Trait futures_util::future::FusedFuture [−][src]
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 poll
ed again.
Required methods
pub fn is_terminated(&self) -> bool
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Returns true
if the underlying future should no longer be polled.
Implementations on Foreign Types
impl<F> FusedFuture for Box<F, Global> where
F: FusedFuture + Unpin + ?Sized,
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F: FusedFuture + Unpin + ?Sized,
pub fn is_terminated(&self) -> bool
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impl<P> FusedFuture for Pin<P> where
P: DerefMut + Unpin,
<P as Deref>::Target: FusedFuture,
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P: DerefMut + Unpin,
<P as Deref>::Target: FusedFuture,
pub fn is_terminated(&self) -> bool
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Implementors
impl<'_, F> FusedFuture for &'_ mut F where
F: FusedFuture + Unpin + ?Sized,
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F: FusedFuture + Unpin + ?Sized,
pub fn is_terminated(&self) -> bool
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impl<A, B> FusedFuture for Either<A, B> where
A: FusedFuture,
B: FusedFuture<Output = A::Output>,
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A: FusedFuture,
B: FusedFuture<Output = A::Output>,
fn is_terminated(&self) -> bool
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impl<A, B> FusedFuture for Select<A, B> where
A: Future + Unpin,
B: Future + Unpin,
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A: Future + Unpin,
B: Future + Unpin,
fn is_terminated(&self) -> bool
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impl<F> FusedFuture for Flatten<F> where
Flatten<F, <F as Future>::Output>: FusedFuture,
F: Future,
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Flatten<F, <F as Future>::Output>: FusedFuture,
F: Future,
fn is_terminated(&self) -> bool
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impl<F, R> FusedFuture for Lazy<F> where
F: FnOnce(&mut Context<'_>) -> R,
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F: FnOnce(&mut Context<'_>) -> R,
fn is_terminated(&self) -> bool
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impl<F: FusedFuture> FusedFuture for OptionFuture<F>
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fn is_terminated(&self) -> bool
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impl<Fut1, Fut2> FusedFuture for TryFlatten<Fut1, Fut2> where
TryFlatten<Fut1, Fut2>: FusedFuture,
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TryFlatten<Fut1, Fut2>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut1, Fut2, F> FusedFuture for AndThen<Fut1, Fut2, F> where
TryFlatten<MapOk<Fut1, F>, Fut2>: FusedFuture,
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TryFlatten<MapOk<Fut1, F>, Fut2>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut1, Fut2, F> FusedFuture for OrElse<Fut1, Fut2, F> where
TryFlattenErr<MapErr<Fut1, F>, Fut2>: FusedFuture,
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TryFlattenErr<MapErr<Fut1, F>, Fut2>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut1, Fut2, F> FusedFuture for Then<Fut1, Fut2, F> where
Flatten<Map<Fut1, F>, Fut2>: FusedFuture,
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Flatten<Map<Fut1, F>, Fut2>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut1: FusedFuture, Fut2: FusedFuture> FusedFuture for Join<Fut1, Fut2>
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fn is_terminated(&self) -> bool
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impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture> FusedFuture for Join3<Fut1, Fut2, Fut3>
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fn is_terminated(&self) -> bool
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impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture, Fut4: FusedFuture> FusedFuture for Join4<Fut1, Fut2, Fut3, Fut4>
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fn is_terminated(&self) -> bool
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impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture, Fut4: FusedFuture, Fut5: FusedFuture> FusedFuture for Join5<Fut1, Fut2, Fut3, Fut4, Fut5>
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fn is_terminated(&self) -> bool
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impl<Fut> FusedFuture for NeverError<Fut> where
Map<Fut, OkFn<Never>>: FusedFuture,
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Map<Fut, OkFn<Never>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut> FusedFuture for UnitError<Fut> where
Map<Fut, OkFn<()>>: FusedFuture,
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Map<Fut, OkFn<()>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, E> FusedFuture for ErrInto<Fut, E> where
MapErr<Fut, IntoFn<E>>: FusedFuture,
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MapErr<Fut, IntoFn<E>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, E> FusedFuture for OkInto<Fut, E> where
MapOk<Fut, IntoFn<E>>: FusedFuture,
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MapOk<Fut, IntoFn<E>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for Inspect<Fut, F> where
Map<Fut, InspectFn<F>>: FusedFuture,
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Map<Fut, InspectFn<F>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for InspectErr<Fut, F> where
Inspect<IntoFuture<Fut>, InspectErrFn<F>>: FusedFuture,
