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🔥 diffSum.

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Rob Rix 2017-10-23 09:39:00 -04:00
parent 02d5bc1518
commit 8fbdd8e6c3
1 changed files with 0 additions and 6 deletions
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6
src/Data/Diff.hs
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@ -61,12 +61,6 @@ merging :: Functor syntax => Term syntax ann -> Diff syntax ann ann
merging = cata (\ (In ann syntax) -> mergeF (In (ann, ann) syntax))
diffSum :: (Foldable syntax, Functor syntax) => (forall a b. Patch a b -> Int) -> Diff syntax ann1 ann2 -> Int
diffSum patchCost = cata $ \ diff -> case diff of
Patch patch -> patchCost patch + sum (sum <$> patch)
Merge merge -> sum merge
diffPatch :: Diff syntax ann1 ann2 -> Maybe (Patch (TermF syntax ann1 (Diff syntax ann1 ann2)) (TermF syntax ann2 (Diff syntax ann1 ann2)))
diffPatch diff = case unDiff diff of
Patch patch -> Just patch