Trait futures::stream::FusedStream

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

A stream 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.

Implementations on Foreign Types

impl<S> FusedStream for Box<S, Global> where
    S: FusedStream + Unpin + ?Sized, 

fn is_terminated(&self) -> bool

impl<'_, F> FusedStream for &'_ mut F where
    F: FusedStream + Unpin + ?Sized, 

fn is_terminated(&self) -> bool

impl<P> FusedStream for Pin<P> where
    P: DerefMut + Unpin,
    <P as Deref>::Target: FusedStream, 

fn is_terminated(&self) -> bool

Implementors

impl<A, B> FusedStream for Either<A, B> where
    A: FusedStream,
    B: FusedStream<Item = <A as Stream>::Item>, 

impl<A, F> FusedStream for RepeatWith<F> where
    F: FnMut() -> A, 

impl<B, St, S, Fut, F> FusedStream for Scan<St, S, Fut, F> where
    St: FusedStream,
    F: FnMut(&mut S, <St as Stream>::Item) -> Fut,
    Fut: Future<Output = Option<B>>, 

impl<F> FusedStream for FlattenStream<F> where
    F: Future,
    Flatten<F, <F as Future>::Output>: FusedStream, 

impl<F> FusedStream for futures::future::IntoStream<F> where
    Once<F>: FusedStream, 

impl<Fut> FusedStream for TryFlattenStream<Fut> where
    Fut: TryFuture,
    TryFlatten<Fut, <Fut as TryFuture>::Ok>: FusedStream, 

impl<Fut> FusedStream for FuturesOrdered<Fut> where
    Fut: Future, 

impl<Fut> FusedStream for FuturesUnordered<Fut> where
    Fut: Future, 

impl<Fut> FusedStream for Once<Fut> where
    Fut: Future, 

impl<Fut, Si> FusedStream for FlattenSink<Fut, Si> where
    TryFlatten<Fut, Si>: FusedStream, 

impl<S> FusedStream for Fuse<S> where
    S: Stream, 

impl<S> FusedStream for PollImmediate<S> where
    S: Stream, 

impl<S, F> FusedStream for SinkMapErr<S, F> where
    S: FusedStream, 

impl<S, Item> FusedStream for Buffer<S, Item> where
    S: Sink<Item> + FusedStream, 

impl<S, Item, E> FusedStream for SinkErrInto<S, Item, E> where
    S: Sink<Item> + FusedStream,
    <S as Sink<Item>>::Error: Into<E>, 

impl<S, Item, U, St, F> FusedStream for WithFlatMap<S, Item, U, St, F> where
    S: FusedStream + Sink<Item>,
    F: FnMut(U) -> St,
    St: Stream<Item = Result<Item, <S as Sink<Item>>::Error>>, 

impl<St1, St2> FusedStream for Chain<St1, St2> where
    St1: Stream,
    St2: FusedStream<Item = <St1 as Stream>::Item>, 

impl<St1, St2> FusedStream for Select<St1, St2> where
    St1: Stream,
    St2: Stream<Item = <St1 as Stream>::Item>, 

impl<St1, St2> FusedStream for Zip<St1, St2> where
    St1: Stream,
    St2: Stream, 

impl<St1, St2, Clos, State> FusedStream for SelectWithStrategy<St1, St2, Clos, State> where
    St1: Stream,
    St2: Stream<Item = <St1 as Stream>::Item>,
    Clos: FnMut(&mut State) -> PollNext, 

impl<St> FusedStream for BufferUnordered<St> where
    St: Stream,
    <St as Stream>::Item: Future, 

impl<St> FusedStream for CatchUnwind<St> where
    St: FusedStream + UnwindSafe, 

impl<St> FusedStream for Chunks<St> where
    St: FusedStream, 

impl<St> FusedStream for Cycle<St> where
    St: Clone + Stream, 

impl<St> FusedStream for Enumerate<St> where
    St: Stream + FusedStream, 

impl<St> FusedStream for Flatten<St> where
    St: Stream,
    Flatten<St, <St as Stream>::Item>: FusedStream, 

impl<St> FusedStream for futures::stream::IntoStream<St> where
    St: TryStream + FusedStream, 

impl<St> FusedStream for Peekable<St> where
    St: Stream, 

impl<St> FusedStream for ReadyChunks<St> where
    St: FusedStream, 

impl<St> FusedStream for SelectAll<St> where
    St: Stream + Unpin, 

impl<St> FusedStream for Skip<St> where
    St: FusedStream, 

impl<St> FusedStream for Take<St> where
    St: FusedStream, 

impl<St> FusedStream for TryChunks<St> where
    St: TryStream + FusedStream, 

impl<St> FusedStream for TryFlatten<St> where
    St: TryStream + FusedStream,
    <St as TryStream>::Ok: TryStream,
    <<St as TryStream>::Ok as TryStream>::Error: From<<St as TryStream>::Error>, 

