Re: [Haskell-cafe] Either instance of Monad?

When I look at the documentation of Control.Monad.Error [1] or Control.Applicative [2] it is not said that it re-exports Control.Monad.Instances. So maybe this behaviour is normal... [1] http://hackage.haskell.org/packages/archive/mtl/2.0.1.0/doc/html/Control-Mon... [2] http://hackage.haskell.org/packages/archive/base/4.3.0.0/doc/html/Control-Ap... 2011/2/24 Yves Parès

I have the same problem with instances of Functor. For instance when I import Control.Applicative, to get the instance "Functor ((->) a)" I also have to import Control.Monad.Instances.

2011/2/23 Daniel Fischer :

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On Wednesday 23 February 2011 14:14:46, Yves Parès wrote:

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The latest, I think : GHC 7.0.1, mtl-2.0.1.0, base-4.3.0.0

Hmm, that's exactly what I have. Weirder and weirder. For the moment, I'm out of ideas.