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Inspect<IntoFuture<Fut>, InspectErrFn<F>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for InspectOk<Fut, F> where
Inspect<IntoFuture<Fut>, InspectOkFn<F>>: FusedFuture,
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Inspect<IntoFuture<Fut>, InspectOkFn<F>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for Map<Fut, F> where
Map<Fut, F>: FusedFuture,
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Map<Fut, F>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for MapErr<Fut, F> where
Map<IntoFuture<Fut>, MapErrFn<F>>: FusedFuture,
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Map<IntoFuture<Fut>, MapErrFn<F>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for MapOk<Fut, F> where
Map<IntoFuture<Fut>, MapOkFn<F>>: FusedFuture,
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Map<IntoFuture<Fut>, MapOkFn<F>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F> FusedFuture for UnwrapOrElse<Fut, F> where
Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: FusedFuture,
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Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, F, G> FusedFuture for MapOkOrElse<Fut, F, G> where
Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: FusedFuture,
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Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut, T> FusedFuture for MapInto<Fut, T> where
Map<Fut, IntoFn<T>>: FusedFuture,
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Map<Fut, IntoFn<T>>: FusedFuture,
fn is_terminated(&self) -> bool
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impl<Fut: TryFuture + FusedFuture> FusedFuture for IntoFuture<Fut>
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fn is_terminated(&self) -> bool
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impl<Fut: TryFuture> FusedFuture for TryMaybeDone<Fut>
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fn is_terminated(&self) -> bool
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impl<Fut: Future> FusedFuture for MaybeDone<Fut>
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fn is_terminated(&self) -> bool
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impl<Fut: Future> FusedFuture for Fuse<Fut>
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fn is_terminated(&self) -> bool
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impl<St> FusedFuture for Concat<St> where
St: FusedStream,
St::Item: Extend<<St::Item as IntoIterator>::Item> + IntoIterator + Default,
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St: FusedStream,
St::Item: Extend<<St::Item as IntoIterator>::Item> + IntoIterator + Default,
fn is_terminated(&self) -> bool
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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>,
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St: FusedStream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
fn is_terminated(&self) -> bool
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impl<St, C> FusedFuture for Collect<St, C> where
St: FusedStream,
C: Default + Extend<St::Item>,
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St: FusedStream,
C: Default + Extend<St::Item>,
fn is_terminated(&self) -> bool
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impl<St, C> FusedFuture for TryCollect<St, C> where
St: TryStream + FusedStream,
C: Default + Extend<St::Ok>,
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St: TryStream + FusedStream,
C: Default + Extend<St::Ok>,
fn is_terminated(&self) -> bool
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impl<St, Fut, F> FusedFuture for ForEach<St, Fut, F> where
St: FusedStream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
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St: FusedStream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
fn is_terminated(&self) -> bool
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impl<St, Fut, F> FusedFuture for ForEachConcurrent<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
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St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
fn is_terminated(&self) -> bool
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impl<St, Fut, F> FusedFuture for TryForEachConcurrent<St, Fut, F> where
St: TryStream,
F: FnMut(St::Ok) -> Fut,
Fut: Future<Output = Result<(), St::Error>>,
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St: TryStream,
F: FnMut(St::Ok) -> Fut,
Fut: Future<Output = Result<(), St::Error>>,
fn is_terminated(&self) -> bool
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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>,
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St: Stream,
F: FnMut(T, St::Item) -> Fut,
Fut: Future<Output = T>,
fn is_terminated(&self) -> bool
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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>,
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St: TryStream,
F: FnMut(T, St::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = St::Error>,
fn is_terminated(&self) -> bool
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impl<St, Si> FusedFuture for Forward<St, Si> where
Forward<St, Si, St::Ok>: FusedFuture,
St: TryStream,
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Forward<St, Si, St::Ok>: FusedFuture,
St: TryStream,