#10190: Add a Monad instance for ((,) w) -------------------------------------+------------------------------------- Reporter: fumieval | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: | Version: 7.8.4 libraries/base | Operating System: Unknown/Multiple Keywords: | Type of failure: None/Unknown Architecture: | Blocked By: Unknown/Multiple | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Now Monoid is defined in GHC.Base; We can define a reasonable Monad instance for `(,) w`, as a writer monad. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10190 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler