Struct futures::sink::With[][src]

#[must_use = "sinks do nothing unless polled"]
pub struct With<Si, U, Fut, F> where
    F: FnMut(U) -> Fut,
    Fut: Future,
    Si: Sink
{ /* fields omitted */ }

Sink for the Sink::with combinator, chaining a computation to run prior to pushing a value into the underlying sink.

Methods

impl<Si, U, Fut, F, E> With<Si, U, Fut, F> where
    E: From<<Si as Sink>::SinkError>,
    F: FnMut(U) -> Fut,
    Fut: Future<Output = Result<<Si as Sink>::SinkItem, E>>,
    Si: Sink
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Important traits for &'a mut I

Get a shared reference to the inner sink.

Important traits for &'a mut I

Get a mutable reference to the inner sink.

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, U, Fut, F> Debug for With<Si, U, Fut, F> where
    F: Debug + FnMut(U) -> Fut,
    Fut: Debug + Future,
    Si: Debug + Sink,
    U: Debug,
    <Si as Sink>::SinkItem: Debug
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Formats the value using the given formatter. Read more

impl<Si, U, Fut, F, E> Sink for With<Si, U, Fut, F> where
    E: From<<Si as Sink>::SinkError>,
    F: FnMut(U) -> Fut,
    Fut: Future<Output = Result<<Si as Sink>::SinkItem, E>>,
    Si: Sink
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The type of value that the sink accepts.

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

Attempts to prepare the Sink to receive a value. Read more

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

Flush any remaining output from this sink. Read more

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

impl<Si, U, Fut, F> Unpin for With<Si, U, Fut, F> where
    F: FnMut(U) -> Fut,
    Fut: Future + Unpin,
    Si: Sink + Unpin
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impl<S, U, Fut, F> Stream for With<S, U, Fut, F> where
    F: FnMut(U) -> Fut,
    Fut: Future,
    S: Stream + Sink
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Values yielded by the stream.

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. Read more

Auto Trait Implementations

impl<Si, U, Fut, F> Send for With<Si, U, Fut, F> where
    F: Send,
    Fut: Send,
    Si: Send,
    <Si as Sink>::SinkItem: Send

impl<Si, U, Fut, F> Sync for With<Si, U, Fut, F> where
    F: Sync,
    Fut: Sync,
    Si: Sync,
    <Si as Sink>::SinkItem: Sync

Blanket Implementations

impl<T> From for T
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut I

Immutably borrows from an owned value. Read more

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut I

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<T> StreamExt for T where
    T: Stream + ?Sized
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Creates a future that resolves to the next item in the stream. Read more

Converts this stream into a future of (next_item, tail_of_stream). If the stream terminates, then the next item is None. Read more

Maps this stream's items to a different type, returning a new stream of the resulting type. Read more

Filters the values produced by this stream according to the provided asynchronous predicate. Read more

Filters the values produced by this stream while simultaneously mapping them to a different type according to the provided asynchronous closure. Read more

Computes from this stream's items new items of a different type using an asynchronous closure. Read more

Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more

Concatenate all items of a stream into a single extendable destination, returning a future representing the end result. Read more

Execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more

Flattens a stream of streams into just one continuous stream. Read more

Skip elements on this stream while the provided asynchronous predicate resolves to true. Read more

Take elements from this stream while the provided asynchronous predicate resolves to true. Read more

Runs this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more

Creates a new stream of at most n items of the underlying stream. Read more

Creates a new stream which skips n items of the underlying stream. Read more

Fuse a stream such that poll_next will never again be called once it has finished. Read more

Important traits for &'a mut I

Borrows a stream, rather than consuming it. Read more

Catches unwinding panics while polling the stream. Read more

An adaptor for creating a buffered list of pending futures. Read more

An adaptor for creating a buffered list of pending futures (unordered). Read more

An adapter for zipping two streams together. Read more

Adapter for chaining two stream. Read more

Creates a new stream which exposes a peek method. Read more

An adaptor for chunking up items of the stream inside a vector. Read more

Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first. Read more

A future that completes after the given stream has been fully processed into the sink, including flushing. Read more

Splits this Stream + Sink object into separate Stream and Sink objects. Read more

Do something with each item of this stream, afterwards passing it on. Read more

Important traits for Either<L, R>

Wrap this stream in an Either stream, making it the left-hand variant of that Either. Read more

Important traits for Either<L, R>

Wrap this stream in an Either stream, making it the right-hand variant of that Either. Read more

A convenience for calling Stream::poll_next on [Unpin] stream types. Read more

impl<S, T, E> TryStream for S where
    S: Stream<Item = Result<T, E>>, 
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The type of successful values yielded by this future

The type of failures yielded by this future

Poll this TryStream as if it were a Stream. Read more

impl<S> TryStreamExt for S where
    S: TryStream
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Wraps the current stream in a new stream which converts the error type into the one provided. Read more

Wraps the current stream in a new stream which maps the success value using the provided closure. Read more

Wraps the current stream in a new stream which maps the error value using the provided closure. Read more

Creates a future that attempts to resolve the next item in the stream. If an error is encountered before the next item, the error is returned instead. Read more

Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more

Attempt to Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more

impl<T> SinkExt for T where
    T: Sink + ?Sized
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Composes a function in front of the sink. Read more

Composes a function in front of the sink. Read more

Transforms the error returned by the sink.

Map this sink's error to a different error type using the Into trait. Read more

Adds a fixed-size buffer to the current sink. Read more

Close the sink.

Fanout items to multiple sinks. Read more

Flush the sync, processing all pending items. Read more

A future that completes after the given item has been fully processed into the sink, including flushing. Read more

A future that completes after the given stream has been fully processed into the sink, including flushing. Read more

Important traits for Either<L, R>

Wrap this sink in an Either sink, making it the left-hand variant of that Either. Read more

Important traits for Either<L, R>

Wrap this stream in an Either stream, making it the right-hand variant of that Either. Read more