src/test/ui/consts/unstable-precise-live-drops-in-libcore.rs

   1 // check-pass
   2
   3 #![stable(feature = "core", since = "1.6.0")]
   4 #![feature(staged_api)]
   5 #![feature(const_precise_live_drops)]
   6
   7 enum Either<T, S> {
   8     Left(T),
   9     Right(S),
  10 }
  11
  12 impl<T> Either<T, T> {
  13     #[stable(feature = "rust1", since = "1.0.0")]
  14     #[rustc_const_unstable(feature = "foo", issue = "none")]
  15     pub const fn unwrap(self) -> T {
  16         match self {
  17             Self::Left(t) => t,
  18             Self::Right(t) => t,
  19         }
  20     }
  21 }
  22
  23 fn main() {}