I don't particularly care for the fact that theAssociativity enum lives outside of theParsers trait, but I don't see a way to include it because of the binary compatibility constraints. It might be there's a simple solution and I'd be happy to find out about it.

I'm still not seeing the same results when I runsbt test locally as the CI pipeline is showing. I've rebased on the newmain (as this code is completely orthogonal to the changes there) and addressed the error I saw in the tests. I'll push again if I see more errors. Sorry about the commit spam; I don't know how to reproduce the same errors locally.