rust-langdev VS scala3-example-project

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.

not sure if i’m really convinced of this, rustc being written in rust means there are a lot of great language dev abstractions that have made their way to the ecosystem. particularly for a language frontend, i would argue rust provides a fantastic experience: there are dedicated lexer generators, parsers of all sorts, including some with great error messages out of the box, several variations on rustc-style diagnostic reporting, among others. in fact, as far as frontend implementation, i would argue rust is significantly easier to get off of the ground with than haskell, which has a steep learning curve for some of the really powerful libraries most useful for working with large AST datatypes, and some frankly crusty tools as the “best in class” for lexer and parser generation. granted, parser combinators in haskell are a bit more convenient than in rust, but i think the language dev story as a whole for rust is really solid.

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)