c++ - 使用多态类 boost XML归档编译错误

Question

我正在尝试使用增强归档将文件保存为XML格式。
我在编译时遇到了这两个错误。

错误C2664'int boost::mpl::assertion_failed(boost::mpl::assert::type)':无法从'boost::mpl::failed ***********转换参数1将boost::serialization::is_wrapper::***********'提升为'boost::mpl::assert::type'

错误C2789'mpl_assertion_in_line_6':必须初始化const限定类型的对象

由于这两行而发生这种情况。

BOOST_CLASS_EXPORT_GUID(SumKeyframeXYZ, "SumKeyframeXYZ")
BOOST_CLASS_EXPORT_GUID(SumPosition_Channel, "SumPosition_Channel")

这是主要功能。

#include "Container.h"

BOOST_CLASS_EXPORT_GUID(SumKeyframeXYZ, "SumKeyframeXYZ")
BOOST_CLASS_EXPORT_GUID(SumPosition_Channel, "SumPosition_Channel")

int main()
{
    std::ofstream ofs("D:\\output.xml");
    Container cont;
    cont.AddPositionChannel();
    boost::archive::xml_oarchive oa(ofs);
    oa << BOOST_SERIALIZATION_NVP(cont);
    return 0;
}

这就是类结构的样子。
容器.h

#include <string>
#include "SumChannel.h"
#include "SumPosition_Channel.h"
#include <fstream>
#include <iostream>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/serialization/vector.hpp>
#include <boost/serialization/shared_ptr.hpp>

class Container
{
private:
    std::string stdstrName;
    std::vector<std::shared_ptr<SumChannel>> Channels;

public:
    Container() { stdstrName = "Container Name"; }
    void AddPositionChannel() {
        std::shared_ptr< SumPosition_Channel> posChannel = std::make_shared<SumPosition_Channel>();
        Channels.push_back(posChannel);
    };


private:

    friend class boost::serialization::access;
    template<class Archive> void serialize(Archive & ar,
        const unsigned int version) const {
        ar & BOOST_SERIALIZATION_NVP(stdstrName);
        ar & BOOST_SERIALIZATION_NVP(Channels);
    }

};

//////////////////////////////////////////////////// ////////
SumChannel.h

#include <fstream>
#include <iostream>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/serialization/vector.hpp>

class SumChannel
{
public:
    float offset;

    SumChannel() { offset = 1.0; }

private:

    friend class boost::serialization::access;

    template<class Archive> void serialize(Archive & ar,
        const unsigned int version) const {
            ar & BOOST_SERIALIZATION_NVP(offset);   
    }
};

SumPosition_Channel

#include "SumKeyframeXYZ.h"
#include "SumChannel.h"
#include <vector>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/serialization/vector.hpp>

class SumPosition_Channel : public SumChannel
{
public:
    std::vector<SumKeyframeXYZ>  keyframes;

    void AddKeyframe() { SumKeyframeXYZ key; keyframes.push_back(key); }

private:
    friend class boost::serialization::access;
    
    typedef SumChannel _Super;
    template<class Archive> void serialize(Archive & ar,
        const unsigned int version) const {
        ar & boost::serialization::base_object<_Super>(*this);
        ar & BOOST_SERIALIZATION_NVP(keyframes);
    }
};

KeyFrameBase.h

#include <iostream>
#include <fstream>

#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>
class Keyframebase
{
public:
    std::string stdstrName;
    float time;

    Keyframebase() { stdstrName = "BaseKey"; time = 50.0; }
    
private:

    friend class boost::serialization::access;

    template<class Archive> void serialize(Archive & ar,
        const unsigned int version) {
        ar & BOOST_SERIALIZATION_NVP(stdstrName);
        ar & BOOST_SERIALIZATION_NVP(time);
    }

};

SumKeyframeXYZ.h

#include "KeyframeBase.h"
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/serialization/vector.hpp>

class SumKeyframeXYZ : public Keyframebase
{
public:
    float x;
    float y;
    float z;

    SumKeyframeXYZ() { x = 150.0; y = 200.0; z = 300.0; }

private:
    friend class boost::serialization::access;

    template<class Archive> void serialize(Archive & ar,
        const unsigned int version) const {
        ar & boost::serialization::base_object<Keyframebase>(*this);
        ar & BOOST_SERIALIZATION_NVP(x);
        ar & BOOST_SERIALIZATION_NVP(y);
        ar & BOOST_SERIALIZATION_NVP(z);
    }
};

Answer 1

代码的问题是我没有将NVP写入基类
我从更改了基类归档代码

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

对于所有基类而言。

typedef SumChannel _Super;
ar & boost::serialization::make_nvp("SumChannel", boost::serialization::base_object<_Super>(*this));

并从serilize函数中删除了const。