Trait futures::prelude::future::Future 1.36.0[−][src]
A future represents an asynchronous computation.
A future is a value that may not have finished computing yet. This kind of “asynchronous value” makes it possible for a thread to continue doing useful work while it waits for the value to become available.
The poll
method
The core method of future, poll
, attempts to resolve the future into a
final value. This method does not block if the value is not ready. Instead,
the current task is scheduled to be woken up when it’s possible to make
further progress by poll
ing again. The context
passed to the poll
method can provide a Waker
, which is a handle for waking up the current
task.
When using a future, you generally won’t call poll
directly, but instead
.await
the value.
Associated Types
Required methods
pub fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>
[src][−]
Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.
Return value
This function returns:
Poll::Pending
if the future is not ready yetPoll::Ready(val)
with the resultval
of this future if it finished successfully.
Once a future has finished, clients should not poll
it again.
When a future is not ready yet, poll
returns Poll::Pending
and
stores a clone of the Waker
copied from the current Context
.
This Waker
is then woken once the future can make progress.
For example, a future waiting for a socket to become
readable would call .clone()
on the Waker
and store it.
When a signal arrives elsewhere indicating that the socket is readable,
Waker::wake
is called and the socket future’s task is awoken.
Once a task has been woken up, it should attempt to poll
the future
again, which may or may not produce a final value.
Note that on multiple calls to poll
, only the Waker
from the
Context
passed to the most recent call should be scheduled to
receive a wakeup.
Runtime characteristics
Futures alone are inert; they must be actively poll
ed to make
progress, meaning that each time the current task is woken up, it should
actively re-poll
pending futures that it still has an interest in.
The poll
function is not called repeatedly in a tight loop – instead,
it should only be called when the future indicates that it is ready to
make progress (by calling wake()
). If you’re familiar with the
poll(2)
or select(2)
syscalls on Unix it’s worth noting that futures
typically do not suffer the same problems of “all wakeups must poll
all events”; they are more like epoll(4)
.
An implementation of poll
should strive to return quickly, and should
not block. Returning quickly prevents unnecessarily clogging up
threads or event loops. If it is known ahead of time that a call to
poll
may end up taking awhile, the work should be offloaded to a
thread pool (or something similar) to ensure that poll
can return
quickly.
Panics
Once a future has completed (returned Ready
from poll
), calling its
poll
method again may panic, block forever, or cause other kinds of
problems; the Future
trait places no requirements on the effects of
such a call. However, as the poll
method is not marked unsafe
,
Rust’s usual rules apply: calls must never cause undefined behavior
(memory corruption, incorrect use of unsafe
functions, or the like),
regardless of the future’s state.
Trait Implementations
impl<'a, T> UnsafeFutureObj<'a, T> for &'a mut (dyn Future<Output = T> + 'a + Unpin)
[src][+]
Implementations on Foreign Types
impl<F> Future for AssertUnwindSafe<F> where
F: Future,
[src][−]
F: Future,
type Output = <F as Future>::Output
pub fn poll(
self: Pin<&mut AssertUnwindSafe<F>>,
cx: &mut Context<'_>
) -> Poll<<AssertUnwindSafe<F> as Future>::Output>
[src]
self: Pin<&mut AssertUnwindSafe<F>>,
cx: &mut Context<'_>
) -> Poll<<AssertUnwindSafe<F> as Future>::Output>
impl<T> Future for Ready<T>
[src][−]
impl<T, F> Future for PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,
[src][−]
F: FnMut(&mut Context<'_>) -> Poll<T>,
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
[src][−]
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output
pub fn poll(
self: Pin<&mut &'_ mut F>,
cx: &mut Context<'_>
) -> Poll<<&'_ mut F as Future>::Output>
[src]
self: Pin<&mut &'_ mut F>,
cx: &mut Context<'_>
) -> Poll<<&'_ mut F as Future>::Output>
impl<T> Future for Pending<T>
[src][−]
impl<P> Future for Pin<P> where
