{-# LANGUAGE DeriveDataTypeable #-} module HListExample.Datatypes2 where import Data.Typeable -- The fout-n-mouth example -- (deriving Typeable only supported for GHC) newtype Key = Key Integer deriving (Show,Eq,Ord,Typeable) newtype Name = Name String deriving (Show,Eq,Typeable) data Breed = Cow | Sheep deriving (Show,Eq,Typeable) newtype Price = Price Float deriving (Show,Eq,Ord,Typeable) data Disease = BSE | FM deriving (Show,Eq,Typeable)