def node_key

bend-collections@1.0.0.0 · src/containers/balanced_search_tree.bend:217

import Base

217def node_key(~K: Data, n: Node<K>) -> Maybe<&2, K>:
218  match n:
219    case Free{x}:
220      None{}
221    case N{c, l, r, p, k}:
222      Some{k}