I'm sorry, I don't know that much about it. I don't think there are any separate implementation of it. I'd guess that as long you have call/cc you could do it,

I'm sorry, I don't know that much about it. I don't think there are any separate implementation of it. I'd guess that as long you have call/cc you could do it, but Racket has its own specific macro system (syntax-parse, but syntax-rules and syntax-case are supported), and I don't know how much of the racket/base is built on syntax-parse; or, on the other hand, how syntax-parse is itself implemented and if it would be possible to port easily to other Schemes. The good news are that once you have racket/base, most other things in stdlib should work.