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# Rust async playground
## Notes
Research started in 2019 - https://users.rust-lang.org/t/designing-an-async-flow-of-data/29148 and got pointed to `Stream` and `Sink` which are the appropriate abstractions for async *iteration*.
They weren't stable at the time, but seem to be maturing in the `futures` crate:
https://docs.rs/futures/0.3.6/futures/sink/trait.Sink.html
https://docs.rs/futures/0.3.6/futures/stream/trait.Stream.html
This is the relevant chapter in the Rust Async Book - https://rust-lang.github.io/async-book/05_streams/02_iteration_and_concurrency.html
Meanwhile it seems some features aren't fully stable in Rust just yet. Some crates provide relevant functionality
https://github.com/taiki-e/futures-async-stream
https://github.com/tokio-rs/async-stream
This page has a good review https://blog.yoshuawuyts.com/rust-streams/
## Design
Each block processes input and out asynchronously.
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