futures::sink

Struct Fanout

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pub struct Fanout<Si1, Si2> { /* private fields */ }
Expand description

Sink that clones incoming items and forwards them to two sinks at the same time.

Backpressure from any downstream sink propagates up, which means that this sink can only process items as fast as its slowest downstream sink.

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impl<Si1, Si2> Fanout<Si1, Si2>

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pub fn get_ref(&self) -> (&Si1, &Si2)

Get a shared reference to the inner sinks.

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pub fn get_mut(&mut self) -> (&mut Si1, &mut Si2)

Get a mutable reference to the inner sinks.

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pub fn get_pin_mut( self: Pin<&mut Fanout<Si1, Si2>>, ) -> (Pin<&mut Si1>, Pin<&mut Si2>)

Get a pinned mutable reference to the inner sinks.

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pub fn into_inner(self) -> (Si1, Si2)

Consumes this combinator, returning the underlying sinks.

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§

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impl<Si1, Si2> Debug for Fanout<Si1, Si2>
where Si1: Debug, Si2: Debug,

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

Formats the value using the given formatter. Read more
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impl<Si1, Si2, Item> Sink<Item> for Fanout<Si1, Si2>
where Si1: Sink<Item>, Item: Clone, Si2: Sink<Item, Error = <Si1 as Sink<Item>>::Error>,

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type Error = <Si1 as Sink<Item>>::Error

The type of value produced by the sink when an error occurs.
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fn poll_ready( self: Pin<&mut Fanout<Si1, Si2>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <Fanout<Si1, Si2> as Sink<Item>>::Error>>

Attempts to prepare the Sink to receive a value. Read more
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fn start_send( self: Pin<&mut Fanout<Si1, Si2>>, item: Item, ) -> Result<(), <Fanout<Si1, Si2> as Sink<Item>>::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(())). Read more
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fn poll_flush( self: Pin<&mut Fanout<Si1, Si2>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <Fanout<Si1, Si2> as Sink<Item>>::Error>>

Flush any remaining output from this sink. Read more
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fn poll_close( self: Pin<&mut Fanout<Si1, Si2>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <Fanout<Si1, Si2> as Sink<Item>>::Error>>

Flush any remaining output and close this sink, if necessary. Read more
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impl<'__pin, Si1, Si2> Unpin for Fanout<Si1, Si2>
where __Origin<'__pin, Si1, Si2>: Unpin,

Auto Trait Implementations§

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impl<Si1, Si2> Freeze for Fanout<Si1, Si2>
where Si1: Freeze, Si2: Freeze,

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impl<Si1, Si2> RefUnwindSafe for Fanout<Si1, Si2>
where Si1: RefUnwindSafe, Si2: RefUnwindSafe,

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impl<Si1, Si2> Send for Fanout<Si1, Si2>
where Si1: Send, Si2: Send,

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impl<Si1, Si2> Sync for Fanout<Si1, Si2>
where Si1: Sync, Si2: Sync,

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impl<Si1, Si2> UnwindSafe for Fanout<Si1, Si2>
where Si1: UnwindSafe, Si2: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, Item> SinkExt<Item> for T
where T: Sink<Item> + ?Sized,

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fn with<U, Fut, F, E>(self, f: F) -> With<Self, Item, U, Fut, F>
where F: FnMut(U) -> Fut, Fut: Future<Output = Result<Item, E>>, E: From<Self::Error>, Self: Sized,

Composes a function in front of the sink. Read more
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fn with_flat_map<U, St, F>(self, f: F) -> WithFlatMap<Self, Item, U, St, F>
where F: FnMut(U) -> St, St: Stream<Item = Result<Item, Self::Error>>, Self: Sized,

Composes a function in front of the sink. Read more
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fn sink_map_err<E, F>(self, f: F) -> SinkMapErr<Self, F>
where F: FnOnce(Self::Error) -> E, Self: Sized,

Transforms the error returned by the sink.
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fn sink_err_into<E>(self) -> SinkErrInto<Self, Item, E>
where Self: Sized, Self::Error: Into<E>,

Map this sink’s error to a different error type using the Into trait. Read more
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fn buffer(self, capacity: usize) -> Buffer<Self, Item>
where Self: Sized,

Adds a fixed-size buffer to the current sink. Read more
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fn close(&mut self) -> Close<'_, Self, Item> ⓘ
where Self: Unpin,

Close the sink.
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fn fanout<Si>(self, other: Si) -> Fanout<Self, Si>
where Self: Sized, Item: Clone, Si: Sink<Item, Error = Self::Error>,

Fanout items to multiple sinks. Read more
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fn flush(&mut self) -> Flush<'_, Self, Item> ⓘ
where Self: Unpin,

Flush the sink, processing all pending items. Read more
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fn send(&mut self, item: Item) -> Send<'_, Self, Item> ⓘ
where Self: Unpin,

A future that completes after the given item has been fully processed into the sink, including flushing. Read more
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fn feed(&mut self, item: Item) -> Feed<'_, Self, Item> ⓘ
where Self: Unpin,

A future that completes after the given item has been received by the sink. Read more
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fn send_all<'a, St>(&'a mut self, stream: &'a mut St) -> SendAll<'a, Self, St> ⓘ
where St: TryStream<Ok = Item, Error = Self::Error> + Stream + Unpin + ?Sized, Self: Unpin,

A future that completes after the given stream has been fully processed into the sink, including flushing. Read more
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fn left_sink<Si2>(self) -> Either<Self, Si2> ⓘ
where Si2: Sink<Item, Error = Self::Error>, Self: Sized,

Wrap this sink in an Either sink, making it the left-hand variant of that Either. Read more
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fn right_sink<Si1>(self) -> Either<Si1, Self> ⓘ
where Si1: Sink<Item, Error = Self::Error>, Self: Sized,

Wrap this stream in an Either stream, making it the right-hand variant of that Either. Read more
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fn poll_ready_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
where Self: Unpin,

A convenience method for calling Sink::poll_ready on Unpin sink types.
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fn start_send_unpin(&mut self, item: Item) -> Result<(), Self::Error>
where Self: Unpin,

A convenience method for calling Sink::start_send on Unpin sink types.
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fn poll_flush_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
where Self: Unpin,

A convenience method for calling Sink::poll_flush on Unpin sink types.
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fn poll_close_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
where Self: Unpin,

A convenience method for calling Sink::poll_close on Unpin sink types.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.