| // 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. |
| |
| use std::ops::AddAssign; |
| |
| struct Int(i32); |
| |
| impl AddAssign for Int { |
| fn add_assign(&mut self, _: Int) { |
| unimplemented!() |
| } |
| } |
| |
| fn main() { |
| let mut x = Int(1); |
| x //~ error: use of moved value: `x` |
| //~^ value used here after move |
| += |
| x; //~ value moved here |
| |
| let y = Int(2); |
| //~^ HELP make this binding mutable |
| //~| SUGGESTION mut y |
| y //~ error: cannot borrow immutable local variable `y` as mutable |
| //~| cannot borrow |
| += |
| Int(1); |
| } |
