def num
import bend-net-json@0.3.0.0/json.bend as Jsonimport Base
110def num(s: String) -> Maybe<&2, Next>:
111 match s:
112 case SNil{}:
113 None{}
114 case SCon{Chr{+c}, t}:
115 num.go(t, c, 0, SNil{}, U32.is_eq(num.trans(0, c), 99))