| // Copyright 2012 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 behavior of `?` macro _separator_ under the 2015 edition. Namely, `?` can be used as a |
| // separator, but you get a migration warning for the edition. |
| |
| // compile-flags: --edition=2015 |
| // compile-pass |
| |
| #![warn(rust_2018_compatibility)] |
| |
| macro_rules! bar { |
| ($(a)?*) => {} //~WARN using `?` as a separator |
| //~^WARN this was previously accepted |
| } |
| |
| macro_rules! baz { |
| ($(a)?+) => {} //~WARN using `?` as a separator |
| //~^WARN this was previously accepted |
| } |
| |
| fn main() { |
| bar!(); |
| bar!(a); |
| bar!(a?a); |
| bar!(a?a?a?a?a); |
| |
| baz!(a); |
| baz!(a?a); |
| baz!(a?a?a?a?a); |
| } |