Eli Zaretskii <eliz@gnu.org> writes:

From: Elijah Gabe Pérez <eg642616@gmail.com> Cc: 77005@debbugs.gnu.org Date: Fri, 14 Mar 2025 13:20:06 -0600

Eli Zaretskii <eliz@gnu.org> writes:

How did you see that, and where?

Mostly in third-party major-mode. But also in built-in ones, for example css-mode that have font-lock-keywords-case-fold-search set to 't.

I haven't seen any minor mode that uses this variable. I guess the reason is to avoid conflicts with the major mode.

We need to understand the issue better to reply to this question. So please provide more details.

My idea is to add a kind of note to font-lock-keywords-case-fold-search documentation in lispref tex file to avoid any confusion that this can be used in minor modes.

I wonder why is this necessary. Minor modes are not supposed to affect font-lock in the first place, are they?

Right, they should not, however for case-insensitive fontification this can lead to newcomer users that wants to define a minor mode (such as for highlight something) use this variable.

Otherwise this bug could already be closed.