PROOF.li.len_drop: def of bend-osdev-cipher-modes@0.1.0.0
Import: import bend-osdev-cipher-modes@0.1.0.0/PROOF.bend as PROOF
Lines 251-264 of bend-osdev-cipher-modes@0.1.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-cipher-modes@0.1.0.0/PROOF.bend&start_line=251&end_line=264

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

def li.len_drop(+n: Nat, +xs: List<&2, U32>) -> {B.len(B.drop(n, xs)) == Nat.sub(B.len(xs), n) : Nat}:
  match n:
    case 0n:
      match xs:
        case Nil{}:
          {==}
        case Con{+h, +t}:
          {==}
    case 1n+p:
      match xs:
        case Nil{}:
          {==}
        case Con{+h, +t}:
          li.len_drop(p, t)

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub
  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=drop
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=len