GNU bug report logs - #58233
Latex style files shifts code with underscores

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

From: uzibalqa <uzibalqa <at> proton.me>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: Latex style files shifts code with underscores
Date: Sat, 01 Oct 2022 19:45:27 +0000

I am working on some latex style files and have noticed that code with underscores gets displayed
as subscript notation (characters get shifted downwards) rather than showing code as it should be.

Consequently, the following looks extremely weird.

\cs_new_protected:Nn \__hagbard_newtheorem_parent:nnn
 {
  \newtheorem{#1_inner}[#3]{\color{\l__hagbard_theorem_setcolor_tl}#2}
 }
\cs_generate_variant:Nn \__hagbard_newtheorem_parent:nnn { VVV }

Message #8 received at 58233 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: 58233 <at> debbugs.gnu.org
Subject: Re: bug#58233: Latex style files shifts code with underscores
Date: Sun, 02 Oct 2022 14:41:27 +0200

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

uzibalqa <uzibalqa <at> proton.me> writes:

> I am working on some latex style files and have noticed that code with underscores gets displayed
> as subscript notation (characters get shifted downwards) rather than showing code as it should be.
>
> Consequently, the following looks extremely weird.
>
> \cs_new_protected:Nn \__hagbard_newtheorem_parent:nnn
>  {
>   \newtheorem{#1_inner}[#3]{\color{\l__hagbard_theorem_setcolor_tl}#2}
>  }
> \cs_generate_variant:Nn \__hagbard_newtheorem_parent:nnn { VVV }

I've managed to repress all knowledge of .sty files I once had.

Emacs currently uses latex-mode to display .sty files.  In LaTeX,
underscores aren't allowed in identifiers like this, are they?

So it seems like the solution here would be to default
tex-fontify-script to nil in .sty files, which seems to fix this
specific problem.  But the fontification is still pretty weird:

[Message part 2 (image/png, inline)]

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

I.e., if this is valid .sty syntax, then latex-mode doesn't really have
support for it at all, I think?

Message #11 received at 58233 <at> debbugs.gnu.org (full text, mbox):

From: uzibalqa <uzibalqa <at> proton.me>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 58233 <at> debbugs.gnu.org
Subject: Re: bug#58233: Latex style files shifts code with underscores
Date: Sun, 02 Oct 2022 15:28:20 +0000

Sent with Proton Mail secure email.

------- Original Message -------
On Sunday, October 2nd, 2022 at 12:41 PM, Lars Ingebrigtsen <larsi <at> gnus.org> wrote:


> uzibalqa uzibalqa <at> proton.me writes:
> 
> > I am working on some latex style files and have noticed that code with underscores gets displayed
> > as subscript notation (characters get shifted downwards) rather than showing code as it should be.
> > 
> > Consequently, the following looks extremely weird.
> > 
> > \cs_new_protected:Nn \__hagbard_newtheorem_parent:nnn
> > {
> > \newtheorem{#1_inner}[#3]{\color{\l__hagbard_theorem_setcolor_tl}#2}
> > }
> > \cs_generate_variant:Nn \__hagbard_newtheorem_parent:nnn { VVV }
> 
> 
> I've managed to repress all knowledge of .sty files I once had.
> 
> Emacs currently uses latex-mode to display .sty files. In LaTeX,
> underscores aren't allowed in identifiers like this, are they?
> 
> So it seems like the solution here would be to default
> tex-fontify-script to nil in .sty files, which seems to fix this
> specific problem. But the fontification is still pretty weird:
> 
> 
> I.e., if this is valid .sty syntax, then latex-mode doesn't really have
> support for it at all, I think?

It is the latest L3 Programming Layer Interface for Latex.

Message #14 received at 58233 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: 58233 <at> debbugs.gnu.org
Subject: Re: bug#58233: Latex style files shifts code with underscores
Date: Mon, 03 Oct 2022 11:09:53 +0200

uzibalqa <uzibalqa <at> proton.me> writes:

> It is the latest L3 Programming Layer Interface for Latex.

Then I guess somebody will have to write code to support this new
language -- fixing just the subscripts doesn't seem to make much sense.

Here's a pointer to get somebody that wants to work on this started:

https://www.alanshawn.com/latex3-tutorial/#why-latex3

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