P: Unpin + DerefMut,
<P as Deref>::Target: Future,
[src][−]
P: Unpin + DerefMut,
<P as Deref>::Target: Future,
type Output = <<P as Deref>::Target as Future>::Output
pub fn poll(
self: Pin<&mut Pin<P>>,
cx: &mut Context<'_>
) -> Poll<<Pin<P> as Future>::Output>
[src]
self: Pin<&mut Pin<P>>,
cx: &mut Context<'_>
) -> Poll<<Pin<P> as Future>::Output>
impl<F, A> Future for Box<F, A> where
F: Unpin + Future + ?Sized,
A: Allocator + 'static,
[src][−]
F: Unpin + Future + ?Sized,
A: Allocator + 'static,
type Output = <F as Future>::Output
pub fn poll(
self: Pin<&mut Box<F, A>>,
cx: &mut Context<'_>
) -> Poll<<Box<F, A> as Future>::Output>
[src]
self: Pin<&mut Box<F, A>>,
cx: &mut Context<'_>
) -> Poll<<Box<F, A> as Future>::Output>
Implementors
impl<'_, A> Future for ReadToEnd<'_, A> where
A: AsyncRead + Unpin + ?Sized,
[src][+]
A: AsyncRead + Unpin + ?Sized,
impl<'_, A> Future for ReadToString<'_, A> where
A: AsyncRead + Unpin + ?Sized,
[src][+]
A: AsyncRead + Unpin + ?Sized,
impl<'_, R> Future for Read<'_, R> where
R: Unpin + AsyncRead + ?Sized,
[src][+]
R: Unpin + AsyncRead + ?Sized,
impl<'_, R> Future for ReadExact<'_, R> where
R: Unpin + AsyncRead + ?Sized,
[src][+]
R: Unpin + AsyncRead + ?Sized,
impl<'_, R> Future for ReadLine<'_, R> where
R: Unpin + AsyncBufRead + ?Sized,
[src][+]
R: Unpin + AsyncBufRead + ?Sized,
impl<'_, R> Future for ReadUntil<'_, R> where
R: Unpin + AsyncBufRead + ?Sized,
[src][+]
R: Unpin + AsyncBufRead + ?Sized,
impl<'_, R> Future for ReadVectored<'_, R> where
R: Unpin + AsyncRead + ?Sized,
[src][+]
R: Unpin + AsyncRead + ?Sized,
impl<'_, R, W> Future for Copy<'_, R, W> where
R: AsyncRead,
W: Unpin + AsyncWrite + ?Sized,
[src][+]
R: AsyncRead,
W: Unpin + AsyncWrite + ?Sized,
impl<'_, R, W> Future for CopyBuf<'_, R, W> where
R: AsyncBufRead,
W: AsyncWrite + Unpin + ?Sized,
[src][+]
R: AsyncBufRead,
W: AsyncWrite + Unpin + ?Sized,
impl<'_, S> Future for Seek<'_, S> where
S: Unpin + AsyncSeek + ?Sized,
[src][+]
S: Unpin + AsyncSeek + ?Sized,
impl<'_, Si, Item> Future for futures::sink::Close<'_, Si, Item> where
Si: Unpin + Sink<Item> + ?Sized,
[src][+]
Si: Unpin + Sink<Item> + ?Sized,
impl<'_, Si, Item> Future for Feed<'_, Si, Item> where
Si: Unpin + Sink<Item> + ?Sized,
[src][+]
Si: Unpin + Sink<Item> + ?Sized,
impl<'_, Si, Item> Future for futures::sink::Flush<'_, Si, Item> where
Si: Unpin + Sink<Item> + ?Sized,
[src][+]
Si: Unpin + Sink<Item> + ?Sized,
impl<'_, Si, Item> Future for Send<'_, Si, Item> where
Si: Unpin + Sink<Item> + ?Sized,
[src][+]
Si: Unpin + Sink<Item> + ?Sized,
impl<'_, Si, St, Ok, Error> Future for SendAll<'_, Si, St> where
Si: Sink<Ok, Error = Error> + Unpin + ?Sized,
St: Stream<Item = Result<Ok, Error>> + Unpin + ?Sized,
[src][+]
Si: Sink<Ok, Error = Error> + Unpin + ?Sized,
St: Stream<Item = Result<Ok, Error>> + Unpin + ?Sized,
impl<'_, St> Future for Next<'_, St> where
St: Unpin + Stream + ?Sized,
[src][+]
St: Unpin + Stream + ?Sized,
impl<'_, St> Future for SelectNextSome<'_, St> where
St: Unpin + FusedStream + ?Sized,
[src][+]
St: Unpin + FusedStream + ?Sized,
impl<'_, St> Future for TryNext<'_, St> where
St: Unpin + TryStream + ?Sized,
[src][+]
St: Unpin + TryStream + ?Sized,
impl<'_, T> Future for Cancellation<'_, T>
[src][+]
impl<'_, T> Future for FutureObj<'_, T>
[src][+]
impl<'_, T> Future for LocalFutureObj<'_, T>
[src][+]
impl<'_, W> Future for futures::io::Close<'_, W> where
W: Unpin + AsyncWrite + ?Sized,
[src][+]
W: Unpin + AsyncWrite + ?Sized,
impl<'_, W> Future for futures::io::Flush<'_, W> where
W: AsyncWrite + Unpin + ?Sized,
[src][+]
W: AsyncWrite + Unpin + ?Sized,
impl<'_, W> Future for Write<'_, W> where
W: Unpin + AsyncWrite + ?Sized,
[src][+]
W: Unpin + AsyncWrite + ?Sized,
impl<'_, W> Future for WriteAll<'_, W> where
W: Unpin + AsyncWrite + ?Sized,
[src][+]
W: Unpin + AsyncWrite + ?Sized,
impl<'_, W> Future for WriteVectored<'_, W> where
W: Unpin + AsyncWrite + ?Sized,
[src][+]
W: Unpin + AsyncWrite + ?Sized,
impl<'a, R> Future for FillBuf<'a, R> where
R: AsyncBufRead + Unpin + ?Sized,
[src][+]
R: AsyncBufRead + Unpin + ?Sized,
impl<'a, St> Future for Peek<'a, St> where
St: Stream,
[src][+]
St: Stream,
impl<'a, T> Future for MutexLockFuture<'a, T> where
T: ?Sized,
[src][+]
T: ?Sized,
impl<A, B> Future for Either<A, B> where
B: Future<Output = <A as Future>::Output>,
