[Haskell-cafe] Either e Monad
dk at ropas.snu.ac.kr
Tue Sep 19 01:55:06 EDT 2006
Where is the Monad instance declaration of Either e?
>From the description of Control.Monad.Error, I deduce that Either e is
an instance of Monad.
class Monad m => MonadError e m | m -> e where ...
Error e => MonadError e (Either e)
But, I cannot find the Monad instance declaration of Either anywhere.
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