Numeric.Lens

Documentation

base :: Integral a => Int -> Prism' String a

A prism that shows and reads integers in base-2 through base-36

>>> "100" ^? base 16
Just 256

>>> 1767707668033969 ^. re (base 36)
"helloworld"

integral :: (Integral a, Integral b) => Prism Integer Integer a b

This Prism extracts can be used to model the fact that every Integral type is a subset of Integer.

Embedding through the Prism only succeeds if the Integer would pass through unmodified when re-extracted.

Predefined bases

binary :: Integral a => Prism' String a

binary = base 2

octal :: Integral a => Prism' String a

octal = base 8

decimal :: Integral a => Prism' String a

decimal = base 10

hex :: Integral a => Prism' String a

hex = base 16