File: borrowck-unsafe-static-mutable-borrows.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (25 lines) | stat: -rw-r--r-- 477 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
//@ run-pass

// Test file taken from issue 45129 (https://github.com/rust-lang/rust/issues/45129)

struct Foo {
    x: [usize; 2],
}

static mut SFOO: Foo = Foo { x: [23, 32] };

impl Foo {
    fn x(&mut self) -> &mut usize {
        &mut self.x[0]
    }
}

fn main() {
    unsafe {
        let sfoo: *mut Foo = &mut SFOO;
        //~^ WARN mutable reference to mutable static [static_mut_refs]
        let x = (*sfoo).x();
        (*sfoo).x[1] += 1;
        *x += 1;
    }
}