#4159: move Monad and MonadFix instances for Either from mtl to base

Bas van Dijk v.dijk.bas at gmail.com
Tue Jun 29 07:47:28 EDT 2010


On Tue, Jun 29, 2010 at 11:26 AM, Ross Paterson <ross at soi.city.ac.uk> wrote:
> The proposal is to move the Monad and MonadFix instances for Either
> (currently in the mtl package) to Control.Monad.Instances and
> Control.Monad.Fix respectively

+1

(I assume the 'fail' method will keep its default definition of 'error'.)

Regards,

Bas


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