blob: 063afe285fad3cb75d367c7be1eee5c4f243ac8b (
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
|
// 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 { a: isize, b: isize }
fn main() {
let mut x: Box<_> = box Foo { a: 1, b: 2 };
let (a, b) = (&mut x.a, &mut x.b);
//~^ ERROR cannot borrow `x` (via `x.b`) as mutable more than once at a time
//~| NOTE first mutable borrow occurs here (via `x.a`)
//~| NOTE second mutable borrow occurs here (via `x.b`)
let mut foo: Box<_> = box Foo { a: 1, b: 2 };
let (c, d) = (&mut foo.a, &foo.b);
//~^ ERROR cannot borrow `foo` (via `foo.b`) as immutable
//~| NOTE mutable borrow occurs here (via `foo.a`)
//~| NOTE immutable borrow occurs here (via `foo.b`)
}
//~^ NOTE first borrow ends here
//~^^ NOTE mutable borrow ends here
|
