Format.Format.frac.start: def of bend-time-lib@0.4.0.1
Import: import bend-time-lib@0.4.0.1/format.bend as Format
Lines 166-173 of bend-time-lib@0.4.0.1/format.bend: https://jend.leeeet.dev/read.txt?path=bend-time-lib@0.4.0.1/format.bend&start_line=166&end_line=173

import Base

def Format.frac.start(
  s: String, off: Nat
) -> Result<&2, &2, Format.Error, Format.FracP>:
  match s:
    case SNil{}:
      Fail{BadFraction{off}}
    case SCon{+h, t}:
      Format.frac.go(t, 9n, Char.is_digit(h), h, 0, off, 0n)

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char.is_digit
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bend-time-lib@0.4.0.1/format.bend&name=Format.Error
  https://jend.leeeet.dev/definition.txt?path=bend-time-lib@0.4.0.1/format.bend&name=Format.FracP
  https://jend.leeeet.dev/definition.txt?path=bend-time-lib@0.4.0.1/format.bend&name=Format.frac.go