Just guessing: If you see that the writer form is a funcall to a setf function, you can then check with fboundp if such a function actually exists. This is probably a bit shaky, but maybe good enough for practical purposes?
Pascal On 8 Oct 2012, at 16:56, Didier Verna <[email protected]> wrote: > Raymond Wiker <[email protected]> wrote: > >> #'get-setf-expansion, perhaps? > > Nope, because it gives you something by default. > > CL-USER> (get-setf-expansion '(not-previously-defined)) > NIL > NIL > (#:NEW886) > (FUNCALL #'(SETF NOT-PREVIOUSLY-DEFINED) #:NEW886) > (NOT-PREVIOUSLY-DEFINED) > > > -- > Resistance is futile. You will be jazzimilated. > > Scientific site: http://www.lrde.epita.fr/~didier > Music (Jazz) site: http://www.didierverna.com > > _______________________________________________ > pro mailing list > [email protected] > http://lists.common-lisp.net/cgi-bin/mailman/listinfo/pro -- Pascal Costanza _______________________________________________ pro mailing list [email protected] http://lists.common-lisp.net/cgi-bin/mailman/listinfo/pro
