Re: [Haskell-cafe] Why Either = Left | Right instead of something like Result = Success | Failure

28 May 2010

      Quoth Vo Minh Thu ,
...
...
Control.Monad.Error provides an instance for Either.
... in the mtl transformer library, in case anyone else besides
myself didn't know that. And I see it has to be there because
it depends on the Error typeclass.

(So the documentation for Control.Monad.Error, is mistaken, where
at the top it says

  Example type:
      Either String a

... which should be

      Either Error a

... ?  Though I can't really be sure what the documentation is
trying to say.)

	Donn Cave, donn@avvanta.com