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1. optionMaybe :: forall s (m :: Type -> Type) t u a . Stream s m t => ParsecT s u m a -> ParsecT s u m (Maybe a)

   parsec	Text.Parsec.Combinator

   optionMaybe p tries to apply parser p. If p fails without consuming input, it return Nothing, otherwise it returns Just the value returned by p.

2. optionMaybe :: forall s (m :: Type -> Type) t u a . Stream s m t => ParsecT s u m a -> ParsecT s u m (Maybe a)

   parsec	Text.ParserCombinators.Parsec.Combinator

   optionMaybe p tries to apply parser p. If p fails without consuming input, it return Nothing, otherwise it returns Just the value returned by p.

3. readDirStreamMaybe :: DirStream -> IO (Maybe FilePath)

   unix	System.Posix.Directory

   readDirStreamMaybe dp calls readdir to obtain the next directory entry (struct dirent) for the open directory stream dp. It returns the d_name member of that structure wrapped in a Just d_name if an entry was read and Nothing if the end of the directory stream was reached.

4. readDirStreamMaybe :: DirStream -> IO (Maybe RawFilePath)

   unix	System.Posix.Directory.ByteString

   readDirStreamMaybe dp calls readdir to obtain the next directory entry (struct dirent) for the open directory stream dp. It returns the d_name member of that structure wrapped in a Just d_name if an entry was read and Nothing if the end of the directory stream was reached.

5. readDirStreamMaybe :: DirStream -> IO (Maybe PosixPath)

   unix	System.Posix.Directory.PosixPath

   readDirStreamMaybe dp calls readdir to obtain the next directory entry (struct dirent) for the open directory stream dp. It returns the d_name member of that structure wrapped in a Just d_name if an entry was read and Nothing if the end of the directory stream was reached.

6. listToMaybeLast :: [a] -> Maybe a

   test-framework	Test.Framework.Providers.API

   No documentation available.

7. hoistMaybe :: MonadPlus m => Maybe a -> m a

   optparse-applicative	Options.Applicative.Internal

   No documentation available.

8. fuseBothMaybe :: forall (m :: Type -> Type) a b r1 c r2 . Monad m => ConduitT a b m r1 -> ConduitT b c m r2 -> ConduitT a c m (Maybe r1, r2)

   conduit	Data.Conduit

   Like fuseBoth, but does not force consumption of the Producer. In the case that the Producer terminates, the result value is provided as a Just value. If it does not terminate, then a Nothing value is returned. One thing to note here is that "termination" here only occurs if the Producer actually yields a Nothing value. For example, with the Producer mapM_ yield [1..5], if five values are requested, the Producer has not yet terminated. Termination only occurs when the sixth value is awaited for and the Producer signals termination. Since 1.2.4

9. mapOutputMaybe :: forall (m :: Type -> Type) o1 o2 i r . Monad m => (o1 -> Maybe o2) -> ConduitT i o1 m r -> ConduitT i o2 m r

   conduit	Data.Conduit

   Same as mapOutput, but use a function that returns Maybe values. Since 0.5.0

10. fuseBothMaybe :: forall (m :: Type -> Type) a b r1 c r2 . Monad m => ConduitT a b m r1 -> ConduitT b c m r2 -> ConduitT a c m (Maybe r1, r2)

    conduit	Data.Conduit.Internal

    Like fuseBoth, but does not force consumption of the Producer. In the case that the Producer terminates, the result value is provided as a Just value. If it does not terminate, then a Nothing value is returned. One thing to note here is that "termination" here only occurs if the Producer actually yields a Nothing value. For example, with the Producer mapM_ yield [1..5], if five values are requested, the Producer has not yet terminated. Termination only occurs when the sixth value is awaited for and the Producer signals termination. Since 1.2.4

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