def arr.depth
import bend-toon-codec@0.1.0.0/src/frame.bend as Frameimport Base
import bend-toon-codec@0.1.0.0/src/split.bend as S
206def arr.depth(+f: Fr) -> U32:
207 match f:
208 case FLst{d, a, n, c, xs}:
209 arr.depth.if(U32.is_zero(c), d)
210 case FTab{d, a, n, c, dl, ks, xs}:
211 arr.depth.if(U32.is_zero(c), d)
212 case _:
213 S.none()