A: Future,
[src][+]
B: Future<Output = <A as Future>::Output>,
A: Future,
impl<A, B> Future for Select<A, B> where
B: Future + Unpin,
A: Future + Unpin,
[src][+]
B: Future + Unpin,
A: Future + Unpin,
impl<A, B> Future for TrySelect<A, B> where
B: Unpin + TryFuture,
A: Unpin + TryFuture,
[src][+]
B: Unpin + TryFuture,
A: Unpin + TryFuture,
impl<F> Future for Flatten<F> where
F: Future,
Flatten<F, <F as Future>::Output>: Future,
[src][+]
F: Future,
Flatten<F, <F as Future>::Output>: Future,
impl<F> Future for JoinAll<F> where
F: Future,
[src][+]
F: Future,
impl<F> Future for OptionFuture<F> where
F: Future,
[src][+]
F: Future,
impl<F> Future for TryJoinAll<F> where
F: TryFuture,
[src][+]
F: TryFuture,
impl<F, R> Future for Lazy<F> where
F: FnOnce(&mut Context<'_>) -> R,
[src][+]
F: FnOnce(&mut Context<'_>) -> R,
impl<Fut1, Fut2> Future for Join<Fut1, Fut2> where
Fut1: Future,
Fut2: Future,
[src][+]
Fut1: Future,
Fut2: Future,
impl<Fut1, Fut2> Future for TryFlatten<Fut1, Fut2> where
TryFlatten<Fut1, Fut2>: Future,
[src][+]
TryFlatten<Fut1, Fut2>: Future,
impl<Fut1, Fut2> Future for TryJoin<Fut1, Fut2> where
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
[src][+]
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
impl<Fut1, Fut2, F> Future for AndThen<Fut1, Fut2, F> where
TryFlatten<MapOk<Fut1, F>, Fut2>: Future,
[src][+]
TryFlatten<MapOk<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, F> Future for OrElse<Fut1, Fut2, F> where
TryFlattenErr<MapErr<Fut1, F>, Fut2>: Future,
[src][+]
TryFlattenErr<MapErr<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, F> Future for Then<Fut1, Fut2, F> where
Flatten<Map<Fut1, F>, Fut2>: Future,
[src][+]
Flatten<Map<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, Fut3> Future for Join3<Fut1, Fut2, Fut3> where
Fut1: Future,
Fut2: Future,
Fut3: Future,
[src][+]
Fut1: Future,
Fut2: Future,
Fut3: Future,
impl<Fut1, Fut2, Fut3> Future for TryJoin3<Fut1, Fut2, Fut3> where
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut3: TryFuture<Error = <Fut1 as TryFuture>::Error>,
[src][+]
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut3: TryFuture<Error = <Fut1 as TryFuture>::Error>,
impl<Fut1, Fut2, Fut3, Fut4> Future for Join4<Fut1, Fut2, Fut3, Fut4> where
Fut1: Future,
Fut2: Future,
Fut3: Future,
Fut4: Future,
[src][+]
Fut1: Future,
Fut2: Future,
Fut3: Future,
Fut4: Future,
impl<Fut1, Fut2, Fut3, Fut4> Future for TryJoin4<Fut1, Fut2, Fut3, Fut4> where
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut3: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut4: TryFuture<Error = <Fut1 as TryFuture>::Error>,
[src][+]
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut3: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut4: TryFuture<Error = <Fut1 as TryFuture>::Error>,
impl<Fut1, Fut2, Fut3, Fut4, Fut5> Future for Join5<Fut1, Fut2, Fut3, Fut4, Fut5> where
Fut1: Future,
Fut2: Future,
Fut3: Future,
Fut4: Future,
Fut5: Future,
[src][+]
Fut1: Future,
Fut2: Future,
Fut3: Future,
Fut4: Future,
Fut5: Future,
impl<Fut1, Fut2, Fut3, Fut4, Fut5> Future for TryJoin5<Fut1, Fut2, Fut3, Fut4, Fut5> where
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut3: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut4: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut5: TryFuture<Error = <Fut1 as TryFuture>::Error>,
[src][+]
Fut1: TryFuture,
Fut2: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut3: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut4: TryFuture<Error = <Fut1 as TryFuture>::Error>,
Fut5: TryFuture<Error = <Fut1 as TryFuture>::Error>,
impl<Fut> Future for MaybeDone<Fut> where
Fut: Future,
[src][+]
Fut: Future,
impl<Fut> Future for TryMaybeDone<Fut> where
Fut: TryFuture,
[src][+]
Fut: TryFuture,
impl<Fut> Future for Abortable<Fut> where
Fut: Future,
[src][+]
Fut: Future,
impl<Fut> Future for CatchUnwind<Fut> where
Fut: Future + UnwindSafe,
[src][+]
Fut: Future + UnwindSafe,
impl<Fut> Future for Fuse<Fut> where
Fut: Future,
[src][+]
Fut: Future,
impl<Fut> Future for IntoFuture<Fut> where
Fut: TryFuture,
[src][+]
Fut: TryFuture,
impl<Fut> Future for NeverError<Fut> where
Map<Fut, OkFn<Infallible>>: Future,
[src][+]
Map<Fut, OkFn<Infallible>>: Future,
impl<Fut> Future for Remote<Fut> where
Fut: Future,
[src][+]
Fut: Future,
impl<Fut> Future for SelectAll<Fut> where
