DlistStorage.set_checked: 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 246-255 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=246&end_line=255

import Base
import bend-collections@1.0.0.0/src/containers/types/internal_dlist.bend as E

# set swaps the new value in: one indexed access when the element is live;
# a stale slot is None and is written back as None.
def set_checked(~T: Data, ok: Bool, +tag: U32, +fresh: U32, +free: U32, +count: Nat, +head: U32, +tail: U32, +depth: Nat, +cap: U32, vals: Array<Maybe<&2, T>>, prevs: Array<U32>, nexts: Array<U32>, +i: U32, +x: T, same: Bool) -> DList<T> & Result<&2, &2, E.Error, Unit>:
  match ok same:
    case _ False{}:
      (DL{tag, fresh, free, count, head, tail, depth, cap, vals, prevs, nexts}, Fail{E.ForeignHandle{}})
    case False{} True{}:
      (DL{tag, fresh, free, count, head, tail, depth, cap, vals, prevs, nexts}, Fail{E.StaleHandle{}})
    case True{} True{}:
      set_fin(~T, tag, fresh, free, count, head, tail, depth, cap, prevs, nexts, i, x, Array.swap(Maybe<&2, T>, vals, i, Some{x}))

Uses (13):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array.swap
  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=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  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=set_fin
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/types/internal_dlist.bend&name=Error