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Derive a Foldable instance for Patch.

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Rob Rix 2016-04-11 16:50:48 -04:00
parent 465c1f9ab7
commit ddeb3f9063
1 changed files with 1 additions and 1 deletions
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src/Patch.hs
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@ -7,7 +7,7 @@ data Patch a =
Replace a a
| Insert a
| Delete a
deriving (Functor, Show, Eq)
deriving (Foldable, Functor, Show, Eq)
-- | Return the item from the after side of the patch.
after :: Patch a -> Maybe a