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Document fromThese.

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This commit is contained in:
Rob Rix 2016-03-24 11:29:01 -04:00
parent b0757d5fd3
commit 9055ada149
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src/Data/Bifunctor/These.hs
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@ -11,6 +11,7 @@ these f _ _ (This this) = f this
these _ f _ (That that) = f that
these _ _ f (These this that) = f this that
-- | Return a pair of values given These and defaults for either side.
fromThese :: a -> b -> These a b -> (a, b)
fromThese a b = these (flip (,) b) ((,) a) (,)