futures_util::future

Trait TryFuture

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pub trait TryFuture: Future + Sealed {
    type Ok;
    type Error;

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

A convenience for futures 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( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Result<Self::Ok, Self::Error>>

Poll this TryFuture as if it were a Future.

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

Implementors§

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impl<F, T, E> TryFuture for F
where F: Future<Output = Result<T, E>> + ?Sized,

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type Ok = T

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type Error = E