Hrvoje> David Bakhash <cadet(a)bu.edu&gt; writes: Hrvoje> Ben (?) tried to implement CL-type arithmetic comparisons (<, > etc.) Hrvoje> but failed because it would require changes to the byte-compiler. See Hrvoje> the comment in src/fns.c. That was me. I thought I could implement this in half an hour, but it turned out to be more difficult. A general solution might involve a macro. It's essential that 2-argument forms of the arithmetic functions pay no performance penalty. If macros are used to implement multi-arg functions, they need to be defined very early, and should be clever about the nature of the args. For example, (= x y z) => (and (=2 x y) (=2 y z)) (where =2 is the ordinary 2-arg operator) while for more complex args, we need to introduce temp vars (= (foo x) (foo y) (foo z)) => (let ((tmp1 (foo x)) (tmp2 (foo y))) (and (=2 tmp1 tmp2) (let ((tmp3 (foo z))) (=2 (tmp2 tmp3))))) This problem has been solved many times before. Maybe we could steal someone else's implementation instead of reinventing the wheel. Anyways, it's still on my TODO list. Martin