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From: Eric Abrahamsen <eric@ericabrahamsen.net>
To: help-gnu-emacs@gnu.org
Subject: buffer-local-value confusion
Date: Wed, 08 Oct 2014 14:13:45 +0800	[thread overview]
Message-ID: <87k34bxf52.fsf@ericabrahamsen.net> (raw)

I have defined a buffer-local variable like this:

(defvar nngnorb-attachment-file-list nil)
(make-variable-buffer-local 'nngnorb-attachment-file-list)

I'm first setting a value for it in the buffer referred to by
nnir-tmp-buffer, then trying to copy that buffer-local value to a
different buffer. Here's what I'm seeing, which confuses me:

(with-current-buffer (get-buffer nnir-tmp-buffer)
  nngnorb-attachment-file-list) --> proper, populated value

(buffer-local-value
 nngnorb-attachment-file-list
 (get-buffer nnir-tmp-buffer)) --> nil

I thought this was the whole point of buffer-local-value? Am I doing it
wrong?

On the other hand, using with-current-buffer is almost precisely the
same number of characters as buffer-local-value, so maybe there's no
point in insisting on the latter...

Eric




             reply	other threads:[~2014-10-08  6:13 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-08  6:13 Eric Abrahamsen [this message]
2014-10-08  7:29 ` buffer-local-value confusion Thorsten Jolitz
     [not found] <mailman.10699.1412748865.1147.help-gnu-emacs@gnu.org>
2014-10-08  7:27 ` Marco Wahl
2014-10-08  7:34   ` Eric Abrahamsen

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