Struct TakeWeak

#[repr(transparent)]
pub struct TakeWeak<T>(pub Weak<AsyncCell<T>>);

A similar future to Take, but resolves to None when the cell is dropped. Can be constructed directly or with AsyncCell::take_weak.

Tuple Fields

0: Weak<AsyncCell<T>>

Implementations

impl<T> TakeWeak<T>

pub fn upgrade(&self) -> Option<Take<Arc<AsyncCell<T>>>>

Returns a Take promise if the cell has not been dropped.

Trait Implementations

impl<T: Clone> Clone for TakeWeak<T>

fn clone(&self) -> TakeWeak<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Future for &TakeWeak<T>

type Output = Option<T>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T>>

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

impl<T> Future for TakeWeak<T>

type Output = Option<T>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T>>

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