#include 
#include 
#include 

class old_class {
public:
	old_class() : value("default") { }

	std::string value;

	MSGPACK_DEFINE(value);
};

class new_class {
public:
	new_class() : value("default"), flag(-1) { }

	std::string value;
	int flag;

	MSGPACK_DEFINE(value, flag);
};

int main(void)
{
	{
		old_class oc;
		new_class nc;

		msgpack::sbuffer sbuf;
		msgpack::pack(sbuf, oc);

		msgpack::zone zone;
		msgpack::object obj;
		msgpack::unpack(sbuf.data(), sbuf.size(), NULL, &zone, &obj);

		obj.convert(&nc);

		std::cout