Created
May 13, 2012 14:20
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haskell money types
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| data Dollars = Dollars | |
| data Euro = Euro | |
| class Money a where | |
| (+) :: (Int, a) -> (Int, a) -> Int | |
| (+) (a, _) (b, _) = (Prelude.+) a b | |
| instance Money Dollars | |
| instance Money Euro |
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