| // 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. |
| |
| // Check that we do not ICE when compiling this |
| // macro, which reuses the expression `$id` |
| |
| |
| #![feature(box_patterns)] |
| #![feature(box_syntax)] |
| |
| struct Foo { |
| a: isize |
| } |
| |
| pub enum Bar { |
| Bar1, Bar2(isize, Box<Bar>), |
| } |
| |
| impl Foo { |
| fn elaborate_stm(&mut self, s: Box<Bar>) -> Box<Bar> { |
| macro_rules! declare { |
| ($id:expr, $rest:expr) => ({ |
| self.check_id($id); |
| box Bar::Bar2($id, $rest) |
| }) |
| } |
| match s { |
| box Bar::Bar2(id, rest) => declare!(id, self.elaborate_stm(rest)), |
| _ => panic!() |
| } |
| } |
| |
| fn check_id(&mut self, s: isize) { panic!() } |
| } |
| |
| pub fn main() { } |