Recognize Objective C @tokens.

shared/cplusplus/Token.h

@@ -73,6 +73,7 @@ enum Kind {
     T_WIDE_CHAR_LITERAL,
     T_STRING_LITERAL,
     T_WIDE_STRING_LITERAL,
+    T_AT_STRING_LITERAL,
     T_ANGLE_STRING_LITERAL,
     T_LAST_LITERAL = T_ANGLE_STRING_LITERAL,
 
@@ -199,6 +200,34 @@ enum Kind {
     T___ATTRIBUTE__,
     T___TYPEOF__,
 
+    // obj c++ @ keywords
+    T_FIRST_OBJC_KEYWORD,
+
+    T_AT_CATCH = T_FIRST_OBJC_KEYWORD,
+    T_AT_CLASS,
+    T_AT_COMPATIBILITY_ALIAS,
+    T_AT_DEFS,
+    T_AT_DYNAMIC,
+    T_AT_ENCODE,
+    T_AT_END,
+    T_AT_FINALLY,
+    T_AT_IMPLEMENTATION,
+    T_AT_INTERFACE,
+    T_AT_NOT_KEYWORD,
+    T_AT_OPTIONAL,
+    T_AT_PACKAGE,
+    T_AT_PRIVATE,
+    T_AT_PROPERTY,
+    T_AT_PROTECTED,
+    T_AT_PROTOCOL,
+    T_AT_PUBLIC,
+    T_AT_REQUIRED,
+    T_AT_SELECTOR,
+    T_AT_SYNCHRONIZED,
+    T_AT_SYNTHESIZE,
+    T_AT_THROW,
+    T_AT_TRY,
+
     T_FIRST_QT_KEYWORD,
 
     // Qt keywords