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Simplify maybeUnionRanges.

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This commit is contained in:
Rob Rix 2016-03-04 20:03:37 -05:00
parent aea8e3e200
commit 6b17c3c1ff
1 changed files with 2 additions and 2 deletions
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4
src/Range.hs
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@ -73,8 +73,8 @@ unionRangesFrom :: (Functor f, Foldable f) => Range -> f Range -> Range
unionRangesFrom range ranges = option range id . foldl mappend mempty $ Option . Just <$> ranges
-- | Return Just the union of all the ranges in a Foldable, or else Nothing.
maybeUnionRanges :: (Functor f, Foldable f) => f Range -> Maybe Range
maybeUnionRanges ranges = getOption $ foldl mappend mempty $ Option . Just <$> ranges
maybeUnionRanges :: Foldable f => f Range -> Maybe Range
maybeUnionRanges ranges = getOption $ foldMap (Option . Just) ranges
instance Monoid (Option Range) where
mempty = Option Nothing