From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: export code with backslashes
Date: Wed, 18 Mar 2015 10:10:24 -0700
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To: hymie@lactose.homelinux.net
Cc: emacs-orgmode@gnu.org

On Wed, 18 Mar 2015, hymie@lactose.homelinux.net wrote:

> "Charles C. Berry" writes:
>>   (defun org-export-ascii-filter-code (text back-end info)
>>   "Replace `\\n' with `\\' in ascii code."
>>     (if (eq back-end 'ascii)
>>         (replace-regexp-in-string
>>          "\n" "\\\n"
>>          (org-babel-chomp
>>           (org-export-string-as text 'ascii t))
>>          nil t)
>>       text))
>>   (add-to-list 'org-export-filter-code-functions
>>                'org-export-ascii-filter-code)
>
> Just for the record.....
>
> I had an open running emacs.  I changed my .emacs file, applied the change
> with M-x load-file .emacs , and it worked perfectly.
>
> But today, I opened emacs fresh, and was greeted with an error
>
> Symbol's value as variable is void: org-export-filter-code-functions
>
> I got the same error when I tried to M-x load-file .emacs
>
> But
>
> After I did an ascii export (in which the backslashes do not appear), I could
> then M-x load-file .emacs, no error, and the backslashes worked.
>
> I added
> (require 'ox)
> to my .emacs file, and that resolved the problem.
>

Use

#+BEGIN_SRC emacs-lisp
   (eval-after-load 'ox
     '(add-to-list
       'org-export-filter-code-functions
       'org-export-ascii-filter-code))
#+END_SRC


Chuck