PROOF.truncate_view.go: def of lawful-bytes@0.1.1.0
Import: import lawful-bytes@0.1.1.0/PROOF.bend as PROOF
Lines 317-323 of lawful-bytes@0.1.1.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=lawful-bytes@0.1.1.0/PROOF.bend&start_line=317&end_line=323

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_ops.bend as O

def truncate_view.go(-b: D.Bytes, +n: U32, h: {Nat.is_le(U32.to_nat(n), D.size(b)) == True{} : Bool}, m_b: C.BMirror(b)) ->
  {D.view(B.truncate(b, n)) == List.take(&2, U32, D.view(b), U32.to_nat(n)) : List<&2, U32>}:
  (+l_b, m2_b) = m_b
  (+t_b, +e_b) = m2_b
  %e_b : {D.view(B.truncate(_, n)) == List.take(&2, U32, D.view(_), U32.to_nat(n)) : List<&2, U32>}
  +h_t = C.tr(x => {Nat.is_le(U32.to_nat(n), D.size(x)) == True{} : Bool}, b, l_b, t_b, e_b, h)
  O.truncate_view_t(l_b, t_b, n, h_t)

Uses (14):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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.is_le
  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.to_nat
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/bytes.bend&name=truncate
  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=size
  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=BMirror
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_core.bend&name=tr
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/proof_ops.bend&name=truncate_view_t