Trait futures_util::future::TryFuture

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

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

pub 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.

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Implementors

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

type Ok = T

type Error = E

pub fn try_poll(
    self: Pin<&mut F>,
    cx: &mut Context<'_>
) -> Poll<<F as Future>::Output>

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