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Define diffTerms in terms of diffComparableTerms.

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Rob Rix 2016-08-04 10:47:31 -04:00
parent c0d702c22d
commit 99b076df80
1 changed files with 1 additions and 3 deletions
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src/Interpreter.hs
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@ -27,9 +27,7 @@ type DiffConstructor leaf annotation = CofreeF (Syntax leaf) (Both annotation) (
-- | Diff two terms, given a function that determines whether two terms can be compared and a cost function.
diffTerms :: (Eq leaf, Hashable leaf, Eq (Record fields), HasField fields Category) => DiffConstructor leaf (Record fields) -> Comparable leaf (Record fields) -> SES.Cost (Diff leaf (Record fields)) -> Term leaf (Record fields) -> Term leaf (Record fields) -> Diff leaf (Record fields)
diffTerms construct comparable cost a b
| not (comparable a b) = replacing a b
| otherwise = fromMaybe (replacing a b) $ run construct comparable cost (algorithmWithTerms a b)
diffTerms construct comparable cost a b = fromMaybe (replacing a b) $ diffComparableTerms construct comparable cost a b
diffComparableTerms :: (Eq leaf, Hashable leaf, Eq (Record fields), HasField fields Category) => DiffConstructor leaf (Record fields) -> Comparable leaf (Record fields) -> SES.Cost (Diff leaf (Record fields)) -> Term leaf (Record fields) -> Term leaf (Record fields) -> Maybe (Diff leaf (Record fields))
diffComparableTerms construct comparable cost a b