Fields.num.fin: def of lawful-fields@0.1.1.0
Import: import lawful-fields@0.1.1.0/fields.bend as Fields
Lines 42-47 of lawful-fields@0.1.1.0/fields.bend: https://jend.leeeet.dev/read.txt?path=lawful-fields@0.1.1.0/fields.bend&start_line=42&end_line=47

import Base

def num.fin(+acc: U32, ok: Bool) -> Maybe<&2, U32>:
  match ok:
    case True{}:
      Some{acc}
    case False{}:
      None{}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32