Fut: Unpin + Future,
[src][+]
Fut: Unpin + Future,
impl<Fut> Future for SelectOk<Fut> where
Fut: Unpin + TryFuture,
[src][+]
Fut: Unpin + TryFuture,
impl<Fut> Future for Shared<Fut> where
Fut: Future,
<Fut as Future>::Output: Clone,
[src][+]
Fut: Future,
<Fut as Future>::Output: Clone,
impl<Fut> Future for UnitError<Fut> where
Map<Fut, OkFn<()>>: Future,
[src][+]
Map<Fut, OkFn<()>>: Future,
impl<Fut, E> Future for ErrInto<Fut, E> where
MapErr<Fut, IntoFn<E>>: Future,
[src][+]
MapErr<Fut, IntoFn<E>>: Future,
impl<Fut, E> Future for OkInto<Fut, E> where
MapOk<Fut, IntoFn<E>>: Future,
[src][+]
MapOk<Fut, IntoFn<E>>: Future,
impl<Fut, F> Future for Inspect<Fut, F> where
Map<Fut, InspectFn<F>>: Future,
[src][+]
Map<Fut, InspectFn<F>>: Future,
impl<Fut, F> Future for InspectErr<Fut, F> where
Inspect<IntoFuture<Fut>, InspectErrFn<F>>: Future,
[src][+]
Inspect<IntoFuture<Fut>, InspectErrFn<F>>: Future,
impl<Fut, F> Future for InspectOk<Fut, F> where
Inspect<IntoFuture<Fut>, InspectOkFn<F>>: Future,
[src][+]
Inspect<IntoFuture<Fut>, InspectOkFn<F>>: Future,
impl<Fut, F> Future for Map<Fut, F> where
Map<Fut, F>: Future,
[src][+]
Map<Fut, F>: Future,
impl<Fut, F> Future for MapErr<Fut, F> where
Map<IntoFuture<Fut>, MapErrFn<F>>: Future,
[src][+]
Map<IntoFuture<Fut>, MapErrFn<F>>: Future,
impl<Fut, F> Future for MapOk<Fut, F> where
Map<IntoFuture<Fut>, MapOkFn<F>>: Future,
[src][+]
Map<IntoFuture<Fut>, MapOkFn<F>>: Future,
impl<Fut, F> Future for UnwrapOrElse<Fut, F> where
Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: Future,
[src][+]
Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: Future,
impl<Fut, F, G> Future for MapOkOrElse<Fut, F, G> where
Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: Future,
[src][+]
Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: Future,
impl<Fut, T> Future for MapInto<Fut, T> where
Map<Fut, IntoFn<T>>: Future,
[src][+]
Map<Fut, IntoFn<T>>: Future,
impl<St> Future for Concat<St> where
St: Stream,
<St as Stream>::Item: Extend<<<St as Stream>::Item as IntoIterator>::Item>,
<St as Stream>::Item: IntoIterator,
<St as Stream>::Item: Default,
[src][+]
St: Stream,
<St as Stream>::Item: Extend<<<St as Stream>::Item as IntoIterator>::Item>,
<St as Stream>::Item: IntoIterator,
<St as Stream>::Item: Default,
impl<St> Future for StreamFuture<St> where
St: Unpin + Stream,
[src][+]
St: Unpin + Stream,
impl<St> Future for TryConcat<St> where
St: TryStream,
<St as TryStream>::Ok: Extend<<<St as TryStream>::Ok as IntoIterator>::Item>,
<St as TryStream>::Ok: IntoIterator,
<St as TryStream>::Ok: Default,
[src][+]
St: TryStream,
<St as TryStream>::Ok: Extend<<<St as TryStream>::Ok as IntoIterator>::Item>,
<St as TryStream>::Ok: IntoIterator,
<St as TryStream>::Ok: Default,
impl<St, A, B, FromA, FromB> Future for Unzip<St, FromA, FromB> where
St: Stream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
[src][+]
St: Stream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
impl<St, C> Future for Collect<St, C> where
C: Default + Extend<<St as Stream>::Item>,
St: Stream,
[src][+]
C: Default + Extend<<St as Stream>::Item>,
St: Stream,
impl<St, C> Future for TryCollect<St, C> where
C: Default + Extend<<St as TryStream>::Ok>,
St: TryStream,
[src][+]
C: Default + Extend<<St as TryStream>::Ok>,
St: TryStream,
impl<St, Fut, F> Future for ForEach<St, Fut, F> where
F: FnMut(<St as Stream>::Item) -> Fut,
Fut: Future<Output = ()>,
St: Stream,
[src][+]
F: FnMut(<St as Stream>::Item) -> Fut,
Fut: Future<Output = ()>,
St: Stream,
impl<St, Fut, F> Future for ForEachConcurrent<St, Fut, F> where
F: FnMut(<St as Stream>::Item) -> Fut,
Fut: Future<Output = ()>,
St: Stream,
[src][+]
F: FnMut(<St as Stream>::Item) -> Fut,
Fut: Future<Output = ()>,
St: Stream,
impl<St, Fut, F> Future for TryForEach<St, Fut, F> where
F: FnMut(<St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = <St as TryStream>::Error>,
St: TryStream,
[src][+]
F: FnMut(<St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = <St as TryStream>::Error>,
St: TryStream,
impl<St, Fut, F> Future for TryForEachConcurrent<St, Fut, F> where
F: FnMut(<St as TryStream>::Ok) -> Fut,
Fut: Future<Output = Result<(), <St as TryStream>::Error>>,
St: TryStream,
[src][+]
F: FnMut(<St as TryStream>::Ok) -> Fut,
Fut: Future<Output = Result<(), <St as TryStream>::Error>>,
