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Document openRangePair.

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Rob Rix 2016-03-03 07:59:03 -05:00
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src/Alignment.hs
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@ -117,6 +117,7 @@ diffRanges (Pure patch) = fmap (characterRange . copoint) <$> unPatch patch
openEither :: MaybeOpen a -> MaybeOpen b -> MaybeOpen (Either a b)
openEither ifLeft ifRight which = either (fmap (const which) . ifLeft) (fmap (const which) . ifRight) which
-- | MaybeOpen test for (Range, a) pairs.
openRangePair :: Source Char -> MaybeOpen (Range, a)
openRangePair source pair = pair <$ openRange source (Prelude.fst pair)