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

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Package: emacs; Severity: wishlist; Reported by: Elijah Gabe PĂ©rez <eg642616@HIDDEN>; dated Fri, 14 Mar 2025 05:43:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.
Severity set to 'wishlist' from 'normal' Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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Date: Sat, 15 Mar 2025 10:33:29 +0200
Message-Id: <86y0x6y9pi.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Elijah Gabe =?iso-8859-1?Q?P=E9rez?= <eg642616@HIDDEN>
In-Reply-To: <87r02za07t.fsf@HIDDEN> (message from Elijah Gabe
 =?iso-8859-1?Q?P=E9rez?= on Fri, 14 Mar 2025 13:20:06 -0600)
Subject: Re: bug#77005: 31.0.50; Add note about
 font-lock-keywords-case-fold-search usage
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> From: Elijah Gabe Pérez <eg642616@HIDDEN>
> Cc: 77005 <at> debbugs.gnu.org
> Date: Fri, 14 Mar 2025 13:20:06 -0600
> 
> Eli Zaretskii <eliz@HIDDEN> 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?
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#77005; Package emacs. Full text available.

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From: =?utf-8?Q?Elijah_Gabe_P=C3=A9rez?= <eg642616@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#77005: 31.0.50; Add note about
 font-lock-keywords-case-fold-search usage
In-Reply-To: <86frjfztww.fsf@HIDDEN>
References: <87frjgnp7i.fsf@HIDDEN> <86frjfztww.fsf@HIDDEN>
Date: Fri, 14 Mar 2025 13:20:06 -0600
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--=-=-=
Content-Type: multipart/alternative; boundary="==-=-="

--==-=-=
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Eli Zaretskii <eliz@HIDDEN> writes:

#+begin_quote
How did you see that, and where?
#+end_quote

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.

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

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.

Something like this:
#+begin_src diff
diff --git a/doc/lispref/modes.texi b/doc/lispref/modes.texi
index 768d78229aa..02e7a6f553f 100644
--- a/doc/lispref/modes.texi
+++ b/doc/lispref/modes.texi
@@ -3573,6 +3573,9 @@ Search-based Fontification
 @defvar font-lock-keywords-case-fold-search
 Non-@code{nil} means that regular expression matching for the sake of
 @code{font-lock-keywords} should be case-insensitive.
+
+@strong{Warning:} This variable is intended to be used by major modes
+and it's not recommended change it by minor modes
 @end defvar
 
 @node Customizing Keywords
#+end_src


--==-=-=
Content-Type: text/html

<p>
Eli Zaretskii &lt;eliz@HIDDEN&gt; writes:
</p>

<blockquote>
<p>
How did you see that, and where?
</p>
</blockquote>

<p>
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.
</p>

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

<blockquote>
<p>
We need to understand the issue better to reply to this question.  So
please provide more details.
</p>
</blockquote>

<p>
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.
</p>

<p>
Something like this:
</p>
<div class="org-src-container">
<pre style="color: #FCFCFA; background-color: #2D2A2E; padding: 0.5em; border-radius: 5px;" class="src src-diff"><span style="color: #78DCE8;">diff --git a/doc/lispref/modes.texi b/doc/lispref/modes.texi</span>
<span style="color: #78DCE8;">index 768d78229aa..02e7a6f553f 100644</span>
<span style="color: #78DCE8;">--- </span><span style="color: #78DCE8;">a/doc/lispref/modes.texi</span>
<span style="color: #78DCE8;">+++ </span><span style="color: #78DCE8;">b/doc/lispref/modes.texi</span>
<span style="color: #AB9DF2;">@@ -3573,6 +3573,9 @@</span><span style="color: #78DCE8;"> Search-based Fontification</span>
<span style="color: #dddddb;"> @defvar font-lock-keywords-case-fold-search</span>
<span style="color: #dddddb;"> Non-@code{nil} means that regular expression matching for the sake of</span>
<span style="color: #dddddb;"> @code{font-lock-keywords} should be case-insensitive.</span>
<span style="color: #A9DC76;">+</span>
<span style="color: #A9DC76;">+</span><span style="color: #A9DC76; background-color: #221F22;">@strong{Warning:} This variable is intended to be used by major modes</span>
<span style="color: #A9DC76;">+</span><span style="color: #A9DC76; background-color: #221F22;">and it's not recommended change it by minor modes</span>
<span style="color: #dddddb;"> @end defvar</span>

 @node Customizing Keywords
</pre>
</div>

--==-=-=--

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bug#77005; Package emacs. Full text available.

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To: Elijah Gabe =?iso-8859-1?Q?P=E9rez?= <eg642616@HIDDEN>
In-Reply-To: <87frjgnp7i.fsf@HIDDEN> (message from Elijah Gabe
 =?iso-8859-1?Q?P=E9rez?= on Thu, 13 Mar 2025 23:41:53 -0600)
Subject: Re: bug#77005: 31.0.50;
 Add note about font-lock-keywords-case-fold-search usage
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> From: Elijah Gabe Pérez <eg642616@HIDDEN>
> Date: Thu, 13 Mar 2025 23:41:53 -0600
> 
> I have seen that font-lock-keywords-case-fold-search is more preferably used by major modes than minor
> modes. 

How did you see that, and where?

> However, I have not found a note in documentation that says where to use it. 
> 
> Shouldn't a note be added to the documentation about this? 

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

Thanks.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#77005; Package emacs. Full text available.

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From: =?utf-8?Q?Elijah_Gabe_P=C3=A9rez?= <eg642616@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 31.0.50; Add note about font-lock-keywords-case-fold-search usage
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Date: Thu, 13 Mar 2025 23:41:53 -0600
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 Content preview: I have seen that font-lock-keywords-case-fold-search is more
 preferably used by major modes than minor modes. However, I have not found
 a note in documentation that says where to use it. Shouldn't a note be added
 to the documentation about this? 
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Content-Type: multipart/alternative; boundary="==-=-="

--==-=-=
Content-Type: text/plain


I have seen that font-lock-keywords-case-fold-search is more preferably
used by major modes than minor modes.

However, I have not found a note in documentation that says where to use
it.

Shouldn't a note be added to the documentation about this?



--==-=-=
Content-Type: text/html

<p>
I have seen that font-lock-keywords-case-fold-search is more preferably
used by major modes than minor modes.
</p>

<p>
However, I have not found a note in documentation that says where to use
it.
</p>

<p>
Shouldn't a note be added to the documentation about this?
</p>

--==-=-=--

--=-=-=
Content-Type: text/plain



-- 
                              - E.G via GNU Emacs and Org.

--=-=-=--
Acknowledgement sent to Elijah Gabe PĂ©rez <eg642616@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#77005; Package emacs. Full text available.
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