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📝 Generics.

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Rob Rix 2020-01-13 13:45:24 -05:00
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semantic-tags/src/Tags/Tagging/Precise.hs
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@ -150,6 +150,11 @@ instance GTraversable1 c U1 where
gtraverse1 _ _ _ = pure U1
-- | @'Generics' t@ has a 'Traversable1' instance when @'Rep1' t@ has a 'GTraversable1' instance, making this convenient for applying 'traverse1' to 'Generic1' types lacking 'Traversable1' instances:
--
-- @
-- 'getGenerics' '<$>' 'traverse1' f g ('Generics' t) = 'to1' '<$>' 'gtraverse1' f g ('from1' t)
-- @
newtype Generics t a = Generics { getGenerics :: t a }
deriving (Foldable, Functor, Traversable)