Allow invoke of functions with signature void(void) in basyx::object

Change-Id: I4de87525fe25d2595b275a79b9b99f6033f541eb
Signed-off-by: Thomas Psota <thomas.psota@iese.fraunhofer.de>
diff --git a/sdks/c++/basys.sdk.cc/include/BaSyx/shared/object/obj_function.h b/sdks/c++/basys.sdk.cc/include/BaSyx/shared/object/obj_function.h
index b1736e3..d86035c 100644
--- a/sdks/c++/basys.sdk.cc/include/BaSyx/shared/object/obj_function.h
+++ b/sdks/c++/basys.sdk.cc/include/BaSyx/shared/object/obj_function.h
@@ -34,6 +34,18 @@
 		return func(&obj);
 	};
 
+	// Wrap void function with no arguments
+	static functionWrapper wrap_func(std::function<void(void)> f)
+	{
+		functionWrapper fw;
+		fw.func = [f](basyx::object*)
+		{
+			f();
+			return basyx::object::make_null();
+		};
+		return fw;
+	};
+
 	// Wrap function with no arguments
 	template<typename RetType>
 	static functionWrapper wrap_func(std::function<RetType(void)> f)