blob: de3a5c799cbbfd1a00b695bec223d3988662ffd9 (
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
49
50
51
52
53
|
// Copyright 2014 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.
#![feature(box_syntax)]
struct Foo(Box<isize>, isize);
struct Bar(isize, isize);
fn main() {
let x: (Box<_>, _) = (box 1, 2);
let r = &x.0;
let y = x; //~ ERROR cannot move out of `x` because it is borrowed
r.use_ref();
let mut x = (1, 2);
let a = &x.0;
let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable because it is also borrowed as
a.use_ref();
let mut x = (1, 2);
let a = &mut x.0;
let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable more than once at a time
a.use_ref();
let x = Foo(box 1, 2);
let r = &x.0;
let y = x; //~ ERROR cannot move out of `x` because it is borrowed
r.use_ref();
let mut x = Bar(1, 2);
let a = &x.0;
let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable because it is also borrowed as
a.use_ref();
let mut x = Bar(1, 2);
let a = &mut x.0;
let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable more than once at a time
a.use_mut();
}
trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }
impl<T> Fake for T { }
|
