From: Hughes, James (jhughes_at_[hidden])
Date: 2007-05-04 10:15:44
> -----Original Message-----
> From: boost-users-bounces_at_[hidden]
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of Cyril
> Sent: 04 May 2007 15:02
> To: boost-users_at_[hidden]
> Subject: [Boost-users] xml serialization : compilation fails
>
> Hello all,
> I have a problem while attempting to serialize a simple
> object using xml (text works fine !).
>
> This is my code :
>
> // SomeData.h
> #include <boost/serialization/utility.hpp> #include
> <boost/serialization/base_object.hpp>
>
> class OBJECTS_API InternalData {
> public:
> InternalData();
> virtual ~InternalData();
> virtual int getInternals() const = 0;
> private:
> friend class boost::serialization::access;
> template<class Archive>
> void serialize(Archive & ar, const unsigned int version)
> {
> }
> };
>
> class OBJECTS_API RealData : public InternalData {
> public:
> RealData(int internals=0);
> int getInternals() const;
> private:
> int _internals;
>
> friend class boost::serialization::access;
> template<class Archive>
> void serialize(Archive & ar, const unsigned int version)
> {
> ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(InternalData)
> & BOOST_SERIALIZATION_NVP(_internals);
> }
> };
>
> class OBJECTS_API SomeData {
> public:
> SomeData(int internals=0);
> ~SomeData();
> InternalData* getInternals() const;
> private:
> InternalData* _data;
> static InternalData* createData(int internals);
>
> friend class boost::serialization::access;
> template<class Archive>
> void serialize(Archive & ar, const unsigned int version)
> {
> //ar.register_type(static_cast<RealData*>(0));
> ar & BOOST_SERIALIZATION_NVP(_data);
> }
> };
> //////////////////
> // somewhere else
> const SomeData data(4);
> boost::archive::xml_oarchive xoa(archive); //archive is a
> file stream xoa << data;
>
> ////////////////////
>
> This fails to compile because :
> // basic_xml_oarchive.hpp
> // 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_STATIC_ASSERT(0 == sizeof(T)); }
>
> I can't see why my code isn't correct according to that
> constraint. Any help ?
>
> Thanks in advance.
I just had a very similar (if not the same) problem - I spent some time
assigning GUID's to all the classes, and ensuring all base classes were
correctly serialised using BOOST_SERIALIZATION_BASE_OBJECT_NVP and that
seems to have fixed the problem. Whether it was that or something else
that got changed during the figuring out period is anyones guess!!
See BOOST_CLASS_EXPORT_GUID
James
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://listarchives.boost.org/mailman/listinfo.cgi/boost-users
>
This message (including any attachments) contains confidential
and/or proprietary information intended only for the addressee.
Any unauthorized disclosure, copying, distribution or reliance on
the contents of this information is strictly prohibited and may
constitute a violation of law. If you are not the intended
recipient, please notify the sender immediately by responding to
this e-mail, and delete the message from your system. If you
have any questions about this e-mail please notify the sender
immediately.