From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bastien <bzg@altern.org>
Subject: Re: [HELP} trying to figure out how to figure out?
Date: Tue, 19 Jul 2011 02:05:28 +0200
Message-ID: <871uxnuoc7.fsf@gnu.org>
References: <CALRk1sa1R+sHKEDi1bbqZrMy_x3nMukKECEHV9909KUpy0iXCQ@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([140.186.70.92]:52253)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <bastienguerry@googlemail.com>) id 1QixoE-0003kQ-Tr
	for emacs-orgmode@gnu.org; Mon, 18 Jul 2011 20:05:15 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <bastienguerry@googlemail.com>) id 1QixoA-0004lR-HQ
	for emacs-orgmode@gnu.org; Mon, 18 Jul 2011 20:05:10 -0400
Received: from mail-fx0-f52.google.com ([209.85.161.52]:54226)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <bastienguerry@googlemail.com>) id 1QixoA-0004kK-8o
	for emacs-orgmode@gnu.org; Mon, 18 Jul 2011 20:05:06 -0400
Received: by fxd18 with SMTP id 18so6070435fxd.39
	for <emacs-orgmode@gnu.org>; Mon, 18 Jul 2011 17:05:05 -0700 (PDT)
In-Reply-To: <CALRk1sa1R+sHKEDi1bbqZrMy_x3nMukKECEHV9909KUpy0iXCQ@mail.gmail.com>
	(Matthew Sauer's message of "Mon, 18 Jul 2011 17:49:06 -0500")
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: </archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: Matthew Sauer <improv.philosophy@gmail.com>
Cc: Org Mode Mailing List <emacs-orgmode@gnu.org>

Hi Matthew,

(defconst ...) defines a constant, i.e. a symbol which value
will not change.

What happens here is that org.el defines org-outline-regexp
as a constant, whereas some functions use org-outline-regexp
as a symbol for a temporary value (used in let constructs).

See for example the macro `org-with-limited-levels' in org-macs.el:

#+begin_src emacs-lisp
(defmacro org-with-limited-levels (&rest body)
  "Execute BODY with limited number of outline levels."
  `(let* ((org-outline-regexp (org-get-limited-outline-regexp)))
     ,@body))
#+end_src emacs-lisp


The let* construct uses org-outline-regexp to store a temporary
value...  which 100% conflicts (!) with the idea of org-outline-regexp
being a constant.

Thanks for spotting at this!

I've just pushed this fix:

  http://orgmode.org/w/?p=org-mode.git;a=commit;h=08fc6384bcb3937d933f21d0b12c818603d8a279

PS: some compilation warnings depend on the Emacs version you use,
it's always a good idea to tell what version of Emacs you use.

-- 
 Bastien