Trait futures_util::future::FusedFuture

pub trait FusedFuture: Future {
    // Required method
    fn is_terminated(&self) -> bool;
}

A future which tracks whether or not the underlying future should no longer be polled.

is_terminated will return true if a future should no longer be polled. Usually, this state occurs after poll (or try_poll) returned Poll::Ready. However, is_terminated may also return true if a future 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 underlying future should no longer be polled.

Implementations on Foreign Types

impl<F> FusedFuture for &mut F

where F: FusedFuture + Unpin + ?Sized,

fn is_terminated(&self) -> bool

impl<P> FusedFuture for Pin<P>

where P: DerefMut + Unpin, <P as Deref>::Target: FusedFuture,

fn is_terminated(&self) -> bool

Implementors

impl<A, B> FusedFuture for Either<A, B>

where A: FusedFuture, B: FusedFuture<Output = A::Output>,

impl<A, B> FusedFuture for Select<A, B>

where A: Future + Unpin, B: Future + Unpin,

impl<F> FusedFuture for Flatten<F>

where Flatten<F, <F as Future>::Output>: FusedFuture, F: Future,

impl<F, R> FusedFuture for Lazy<F>

where F: FnOnce(&mut Context<'_>) -> R,

impl<F: FusedFuture> FusedFuture for OptionFuture<F>

impl<Fut1, Fut2> FusedFuture for TryFlatten<Fut1, Fut2>

where TryFlatten<Fut1, Fut2>: FusedFuture,

impl<Fut1, Fut2, F> FusedFuture for AndThen<Fut1, Fut2, F>

where TryFlatten<MapOk<Fut1, F>, Fut2>: FusedFuture,

impl<Fut1, Fut2, F> FusedFuture for OrElse<Fut1, Fut2, F>

where TryFlattenErr<MapErr<Fut1, F>, Fut2>: FusedFuture,

impl<Fut1, Fut2, F> FusedFuture for Then<Fut1, Fut2, F>

where Flatten<Map<Fut1, F>, Fut2>: FusedFuture,

impl<Fut1: FusedFuture, Fut2: FusedFuture> FusedFuture for Join<Fut1, Fut2>

impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture> FusedFuture for Join3<Fut1, Fut2, Fut3>

impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture, Fut4: FusedFuture> FusedFuture for Join4<Fut1, Fut2, Fut3, Fut4>

impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture, Fut4: FusedFuture, Fut5: FusedFuture> FusedFuture for Join5<Fut1, Fut2, Fut3, Fut4, Fut5>

impl<Fut> FusedFuture for NeverError<Fut>

where Map<Fut, OkFn<Never>>: FusedFuture,

impl<Fut> FusedFuture for UnitError<Fut>

where Map<Fut, OkFn<()>>: FusedFuture,

impl<Fut, E> FusedFuture for ErrInto<Fut, E>

where MapErr<Fut, IntoFn<E>>: FusedFuture,

impl<Fut, E> FusedFuture for OkInto<Fut, E>

where MapOk<Fut, IntoFn<E>>: FusedFuture,

impl<Fut, F> FusedFuture for Inspect<Fut, F>

where Map<Fut, InspectFn<F>>: FusedFuture,

impl<Fut, F> FusedFuture for InspectErr<Fut, F>

where Inspect<IntoFuture<Fut>, InspectErrFn<F>>: FusedFuture,

impl<Fut, F> FusedFuture for InspectOk<Fut, F>

where Inspect<IntoFuture<Fut>, InspectOkFn<F>>: FusedFuture,

impl<Fut, F> FusedFuture for Map<Fut, F>

where Map<Fut, F>: FusedFuture,

impl<Fut, F> FusedFuture for MapErr<Fut, F>

where Map<IntoFuture<Fut>, MapErrFn<F>>: FusedFuture,

impl<Fut, F> FusedFuture for MapOk<Fut, F>

where Map<IntoFuture<Fut>, MapOkFn<F>>: FusedFuture,

impl<Fut, F> FusedFuture for UnwrapOrElse<Fut, F>

where Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: FusedFuture,

impl<Fut, F, G> FusedFuture for MapOkOrElse<Fut, F, G>

where Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: FusedFuture,

impl<Fut, T> FusedFuture for MapInto<Fut, T>

where Map<Fut, IntoFn<T>>: FusedFuture,

impl<Fut: Future> FusedFuture for MaybeDone<Fut>

impl<Fut: Future> FusedFuture for Fuse<Fut>

impl<Fut: TryFuture + FusedFuture> FusedFuture for IntoFuture<Fut>

impl<Fut: TryFuture> FusedFuture for TryMaybeDone<Fut>

impl<St> FusedFuture for Concat<St>

where St: FusedStream, St::Item: Extend<<St::Item as IntoIterator>::Item> + IntoIterator + Default,

impl<St, A, B, FromA, FromB> FusedFuture for Unzip<St, FromA, FromB>

where St: FusedStream<Item = (A, B)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>,

impl<St, C> FusedFuture for Collect<St, C>

where St: FusedStream, C: Default + Extend<St::Item>,

impl<St, C> FusedFuture for TryCollect<St, C>

where St: TryStream + FusedStream, C: Default + Extend<St::Ok>,

impl<St, F> FusedFuture for NextIf<'_, St, F>

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

impl<St, Fut, F> FusedFuture for All<St, Fut, F>

where St: Stream, F: FnMut(St::Item) -> Fut, Fut: Future<Output = bool>,

impl<St, Fut, F> FusedFuture for Any<St, Fut, F>

where St: Stream, F: FnMut(St::Item) -> Fut, Fut: Future<Output = bool>,

impl<St, Fut, F> FusedFuture for ForEach<St, Fut, F>

where St: FusedStream, F: FnMut(St::Item) -> Fut, Fut: Future<Output = ()>,

impl<St, Fut, F> FusedFuture for TryAll<St, Fut, F>

where St: TryStream, F: FnMut(St::Ok) -> Fut, Fut: Future<Output = bool>,

impl<St, Fut, F> FusedFuture for TryAny<St, Fut, F>

where St: TryStream, F: FnMut(St::Ok) -> Fut, Fut: Future<Output = bool>,

impl<St, Fut, T, F> FusedFuture for Fold<St, Fut, T, F>

where St: Stream, F: FnMut(T, St::Item) -> Fut, Fut: Future<Output = T>,

impl<St, Fut, T, F> FusedFuture for TryFold<St, Fut, T, F>

where St: TryStream, F: FnMut(T, St::Ok) -> Fut, Fut: TryFuture<Ok = T, Error = St::Error>,

impl<St, T> FusedFuture for NextIfEq<'_, St, T>

where St: Stream, T: ?Sized, St::Item: PartialEq<T>,

impl<St: FusedStream> FusedFuture for Count<St>

impl<St: Stream + Unpin> FusedFuture for StreamFuture<St>

impl<St: Stream> FusedFuture for Peek<'_, St>

impl<St: Stream> FusedFuture for PeekMut<'_, St>

impl<St: ?Sized + FusedStream + Unpin> FusedFuture for Next<'_, St>

impl<St: ?Sized + FusedStream + Unpin> FusedFuture for SelectNextSome<'_, St>

impl<St: ?Sized + TryStream + Unpin + FusedStream> FusedFuture for TryNext<'_, St>

impl<T> FusedFuture for Pending<T>

impl<T> FusedFuture for Ready<T>

impl<T, F: Fn() -> T> FusedFuture for AlwaysReady<T, F>

impl<T: Future> FusedFuture for PollImmediate<T>