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Add a before function.

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This commit is contained in:
Rob Rix 2015-11-19 17:25:28 -08:00
parent 69d797f135
commit 02b07b70d8
1 changed files with 5 additions and 0 deletions
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5
src/Patch.hs
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@ -10,3 +10,8 @@ after :: Patch a -> Maybe a
after (Replace _ a) = Just a
after (Insert a) = Just a
after _ = Nothing
before :: Patch a -> Maybe a
before (Replace a _) = Just a
before (Delete a) = Just a
before _ = Nothing