lib/ruby-metrics/instruments/base.rb in ruby-metrics-0.8.5 vs lib/ruby-metrics/instruments/base.rb in ruby-metrics-0.8.6

@@ -4,11 +4,15 @@
             
       def to_i
         raise NotImplementedError
       end
       
-      def to_s
+      def to_json(*_)
         raise NotImplementedError
+      end
+      
+      def to_s
+        self.to_json
       end
       
       def to_f
         raise NotImplementedError
       end