#10635: -fwarn-redundant-constraints should not be part of -Wall -------------------------------------+------------------------------------- Reporter: Lemming | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.11 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: #9939, #9973, | Differential Rev(s): #10100, #10183 | Wiki Page: | -------------------------------------+------------------------------------- Comment (by Lemming): Replying to [comment:6 bgamari]:
It doesn't seem unreasonable to me to require users writing code like `asTypeOf1` to explicitly disable this warning. At the moment this can only be done on with module-level granularity but hopefully in the future we will have [[Design/LocalWarningPragmas|mechanisms]] for silencing warnings with greater precision.
If would prefer to disable the warning per constraint. E.g. I could wrap a not strictly needed constraint in a magic {{{Used :: Constraint -> Constraint}}}. However, this would not be possible in Haskell 98. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10635#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler