Function async_scoped::scope

pub unsafe fn scope<'a, T: Send + 'static, R, F: FnOnce(&mut Scope<'a, T>) -> R>(
    f: F
) -> (VerifiedStream<'a, FuturesOrdered<JoinHandle<T>>>, R)

Creates a Scope to spawn non-'static futures. The function is called with a block which takes an &mut Scope. The spawn method on this arg. can be used to spawn "local" futures.

Returns

The returned value implements Stream and is expected to be driven completely before being dropped. The values returned are either the output of the future, or the stack-trace if it panicked.

Safety

The returned stream is expected to be run to completion. For safety, the returned stream panics if dropped before run to completion. It is also marked as !Unpin to help mark the parent future which drives it also thus.