From 4d9a0979f6930ef23ef0b05996cc737002b25e06 Mon Sep 17 00:00:00 2001
From: Tassilo Horn <tsdh@gnu.org>
Date: Mon, 15 Apr 2013 09:55:05 +0200
Subject: [PATCH] * textmodes/reftex-vars.el (reftex-label-regexps): New
 defcustom.

* textmodes/reftex.el (reftex-compile-variables): Use it.
---
 lisp/ChangeLog                |  6 ++++++
 lisp/textmodes/reftex-vars.el | 14 ++++++++++++++
 lisp/textmodes/reftex.el      |  8 +-------
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index b0997a307f5..34711b72c3e 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2013-04-15  Tassilo Horn  <tsdh@gnu.org>
+
+	* textmodes/reftex-vars.el (reftex-label-regexps): New defcustom.
+
+	* textmodes/reftex.el (reftex-compile-variables): Use it.
+
 2013-04-14  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* files.el (normal-mode): Only use default major-mode if no other mode
diff --git a/lisp/textmodes/reftex-vars.el b/lisp/textmodes/reftex-vars.el
index 2a5c9c55866..c00cf36c79e 100644
--- a/lisp/textmodes/reftex-vars.el
+++ b/lisp/textmodes/reftex-vars.el
@@ -863,6 +863,20 @@ DOWNCASE    t:   Downcase words before using them."
                          (string :tag ""))
                 (option (boolean :tag "Downcase words          "))))
 
+(defcustom reftex-label-regexps
+  '(;; Normal \\label{foo} labels
+    "\\\\label{\\(?1:[^}]*\\)}"
+    ;; keyvals [..., label = {foo}, ...] forms used by ctable,
+    ;; listings, minted, ...
+    "\\[[^]]*\\<label[[:space:]]*=[[:space:]]*{?\\(?1:[^],}]+\\)}?")
+  "List of regexps matching \\label definitions.
+The default value matches usual \\label{...} definitions and
+keyval style [..., label = {...}, ...] label definitions.  It is
+assumed that the regexp group 1 matches the label text, so you
+have to define it using \\(?1:...\\) when adding new regexps."
+  :group 'reftex-defining-label-environments
+  :type '(repeat (regexp :tag "Regular Expression")))
+
 (defcustom reftex-label-illegal-re "[^-a-zA-Z0-9_+=:;,.]"
   "Regexp matching characters not valid in labels."
   :group 'reftex-making-and-inserting-labels
diff --git a/lisp/textmodes/reftex.el b/lisp/textmodes/reftex.el
index d5bb0170cd9..21083fd188a 100644
--- a/lisp/textmodes/reftex.el
+++ b/lisp/textmodes/reftex.el
@@ -1081,13 +1081,7 @@ This enforces rescanning the buffer on next use."
            (wbol "\\(^\\)[ \t]*") ; Need to keep the empty group because
                                   ; match numbers are hard coded
            (label-re (concat "\\(?:"
-			     ;; Normal \label{...}
-			     "\\\\label{\\([^}]*\\)}"
-			     "\\|"
-			     ;; keyvals [..., label = {foo}, ...]
-			     ;; forms used by ctable, listings,
-			     ;; minted, ...
-			     "\\[[^]]*label[[:space:]]*=[[:space:]]*{?\\(?1:[^],}]+\\)}?"
+			     (mapconcat 'identity reftex-label-regexps "\\|")
 			     "\\)"))
            (include-re (concat wbol
                                "\\\\\\("
-- 
2.39.2