Trait futures::prelude::TryStream

pub trait TryStream {
type Ok;
type Error;
    fn try_poll_next(
        self: Pin<&mut Self>, 
        cx: &mut Context
    ) -> Poll<Option<Result<Self::Ok, Self::Error>>>;
}

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

Associated Types

type Ok

The type of successful values yielded by this future

type Error

The type of failures yielded by this future

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Required methods

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.

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Implementors

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

type Ok = T

type Error = E

fn try_poll_next(
    self: Pin<&mut S>,
    cx: &mut Context
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

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