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📝 mapAnnotations.

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Rob Rix 2017-02-07 14:58:11 -05:00
parent 4a3dd9afd8
commit bb46960dd8
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src/Diff.hs
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@ -43,5 +43,6 @@ afterTerm :: Mergeable f => Diff f annotation -> Maybe (Term f annotation)
afterTerm = mergeMaybe after Both.snd
-- | Map a function over the annotations in a diff, whether in diff or term nodes.
mapAnnotations :: Functor f => (annotation -> annotation') -> Diff f annotation -> Diff f annotation'
mapAnnotations f = iter (\ (h :< functor) -> wrap (fmap f h :< functor)) . fmap (pure . fmap (fmap f))