src/test/ui/span/macro-span-replacement.stderr

   1 warning: struct `S` is never constructed
   2   --> $DIR/macro-span-replacement.rs:7:12
   3    |
   4 LL |         $b $a;
   5    |            ^^
   6 ...
   7 LL |     m!(S struct);
   8    |     ------------ in this macro invocation
   9    |
  10 note: the lint level is defined here
  11   --> $DIR/macro-span-replacement.rs:3:9
  12    |
  13 LL | #![warn(unused)]
  14    |         ^^^^^^
  15    = note: `#[warn(dead_code)]` implied by `#[warn(unused)]`
  16    = note: this warning originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
  17
  18 warning: 1 warning emitted
  19