Tooling for Scala3

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 !!