35 lines
870 B
Rust
35 lines
870 B
Rust
|
// 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.
|
||
|
|
|
||
|
|
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 {
|
||
|
|
self.get_size(width!(self))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
println!("hello?");
|
||
|
|
}
|