DoublyLinkedList.checked: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend as DoublyLinkedList
Lines 200-205 of bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend&start_line=200&end_line=205

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

def checked(~T: Data, op: E.Op<T>, r: DList<T> & Maybe<&2, E.Error>) -> DList<T> & E.Obs<T>:
  match r:
    case Tuple{s, None{}}:
      dispatch(~T, s, op)
    case Tuple{s, Some{e}}:
      (s, failed(~T, op, e))

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend&name=DList
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend&name=dispatch
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend&name=failed
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/types/doubly_linked_list.bend&name=Error
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/types/doubly_linked_list.bend&name=Obs
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/types/doubly_linked_list.bend&name=Op