def project_unit

bend-collections@1.0.0.0 · src/containers/doubly_linked_list.bend:224

import Base
import bend-collections@1.0.0.0/src/containers/types/doubly_linked_list.bend as E

224def project_unit(~T: Data, r: DList<T> & E.Obs<T>) -> DList<T> & Result<&2, &2, E.Error, Unit>:
225  match r:
226    case Tuple{s, E.OUnit{x}}:
227      (s, x)
228    case Tuple{s, other}:
229      (s, Fail{E.StaleHandle{}})