PROOF.off.take_len: def of bend-osdev-bytes@0.1.1.0
Import: import bend-osdev-bytes@0.1.1.0/PROOF.bend as PROOF
Lines 1330-1335 of bend-osdev-bytes@0.1.1.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-bytes@0.1.1.0/PROOF.bend&start_line=1330&end_line=1335

import Base
import bend-osdev-bytes@0.1.1.0/bytes.bend as B

def off.take_len(ws: List<&2, B.OctByte>) -> {B.w8s.take(List.length(&2, B.OctByte, ws), ws) == ws : List<&2, B.OctByte>}:
  match ws:
    case Nil{}:
      {==}
    case Con{h, t}:
      Equal.cong(List<&2, B.OctByte>, List<&2, B.OctByte>, l => Con{h, l}, B.w8s.take(List.length(&2, B.OctByte, t), t), t, off.take_len(t))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.cong
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=OctByte
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=w8s.take