ProofFind.fgo_view: law of lawful-bytes@0.1.1.0
Import: import lawful-bytes@0.1.1.0/proof_find.bend as ProofFind
Lines 263-277 of lawful-bytes@0.1.1.0/proof_find.bend: https://jend.leeeet.dev/read.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&start_line=263&end_line=277

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

# hit says byte j is c, r holds byte j + 1, j + n = to.
law fgo_view:
  for +n: Nat
  for +hit: Bool
  for +len: U32
  for +t: P.Tree<U32>
  for +d: Nat
  for +j: U32
  for +to: U32
  for +c: U32
  for +hh: {U32.is_eq(C.AT(len, t, j), c) == hit : Bool}
  for +hn: {Nat.add(U32.to_nat(j), n) == U32.to_nat(to) : Nat}
  for +hto: {Nat.is_le(U32.to_nat(to), U32.to_nat(len)) == True{} : Bool}
  for +h: {D.ok(C.BT(len, t), d) == True{} : Bool}
  {U32.to_nat(Pair.snd(D.Bytes, U32, B.find.go(n, hit, (C.BT(len, t), C.AT(len, t, (j + 1 : U32))), j, to, c))) == Nat.add(U32.to_nat(j), D.run_len(D.slice(D.view(C.BT(len, t)), U32.to_nat(j), n), c)) : Nat}

Uses (38):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.drop
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.take
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair.snd
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=lawful-arrays@0.1.0.0/proof_base.bend&name=add_zero
  https://jend.leeeet.dev/definition.txt?path=lawful-arrays@0.1.0.0/proof_tree.bend&name=Tree
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/bytes.bend&name=at
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/bytes.bend&name=find.go
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=ok
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=run_len
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=slice
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=view
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_core.bend&name=AT
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_core.bend&name=BT
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_core.bend&name=at_pair_t
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_core.bend&name=inc_fits
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_core.bend&name=ok_d
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&name=add11
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&name=slice_cons
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&name=step_get
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&name=step_lt
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&name=step_lt4
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_find.bend&name=step_n
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_seq.bend&name=take_zero
  https://jend.leeeet.dev/definition.txt?path=lawful-words@0.1.0.0/proof_nat.bend&name=add_assoc