C / C++ / MFC

#include <assert.h>
#include <iostream>

using namespace std;

class myclass
{
public:
    myclass():_nID(10) { _nOldID = _nID; };

    void Serialize(std::ostream &os)
    {
        os << _nID;
    }

    void Deserialize(std::istream &is)
    {
        is >> _nOldID;
    }

private:
    int _nID, _nOldID;
};


class otherclass
{

};


namespace Serialize_SFINAE
{
    template <typename T>
    auto Serialize(T& obj, std::ostream &os) -> decltype(obj.Serialize(os),void())
    {
        obj.Serialize(os);
    }

    // fallback method
    template <typename T>
    void Serialize(T& obj, ...)
    {
        // replace this with valid code if you want to handle this error at runtime instead of compile time
        obj.this_class_doesnt_have_a_serialize_method;
    }
}


template <typename T>
void Serialize(std::ostream &os, T& obj)
{
    // Call the serialize method of T if present, call our fallback method otherwise
    Serialize_SFINAE::Serialize(obj, os);
}

// overloads for all primitive C/C++ types that can't have methods
void Serialize(std::ostream &os, int obj)
{
    os << obj;
}

void Serialize(std::ostream &os, bool obj)
{
    os << obj;
}


/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
int test_code()
{
    myclass Obj;
    //otherclass Obj;
    //bool Obj = false;
    //int Obj = 0;

    Serialize(cout, Obj);
    return 0;
}

class otherclass
{
public:
	otherclass(void):i(0)	{}

	friend std::ostream & operator << (std::ostream & os, otherclass &Obj)
	{
		os << Obj.i;
		return (os);
	}

	int i;
};

namespace Serialize_SFINAE
{
    template <typename T>
    auto Serialize(T& obj, std::ostream &os) -> decltype(obj.Serialize(os),void())
    {
        obj.Serialize(os);
    }
 
    // fallback method
    template <typename T>
    void Serialize( T& obj, std::ostream &os, ...)
    {
        // replace this with valid code if you want to handle this error at runtime instead of compile time
//        obj.this_class_doesnt_have_a_serialize_method;

		os << obj;
    }
}