Util.nats_add: def of unified-nsga-iii@0.2.2.0
Import: import unified-nsga-iii@0.2.2.0/util.bend as Util
Lines 123-132 of unified-nsga-iii@0.2.2.0/util.bend: https://jend.leeeet.dev/read.txt?path=unified-nsga-iii@0.2.2.0/util.bend&start_line=123&end_line=132

import Base

def nats_add(a: List<&2, Nat>, b: List<&2, Nat>) -> List<&2, Nat>:
  match a b:
    case Nil{} Nil{}:
      Nil{}
    case x <> xs y <> ys:
      Nat.add(x, y) <> nats_add(xs, ys)
    case Nil{} ys:
      ys
    case xs Nil{}:
      xs

Uses (3):
  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=Nat.add