GNU bug report logs - #77005
31.0.50; Add note about font-lock-keywords-case-fold-search usage

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From: Elijah Gabe Pérez <eg642616 <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 77005 <at> debbugs.gnu.org
Subject: bug#77005: 31.0.50; Add note about font-lock-keywords-case-fold-search usage
Date: Sat, 15 Mar 2025 12:57:45 -0600

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Eli Zaretskii <eliz <at> gnu.org> writes:

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

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