Re: Modifying the parse tree

[Ihor Radchenko <yantar92@posteo.net>]

bvchgvbt@mail.com writes:

> After calling, say, org-element-adopt-elements, do I (or rather my code)
> have to do anything to make the modified tree apply to the Org document/
> buffer that the tree came from?

Yes. Parse tree is not kept in sync with the original buffer when you
retrieve it by `org-element-parse-buffer'. We generally do not currently
have a way to modify Org buffer text from AST.

The only way to write the parse tree back is
replacing it with the output `org-element-interpret-data'. But be aware
that interpreted tree and the original text do not have exact 1-to-1
equivalence. Some whitespace might be lost.

> I can see that the tree is modified but it isn't reflected in the buffer
> it came from, and furthermore calling org-element-interpret-data on the
> modified tree at that stage results in an error:
>
> "org-element-headline-interpreter: Wrong type argument: wholenump, nil"

Which implies that you added invalid headline element to the tree.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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