def find_view.go

lawful-bytes@0.1.1.0 · PROOF.bend:110

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-bytes@0.1.1.0/proof_find.bend as F

110def find_view.go(-b: D.Bytes, +d: Nat, +from: U32, +to: U32, +c: U32, h: {D.ok(b, d) == True{} : Bool}, hft: {U32.is_le(from, to) == True{} : Bool}, ht: {Nat.is_le(U32.to_nat(to), D.size(b)) == True{} : Bool}, hc: {U32.is_lt(c, 256) == True{} : Bool}, m_b: C.BMirror(b)) ->
111  {U32.to_nat(Pair.snd(D.Bytes, U32, B.find(b, from, to, c))) == D.first(D.view(b), U32.to_nat(from), U32.to_nat(to), c) : Nat}:
112  (+l_b, m2_b) = m_b
113  (+t_b, +e_b) = m2_b
114  %e_b : {U32.to_nat(Pair.snd(D.Bytes, U32, B.find(_, from, to, c))) == D.first(D.view(_), U32.to_nat(from), U32.to_nat(to), c) : Nat}
115  +h_t = C.tr(x => {D.ok(x, d) == True{} : Bool}, b, l_b, t_b, e_b, h)
116  +ht_t = C.tr(x => {Nat.is_le(U32.to_nat(to), D.size(x)) == True{} : Bool}, b, l_b, t_b, e_b, ht)
117  F.find_view_t(l_b, t_b, d, from, to, c, h_t, hft, ht_t, hc)