law truncate_view

lawful-bytes@0.1.1.0 · LAWS.bend:243

import Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-bytes@0.1.1.0/bytes.bend as B

243law truncate_view:
244  for b: D.Bytes
245  for n: U32
246  for h: {Nat.is_le(U32.to_nat(n), D.size(b)) == True{} : Bool}
247  {D.view(B.truncate(b, n)) == List.take(&2, U32, D.view(b), U32.to_nat(n)) : List<&2, U32>}