# Trait futures_util::future::FusedFuture [−] [src]

    pub trait FusedFuture: Future {
        pub 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 `poll`ed again.

## Required methods

### `pub fn is_terminated(&self) -> bool` [src]

Returns `true` if the underlying future should no longer be polled.

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## Implementations on Foreign Types

### `impl<P> FusedFuture for Pin<P> where
P: DerefMut + Unpin,
<P as Deref>::Target: FusedFuture,` [src]

#### `pub fn is_terminated(&self) -> bool` [src]

### `impl<F> FusedFuture for AssertUnwindSafe<F> where
F: FusedFuture,` [src]

#### `pub fn is_terminated(&self) -> bool` [src]

### `impl<'_, F> FusedFuture for &'_ mut F where
F: FusedFuture + Unpin + ?Sized,` [src]

#### `pub fn is_terminated(&self) -> bool` [src]

### `impl<F> FusedFuture for Box<F, Global> where
F: FusedFuture + Unpin + ?Sized,` [src]

#### `pub fn is_terminated(&self) -> bool` [src]

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## Implementors

### `impl<A, B> FusedFuture for Either<A, B> where
A: FusedFuture,
B: FusedFuture<Output = A::Output>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<A, B> FusedFuture for Select<A, B> where
A: Future + Unpin,
B: Future + Unpin,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<F> FusedFuture for Flatten<F> where
Flatten<F, <F as Future>::Output>: FusedFuture,
F: Future,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<F, R> FusedFuture for Lazy<F> where
F: FnOnce(&mut Context<'_>) -> R,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<F: FusedFuture> FusedFuture for OptionFuture<F>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1, Fut2> FusedFuture for TryFlatten<Fut1, Fut2> where
TryFlatten<Fut1, Fut2>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1, Fut2, F> FusedFuture for AndThen<Fut1, Fut2, F> where
TryFlatten<MapOk<Fut1, F>, Fut2>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1, Fut2, F> FusedFuture for OrElse<Fut1, Fut2, F> where
TryFlattenErr<MapErr<Fut1, F>, Fut2>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1, Fut2, F> FusedFuture for Then<Fut1, Fut2, F> where
Flatten<Map<Fut1, F>, Fut2>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1: FusedFuture, Fut2: FusedFuture> FusedFuture for Join<Fut1, Fut2>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture> FusedFuture for Join3<Fut1, Fut2, Fut3>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture, Fut4: FusedFuture> FusedFuture for Join4<Fut1, Fut2, Fut3, Fut4>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut1: FusedFuture, Fut2: FusedFuture, Fut3: FusedFuture, Fut4: FusedFuture, Fut5: FusedFuture> FusedFuture for Join5<Fut1, Fut2, Fut3, Fut4, Fut5>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut> FusedFuture for NeverError<Fut> where
Map<Fut, OkFn<Never>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut> FusedFuture for UnitError<Fut> where
Map<Fut, OkFn<()>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, E> FusedFuture for ErrInto<Fut, E> where
MapErr<Fut, IntoFn<E>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, E> FusedFuture for OkInto<Fut, E> where
MapOk<Fut, IntoFn<E>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for Inspect<Fut, F> where
Map<Fut, InspectFn<F>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for InspectErr<Fut, F> where
Inspect<IntoFuture<Fut>, InspectErrFn<F>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for InspectOk<Fut, F> where
Inspect<IntoFuture<Fut>, InspectOkFn<F>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for Map<Fut, F> where
Map<Fut, F>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for MapErr<Fut, F> where
Map<IntoFuture<Fut>, MapErrFn<F>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for MapOk<Fut, F> where
Map<IntoFuture<Fut>, MapOkFn<F>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F> FusedFuture for UnwrapOrElse<Fut, F> where
Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, F, G> FusedFuture for MapOkOrElse<Fut, F, G> where
Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut, T> FusedFuture for MapInto<Fut, T> where
Map<Fut, IntoFn<T>>: FusedFuture,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut: TryFuture + FusedFuture> FusedFuture for IntoFuture<Fut>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut: TryFuture> FusedFuture for TryMaybeDone<Fut>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut: Future> FusedFuture for MaybeDone<Fut>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<Fut: Future> FusedFuture for Fuse<Fut>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St> FusedFuture for Concat<St> where
St: FusedStream,
St::Item: Extend<<St::Item as IntoIterator>::Item> + IntoIterator + Default,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `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>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St, C> FusedFuture for Collect<St, C> where
St: FusedStream,
C: Default + Extend<St::Item>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St, C> FusedFuture for TryCollect<St, C> where
St: TryStream + FusedStream,
C: Default + Extend<St::Ok>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St, Fut, F> FusedFuture for ForEach<St, Fut, F> where
St: FusedStream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `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>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `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>,` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St: Stream + Unpin> FusedFuture for StreamFuture<St>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St: Stream> FusedFuture for Peek<'_, St>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St: ?Sized + FusedStream + Unpin> FusedFuture for Next<'_, St>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St: ?Sized + FusedStream + Unpin> FusedFuture for SelectNextSome<'_, St>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<St: ?Sized + TryStream + Unpin + FusedStream> FusedFuture for TryNext<'_, St>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<T> FusedFuture for Pending<T>` [src]

#### `fn is_terminated(&self) -> bool` [src]

### `impl<T> FusedFuture for Ready<T>` [src]

#### `fn is_terminated(&self) -> bool` [src]

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