+%define %typemap_output_ptr(Type)
+ %typemap(in,numinputs=0) Type *OUTPUT ($*1_ltype temp),
+ Type &OUTPUT ($*1_ltype temp)
+ "$1 = new Type;";
+ %fragment("t_out_helper"{Type},"header",
+ fragment="t_output_helper") {}
+ %typemap(argout,fragment="t_out_helper"{Type}) Type *OUTPUT, Type &OUTPUT
+ // generate None if smartpointer is NULL
+ "$result = t_output_helper($result, ((*$1) ? SWIG_NewPointerObj((void*)($1), $1_descriptor, 1) : (Py_INCREF(Py_None), Py_None)));"
+%enddef
+