From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <n.goaziou@gmail.com>
Subject: Re: Org mode and "shunt" exporters?
Date: Mon, 09 Dec 2013 20:55:17 +0100
Message-ID: <87k3fdu7dm.fsf@gmail.com>
References: <ir4pppbm46i.fsf@lycastus.phy.bnl.gov> <87zjoe7mf2.fsf@gmail.com>
	<ir4bo0prkkc.fsf@lycastus.phy.bnl.gov>
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 ([2001:4830:134:3::10]:37756)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <n.goaziou@gmail.com>) id 1Vq6vH-0005x7-Lk
	for emacs-orgmode@gnu.org; Mon, 09 Dec 2013 14:55:25 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <n.goaziou@gmail.com>) id 1Vq6vB-0003I1-TQ
	for emacs-orgmode@gnu.org; Mon, 09 Dec 2013 14:55:19 -0500
Received: from mail-we0-x232.google.com ([2a00:1450:400c:c03::232]:54779)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <n.goaziou@gmail.com>) id 1Vq6vB-0003Hn-NB
	for emacs-orgmode@gnu.org; Mon, 09 Dec 2013 14:55:13 -0500
Received: by mail-we0-f178.google.com with SMTP id u57so4033495wes.9
	for <emacs-orgmode@gnu.org>; Mon, 09 Dec 2013 11:55:11 -0800 (PST)
In-Reply-To: <ir4bo0prkkc.fsf@lycastus.phy.bnl.gov> (Brett Viren's message of
	"Mon, 09 Dec 2013 12:38:43 -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: <http://lists.gnu.org/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: Brett Viren <bv@bnl.gov>
Cc: emacs-orgmode@gnu.org, Eric Schulte <schulte.eric@gmail.com>

Hello,

Brett Viren <bv@bnl.gov> writes:

> Eric Schulte <schulte.eric@gmail.com> writes:
>
>> You can use `org-element-parse-buffer' to convert an Emacs Buffer to a
>> structured Emacs Lisp object.  At that point you can use existing tools
>> for converting lisp to JSON or YAML.  I've used cl-json for Common Lisp,
>> I would imagine something similar exists for Emacs Lisp.
>
> Thanks for the suggestion.  I pursued that a bit this weekend.  The
> resulting data structure is a Circular Object[1] due to the ":parent"
> references.  It seems dealing with this kind of data structure is
> somewhat uncommon (or my search-fu lacking), although I do find a recent
> reference to it on this mailing list[2].  I also found a "cust-print"[3]
> feature from Emacs 19 which has since been removed.  It shows a way to
> deal with Circular Objects.  So far it has strongly taxed my poor elisp
> skills but I plan to pursue this direction a bit more.
>
> I did try throwing a JSON parser/generator[4] at the output of
> org-element-parse-buffer but this failed due to exceeding emacs's
> recursion limits.  I think this must be from the ":parent" references
> getting recursed on forever.

You can walk the tree, e.g. with `org-element-map', and remove
all :parent references if you don't need them.


Regards,

-- 
Nicolas Goaziou