3 #![stable(feature = "core", since = "1.6.0")]
4 #![feature(staged_api)]
5 #![feature(const_precise_live_drops)]
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 {