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Interpret ByKey algorithms.

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This commit is contained in:
Rob Rix 2015-11-18 00:21:27 -08:00
parent 213d8fbd55
commit a7545ed749
1 changed files with 6 additions and 0 deletions
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6
src/Interpreter.hs
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@ -29,6 +29,12 @@ run (Free (Recursive a b f)) = run . f $ recur a b where
maybeInterpret (Just a) (Just b) = interpret a b
recur _ _ = Pure $ Replace a b
run (Free (ByKey a b f)) = run $ f byKey where
byKey = unions [ deleted, inserted, patched ]
deleted = (Pure . Delete) <$> difference a b
inserted = (Pure . Insert) <$> difference b a
patched = intersectionWith interpret a b
interpret :: Term a Info -> Term a Info -> Diff a
interpret a b = maybeReplace $ constructAndRun a b where
maybeReplace (Just a) = a