Struct futures_util::stream::NextIf

#[must_use = "futures do nothing unless polled"]
pub struct NextIf<'a, St: Stream, F> { /* fields omitted */ }

Future for the Peekable::next_if method.

Trait Implementations

impl<St, F> Debug for NextIf<'_, St, F> where
    St: Stream + Debug,
    St::Item: Debug, 

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<St, F> FusedFuture for NextIf<'_, St, F> where
    St: Stream,
    F: for<'a> FnOnce1<&'a St::Item, Output = bool>, 

fn is_terminated(&self) -> bool

Returns true if the underlying future should no longer be polled.

impl<St, F> Future for NextIf<'_, St, F> where
    St: Stream,
    F: for<'a> FnOnce1<&'a St::Item, Output = bool>, 

type Output = Option<St::Item>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.

impl<'__pin, 'a, St: Stream, F> Unpin for NextIf<'a, St, F> where
    __Origin<'__pin, 'a, St, F>: Unpin,