St: TryStream,
impl<St, Fut, T, F> Future for Fold<St, Fut, T, F> where
F: FnMut(T, <St as Stream>::Item) -> Fut,
Fut: Future<Output = T>,
St: Stream,
[src][+]
F: FnMut(T, <St as Stream>::Item) -> Fut,
Fut: Future<Output = T>,
St: Stream,
impl<St, Fut, T, F> Future for TryFold<St, Fut, T, F> where
F: FnMut(T, <St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = <St as TryStream>::Error>,
St: TryStream,
[src][+]
F: FnMut(T, <St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = <St as TryStream>::Error>,
St: TryStream,
impl<St, Si> Future for Forward<St, Si> where
St: TryStream,
Forward<St, Si, <St as TryStream>::Ok>: Future,
[src][+]
St: TryStream,
Forward<St, Si, <St as TryStream>::Ok>: Future,
impl<T> Future for Receiver<T>
[src][+]
impl<T> Future for futures::future::Pending<T>
[src][+]
impl<T> Future for futures::future::Ready<T>
[src][+]
impl<T> Future for RemoteHandle<T> where
T: 'static,
[src][+]
T: 'static,
impl<T, F> Future for futures::future::PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,
[src][+]
F: FnMut(&mut Context<'_>) -> Poll<T>,
impl<T, E> Future for Promise<T, E>
impl<T, E> Future for Promise<T, E>
impl<VatId> Future for Disconnector<VatId> where
VatId: 'static,
impl<VatId> Future for Disconnector<VatId> where
VatId: 'static,
impl<VatId> Future for RpcSystem<VatId> where
VatId: 'static,
impl<VatId> Future for RpcSystem<VatId> where
VatId: 'static,
impl<T> Future for Cancellation<'_, T>
impl<T> Future for Cancellation<'_, T>
impl<T> Future for Receiver<T>
impl<T> Future for Receiver<T>
impl<T> Future for LocalFutureObj<'_, T>
impl<T> Future for LocalFutureObj<'_, T>
impl<T> Future for FutureObj<'_, T>
impl<T> Future for FutureObj<'_, T>
impl<Fut: Future> Future for Fuse<Fut>
impl<Fut: Future> Future for Fuse<Fut>
impl<F> Future for Flatten<F> where
Flatten<F, <F as Future>::Output>: Future,
F: Future,
impl<F> Future for Flatten<F> where
Flatten<F, <F as Future>::Output>: Future,
F: Future,
impl<Fut, F> Future for Map<Fut, F> where
Map<Fut, F>: Future,
impl<Fut, F> Future for Map<Fut, F> where
Map<Fut, F>: Future,
impl<Fut, T> Future for MapInto<Fut, T> where
Map<Fut, IntoFn<T>>: Future,
impl<Fut, T> Future for MapInto<Fut, T> where
Map<Fut, IntoFn<T>>: Future,
impl<Fut1, Fut2, F> Future for Then<Fut1, Fut2, F> where
Flatten<Map<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, F> Future for Then<Fut1, Fut2, F> where
Flatten<Map<Fut1, F>, Fut2>: Future,
impl<Fut, F> Future for Inspect<Fut, F> where
Map<Fut, InspectFn<F>>: Future,
impl<Fut, F> Future for Inspect<Fut, F> where
Map<Fut, InspectFn<F>>: Future,
impl<Fut> Future for NeverError<Fut> where
Map<Fut, OkFn<Never>>: Future,
impl<Fut> Future for NeverError<Fut> where
Map<Fut, OkFn<Never>>: Future,
impl<Fut> Future for UnitError<Fut> where
Map<Fut, OkFn<()>>: Future,
impl<Fut> Future for UnitError<Fut> where
Map<Fut, OkFn<()>>: Future,
impl<Fut> Future for CatchUnwind<Fut> where
Fut: Future + UnwindSafe,
impl<Fut> Future for CatchUnwind<Fut> where
Fut: Future + UnwindSafe,
impl<T: 'static> Future for RemoteHandle<T>
impl<T: 'static> Future for RemoteHandle<T>
impl<Fut: Future> Future for Remote<Fut>
impl<Fut: Future> Future for Remote<Fut>
impl<Fut> Future for Shared<Fut> where
Fut: Future,
Fut::Output: Clone,
impl<Fut> Future for Shared<Fut> where
Fut: Future,
Fut::Output: Clone,
impl<Fut: TryFuture> Future for IntoFuture<Fut>
impl<Fut: TryFuture> Future for IntoFuture<Fut>
impl<Fut1, Fut2> Future for TryFlatten<Fut1, Fut2> where
TryFlatten<Fut1, Fut2>: Future,
impl<Fut1, Fut2> Future for TryFlatten<Fut1, Fut2> where
TryFlatten<Fut1, Fut2>: Future,
impl<Fut1, Fut2, F> Future for AndThen<Fut1, Fut2, F> where
TryFlatten<MapOk<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, F> Future for AndThen<Fut1, Fut2, F> where
TryFlatten<MapOk<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, F> Future for OrElse<Fut1, Fut2, F> where
TryFlattenErr<MapErr<Fut1, F>, Fut2>: Future,
impl<Fut1, Fut2, F> Future for OrElse<Fut1, Fut2, F> where
TryFlattenErr<MapErr<Fut1, F>, Fut2>: Future,
impl<Fut, E> Future for ErrInto<Fut, E> where
MapErr<Fut, IntoFn<E>>: Future,
impl<Fut, E> Future for ErrInto<Fut, E> where
MapErr<Fut, IntoFn<E>>: Future,
impl<Fut, E> Future for OkInto<Fut, E> where
MapOk<Fut, IntoFn<E>>: Future,
