PROOF.mask_append: def of bend-osdev-legacy-ciphers@0.1.0.0
Import: import bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend as PROOF
Lines 8491-8497 of bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend&start_line=8491&end_line=8497

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B

def mask_append(p: List<&2, U32>, +q: List<&2, U32>) -> {B.mask(B.append(p, q)) == B.append(B.mask(p), B.mask(q)) : List<&2, U32>}:
  match p:
    case Nil{}:
      {==}
    case Con{+h, +t}:
      %mask_append(t, q) : {Con{B.byte(h), B.mask(B.append(t, q))} == Con{B.byte(h), _} : List<&2, U32>}
      {==}

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=append
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=byte
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=mask