[Boost-users] pure virtual function call error

Subject: [Boost-users] pure virtual function call error
From: e120281 (mehbilgin_at_[hidden])
Date: 2009-03-11 03:09:09

class A
{
public:
        int i;
        A( int i ) { this->i = i; }
        ~A() {}
        template<class Archive>
    void serialize(Archive &ar, const unsigned int version)
    {
        ar & i;
    }	
};

class B
{
public:
        B() {}
        ~B()
        {
                std::string filename = "C:\\a2.txt";
                const A a( 2 );
                std::ofstream ofs( filename.c_str(), std::ios::out | std::ios::binary );
                boost::archive::binary_oarchive boa( ofs );
                boa << a;	
        }
        static B* getInstance()
        {
                static B instance;
                return &instance;
        }
        void serialize()
        {
                std::string filename = "C:\\a1.txt";
                const A a( 1 );
                std::ofstream ofs( filename.c_str(), std::ios::out | std::ios::binary );
                boost::archive::binary_oarchive boa( ofs );
                boa << a;		
        }
};

int main()
{
        B* b = B::getInstance();
        b->serialize();
}

When I run the above code in visual studio 2005 I get pure virtual function
call error.
If I comment out the line b->serialize(); then everything is ok.
What is wrong with the above code???
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