Enum core::future::join::MaybeDone

pub enum MaybeDone<F: Future> {
    Future(F),
    Done(F::Output),
    Taken,
}

🔬This is a nightly-only experimental API. (future_join #91642)

Future used by join! that stores it’s output to be later taken and doesn’t panic when polled after ready.

This type is public in a private module for use by the macro.

Variants

Future(F)

🔬This is a nightly-only experimental API. (future_join #91642)

Done(F::Output)

🔬This is a nightly-only experimental API. (future_join #91642)

Taken

🔬This is a nightly-only experimental API. (future_join #91642)

Implementations

impl<F: Future> MaybeDone<F>

pub fn take_output(&mut self) -> Option<F::Output>

🔬This is a nightly-only experimental API. (future_join #91642)

Trait Implementations

impl<F: Future> Future for MaybeDone<F>

type Output = ()

The type of value produced on completion.

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

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