Struct futures_util::sink::unfold::Unfold

pub struct Unfold<T, F, R> {
    function: F,
    state: UnfoldState<T, R>,
}

Sink for the unfold function.

Fields

function: F

state: UnfoldState<T, R>

Trait Implementations

impl<T: Debug, F: Debug, R: Debug> Debug for Unfold<T, F, R>

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

Formats the value using the given formatter.

impl<T, F, R, Item, E> Sink<Item> for Unfold<T, F, R>

where F: FnMut(T, Item) -> R, R: Future<Output = Result<T, E>>,

type Error = E

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<'__pin, T, F, R> Unpin for Unfold<T, F, R>

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