提升序列化多态问题

Question

提升多态类的序列化似乎不起作用(1.40+ boost),例如使用以下代码,我相信我遵循以下规则:导出类并尝试使用gcc4.4(ubuntu)和windows VS2010(使用boost 1.48) :在下面的程序中,我希望打印10和100,但它只打印10,这意味着它只序列化了基类;

我大多是从boost的文档中复制了这个例子,但它仍然不起作用; 有谁有任何想法？非常感谢LS

#include <iostream>
#include <sstream>
#include <boost/serialization/base_object.hpp>
#include <boost/serialization/serialization.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/export.hpp>
#define NVP(X) X

class base {
public:
friend class boost::serialization::access;
base (){ v1 = 10;}
int v1;
template<class Archive>
void serialize(Archive & ar, const unsigned int file_version)
{
    ar & NVP(v1);
}
};


class derived : public base {
public:
friend class boost::serialization::access;
int v2 ;
derived() { v2 = 100;}
template<class Archive>
void serialize(Archive & ar, const unsigned int file_version){
    boost::serialization::base_object<base>(* this);
    ar & NVP(v2);
}
};
BOOST_CLASS_EXPORT(base);
BOOST_CLASS_EXPORT_GUID(derived, "derived");


int main ( ) 
{
std::stringstream ss;
boost::archive::text_oarchive ar(ss);
base *b = new derived();
ar << NVP(b);
std::cout << ss.str();
}

Answer 1

你忘了

virtual ~base() {}

这不仅是多态连续化工作所必需的(没有它你的类不是多态的),但我相信省略它是48个州的轻罪.IANAL,所以YMMV.

哦,它应该是ar & boost::serialization::base_object<...>.