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Re: Tree-sitter and major mode inheritance

From: Dmitry Gutov
Subject: Re: Tree-sitter and major mode inheritance
Date: Sun, 20 Nov 2022 17:24:59 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.2

On 20.11.2022 16:49, Eli Zaretskii wrote:
Date: Sun, 20 Nov 2022 15:22:40 +0200
Cc: casouri@gmail.com, emacs-devel@gnu.org, monnier@iro.umontreal.ca,
From: Dmitry Gutov <dgutov@yandex.ru>

This is a
fragile assumption, so code which is based on it is broken and should be

Okay then, but then we'll need to learn another way to ask that

I guess.  I admit I didn't know derived-mode-p was being used for such

Would it make sense to use alternatives, as in

   (or (derived-mode-p 'js-mode)
       (derived-mode-p 'js-ts-mode))


Those kind of lists are going to be inherently non-exhaustive.

Or maybe we should add a new predicate, which will take a LANGUAGE argument,
and use some database of known modes internally to call derived-mode-p as

Some kind of new registry could be the answer, but it would be nice to manage using the existing tools/variables somehow.

Stefan has touched on this issue in https://debbugs.gnu.org/58075

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