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Circular lists/shared structures in org-element parse-tree
From: |
Thorsten Jolitz |
Subject: |
Circular lists/shared structures in org-element parse-tree |
Date: |
Fri, 28 Jun 2013 22:28:57 +0200 |
User-agent: |
Gnus/5.130002 (Ma Gnus v0.2) Emacs/24.3 (gnu/linux) |
[Originally posted on the Org-mode mailing list, but I post it here too
since it is more an elisp oriented mailing list]
Hi List,
I wonder how I can find out in a (elisp) program the points in the parse
tree (returned by org-element-parse-buffer) where shared structures are
used.
In the read-syntax, its easy to see (especially with `print-circle' set
to non-nil):
#+begin_src emacs-lisp
#2=(org-data nil #1=(headline (:raw-value "header 1"
[...] :parent #2#) [...]
#+end_src
but when processing the parse tree as a list in elisp, how can I detect the
fact that
,------------
| :parent #2#
`------------
refers to
,-----------------
| #2=(org-data nil
`-----------------
i.e. points back to an already existing structure?
--
cheers,
Thorsten
- Circular lists/shared structures in org-element parse-tree,
Thorsten Jolitz <=