Data.Digit.DA

Documentation

class DA d where

Minimal complete definition

dA

Methods

dA :: Prism' d ()

xA :: d

Instances

DA ()

Methods

dA :: Prism' () ()

xA :: ()

DA HEXDigit

Methods

dA :: Prism' HEXDigit ()

xA :: HEXDigit

DA HeXDigit

Methods

dA :: Prism' HeXDigit ()

xA :: HeXDigit

parseA :: (DA d, CharParsing p) => p d

>>> parse (parseA <* eof) "test" "A" :: Either ParseError HEXDigit
Right HEXDigitA

>>> parse parseA "test" "Axyz" :: Either ParseError HEXDigit
Right HEXDigitA

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