struct Vec3f {
  Vec3f() : Vec3f(0, 0, 0) {}
  Vec3f(float x, float y, float z) : x(x), y(y), z(z) {}
  Vec3f& operator=(const Vec3f& v) = default;
  Vec3f& operator=(Vec3f&& v) = delete;
  Vec3f(const Vec3f& v) = default;
  Vec3f(Vec3f&& v) = delete;
  ~Vec3f() = default;

  float x, y, z;
};

Vec3f sum(const Vec3f& a, const Vec3f& b) {
  Vec3f out(0, 0, 0);
  out.x = a.x + b.x;
  out.y = a.y + b.y;
  out.z = a.z + b.z;
  return out;
}

int main(int argc, char **argv) {
  Vec3f a(1, 2, 3), b(4, 5, 6);
  Vec3f c = sum(a, b);
  return c.x > 1;
}