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8 lines
186 B
8 lines
186 B
7 years ago
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module Listy where
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newtype Listy a = Listy [a] deriving (Eq, Show)
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instance Monoid (Listy a) where
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mempty = Listy []
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mappend (Listy l) (Listy l') =
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Listy $ mappend l l'
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