#14249: ApplicativeDo: Pattern matching on a bind forces a Monad constraint -------------------------------+-------------------------------------- Reporter: mutantmell | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: invalid | Keywords: ApplicativeDo Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------+-------------------------------------- Comment (by bgamari): So you would like something like, {{{ ApplicativeDo is enabled yet Monad is required due to irrefutable pattern match; perhaps you want to make the match refutable by adding a ~? }}} Is this right? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14249#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler