update DispatchFromDyn doctest

2018-10-05 02:09:06 -04:00 · 2018-10-05 02:09:06 -04:00 · 48d7f8db3a
commit 48d7f8db3a
parent f12c250e40
1 changed files with 3 additions and 0 deletions
--- a/src/libcore/ops/unsize.rs
+++ b/src/libcore/ops/unsize.rs
@ -84,6 +84,9 @@ impl<T: ?Sized+Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {}
 /// example impl:
 ///
 /// ```
+/// # #![feature(dispatch_from_dyn, unsize)]
+/// # use std::{ops::DispatchFromDyn, marker::Unsize};
+/// # struct Rc<T: ?Sized>(::std::rc::Rc<T>);
 /// impl<T: ?Sized, U: ?Sized> DispatchFromDyn<Rc<U>> for Rc<T>
 /// where
 ///     T: Unsize<U>,