Help for this page
INPUT T_PTROBJ if (sv_derived_from($arg, \"${ntype}\")) { ... OUTPUT T_PTROBJ sv_setref_pv($arg, \"${ntype}\", (void*)$var);
OUTPUT OUTPUT T_PTROBJ ... sv_setref_pv($arg, \"${ntype}\", (void*)$var); else sv_setsv( $arg, &PL_sv__undef );