Macro: COMMON-LISP:PUSHNEW

package type clhs

Takes an object and a location holding a list. If the object is already in the list, does nothing; otherwise, conses the object onto the list. Keyword arguments are accepted as per the ADJOIN function.

Lambda list

(sb-impl::obj sb-impl::place &key sb-impl::key sb-impl::test sb-impl::test-not)