New subject: boost::serialization does not compile when archivingto xml

21 Dec 2008

      Building a Win32 console app, the following code compiles just fine:

#include "stdafx.h"
#include <boost/archive/text_oarchive.hpp>
#include <fstream>

class SomeClass
{
public:
    SomeClass() : m_foo(666), m_bar(777.f) {}

private:
    friend class boost::serialization::access;
    template<class Archive>
    void serialize(Archive& archive, const unsigned int version)
    {
        archive & m_foo;
        archive & m_bar;
    }

    int m_foo;
    float m_bar;
};

int _tmain(int argc, _TCHAR* argv[])
{
    SomeClass someClass;
    std::ofstream fileStream("TestFile.object");
    boost::archive::text_oarchive oa(fileStream);
    oa << someClass;

    return 0;
}

but if I include xml_oarchive.hpp and create an xml_oarchive object, just
changing the include statement and the type of oa, I get the following
error:
...
c:\program files
(x86)\boost\boost_1_36_0\boost\archive\basic_xml_oarchive.hpp(88) : error
C2664: 'boost::mpl::assertion_failed' : cannot convert parameter 1 from
'boost::mpl::failed ************boost::serialization::is_wrapper<T>::*
***********' to 'boost::mpl::assert<false>::type'
1>        with
1>        [
1>            T=SomeClass
1>        ]
1>        No constructor could take the source type, or constructor overload
resolution was ambiguous
1>        c:\program files
(x86)\boost\boost_1_36_0\boost\archive\detail\interface_oarchive.hpp(64) :
see reference to function template instantiation 'void
boost::archive::basic_xml_oarchive<Archive>::save_override<T>(T &,int)'
being compiled
1>        with
1>        [
1>            Archive=boost::archive::xml_oarchive,
1>            T=SomeClass
1>        ]
1>        c:\users\daniel\documents\visual studio
2008\projects\testdata\testdata.cpp(31) : see reference to function template
instantiation 'Archive
&boost::archive::detail::interface_oarchive<Archive>::operator
<<<SomeClass>(T &)' being compiled
1>        with
1>        [
1>            Archive=boost::archive::xml_oarchive,
1>            T=SomeClass
1>        ]
Basically, I can't archive into XML. Can someone please explain what I am
doing wrong? I am using Windows Vista, Visual Studio 2008 and boost v36,

Thanks

boost::serialization does not compile when archiving to xml

Daniel Roberts

Robert Ramey

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