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Within LTS Haskell 24.51 (ghc-9.10.3)

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1. naturalToWordMaybe :: Natural -> Maybe Word

   ghc-internal	GHC.Internal.Natural

   Try downcasting Natural to Word value. Returns Nothing if value doesn't fit in Word.

2. minusNaturalMaybe :: Natural -> Natural -> Maybe Natural

   ghc-internal	GHC.Internal.Numeric.Natural

   Natural subtraction. Returns Nothings for non-positive results.

3. statGetType_maybe :: Ptr CStat -> IO (Maybe IODeviceType)

   ghc-internal	GHC.Internal.System.Posix.Internals

   Unlike statGetType, statGetType_maybe will not throw an exception if the CStat refers to a unknown device type.

4. readMaybe :: Read a => String -> Maybe a

   ghc-internal	GHC.Internal.Text.Read

   Parse a string using the Read instance. Succeeds if there is exactly one valid result.

   >>> readMaybe "123" :: Maybe Int
   Just 123
   

   >>> readMaybe "hello" :: Maybe Int
   Nothing
   

5. nextMaybeF :: Int -> (Int -> Bool) -> (Int -> Int) -> (Maybe Int -> f a) -> f a

   massiv	Data.Massiv.Core.Index

   No documentation available.

6. scatMaybes :: Stream r ix (Maybe a) => Array r ix (Maybe a) -> Vector DS a

   massiv	Data.Massiv.Vector

   Keep all Maybes and discard the Nothings.

   Examples

7. simapMaybe :: Stream r ix a => (ix -> a -> Maybe b) -> Array r ix a -> Vector DS b

   massiv	Data.Massiv.Vector

   Similar to smapMaybe, but map with an index aware function.

   Examples

8. simapMaybeM :: forall r ix a b f . (Stream r ix a, Applicative f) => (ix -> a -> f (Maybe b)) -> Array r ix a -> f (Vector DS b)

   massiv	Data.Massiv.Vector

   Similar to smapMaybeM, but map with an index aware function.

   Examples

9. smapMaybe :: Stream r ix a => (a -> Maybe b) -> Array r ix a -> Vector DS b

   massiv	Data.Massiv.Vector

   Apply a function to each element of the array, while discarding Nothing and keeping the Maybe result.

   Examples

10. smapMaybeM :: forall r ix a b f . (Stream r ix a, Applicative f) => (a -> f (Maybe b)) -> Array r ix a -> f (Vector DS b)

    massiv	Data.Massiv.Vector

    Similar to smapMaybe, but with the Applicative function. Similar to mapMaybe id $ mapM f arr

    Examples

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