Struct FallibleTask 

pub struct FallibleTask<T>(/* private fields */);

A Task that resolves to Option<T>, and to None instead of panicking when the task is cancelled.

Create one with Task::fallible. Like Task, dropping it cancels the future and detaching lets it finish. Await it to get Some(output), or None if the task closed without an output. A panic in the future still propagates to the awaiter.

Implementations

impl<T> FallibleTask<T>

pub fn ready(val: T) -> Self

Returns a fallible task that is already complete and resolves to Some(val).

pub fn detach(self)

Lets the future run to completion in the background and discards its output. See Task::detach.

Trait Implementations

impl<T> Debug for FallibleTask<T>

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

Formats the value using the given formatter.

impl<T: 'static> Future for FallibleTask<T>

type Output = Option<T>

The type of value produced on completion.

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

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