That's true about the nested structures. I was wondering if it is worthwhile to make lexing and parsing first class and changeable at runtime, and whether rege

That's true about the nested structures. I was wondering if it is worthwhile to make lexing and parsing first class and changeable at runtime, and whether regexps would be a good way of doing this. The problem with relying on an external program is that making syntax conversion first class gets much more convoluted. But, it isn't clear to me whether it is a good idea to make everything about LOP first class. I do like that feature of Lisp though.