TYPEMAP
Session_Token      T_PTROBJ_SPECIAL

INPUT
T_PTROBJ_SPECIAL
  if (sv_derived_from($arg, \"${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\")){
    IV tmp = SvIV((SV*)SvRV($arg));
    $var = INT2PTR($type, tmp);
  }
  else
    croak(\"$var is not of type ${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\")

OUTPUT
T_PTROBJ_SPECIAL
  sv_setref_pv($arg, \"${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\",
               (void*)$var);