tests/ui/macros/macro-multiple-matcher-bindings.rs

   1 // Test that duplicate matcher binding names are caught at declaration time, rather than at macro
   2 // invocation time.
   3
   4 #![allow(unused_macros)]
   5
   6 macro_rules! foo1 {
   7     ($a:ident, $a:ident) => {}; //~ERROR duplicate matcher binding
   8     ($a:ident, $a:path) => {};  //~ERROR duplicate matcher binding
   9 }
  10
  11 macro_rules! foo2 {
  12     ($a:ident) => {}; // OK
  13     ($a:path) => {};  // OK
  14 }
  15
  16 macro_rules! foo3 {
  17     ($a:ident, $($a:ident),*) => {}; //~ERROR duplicate matcher binding
  18     ($($a:ident)+ # $($($a:path),+);*) => {}; //~ERROR duplicate matcher binding
  19 }
  20
  21 fn main() {}