src/test/ui/union/union-const-pat.rs

   1 union U {
   2     a: usize,
   3     b: usize,
   4 }
   5
   6 const C: U = U { a: 10 };
   7
   8 fn main() {
   9     match C {
  10         C => {} //~ ERROR cannot use unions in constant patterns
  11         _ => {}
  12     }
  13 }