struct vec2 (x, y);

def vec2_add(a, b) {
  vec2(a.x + b.x, a.y + b.y);
}

def main() {
  x = [1, 2, 3];
  print("hi! length of x is #{len(x)}");

  z = lambda(n) { n*2 };

  y = vec2(1, 5);
  print(vec2_add(vec2(1, 1), y)); // prints <vec2 x=2 y=6>
}

main();