Lex.hex: def of emerging-ezjson@1.3.0.0
Import: import emerging-ezjson@1.3.0.0/src/lex.bend as Lex
Lines 126-130 of emerging-ezjson@1.3.0.0/src/lex.bend: https://jend.leeeet.dev/read.txt?path=emerging-ezjson@1.3.0.0/src/lex.bend&start_line=126&end_line=130

import Base

# a hex digit's value
def hex(ch: Char) -> U32:
  +x = Char.to_u32(ch)
  Bool.pick(U32, U32.is_le(x, 57), (x - 48 : U32),
    Bool.pick(U32, U32.is_ge(x, 97), (x - 87 : U32), (x - 55 : U32)))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char.to_u32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_ge
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub