pub struct FilterMap<St, Fut, F> { /* private fields */ }
Expand description

Stream for the filter_map method.

Implementations§

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impl<St, Fut, F> FilterMap<St, Fut, F>where St: Stream, F: FnMut(St::Item) -> Fut, Fut: Future,

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pub fn get_ref(&self) -> &St

Acquires a reference to the underlying sink or stream that this combinator is pulling from.

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pub fn get_mut(&mut self) -> &mut St

Acquires a mutable reference to the underlying sink or stream that this combinator is pulling from.

Note that care must be taken to avoid tampering with the state of the sink or stream which may otherwise confuse this combinator.

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pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut St>

Acquires a pinned mutable reference to the underlying sink or stream that this combinator is pulling from.

Note that care must be taken to avoid tampering with the state of the sink or stream which may otherwise confuse this combinator.

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pub fn into_inner(self) -> St

Consumes this combinator, returning the underlying sink or stream.

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<St, Fut, F> Debug for FilterMap<St, Fut, F>where St: Debug, Fut: Debug,

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

Formats the value using the given formatter. Read more
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impl<St, Fut, F, T> FusedStream for FilterMap<St, Fut, F>where St: Stream + FusedStream, F: FnMut1<St::Item, Output = Fut>, Fut: Future<Output = Option<T>>,

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fn is_terminated(&self) -> bool

Returns true if the stream should no longer be polled.
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impl<S, Fut, F, Item> Sink<Item> for FilterMap<S, Fut, F>where S: Stream + Sink<Item>, F: FnMut1<S::Item, Output = Fut>, Fut: Future,

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type Error = <S 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 Self>, cx: &mut Context<'_> ) -> Poll<Result<(), Self::Error>>

Attempts to prepare the Sink to receive a value. Read more
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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(())). Read more
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fn poll_flush( self: Pin<&mut Self>, cx: &mut Context<'_> ) -> Poll<Result<(), Self::Error>>

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

Flush any remaining output and close this sink, if necessary. Read more
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impl<St, Fut, F, T> Stream for FilterMap<St, Fut, F>where St: Stream, F: FnMut1<St::Item, Output = Fut>, Fut: Future<Output = Option<T>>,

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type Item = T

Values yielded by the stream.
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T>>

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

Returns the bounds on the remaining length of the stream. Read more
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impl<'__pin, St, Fut, F> Unpin for FilterMap<St, Fut, F>where __Origin<'__pin, St, Fut, F>: Unpin,

Auto Trait Implementations§

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impl<St, Fut, F> RefUnwindSafe for FilterMap<St, Fut, F>where F: RefUnwindSafe, Fut: RefUnwindSafe, St: RefUnwindSafe,

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impl<St, Fut, F> Send for FilterMap<St, Fut, F>where F: Send, Fut: Send, St: Send,

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impl<St, Fut, F> Sync for FilterMap<St, Fut, F>where F: Sync, Fut: Sync, St: Sync,

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impl<St, Fut, F> UnwindSafe for FilterMap<St, Fut, F>where F: UnwindSafe, Fut: UnwindSafe, St: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere 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 Twhere 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 Twhere 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 Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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 Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S, T, E> TryStream for Swhere S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

The type of successful values yielded by this future
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type Error = E

The type of failures yielded by this future
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fn try_poll_next( self: Pin<&mut S>, cx: &mut Context<'_> ) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

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