Equivalent of `tokio::sync::watch`

[joshtriplett]

I'd love to have an equivalent of the tokio::sync::watch types. These provide a channel that stores only the latest value sent. This is convenient for request coalescing: first one in creates the watch and spawns a task to do the request, subsequent requests wait on the existing watch.

[notgull]

Yes, this would be a nice addition. It would probably be a separate crate.

[notgull]

There is async-watch, which is based on tokio's implementation and built on event-listener. But it hasn't been updated for several years.

Poke @cynecx

[nanoqsh]

I wrote a simple alternative async-observe: no unsafe, straightforward API. Use it if you find it useful.