can't you explicitly express a catch-all in a check?
edit: I don't know rust. in other languages he's such catch all patterns exist and you have to either capture each possible value explicitly or you express "here in this fu, I take care of these and all others I do that..."
edit: I don't know rust. in other languages he's such catch all patterns exist and you have to either capture each possible value explicitly or you express "here in this fu, I take care of these and all others I do that..."