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From: Juri Linkov <juri@linkov.net>
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Subject: Re: outline-minor-mode integration into the new treesitter based
 major modes
Date: Fri, 23 Dec 2022 09:04:14 +0200
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To: Yilkal Argaw <yilkalargawworkneh@gmail.com>
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> I was experimenting with implementing a treesitter based mode for VHDL and
> I wanted to have a proper folding mechanism for the mode. Since I like
> outline for folding I was wondering if there is a way to integrate it with
> the syntax parsing. Asking here if it can be done and how I might go about
> doing it?

That would be great.  And now this is possible to do by using the new
function 'outline-search-function'.  You can set it to a function
that uses treesitter to find the next outlines.