The Flix compiler is written in Scala. The Flix Standard Library and runtime, which includes a Datalog JIT, is written in Flix. GitHub does not yet recognize .flix, so the numbers reported are an inaccurate representation of the actual code in the repo.

Looking at the GitHub repo, it’s written in Scala.

Ok, then I'll wait until they start dogfooding ;)

Looks incredibly cool though.

It doesn't make much sense to self-host compiler unless there is a significant community (resources) or you don't want to write another compiler in it.