Hello, I have some code giving me the error message: “GADT pattern match in non-rigid context for … Tell GHC HQ if you'd like this to unify the context”. I reduced my code to the following example which still gives this error message:
> data T a b where > > C :: T a [b] > > f :: (forall a'. T a' b) -> T a b > f t = case t of C -> C How do I work around this error? Some former e-mail discussion gave the hint of adding a type signature but this probably doesn’t work in my case. Note also that specializing the type of the argument t to T a b inside the definition of f is not an option since in the real code I need the first argument of T to be universally quantified for calling another function which needs this quantification. I use GHC 6.8.2. Don’t know whether this problem still shows up with GHC HEAD but am interested in hearing whether this is the case. I’m thankful for any help. Best wishes, Wolfgang _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users