On Sat, Oct 27, 2012 at 4:23 AM, Brandon Simmons
I've implemented this already here: http://hackage.haskell.org/package/chan-split . You can ignore the type classes I've defined; they're there for my own reasons and not part of the proposal.
So what's the complete API that we're discussing here? I think the /idea/ is great, but it doesn't feel like a concrete proposal until we have a list of type signatures, so we can discuss the details like whether or not `dupChan` is a good name for that operation (my instinct is that it sounds pretty much the same as `cloneChan`, and it's going to be hard to remember the difference). I think my preferred signature for `newBroadcastTChan` would be `STM (InTChan a, STM (OutTChan a))` or something similar. Then `dupChan` might be unnecessary.