Robert Ramey wrote: ...
If objects are to be serialized through a base class pointer, they must either:
a) Be previously serialized directly
If I understand what you mean by "serialized directly", that is what I am trying to do.
or through the derived class pointer.
This way it works. This is the meaning of "ar & BOOST_SERIALIZATION_NVP(this)" in the code at the end. It is semantically meaningless, but it generates a reference to the object with the pointer of the right type. Hopefully it does not do anything bad when deserializing.
template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base); // What is the intended purpose for the following? // I can't see why one would want to do this. /* uncomment to avoid the exception * ar & BOOST_SERIALIZATION_NVP(this); */ } };
François Fath