impl<Fut, E> Future for OkInto<Fut, E> where
MapOk<Fut, IntoFn<E>>: Future,
impl<Fut, F> Future for InspectOk<Fut, F> where
Inspect<IntoFuture<Fut>, InspectOkFn<F>>: Future,
impl<Fut, F> Future for InspectOk<Fut, F> where
Inspect<IntoFuture<Fut>, InspectOkFn<F>>: Future,
impl<Fut, F> Future for InspectErr<Fut, F> where
Inspect<IntoFuture<Fut>, InspectErrFn<F>>: Future,
impl<Fut, F> Future for InspectErr<Fut, F> where
Inspect<IntoFuture<Fut>, InspectErrFn<F>>: Future,
impl<Fut, F> Future for MapOk<Fut, F> where
Map<IntoFuture<Fut>, MapOkFn<F>>: Future,
impl<Fut, F> Future for MapOk<Fut, F> where
Map<IntoFuture<Fut>, MapOkFn<F>>: Future,
impl<Fut, F> Future for MapErr<Fut, F> where
Map<IntoFuture<Fut>, MapErrFn<F>>: Future,
impl<Fut, F> Future for MapErr<Fut, F> where
Map<IntoFuture<Fut>, MapErrFn<F>>: Future,
impl<Fut, F, G> Future for MapOkOrElse<Fut, F, G> where
Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: Future,
impl<Fut, F, G> Future for MapOkOrElse<Fut, F, G> where
Map<IntoFuture<Fut>, ChainFn<MapOkFn<F>, ChainFn<MapErrFn<G>, MergeResultFn>>>: Future,
impl<Fut, F> Future for UnwrapOrElse<Fut, F> where
Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: Future,
impl<Fut, F> Future for UnwrapOrElse<Fut, F> where
Map<IntoFuture<Fut>, UnwrapOrElseFn<F>>: Future,
impl<F, R> Future for Lazy<F> where
F: FnOnce(&mut Context<'_>) -> R,
impl<F, R> Future for Lazy<F> where
F: FnOnce(&mut Context<'_>) -> R,
impl<T> Future for Pending<T>
impl<T> Future for Pending<T>
impl<Fut: Future> Future for MaybeDone<Fut>
impl<Fut: Future> Future for MaybeDone<Fut>
impl<Fut: TryFuture> Future for TryMaybeDone<Fut>
impl<Fut: TryFuture> Future for TryMaybeDone<Fut>
impl<F: Future> Future for OptionFuture<F>
impl<F: Future> Future for OptionFuture<F>
impl<T, F> Future for PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,
impl<T, F> Future for PollFn<F> where
F: FnMut(&mut Context<'_>) -> Poll<T>,
impl<T> Future for Ready<T>
impl<T> Future for Ready<T>
impl<Fut1: Future, Fut2: Future> Future for Join<Fut1, Fut2>
impl<Fut1: Future, Fut2: Future> Future for Join<Fut1, Fut2>
impl<Fut1: Future, Fut2: Future, Fut3: Future> Future for Join3<Fut1, Fut2, Fut3>
impl<Fut1: Future, Fut2: Future, Fut3: Future> Future for Join3<Fut1, Fut2, Fut3>
impl<Fut1: Future, Fut2: Future, Fut3: Future, Fut4: Future> Future for Join4<Fut1, Fut2, Fut3, Fut4>
impl<Fut1: Future, Fut2: Future, Fut3: Future, Fut4: Future> Future for Join4<Fut1, Fut2, Fut3, Fut4>
impl<Fut1: Future, Fut2: Future, Fut3: Future, Fut4: Future, Fut5: Future> Future for Join5<Fut1, Fut2, Fut3, Fut4, Fut5>
impl<Fut1: Future, Fut2: Future, Fut3: Future, Fut4: Future, Fut5: Future> Future for Join5<Fut1, Fut2, Fut3, Fut4, Fut5>
impl<F> Future for JoinAll<F> where
F: Future,
impl<F> Future for JoinAll<F> where
F: Future,
impl<A, B> Future for Select<A, B> where
A: Future + Unpin,
B: Future + Unpin,
impl<A, B> Future for Select<A, B> where
A: Future + Unpin,
B: Future + Unpin,
impl<Fut: Future + Unpin> Future for SelectAll<Fut>
impl<Fut: Future + Unpin> Future for SelectAll<Fut>
impl<Fut1, Fut2> Future for TryJoin<Fut1, Fut2> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2> Future for TryJoin<Fut1, Fut2> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2, Fut3> Future for TryJoin3<Fut1, Fut2, Fut3> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
Fut3: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2, Fut3> Future for TryJoin3<Fut1, Fut2, Fut3> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
Fut3: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2, Fut3, Fut4> Future for TryJoin4<Fut1, Fut2, Fut3, Fut4> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
Fut3: TryFuture<Error = Fut1::Error>,
Fut4: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2, Fut3, Fut4> Future for TryJoin4<Fut1, Fut2, Fut3, Fut4> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
Fut3: TryFuture<Error = Fut1::Error>,
Fut4: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2, Fut3, Fut4, Fut5> Future for TryJoin5<Fut1, Fut2, Fut3, Fut4, Fut5> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
Fut3: TryFuture<Error = Fut1::Error>,
Fut4: TryFuture<Error = Fut1::Error>,
Fut5: TryFuture<Error = Fut1::Error>,
impl<Fut1, Fut2, Fut3, Fut4, Fut5> Future for TryJoin5<Fut1, Fut2, Fut3, Fut4, Fut5> where
