moor VS EtaMOO

I think Haskell or OCaml would do a better job on the ADTs for a parse tree. When doing this, I found Rust's enums... anemic... and got very annoyed by the awkwardness of having to Box recursive types. I was reaching for the ability to continue to be able to pattern match on nodes while attaching common attributes (line numbers, etc.) and ended up having to bury everything 1 level deep in a struct which ended up feeling awkward.

That and Rust's iterators are terrible at introducing ownership agony.

In any case, I've ... done it (https://github.com/rdaum/moor/blob/main/crates/compiler/src/...) but can't say I liked it.

I do really like "pest" as a parser generator though.

See: https://github.com/rdaum/moor

I've been working on a rewrite of the server into Rust, for kicks: https://github.com/rdaum/moor

Unfortunately still lots of work there to be done, and I have no time.

Good luck. As someone who used to work on a lambda-derived MUD it's great to see a little life left in that community. The original server was horribly outdated even 20 years ago.

I also found this project randomly on github at one point, not sure how far along it got to being usable: https://github.com/verement/etamoo