Struct futures_util::sink::WithFlatMap

[+] Show declaration

[+] Expand attributes
#[must_use = "sinks do nothing unless polled"]
pub struct WithFlatMap<Si, Item, U, St, F> { /* fields omitted */ }

[−] Expand description

Sink for the with_flat_map method.

Methods

impl<Si, Item, U, St, F> WithFlatMap<Si, Item, U, St, F> where
    Si: Sink<Item>,
    F: FnMut(U) -> St,
    St: Stream<Item = Result<Item, Si::Error>>, [−]

Important traits for &'_ mut F

impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized,  type Output = <F as Future>::Output;

pub fn get_ref(&self) -> &Si[−]

Get a shared reference to the inner sink.

Important traits for &'_ mut F

impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized,  type Output = <F as Future>::Output;

pub fn get_mut(&mut self) -> &mut Si[−]

Get a mutable reference to the inner sink.

Important traits for Pin<P>

impl<P> Future for Pin<P> where
    P: Unpin + DerefMut,
    <P as Deref>::Target: Future,  type Output = <<P as Deref>::Target as Future>::Output;

pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut Si>[−]

Get a pinned mutable reference to the inner sink.

pub fn into_inner(self) -> Si[−]

Consumes this combinator, returning the underlying sink.

Note that this may discard intermediate state of this combinator, so care should be taken to avoid losing resources when this is called.

Trait Implementations

impl<Si, Item, U, St, F> Unpin for WithFlatMap<Si, Item, U, St, F> where
    Si: Unpin,
    St: Unpin, 

impl<Si, Item, U, St, F> Debug for WithFlatMap<Si, Item, U, St, F> where
    Si: Debug,
    St: Debug,
    Item: Debug, [+]

[+] Show hidden undocumented items

fn fmt(&self, f: &mut Formatter) -> Result[−]

Formats the value using the given formatter.

impl<S, Item, U, St, F> Stream for WithFlatMap<S, Item, U, St, F> where
    S: Stream + Sink<Item>,
    F: FnMut(U) -> St,
    St: Stream<Item = Result<Item, S::Error>>, [+]

[+] Show hidden undocumented items

type Item = S::Item

Values yielded by the stream.

fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<S::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<S, Item, U, St, F> FusedStream for WithFlatMap<S, Item, U, St, F> where
    S: FusedStream + Sink<Item>,
    F: FnMut(U) -> St,
    St: Stream<Item = Result<Item, S::Error>>, [+]

[+] Show hidden undocumented items

fn is_terminated(&self) -> bool[−]

Returns true if the stream should no longer be polled.

impl<Si, Item, U, St, F> Sink<U> for WithFlatMap<Si, Item, U, St, F> where
    Si: Sink<Item>,
    F: FnMut(U) -> St,
    St: Stream<Item = Result<Item, Si::Error>>, [+]

[+] Show hidden undocumented items

type Error = Si::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: U) -> 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.