tokio::io

Struct Split

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pub struct Split<R> { /* private fields */ }
Expand description

Splitter for the split method.

A Split can be turned into a Stream with SplitStream.

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impl<R> Split<R>
where R: AsyncBufRead + Unpin,

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pub async fn next_segment(&mut self) -> Result<Option<Vec<u8>>>

Returns the next segment in the stream.

§Examples
use tokio::io::AsyncBufReadExt;

let mut segments = my_buf_read.split(b'f');

while let Some(segment) = segments.next_segment().await? {
    println!("length = {}", segment.len())
}
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impl<R> Split<R>
where R: AsyncBufRead,

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pub fn poll_next_segment( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Result<Option<Vec<u8>>>>

Polls for the next segment in the stream.

This method returns:

  • Poll::Pending if the next segment is not yet available.
  • Poll::Ready(Ok(Some(segment))) if the next segment is available.
  • Poll::Ready(Ok(None)) if there are no more segments in this stream.
  • Poll::Ready(Err(err)) if an IO error occurred while reading the next segment.

When the method returns Poll::Pending, the Waker in the provided Context is scheduled to receive a wakeup when more bytes become available on the underlying IO resource.

Note that on multiple calls to poll_next_segment, only the Waker from the Context passed to the most recent call is scheduled to receive a wakeup.

Trait Implementations§

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impl<R: Debug> Debug for Split<R>

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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<'__pin, R> Unpin for Split<R>
where PinnedFieldsOf<__Origin<'__pin, R>>: Unpin,

Auto Trait Implementations§

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impl<R> Freeze for Split<R>
where R: Freeze,

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impl<R> RefUnwindSafe for Split<R>
where R: RefUnwindSafe,

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impl<R> Send for Split<R>
where R: Send,

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impl<R> Sync for Split<R>
where R: Sync,

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impl<R> UnwindSafe for Split<R>
where R: 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, 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.