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1. maybePeek :: (Ptr a -> IO b) -> Ptr a -> IO (Maybe b)

   base	Foreign.Marshal.Utils

   Convert a peek combinator into a one returning Nothing if applied to a nullPtr

2. maybeWith :: (a -> (Ptr b -> IO c) -> IO c) -> Maybe a -> (Ptr b -> IO c) -> IO c

   base	Foreign.Marshal.Utils

   Converts a withXXX combinator into one marshalling a value wrapped into a Maybe, using nullPtr to represent Nothing.

3. maybeToExceptT :: forall (m :: Type -> Type) e a . Functor m => e -> MaybeT m a -> ExceptT e m a

   transformers	Control.Monad.Trans.Maybe

   Convert a MaybeT computation to ExceptT, with a default exception value.

4. maybeToListT :: Applicative m => m (Maybe a) -> ListT m a

   directory	System.Directory.Internal

   No documentation available.

5. maybeResult :: Result r -> Maybe r

   attoparsec	Data.Attoparsec.ByteString

   Convert a Result value to a Maybe value. A Partial result is treated as failure.

6. maybeResult :: Result r -> Maybe r

   attoparsec	Data.Attoparsec.ByteString.Char8

   Convert a Result value to a Maybe value. A Partial result is treated as failure.

7. maybeResult :: Result r -> Maybe r

   attoparsec	Data.Attoparsec.ByteString.Lazy

   Convert a Result value to a Maybe value.

8. maybeResult :: Result r -> Maybe r

   attoparsec	Data.Attoparsec.Text

   Convert a Result value to a Maybe value. A Partial result is treated as failure.

9. maybeResult :: Result r -> Maybe r

   attoparsec	Data.Attoparsec.Text.Lazy

   Convert a Result value to a Maybe value.

10. maybeTimeoutImprovingIO :: Maybe Int -> ImprovingIO i f a -> ImprovingIO i f (Maybe a)

    test-framework	Test.Framework.Providers.API

    As timeoutImprovingIO, but don't bother applying a timeout to the action if Nothing is given as the number of microseconds to apply the time out for.

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