DlistStorage.step_back: 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 338-340 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=338&end_line=340

import Base

def step_back(~T: Data, c: Cur<T>) -> Cur<T>:
  C{vals, prevs, acc, +at} = c
  step_v(~T, prevs, acc, at, Array.get(Maybe<&2, T>, vals, slot(at)))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array.get
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&name=Cur
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&name=slot
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend&name=step_v