
#14252: ApplicativeDo: Add compiler message about irrefutable pattern matches and Monad constraints -------------------------------------+------------------------------------- Reporter: mutantmell | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: 8.4.1 Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): When you add warnings like this you end up needing another flag to suppress the warning. What if the user says "No, I didn't to make the match irrefutable; quit bugging me". And then a per-module suppression flag is a bit of a blunt instrument. I'm not sure what's best; it would be good to get feedback from `ApplicativeDo` users. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14252#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler