This comment is really not relevant to my post, but its a work in progress. Async closures were just added to the nightly compiler, and their author wrote an as

This comment is really not relevant to my post, but its a work in progress. Async closures were just added to the nightly compiler, and their author wrote an async iterator combinator library here: https://github.com/compiler-errors/async-iterator-ext https://github.com/compiler-errors/async-iterator-ext