//#![allow(unused)]
use core::fmt::Debug;

#[derive(Debug, Clone, Copy)]
struct MyStruct(i32);

#[derive(Debug, Clone, Copy)]
enum MyEnum{FOO, BAR}


fn by_val<T: Debug + Copy>(arg1:T) {
   println!("by_val");
   dbg!(arg1);
}

fn by_ref<T: Debug>(arg1:& T) {
   println!("by_ref");
   dbg!(arg1);
}

fn by_mut<T: Debug>(arg1:&mut T) {
   println!("by_mute_ref");
   dbg!(arg1);

}

fn set_to_bar(arg: &mut MyEnum) {
    arg = MyEnum::BAR;
}

fn main() {
    let mut myarg = MyStruct(33);

    by_ref(&myarg);
    by_mut(&mut myarg);
    by_val(myarg);

    let mut myint = 31;

    by_val(myint);
    by_mut(&mut myint);
    by_ref(&myint);

    let mut myenum = MyEnum::FOO;
    by_mut(&mut myenum);
    set_to_bar(&mut myenum);
    by_ref(&myenum);
    by_val(myenum);


}