It isn't with a handwritten lexer/parser either, the real work starts after the parsing is complete. Of course, there are two possibilities: often changing them

It isn't with a handwritten lexer/parser either, the real work starts after the parsing is complete. Of course, there are two possibilities: often changing them can either result in a cleaner, more readable result or a _real_ mess ;) But you have to rewrite it by hand anyways if you want to get better (or usable) error messages and incremental parsing for a LSP.