static_assert 使用 boost 反序列化二进制数据时失败 "typex::value" 失败

Question

下面的代码序列化和反序列化 class 和结构的成员。序列化工作正常，但我在尝试使用 oarch >> BOOST_SERIALIZATION_NVP(outObj); 反序列化时遇到以下错误代码中有没有我没有实现也没有实现的大错误。

In file included from main.cpp:1: In file included from /usr/local/include/boost/archive/binary_oarchive.hpp:21: In file included from /usr/local/include/boost/archive/binary_oarchive_impl.hpp:22: In file included from /usr/local/include/boost/archive/basic_binary_oarchive.hpp:33: In file included from /usr/local/include/boost/archive/detail/common_oarchive.hpp:22: In file included from /usr/local/include/boost/archive/detail/interface_oarchive.hpp:23: In file included from /usr/local/include/boost/archive/detail/oserializer.hpp:68: /usr/local/include/boost/archive/detail/check.hpp:162:5: error: static_assert failed "typex::value" BOOST_STATIC_ASSERT(typex::value); ^ ~~~~~~~~~~~~ /usr/local/include/boost/static_assert.hpp:70:41: note: expanded from macro 'BOOST_STATIC_ASSERT'

#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/serialization/binary_object.hpp>
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/nvp.hpp>
#include <iostream>
#include <string>
#include <iomanip>
#include <sstream>
#include <fstream>

#include <map>
#include <boost/serialization/map.hpp>
#include <boost/serialization/split_member.hpp>

struct values
{
    std::string name;
    std::string sex;
    values():name("dummy"),sex("dummy"){} ;

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

class Myclass
{
public:

    Myclass()
    {
        values val1;
        e_group.insert( std::make_pair(1,val1) ) ;
        e_group.insert( std::make_pair(2,val1) ) ;
        p_group.insert( std::make_pair(1,e_group) ) ;
        p_group.insert( std::make_pair(2,e_group) ) ;
    }

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

    typedef   std::map<int,values> groups;
    typedef   std::map<int,groups> Pgroups;
    groups  e_group;
    Pgroups p_group;
};



int main()
{
    Myclass assetlist;

    auto os = std::ostringstream(std::ios::binary);

    boost::archive::binary_oarchive arch( os, boost::archive::no_header);

    arch << BOOST_SERIALIZATION_NVP(assetlist);

    std::string s1 = os.str();

    std::stringstream is( s1, std::ios_base::binary| std::ios_base::out| std::ios_base::in);

    Myclass outObj;

    boost::archive::binary_iarchive iarch (is , boost::archive::no_header );

    iarch >> BOOST_SERIALIZATION_NVP(outObj);

    return 0; 
 }

Answer 1

由于 Myclass::serialize 函数中的额外 'const'，您的静态断言失败。它应该看起来像：

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

关于 BOOST_SERIALIZATION_NVP() 用法请参阅 this 问题。

static_assert 使用 boost 反序列化二进制数据时失败 "typex::value" 失败

static_assert failed "typex::value" failure while deserialising binary data using boost

c++

boost

boost-serialization