diff options
Diffstat (limited to 'src/liballoc/sync.rs')
| -rw-r--r-- | src/liballoc/sync.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/liballoc/sync.rs b/src/liballoc/sync.rs index bcf5212f1ff..d388f76d8e8 100644 --- a/src/liballoc/sync.rs +++ b/src/liballoc/sync.rs @@ -25,7 +25,7 @@ use core::cmp::Ordering; use core::intrinsics::abort; use core::mem::{self, align_of_val, size_of_val}; use core::ops::Deref; -use core::ops::CoerceUnsized; +use core::ops::{CoerceUnsized, DispatchFromDyn}; use core::pin::Pin; use core::ptr::{self, NonNull}; use core::marker::{Unpin, Unsize, PhantomData}; @@ -214,6 +214,9 @@ unsafe impl<T: ?Sized + Sync + Send> Sync for Arc<T> {} #[unstable(feature = "coerce_unsized", issue = "27732")] impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Arc<U>> for Arc<T> {} +#[unstable(feature = "dispatch_from_dyn", issue = "0")] +impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Arc<U>> for Arc<T> {} + /// `Weak` is a version of [`Arc`] that holds a non-owning reference to the /// managed value. The value is accessed by calling [`upgrade`] on the `Weak` /// pointer, which returns an [`Option`]`<`[`Arc`]`<T>>`. @@ -254,6 +257,8 @@ unsafe impl<T: ?Sized + Sync + Send> Sync for Weak<T> {} #[unstable(feature = "coerce_unsized", issue = "27732")] impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Weak<U>> for Weak<T> {} +#[unstable(feature = "dispatch_from_dyn", issue = "0")] +impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Weak<U>> for Weak<T> {} #[stable(feature = "arc_weak", since = "1.4.0")] impl<T: ?Sized + fmt::Debug> fmt::Debug for Weak<T> { |