Time.tz.number.go: def of bend-kit-time@0.3.0.0
Import: import bend-kit-time@0.3.0.0/time.bend as Time
Lines 760-767 of bend-kit-time@0.3.0.0/time.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-time@0.3.0.0/time.bend&start_line=760&end_line=767

import Base

# Three digits suffice for POSIX hour, day, and month fields.
def tz.number.go(s: String, +acc: U32, +seen: Bool) -> Maybe<&2, TzField>:
  match s:
    case SNil{}:
      tz.number.stop(seen, acc, SNil{})
    case SCon{Chr{+c}, +t}:
      tz.number.step(Bool.and(tz.digit(c), U32.is_lt(acc, 100)),
        c, t, acc, seen, _ => tz.number.go(t, ((acc * 10 + c - 48) : U32), True{}))

Uses (14):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_lt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=bend-kit-time@0.3.0.0/time.bend&name=TzField
  https://jend.leeeet.dev/definition.txt?path=bend-kit-time@0.3.0.0/time.bend&name=tz.digit
  https://jend.leeeet.dev/definition.txt?path=bend-kit-time@0.3.0.0/time.bend&name=tz.number.step
  https://jend.leeeet.dev/definition.txt?path=bend-kit-time@0.3.0.0/time.bend&name=tz.number.stop