Tooling for Scala3

#reactive_shinjuku

Transcript

1. Rikito Taniguchi (@tanishiking)
 (Weekend OSS contributor to Scala tooling) Tooling for Scala 3 Reactive System Meetup#7
2. Scala 3 has landed 🎉
3. Requirements for transition to Scala 3 Requirements IMO • Stabilizing the compiler • More learning resources • Libraries support for Scala 3 • Tooling support for Scala 3 👈 today’s topic
4. Tooling for Scala 3 scalameta based tools • scalafmt • scala fi x • metals TL;DR Basic Scala 3 supports are already done.
 Ready to use!
5. Scalafmt & Scala 3 scalafmt v3 supports Scala 3 Specify runner.dialect = scala3 .scalafmt.conf
6. Scalafix & Scala 3 Scala fi x v0.9.28 introduces experimental Scala 3 support ! https://github.com/liancheng/scala fi x-organize-imports#scala-3 liancheng/scala fi x-organize-imports works with Scala 3
7. Write your own rule for Scala 3 sbt new scalacenter/scala fi x.g 8 ↑ generates a rule template that runs both on Scala 2 and Scala 3 You can write both SyntacticRule and SemanticRule
8. Metals & Scala 3 Metals works with Scala 3 ! Code Completion Code Navigation / Hover Show inferred type (will be available with Scala 3.1.0)
9. Metals & Scala 3 - Missing features Some advanced features are still missing in Scala 3 😢 Exhaustive case completion Implement abstract members
10. Today’s takeaway • Many tools already have basic supports for Scala 3 ! • Some features are missing… need more e ff ort 💪 • Please try it out, and give us feedback. HAPPY CODING WITH SCALA 3 !!