future, TryFuture};
3use futures_core::task::{Context, Poll};
4use pin_project_lite::pin_project;
5
6pin_project! {
7    /// Future for the [`into_future`](super::TryFutureExt::into_future) method.
8    #[derive(Debug)]
9    #[must_use = "futures do nothing unless you `.await` or poll them"]
10    pub struct IntoFuture<Fut> {
11        #[pin]
12        future: Fut,
13    }
14}
15
16impl<Fut> IntoFuture<Fut> {
17    #[inline]
18    pub(crate) fn new(future: Fut) -> Self {
19        Self { future }
20    }
21}
22
23impl<Fut: TryFuture + FusedFuture> FusedFuture for IntoFuture<Fut> {
24    fn is_terminated(&self) -> bool {
25        self.future.is_terminated()
26    }
27}
28
29impl<Fut: TryFuture> Future for IntoFuture<Fut> {
30    type Output = Result<Fut::Ok, Fut::Error>;
31
32    #[inline]
33    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
34        self.project().future.try_poll(cx)
35    }
36}