PROOF.app_nilu: def of bend-osdev-bytes@0.1.1.0
Import: import bend-osdev-bytes@0.1.1.0/PROOF.bend as PROOF
Lines 248-253 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=248&end_line=253

import Base

def app_nilu(+xs: List<&2, U32>) -> {List.append(&2, U32, xs, Nil{}) == xs : List<&2, U32>}:
  match xs:
    case Nil{}:
      {==}
    case Con{h, t}:
      Equal.cong(List<&2, U32>, List<&2, U32>, l => Con{h, l}, List.append(&2, U32, t, Nil{}), t, app_nilu(t))

Uses (4):
  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.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32