| // Copyright 2016 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(rustc_attrs)] |
| #![allow(warnings)] |
| |
| macro_rules! foo { () => { |
| let x = 1; |
| macro_rules! bar { () => {x} } |
| let _ = bar!(); |
| }} |
| |
| macro_rules! m { // test issue #31856 |
| ($n:ident) => ( |
| let a = 1; |
| let $n = a; |
| ) |
| } |
| |
| macro_rules! baz { |
| ($i:ident) => { |
| let mut $i = 2; |
| $i = $i + 1; |
| } |
| } |
| |
| #[rustc_error] |
| fn main() { //~ ERROR compilation successful |
| foo! {}; |
| bar! {}; |
| |
| let mut a = true; |
| baz!(a); |
| } |