| // 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. |
| |
| #![feature(static_recursion)] |
| |
| static mut S: *const u8 = unsafe { &S as *const *const u8 as *const u8 }; |
| |
| struct StaticDoubleLinked { |
| prev: &'static StaticDoubleLinked, |
| next: &'static StaticDoubleLinked, |
| data: i32, |
| head: bool |
| } |
| |
| static L1: StaticDoubleLinked = StaticDoubleLinked{prev: &L3, next: &L2, data: 1, head: true}; |
| static L2: StaticDoubleLinked = StaticDoubleLinked{prev: &L1, next: &L3, data: 2, head: false}; |
| static L3: StaticDoubleLinked = StaticDoubleLinked{prev: &L2, next: &L1, data: 3, head: false}; |
| |
| |
| pub fn main() { |
| unsafe { assert_eq!(S, *(S as *const *const u8)); } |
| |
| let mut test_vec = Vec::new(); |
| let mut cur = &L1; |
| loop { |
| test_vec.push(cur.data); |
| cur = cur.next; |
| if cur.head { break } |
| } |
| assert_eq!(&test_vec, &[1,2,3]); |
| |
| let mut test_vec = Vec::new(); |
| let mut cur = &L1; |
| loop { |
| cur = cur.prev; |
| test_vec.push(cur.data); |
| if cur.head { break } |
| } |
| assert_eq!(&test_vec, &[3,2,1]); |
| } |