| // Copyright 2016 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(rustc_attrs)] |
| macro_rules! width( |
| ($this:expr) => { |
| $this.width.unwrap() |
| //~^ ERROR cannot use `self.width` because it was mutably borrowed |
| } |
| ); |
| |
| struct HasInfo { |
| width: Option<usize> |
| } |
| |
| impl HasInfo { |
| fn get_size(&mut self, n: usize) -> usize { |
| n |
| } |
| |
| fn get_other(&mut self) -> usize { |
| let r = &mut *self; |
| r.get_size(width!(self)) |
| } |
| // Above is like `self.get_size(width!(self))`, but it |
| // deliberately avoids NLL's two phase borrow feature. |
| } |
| |
| fn main() { } |
