def entry_value

bend-collections@1.0.0.0 · src/containers/balanced_search_tree.bend:334

import Base

334def entry_value(~K: Data, ~V: Data, ~cmp: K -> K -> Cmp, k: Maybe<&2, K>, r: TreeMap<K, V, cmp> & Maybe<&2, V>) -> TreeMap<K, V, cmp> & Maybe<&2, Entry<K, V>>:
335  match k r:
336    case Some{key} Tuple{m, Some{v}}:
337      (m, Some{Entry{key, v}})
338    case _ Tuple{m, value}:
339      (m, None{})