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From: Nicolas Goaziou <n.goaziou@gmail.com>
To: "François Pinard" <pinard@iro.umontreal.ca>
Cc: emacs-orgmode@gnu.org
Subject: Re: Macros [was: Re: ATTR_HTML for a clickable image, howto?]
Date: Sun, 20 May 2012 10:02:05 +0200	[thread overview]
Message-ID: <87txzbcmbm.fsf@gmail.com> (raw)
In-Reply-To: <86r4ufr7hx.fsf_-_@mercure.progiciels-bpi.ca> ("François Pinard"'s message of "Sat, 19 May 2012 21:00:58 -0400")

Hello,

François Pinard <pinard@iro.umontreal.ca> writes:

> The examples in the manual do not hint either about whether newlines
> are allowed or not in macro arguments.

They are not.

> In fact, the manual section "Macro replacement" says very little, so
> when I initially read it, I guessed that macros are only usable in very
> simple cases.  However, the last statement says that macros can be used
> to construct "complex HTML code".  Yet, the definition method at the
> beginning suggests that macro definitions have to fit on one line, and
> this seriously limits the complexity of what we can do with them.  So,
> on initial reading, I just decided I understood nothing about
> them :-).

They can build complex code since you can eval a sexp in a macro:

--8<---------------cut here---------------start------------->8---
#+TITLE: Macro test
#+MACRO: test2 recursive $1
#+MACRO: test A {{{test2(inner)}}} macro, $1.
#+MACRO: html-builder (eval (+ $1 $2))


{{{test(and an outer one)}}}

Some complex macro {{{html-builder(1,2)}}}.
--8<---------------cut here---------------end--------------->8---

> If macros are there to stay in Org, it might be worth documenting a more
> complete specification about how to define and use them.

They are useful. Though, for "complex code", I think Babel should be the
way to go.


Regards,

-- 
Nicolas Goaziou

  reply	other threads:[~2012-05-20  8:05 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-01 21:27 ATTR_HTML for a clickable image, howto? François Pinard
2012-04-02  8:14 ` Bastien
2012-04-02 10:34   ` Christian Moe
2012-04-02 15:06     ` Bastien
2012-04-02 21:30       ` Samuel Wales
2012-04-03  5:42         ` Bastien
2012-04-05 23:34           ` Samuel Wales
2012-04-05 15:02   ` François Pinard
2012-04-06  8:52     ` Christian Moe
2012-04-06  9:29       ` Christian Moe
2012-04-06 18:41       ` Samuel Wales
2012-04-06 18:45         ` Samuel Wales
2012-04-07 13:15         ` Christian Moe
2012-04-10 23:53           ` Samuel Wales
2012-04-11  8:11             ` Christian Moe
2012-05-12  0:43               ` Samuel Wales
2012-05-20  1:00               ` Macros [was: Re: ATTR_HTML for a clickable image, howto?] François Pinard
2012-05-20  8:02                 ` Nicolas Goaziou [this message]
2012-05-20  8:34                   ` Yagnesh Raghava Yakkala
2012-05-20 10:24                     ` Nicolas Goaziou
2012-05-22 23:23                 ` Bastien
2012-07-05 14:40                 ` Bastien
2012-07-05 15:09                   ` Nicolas Goaziou
2012-07-05 15:51                     ` Sebastien Vauban
2012-07-05 20:44                       ` Nicolas Goaziou
2012-08-05  9:19                     ` Bastien
2012-05-20  0:39           ` ATTR_HTML for a clickable image, howto? François Pinard
2012-04-06  9:02     ` Bastien

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