1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Test behavior of `?` macro _separator_ under the 2015 edition. Namely, `?` can be used as a
12 // separator, but you get a migration warning for the edition.
17 #![warn(rust_2018_compatibility)]
20 ($(a)?*) => {} //~WARN using `?` as a separator
21 //~^WARN this was previously accepted
25 ($(a)?+) => {} //~WARN using `?` as a separator
26 //~^WARN this was previously accepted