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Pare algorithmWithTerms down to its essentials.

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This commit is contained in:
Rob Rix 2016-08-04 11:09:48 -04:00
parent 401b78099c
commit 78a5e8cf32
1 changed files with 1 additions and 2 deletions
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src/Interpreter.hs
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@ -35,12 +35,11 @@ diffComparableTerms construct comparable cost a b
| comparable a b = run construct comparable cost (algorithmWithTerms construct a b)
| otherwise = Nothing
algorithmWithTerms :: Eq leaf => (TermF leaf (Both a) diff -> diff) -> Term leaf a -> Term leaf a -> Algorithm (Term leaf a) diff diff
algorithmWithTerms :: (TermF leaf (Both a) diff -> diff) -> Term leaf a -> Term leaf a -> Algorithm (Term leaf a) diff diff
algorithmWithTerms construct t1 t2 = case (unwrap t1, unwrap t2) of
(Indexed a, Indexed b) -> do
diffs <- byIndex a b
annotate (Indexed diffs)
(Leaf a, Leaf b) | a == b -> annotate (Leaf b)
_ -> recursively t1 t2
where annotate = pure . construct . (both (extract t1) (extract t2) :<)