Trait futures_core::future::TryFuture[][src]

pub trait TryFuture: Future + Sealed {
    type Ok;
    type Error;
    fn try_poll(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>
    ) -> Poll<Result<Self::Ok, Self::Error>>; }

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

Associated Types

type Ok[src]

The type of successful values yielded by this future

type Error[src]

The type of failures yielded by this future

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Required methods

fn try_poll(
    self: Pin<&mut Self>,
    cx: &mut Context<'_>
) -> Poll<Result<Self::Ok, Self::Error>>
[src]

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.

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Implementors

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

type Ok = T

type Error = E

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