Re: [Haskell-cafe] Coroutines

Another implementation of coroutines is in the Streaming Component Combinators on Hackage (http://hackage.haskell.org/cgi-bin/hackage-scripts/package/scc). In this version, a coroutine is a monad transformer that can be laid over any monad, including Id and IO. Furthermore, you can have an arbitrary number of inputs/output channels but they are restricted to communicating a single value type.