I use asio at work for coroutine. It's one of the most opaque library I've ever used. The doc is awful and impenetrable. The most helpful resource about it is

I use asio at work for coroutine. It's one of the most opaque library I've ever used. The doc is awful and impenetrable. The most helpful resource about it is a guy on stackoverflow (sehe). No idea how to get help once SO will have closed