1[ uuid(db7e03ba-5bdb-11dc-9f61-00023f108d6c), 2 version(1.0), 3 pointer_default(unique) 4] 5 6interface echou { 7 8 typedef [switch_type(long int)] union 9 { 10 [case(1)] long int integer; 11 [case(2)] float fp; 12 [case(3),string] char *str; 13 } EchoUnion; 14 15 boolean ReplyBack( 16 [in] handle_t h, 17 [in] long int in_type, 18 [in, switch_is(in_type), unique] EchoUnion* in_value, 19 [out, switch_is(in_type)] EchoUnion** out_value, 20 [out, ref] error_status_t * status 21 ); 22} 23