On Fri, 2010-12-10 at 14:35 +0900, Sebastian Fischer wrote: > Yes, I cannot find the Functor instance for ((->) r).
As the Applicative instance for ((->) r) depends on the Functor instance I "only" needed to go through the imports of Control.Applicative to find that the Functor instance of ((->) r) is defined in Control.Monad.Instances. If I import this module into GHCi, it finds the instance. Interestingly, if I import only Control.Applicative from within GHCi, it does not find the instances defined in Control.Monad.Instances although this module is imported in Control.Applicative. On the other hand, if I write a file containing the line 'import Control.Applicative' and load this file in GHCi then the instances from Control.Monad.Instances are visible. Apparently, importing a module in GHCi differs from importing it in a Haskell file and loading this into GHCi. Sebastian _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
