Scan.hex.digit: def of gralha-text-scan@0.1.0.1
Import: import gralha-text-scan@0.1.0.1/scan.bend as Scan
Lines 244-247 of gralha-text-scan@0.1.0.1/scan.bend: https://jend.leeeet.dev/read.txt?path=gralha-text-scan@0.1.0.1/scan.bend&start_line=244&end_line=247

import Base

def hex.digit(+c: U32) -> U32:
  choose(U32, digit(c), (c - 48 : U32),
    choose(U32, U32.is_ge(c, 65) && U32.is_le(c, 70), (c - 55 : U32),
      choose(U32, U32.is_ge(c, 97) && U32.is_le(c, 102), (c - 87 : U32), 0)))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  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
  https://jend.leeeet.dev/definition.txt?path=gralha-text-scan@0.1.0.1/scan.bend&name=choose
  https://jend.leeeet.dev/definition.txt?path=gralha-text-scan@0.1.0.1/scan.bend&name=digit