On Sat, 2008-05-17 at 15:12 +0200, Achim Schneider wrote: > Token.hs:103:15: > Overlapping instances for Show (SourcePos, Tok) > arising from a use of `anyToken' at Token.hs:103:15-22 > Matching instances: > instance (Show a, Show b) => Show (a, b) -- Defined in GHC.Show > instance [overlap ok] Show Token > -- Defined at Token.hs:(39,0)-(40,23) > > I was just trying _not_ to show the a of (a,b)
A point in favour of newtypes newtype Token = Token (SourcePos, Tok) instance Show Token where ... _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
