Struct futures_util::future::FlattenSink

#[must_use = "futures/streams/sinks do nothing unless you `.await` or poll them"]
pub struct FlattenSink<Fut, Si> { /* fields omitted */ }

Sink for the flatten_sink method.

Trait Implementations

impl<Fut, Si> Debug for FlattenSink<Fut, Si> where
    TryFlatten<Fut, Si>: Debug, 

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

Formats the value using the given formatter.

impl<Fut, Si> FusedStream for FlattenSink<Fut, Si> where
    TryFlatten<Fut, Si>: FusedStream, 

fn is_terminated(&self) -> bool

Returns true if the stream should no longer be polled.

impl<_Item, Fut, Si> Sink<_Item> for FlattenSink<Fut, Si> where
    TryFlatten<Fut, Si>: Sink<_Item>, 

type Error = <TryFlatten<Fut, Si> as Sink<_Item>>::Error

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

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

Attempts to prepare the Sink to receive a value.

fn start_send(self: Pin<&mut Self>, item: _Item) -> 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>,
    cx: &mut Context<'_>
) -> Poll<Result<(), Self::Error>>

Flush any remaining output from this sink.

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

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

impl<Fut, Si> Stream for FlattenSink<Fut, Si> where
    TryFlatten<Fut, Si>: Stream, 

type Item = <TryFlatten<Fut, Si> as Stream>::Item

Values yielded by the stream.

fn poll_next(
    self: Pin<&mut Self>,
    cx: &mut Context<'_>
) -> 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, Fut, Si> Unpin for FlattenSink<Fut, Si> where
    __Origin<'__pin, Fut, Si>: Unpin,