1 files changed, 23 insertions, 10 deletions

diff --git a/lisp/progmodes/ruby-mode.el b/lisp/progmodes/ruby-mode.el
index d1e42ca3443..f2fb95ce59a 100644
--- a/lisp/progmodes/ruby-mode.el
+++ b/lisp/progmodes/ruby-mode.el
@@ -1817,7 +1817,7 @@ It will be properly highlighted even when the call omits parens.")
   (defvar ruby-syntax-before-regexp-re
     (concat
      ;; Special tokens that can't be followed by a division operator.
-     "\\(^\\|[[=(,~;<>]"
+     "\\(^\\|[[{|=(,~;<>!]"
      ;; Distinguish ternary operator tokens.
      ;; FIXME: They don't really have to be separated with spaces.
      "\\|[?:] "
@@ -2053,8 +2053,9 @@ See `font-lock-syntax-table'.")
           "rescue"
           "retry"
           "return"
-          "then"
+          "self"
           "super"
+          "then"
           "unless"
           "undef"
           "until"
@@ -2071,10 +2072,10 @@ See `font-lock-syntax-table'.")
           "at_exit"
           "autoload"
           "autoload?"
+          "callcc"
           "catch"
           "eval"
           "exec"
-          "fork"
           "format"
           "lambda"
           "load"
@@ -2092,7 +2093,10 @@ See `font-lock-syntax-table'.")
           "sprintf"
           "syscall"
           "system"
+          "throw"
+          "trace_var"
           "trap"
+          "untrace_var"
           "warn"
           ;; keyword-like private methods on Module
           "alias_method"
@@ -2122,13 +2126,15 @@ See `font-lock-syntax-table'.")
           "__dir__"
           "__method__"
           "abort"
-          "at_exit"
           "binding"
           "block_given?"
           "caller"
           "exit"
           "exit!"
           "fail"
+          "fork"
+          "global_variables"
+          "local_variables"
           "private"
           "protected"
           "public"
@@ -2137,8 +2143,7 @@ See `font-lock-syntax-table'.")
           "readline"
           "readlines"
           "sleep"
-          "srand"
-          "throw")
+          "srand")
         'symbols))
      (1 font-lock-builtin-face))
     ;; Here-doc beginnings.
@@ -2149,13 +2154,21 @@ See `font-lock-syntax-table'.")
     "\\_<\\(?:BEGIN\\|END\\)\\_>\\|^__END__$"
     ;; Variables.
     (,(concat ruby-font-lock-keyword-beg-re
-              "\\_<\\(nil\\|self\\|true\\|false\\)\\_>")
-     1 font-lock-variable-name-face)
+              "\\_<\\(nil\\|true\\|false\\)\\_>")
+     1 font-lock-constant-face)
     ;; Keywords that evaluate to certain values.
     ("\\_<__\\(?:LINE\\|ENCODING\\|FILE\\)__\\_>"
      (0 font-lock-builtin-face))
-    ;; Symbols.
-    ("\\(^\\|[^:]\\)\\(:\\([-+~]@?\\|[/%&|^`]\\|\\*\\*?\\|<\\(<\\|=>?\\)?\\|>[>=]?\\|===?\\|=~\\|![~=]?\\|\\[\\]=?\\|@?\\(\\w\\|_\\)+\\([!?=]\\|\\b_*\\)\\|#{[^}\n\\\\]*\\(\\\\.[^}\n\\\\]*\\)*}\\)\\)"
+    ;; Symbols with symbol characters.
+    ("\\(^\\|[^:]\\)\\(:@?\\(?:\\w\\|_\\)+\\)\\([!?=]\\)?"
+     (2 font-lock-constant-face)
+     (3 (unless (and (eq (char-before (match-end 3)) ?=)
+                     (eq (char-after (match-end 3)) ?>))
+          ;; bug#18466
+          font-lock-constant-face)
+        nil t))
+    ;; Symbols with special characters.
+    ("\\(^\\|[^:]\\)\\(:\\([-+~]@?\\|[/%&|^`]\\|\\*\\*?\\|<\\(<\\|=>?\\)?\\|>[>=]?\\|===?\\|=~\\|![~=]?\\|\\[\\]=?\\|#{[^}\n\\\\]*\\(\\\\.[^}\n\\\\]*\\)*}\\)\\)"
      2 font-lock-constant-face)
     ;; Special globals.
     (,(concat "\\$\\(?:[:\"!@;,/\\._><\\$?~=*&`'+0-9]\\|-[0adFiIlpvw]\\|"