PROOF.F_app: def of bend-osdev-bytes@0.1.1.0
Import: import bend-osdev-bytes@0.1.1.0/PROOF.bend as PROOF
Lines 299-300 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=299&end_line=300

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

def F_app(+xs: List<&2, B.OctByte>, +ys: List<&2, B.OctByte>) -> {List.append(&2, B.OctByte, xs, ys) == B.w8s.append.fast(xs, ys) : List<&2, B.OctByte>}:
  Equal.sym(List<&2, B.OctByte>, B.w8s.append.fast(xs, ys), List.append(&2, B.OctByte, xs, ys), r8_rr(xs, Nil{}, ys))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  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=bend-osdev-bytes@0.1.1.0/PROOF.bend&name=r8_rr
  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.append.fast