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dotty-cps-async

This is the implementation of async/await transformation for Scala 3 (Dotty), based on an optimized version of CPS (Continuation Passing Style) transformation, where the continuation is ‘pushed’ to the monad.

Highlights

• Full support of all Scala language constructs in async/await block.
• Pluggable monad interface:
  • An await monad can be any trait for which it is possible to implement CpsAsyncMonad type class. You can provide those methods for your favorite monad.
• Limited support of high-order functions:
  • urls.map(fetchData(_))(await _ ) is an idiomatic way to fetch data for all items in parallel.
  • An application developer or library author can provide 'shifted' implementation of the own high-order functions.
• Optional features, which enhance ergonomics in some cases, such as automatic coloring and handling discarded values
• Optional SIP-22 compatible API.

For more details, please, read the documentation at https://rssh.github.io/dotty-cps-async/.

Presentations

• Embedding generic monadic transformers into scala.

  • Trends in Functional Programming 2022. https://www.slideshare.net/rssh1/embedding-generic-monadic-transformer-into-scala-tfp2022 (May 2022)

• Scala3 & Async: Behind Futures.

  • Svitla Smart Talk. https://www.youtube.com/watch?v=fBcGhjM2s-c (April 2021. In Ukrainian language).

• Can we free concurrent programming from the monadic style?

  • ScalaR: https://www.youtube.com/watch?v=ImlUuTQUeaQ (June 2020)
  • ScalaUA: https://www.youtube.com/watch?v=w-noRPLxYoA&t=3s (April 2020) (slides: https://www.slideshare.net/rssh1/can-concurrent-functional-programming-be-liberated-from-monadic-style )