From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <n.goaziou@gmail.com>
Subject: Re: [ox-publish] handling of white space in arguments of macros,
 named arguments?
Date: Thu, 28 Mar 2013 17:22:27 +0100
Message-ID: <87ehezxzng.fsf@gmail.com>
References: <31F8FCDD-923C-402B-AD87-FEB6C8F84B12@nf.mpg.de>
	<87d2ukg66d.fsf@gmail.com> <kj0pnd$r9s$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([208.118.235.92]:41919)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <n.goaziou@gmail.com>) id 1ULFb1-0000J7-T7
	for emacs-orgmode@gnu.org; Thu, 28 Mar 2013 12:22:37 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <n.goaziou@gmail.com>) id 1ULFb0-00049t-75
	for emacs-orgmode@gnu.org; Thu, 28 Mar 2013 12:22:35 -0400
Received: from mail-wg0-f49.google.com ([74.125.82.49]:51603)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <n.goaziou@gmail.com>) id 1ULFb0-00049n-0o
	for emacs-orgmode@gnu.org; Thu, 28 Mar 2013 12:22:34 -0400
Received: by mail-wg0-f49.google.com with SMTP id e11so1648621wgh.4
	for <emacs-orgmode@gnu.org>; Thu, 28 Mar 2013 09:22:33 -0700 (PDT)
In-Reply-To: <kj0pnd$r9s$1@ger.gmane.org> (Achim Gratz's message of "Thu, 28
	Mar 2013 07:59:38 +0100")
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: Achim Gratz <Stromeko@Nexgo.DE>
Cc: emacs-orgmode@gnu.org

Hello,

Achim Gratz <Stromeko@Nexgo.DE> writes:

> Am 27.03.2013 17:26, schrieb Nicolas Goaziou:
>> I think all newline characters should be replaced with a whitespace
>> character in macro arguments. Indeed, macro templates are only one line
>> long but unwanted "\n" could be inserted by paragraph filling in
>> arguments.
>
> I'm not sure about that, it would mean that there'd need to be
> additional syntax to insert linebreaks.

My point is that macro templates have to fit in a single line, no
newline character allowed. As a consequence, macro arguments are
implicitly expected to fit in a single line. So a newline character in
an argument is probably wrong.

>> I also don't mind trimming arguments again, provided this is added as an
>> explicit behaviour and there is no opposition to it.
>
> How about making trimming explicit during the expansion of macro
> arguments?  It seems that there are a few possibilities of what
> trimming could mean, so this would be an opportunity to allow them all
> (n is the argument number):
>
> $:n  - remove whitespace and linebreaks before argument
> $.n  - remove whitespace and linebreaks after argument
> $n   - same as $:.n
> $+n  - replace whitespace and linebreaks inside arguments
>        with a single space
> $*n  - same as $:+.n
> $~n  - literal argument (no trimming)

The current trend for macros is to be really simple so that advanced
(and not-so advanced) tasks are done with Babel instead. IOW, macros are
only useful if they are simpler than the simplest form of Babel usage.
In every other case, Babel is a superior choice.

Your suggestion is interesting, but I think it would go backwards wrt
this.


Regards,

-- 
Nicolas Goaziou