| // 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. |
| |
| #![feature(trace_macros)] |
| |
| fn main() { |
| trace_macros!(); //~ ERROR trace_macros! accepts only `true` or `false` |
| trace_macros!(1); //~ ERROR trace_macros! accepts only `true` or `false` |
| trace_macros!(ident); //~ ERROR trace_macros! accepts only `true` or `false` |
| trace_macros!(for); //~ ERROR trace_macros! accepts only `true` or `false` |
| trace_macros!(true,); //~ ERROR trace_macros! accepts only `true` or `false` |
| trace_macros!(false 1); //~ ERROR trace_macros! accepts only `true` or `false` |
| |
| |
| // should be fine: |
| macro_rules! expando { |
| ($x: ident) => { trace_macros!($x) } |
| } |
| |
| expando!(true); |
| } |