--- Begin Message ---
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Subject: |
RefTeX: Regexp for parsing labels in optional arguments |
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Date: |
Sat, 07 Jul 2018 23:11:26 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 |
Hi all,
please consider the following example:
--8<---------------cut here---------------start------------->8---
\documentclass{article}
\usepackage{listings}
\begin{document}
\begin{lstlisting}[
caption={Some caption},
label=lst:1]
Some code
\end{lstlisting}
\begin{lstlisting}[
caption={Some caption},
label=lst:2
]
Some code
\end{lstlisting}
\begin{lstlisting}[
caption = {Some caption},
label = lst:3 ]
Some code
\end{lstlisting}
\ref{lst:1}, \ref{lst:2
}, \ref{lst:3 }
\ref{lst:1}, \ref{lst:2}, \ref{lst:3}
\end{document}
--8<---------------cut here---------------end--------------->8---
With RefTeX active, it fails to parse the labels defined in optional
arguments correctly (see the first set of \ref commands). It is due to
the regex defined in `reftex-label-regexps' in `reftex-vars.el' which
expects one of ],} directly after the label. With the following patch,
it parses the labels correctly:
--8<---------------cut here---------------start------------->8---
diff --git a/lisp/textmodes/reftex-vars.el b/lisp/textmodes/reftex-vars.el
index 11dbb8d..66d800d 100644
--- a/lisp/textmodes/reftex-vars.el
+++ b/lisp/textmodes/reftex-vars.el
@@ -895,7 +895,7 @@ DOWNCASE t: Downcase words before using them."
"\\\\label{\\(?1:[^}]*\\)}"
;; keyvals [..., label = {foo}, ...] forms used by ctable,
;; listings, minted, ...
-
"\\[[^][]\\{0,2000\\}\\<label[[:space:]]*=[[:space:]]*{?\\(?1:[^],}]+\\)}?")
+ "\\[[^][]\\{0,2000\\}\\<label[[:space:]]*=[[:space:]]*{?\\(?1:[^],
\t\n\r%}]+\\)}?")
"List of regexps matching \\label definitions.
The default value matches usual \\label{...} definitions and
keyval style [..., label = {...}, ...] label definitions. It is
--8<---------------cut here---------------end--------------->8---
Any suggestion if I'm missing a character? My next step would be to add
the same regexp to `LaTeX-auto-label-regexp-list' in order to make
AUCTeX also capable of this feature. Any comments welcome.
Best, Arash
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--- Begin Message ---
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Subject: |
Re: bug#32089: RefTeX: Regexp for parsing labels in optional arguments |
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Date: |
Wed, 01 May 2019 00:01:18 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 |
> It is due to the regex defined in `reftex-label-regexps' in
> `reftex-vars.el' which expects one of ],} directly after the label.
> With the following patch, it parses the labels correctly:
>
> --8<---------------cut here---------------start------------->8---
> diff --git a/lisp/textmodes/reftex-vars.el b/lisp/textmodes/reftex-vars.el
> index 11dbb8d..66d800d 100644
> --- a/lisp/textmodes/reftex-vars.el
> +++ b/lisp/textmodes/reftex-vars.el
> @@ -895,7 +895,7 @@ DOWNCASE t: Downcase words before using them."
> "\\\\label{\\(?1:[^}]*\\)}"
> ;; keyvals [..., label = {foo}, ...] forms used by ctable,
> ;; listings, minted, ...
> -
> "\\[[^][]\\{0,2000\\}\\<label[[:space:]]*=[[:space:]]*{?\\(?1:[^],}]+\\)}?")
> + "\\[[^][]\\{0,2000\\}\\<label[[:space:]]*=[[:space:]]*{?\\(?1:[^],
> \t\n\r%}]+\\)}?")
> "List of regexps matching \\label definitions.
> The default value matches usual \\label{...} definitions and
> keyval style [..., label = {...}, ...] label definitions. It is
> --8<---------------cut here---------------end--------------->8---
>
> Any suggestion if I'm missing a character? My next step would be to add
> the same regexp to `LaTeX-auto-label-regexp-list' in order to make
> AUCTeX also capable of this feature. Any comments welcome.
Following up myself, I'm closing this one as it is fixed in Emacs:
http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=b18cecf89bbb9d2d057f86e8fa1a1f1417d887b6
http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=eed512814c45cd5859a1814bf07ad18ea3fa3b1a
Best, Arash
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