blob: 0bdc36750ae6d875f2882515fd05841c8dbdafa7 (
plain)
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Test that we can coerce an `@Object` to an `&Object`
trait Foo {
fn foo(&self) -> uint;
fn bar(&mut self) -> uint;
}
impl Foo for uint {
fn foo(&self) -> uint {
*self
}
fn bar(&mut self) -> uint {
*self += 1;
*self
}
}
fn do_it_mut(obj: &mut Foo) {
let x = obj.bar();
let y = obj.foo();
assert_eq!(x, y);
do_it_imm(obj, y);
}
fn do_it_imm(obj: &Foo, v: uint) {
let y = obj.foo();
assert_eq!(v, y);
}
pub fn main() {
let mut x = 22_u;
let obj = &mut x as &mut Foo;
do_it_mut(obj);
do_it_imm(obj, 23u);
do_it_mut(obj);
}
|
