union IntOrFloat {
    i: i32,
    f: f32
}

fn process_value(iof: IntOrFloat){
unsafe {
 match iof {
  IntOrFloat { i: 42 } => {
    println!("meaning of life value");
    }
    IntOrFloat { f } => {
        println!("value = {}", f)
   }
  }
 }
}

fn main() {
    let mut iof = IntOrFloat { i: 123 };
    iof.i = 234;

    let value = unsafe { iof.i };
    println!("iof.i = {}", value);

    process_value(IntOrFloat{i:5});
}