GNU bug report logs - #79587
Fontification: Numbers directly after a macro

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: "auctex-bugs" <bug-auctex <at> gnu.org>
Subject: Fontification: Numbers directly after a macro
Date: Mon, 06 Oct 2025 23:14:26 +0200

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

X-Debbugs-CC: tsdh <at> gnu.org

Hi all,

currently, \LaTeX3 is fontified like this:

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

[Message part 3 (text/plain, inline)]

i.e., the 3 after the macro kills fontification of the macro \LaTeX.

It should actually look like this:

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

[Message part 5 (text/plain, inline)]

This can be achieved with this change:

--8<---------------cut here---------------start------------->8---
diff --git a/font-latex.el b/font-latex.el
index ffba35cf..054e134c 100644
--- a/font-latex.el
+++ b/font-latex.el
@@ -1284,7 +1284,9 @@ have changed."
 (defvar font-latex-syntax-alist
   ;; Use word syntax for @ because we use \> for matching macros and
   ;; we don't want \foo <at> bar to be found if we search for \foo.
-  '((?\( . ".") (?\) . ".") (?@ . "w"))
+  '((?\( . ".") (?\) . ".") (?@ . "w")
+    (?0 . ".") (?1 . ".") (?2 . ".") (?3 . ".") (?4 . ".")
+    (?5 . ".") (?6 . ".") (?7 . ".") (?8 . ".") (?9 . "."))
   "List of specifiers for the syntax alist of `font-lock-defaults'.")

 (defun font-latex-add-to-syntax-alist (list)
--8<---------------cut here---------------end--------------->8---

The patch changes the syntax of all numbers in `font-latex-syntax-alist'
to Punctuation so they are not matched by \>.  The tests we have pass
after this change.

Any comments?

Best, Arash

Message #10 received at 79587-done <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: 79587-done <at> debbugs.gnu.org
Cc: tsdh <at> gnu.org
Subject: Re: bug#79587: Fontification: Numbers directly after a macro
Date: Fri, 24 Oct 2025 17:20:46 +0200

Arash Esbati <arash <at> gnu.org> writes:

> This can be achieved with this change:
>
> diff --git a/font-latex.el b/font-latex.el
> index ffba35cf..054e134c 100644
> --- a/font-latex.el
> +++ b/font-latex.el
> @@ -1284,7 +1284,9 @@ have changed."
>  (defvar font-latex-syntax-alist
>    ;; Use word syntax for @ because we use \> for matching macros and
>    ;; we don't want \foo <at> bar to be found if we search for \foo.
> -  '((?\( . ".") (?\) . ".") (?@ . "w"))
> +  '((?\( . ".") (?\) . ".") (?@ . "w")
> +    (?0 . ".") (?1 . ".") (?2 . ".") (?3 . ".") (?4 . ".")
> +    (?5 . ".") (?6 . ".") (?7 . ".") (?8 . ".") (?9 . "."))
>    "List of specifiers for the syntax alist of `font-lock-defaults'.")
>
>  (defun font-latex-add-to-syntax-alist (list)
>
> The patch changes the syntax of all numbers in `font-latex-syntax-alist'
> to Punctuation so they are not matched by \>.  The tests we have pass
> after this change.
>
> Any comments?

No comments, so I installed the proposed change, closing.

Best, Arash

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