我正在使用boost序列化来存储和加载多个类。我的目标是在一个包含其他类的类上使用序列化,因此其他类将序列化。
但问题是这些类包含前向声明和继承,并且我无法使用这些类进行boost序列化。
我在编译时遇到问题,特别是在前向声明方面,有这些错误:
error: invalid use of incomplete type ‘class C’
error: forward declaration of ‘class C’
error: ‘value’ is not a member of ‘boost::is_polymorphic<C>’
...
有人可以告诉我我的代码有什么问题吗?我错过了什么吗? 我的序列化派生和转发声明类的代码是否正确?
A.h:
#include <boost/serialization/access.hpp>
#include <boost/serialization/vector.hpp>
class B;
class C;
class A {
private:
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive& ar, const unsigned int version) {
ar & m_Bvector;
}
protected:
vector<B*> m_Bvector;
vector<C*> m_Cvector;
/*....*/
}
注意:向量m_Bvector可以包含B *或/和C *对象
B.h:
#include <boost/serialization/access.hpp>
#include "A.h"
class B {
private :
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive& ar, const unsigned int version) {
ar & m_someInt;
}
protected :
int m_someInt;
/*....*/
}
C.h:
#include <boost/serialization/base_object.hpp>
#include "B.h"
classe C : public B {
private:
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive& ar, const unsigned int version) {
ar & boost::serialization::base_object<B>(*this);
ar & m_someOtherInt;
}
protected:
int m_someOtherInt;
/*....*/
}
这是我调用保存和加载函数的方法:
SerializationManager.h:
#include <A.h>
#include <C.h>
#include <boost/serialization/export.h>
BOOST_CLASS_EXPORT(C);
class SerializationManager {
/*....*/
public:
bool save(string filename);
bool load(string filename);
protected:
A* m_classToSave;
}
SerializationManager.cpp:
#include "SerializationManager.h"
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <fstream>
#include <sstream>
bool SerializationManager::save(string filemname)
{
std::ofstream outputFile(filemname);
assert(outputFile.good());
boost::archive::text_oarchive oTextArchive(outputFile);
oTextArchive << m_classToSave;
return true;
}
bool SerializationManager::load(string filename)
{
delete m_classToSave;
std::ifstream ifs( filename );
assert(ifs.good());
boost::archive::text_iarchive ia(ifs);
// restore the schedule from the archive
ia >> m_classToSave;
return true;
}
/* ... */
答案 0 :(得分:1)
Boost需要知道类型是否是虚拟的(具有任何虚拟方法,即通常使用vtable实现),因此它可以依赖typeid
和dynamic_cast
来返回运行时保真度值。
您尝试在类型定义可用之前实例化序列化机制(仅在前向声明时类型不完整),因此无法生成序列化代码。