Struct Sender

pub struct Sender<T> { /* private fields */ }

Send values to the associated Receiver.

Instances are created by the channel function.

Implementations

impl<T> Sender<T>

pub fn poll_ready(&mut self) -> Poll<(), SendError>

Check if the Sender is ready to handle a value.

Polls the channel to determine if there is guaranteed capacity to send at least one item without waiting.

When poll_ready returns Ready, the channel reserves capacity for one message for this Sender instance. The capacity is held until a message is send or the Sender instance is dropped. Callers should ensure a message is sent in a timely fashion in order to not starve other Sender instances.

Return value

This method returns:

• Ok(Async::Ready(_)) if capacity is reserved for a single message.
• Ok(Async::NotReady) if the channel may not have capacity, in which case the current task is queued to be notified once capacity is available;
• Err(SendError) if the receiver has been dropped.

pub fn try_send(&mut self, message: T) -> Result<(), TrySendError<T>>

Attempts to send a message on this Sender, returning the message if there was an error.

Trait Implementations

impl<T> Clone for Sender<T>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Sender<T>

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> Sink for Sender<T>

type SinkItem = T

The type of value that the sink accepts.

type SinkError = SendError

The type of value produced by the sink when an error occurs.

fn start_send(&mut self, msg: T) -> StartSend<T, Self::SinkError>

Begin the process of sending a value to the sink.

fn poll_complete(&mut self) -> Poll<(), Self::SinkError>

Flush all output from this sink, if necessary.

fn close(&mut self) -> Poll<(), Self::SinkError>

A method to indicate that no more values will ever be pushed into this sink.

fn wait(self) -> Wait<Self>

where Self: Sized,

Creates a new object which will produce a synchronous sink.

fn with<U, F, Fut>(self, f: F) -> With<Self, U, F, Fut>

where F: FnMut(U) -> Fut, Fut: IntoFuture<Item = Self::SinkItem>, <Fut as IntoFuture>::Error: From<Self::SinkError>, Self: Sized,

Composes a function in front of the sink.

fn with_flat_map<U, F, St>(self, f: F) -> WithFlatMap<Self, U, F, St>

where F: FnMut(U) -> St, St: Stream<Item = Self::SinkItem, Error = Self::SinkError>, Self: Sized,

Composes a function in front of the sink.

fn sink_map_err<F, E>(self, f: F) -> SinkMapErr<Self, F>

where F: FnOnce(Self::SinkError) -> E, Self: Sized,

Transforms the error returned by the sink.

fn sink_from_err<E>(self) -> SinkFromErr<Self, E>

where E: From<Self::SinkError>, Self: Sized,

Map this sink’s error to any error implementing From for this sink’s Error, returning a new sink.

fn buffer(self, amt: usize) -> Buffer<Self>

where Self: Sized,

Adds a fixed-size buffer to the current sink.

fn fanout<S>(self, other: S) -> Fanout<Self, S>

where Self: Sized, Self::SinkItem: Clone, S: Sink<SinkItem = Self::SinkItem, SinkError = Self::SinkError>,

Fanout items to multiple sinks.

fn flush(self) -> Flush<Self>

where Self: Sized,

A future that completes when the sink has finished processing all pending requests.

fn send(self, item: Self::SinkItem) -> Send<Self>

where Self: Sized,

A future that completes after the given item has been fully processed into the sink, including flushing.

fn send_all<S>(self, stream: S) -> SendAll<Self, S>

where S: Stream<Item = Self::SinkItem>, Self::SinkError: From<<S as Stream>::Error>, Self: Sized,

A future that completes after the given stream has been fully processed into the sink, including flushing.