There’s not a book on x in this case, which is why I said what I said. A language is more than just a reader and expander for toy languages. It also includes d

There’s not a book on x in this case, which is why I said what I said. A language is more than just a reader and expander for toy languages. It also includes domain specific editor functionality and domain specific errors, among other things (like understanding macros and phases at a deeper level).