MinMaxAvg: deprecate push method in favor of operator()

stuff/math.hh

@@ -16,6 +16,8 @@
 #include <boost/accumulators/statistics/min.hpp>
 #include <boost/accumulators/statistics/mean.hpp>
 
+#include <dune/common/deprecated.hh>
+
 namespace Stuff {
 
 /** \todo DOCME **/
@@ -109,7 +111,12 @@ public:
     return boost::accumulators::mean(acc_);
   }
 
-  void push(const ElementType& el)
+  void DUNE_DEPRECATED push(const ElementType& el)
+  {
+    acc_(el);
+  }
+
+  void operator()(const ElementType& el)
   {
     acc_(el);
   }