src/test/ui/repr/aligned_enum_cast.rs

   1 // run-pass
   2 // allows aligned custom discriminant enums to cast into other types
   3 // See the issue #92464 for more info
   4 #[allow(dead_code)]
   5 #[repr(align(8))]
   6 enum Aligned {
   7     Zero = 0,
   8     One = 1,
   9 }
  10
  11 fn main() {
  12     let aligned = Aligned::Zero;
  13     let fo = aligned as u8;
  14     println!("foo {}", fo);
  15     assert_eq!(fo, 0);
  16     println!("{}", tou8(Aligned::Zero));
  17     assert_eq!(tou8(Aligned::Zero), 0);
  18 }
  19
  20 #[inline(never)]
  21 fn tou8(al: Aligned) -> u8 {
  22     // Cast behind a function call so ConstProp does not see it
  23     // (so that we can test codegen).
  24     al as u8
  25 }