Redesign abstraction

alib2abstraction/src/abstraction/OperationAbstraction.hpp

@@ -29,6 +29,7 @@ public:
 	virtual bool eval ( ) = 0;
 	virtual unsigned numberOfParams ( ) const = 0;
 	virtual bool cached ( ) const = 0;
+	virtual void reset ( ) = 0;
 	virtual ext::type_index getParamTypeIndex ( unsigned index ) const = 0;
 	virtual ext::type_index getReturnTypeIndex ( ) const = 0;