#include <boost/static_assert.hpp>
#include <boost/serialization/is_virtual_base_of.hpp>

struct A {};
struct B : virtual A {};

struct Z {};

int main()
{
    using boost::is_virtual_base_of;

    // A virtual base of B, returns true => ok
    BOOST_STATIC_ASSERT(( is_virtual_base_of< A, B >::value ));

    // Z not virtual base of B, yet returns true too => huh?
    BOOST_STATIC_ASSERT(( !is_virtual_base_of< Z, B >::value ));

    return 0;
}