;; Keywords that evaluate to certain values.
("\\_<__\\(?:LINE\\|ENCODING\\|FILE\\)__\\_>"
(0 font-lock-builtin-face))
- ;; Symbols.
- ("\\(^\\|[^:]\\)\\(:\\([-+~]@?\\|[/%&|^`]\\|\\*\\*?\\|<\\(<\\|=>?\\)?\\|>[>=]?\\|===?\\|=~\\|![~=]?\\|\\[\\]=?\\|@?\\(\\w\\|_\\)+\\([!?=]\\|\\b_*\\)\\|#{[^}\n\\\\]*\\(\\\\.[^}\n\\\\]*\\)*}\\)\\)"
+ ;; Symbols with symbol characters.
+ ("\\(^\\|[^:]\\)\\(:@?\\(?:\\w\\|_\\)+\\)\\([!?=]\\)?"
+ (2 font-lock-constant-face)
+ (3 (unless (and (eq (char-before (match-end 3)) ?=)
+ (eq (char-after (match-end 3)) ?>))
+ ;; bug#18466
+ font-lock-constant-face)
+ nil t))
+ ;; Symbols with special characters.
+ ("\\(^\\|[^:]\\)\\(:\\([-+~]@?\\|[/%&|^`]\\|\\*\\*?\\|<\\(<\\|=>?\\)?\\|>[>=]?\\|===?\\|=~\\|![~=]?\\|\\[\\]=?\\|#{[^}\n\\\\]*\\(\\\\.[^}\n\\\\]*\\)*}\\)\\)"
2 font-lock-constant-face)
;; Special globals.
(,(concat "\\$\\(?:[:\"!@;,/\\._><\\$?~=*&`'+0-9]\\|-[0adFiIlpvw]\\|"