extended_type_info_test() {
cmd_group_example* t=new testfunc_cmd();
const boost::serialization::extended_type_info * true_type
- = boost::serialization::type_info_implementation<libt2n::command>::type::get_derived_extended_type_info(*t);
+ = boost::serialization::type_info_implementation<libt2n::command>::type::get_const_instance().get_derived_extended_type_info(*t);
// note:if this exception is thrown, be sure that derived pointer
// is either regsitered or exported.
assert(NULL != true_type);