将Boost序列化与xml_oarchive一起使用时assertion_failed [英] assertion_failed when using Boost Serialization with xml_oarchive

问题描述

在编译Boost序列化的简单测试时:

When compiling a simple test of Boost Serialization:

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进行输出，遇到以下GCC错误:

using an xml_oarchive for output, I am experiencing the following GCC error:

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>::************)'|

使用其他归档类型时，它可以编译并正常运行.我所做的所有研究都指出我要使用BOOST_SERIALIZATION_NVP宏来解决该错误，但我已经这样做了，但仍然遇到此错误.

When using other oarchive types, it compiles and runs fine. All the research I have done pointed me to using the BOOST_SERIALIZATION_NVP macro to solve the error, but I am already doing that and I still get this error.

有人遇到过同样的问题吗?

Has anyone experienced this same issue?

推荐答案

如boost序列化的源代码中所述:

As described in the source code of boost serialization:

// 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);
}

您可能不将其与Test对象一起使用:

You likely do not use it with your Test object:

Test test;
ar << BOOST_SERIALIZATION_NVP(test);

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