tests/ui/borrowck/borrowck-loan-blocks-mut-uniq.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

fn borrow<F>(v: &isize, f: F) where F: FnOnce(&isize) {
    f(v);
}


fn box_imm() {
    let mut v: Box<_> = Box::new(3);
    borrow(&*v,
           |w| { //~ ERROR cannot borrow `v` as mutable
            v = Box::new(4);
            assert_eq!(*v, 3);
            assert_eq!(*w, 4);
        })
}

fn main() {
}