Hi Robert,

I know that it works for abstract base class. But if the base class is not abstract class how you do it? Is it possible?

Thanks,

yan

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From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey
Sent: Monday, July 11, 2005 3:55 PM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] How to serialize a derived class object withbaseclass pointer?

try making the base class a polymorphic class by adding the following changes:

virtual ~CMyCls1() = 0;

"Yan Zhang" <Yan.Zhang@mitchell.com> wrote in message news:F96935FCB9C3D549B3B6CD8915811A2F0FF00C7C@mail60nt.mitchell.com...

Hi,

I’m trying to serialize an object of derived class with a base class pointer, somehow only base class’s serialization member function got called. Here is the code (simplified):

class CMyCls1

{

public:

      CMyCls1() : m(10) {}

      ~CMyCls1() {}

private:

friend class boost::serialization::access;

template<class Archive>

void serialize(Archive &ar, const unsigned int version)

    {

            ar & BOOST_SERIALIZATION_NVP(m);

    }

int m;

virtual ~CMyCls1() = 0;

};

class CMyCls2 : public CMyCls1

{

public:

      CMyCls2() : x(1.5) {}

      ~CMyCls2() {}

private:

friend class boost::serialization::access;

template<class Archive>

void serialize(Archive &ar, const unsigned int version)

    {

            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(CMyCls1);

            ar & BOOST_SERIALIZATION_NVP(x);

    }

double x;

virtual ~CMyCls2();

};

void main ()

{

            CMyCls1 *pmycls = new CMyCls2;

            …

      oa.register_type(static_cast<CMyCls1 *>(NULL));

      oa.register_type(static_cast<CMyCls2 *>(NULL));

      oa << BOOST_SERIALIZATION_NVP(pmycls);

            …

}

Look at the archive file, only base class data is serialized. Actuall, CMyCls2::serialization() is not called at all. How do you serialize a derived class object with a pointer of base class?

Thanks,

Yan

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