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1 | // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
1a4d82fc JJ |
11 | #![feature(box_syntax)] |
12 | ||
223e47cc | 13 | struct node_ { |
1a4d82fc | 14 | a: Box<cycle> |
223e47cc LB |
15 | } |
16 | ||
17 | enum cycle { | |
18 | node(node_), | |
19 | empty | |
20 | } | |
21 | fn main() { | |
c34b1796 | 22 | let mut x: Box<_> = box cycle::node(node_ {a: box cycle::empty}); |
223e47cc | 23 | // Create a cycle! |
970d7e83 | 24 | match *x { |
1a4d82fc | 25 | cycle::node(ref mut y) => { |
970d7e83 | 26 | y.a = x; //~ ERROR cannot move out of |
223e47cc | 27 | } |
1a4d82fc | 28 | cycle::empty => {} |
223e47cc LB |
29 | }; |
30 | } |