ddt = gras_datadesc_struct("s_xbt_host_t");
gras_datadesc_struct_append(ddt,"name",gras_datadesc_by_name("string"));
gras_datadesc_struct_append(ddt,"port",gras_datadesc_by_name("int"));
gras_datadesc_struct_close(ddt);
ddt = gras_datadesc_ref("xbt_host_t",ddt);
ddt = gras_datadesc_struct("s_xbt_host_t");
gras_datadesc_struct_append(ddt,"name",gras_datadesc_by_name("string"));
gras_datadesc_struct_append(ddt,"port",gras_datadesc_by_name("int"));
gras_datadesc_struct_close(ddt);
ddt = gras_datadesc_ref("xbt_host_t",ddt);