queue package:box

Create an unbounded queue, returning both results.

>>> queue Unbounded (\c -> glue c <$|> qList [1..3]) toListM
((),[1,2,3])

STM Queues, based originally on pipes-concurrency

Queue specifies how messages are queued

Create an unbounded queue, returning the result from the Committer action.

Create an unbounded queue, returning the result from the Emitter action.