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Re: Turing on tree-sitter (was: Call for volunteers: add tree-sitter sup

From: Yuan Fu
Subject: Re: Turing on tree-sitter (was: Call for volunteers: add tree-sitter support to major modes)
Date: Sun, 9 Oct 2022 23:54:45 -0700

> On Oct 9, 2022, at 11:46 PM, Theodor Thornhill <theo@thornhill.no> wrote:
> Eli Zaretskii <eliz@gnu.org> writes:
>>> Date: Sun, 09 Oct 2022 16:25:17 +0300
>>> From: Eli Zaretskii <eliz@gnu.org>
>>> Cc: emacs-devel@gnu.org, casouri@gmail.com
>>>> From: Philip Kaludercic <philipk@posteo.net>
>>>> Cc: emacs-devel@gnu.org, Yuan Fu <casouri@gmail.com>
>>>> Date: Sun, 09 Oct 2022 12:26:09 +0000
>>>> One more thing, it looks like the usage of tree-sitter is enabled for
>>>> python by toggling `python-use-tree-sitter'.  Will every mode now have
>>>> this kind of an option?  I would hope not...
>>> That's a separate discussion, so please start a new thread.
>> So here I am, starting that separate discussion.
>> Since tree-sitter support is per-language, I do think it makes sense
>> for each mode to have its tree-sitter support turned on separately.
>> But we could also have a global "turn on tree-sitter support in every
>> mode that has it" option, which will turn this on for those modes
>> which can be supported by tree-sitter, if the appropriate
>> language-support library is installed.
>> Comments?
> +1 for this, but also keep the per-modes customs.  Then we can eat the
> cake and have it too.
> Such a mechanism can be made later, I think?
> Theo

+1 for this, but also add a third possible value to per-mode customs that keeps 
tree-sitter always off for the mode. That way someone can enable tree-sitter 
for all but that mode. Are there precedents for such ternary variables? nil, t, 
and 'never?


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