{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE Safe #-}
{-# LANGUAGE DeriveGeneric #-}

-- | 'Solo' fills the /tuple gap/ with a singleton tuple.
--
-- 'Solo' /does not support/ the usual parenthesized tuple syntax.
--
-- 'Solo'
--
--   * has the expected laziness properties
--
--   * can be pattern-matched
--
--   * ships with instances for several standard type classes,
--     including all those supported by H98-standard tuples
--
--   * requires no language extensions, except for hierarchical modules
--
-- Note: on GHC-9.0 'getSolo' is not a record selector.

module Data.Tuple.Solo (
    Solo(Solo),
    getSolo,
) where

#ifdef MIN_VERSION_base_orphans
import Data.Orphans ()
#endif

#if MIN_VERSION_base(4,16,0)
import GHC.Tuple (Solo (Solo), getSolo)

#elif MIN_VERSION_base(4,15,0)
import GHC.Tuple (Solo (Solo))

-- | The 'getSolo' function extracts the Solo's getSolo member.
getSolo :: Solo a -> a
getSolo (Solo x) = x

#else

#if MIN_VERSION_base(4,9,0)
#define LIFTED_FUNCTOR_CLASSES 1
#else
#if MIN_VERSION_transformers(0,5,0)
#define LIFTED_FUNCTOR_CLASSES 1
#else
#ifdef MIN_VERSION_transformers_compat
#if MIN_VERSION_transformers_compat(0,5,0) && !(MIN_VERSION_transformers(0,4,0))
#define LIFTED_FUNCTOR_CLASSES 1
#endif
#endif
#endif
#endif

import Control.Applicative (Applicative (..))
import Control.Monad       (ap)
import Control.Monad.Fix   (MonadFix (..))
import Data.Data           (Data)
import Data.Foldable       (Foldable (..))
import Data.Ix             (Ix (..))
import Data.Monoid         (Monoid (..))
import Data.Semigroup      (Semigroup (..))
import Data.Traversable    (Traversable (..))
import Data.Typeable       (Typeable)

import Data.Functor.Classes (Eq1 (..), Ord1 (..), Show1 (..), Read1 (..))

#if !(MIN_VERSION_base(4,15,0))
import Data.Hashable        (Hashable (..))
import Data.Hashable.Lifted (Hashable1 (..), hashWithSalt1)
#endif

#if LIFTED_FUNCTOR_CLASSES
#if MIN_VERSION_base(4,10,0)
import Data.Functor.Classes (readData, readUnaryWith, liftReadListDefault, liftReadListPrecDefault)
#else
import Data.Functor.Classes (readsData, readsUnaryWith)
#endif
#endif

import GHC.Generics        (Generic, Generic1)
import Control.Monad.Zip   (MonadZip (..))

