File: borrowck-loan-blocks-mut-uniq.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (18 lines) | stat: -rw-r--r-- 314 bytes parent folder | download | duplicates (11) 
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() {
}