| // 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. |
| |
| fn main() { |
| let foo = &mut 1; |
| |
| let &mut x = foo; |
| x += 1; //~ ERROR re-assignment of immutable variable |
| |
| // explicitly mut-ify internals |
| let &mut mut x = foo; |
| x += 1; |
| |
| // check borrowing is detected successfully |
| let &mut ref x = foo; |
| *foo += 1; //~ ERROR cannot assign to `*foo` because it is borrowed |
| } |