-- | Solo is the singleton tuple data type.
data Solo a = Solo { Solo a -> a
getSolo :: a }
  deriving
    ( Solo a -> Solo a -> Bool
(Solo a -> Solo a -> Bool)
-> (Solo a -> Solo a -> Bool) -> Eq (Solo a)
forall a. Eq a => Solo a -> Solo a -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Solo a -> Solo a -> Bool
$c/= :: forall a. Eq a => Solo a -> Solo a -> Bool
== :: Solo a -> Solo a -> Bool
$c== :: forall a. Eq a => Solo a -> Solo a -> Bool
Eq,Eq (Solo a)
Eq (Solo a)
-> (Solo a -> Solo a -> Ordering)
-> (Solo a -> Solo a -> Bool)
-> (Solo a -> Solo a -> Bool)
-> (Solo a -> Solo a -> Bool)
-> (Solo a -> Solo a -> Bool)
-> (Solo a -> Solo a -> Solo a)
-> (Solo a -> Solo a -> Solo a)
-> Ord (Solo a)
Solo a -> Solo a -> Bool
Solo a -> Solo a -> Ordering
Solo a -> Solo a -> Solo a
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
forall a. Ord a => Eq (Solo a)
forall a. Ord a => Solo a -> Solo a -> Bool
forall a. Ord a => Solo a -> Solo a -> Ordering
forall a. Ord a => Solo a -> Solo a -> Solo a
min :: Solo a -> Solo a -> Solo a
$cmin :: forall a. Ord a => Solo a -> Solo a -> Solo a
max :: Solo a -> Solo a -> Solo a
$cmax :: forall a. Ord a => Solo a -> Solo a -> Solo a
>= :: Solo a -> Solo a -> Bool
$c>= :: forall a. Ord a => Solo a -> Solo a -> Bool
> :: Solo a -> Solo a -> Bool
$c> :: forall a. Ord a => Solo a -> Solo a -> Bool
<= :: Solo a -> Solo a -> Bool
$c<= :: forall a. Ord a => Solo a -> Solo a -> Bool
< :: Solo a -> Solo a -> Bool
$c< :: forall a. Ord a => Solo a -> Solo a -> Bool
compare :: Solo a -> Solo a -> Ordering
$ccompare :: forall a. Ord a => Solo a -> Solo a -> Ordering
$cp1Ord :: forall a. Ord a => Eq (Solo a)
Ord,Solo a
Solo a -> Solo a -> Bounded (Solo a)
forall a. a -> a -> Bounded a
forall a. Bounded a => Solo a
maxBound :: Solo a
$cmaxBound :: forall a. Bounded a => Solo a
minBound :: Solo a
$cminBound :: forall a. Bounded a => Solo a
Bounded,ReadPrec [Solo a]
ReadPrec (Solo a)
Int -> ReadS (Solo a)
ReadS [Solo a]
(Int -> ReadS (Solo a))
-> ReadS [Solo a]
-> ReadPrec (Solo a)
-> ReadPrec [Solo a]
-> Read (Solo a)
forall a. Read a => ReadPrec [Solo a]
forall a. Read a => ReadPrec (Solo a)
forall a. Read a => Int -> ReadS (Solo a)
forall a. Read a => ReadS [Solo a]
forall a.
(Int -> ReadS a)
-> ReadS [a] -> ReadPrec a -> ReadPrec [a] -> Read a
readListPrec :: ReadPrec [Solo a]
$creadListPrec :: forall a. Read a => ReadPrec [Solo a]
readPrec :: ReadPrec (Solo a)
$creadPrec :: forall a. Read a => ReadPrec (Solo a)
readList :: ReadS [Solo a]
$creadList :: forall a. Read a => ReadS [Solo a]
readsPrec :: Int -> ReadS (Solo a)
$creadsPrec :: forall a. Read a => Int -> ReadS (Solo a)
Read,Typeable,Typeable (Solo a)
DataType
Constr
Typeable (Solo a)
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> Solo a -> c (Solo a))
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c (Solo a))
-> (Solo a -> Constr)
-> (Solo a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c (Solo a)))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Solo a)))
-> ((forall b. Data b => b -> b) -> Solo a -> Solo a)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> Solo a -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> Solo a -> r)
-> (forall u. (forall d. Data d => d -> u) -> Solo a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> Solo a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> Solo a -> m (Solo a))
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Solo a -> m (Solo a))
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Solo a -> m (Solo a))
-> Data (Solo a)
Solo a -> DataType
Solo a -> Constr
(forall d. Data d => c (t d)) -> Maybe (c (Solo a))
(forall b. Data b => b -> b) -> Solo a -> Solo a
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Solo a -> c (Solo a)
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (Solo a)
forall a. Data a => Typeable (Solo a)
forall a. Data a => Solo a -> DataType
forall a. Data a => Solo a -> Constr
forall a.
Data a =>
(forall b. Data b => b -> b) -> Solo a -> Solo a
forall a u.
Data a =>
Int -> (forall d. Data d => d -> u) -> Solo a -> u
forall a u. Data a => (forall d. Data d => d -> u) -> Solo a -> [u]
forall a r r'.
Data a =>
