| // Copyright 2017 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! get_opt { |
| ($tgt:expr, $field:ident) => { |
| if $tgt.has_$field() {} |
| } |
| } |
| |
| fn main() { |
| get_opt!(bar, foo); |
| //~^ ERROR expected `{`, found `foo` |
| } |