impl<St, E> FusedStream for ErrInto<St, E> where
    MapErr<St, IntoFn<E>>: FusedStream, 

impl<St, F> FusedStream for Inspect<St, F> where
    Map<St, InspectFn<F>>: FusedStream, 

impl<St, F> FusedStream for InspectErr<St, F> where
    Inspect<IntoStream<St>, InspectErrFn<F>>: FusedStream, 

impl<St, F> FusedStream for InspectOk<St, F> where
    Inspect<IntoStream<St>, InspectOkFn<F>>: FusedStream, 

impl<St, F> FusedStream for Map<St, F> where
    St: FusedStream,
    F: FnMut1<<St as Stream>::Item>, 

impl<St, F> FusedStream for MapErr<St, F> where
    Map<IntoStream<St>, MapErrFn<F>>: FusedStream, 

impl<St, F> FusedStream for MapOk<St, F> where
    Map<IntoStream<St>, MapOkFn<F>>: FusedStream, 

impl<St, Fut> FusedStream for TakeUntil<St, Fut> where
    St: Stream,
    Fut: Future, 

impl<St, Fut, F> FusedStream for AndThen<St, Fut, F> where
    St: TryStream + FusedStream,
    F: FnMut(<St as TryStream>::Ok) -> Fut,
    Fut: TryFuture<Error = <St as TryStream>::Error>, 

impl<St, Fut, F> FusedStream for Filter<St, Fut, F> where
    St: Stream + FusedStream,
    F: FnMut(&<St as Stream>::Item) -> Fut,
    Fut: Future<Output = bool>, 

impl<St, Fut, F> FusedStream for OrElse<St, Fut, F> where
    St: TryStream + FusedStream,
    F: FnMut(<St as TryStream>::Error) -> Fut,
    Fut: TryFuture<Ok = <St as TryStream>::Ok>, 

impl<St, Fut, F> FusedStream for SkipWhile<St, Fut, F> where
    St: FusedStream,
    F: FnMut(&<St as Stream>::Item) -> Fut,
    Fut: Future<Output = bool>, 

impl<St, Fut, F> FusedStream for TakeWhile<St, Fut, F> where
    St: FusedStream,
    F: FnMut(&<St as Stream>::Item) -> Fut,
    Fut: Future<Output = bool>, 

impl<St, Fut, F> FusedStream for Then<St, Fut, F> where
    St: FusedStream,
    F: FnMut(<St as Stream>::Item) -> Fut,
    Fut: Future, 

impl<St, Fut, F> FusedStream for TryFilter<St, Fut, F> where
    St: TryStream + FusedStream,
    F: FnMut(&<St as TryStream>::Ok) -> Fut,
    Fut: Future<Output = bool>, 

impl<St, Fut, F> FusedStream for TrySkipWhile<St, Fut, F> where
    St: TryStream + FusedStream,
    F: FnMut(&<St as TryStream>::Ok) -> Fut,
    Fut: TryFuture<Ok = bool, Error = <St as TryStream>::Error>, 

impl<St, Fut, F> FusedStream for TryTakeWhile<St, Fut, F> where
    St: TryStream + FusedStream,
    F: FnMut(&<St as TryStream>::Ok) -> Fut,
    Fut: TryFuture<Ok = bool, Error = <St as TryStream>::Error>, 

impl<St, Fut, F, T> FusedStream for FilterMap<St, Fut, F> where
    St: Stream + FusedStream,
    F: FnMut1<<St as Stream>::Item, Output = Fut>,
    Fut: Future<Output = Option<T>>, 

impl<St, Fut, F, T> FusedStream for TryFilterMap<St, Fut, F> where
    St: TryStream + FusedStream,
    Fut: TryFuture<Ok = Option<T>, Error = <St as TryStream>::Error>,
    F: FnMut(<St as TryStream>::Ok) -> Fut, 

impl<St, U, F> FusedStream for FlatMap<St, U, F> where
    Flatten<Map<St, F>, U>: FusedStream, 

impl<T> FusedStream for Receiver<T>

impl<T> FusedStream for UnboundedReceiver<T>

impl<T> FusedStream for Empty<T>

impl<T> FusedStream for Pending<T>

impl<T> FusedStream for Repeat<T> where
    T: Clone, 

impl<T, F, Fut, Item> FusedStream for Unfold<T, F, Fut> where
    F: FnMut(T) -> Fut,
    Fut: Future<Output = Option<(Item, T)>>,