id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2508	Serialization emits lots of warnings for MSVC7.1 (non-polymorphic / shared_ptr)	Chard	Robert Ramey	"The serialization code emits many warnings if a non-polymorphic type is serialized via shared_ptr.

The following code demonstrates the issue:

{{{
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/shared_ptr.hpp>
#include <fstream>

struct X
{
    template <typename T>
    void serialize(T &ar, const unsigned int version)
    {}
};
typedef boost::shared_ptr<X> X_P;

void
test_ser()
{
    X_P x_p;

    std::ifstream ifstr(""test.txt"");
    boost::archive::text_iarchive ar(ifstr);
    ar & x_p;
}

}}}

Adding a virtual destructor to '''X''' causes the warnings to disappear, i.e. the serialization code ''wants'' the types to be polymorphic.

This appears to be an issue when building with MSVC (though only tested with 7.1) because gcc 4.3.2 does not emit the warnings.
"	Bugs	closed	Boost 1.38.0	serialization	Boost 1.36.0	Problem	fixed	non-polymorphic shared_ptr warnings MSVC 7.1