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
forall a r r'.
Data a =>
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
forall a (m :: * -> *).
(Data a, Monad m) =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
forall a (m :: * -> *).
(Data a, MonadPlus m) =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
forall a (c :: * -> *).
Data a =>
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (Solo a)
forall a (c :: * -> *).
Data a =>
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Solo a -> c (Solo a)
forall a (t :: * -> *) (c :: * -> *).
(Data a, Typeable t) =>
(forall d. Data d => c (t d)) -> Maybe (c (Solo a))
forall a (t :: * -> * -> *) (c :: * -> *).
(Data a, Typeable t) =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Solo a))
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Solo a -> u
forall u. (forall d. Data d => d -> u) -> Solo a -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (Solo a)
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Solo a -> c (Solo a)
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c (Solo a))
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Solo a))
$cSolo :: Constr
$tSolo :: DataType
gmapMo :: (forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
$cgmapMo :: forall a (m :: * -> *).
(Data a, MonadPlus m) =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
gmapMp :: (forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
$cgmapMp :: forall a (m :: * -> *).
(Data a, MonadPlus m) =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
gmapM :: (forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
$cgmapM :: forall a (m :: * -> *).
(Data a, Monad m) =>
(forall d. Data d => d -> m d) -> Solo a -> m (Solo a)
gmapQi :: Int -> (forall d. Data d => d -> u) -> Solo a -> u
$cgmapQi :: forall a u.
Data a =>
Int -> (forall d. Data d => d -> u) -> Solo a -> u
gmapQ :: (forall d. Data d => d -> u) -> Solo a -> [u]
$cgmapQ :: forall a u. Data a => (forall d. Data d => d -> u) -> Solo a -> [u]
gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
$cgmapQr :: forall a r r'.
Data a =>
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
$cgmapQl :: forall a r r'.
Data a =>
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r
gmapT :: (forall b. Data b => b -> b) -> Solo a -> Solo a
$cgmapT :: forall a.
Data a =>
(forall b. Data b => b -> b) -> Solo a -> Solo a
dataCast2 :: (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Solo a))
$cdataCast2 :: forall a (t :: * -> * -> *) (c :: * -> *).
(Data a, Typeable t) =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Solo a))
dataCast1 :: (forall d. Data d => c (t d)) -> Maybe (c (Solo a))
$cdataCast1 :: forall a (t :: * -> *) (c :: * -> *).
(Data a, Typeable t) =>
(forall d. Data d => c (t d)) -> Maybe (c (Solo a))
dataTypeOf :: Solo a -> DataType
$cdataTypeOf :: forall a. Data a => Solo a -> DataType
toConstr :: Solo a -> Constr
$ctoConstr :: forall a. Data a => Solo a -> Constr
gunfold :: (forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (Solo a)
$cgunfold :: forall a (c :: * -> *).
Data a =>
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c (Solo a)
gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Solo a -> c (Solo a)
$cgfoldl :: forall a (c :: * -> *).
Data a =>
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Solo a -> c (Solo a)
$cp1Data :: forall a. Data a => Typeable (Solo a)
Data
    , (forall x. Solo a -> Rep (Solo a) x)
-> (forall x. Rep (Solo a) x -> Solo a) -> Generic (Solo a)
forall x. Rep (Solo a) x -> Solo a
forall x. Solo a -> Rep (Solo a) x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
forall a x. Rep (Solo a) x -> Solo a
forall a x. Solo a -> Rep (Solo a) x
$cto :: forall a x. Rep (Solo a) x -> Solo a
$cfrom :: forall a x. Solo a -> Rep (Solo a) x
Generic
#if __GLASGOW_HASKELL__ >=706
    , (forall a. Solo a -> Rep1 Solo a)
-> (forall a. Rep1 Solo a -> Solo a) -> Generic1 Solo
forall a. Rep1 Solo a -> Solo a
forall a. Solo a -> Rep1 Solo a
forall k (f :: k -> *).
(forall (a :: k). f a -> Rep1 f a)
-> (forall (a :: k). Rep1 f a -> f a) -> Generic1 f
$cto1 :: forall a. Rep1 Solo a -> Solo a
$cfrom1 :: forall a. Solo a -> Rep1 Solo a
Generic1
#endif
    )

