Deque.split: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/containers/deque.bend as Deque
Lines 31-38 of bend-collections@1.0.0.0/src/containers/deque.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/containers/deque.bend&start_line=31&end_line=38

import Base

def split(~T: Data, n: Nat, xs: List<&2, T>) -> List<&2, T> & List<&2, T>:
  match n xs:
    case 0n ys:
      (Nil{}, List.reverse(&2, T, ys))
    case 1n+p Nil{}:
      (Nil{}, Nil{})
    case 1n+p Con{x, tail}:
      split_cons(~T, x, split(~T, p, tail))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.reverse
  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/deque.bend&name=split_cons