#9588: Add `MonadPlus {IO,Either e}` and `Alternative (Either e)` instances -------------------------------------+------------------------------------- Reporter: hvr | Owner: hvr Type: task | Status: new Priority: normal | Milestone: 7.12.1 Component: Core Libraries | Version: Resolution: | Keywords: report- Operating System: Unknown/Multiple | impact Type of failure: None/Unknown | Architecture: Blocked By: | Unknown/Multiple Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by ekmett): We should at least split this up into the easy and the hard cases and bite off the `IO` instances for now, and we can explicitly punt on the `Either e` case until someone comes up with a better idea. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9588#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler