Data.Digit.Class.D2

Documentation

class D2 d where

Minimal complete definition

d2

Methods

d2 :: Prism' d ()

x2 :: d

Instances

D2 ()

Defined in Data.Digit.Class.D2

Methods

d2 :: Prism' () ()

x2 :: ()

D2 DecDigit

Defined in Data.Digit.Decimal

Methods

d2 :: Prism' DecDigit ()

x2 :: DecDigit

D2 HexDigit

Defined in Data.Digit.Hexadecimal.LowerCase

Methods

d2 :: Prism' HexDigit ()

x2 :: HexDigit

D2 HeXDigit

Defined in Data.Digit.Hexadecimal.MixedCase

Methods

d2 :: Prism' HeXDigit ()

x2 :: HeXDigit

D2 HEXDigit

Defined in Data.Digit.Hexadecimal.UpperCase

Methods

d2 :: Prism' HEXDigit ()

x2 :: HEXDigit

D2 OctDigit

Defined in Data.Digit.Octal

Methods

d2 :: Prism' OctDigit ()

x2 :: OctDigit

parse2 :: (D2 d, CharParsing p) => p d

>>> parse (parse2 <* eof) "test" "2" :: Either ParseError DecDigit
Right DecDigit2

>>> parse parse2 "test" "2xyz" :: Either ParseError DecDigit
Right DecDigit2

>>> isn't _Right (parse parse2 "test" "xyz" :: Either ParseError DecDigit)
True