def project_insert

bend-collections@1.0.0.0 · src/containers/doubly_linked_list.bend:231

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

231def project_insert(~T: Data, r: DList<T> & E.Obs<T>) -> DList<T> & Result<&2, &2, E.Error, E.Handle>:
232  match r:
233    case Tuple{s, E.OInsert{x}}:
234      (s, x)
235    case Tuple{s, other}:
236      (s, Fail{E.StaleHandle{}})