Re: [Haskell-beginners] MonadThrow, MonadReader and shake

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If you want `m ~ ReaderT Beamline m IO`, you can use something like: `liftIO $ runReaderT stateBeforeCallingShake $ toRuchePath attachements` (you need `stateBeforeCallingShake <- ask` before calling shake). ok, I will check this :). I've swapped the args above, it should be:

liftIO $ runReaderT (toRuchePath attachements) stateBeforeCallingShake

Does it mean that if an instance of the MonadReader was writtent for shake (Action). it should work out of the box ?

With additional `MonadThrow Action` and `MonadReader Beamline Action` instances it should work. But the MonadReader one is really specific to your use case. Cheers, Sylvain