Data.Digit.DD

Documentation

class DD d where

Minimal complete definition

dD

Methods

dD :: Prism' d ()

xD :: d

Instances

DD ()

Methods

dD :: Prism' () ()

xD :: ()

DD HEXDigit

Methods

dD :: Prism' HEXDigit ()

xD :: HEXDigit

DD HeXDigit

Methods

dD :: Prism' HeXDigit ()

xD :: HeXDigit

parseD :: (DD d, CharParsing p) => p d

>>> parse (parseD <* eof) "test" "D" :: Either ParseError HEXDigit
Right HEXDigitD

>>> parse parseD "test" "Dxyz" :: Either ParseError HEXDigit
Right HEXDigitD

>>> isn't _Right (parse parseD "test" "xyz" :: Either ParseError HEXDigit)
True