def key.put
import yaml-for-bend@0.1.1.0/scan.bend as Scanimport Base
503def key.put(st: Sc, required: Bool) -> Sc:
504 match st:
505 case Sc{+cur, ind, inds, flow, allowed, +tab, keys, out, +n, max}:
506 +rest = List.drop(&2, SKey, keys, 1n)
507 Sc{cur, ind, inds, flow, allowed, tab, SKey{True{}, required, n, cur.at(cur), tab, low.with(low.of(rest), True{}, cur.at(cur))} <> rest, out, n, max}