Dns.labels.len: def of bend-kit-dns@0.7.0.0
Import: import bend-kit-dns@0.7.0.0/dns.bend as Dns
Lines 31-37 of bend-kit-dns@0.7.0.0/dns.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-dns@0.7.0.0/dns.bend&start_line=31&end_line=37

import Base

# QNAME's length without its final zero octet.
def labels.len(xs: List<&2, String>, +n: U32) -> U32:
  match xs:
    case Nil{}:
      n
    case Con{+l, t}:
      labels.len(t, (n + 1 + U32.from_nat(String.length(l)) : U32))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.length
  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.from_nat