Question

我正在使用boost序列化来保存和加载数据。我的目标是存储包含对象的向量。他们的类型是派生类。

链接器告诉我有一些东西已经在另一个类的obj文件中定义了（这与我的序列化无关）。

有人可以告诉我我的代码有什么问题吗？我错过了什么吗？我的序列化派生类的代码是否正确？

这是输出：

错误1错误LNK2005：“public：static struct boost :: archive :: detail :: extra_detail :: guid_initializer const＆amp; const boost :: archive :: detail :: extra_detail :: init_guid :: g”（？g @？$ init_guid @VCYesNoElement @@@ extra_detail @ detail @ archive @ boost @@ 2ABU？$ guid_initializer @VCYesNoElement @@@ 2345 @ B）已在ElementFactory.obj中定义

错误2错误LNK2005：“public：static struct boost :: archive :: detail :: extra_detail :: guid_initializer const＆amp; const boost :: archive :: detail :: extra_detail :: init_guid :: g”（？g @？$ init_guid @VCYesNoElement @@@ extra_detail @ detail @ archive @ boost @@ 2ABU？$ guid_initializer @VCYesNoElement @@@ 2345 @ B）已在ElementFactory.obj中定义

错误3错误LNK2005：“public：static struct boost :: archive :: detail :: extra_detail :: guid_initializer const＆amp; const boost :: archive :: detail :: extra_detail :: init_guid :: g”（？g @？$ init_guid @VCYesNoElement @@@ extra_detail @ detail @ archive @ boost @@ 2ABU？$ guid_initializer @VCYesNoElement @@@ 2345 @ B）已在ElementFactory.obj中定义

错误4错误LNK2005：“public：static struct boost :: archive :: detail :: extra_detail :: guid_initializer const＆amp; const boost :: archive :: detail :: extra_detail :: init_guid :: g”（？g @？$ init_guid @VCYesNoElement @@@ extra_detail @ detail @ archive @ boost @@ 2ABU？$ guid_initializer @VCYesNoElement @@@ 2345 @ B）已在ElementFactory.obj中定义

错误5错误LNK2005：“public：static struct boost :: archive :: detail :: extra_detail :: guid_initializer const＆amp; const boost :: archive :: detail :: extra_detail :: init_guid :: g”（？g @？$ init_guid @VCYesNoElement @@@ extra_detail @ detail @ archive @ boost @@ 2ABU？$ guid_initializer @VCYesNoElement @@@ 2345 @ B）已在ElementFactory.obj中定义

这是基类（IElement）：

#ifndef __ELEMENT_H__
#define __ELEMENT_H__

#include <string>
#include <vector>
#include <cassert>

#include <boost\serialization\base_object.hpp>
#include <boost\serialization\export.hpp>
#include <boost\archive\binary_iarchive.hpp>
#include <boost\archive\binary_oarchive.hpp>

typedef enum eElementType
{
    eMultipleChoice,
    eYesNo,
    eKeyword,
    eText,
    eCloze
} eType;

class IElement
{

public:
    virtual ~IElement();

    void SetFrontText( const std::string& question );
    std::string GetFrontText();
    virtual eType GetType() = 0;

    int GetStatus();
    void StatusUp();
    void StatusDown();
    void Reset();

    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & boost::serialization::make_nvp( "Status", m_status );
        ar & boost::serialization::make_nvp( "FrontText", m_frontText );
    }

protected:
    bool VectorContainsString( std::vector<std::string>* _vec, const std::string& _str );
    bool RemoveStringFromVector( std::vector<std::string>* _vec, const std::string& _str );

    std::string m_frontText;

    int m_status;
};
BOOST_SERIALIZATION_ASSUME_ABSTRACT( IElement )

#endif // __ELEMENT_H__

这是派生类（CYesNoElement）：

#ifndef __YES_NO_ELEMENT_H__
#define __YES_NO_ELEMENT_H__

#include "Element.h"

class CYesNoElement : public IElement
{
public:
    CYesNoElement();
    virtual ~CYesNoElement();

    bool GetSolution();
    void SetSolution( bool solution );

    bool check( bool given_answer );

    // IElement
    virtual eType GetType();

    template<class Archive>
    void serialize(Archive & ar, unsigned int file_version)
    {
        BOOST_SERIALIZATION_BASE_OBJECT_NVP( IElement );
        ar & boost::serialization::make_nvp( "Solution", m_solution );
    }

private:
    bool m_solution;
};
BOOST_CLASS_EXPORT(CYesNoElement)

#endif // __YES_NO_ELEMENT_H__

这是 CElementFactory 类，其中链接器错误暗示：

#ifndef __ELEMENTFACTORY_H__
#define __ELEMENTFACTORY_H__

#include "ClozeElement.h"
#include "KeywordElement.h"
#include "MultipleChoiceElement.h"
#include "TextElement.h"
#include "YesNoElement.h"

class CElementFactory
{
public:
    CElementFactory(void);
    virtual ~CElementFactory(void);

    IElement* CreateElement( eType type );

private:
    CClozeElement* CreateClozeElement();
    CKeywordElement* CreateKeywordElement();
    CMultipleChoiceElement* CreateMultipleChoiceElement();
    CTextElement* CreateTextElement();
    CYesNoElement* CreateYesNoElement();
};

#endif // __ELEMENTFACTORY_H__

Answer 1

将BOOST_CLASS_EXPORT(CYesNoElement)放入.cpp。

使用派生类的boost序列化错误LNK2005（已在对象中定义）

1 个答案: