law set_view

lawful-arrays@0.1.0.0 · LAWS.bend:79

import Base
import lawful-arrays@0.1.0.0/defs.bend as D

79# Array.set replaces leaf i (modulo the size) and nothing else.
80law set_view:
81  for -T: Data
82  for a: Array<T>
83  for d: Nat
84  for i: U32
85  for v: T
86  for hf: {D.full(T, a, d) == True{} : Bool}
87  for hd: {Nat.is_lt(d, 32n) == True{} : Bool}
88  {D.view(T, Array.set(T, a, i, v)) == List.set(&2, T, D.view(T, a), D.slot(i, d), v) : List<&2, T>}