def concat_step

bend-osdev-bytes@0.1.1.0 · PROOF.bend:717

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

717def concat_step(+ws: List<&2, B.OctByte>, +c: B.Octets, +acc: List<&2, B.OctByte>) -> {B.w8s.rev_onto(B.Octets.words(c), B.w8s.rev_onto(ws, acc)) == B.w8s.rev_onto(B.Octets.words(B.Octets.append(B.Octets{ws}, c)), acc) : List<&2, B.OctByte>}:
718  match c:
719    case B.Octets{+zs}:
720      %F_app(ws, zs) : {B.w8s.rev_onto(zs, B.w8s.rev_onto(ws, acc)) == B.w8s.rev_onto(_, acc) : List<&2, B.OctByte>}
721      Equal.sym(List<&2, B.OctByte>, B.w8s.rev_onto(List.append(&2, B.OctByte, ws, zs), acc), B.w8s.rev_onto(zs, B.w8s.rev_onto(ws, acc)), rev_app8(ws, zs, acc))