| // Copyright 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. |
| |
| #![feature(macro_rules)] |
| |
| macro_rules! do_block{ |
| ($val:block) => {$val} |
| } |
| |
| fn main() { |
| let s; |
| do_block!({ s = "it works!"; }); |
| assert_eq!(s, "it works!"); |
| } |
