29 lines
498 B
Rust
29 lines
498 B
Rust
//@ 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 _);
|
|
}
|