Deque.Deque.count: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/deque.bend as Deque
Lines 36-42 of bend-kit-collections@0.1.4.1/deque.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/deque.bend&start_line=36&end_line=42

import Base

# a list and its length, in one pass that hands the list back
def Deque.count(a, -A: Kind(a), xs: List<a, A>) -> List<a, A> & Nat:
  match xs:
    case Nil{}:
      (Nil{}, 0n)
    case h <> t:
      Deque.count.put(a, A, h, Deque.count(a, A, t))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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-kit-collections@0.1.4.1/deque.bend&name=Deque.count.put