law set_view_t

lawful-bytes@0.1.1.0 · proof_ops.bend:87

import Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-bytes@0.1.1.0/bytes.bend as B
import lawful-bytes@0.1.1.0/proof_core.bend as C
import lawful-arrays@0.1.0.0/proof_tree.bend as P

87law set_view_t:
88  for +len: U32
89  for +t: P.Tree<U32>
90  for +d: Nat
91  for +i: U32
92  for +v: U32
93  for +h: {D.ok(C.BT(len, t), d) == True{} : Bool}
94  for +hi: {Nat.is_lt(U32.to_nat(i), D.size(C.BT(len, t))) == True{} : Bool}
95  for +hv: {U32.is_lt(v, 256) == True{} : Bool}
96  {D.view(B.set(C.BT(len, t), i, v)) == List.set(&2, U32, D.view(C.BT(len, t)), U32.to_nat(i), v) : List<&2, U32>}