Add Common Lisp's #'complement to cl-extra.el. 2010-06-02 Aidan Kehoe <kehoea@parhasard.net> * cl-macs.el (complement): * cl-extra.el (complement): Add an implementation and a compiler macro for #'complement, as specified by CL. For discussion; the compiler macro may be a little too aggressive about taking the compile time argument lists of the functions it is inverting.