{-# LANGUAGE NoImplicitPrelude #-}
module Data.Digit.Class.D2(
D2(..)
, parse2
) where
import Control.Category (id)
import Control.Lens (Prism', (#))
import Data.Functor ((<$))
import Text.Parser.Char(CharParsing, char)
import Text.Parser.Combinators((<?>))
class D2 d where
d2 ::
Prism'
d
()
x2 ::
d
x2 =
Tagged () (Identity ()) -> Tagged d (Identity d)
forall d. D2 d => Prism' d ()
d2 (Tagged () (Identity ()) -> Tagged d (Identity d)) -> () -> d
forall t b. AReview t b -> b -> t
# ()
instance D2 () where
d2 :: p () (f ()) -> p () (f ())
d2 =
p () (f ()) -> p () (f ())
forall k (cat :: k -> k -> *) (a :: k). Category cat => cat a a
id
parse2 ::
(D2 d, CharParsing p) =>
p d
parse2 :: p d
parse2 =
d
forall d. D2 d => d
x2 d -> p Char -> p d
forall (f :: * -> *) a b. Functor f => a -> f b -> f a
<$ Char -> p Char
forall (m :: * -> *). CharParsing m => Char -> m Char
char Char
'2' p d -> String -> p d
forall (m :: * -> *) a. Parsing m => m a -> String -> m a
<?> String
"2"