| // Copyright 2015 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. |
| |
| use std::cell::Cell; |
| |
| #[derive(Debug)] |
| struct B<'a> { |
| a: [Cell<Option<&'a B<'a>>>; 2] |
| } |
| |
| impl<'a> B<'a> { |
| fn new() -> B<'a> { |
| B { a: [Cell::new(None), Cell::new(None)] } |
| } |
| } |
| |
| fn f() { |
| let (b1, b2, b3); |
| b1 = B::new(); |
| b2 = B::new(); |
| b3 = B::new(); |
| b1.a[0].set(Some(&b2)); |
| b1.a[1].set(Some(&b3)); |
| b2.a[0].set(Some(&b2)); |
| b2.a[1].set(Some(&b3)); |
| b3.a[0].set(Some(&b1)); |
| b3.a[1].set(Some(&b2)); |
| } |
| |
| fn main() { |
| f(); |
| } |