Not really a fan of using ‘&’ as the concatenation operator instead of the traditional EBNF way. The examples show both ways with the TOKEN_SEP (? space I guess

Not really a fan of using ‘&’ as the concatenation operator instead of the traditional EBNF way. The examples show both ways with the TOKEN_SEP (? space I guess) not seeming to need it. Also the string rules look like they don’t allow an empty string, maybe intentionally as that’s probably a bug in someone’s grammar. About as far as I got on a quick glance, got distracted by the mathematical operators and other things like concatenation sharing the same tokens and started thinking how hard it would be to parse it.