Re: key-val label style

OK, I got the problem: when I define these tcolorbox environments in the document, all works after I do two things

1) C-c C-n

2) reftex-parse-all

But when I put the definitions into a separate latex style file, neither reftex nor auctex knows about them and the above two steps won't help.

I am attaching the following file tcbcolor_test.tex . This one works after I open it in Emacs and do 1) and 2) above.

\documentclass{article}
\usepackage[theorems]{tcolorbox}
\usepackage{cleveref}

\newtcbtheorem[
crefname={definition}{definitions}
]
{defn}{Definition}{}{defn}

%theorem
\newtcbtheorem[
use counter from=defn,
crefname={theorem}{theorems}
]
{thm}{Theorem}{}{thm}

%\usepackage{my}

\begin{document}
\begin{thm}[label={thm:1}]{Big One}{}
$1=2$
\end{thm}
\begin{defn}[label={defn:1}]{Bigdef}{}
BIG.
\end{defn}

In \cref{defn:1,thm:1}.
\end{document}

But if I put the preamble into my.sty, so I have this tcbcolor_test1.tex

\documentclass{article}

\usepackage{my}

\begin{document}
\begin{thm}[label={thm:1}]{Big One}{}
$1=2$
\end{thm}
\begin{defn}[label={defn:1}]{Bigdef}{}
BIG.
\end{defn}

In \cref{defn:1,thm:1}.
\end{document}

Then AUCTeX won't know about these thm and defn environments and reftex won't offer them when I do C-c ).

On Fri, Sep 18, 2020 at 5:05 PM Wierdl Máté <wierdlmate@gmail.com> wrote:

Well, it all worked once. When I closed the latex file and later this afternoon reopened it in Emacs, it didn't see the key-val labels and auctex wouldn't enter my theoremlike environments with key-val labels.

I'll make up a small working example and I'll send my .emacs file.

Máté

On Fri, Sep 18, 2020 at 10:56 AM Wierdl Máté <wierdlmate@gmail.com> wrote:
I think at stackexchange the file you gave was the same. The possible difference hence is the installation of the newer auctex?

On Fri, Sep 18, 2020 at 10:48 AM Wierdl Máté <wierdlmate@gmail.com> wrote:
Arash,

This is fantastic. I installed the new auctex via elpa and your style file, and now when I enter a tcolorbox environment, I get the keyval labels added automatically. I also see the references when I do C-c ).

I'll report back if I see any bugs but I am happy!

The answer you gave me a while back in stack exchange was only partially working, but now this is all good. Maybe you want to update there?

https://tex.stackexchange.com/questions/463855/auctex-reftex-how-do-i-handle-labels-that-use-label-name-syntax-instead-of

Thx, bro,

Máté

On Fri, Sep 18, 2020 at 5:17 AM Arash Esbati <arash@gnu.org> wrote:
Hi Máté,

Wierdl Máté <wierdlmate@gmail.com> writes:

> I am using the tcolorbox latex package which doesn't use the usual '\label'
> command. Instead, one has to specify a label in key-val form as in
>
> \begin{thm}[label={thm:1}]{}{}
> $1=2/2$
> \end{thm}
>
> Is there a way to have reftex/auctex work with this variation?

AUCTeX/RefTeX were designed for vanilla LaTeX. Additional packages are
supported via style files (within AUCTeX) and customization in RefTeX.
key-val labels are possible, but with some limitations (see below).

> What I mean is this
>
> 1) reftex keeps track of these as labels and when I want to reference this
> theorem, 'C-c )' will show this to me.

You can add your environment to `reftex-label-regexps' in order to tell
RefTeX about `thm'. But the regexp is somewhat complicated.

> (Until today, this was working fine, but now reftex doesn't recognize
> this form of a label. I have no idea what happened, what's changed. )

Which version of Emacs are you using? Have you updated to 27.1?
RefTeX's handling of key-val labels was changed there.

> 2) auctex/reftex enters a label in this key-val form when I do 'C-c ('.

You can teach AUCTeX to insert a key-val label when you insert the
environment with `C-c C-e ENV RET'; hitting `C-c (' in an environment
doesn't work.

> 3) the "renumber simple labels" function works with such references.

This is indeed a missing feature in RefTeX. I never really looked how
RefTeX does this, hence I can't help.

Long time ago, I started writing a support file for tcolorbox's theorems
library. That unfinished work is attached. Set the variable
`TeX-style-private' to a directory of your choice, e.g.:

(setq TeX-style-private
(expand-file-name "~/.emacs.d/auctex-style"))

save the file there and open your .tex file. Also hit `C-c C-n' to
parse your document. Maybe you can report back if it works.

Best, Arash

From:	Wierdl Máté
Subject:	Re: key-val label style
Date:	Fri, 18 Sep 2020 18:37:03 -0500