Struct futures::stream::Inspect

[+] Show declaration

[+] Expand attributes
#[must_use = "streams do nothing unless polled"]
pub struct Inspect<St, F> where
    St: Stream,  { /* fields omitted */ }

[−] Expand description

Do something with the items of a stream, passing it on.

This is created by the Stream::inspect method.

Methods

impl<St, F> Inspect<St, F> where     F: FnMut(&<St as Stream>::Item),     St: Stream,

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Important traits for &'a mut I

impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, 

pub fn get_ref(&self) -> &St

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

Important traits for &'a mut I

impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, 

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

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

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

pub fn into_inner(self) -> St

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Consumes this combinator, returning the underlying 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

impl<St, F> Unpin for Inspect<St, F> where     St: Unpin + Stream,

impl<St, F> Debug for Inspect<St, F> where     F: Debug,     St: Debug + Stream,

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

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Formats the value using the given formatter.

impl<St, F> Stream for Inspect<St, F> where     F: FnMut(&<St as Stream>::Item),     St: Stream,

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type Item = <St as Stream>::Item

Values yielded by the stream.

fn poll_next(     self: PinMut<Inspect<St, F>>,     cx: &mut Context ) -> Poll<Option<<St as Stream>::Item>>

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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.