def is_empty

bend-collections@1.0.0.0 · src/containers/intrusive_doubly_linked_list.bend:41

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

41# O(1) empty-root query.
42def is_empty(~S: Type, ~N: Data, ~H: Data, ~get_head: S -> H -> S & Maybe<&2, N>, s: S, +h: H) -> S & Bool:
43  Impl.is_empty(~S, ~N, ~H, ~get_head, s, h)