tests/ui/for-loop-while/label_break_value_invalid.rs

   1 #![crate_type = "lib"]
   2
   3 fn lbv_macro_test_hygiene_respected() {
   4     macro_rules! mac2 {
   5         ($val:expr) => {
   6             break 'a $val; //~ ERROR undeclared label `'a` [E0426]
   7         };
   8     }
   9     let x: u8 = 'a: {
  10         'b: {
  11             if true {
  12                 mac2!(2);
  13             }
  14         };
  15         0
  16     };
  17     assert_eq!(x, 2);
  18
  19     macro_rules! mac3 {
  20         ($val:expr) => {
  21             'a: {
  22                 $val
  23             }
  24         };
  25     }
  26     let x: u8 = mac3!('b: {
  27         if true {
  28             break 'a 3; //~ ERROR undeclared label `'a` [E0426]
  29         }
  30         0
  31     });
  32     assert_eq!(x, 3);
  33     let x: u8 = mac3!(break 'a 4); //~ ERROR undeclared label `'a` [E0426]
  34     assert_eq!(x, 4);
  35 }