Vec3   :: struct;; x: F32; y: F32; z: F32
"+" :: (a: Vec3, b: Vec3): Vec3 ;; return Vec3{a.x+b.x, a.y+b.y, a.z+b.z}


main :: (): int
  a := Vec3{1,1,1}
  b := Vec3{2,3,4}
  c := a + b
  Assert(c.x == 3)
  Assert(c.y == 4)
  Assert(c.z == 5)

  return 0