Fix fontification of namespaces to match using-statement rules.

Author: josteink

csharp-mode-tests.el

@@ -123,6 +123,12 @@
                         "WithNumbers09.Ok" 'font-lock-constant-face
                         ))
 
+(ert-deftest fontification-of-namespace-statements ()
+  (assess-face-in-file= "./test-files/namespace-fontification.cs"
+                        "namespace" 'font-lock-keyword-face
+                        "Reference" 'font-lock-constant-face
+                        "Under_scored" 'font-lock-constant-face
+                        "WithNumbers09.Ok" 'font-lock-constant-face
                         ))
 
 (defun list-repeat-once (mylist)

csharp-mode.el

@@ -1110,7 +1110,7 @@ to work properly with code that includes attributes.
            ;; this needs to be done in the matchers-after because
            ;; otherwise the namespace names get the font-lock-type-face,
            ;; due to the energetic efforts of c-forward-type.
-           ,`("\\<\\(namespace\\)[ \t\n\r\f\v]+\\(\\(?:[A-Za-z_][[:alnum:]]*\\.\\)*[A-Za-z_][[:alnum:]]*\\)"
+           ,`("\\<\\(namespace\\)[ \t\n\r\f\v]+\\(\\(?:[A-Za-z0-9_]+\\.\\)*[A-Za-z0-9_]+\\)"
               2 font-lock-constant-face t)
 
 

test-files/namespace-fontification.cs

@@ -0,0 +1,7 @@
+namespace Reference {
+
+}
+
+namespace Under_Scored {
+
+}