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From: Charles Berry <ccberry@ucsd.edu>
To: emacs-orgmode@gnu.org
Subject: Re: macro expansion in source code
Date: Thu, 29 Aug 2013 15:15:08 +0000 (UTC)	[thread overview]
Message-ID: <loom.20130829T170757-251@post.gmane.org> (raw)
In-Reply-To: CABxYo6p41=GLDUTd8Qgc721Rc27puk2otmjwDdtuXRP3ZsHkaw@mail.gmail.com

Johannes Rainer <johannes.rainer <at> gmail.com> writes:

> 
> 
> hi,
> I was just wondering if there is a way to use macro expansion also in 
> source code blocks or headers. I tried this, but the macro was never 
> expanded, but rather the {{{image_width}}} was exported. could the 
> expansion be done by calling the macro expansion before export 
> (e.g. using a hook)?
> 
> something like this:

[snip]

I think the answer is no. But you can accomplish much the same thing with
properties and/or noweb references. Like this

* header
  :PROPERTIES:
  :image_width: 16
  :END:

#+NAME: imwide
#+HEADER: :var iw=(org-entry-get (point) "image_width")
#+BEGIN_SRC R :results value
iw
#+END_SRC

#+RESULTS: imwide
: 16


#+BEGIN_SRC R :noweb yes :results output
image.width <- 
  <<imwide()>>
image.width
#+END_SRC

#+RESULTS:
: [1] 16

next prev parent reply	other threads:[~2013-08-29 15:15 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-29 11:52 macro expansion in source code Johannes Rainer
2013-08-29 15:15 ` Charles Berry [this message]
2013-08-29 19:22   ` Johannes Rainer

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