Clean Lisp implementation for study?
kbob: Scheme 9 from Empty Space is both a small Scheme implementation and a book describing the source code.
I read 60% of the book this summer, and wasn't disappointed.Written in portable C, it implements bignums, garbage collection, (nonhygienic) macros, hashed environments.http://www.bcl.hamilton.ie/~nmh/t3x.org/zzz/