lib/rubocop/cop/not.rb in rubocop-0.7.2 vs lib/rubocop/cop/not.rb in rubocop-0.8.0

@@ -1,15 +1,21 @@
 # encoding: utf-8
 
 module Rubocop
   module Cop
     class Not < Cop
-      ERROR_MESSAGE = 'Use ! instead of not.'
+      MSG = 'Use ! instead of not.'
 
-      def inspect(file, source, tokens, sexp)
-        each_keyword('not', tokens) do |t|
-          add_offence(:convention, t.pos.lineno, ERROR_MESSAGE)
+      def on_send(node)
+        _receiver, method_name, *args = *node
+
+        # not does not take any arguments
+        if args.empty? && method_name == :! &&
+            node.loc.selector.source == 'not'
+          add_offence(:convention, node.loc.line, MSG)
         end
+
+        super
       end
     end
   end
 end