PROOF.off.len_fast_le: def of bend-osdev-bytes@0.1.1.0
Import: import bend-osdev-bytes@0.1.1.0/PROOF.bend as PROOF
Lines 1168-1169 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=1168&end_line=1169

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

def off.len_fast_le(+n: Nat, +xs: List<&2, B.OctByte>, h: {Nat.is_le(n, B.w8s.len.fast(xs)) == True{} : Bool}) -> {Nat.is_le(n, List.length(&2, B.OctByte, xs)) == True{} : Bool}:
  Equal.trans(Bool, Nat.is_le(n, List.length(&2, B.OctByte, xs)), Nat.is_le(n, B.w8s.len.fast(xs)), True{}, Equal.cong(Nat, Bool, k => Nat.is_le(n, k), List.length(&2, B.OctByte, xs), B.w8s.len.fast(xs), F_len(xs)), h)

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.cong
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.trans
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/PROOF.bend&name=F_len
  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.len.fast