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

   1 // check-pass
   2
   3 #![warn(unused)]
   4
   5 macro_rules! m {
   6     ($a:tt $b:tt) => {
   7         $b $a; //~ WARN struct `S` is never constructed
   8     }
   9 }
  10
  11 fn main() {
  12     m!(S struct);
  13 }