Spec.vadd: def of bendtorch@1.3.0.0
Import: import bendtorch@1.3.0.0/spec.bend as Spec
Lines 19-27 of bendtorch@1.3.0.0/spec.bend: https://jend.leeeet.dev/read.txt?path=bendtorch@1.3.0.0/spec.bend&start_line=19&end_line=27

import Base

# vector sum; the shorter vector counts as padded with zeros
def vadd(xs: List<&2, Nat>, ys: List<&2, Nat>) -> List<&2, Nat>:
  match xs ys:
    case Nil{} _:
      ys
    case Con{x, xt} Nil{}:
      Con{x, xt}
    case Con{x, xt} Con{y, yt}:
      Nat.add(x, y) <> vadd(xt, yt)

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