Trait futures::prelude::TryFuture

[+] Show declaration

pub trait TryFuture {
type Ok;
type Error;
    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.

Associated Types

type Ok[+]

The type of successful values yielded by this future

type Error[+]

The type of failures yielded by this future

Required methods

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

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

[+] Show hidden undocumented items

type Ok = T

type Error = E

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