Fut1: TryFuture,
Fut2: TryFuture<Error = Fut1::Error>,
Fut3: TryFuture<Error = Fut1::Error>,
Fut4: TryFuture<Error = Fut1::Error>,
Fut5: TryFuture<Error = Fut1::Error>,
impl<F> Future for TryJoinAll<F> where
F: TryFuture,
impl<F> Future for TryJoinAll<F> where
F: TryFuture,
impl<A: Unpin, B: Unpin> Future for TrySelect<A, B> where
A: TryFuture,
B: TryFuture,
impl<A: Unpin, B: Unpin> Future for TrySelect<A, B> where
A: TryFuture,
B: TryFuture,
impl<Fut: TryFuture + Unpin> Future for SelectOk<Fut>
impl<Fut: TryFuture + Unpin> Future for SelectOk<Fut>
impl<A, B> Future for Either<A, B> where
A: Future,
B: Future<Output = A::Output>,
impl<A, B> Future for Either<A, B> where
A: Future,
B: Future<Output = A::Output>,
impl<Fut> Future for Abortable<Fut> where
Fut: Future,
impl<Fut> Future for Abortable<Fut> where
Fut: Future,
impl<St, C> Future for Collect<St, C> where
St: Stream,
C: Default + Extend<St::Item>,
impl<St, C> Future for Collect<St, C> where
St: Stream,
C: Default + Extend<St::Item>,
impl<St, A, B, FromA, FromB> Future for Unzip<St, FromA, FromB> where
St: Stream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
impl<St, A, B, FromA, FromB> Future for Unzip<St, FromA, FromB> where
St: Stream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
impl<St> Future for Concat<St> where
St: Stream,
St::Item: Extend<<St::Item as IntoIterator>::Item> + IntoIterator + Default,
impl<St> Future for Concat<St> where
St: Stream,
St::Item: Extend<<St::Item as IntoIterator>::Item> + IntoIterator + Default,
impl<St, Fut, T, F> Future for Fold<St, Fut, T, F> where
St: Stream,
F: FnMut(T, St::Item) -> Fut,
Fut: Future<Output = T>,
impl<St, Fut, T, F> Future for Fold<St, Fut, T, F> where
St: Stream,
F: FnMut(T, St::Item) -> Fut,
Fut: Future<Output = T>,
impl<St, Si> Future for Forward<St, Si> where
Forward<St, Si, St::Ok>: Future,
St: TryStream,
impl<St, Si> Future for Forward<St, Si> where
Forward<St, Si, St::Ok>: Future,
St: TryStream,
impl<St, Fut, F> Future for ForEach<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
impl<St, Fut, F> Future for ForEach<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
impl<St: Stream + Unpin> Future for StreamFuture<St>
impl<St: Stream + Unpin> Future for StreamFuture<St>
impl<St: ?Sized + Stream + Unpin> Future for Next<'_, St>
impl<St: ?Sized + Stream + Unpin> Future for Next<'_, St>
impl<St: ?Sized + FusedStream + Unpin> Future for SelectNextSome<'_, St>
impl<St: ?Sized + FusedStream + Unpin> Future for SelectNextSome<'_, St>
impl<'a, St> Future for Peek<'a, St> where
St: Stream,
impl<'a, St> Future for Peek<'a, St> where
St: Stream,
impl<St, Fut, F> Future for ForEachConcurrent<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
impl<St, Fut, F> Future for ForEachConcurrent<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future<Output = ()>,
impl<St: ?Sized + TryStream + Unpin> Future for TryNext<'_, St>
impl<St: ?Sized + TryStream + Unpin> Future for TryNext<'_, St>
impl<St, Fut, F> Future for TryForEach<St, Fut, F> where
St: TryStream,
F: FnMut(St::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = St::Error>,
impl<St, Fut, F> Future for TryForEach<St, Fut, F> where
St: TryStream,
F: FnMut(St::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = St::Error>,
impl<St, C> Future for TryCollect<St, C> where
St: TryStream,
C: Default + Extend<St::Ok>,
impl<St, C> Future for TryCollect<St, C> where
St: TryStream,
C: Default + Extend<St::Ok>,
impl<St> Future for TryConcat<St> where
St: TryStream,
St::Ok: Extend<<St::Ok as IntoIterator>::Item> + IntoIterator + Default,
impl<St> Future for TryConcat<St> where
St: TryStream,
St::Ok: Extend<<St::Ok as IntoIterator>::Item> + IntoIterator + Default,
impl<St, Fut, T, F> Future for TryFold<St, Fut, T, F> where
St: TryStream,
F: FnMut(T, St::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = St::Error>,
impl<St, Fut, T, F> Future for TryFold<St, Fut, T, F> where
St: TryStream,
F: FnMut(T, St::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = St::Error>,
impl<St, Fut, F> Future for TryForEachConcurrent<St, Fut, F> where
St: TryStream,
F: FnMut(St::Ok) -> Fut,
Fut: Future<Output = Result<(), St::Error>>,
impl<St, Fut, F> Future for TryForEachConcurrent<St, Fut, F> where
St: TryStream,
F: FnMut(St::Ok) -> Fut,