instance Show a => Show (Solo a) where
  showsPrec :: Int -> Solo a -> ShowS
showsPrec Int
d (Solo a
x) = Bool -> ShowS -> ShowS
showParen (Int
d Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
> Int
10) (ShowS -> ShowS) -> ShowS -> ShowS
forall a b. (a -> b) -> a -> b
$
      String -> ShowS
showString String
"Solo " ShowS -> ShowS -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> a -> ShowS
forall a. Show a => Int -> a -> ShowS
showsPrec Int
11 a
x

instance (Enum a) => Enum (Solo a) where
    succ :: Solo a -> Solo a
succ = (a -> a) -> Solo a -> Solo a
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap a -> a
forall a. Enum a => a -> a
succ
    pred :: Solo a -> Solo a
pred = (a -> a) -> Solo a -> Solo a
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap a -> a
forall a. Enum a => a -> a
pred
    toEnum :: Int -> Solo a
toEnum = a -> Solo a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (a -> Solo a) -> (Int -> a) -> Int -> Solo a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> a
forall a. Enum a => Int -> a
toEnum
    fromEnum :: Solo a -> Int
fromEnum (Solo a
x) = a -> Int
forall a. Enum a => a -> Int
fromEnum a
x

instance (Ix a) => Ix (Solo a) where
    range :: (Solo a, Solo a) -> [Solo a]
range   (Solo a
x, Solo a
y) = (a -> Solo a) -> [a] -> [Solo a]
forall a b. (a -> b) -> [a] -> [b]
map a -> Solo a
forall a. a -> Solo a
Solo ((a, a) -> [a]
forall a. Ix a => (a, a) -> [a]
range (a
x,a
y))
    index :: (Solo a, Solo a) -> Solo a -> Int
index   (Solo a
x, Solo a
y) (Solo a
z) = (a, a) -> a -> Int
forall a. Ix a => (a, a) -> a -> Int
index   (a
x,a
y) a
z
    inRange :: (Solo a, Solo a) -> Solo a -> Bool
inRange (Solo a
x, Solo a
y) (Solo a
z) = (a, a) -> a -> Bool
forall a. Ix a => (a, a) -> a -> Bool
inRange (a
x,a
y) a
z

instance Foldable Solo where
    fold :: Solo m -> m
fold (Solo m
m) = m
m
    foldMap :: (a -> m) -> Solo a -> m
foldMap a -> m
f (Solo a
x) = a -> m
f a
x
    foldr :: (a -> b -> b) -> b -> Solo a -> b
foldr a -> b -> b
f b
b (Solo a
x) = a -> b -> b
f a
x b
b
    foldl :: (b -> a -> b) -> b -> Solo a -> b
foldl b -> a -> b
f b
a (Solo a
x) = b -> a -> b
f b
a a
x
    foldr1 :: (a -> a -> a) -> Solo a -> a
foldr1 a -> a -> a
_f (Solo a
x) = a
x
    foldl1 :: (a -> a -> a) -> Solo a -> a
foldl1 a -> a -> a
_f (Solo a
x) = a
x

    -- TODO: add rest of the methods
#if MIN_VERSION_base(4,8,0)
    null :: Solo a -> Bool
null Solo a
_ = Bool
False
    length :: Solo a -> Int
length Solo a
_ = Int
1

    maximum :: Solo a -> a
maximum = Solo a -> a
forall a. Solo a -> a
getSolo
    minimum :: Solo a -> a
minimum = Solo a -> a
forall a. Solo a -> a
getSolo
    sum :: Solo a -> a
sum     = Solo a -> a
forall a. Solo a -> a
getSolo
    product :: Solo a -> a
product = Solo a -> a
forall a. Solo a -> a
getSolo

    toList :: Solo a -> [a]
toList (Solo a
a) = [a
a]
#endif

instance Traversable Solo where
    traverse :: (a -> f b) -> Solo a -> f (Solo b)
traverse a -> f b
f (Solo a
x) = (b -> Solo b) -> f b -> f (Solo b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap b -> Solo b
forall a. a -> Solo a
Solo (a -> f b
f a
x)
    sequenceA :: Solo (f a) -> f (Solo a)
sequenceA (Solo f a
x) = (a -> Solo a) -> f a -> f (Solo a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap a -> Solo a
forall a. a -> Solo a
Solo f a
x


instance Functor Solo where
    fmap :: (a -> b) -> Solo a -> Solo b
fmap a -> b
f (Solo a
x) = b -> Solo b
forall a. a -> Solo a
Solo (a -> b
f a
x)

instance Applicative Solo where
    pure :: a -> Solo a
pure = a -> Solo a
forall a. a -> Solo a
Solo

    Solo a -> b
f <*> :: Solo (a -> b) -> Solo a -> Solo b
<*> Solo a
x = b -> Solo b
forall a. a -> Solo a
Solo (a -> b
f a
x)
    Solo a
_ *> :: Solo a -> Solo b -> Solo b
*> Solo b
x = Solo b
x
    Solo a
x <* :: Solo a -> Solo b -> Solo a
<* Solo b
_ = Solo a
x

#if MIN_VERSION_base(4,10,0)
    liftA2 :: (a -> b -> c) -> Solo a -> Solo b -> Solo c
liftA2 a -> b -> c
f (Solo a
x) (Solo b
y) = c -> Solo c
forall a. a -> Solo a
Solo (a -> b -> c
f a
x b
y)
#endif

instance Monad Solo where
    return :: a -> Solo a
return = a -> Solo a
forall (f :: * -> *) a. Applicative f => a -> f a
pure
    >> :: Solo a -> Solo b -> Solo b
(>>) = Solo a -> Solo b -> Solo b
forall (f :: * -> *) a b. Applicative f => f a -> f b -> f b
(*>)
    Solo a
x >>= :: Solo a -> (a -> Solo b) -> Solo b
>>= a -> Solo b
f = a -> Solo b
f a
x

