| // 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! piece( |
| ($piece:pat) => ($piece); |
| ); |
| |
| enum Piece {A, B} |
| |
| fn main() { |
| match Piece::A { |
| piece!(pt@ Piece::A) | piece!(pt@ Piece::B) => {} |
| } |
| } |
