使用带有xml_oarchive的Boost序列化时assertion_failed

Question

编译Boost序列化的简单测试时:

class Test
{
protected:
    int Num;

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

public:
    Test(): Num(0) {}
    ~Test() {}
};

使用xml_oarchive输出,我遇到以下GCC错误:

C:\Development\Libraries\boost_1_55_0\boost\mpl\assert.hpp|289|error: no matching function for call to 'assertion_failed(mpl_::failed************ boost::serialization::is_wrapper<Test>::************)'|

使用其他oarchive类型时,它编译并运行正常.我所做的所有研究都指出我使用BOOST_SERIALIZATION_NVP宏来解决错误,但我已经这样做了,我仍然得到这个错误.

有没有人遇到过同样的问题？

Answer 1

如boost序列化的源代码中所述:

// Anything not an attribute and not a name-value pair is an
// error and should be trapped here.
template<class T>
void save_override(T & t, BOOST_PFTO int)
{
    // If your program fails to compile here, its most likely due to
    // not specifying an nvp wrapper around the variable to
    // be serialized.
    BOOST_MPL_ASSERT((serialization::is_wrapper< T >));
    this->detail_common_oarchive::save_override(t, 0);
}

您可能不会将它与Test对象一起使用:

Test test;
ar << BOOST_SERIALIZATION_NVP(test);