IntrusiveDoublyLinkedList.is_empty: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/containers/intrusive_doubly_linked_list.bend as IntrusiveDoublyLinkedList
Lines 41-43 of bend-collections@1.0.0.0/src/containers/intrusive_doubly_linked_list.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/containers/intrusive_doubly_linked_list.bend&start_line=41&end_line=43

import Base
import bend-collections@1.0.0.0/src/containers/internal/intrusive_list.bend as Impl

# O(1) empty-root query.
def is_empty(~S: Type, ~N: Data, ~H: Data, ~get_head: S -> H -> S & Maybe<&2, N>, s: S, +h: H) -> S & Bool:
  Impl.is_empty(~S, ~N, ~H, ~get_head, s, h)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=bend-collections@1.0.0.0/src/containers/internal/intrusive_list.bend&name=is_empty