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Add a Union type wrapping These.

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This commit is contained in:
Rob Rix 2016-04-14 12:05:21 -04:00
parent 19b6b1fc1d
commit 9f835dbd04
1 changed files with 4 additions and 0 deletions
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src/Data/Bifunctor/These.hs
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@ -39,6 +39,10 @@ apThese fg ab = uncurry maybeThese $ uncurry (***) (bimap (<*>) (<*>) (unpack fg
where unpack = fromThese Nothing Nothing . bimap Just Just
newtype Union a b = Union { getUnion :: Maybe (These a b) }
deriving (Eq, Show)
-- Instances
instance Bifunctor These where