Trait futures::stream::FusedStream [−][src]
pub trait FusedStream: Stream { fn is_terminated(&self) -> bool; }
Expand description
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
fn is_terminated(&self) -> bool
Returns true
if the stream should no longer be polled.
Implementations on Foreign Types
Implementors
impl<A, B> FusedStream for Either<A, B> where
B: FusedStream<Item = <A as Stream>::Item>,
A: FusedStream,
impl<B, St, S, Fut, F> FusedStream for Scan<St, S, Fut, F> where
F: FnMut(&mut S, <St as Stream>::Item) -> Fut,
Fut: Future<Output = Option<B>>,
St: FusedStream,
impl<F> FusedStream for FlattenStream<F> where
F: Future,
Flatten<F, <F as Future>::Output>: FusedStream,
impl<Fut> FusedStream for TryFlattenStream<Fut> where
Fut: TryFuture,
TryFlatten<Fut, <Fut as TryFuture>::Ok>: 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
F: FnMut(U) -> St,
St: Stream<Item = Result<Item, <S as Sink<Item>>::Error>>,
S: FusedStream + Sink<Item>,
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, 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 Flatten<St> where
St: Stream,
Flatten<St, <St as Stream>::Item>: 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, 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, Fut, F> FusedStream for AndThen<St, Fut, F> where
F: FnMut(<St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Error = <St as TryStream>::Error>,
St: TryStream + FusedStream,
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,
impl<St, Fut, F> FusedStream for OrElse<St, Fut, F> where
F: FnMut(<St as TryStream>::Error) -> Fut,
Fut: TryFuture<Ok = <St as TryStream>::Ok>,
St: TryStream + FusedStream,
impl<St, Fut, F> FusedStream for SkipWhile<St, Fut, F> where
F: FnMut(&<St as Stream>::Item) -> Fut,
Fut: Future<Output = bool>,
St: FusedStream,
impl<St, Fut, F> FusedStream for TakeWhile<St, Fut, F> where
F: FnMut(&<St as Stream>::Item) -> Fut,
Fut: Future<Output = bool>,
St: FusedStream,
impl<St, Fut, F> FusedStream for Then<St, Fut, F> where
F: FnMut(<St as Stream>::Item) -> Fut,
Fut: Future,
St: FusedStream,
impl<St, Fut, F> FusedStream for TryFilter<St, Fut, F> where
F: FnMut(&<St as TryStream>::Ok) -> Fut,
Fut: Future<Output = bool>,
St: TryStream + FusedStream,
impl<St, Fut, F> FusedStream for TrySkipWhile<St, Fut, F> where
F: FnMut(&<St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = <St as TryStream>::Error>,
St: TryStream + FusedStream,
impl<St, Fut, F> FusedStream for TryTakeWhile<St, Fut, F> where
F: FnMut(&<St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = <St as TryStream>::Error>,
St: TryStream + FusedStream,
impl<St, Fut, F, T> FusedStream for FilterMap<St, Fut, F> where
F: FnMut1<<St as Stream>::Item, Output = Fut>,
Fut: Future<Output = Option<T>>,
St: Stream + FusedStream,
impl<St, Fut, F, T> FusedStream for TryFilterMap<St, Fut, F> where
F: FnMut(<St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = Option<T>, Error = <St as TryStream>::Error>,
St: TryStream + FusedStream,