Yeah I saw that section too. My question was more that the notes about how Custom Filetype files work say that they have a very limited set of features, and then the example uses more than the limited feature set suggested in the docs. So how limited are they actually?
I suppose either way I won't end up writing a full lexer in C++, so I'll have to use a Custom Filetype. I only work on the project this is related to about once a week, so it might not be right away.
Should I PR the custom filetype to this repo if I get something useful or is the wiki actually preferred?