[junek]

> It is very practical to actually have a grammar

I fully agree that you need to have a grammar for your language.

> and thus the possibility to use any language that has a perser generator.

See, this is where it falls down in my experience. You can't just feed "the grammar" straight into each generator, and you need to account for the quirks of each generator anyway. So the practical, idk, "reusability"... is much lower than it seems like it should be.

If you could actually just write your grammar once and feed it to any parser generator and have it actually work then that would be cool. I just don't think it works out that way in practice.