Function channel

pub fn channel<T, F>(
    size: usize,
    f: impl FnOnce(Sender<T>) -> F,
) -> impl Stream<Item = T>
where
    F: Future<Output = ()>,

Creates a new Stream that produces the items sent from a Future to the mpsc::Sender provided to the closure.

This is a more ergonomic stream::unfold, which allows you to go from the “world of futures” to the “world of streams” by simply looping and publishing to an async channel from inside a Future.