mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 17:24:06 +00:00
23 lines
634 B
Rust
23 lines
634 B
Rust
|
// 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.
|
||
|
|
|
||
|
|
macro_rules! foo {
|
||
|
|
($y:expr) => ({
|
||
|
|
$y = 2;
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
#[allow(unused_variables)]
|
||
|
|
#[allow(unused_assignments)]
|
||
|
|
fn main() {
|
||
|
|
let mut x = 1;
|
||
|
|
foo!(x);
|
||
|
|
}
|