[pro] [Q] introspecting setf expanders

Didier Verna didier at lrde.epita.fr
Mon Oct 8 14:56:58 UTC 2012


Raymond Wiker <rwiker at gmail.com> 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)


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