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authorJoe Zhao <ztuowen@gmail.com>2015-08-24 15:45:45 -0600
committerJoe Zhao <ztuowen@gmail.com>2015-08-24 15:45:45 -0600
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+instance Monad ((->) e) where
+ return f = \_ -> f
+ (>>=) f1 f2 = \r -> f2 (f1 r) r
+ -- f1 :: m a
+ -- f2 :: a -> m b