Fut: Future<Output = Result<(), St::Error>>,
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Close<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Close<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Feed<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Feed<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Flush<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Flush<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Send<'_, Si, Item>
impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Send<'_, Si, Item>
impl<Si: ?Sized, St: ?Sized, Ok, Error> Future for SendAll<'_, Si, St> where
Si: Sink<Ok, Error = Error> + Unpin,
St: Stream<Item = Result<Ok, Error>> + Unpin,
impl<Si: ?Sized, St: ?Sized, Ok, Error> Future for SendAll<'_, Si, St> where
Si: Sink<Ok, Error = Error> + Unpin,
St: Stream<Item = Result<Ok, Error>> + Unpin,
impl<W: AsyncWrite + ?Sized + Unpin> Future for Close<'_, W>
impl<W: AsyncWrite + ?Sized + Unpin> Future for Close<'_, W>
impl<R: AsyncRead, W: AsyncWrite + Unpin + ?Sized> Future for Copy<'_, R, W>
impl<R: AsyncRead, W: AsyncWrite + Unpin + ?Sized> Future for Copy<'_, R, W>
impl<R, W: ?Sized> Future for CopyBuf<'_, R, W> where
R: AsyncBufRead,
W: AsyncWrite + Unpin,
impl<R, W: ?Sized> Future for CopyBuf<'_, R, W> where
R: AsyncBufRead,
W: AsyncWrite + Unpin,
impl<'a, R: ?Sized> Future for FillBuf<'a, R> where
R: AsyncBufRead + Unpin,
impl<'a, R: ?Sized> Future for FillBuf<'a, R> where
R: AsyncBufRead + Unpin,
impl<W: ?Sized> Future for Flush<'_, W> where
W: AsyncWrite + Unpin,
impl<W: ?Sized> Future for Flush<'_, W> where
W: AsyncWrite + Unpin,
impl<R: AsyncRead + ?Sized + Unpin> Future for Read<'_, R>
impl<R: AsyncRead + ?Sized + Unpin> Future for Read<'_, R>
impl<R: AsyncRead + ?Sized + Unpin> Future for ReadVectored<'_, R>
impl<R: AsyncRead + ?Sized + Unpin> Future for ReadVectored<'_, R>
impl<R: AsyncRead + ?Sized + Unpin> Future for ReadExact<'_, R>
impl<R: AsyncRead + ?Sized + Unpin> Future for ReadExact<'_, R>
impl<R: AsyncBufRead + ?Sized + Unpin> Future for ReadLine<'_, R>
impl<R: AsyncBufRead + ?Sized + Unpin> Future for ReadLine<'_, R>
impl<A: ?Sized> Future for ReadToEnd<'_, A> where
A: AsyncRead + Unpin,
impl<A: ?Sized> Future for ReadToEnd<'_, A> where
A: AsyncRead + Unpin,
impl<A: ?Sized> Future for ReadToString<'_, A> where
A: AsyncRead + Unpin,
impl<A: ?Sized> Future for ReadToString<'_, A> where
A: AsyncRead + Unpin,
impl<R: AsyncBufRead + ?Sized + Unpin> Future for ReadUntil<'_, R>
impl<R: AsyncBufRead + ?Sized + Unpin> Future for ReadUntil<'_, R>
impl<S: AsyncSeek + ?Sized + Unpin> Future for Seek<'_, S>
impl<S: AsyncSeek + ?Sized + Unpin> Future for Seek<'_, S>
impl<W: AsyncWrite + ?Sized + Unpin> Future for Write<'_, W>
impl<W: AsyncWrite + ?Sized + Unpin> Future for Write<'_, W>
impl<W: AsyncWrite + ?Sized + Unpin> Future for WriteVectored<'_, W>
impl<W: AsyncWrite + ?Sized + Unpin> Future for WriteVectored<'_, W>
impl<W: AsyncWrite + ?Sized + Unpin> Future for WriteAll<'_, W>
impl<W: AsyncWrite + ?Sized + Unpin> Future for WriteAll<'_, W>
impl<'a, T: ?Sized> Future for MutexLockFuture<'a, T>
impl<'a, T: ?Sized> Future for MutexLockFuture<'a, T>
impl<T> Future for JoinHandle<T>
impl<T> Future for JoinHandle<T>
impl<T> Future for Receiver<T>
impl<T> Future for Receiver<T>
impl Future for LocalSet
impl Future for LocalSet
impl Future for Sleep
impl Future for Sleep
impl<T> Future for Timeout<T> where
T: Future,
impl<T> Future for Timeout<T> where
T: Future,
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for Connect<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for Connect<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for Accept<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for Accept<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for FailableConnect<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for FailableConnect<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for FailableAccept<IO>
impl<IO: AsyncRead + AsyncWrite + Unpin> Future for FailableAccept<IO>
impl<'a> Future for WaitForCancellationFuture<'a>
impl<'a> Future for WaitForCancellationFuture<'a>
impl<L, R, O> Future for Either<L, R> where
L: Future<Output = O>,
R: Future<Output = O>,
impl<L, R, O> Future for Either<L, R> where
L: Future<Output = O>,
R: Future<Output = O>,