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1. maybeAtom :: Alternative p => p a -> Perms p (Maybe a)

   action-permutations	Control.Applicative.Permutation

   Like atom, but the action may be omitted from the permutation.

   • runPerms (maybeAtom p) = Just
     <$> p <|> pure
     Nothing

   When building permutation parsers, the argument parser should not match the empty string.

2. maybeQuot :: IntegralDomain d => d -> d -> Maybe d

   algebra	Numeric.Domain.Integral

   No documentation available.

3. maybeDelegate :: MonadDelegate r m => r -> m (Maybe a) -> m a

   alternators	Control.Monad.Delegate

   maybe delegate the Just value, or just use the r.

4. maybeAuthorized :: Yesod site => Route site -> Bool -> HandlerT site IO (Maybe (Route site))

   classy-prelude-yesod	ClassyPrelude.Yesod

   Return the same URL if the user is authorized to see it. Built on top of isAuthorized. This is useful for building page that only contain links to pages the user is allowed to see.

5. maybeC :: forall (m :: Type -> Type) i o a . Monad m => ConduitT i o m (Maybe a) -> ConduitT i o (MaybeT m) a

   classy-prelude-yesod	ClassyPrelude.Yesod

   Wrap the base monad in MaybeT Since 1.0.11

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

   classy-prelude-yesod	ClassyPrelude.Yesod

   The maybeToList function returns an empty list when given Nothing or a singleton list when given Just.

   Examples

   Basic usage:

   >>> maybeToList (Just 7)
   [7]
   

   >>> maybeToList Nothing
   []
   

   One can use maybeToList to avoid pattern matching when combined with a function that (safely) works on lists:

   >>> import GHC.Internal.Text.Read ( readMaybe )
   
   >>> sum $ maybeToList (readMaybe "3")
   3
   
   >>> sum $ maybeToList (readMaybe "")
   0
   

7. maybeAsSum :: (CoCartesian k, ObjectSum k u a, u ~ UnitObject k, Object k (Maybe a)) => k (Maybe a) (u + a)

   constrained-categories	Control.Category.Constrained

   No documentation available.

8. maybeFromSum :: (CoCartesian k, ObjectSum k u a, u ~ UnitObject k, Object k (Maybe a)) => k (u + a) (Maybe a)

   constrained-categories	Control.Category.Constrained

   No documentation available.

9. maybeAsSum :: (CoCartesian k, ObjectSum k u a, u ~ UnitObject k, Object k (Maybe a)) => k (Maybe a) (u + a)

   constrained-categories	Control.Category.Constrained.Prelude

   No documentation available.

10. maybeFromSum :: (CoCartesian k, ObjectSum k u a, u ~ UnitObject k, Object k (Maybe a)) => k (u + a) (Maybe a)

    constrained-categories	Control.Category.Constrained.Prelude

    No documentation available.

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