I don't know when you tried it, but I had a similar need (build a query parser for a tiny SQL subset in a day) a few weeks back, and it took me may be a couple

I don't know when you tried it, but I had a similar need (build a query parser for a tiny SQL subset in a day) a few weeks back, and it took me may be a couple of hours. Actually, picking the library was the more painful part, and this is a problem with Rust IMO, because for most non-trivial new things you (at least I) typically need to dig through crates.io, research, experiment, etc. Anyway, FYI I ended up using PEST (pest.rs) if you still have a need.