Struct futures::future::UnwrapOrElse

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#[must_use = "futures do nothing unless polled"]
pub struct UnwrapOrElse<Fut, F> { /* fields omitted */ }

[−] Expand description

Future for the unwrap_or_else combinator. It unwraps the result, returning the content of the Ok as Output or if the value is an Err then it calls op with its value.

Trait Implementations

impl<Fut, F> Unpin for UnwrapOrElse<Fut, F> where     Fut: Unpin,

impl<Fut, F> Debug for UnwrapOrElse<Fut, F> where     F: Debug,     Fut: 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<Fut, F> Future for UnwrapOrElse<Fut, F> where     F: FnOnce(<Fut as TryFuture>::Error) -> <Fut as TryFuture>::Ok,     Fut: TryFuture,

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type Output = <Fut as TryFuture>::Ok

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

futures in libcore are unstable

The result of the Future.

fn poll(     self: PinMut<UnwrapOrElse<Fut, F>>,     cx: &mut Context ) -> Poll<<UnwrapOrElse<Fut, 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.