Is there a way to validate .pest grammars?

[matthew-dean]

I've worked a bit with other parser generators (parsers that operate from a PEG-style grammar), and typically there's a CLI tool that can catch / point out errors in the grammar. Is the only way to test a grammar to just try it and see if Rust compilation breaks? I notice that even the editor at pest.rs will throw unhelpful "unreachable" errors if something is wrong.

[RXminuS]

I think this is definitely one of the shortcomings right now. We basically develop our grammars on https://pest.rs/#editor which has led to some big frustrations when we accidentally navigate away from the page and all our hard work has vanished.
I have a half-arsed project somewhere to make a better stand-alone online editor (like regex-101) but there were too many moving bits with wasm etc from the landing page that I gave up on it for now as I simply didn't have the time...but definitely think this is something we should address sooner rather than later and would love to sponsor if someone feels like picking it up.

[kiranshila]

I'm using pest-mode in emacs and it works beautifully. Having a test repl with the ast next to it is brilliant. I can't imagine trying to iterate on grammar without it.