PROOF.h.elen_del_hit: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/PROOF.bend as PROOF
Lines 2248-2257 of bend-kit-collections@0.1.4.1/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/PROOF.bend&start_line=2248&end_line=2257

import Base
import bend-kit-collections@0.1.4.1/hmap.bend as M

def h.elen_del_hit(
  ~K: Data, ~V: Data, ~eq: K -> K -> Bool, xs: List<&2, M.Entry<K, V>>, +k: K, -w: V,
  hit: {M.HMap.entries.get(~K, ~V, ~eq, xs, k) == Some{w} : Maybe<&2, V>}
) -> {1n+h.len(K, V, M.HMap.entries.del(~K, ~V, ~eq, xs, k)) == h.len(K, V, xs) : Nat}:
  match xs:
    case Nil{}:
      h.none_some({1n == 0n : Nat}, V, w, hit)
    case Con{M.Entry{+key, +val}, +rest}:
      h.elen_del_hit.c(~K, ~V, ~eq, key, val, rest, k, w, eq(k, key), hit,
        e => h.elen_del_hit(~K, ~V, ~eq, rest, k, w, e))

Uses (10):
  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=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/PROOF.bend&name=h.elen_del_hit.c
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/PROOF.bend&name=h.len
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/PROOF.bend&name=h.none_some
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=Entry
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=HMap.entries.del
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=HMap.entries.get