ekmett / ekmett/exceptions

Why no instance for Except?

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Description

Is there a reason [Except][1] is not an instance of `MonadCatch`? As I see it, `Except` is isomorphic to `Either`, and [there is an instance for the latter][2].

[1]: https://hackage.haskell.org/package/transformers-0.5.6.2/docs/Control-Monad-Trans-Except.html#t:Except
[2]: https://hackage.haskell.org/package/exceptions-0.10.2/docs/src/Control.Monad.Catch.html#line-346

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