struct S<T,V> {
  v1: T,
  v2: V
}

fn main()
{
  let s1 = S{v1: "hi", v2: 5};
  let s2 = S{v1: true, v2: 3.14};
  
  println!("{} {}", s1.v1, s1.v2);
  println!("{} {}", s2.v1, s2.v2)
}