Re: [Haskell-cafe] Why Maybe exists if there is Either?

On Thu, Jan 09, 2014 at 05:36:06PM +0100, Vlatko Basic wrote:

But instance declarations wouldn't be needed because we already have all the instances for Either. The point would be to have them unified.

http://hackage.haskell.org/package/errors-1.4.5/docs/Control-Error-Util.html