From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#12854: 24.2.50; `display-buffer-alist': conditions are not handled as documented Date: Sat, 10 Nov 2012 20:18:36 +0100 Message-ID: <87a9upp8qb.fsf@web.de> Reply-To: michael_heerdegen@web.de NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1352575138 31926 80.91.229.3 (10 Nov 2012 19:18:58 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 10 Nov 2012 19:18:58 +0000 (UTC) To: 12854@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Nov 10 20:19:06 2012 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TXGaA-0008Dd-JK for geb-bug-gnu-emacs@m.gmane.org; Sat, 10 Nov 2012 20:19:06 +0100 Original-Received: from localhost ([::1]:43544 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TXGa0-00086D-UY for geb-bug-gnu-emacs@m.gmane.org; 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Sat, 10 Nov 2012 14:18:13 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TXGZD-0003bs-CY for bug-gnu-emacs@gnu.org; Sat, 10 Nov 2012 14:18:10 -0500 Original-Received: from mout.web.de ([212.227.17.12]:49294) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TXGZD-0003bX-1x for bug-gnu-emacs@gnu.org; Sat, 10 Nov 2012 14:18:07 -0500 Original-Received: from drachen.dragon ([89.204.137.109]) by smtp.web.de (mrweb103) with ESMTPSA (Nemesis) id 0MZDTE-1Tld5M3tZE-00LTwa for ; Sat, 10 Nov 2012 20:18:05 +0100 X-Provags-ID: V02:K0:t1ocTk8M9N2H/adhtXSVbwY86WweFY7EohGjIc0eiCw GhRA9IuKxDjQZhpSQhiwQfBFsrae/0hwcz/tGlZLUQZW7Z59H8 hSW0svbQ0npLmHeSJtefn61aLMpobLbiOcHb98OcMMO50rOD1J 9wZqQjwWctpGnyinflosBi+e73iDdF2fE9tXiOhX01YeSEFv/Z a+pb15iOInNxutlqyEbZITDxarYdU+SPacsCznbcNk= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Spam-Score: -3.4 (---) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-Spam-Score: -3.4 (---) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:66738 Archived-At: Hi, The doc says: > display-buffer-alist is a variable defined in `window.el'. > [...] > > Alist of conditional actions for `display-buffer'. > This is a list of elements (CONDITION . ACTION), where: > > CONDITION is either a regexp matching buffer names, or a function > that takes a buffer and returns a boolean. But the CONDITION is handled very differently by `display-buffer-assq-regexp': (defun display-buffer-assq-regexp (buffer-name alist) "Retrieve ALIST entry corresponding to BUFFER-NAME." (catch 'match (dolist (entry alist) (let ((key (car entry))) (when (or (and (stringp key) (string-match-p key buffer-name)) (and (symbolp key) (functionp key) (funcall key buffer-name alist))) (throw 'match (cdr entry))))))) Obviously, two things are wrong here: (1) If CONDITION is a function, it currently must be a symbol. I don't see why lambda expressions should be forbidden. The user should not need to use defun only to be able specify an argument. (2) If CONDITION is a function, it takes _two_ arguments: a buffer _name_ (not a buffer) _and_ an alist. That should be clarified in the docstring. Regards, Michael. In GNU Emacs 24.2.50.1 (x86_64-pc-linux-gnu, GTK+ Version 3.4.2) of 2012-11-01 on dex, modified by Debian (emacs-snapshot package, version 2:20121101-1) Windowing system distributor `The X.Org Foundation', version 11.0.10707000 System Description: Debian GNU/Linux testing (wheezy)