List.last_snoc: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/proofs/lib/list.bend as List
Lines 268-275 of bend-collections-laws-math@1.0.0.0/proofs/lib/list.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/proofs/lib/list.bend&start_line=268&end_line=275

import Base
import bend-collections-laws-math@1.0.0.0/spec/lib/common.bend as SC

def last_snoc(-A: Data, +xs: List<&2, A>, +x: A) -> {SC.last(A, SC.snoc(A, xs, x)) == Some{x} : Maybe<&2, A>}:
  match xs:
    case Nil{}:
      {==}
    case Con{h, Nil{}}:
      {==}
    case Con{h, Con{+h2, +t2}}:
      last_snoc(A, Con{h2, t2}, x)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/lib/common.bend&name=last
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/lib/common.bend&name=snoc