[−][src]Trait futures::stream::FusedStream

pub trait FusedStream {
    fn is_terminated(&self) -> bool;
}

A Stream or TryStream which tracks whether or not the underlying stream should no longer be polled.

is_terminated will return true if a future should no longer be polled. Usually, this state occurs after poll_next (or try_poll_next) returned Poll::Ready(None). However, is_terminated may also return true if a stream has become inactive and can no longer make progress and should be ignored or dropped rather than being polled again.

Required methods

fn is_terminated(&self) -> bool

Returns true if the stream should no longer be polled.

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Implementations on Foreign Types

impl<St, F> FusedStream for MapOk<St, F> where
    St: FusedStream, 
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impl<St, F> FusedStream for MapErr<St, F> where
    St: FusedStream, 
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Implementors

impl<Fut> FusedStream for FlattenStream<Fut> where
    Fut: Future,
    <Fut as Future>::Output: Stream,
    <Fut as Future>::Output: FusedStream, 
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impl<Fut> FusedStream for FuturesUnordered<Fut> where
    Fut: Future, 
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impl<S> FusedStream for Fuse<S>
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impl<St> FusedStream for BufferUnordered<St> where
    St: Stream,
    <St as Stream>::Item: Future, 
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impl<St> FusedStream for Flatten<St> where
    St: Stream + FusedStream, 
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impl<St> FusedStream for IntoStream<St> where
    St: FusedStream, 
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impl<St> FusedStream for Peekable<St> where
    St: Stream, 
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impl<St> FusedStream for SelectAll<St> where
    St: Unpin + Stream, 
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impl<St> FusedStream for Skip<St> where
    St: FusedStream, 
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impl<St, E> FusedStream for ErrInto<St, E> where
    St: FusedStream, 
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impl<St, F> FusedStream for Inspect<St, F> where
    St: Stream + FusedStream, 
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impl<St, F> FusedStream for Map<St, F> where
    St: FusedStream, 
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impl<St, Fut, F> FusedStream for Filter<St, Fut, F> where
    F: FnMut(&<St as Stream>::Item) -> Fut,
    Fut: Future<Output = bool>,
    St: Stream + FusedStream, 
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impl<St, Fut, F> FusedStream for SkipWhile<St, Fut, F> where
    St: Stream + FusedStream, 
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impl<St, Fut, F> FusedStream for Then<St, Fut, F> where
    St: FusedStream, 
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impl<St, Fut, F, T> FusedStream for FilterMap<St, Fut, F> where
    F: FnMut(<St as Stream>::Item) -> Fut,
    Fut: Future<Output = Option<T>>,
    St: Stream + FusedStream, 
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impl<St1, St2> FusedStream for Chain<St1, St2> where
    St2: FusedStream, 
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impl<St1, St2> FusedStream for Select<St1, St2>
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impl<St1, St2> FusedStream for Zip<St1, St2> where
    St1: Stream,
    St2: Stream, 
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impl<T> FusedStream for Receiver<T>
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impl<T> FusedStream for UnboundedReceiver<T>
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impl<T, F, Fut> FusedStream for Unfold<T, F, Fut>
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