| // 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 { |
| () => { |
| struct Bar; |
| struct Baz; |
| } |
| } |
| |
| macro_rules! grault { |
| () => {{ |
| foo!(); |
| struct Xyzzy; |
| 0 |
| }} |
| } |
| |
| fn main() { |
| let x = grault!(); |
| assert_eq!(x, 0); |
| } |