1 warning: using `?` as a separator is deprecated and will be a hard error in an upcoming edition
2 --> $DIR/macro-at-most-once-rep-2015-ques-sep.rs:20:10
4 LL | ($(a)?*) => {} //~WARN using `?` as a separator
7 note: lint level defined here
8 --> $DIR/macro-at-most-once-rep-2015-ques-sep.rs:17:9
10 LL | #![warn(rust_2018_compatibility)]
11 | ^^^^^^^^^^^^^^^^^^^^^^^
12 = note: #[warn(question_mark_macro_sep)] implied by #[warn(rust_2018_compatibility)]
13 = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
14 = note: for more information, see issue #48075 <https://github.com/rust-lang/rust/issues/48075>
16 warning: using `?` as a separator is deprecated and will be a hard error in an upcoming edition
17 --> $DIR/macro-at-most-once-rep-2015-ques-sep.rs:25:10
19 LL | ($(a)?+) => {} //~WARN using `?` as a separator
22 = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
23 = note: for more information, see issue #48075 <https://github.com/rust-lang/rust/issues/48075>