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From: Francis ANDRE (francis.andre_at_[hidden])
Date: 2004-10-02 12:07:39

Hi

I got a access violation on 0x00000000 with the class DDD but I cannot
figure
out what's wrong

When the symbol NO_EXCEPTION is defined, the member acccode is set to an
instance of ACCCODE and the serialization is working fine. But when this
symbol is undefined, one gets the exception.

I am suspecting the input serialization to bypass the loading of the member
FIELD* field (which is following the "acccode" member)
which leads to an exception when the next member DISP* disp is loaded
but I have no way to check it out

any idea??

Francis

Source code below and also joined in annex
----------------------------------------------------------------------
#include <iostream>
#include <fstream>
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>
using namespace std;

class FIELD : public string {
private:
        friend class boost::serialization::access;
        friend std::ostream & operator<<(std::ostream &os, const FIELD&);
        template<class Archive>
        void serialize(Archive &ar, const unsigned int version) {
            ar & boost::serialization::base_object<string>(*this);
            ar & member;
        }
        private:
        string member;
        FIELD(){}
        public:
        FIELD(const string& name): string(name){}
};

class DDD {
private:
        friend class boost::serialization::access;
        friend std::ostream & operator<<(std::ostream &os, const DDD& dd);
        template<class Archive>
        void serialize(Archive &ar, const unsigned int version) {
            ar & acccode;
            ar & field;
            ar & disp;
        }
        public:

        DDD():
            acccode(0),
            disp(0),
            field(0)
            {}

           class ACCCODE {
            private:
                friend class boost::serialization::access;
                friend std::ostream & operator<<(
                    std::ostream &os, const ACCCODE&
                );
                template<class Archive>
                void serialize(Archive &ar, const unsigned int version) {
                    ar & acccode;
                }
                public:
                string acccode;
                ACCCODE(){}
                ACCCODE(const string& s) : acccode(s) {}
            };
            class DISP {
            private:
                friend class boost::serialization::access;
                friend std::ostream & operator<<(
                    std::ostream &os, const DISP&
                );
                template<class Archive>
                    void serialize(Archive &ar, const unsigned int version)
{
                        ar & disp;
                    }
                public:
                string disp;
                DISP(){}
                DISP(const string& s) : disp(s) {}
            };
        public:
        ACCCODE* acccode;
        FIELD* field;
        DISP* disp;
};

int main(int argc, char* argv[]) {
        DDD ddd;

#ifdef NO_EXCEPTION
        ddd.acccode = new DDD::ACCCODE("a");
#endif
        ddd.field = new FIELD("BAR");
        ddd.disp = new DDD::DISP();
        const char* file = "TEST.txt";
        {
            std::ofstream os(file);
            boost::archive::text_oarchive oa(os);
            oa << ddd;
        }
        {
            std::ifstream is(file);
            boost::archive::text_iarchive ia(is);
            ia >> ddd;
        }
}

---------------------------------------------------------------------------- 

-- 
A good friend will come bail you out of jail..........
but, a true friend....will be sitting next to you saying:
 "...that was fun."
begin 666 test_serialization.cpp
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`
end
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