| // Copyright 2012-2014 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 mut x: Option<isize> = None; |
| match x { |
| None => { |
| // Note: on this branch, no borrow has occurred. |
| x = Some(0); |
| } |
| Some(ref i) => { |
| // But on this branch, `i` is an outstanding borrow |
| x = Some(*i+1); //~ ERROR cannot assign to `x` |
| } |
| } |
| x.clone(); // just to prevent liveness warnings |
| } |
