src/test/ui/parser/macro/issue-33569.rs

   1 macro_rules! foo {
   2     { $+ } => { //~ ERROR expected identifier, found `+`
   3                 //~^ ERROR missing fragment specifier
   4         $(x)(y) //~ ERROR expected one of: `*`, `+`, or `?`
   5     }
   6 }
   7
   8 foo!();
   9
  10 fn main() {}