[chuck-users] (casting) in chuck?

Hi, I am total newbie to chucK. been trying to make time to play with it more ever since last year but somehow that time didnt arrive until now. So for today's silly question I was wondering if there is some kind of implicit casting of objects in chuck? For instance I want to fill an array with specific UGens and then randomly retrieve one like so: //array of UGens UGen items[2]; SinOsc sin @=> items[0]; SawOsc saw @=> items[1]; //later in my loop Std.rand(0,1) => int item; items[item] @=> UGen mysteryOscillator; mysteryOscillator => dac; Obviously this is not working right now and I am wondering if I am doing something wrong syntactically or whether I am trying to do something that ChucK can't do. thanks for the help ! best - j