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| author | Sylvain Henry <sylvain@haskus.fr> | 2022-03-21 23:58:58 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-03-23 13:44:46 -0400 |
| commit | e6585ca168ba55ca81a3e6cd7221707719b7fa56 (patch) | |
| tree | 9bc849909746c254e00113e10f078dd77f87ca8a | |
| parent | e3f60577b5c513ae9c7bc6dc70c95c3e2762fa6c (diff) | |
| download | haskell-e6585ca168ba55ca81a3e6cd7221707719b7fa56.tar.gz | |
Define filterOut with filter
filter has fusion rules that filterOut lacks
| -rw-r--r-- | compiler/GHC/Utils/Misc.hs | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/compiler/GHC/Utils/Misc.hs b/compiler/GHC/Utils/Misc.hs index 06a784dba7..986d95144e 100644 --- a/compiler/GHC/Utils/Misc.hs +++ b/compiler/GHC/Utils/Misc.hs @@ -228,9 +228,7 @@ secondM f (x, y) = (x,) <$> f y filterOut :: (a->Bool) -> [a] -> [a] -- ^ Like filter, only it reverses the sense of the test -filterOut _ [] = [] -filterOut p (x:xs) | p x = filterOut p xs - | otherwise = x : filterOut p xs +filterOut p = filter (not . p) partitionWith :: (a -> Either b c) -> [a] -> ([b], [c]) -- ^ Uses a function to determine which of two output lists an input element should join |