[Haskell-cafe] Either e Monad

[Deokhwan Kim]

Dear all,

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.


http://haskell.org/ghc/docs/latest/html/libraries/mtl/Control-Monad-Error.html

  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.

Thanks.

-- 
Deokhwan Kim