This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.
This package adds some combinators that can be used with any type constructor that has an instance for both Alternative and Monad. The rationale, design and implementation are all explained in an article in The Monad Reader issue 17, which will appear on http://themonadreader.wordpress.com/ imminently.