instance Semigroup a => Semigroup (Solo a) where
    Solo a
x <> :: Solo a -> Solo a -> Solo a
<> Solo a
y = a -> Solo a
forall a. a -> Solo a
Solo (a
x a -> a -> a
forall a. Semigroup a => a -> a -> a
<> a
y)

instance Monoid a => Monoid (Solo a) where
    mempty :: Solo a
mempty = a -> Solo a
forall a. a -> Solo a
Solo a
forall a. Monoid a => a
mempty
    mappend :: Solo a -> Solo a -> Solo a
mappend (Solo a
x) (Solo a
y) = a -> Solo a
forall a. a -> Solo a
Solo (a -> a -> a
forall a. Monoid a => a -> a -> a
mappend a
x a
y)

instance MonadFix Solo where
    mfix :: (a -> Solo a) -> Solo a
mfix a -> Solo a
f = let a :: Solo a
a = a -> Solo a
f (Solo a -> a
forall a. Solo a -> a
getSolo Solo a
a) in Solo a
a

instance MonadZip Solo where
    mzipWith :: (a -> b -> c) -> Solo a -> Solo b -> Solo c
mzipWith a -> b -> c
f (Solo a
a) (Solo b
b) = c -> Solo c
forall a. a -> Solo a
Solo (a -> b -> c
f a
a b
b)

#ifdef LIFTED_FUNCTOR_CLASSES
instance Eq1 Solo where
  liftEq :: (a -> b -> Bool) -> Solo a -> Solo b -> Bool
liftEq a -> b -> Bool
eq (Solo a
a) (Solo b
b) = a
a a -> b -> Bool
`eq` b
b

instance Ord1 Solo where
  liftCompare :: (a -> b -> Ordering) -> Solo a -> Solo b -> Ordering
liftCompare a -> b -> Ordering
cmp (Solo a
a) (Solo b
b) = a -> b -> Ordering
cmp a
a b
b

instance Read1 Solo where
#if MIN_VERSION_base(4,10,0)
    liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Solo a)
liftReadPrec ReadPrec a
rp ReadPrec [a]
_ = ReadPrec (Solo a) -> ReadPrec (Solo a)
forall a. ReadPrec a -> ReadPrec a
readData (ReadPrec a -> String -> (a -> Solo a) -> ReadPrec (Solo a)
forall a t. ReadPrec a -> String -> (a -> t) -> ReadPrec t
readUnaryWith ReadPrec a
rp String
"Solo" a -> Solo a
forall a. a -> Solo a
Solo)

    liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Solo a]
liftReadListPrec = ReadPrec a -> ReadPrec [a] -> ReadPrec [Solo a]
forall (f :: * -> *) a.
Read1 f =>
ReadPrec a -> ReadPrec [a] -> ReadPrec [f a]
liftReadListPrecDefault
    liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Solo a]
liftReadList     = (Int -> ReadS a) -> ReadS [a] -> ReadS [Solo a]
forall (f :: * -> *) a.
Read1 f =>
(Int -> ReadS a) -> ReadS [a] -> ReadS [f a]
liftReadListDefault
#else
    liftReadsPrec rp _ = readsData $ readsUnaryWith rp "Solo" Solo
#endif

instance Show1 Solo where
    liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Solo a -> ShowS
liftShowsPrec Int -> a -> ShowS
sp [a] -> ShowS
_ Int
d (Solo a
x) = Bool -> ShowS -> ShowS
showParen (Int
d Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
> Int
10) (ShowS -> ShowS) -> ShowS -> ShowS
forall a b. (a -> b) -> a -> b
$
      String -> ShowS
showString String
"Solo " ShowS -> ShowS -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> a -> ShowS
sp Int
11 a
x

#else
instance Eq1 Solo where eq1 = (==)
instance Ord1 Solo where compare1 = compare
instance Read1 Solo where readsPrec1 = readsPrec
instance Show1 Solo where showsPrec1 = showsPrec
#endif

#endif

#if !(MIN_VERSION_base(4,15,0))
-- | @since 0.3.1
instance Hashable a => Hashable (Solo a) where
    hashWithSalt :: Int -> Solo a -> Int
hashWithSalt = Int -> Solo a -> Int
forall (f :: * -> *) a.
(Hashable1 f, Hashable a) =>
Int -> f a -> Int
hashWithSalt1

-- | @since 0.3.1
instance Hashable1 Solo where
    liftHashWithSalt :: (Int -> a -> Int) -> Int -> Solo a -> Int
liftHashWithSalt Int -> a -> Int
h Int
salt (Solo a
a) = Int -> a -> Int
h Int
salt a
a
#endif