Add CRTP base class for the policies of the generic device

fairmq/devices/BaseDeserializationPolicy.h

@@ -0,0 +1,61 @@
+/* 
+ * File:   BaseDeserializationPolicy.h
+ * Author: winckler
+ *
+ * Created on October 14, 2015, 1:01 PM
+ */
+
+#ifndef BASEDESERIALIZATIONPOLICY_H
+#define	BASEDESERIALIZATIONPOLICY_H
+
+
+#include "FairMQMessage.h"
+
+// c++11 code
+#include <type_traits>
+
+
+
+//  CRTP base class
+template <typename TDerived >
+class BaseDeserializationPolicy
+{
+public:
+    BaseDeserializationPolicy() 
+    {}
+
+    virtual ~BaseDeserializationPolicy()
+    {}
+
+    template<typename C = TDerived>
+    auto DeserializeMsg(FairMQMessage* msg)-> decltype(static_cast<C*>(this)->DeserializeMsg(msg) )
+    {
+    	static_assert(std::is_same<C, TDerived>{}, "BaseDeserializationPolicy::DeserializeMsg hack broken");
+    	return static_cast<TDerived*>(this)->DeserializeMsg(msg);
+    }
+
+};
+
+
+/*
+// c++14 code
+//  CRTP base class
+template <typename TDerived >
+class BaseDeserializationPolicy
+{
+public:
+    BaseDeserializationPolicy() 
+    {}
+
+    virtual ~BaseDeserializationPolicy()
+    {}
+
+    auto DeSerializeMsg(FairMQMessage* msg)
+    {
+    	return static_cast<TDerived*>(this)->DeSerializeMsg(msg);
+    }
+
+};*/
+
+#endif	/* BASEDESERIALIZATIONPOLICY_H */
+