Struct WithContext

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

Available on crate feature trace only.

A future, stream, or sink that has an associated context.

Trait Implementations

impl<T: Clone> Clone for WithContext<T>

fn clone(&self) -> WithContext<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for WithContext<T>

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

Formats the value using the given formatter.

impl<T: Future> Future for WithContext<T>

type Output = <T as Future>::Output

The type of value produced on completion.

fn poll( self: Pin<&mut Self>, task_cx: &mut TaskContext<'_>, ) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.

impl<I, T> Sink<I> for WithContext<T>

where T: Sink<I>,

type Error = <T as Sink<I>>::Error

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

fn poll_ready( self: Pin<&mut Self>, task_cx: &mut TaskContext<'_>, ) -> Poll<Result<(), Self::Error>>

Attempts to prepare the Sink to receive a value.

fn start_send(self: Pin<&mut Self>, item: I) -> Result<(), Self::Error>

Begin the process of sending a value to the sink. Each call to this function must be preceded by a successful call to poll_ready which returned Poll::Ready(Ok(())).

fn poll_flush( self: Pin<&mut Self>, task_cx: &mut TaskContext<'_>, ) -> Poll<Result<(), Self::Error>>

Flush any remaining output from this sink.

fn poll_close( self: Pin<&mut Self>, task_cx: &mut TaskContext<'_>, ) -> Poll<Result<(), Self::Error>>

Flush any remaining output and close this sink, if necessary.

impl<T: Stream> Stream for WithContext<T>

type Item = <T as Stream>::Item

Values yielded by the stream.

fn poll_next( self: Pin<&mut Self>, task_cx: &mut TaskContext<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted.

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream.

impl<'__pin, T> Unpin for WithContext<T>

where PinnedFieldsOf<__Origin<'__pin, T>>: Unpin,