src/test/ui/macros/macro-lifetime.rs

   1 // run-pass
   2 macro_rules! foo {
   3     ($l:lifetime) => {
   4         fn f<$l>(arg: &$l str) -> &$l str {
   5             arg
   6         }
   7     }
   8 }
   9
  10 pub fn main() {
  11     foo!('a);
  12     let x: &'static str = f("hi");
  13     assert_eq!("hi", x);
  14 }