File: borrowck-move-mut-base-ptr.rs

package info (click to toggle)
rustc-web 1.85.0%2Bdfsg3-1~deb12u3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, bookworm-proposed-updates
  • size: 1,759,988 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,056; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (19 lines) | stat: -rw-r--r-- 417 bytes parent folder | download | duplicates (25) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
// Test that attempt to move `&mut` pointer while pointee is borrowed
// yields an error.
//
// Example from compiler/rustc_borrowck/borrowck/README.md



fn foo(t0: &mut isize) {
    let p: &isize = &*t0; // Freezes `*t0`
    let t1 = t0;        //~ ERROR cannot move out of `t0`
    *t1 = 22;
    p.use_ref();
}

fn main() {
}

trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
impl<T> Fake for T { }