DlistStorage.pop_back_free: 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 429-431 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=429&end_line=431

import Base

def pop_back_free(~T: Data, s: DList<T>) -> DList<T> & Maybe<&2, T>:
  DL{+tag, +fresh, +free, count, +head, +tail, +depth, +cap, vals, prevs, nexts} = s
  pop_end(~T, tag, fresh, free, count, head, tail, depth, cap, vals, prevs, nexts, tail, U32.is_eq(tail, nil()))

Uses (6):
  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=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&name=DList
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&name=nil
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&name=pop_end