BDCS.Utils.Either

Utility functions to help with Either values

Documentation

maybeToEither :: MonadError e m => e -> Maybe a -> m a

Throw the passed err if the value is Nothing, otherwise return the value.

whenLeft :: Monad m => Either e a -> (e -> m ()) -> m ()

Run a function on the Left error, otherwise do nothing

whenRight :: Monad m => Either e a -> (a -> m ()) -> m ()

Run a function on the Right value, otherwise do nothing