From: Ivan Kanis <ivan.kanis@googlemail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs help <help-gnu-emacs@gnu.org>
Subject: defining a setter function with gv.el
Date: Mon, 27 Aug 2012 07:56:12 +0200 [thread overview]
Message-ID: <87ehmsyj2b.fsf@googlemail.com> (raw)
Stefan,
I am very new to setf. I would like to write a function that provides a
place for setf to work on an alist. It would be wonderful if the
function also worked as a getter.
(setq foo '((oak . tree)))
(defun my-function (&optional value)
(if value
(?)
(cdr (assoc 'oak tree))))
(my-function) => tree
(my-function 'shrub)
foo => '((oak . shrub))
gv.el seems to have what I need to implement the setf portion. It
doesn't provide example and I couldn't find doc in the elisp info.
Could you, pleas, help me?
Take care,
--
Ivan Kanis
http://ivan.kanis.fr
Success is counted sweetest
By those who ne'er succeed.
To comprehend a nectar
Requires sorest need.
-- Emily Dickinson
next reply other threads:[~2012-08-27 5:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-27 5:56 Ivan Kanis [this message]
2012-08-27 12:54 ` defining a setter function with gv.el Stefan Monnier
2012-08-27 18:10 ` Ivan Kanis
2012-08-27 20:28 ` Stefan Monnier
2012-08-30 16:05 ` Ivan Kanis
2012-08-31 0:59 ` Stefan Monnier
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