From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rick Frankel <rick@rickster.com>
Subject: Re: [PATCH] Process hlines in imported tables
Date: Fri, 29 Mar 2013 17:42:38 -0400
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References: <20130329014615.GA49671@BigDog.local>
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To: Eric Schulte <schulte.eric@gmail.com>
Cc: emacs-orgmode@gnu.org

On Fri, Mar 29, 2013 at 09:04:42AM -0600, Eric Schulte wrote:
> Rick Frankel <rick@rickster.com> writes:
> 
> Users may want to insert a "-" in their tables, and I think it would be
> surprising to magically replace floating "-" characters with hlines.
> There are numerous existing options for inserting hlines into tables,
> e.g., the :colnames header argument, using the raw, wrap and org result
> types and printing literal Org-mode syntax from your block, additionally
> any result could be passed through an elisp code block which may insert
> hline symbols at will.
> 
> Is there a specific use case which isn't addressed by the existing
> functionality?

Yes and no. :colnames works, but often the header comes from the
processing, so they may not be static (I use a lot of call:s). Also,
I've been having trouble using the output from raw results as input --
it seems that unless the results are cached (:cache yes), the table is
not parsed on input, but passed as a multiline string. I was hoping to
avoid this problem using value returns (now that  Achim has made the
perl parsing work better). Here's an example (btw, this breaks in 7.4
as well):

* Cache vs. uncached raw
#+name: uncached
#+begin_src elisp :results raw
  "|c1|c2|
  |-
  |a|1|
  |b|2|"
#+end_src

#+call: uncached()

#+results: uncached()
: |c1|c2|
: |-
: |a|1|
: |b|2|


#+name: cached
#+begin_src elisp :results raw :cache yes
  "|c1|c2|
  |-
  |a|1|
  |b|2|"
#+end_src

#+results[62ca3004bf7cb363e47635216b3289cfdc39684c]: cached
| c1 | c2 |
|----+----|
| a  |  1 |
| b  |  2 |

#+call: cached()

#+results: cached()
| a | 1 |
| b | 2 |