| // 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. |
| |
| // Test of allowing two sequences repetitions in a row, |
| // functionality added as byproduct of RFC amendment #1384 |
| // https://github.com/rust-lang/rfcs/pull/1384 |
| |
| // Old version of Rust would reject this macro definition, even though |
| // there are no local ambiguities (the initial `banana` and `orange` |
| // tokens are enough for the expander to distinguish which case is |
| // intended). |
| macro_rules! foo { |
| ( $(banana $a:ident)* $(orange $b:tt)* ) => { }; |
| } |
| |
| fn main() { |
| foo!( banana id1 banana id2 |
| orange hi orange (hello world) ); |
| } |
