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Define run by iteration.

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This commit is contained in:
Rob Rix 2016-08-03 18:58:37 -04:00
parent fb8d95203f
commit 9f6fb541a7
1 changed files with 4 additions and 5 deletions
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9
src/Interpreter.hs
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@ -44,9 +44,8 @@ constructAndRun construct comparable cost t1 t2
-- | Runs the diff algorithm
run :: (Eq leaf, Hashable leaf, Eq (Record fields), HasField fields Category) => DiffConstructor leaf (Record fields) -> Comparable leaf (Record fields) -> SES.Cost (Diff leaf (Record fields)) -> Algorithm (Term leaf (Record fields)) (Diff leaf (Record fields)) (Diff leaf (Record fields)) -> Maybe (Diff leaf (Record fields))
run construct comparable cost algorithm = case runFree algorithm of
Pure diff -> Just diff
Free (Recursive t1 t2 f) -> run construct comparable cost . f $ recur a b where
run construct comparable cost algorithm = (`iter` fmap Just algorithm) $ \case
Recursive t1 t2 f -> f $ recur a b where
(annotation1 :< a, annotation2 :< b) = (runCofree t1, runCofree t2)
annotate = construct . (both annotation1 annotation2 :<)
@ -54,9 +53,9 @@ run construct comparable cost algorithm = case runFree algorithm of
diffThese = these (pure . Delete) (pure . Insert) (diffTerms construct comparable cost)
Free (ByIndex a b f) -> run construct comparable cost . f $ ses (constructAndRun construct comparable cost) cost a b
ByIndex a b f -> f $ ses (constructAndRun construct comparable cost) cost a b
Free (ByRandomWalkSimilarity a b f) -> run construct comparable cost . f $ rws (constructAndRun construct comparable cost) getLabel a b
ByRandomWalkSimilarity a b f -> f $ rws (constructAndRun construct comparable cost) getLabel a b
where getLabel (h :< t) = (category h, case t of
Leaf s -> Just s
_ -> Nothing)