GNU bug report logs - #76781
Fontification of expl3 code

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Message #11 received at 76781 <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: Ikumi Keita <ikumi <at> ikumi.que.jp>
Cc: 76781 <at> debbugs.gnu.org
Subject: Re: bug#76781: Fontification of expl3 code
Date: Fri, 07 Mar 2025 09:02:33 +0100

[Message part 1 (text/plain, inline)]

Hi Keita,

Ikumi Keita <ikumi <at> ikumi.que.jp> writes:

> Well, I don't notice any difference between the two images. I actually
> applied the proposed patch and opened the sample .dtx file, but it still
> doesn't exhibit differences to my eyes. Am I missing some subtle
> changes?

Thanks for looking at this.  Let me magnify the picture for you ;-)
Compare the ':nn':

[before1.png (image/png, inline)]

[after1.png (image/png, inline)]

[Message part 4 (text/plain, inline)]

or the '\cs' in these two:

[before2.png (image/png, inline)]

[after2.png (image/png, inline)]

[Message part 7 (text/plain, inline)]

> 1. What is the point to reset `font-lock-major-mode'? Isn't this
>    `font-lock-set-defaults'?
> 2. Why do we need to tell font-lock to update its internals? No other
>    style files do that.

I think the issue is that `font-lock' doesn't recognize the syntax
change for : and _ while the style is loaded.  I admit I'm not familiar
enough with the internals of `font-lock' to tell, but from trying, I had
to look at the internals of `font-lock-debug-fontify' and found out that
setting `font-lock-major-mode' to nil was needed.

Do you get other results if you apply the patch and comment out that
form?

Best, Arash

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