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Implement the empty cases by pattern matching.

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Rob Rix 2015-11-18 07:27:19 -08:00
parent 13499cc520
commit 676ef16162
1 changed files with 2 additions and 2 deletions
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src/SES.hs
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@ -4,6 +4,6 @@ import Patch
import Diff import Diff
ses :: Eq a => [a] -> [a] -> [Either (Patch a) (a, a)] ses :: Eq a => [a] -> [a] -> [Either (Patch a) (a, a)]
ses a b | Prelude.null a = (Left . Insert) <$> b ses [] b = (Left . Insert) <$> b
ses a b | Prelude.null b = (Left . Delete) <$> a ses a [] = (Left . Delete) <$> a
ses (a : as) (b : bs) | a == b = Right (a, b) : ses as bs ses (a : as) (b : bs) | a == b = Right (a, b) : ses as bs