Highlight CSS variable definitions

* lisp/textmodes/css-mode.el (css-nmstart-re): Tweak regexp to accept
CSS variables.  (Bug#21638)

diff --git a/lisp/textmodes/css-mode.el b/lisp/textmodes/css-mode.el
index 5f4eebdf9770bcf178a1ccc92dd7a76043adaf02..3e84b43bcb4726dcb2c36ec809d9dc96c5073915 100644 (file)
--- a/lisp/textmodes/css-mode.el
+++ b/lisp/textmodes/css-mode.el
@@ -215,7 +215,7 @@
 (defconst css-escapes-re
   "\\\\\\(?:[^\000-\037\177]\\|[0-9a-fA-F]+[ \n\t\r\f]?\\)")
 (defconst css-nmchar-re (concat "\\(?:[-[:alnum:]]\\|" css-escapes-re "\\)"))
-(defconst css-nmstart-re (concat "\\(?:[[:alpha:]]\\|" css-escapes-re "\\)"))
+(defconst css-nmstart-re (concat "\\(?:--\\)?\\(?:[[:alpha:]]\\|" css-escapes-re "\\)"))
 (defconst css-ident-re ;; (concat css-nmstart-re css-nmchar-re "*")
   ;; Apparently, "at rules" names can start with a dash, e.g. @-moz-keyframes.
   (concat css-nmchar-re "+"))