From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Burton Samograd <burton@samograd.ca>
Cc: 13212-done@debbugs.gnu.org
Subject: bug#13212: 24.2.90; setf (symbol-function ...) does not set buffer local variable if present
Date: Mon, 17 Dec 2012 15:06:38 -0500 [thread overview]
Message-ID: <jwvmwxc30ph.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <kghbods37z9.fsf@CDW764-BURTONS.QFTI.COM> (Burton Samograd's message of "Mon, 17 Dec 2012 10:26:50 -0700")
tags 13212 notabug
thanks
> (make-local-variable 'cons)
> (setf (symbol-function 'cons) (lambda (x y) (+ x y)))
buffer-local variables affect only variables, not functions.
I.e. they affect symbol-value, not symbol-function. Elisp does not provide
buffer-local functions, so you have to use things like
(if (derived-mode-p 'foo-mode) ...) instead.
An alternative is:
(defvar-local my-foo-function (lambda () (some (default) behavior)))
(defun my-foo ()
(funcall my-foo-function))
-- Stefan
next prev parent reply other threads:[~2012-12-17 20:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-17 17:26 bug#13212: 24.2.90; setf (symbol-function ...) does not set buffer local variable if present Burton Samograd
2012-12-17 20:06 ` Stefan Monnier [this message]
2012-12-17 20:31 ` Burton Samograd
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