Struct futures::future::Fuse

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#[must_use = "futures do nothing unless polled"]
pub struct Fuse<Fut> where
    Fut: Future,  { /* fields omitted */ }

[−] Expand description

A future which "fuses" a future once it's been resolved.

Normally futures can behave unpredictable once they're used after a future has been resolved, but Fuse is always defined to return Async::Pending from poll after it has resolved successfully or returned an error.

This is created by the Future::fuse method.

Trait Implementations

impl<Fut> Debug for Fuse<Fut> where     Fut: Debug + Future,

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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> Future for Fuse<Fut> where     Fut: Future,

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type Output = <Fut as Future>::Output

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

futures in libcore are unstable

The result of the Future.

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