Trait futures_util::stream::TryStream

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pub trait TryStream: Stream + Sealed {
    type Ok;
    type Error;

    // Required method
    fn try_poll_next(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
    ) -> Poll<Option<Result<Self::Ok, Self::Error>>>;
}
Expand description

A convenience for streams that return Result values that includes a variety of adapters tailored to such futures.

Required Associated Types§

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type Ok

The type of successful values yielded by this future

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type Error

The type of failures yielded by this future

Required Methods§

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fn try_poll_next( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Option<Result<Self::Ok, Self::Error>>>

Poll this TryStream as if it were a Stream.

This method is a stopgap for a compiler limitation that prevents us from directly inheriting from the Stream trait; in the future it won’t be needed.

Implementors§

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impl<S, T, E> TryStream for S
where S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

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type Error = E