I am trying as an experiment to write something as follows:
data Wrapper a b where
Pure :: (a - b) - Wrapper a b
Nullable :: (Maybe a - b) - Wrapper a b
class Liftable a b where
liftTo :: (b - c) - a b c
instance Liftable Wrapper a where
liftTo = Pure
instance Liftable Wrapper (Maybe
On Tue, 12 Apr 2011, Edward Amsden wrote:
I am trying as an experiment to write something as follows:
data Wrapper a b where
Pure :: (a - b) - Wrapper a b
Nullable :: (Maybe a - b) - Wrapper a b
class Liftable a b where
liftTo :: (b - c) - a b c
instance Liftable Wrapper a where
liftTo
On Tue, Apr 12, 2011 at 3:13 PM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
On Tue, 12 Apr 2011, Edward Amsden wrote:
I am trying as an experiment to write something as follows:
data Wrapper a b where
Pure :: (a - b) - Wrapper a b
Nullable :: (Maybe a - b) - Wrapper a b
