6 struct Ints {sum: Box<isize>, values: Vec<isize> }
8 fn add_int(x: &mut Ints, v: isize) {
10 let mut values = Vec::new();
11 swap(&mut values, &mut x.values);
13 swap(&mut values, &mut x.values);
16 fn iter_ints<F>(x: &Ints, mut f: F) -> bool where F: FnMut(&isize) -> bool {
17 let l = x.values.len();
18 (0..l).all(|i| f(&x.values[i]))
22 let mut ints: Box<_> = Box::new(Ints {sum: Box::new(0), values: Vec::new()});
23 add_int(&mut *ints, 22);
24 add_int(&mut *ints, 44);
26 iter_ints(&*ints, |i| {
27 println!("isize = {:?}", *i);
31 println!("ints={:?}", ints);