def project_list

bend-collections@1.0.0.0 · src/containers/doubly_linked_list.bend:252

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

252def project_list(~T: Data, r: DList<T> & E.Obs<T>) -> DList<T> & List<&2, T>:
253  match r:
254    case Tuple{s, E.OList{x}}:
255      (s, x)
256    case Tuple{s, other}:
257      (s, Nil{})