If I understand correctly, that's just like Common Lisp's way to specify cyclic references. http://www.lispworks.com/documentation/HyperSpec/Body/02_dhp.htm ht

If I understand correctly, that's just like Common Lisp's way to specify cyclic references. http://www.lispworks.com/documentation/HyperSpec/Body/02_dhp.htm http://www.lispworks.com/documentation/HyperSpec/Body/02_dhp...