| // Copyright 2012-2013 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. |
| |
| // Test that a `&mut` inside of an `&` is freezable. |
| |
| |
| struct MutSlice<'a, T:'a> { |
| data: &'a mut [T] |
| } |
| |
| fn get<'a, T>(ms: &'a MutSlice<'a, T>, index: usize) -> &'a T { |
| &ms.data[index] |
| } |
| |
| pub fn main() { |
| let mut data = [1, 2, 3]; |
| { |
| let slice = MutSlice { data: &mut data }; |
| slice.data[0] += 4; |
| let index0 = get(&slice, 0); |
| let index1 = get(&slice, 1); |
| let index2 = get(&slice, 2); |
| assert_eq!(*index0, 5); |
| assert_eq!(*index1, 2); |
| assert_eq!(*index2, 3); |
| } |
| assert_eq!(data[0], 5); |
| assert_eq!(data[1], 2); |
| assert_eq!(data[2], 3); |
| } |
