Struct futures::future::OrElse

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[+] Expand attributes
#[must_use = "futures do nothing unless polled"]
pub struct OrElse<Fut1, Fut2, F> { /* fields omitted */ }

[−] Expand description

Future for the or_else combinator, chaining a computation onto the end of a future which fails with an error.

This is created by the Future::or_else method.

Trait Implementations

impl<Fut1, Fut2, F> Debug for OrElse<Fut1, Fut2, F> where     F: Debug,     Fut1: Debug,     Fut2: Debug,

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fn fmt(&self, f: &mut Formatter) -> Result<(), Error>

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Formats the value using the given formatter.

impl<Fut1, Fut2, F> Future for OrElse<Fut1, Fut2, F> where     F: FnOnce(<Fut1 as TryFuture>::Error) -> Fut2,     Fut1: TryFuture,     Fut2: TryFuture<Ok = <Fut1 as TryFuture>::Ok>,

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type Output = Result<<Fut2 as TryFuture>::Ok, <Fut2 as TryFuture>::Error>

🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

The result of the Future.

fn poll(     self: PinMut<OrElse<Fut1, Fut2, F>>,     cx: &mut Context ) -> Poll<<OrElse<Fut1, Fut2, F> as Future>::Output>

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🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.