I have condensed a short example which is appended to this message. The code
tries to write then read a polymorphic class via a base pointer. The
assertion I am seeing is assert(NULL != bpos_ptr); in oserializer.hpp. The
documentation indicates that the problem is likely a lack of registration of
the class, however, I have done this. Interestingly the code only fails for
XML archive type.
// BoostPolymorphicSerialize.cpp : Defines the entry point for the console
application.
//
#include
#include
#include <iomanip>
#include <iostream>
#include <fstream>
#include <string>
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "boost/archive/xml_iarchive.hpp"
#include "boost/archive/xml_oarchive.hpp"
class CMyBaseClass
{
public:
CMyBaseClass(void):m_BaseValue(0){}
public:
virtual ~CMyBaseClass(void){}
int m_BaseValue;
friend class boost::serialization::access;
template<class Archive> void serialize(Archive & ar, const unsigned
int /* file_version */)
{
ar & BOOST_SERIALIZATION_NVP(m_BaseValue);
}
};
class CMyDerivedClass : public CMyBaseClass
{
public:
CMyDerivedClass(void):m_DerivedValue(1){}
public:
~CMyDerivedClass(void){}
int m_DerivedValue;
friend class boost::serialization::access;
template<class Archive> void serialize(Archive & ar, const unsigned
int /* file_version */)
{
BOOST_SERIALIZATION_BASE_OBJECT_NVP(CMyBaseClass);
ar & BOOST_SERIALIZATION_NVP(m_DerivedValue);
}
};
BOOST_CLASS_EXPORT_GUID(CMyBaseClass, "CMyBaseClass")
BOOST_CLASS_EXPORT_GUID(CMyDerivedClass, "CMyDerivedClass")
int _tmain(int argc, _TCHAR* argv[])
{
const CMyBaseClass* const pMyBaseClass=new CMyDerivedClass();
const std::string fileName("c:\\docs\\BoostSerializeTest.xml");
CMyBaseClass* pMyBaseClass2=0;
try
{
{
std::ofstream ofs(fileName.c_str());
assert(ofs.good());
boost::archive::xml_oarchive oa(ofs);
//boost::archive::text_oarchive oa(ofs);
oa << BOOST_SERIALIZATION_NVP(pMyBaseClass);
}
{
std::ifstream ifs(fileName.c_str());
assert(ifs.good());
boost::archive::xml_iarchive ia(ifs);
//boost::archive::text_iarchive ia(ifs);
ia >> BOOST_SERIALIZATION_NVP(pMyBaseClass2);
}
}
catch(std::exception& e)
{
std::cout << e.what() << std::endl;
}
delete pMyBaseClass;
delete pMyBaseClass2;
return 0;
}
