1 warning: struct is never constructed: `S`
2 --> $DIR/macro-span-replacement.rs:17:14
4 LL | $b $a; //~ WARN struct is never constructed
8 | ------------- in this macro invocation
10 note: lint level defined here
11 --> $DIR/macro-span-replacement.rs:13:9
15 = note: #[warn(dead_code)] implied by #[warn(unused)]