Codec.QRCode.Data.Result

Documentation

newtype Result a

This Maybe wrapper treats Just as success and Nothing as failure. There is no unexpected success <-> failure change.

Differences:

    instance Semigroup/Monoid Maybe where
       Nothing <> (Just x) = Just x
       mempty = Nothing
       stimes 0 (Just x) = Nothing

    instance Semigroup/Monoid Result where
       Nothing <> (Just x) = Nothing
       mempty = Just mempty
       stimes 0 (Just x) = Just (stimes 0 x)
  

Constructors

Result

Fields

• getResult :: Maybe a

Instances

Monad Result

Defined in Codec.QRCode.Data.Result

Methods

(>>=) :: Result a -> (a -> Result b) -> Result b

(>>) :: Result a -> Result b -> Result b

return :: a -> Result a

Functor Result

Defined in Codec.QRCode.Data.Result

Methods

fmap :: (a -> b) -> Result a -> Result b

(<$) :: a -> Result b -> Result a

MonadFix Result

Defined in Codec.QRCode.Data.Result

Methods

mfix :: (a -> Result a) -> Result a

MonadFail Result

Defined in Codec.QRCode.Data.Result

Methods

fail :: String -> Result a

Applicative Result

Defined in Codec.QRCode.Data.Result

Methods

pure :: a -> Result a

(<*>) :: Result (a -> b) -> Result a -> Result b

liftA2 :: (a -> b -> c) -> Result a -> Result b -> Result c

(*>) :: Result a -> Result b -> Result b

(<*) :: Result a -> Result b -> Result a

Foldable Result

Defined in Codec.QRCode.Data.Result

Methods

fold :: Monoid m => Result m -> m

foldMap :: Monoid m => (a -> m) -> Result a -> m

foldMap' :: Monoid m => (a -> m) -> Result a -> m

foldr :: (a -> b -> b) -> b -> Result a -> b

foldr' :: (a -> b -> b) -> b -> Result a -> b

foldl :: (b -> a -> b) -> b -> Result a -> b

foldl' :: (b -> a -> b) -> b -> Result a -> b

foldr1 :: (a -> a -> a) -> Result a -> a

foldl1 :: (a -> a -> a) -> Result a -> a

toList :: Result a -> [a]

null :: Result a -> Bool

length :: Result a -> Int

elem :: Eq a => a -> Result a -> Bool

maximum :: Ord a => Result a -> a

minimum :: Ord a => Result a -> a

sum :: Num a => Result a -> a

product :: Num a => Result a -> a

Traversable Result

Defined in Codec.QRCode.Data.Result

Methods

traverse :: Applicative f => (a -> f b) -> Result a -> f (Result b)

sequenceA :: Applicative f => Result (f a) -> f (Result a)

mapM :: Monad m => (a -> m b) -> Result a -> m (Result b)

sequence :: Monad m => Result (m a) -> m (Result a)

Eq1 Result

Defined in Codec.QRCode.Data.Result

Methods

liftEq :: (a -> b -> Bool) -> Result a -> Result b -> Bool

Ord1 Result

Defined in Codec.QRCode.Data.Result

Methods

liftCompare :: (a -> b -> Ordering) -> Result a -> Result b -> Ordering

Read1 Result

Defined in Codec.QRCode.Data.Result

Methods

liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Result a)

liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Result a]

liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Result a)

liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Result a]

Show1 Result

Defined in Codec.QRCode.Data.Result

Methods

liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Result a -> ShowS

liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Result a] -> ShowS

MonadZip Result

Defined in Codec.QRCode.Data.Result

Methods

mzip :: Result a -> Result b -> Result (a, b)

mzipWith :: (a -> b -> c) -> Result a -> Result b -> Result c

munzip :: Result (a, b) -> (Result a, Result b)

Alternative Result

Defined in Codec.QRCode.Data.Result

Methods

empty :: Result a

(<|>) :: Result a -> Result a -> Result a

some :: Result a -> Result [a]

many :: Result a -> Result [a]

MonadPlus Result

Defined in Codec.QRCode.Data.Result

Methods

mzero :: Result a

mplus :: Result a -> Result a -> Result a

Eq a => Eq (Result a)

Defined in Codec.QRCode.Data.Result

Methods

(==) :: Result a -> Result a -> Bool

(/=) :: Result a -> Result a -> Bool

Data a => Data (Result a)

Defined in Codec.QRCode.Data.Result

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Result a -> c (Result a)

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Result a)

toConstr :: Result a -> Constr

dataTypeOf :: Result a -> DataType

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Result a))

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Result a))

gmapT :: (forall b. Data b => b -> b) -> Result a -> Result a

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Result a -> r

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Result a -> r

gmapQ :: (forall d. Data d => d -> u) -> Result a -> [u]

gmapQi :: Int -> (forall d. Data d => d -> u) -> Result a -> u

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Result a -> m (Result a)

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Result a -> m (Result a)

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Result a -> m (Result a)

Ord a => Ord (Result a)

Defined in Codec.QRCode.Data.Result

Methods

compare :: Result a -> Result a -> Ordering

(<) :: Result a -> Result a -> Bool

(<=) :: Result a -> Result a -> Bool

(>) :: Result a -> Result a -> Bool

(>=) :: Result a -> Result a -> Bool

max :: Result a -> Result a -> Result a

min :: Result a -> Result a -> Result a

Read a => Read (Result a)

Defined in Codec.QRCode.Data.Result

Methods

readsPrec :: Int -> ReadS (Result a)

readList :: ReadS [Result a]

readPrec :: ReadPrec (Result a)

readListPrec :: ReadPrec [Result a]

Show a => Show (Result a)

Defined in Codec.QRCode.Data.Result

Methods

showsPrec :: Int -> Result a -> ShowS

show :: Result a -> String

showList :: [Result a] -> ShowS

Generic (Result a)

Defined in Codec.QRCode.Data.Result

Associated Types

type Rep (Result a) :: Type -> Type

Methods

from :: Result a -> Rep (Result a) x

to :: Rep (Result a) x -> Result a

Semigroup a => Semigroup (Result a)

Defined in Codec.QRCode.Data.Result

Methods

(<>) :: Result a -> Result a -> Result a

sconcat :: NonEmpty (Result a) -> Result a

stimes :: Integral b => b -> Result a -> Result a

Monoid a => Monoid (Result a)

Defined in Codec.QRCode.Data.Result

Methods

mempty :: Result a

mappend :: Result a -> Result a -> Result a

mconcat :: [Result a] -> Result a

Generic1 Result

Defined in Codec.QRCode.Data.Result

Associated Types

type Rep1 Result :: k -> Type

Methods

from1 :: forall (a :: k). Result a -> Rep1 Result a

to1 :: forall (a :: k). Rep1 Result a -> Result a

type Rep (Result a)

Defined in Codec.QRCode.Data.Result

type Rep (Result a) = D1 ('MetaData "Result" "Codec.QRCode.Data.Result" "qrcode-core-0.9.5-1EMl28erR9274Cy3SPNVRB" 'True) (C1 ('MetaCons "Result" 'PrefixI 'True) (S1 ('MetaSel ('Just "getResult") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe a))))

type Rep1 Result

Defined in Codec.QRCode.Data.Result

type Rep1 Result = D1 ('MetaData "Result" "Codec.QRCode.Data.Result" "qrcode-core-0.9.5-1EMl28erR9274Cy3SPNVRB" 'True) (C1 ('MetaCons "Result" 'PrefixI 'True) (S1 ('MetaSel ('Just "getResult") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec1 Maybe)))

result :: b -> (a -> b) -> Result a -> b