Trait futures_core::future::TryFuture

[+] Show declaration

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>>;
}

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

[+] Show hidden undocumented items

type Ok = T

type Error = E

fn try_poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>