Joel Reymont wrote: > This is in Language.Haskell.TH.Syntax which is imported at the top of > Data/Derive/TH.hs so I don't understand the cause of the error > > instance Functor Q where > fmap f (Q x) = Q (fmap f x) > > ... > > Any suggestions?
Since Q is a Monad, you can make the instance > instance Functor Q where > fmap = liftM > > But Q is exported by Languave.Haskell.TH.Syntax !!! > Only the type constructor is exported, not the data constructor. Twan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
