[Haskell-cafe] Animas/Yampa: ArrowChoice?

Hello all, I really like the way Animas (fork of Yampa) represents reactive systems, and I would love to write some of my simulations using it. Unfortunately most of what I want to do requires dynamic systems, which can be boiled down to me believing to need an ArrowChoice instance for the SF arrow, because I have to choose between different signal paths depending on the input signal or events. Animas appears to be only suitable for robot-like systems with specific, predefined actors. Is there anything I can do about it? Is it difficult to write the ArrowChoice instance? Or is there a different solution, which I overlooked? Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/