scala3-example-project VS rust-langdev

However, using the scala/scalac shell scripts directly is rarely what you want in practice. I recommend either setting up a project using sbt (you can start from the template at https://github.com/scala/scala3-example-project) or using scala-cli.

Only 1.2.0-M1 has been published for Scala 3 so you need to use that version: https://repo1.maven.org/maven2/org/scala-lang/modules/scala-parser-combinators_3.0.0-M3/ (or fallback to the Scala 2 version using withDottyCompat, cf https://github.com/scala/scala3-example-project#getting-your-project-to-compile-with-dotty)

If you're doing lang dev, maybe check out https://github.com/Kixiron/rust-langdev. I haven't done much since college, not in rust, but I've heard good things

rust-langdev has a lot of libraries for building compilers in Rust. Perhaps you could use these to make your implementation easier, and revisit it later if you want to build things from scratch. I'd suggest logos for lexing, LALRPOP / chumsky for parsing, and rust-gc for garbage collection.

https://github.com/Kixiron/rust-langdev is a pretty nice list of libraries for Rust lang dev including parsers.

Someone showed me this repo with a bunch of lang dev libraries a while ago. I haven't done anything with it personally, but it may be of interest to you https://github.com/Kixiron/rust-langdev

https://github.com/Kixiron/rust-langdev for additional resources and libraries

Absolutely. For a non-exhaustive list of other languages written in Rust, there is https://github.com/alilleybrinker/langs-in-rust. If you are looking for libraries to help you along the way, check out https://github.com/Kixiron/rust-langdev.