rust borrow and move

extern crate core;

#[deriving(Show)]

struct Foo {

    f : Box<int>

}

fn main(){

    let mut a = Foo {f: box 0};

    let y : &Foo;

    // out(&a);

    {

        let b = Foo {f: box 10};

        // b does not live long enough

        // can not y = &b;

        let  c = & mut a;

        // a borrowed by c

        //a.f = box 11;

        // c moved by y

        y = c;

        println!("{}", c.f);

        // cannot move out of `c` because it is borrowed

        //let c1 = c;

    }

    //a.f = box 11;

    println!("{}", y.f);

}

fn out(v: &Foo) {

    // borrow

    println!("{}", v);

}

fn test2(){

    let mut a:  Box<int> = box 1;

    // shared borrow

    let b = &a;

    let c = b;

    println!("{}", *b);

}