DlistStorage.length: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend as DlistStorage
Lines 115-117 of bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&start_line=115&end_line=117

import Base

def length(~T: Data, s: DList<T>) -> DList<T> & Nat:
  DL{+tag, +fresh, +free, +count, +head, +tail, +depth, +cap, vals, prevs, nexts} = s
  (DL{tag, fresh, free, count, head, tail, depth, cap, vals, prevs, nexts}, count)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  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/internal/dlist_storage.bend&name=DList