diff options
Diffstat (limited to 'src/liballoc')
| -rw-r--r-- | src/liballoc/boxed.rs | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs index 8ad0c152dc8..a2cc98c7d01 100644 --- a/src/liballoc/boxed.rs +++ b/src/liballoc/boxed.rs @@ -125,8 +125,11 @@ impl<S: hash::Hasher, T: ?Sized + Hash<S>> Hash<S> for Box<T> { } /// Extension methods for an owning `Any` trait object. -#[unstable = "post-DST and coherence changes, this will not be a trait but \ - rather a direct `impl` on `Box<Any>`"] +#[unstable = "this trait will likely disappear once compiler bugs blocking \ + a direct impl on `Box<Any>` have been fixed "] +// FIXME(#18737): this should be a direct impl on `Box<Any>`. If you're +// removing this please make sure that you can downcase on +// `Box<Any + Send>` as well as `Box<Any>` pub trait BoxAny { /// Returns the boxed value if it is of type `T`, or /// `Err(Self)` if it isn't. @@ -134,10 +137,9 @@ pub trait BoxAny { fn downcast<T: 'static>(self) -> Result<Box<T>, Self>; } +#[stable] impl BoxAny for Box<Any> { #[inline] - #[unstable = "method may be renamed with respect to other downcasting \ - methods"] fn downcast<T: 'static>(self) -> Result<Box<T>, Box<Any>> { if self.is::<T>() { unsafe { |