File: mir_autoderef.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 (28 lines) | stat: -rw-r--r-- 498 bytes parent folder | download | duplicates (5)
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
26
27
28
//@ run-pass
use std::ops::{Deref, DerefMut};

pub struct MyRef(u32);

impl Deref for MyRef {
    type Target = u32;
    fn deref(&self) -> &u32 { &self.0 }
}

impl DerefMut for MyRef {
    fn deref_mut(&mut self) -> &mut u32 { &mut self.0 }
}


fn deref(x: &MyRef) -> &u32 {
    x
}

fn deref_mut(x: &mut MyRef) -> &mut u32 {
    x
}

fn main() {
    let mut r = MyRef(2);
    assert_eq!(deref(&r) as *const _, &r.0 as *const _);
    assert_eq!(deref_mut(&mut r) as *mut _, &mut r.0 as *mut _);
}