| // Copyright 2018 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(nll)] |
| |
| fn flatten<'a, 'b, T>(x: &'a &'b T) -> &'a T { |
| x |
| } |
| |
| fn main() { |
| let mut x = "original"; |
| let y = &x; |
| let z = &y; |
| let w = flatten(z); |
| x = "modified"; |
| //~^ ERROR cannot assign to `x` because it is borrowed [E0506] |
| println!("{}", w); // prints "modified" |
| } |
