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1. mapMaybeWithKey :: (Key -> a -> Maybe b) -> Word64Map a -> Word64Map b

   ghc-lib-parser	GHC.Data.Word64Map.Internal

   Map keys/values and collect the Just results.

   let f k _ = if k < 5 then Just ("key : " ++ (show k)) else Nothing
   mapMaybeWithKey f (fromList [(5,"a"), (3,"b")]) == singleton 3 "key : 3"
   

2. mapMaybeWithKey :: (Key -> a -> Maybe b) -> Word64Map a -> Word64Map b

   ghc-lib-parser	GHC.Data.Word64Map.Lazy

   Map keys/values and collect the Just results.

   let f k _ = if k < 5 then Just ("key : " ++ (show k)) else Nothing
   mapMaybeWithKey f (fromList [(5,"a"), (3,"b")]) == singleton 3 "key : 3"
   

3. mapMaybeWithKey :: (Key -> a -> Maybe b) -> Word64Map a -> Word64Map b

   ghc-lib-parser	GHC.Data.Word64Map.Strict

   Map keys/values and collect the Just results.

   let f k _ = if k < 5 then Just ("key : " ++ (show k)) else Nothing
   mapMaybeWithKey f (fromList [(5,"a"), (3,"b")]) == singleton 3 "key : 3"
   

4. mapMaybeWithKey :: (Key -> a -> Maybe b) -> Word64Map a -> Word64Map b

   ghc-lib-parser	GHC.Data.Word64Map.Strict.Internal

   Map keys/values and collect the Just results.

   let f k _ = if k < 5 then Just ("key : " ++ (show k)) else Nothing
   mapMaybeWithKey f (fromList [(5,"a"), (3,"b")]) == singleton 3 "key : 3"
   

5. mapMaybeNameEnv :: (a -> Maybe b) -> NameEnv a -> NameEnv b

   ghc-lib-parser	GHC.Types.Name.Env

   No documentation available.

6. mapMaybeOccEnv :: (a -> Maybe b) -> OccEnv a -> OccEnv b

   ghc-lib-parser	GHC.Types.Name.Occurrence

   mapMaybe for b OccEnv.

7. mapMaybeUniqSet_sameUnique :: (a -> Maybe b) -> UniqSet a -> UniqSet b

   ghc-lib-parser	GHC.Types.Unique.Set

   Like mapMaybe, but you must ensure the passed in function does not change the Unique.

8. mapMaybeModuleEnv :: (Module -> a -> Maybe b) -> ModuleEnv a -> ModuleEnv b

   ghc-lib-parser	GHC.Unit.Module.Env

   No documentation available.

9. mapMaybe' :: Foldable f => (a -> Maybe b) -> f a -> [b]

   ghc-lib-parser	GHC.Utils.Misc

   No documentation available.

10. mapMaybeM :: Applicative m => (a -> m (Maybe b)) -> [a] -> m [b]

    ghc-lib-parser	GHC.Utils.Monad

    Applicative version of mapMaybe

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