c++ - 使用 boost 序列化多态类

Question

当我尝试对 Sphere 是几何子类的数据进行序列化时，程序因未处理的异常而崩溃。

在 Serialization.exe 中的 0x000007FEFCA0B87D 抛出异常:Microsoft C++ 异常:内存位置 0x000000000022F730 处的 boost::archive::archive_exception

这发生在“ar & g ;”这一行

include "pch.h"
#include <iostream>
#include<fstream>
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>
#include "Geometry.h"
#include "Sphere.h"
#include <boost/serialization/export.hpp>


int main()
{
    const char* fileName = "saved.txt";

    Sphere Sph;
    Geometry* g = &Sph;

    // save data
    {
        // Create an output archive
        std::ofstream ofs(fileName);        
        boost::archive::text_oarchive ar(ofs);  
        ar & g ;    // This lines throws exception.     
    }
    Geometry* c_Restored;   
    //load data
    {
        // create an input stream
        std::ifstream ifs(fileName);        
        boost::archive::text_iarchive ar(ifs);
        ar & c_Restored;
    }


    c_Restored->PrintGeom();

    do
    {
        std::cout << '\n' << "Press a key to continue...";
    } while (std::cin.get() != '\n');
}

/////////////////////////////////////////////////////////////////

#include "Geometry.h"
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/export.hpp>




class Sphere : public Geometry
{
private:
    std::string stdstrSphere;


public:
    Sphere() : stdstrSphere( "DefaultSphere"){}
    Sphere( std::string str) : stdstrSphere(str) {}
    void PrintGeom()
    {
        std::cout << "Sphere Virtual Function" << std::endl;
    }

private:
    typedef Geometry _Super;
    friend class boost::serialization::access;


    template <typename Archive>
    void save(Archive& ar, const unsigned version) const {

        boost::serialization::base_object<_Super>(*this);
        ar & stdstrSphere;
    }

    template <typename Archive>
    void load(Archive& ar, const unsigned version) {

        boost::serialization::base_object<_Super>(*this);
        ar & stdstrSphere;
    }

    BOOST_SERIALIZATION_SPLIT_MEMBER()



};

///////////////////////////////////////////////////////////////////////// #pragma一次

#include <string>
#include <boost/serialization/split_member.hpp>
#include <boost/serialization/base_object.hpp>

class Geometry
{
private:
    std::string stdstringGeom;

public:
     virtual void  PrintGeom()
    {
        std::cout << "geometry virtual function";
    }

private:

    friend class boost::serialization::access;


    template <typename Archive>
    void save(Archive& ar, const unsigned version) const {
        ar & stdstringGeom;
    }

    template <typename Archive>
    void load(Archive& ar, const unsigned version) {
        ar & stdstringGeom;
    }


    BOOST_SERIALIZATION_SPLIT_MEMBER()
};

Answer 1

当我编译并运行代码时，异常文本显示为...

unregistered class - derived class not registered or exported

所以潜在的问题是您需要按照概述注册您的派生类 here .尝试在 main...

之前添加以下内容

BOOST_CLASS_EXPORT_GUID(Sphere, "Sphere")