Interactive development with Dotty

on YouTube ↗47m

" summary

Dotty (Scala 3) provides interactive tooling by reusing compiler internals: it serializes TASTy trees into classfiles so IDE features can query compiled libraries, implements a Language Server Protocol backend, and offers an sbt plugin that exports project metadata and launches VS Code via coursier. Core interactive APIs and a minimal language server (~500 lines of code) already provide goto-definition, completion and a debugger proof‑of‑concept, with further features and optimizations planned.

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" chapters (14)

1. 0:00Dotty introduction
2. 3:12Scala IDE problems
3. 6:06Modern IDE design
4. 7:51Compiler reuse for IDE
5. 12:31TASTy and compiled code
6. 17:53Interactive IDE API
7. 19:38IDE portability with LSP
8. 23:33Dotty language server
9. 26:45Simplified setup and UX
10. 29:37Optimizations and future
11. 32:52Debugging support in Dotty
12. 36:05Lessons and future outlook
13. 40:07Dotty’s interactive evolution
14. 44:44Live Dotty IDE demo

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