Struct ordered_stream::MapItem

pub struct MapItem<S, F> { /* private fields */ }

A stream for the map_item function.

Trait Implementations

impl<S: Debug, F: Debug> Debug for MapItem<S, F>

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

Formats the value using the given formatter.

impl<S, F, R> OrderedStream for MapItem<S, F>where
    S: OrderedStream,
    F: FnMut(&S::Ordering, S::Data) -> R,

type Data = R

The unordered data carried by this stream

type Ordering = <S as OrderedStream>::Ordering

The type ordered by this stream.

fn poll_next_before(
    self: Pin<&mut Self>,
    cx: &mut Context<'_>,
    before: Option<&Self::Ordering>
) -> Poll<PollResult<Self::Ordering, Self::Data>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if needed, and returning NoneBefore if it is known that the stream will not produce any more values ordered before the given point.

fn position_hint(&self) -> Option<MaybeBorrowed<'_, Self::Ordering>>

The minimum value of the ordering for any future items.

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

Returns the bounds on the remaining length of the stream.

impl<'__pin, S, F> Unpin for MapItem<S, F>where
    __Origin<'__pin, S, F>: Unpin,