tests/ui/macros/macro-lifetime-used-with-labels.rs

   1 // run-pass
   2 #![allow(stable_features)]
   3 #![allow(unused_labels)]
   4 #![allow(unreachable_code)]
   5
   6 macro_rules! x {
   7     ($a:lifetime) => {
   8         $a: loop {
   9             break $a;
  10             panic!("failed");
  11         }
  12     }
  13 }
  14 macro_rules! br {
  15     ($a:lifetime) => {
  16         break $a;
  17     }
  18 }
  19 macro_rules! br2 {
  20     ($b:lifetime) => {
  21         'b: loop {
  22             break $b; // this $b should refer to the outer loop.
  23         }
  24     }
  25 }
  26 fn main() {
  27     x!('a);
  28     'c: loop {
  29         br!('c);
  30         panic!("failed");
  31     }
  32     'b: loop {
  33         br2!('b);
  34         panic!("failed");
  35     }
  36 }