[−][src]Struct futures::channel::oneshot::Receiver
A future for a value that will be provided by another asynchronous task.
This is created by the [channel
] function.
Methods
impl<T> Receiver<T>
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pub fn close(&mut self)
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Gracefully close this receiver, preventing any subsequent attempts to send to it.
Any send
operation which happens after this method returns is
guaranteed to fail. After calling this method, you can use
Receiver::poll
to determine whether a
message had previously been sent.
pub fn try_recv(&mut self) -> Result<Option<T>, Canceled>
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Attempts to receive a message outside of the context of a task.
Does not schedule a task wakeup or have any other side effects.
A return value of None
must be considered immediately stale (out of
date) unless close
has been called first.
Returns an error if the sender was dropped.
Trait Implementations
impl<T> Unpin for Receiver<T>
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impl<T> Future for Receiver<T>
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type Output = Result<T, Canceled>
The type of value produced on completion.
fn poll(
self: Pin<&mut Receiver<T>>,
cx: &mut Context
) -> Poll<Result<T, Canceled>>
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self: Pin<&mut Receiver<T>>,
cx: &mut Context
) -> Poll<Result<T, Canceled>>
impl<T> Debug for Receiver<T> where
T: Debug,
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T: Debug,
impl<T> Drop for Receiver<T>
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Auto Trait Implementations
impl<T> Send for Receiver<T> where
T: Send,
T: Send,
impl<T> Sync for Receiver<T> where
T: Send,
T: Send,
impl<T> !RefUnwindSafe for Receiver<T>
impl<T> !UnwindSafe for Receiver<T>
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>> + ?Sized,
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F: Future<Output = Result<T, E>> + ?Sized,
type Ok = T
The type of successful values yielded by this future
type Error = E
The type of failures yielded by this future
fn try_poll(self: Pin<&mut F>, cx: &mut Context) -> Poll<<F as Future>::Output>
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impl<T> FutureExt for T where
T: Future + ?Sized,
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T: Future + ?Sized,
ⓘImportant traits for Map<Fut, F>fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Output) -> U,
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F: FnOnce(Self::Output) -> U,
ⓘImportant traits for Then<Fut1, Fut2, F>fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnOnce(Self::Output) -> Fut,
Fut: Future,
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F: FnOnce(Self::Output) -> Fut,
Fut: Future,
ⓘImportant traits for Either<A, B>fn left_future<B>(self) -> Either<Self, B> where
B: Future<Output = Self::Output>,
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B: Future<Output = Self::Output>,
ⓘImportant traits for Either<A, B>fn right_future<A>(self) -> Either<A, Self> where
A: Future<Output = Self::Output>,
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A: Future<Output = Self::Output>,
fn into_stream(self) -> IntoStream<Self>
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ⓘImportant traits for Flatten<Fut>fn flatten(self) -> Flatten<Self> where
Self::Output: Future,
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Self::Output: Future,
fn flatten_stream(self) -> FlattenStream<Self> where
Self::Output: Stream,
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Self::Output: Stream,
ⓘImportant traits for Fuse<Fut>fn fuse(self) -> Fuse<Self>
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ⓘImportant traits for Inspect<Fut, F>fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Output),
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F: FnOnce(&Self::Output),
ⓘImportant traits for CatchUnwind<Fut>fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
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Self: UnwindSafe,
ⓘImportant traits for Shared<Fut>fn shared(self) -> Shared<Self> where
Self::Output: Clone,
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Self::Output: Clone,
fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)
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ⓘImportant traits for Pin<P>fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send>> where
Self: Send + 'a,
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Self: Send + 'a,
ⓘImportant traits for Pin<P>fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>> where
Self: 'a,
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Self: 'a,
ⓘImportant traits for UnitError<Fut>fn unit_error(self) -> UnitError<Self>
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ⓘImportant traits for NeverError<Fut>fn never_error(self) -> NeverError<Self>
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fn poll_unpin(&mut self, cx: &mut Context) -> Poll<Self::Output> where
Self: Unpin,
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Self: Unpin,
fn now_or_never(self) -> Option<Self::Output>
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impl<Fut> TryFutureExt for Fut where
Fut: TryFuture + ?Sized,
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Fut: TryFuture + ?Sized,
fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
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Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
ⓘImportant traits for MapOk<Fut, F>fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where
F: FnOnce(Self::Ok) -> T,
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F: FnOnce(Self::Ok) -> T,
ⓘImportant traits for MapErr<Fut, F>fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where
F: FnOnce(Self::Error) -> E,
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F: FnOnce(Self::Error) -> E,
ⓘImportant traits for ErrInto<Fut, E>fn err_into<E>(self) -> ErrInto<Self, E> where
Self::Error: Into<E>,
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Self::Error: Into<E>,
ⓘImportant traits for AndThen<Fut1, Fut2, F>fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where
F: FnOnce(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
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F: FnOnce(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
ⓘImportant traits for OrElse<Fut1, Fut2, F>fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where
F: FnOnce(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
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F: FnOnce(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
ⓘImportant traits for InspectOk<Fut, F>fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where
F: FnOnce(&Self::Ok),
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F: FnOnce(&Self::Ok),
ⓘImportant traits for InspectErr<Fut, F>fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnOnce(&Self::Error),
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F: FnOnce(&Self::Error),
fn try_flatten_stream(self) -> TryFlattenStream<Self> where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
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Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
ⓘImportant traits for UnwrapOrElse<Fut, F>fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
F: FnOnce(Self::Error) -> Self::Ok,
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F: FnOnce(Self::Error) -> Self::Ok,
ⓘImportant traits for Compat<R>fn compat(self) -> Compat<Self> where
Self: Unpin,
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Self: Unpin,
ⓘImportant traits for IntoFuture<Fut>fn into_future(self) -> IntoFuture<Self>
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fn try_poll_unpin(
&mut self,
cx: &mut Context
) -> Poll<Result<Self::Ok, Self::Error>> where
Self: Unpin,
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&mut self,
cx: &mut Context
) -> Poll<Result<Self::Ok, Self::Error>> where
Self: Unpin,