rollup merge of #20065: aturon/stab-2-cmp

This patch marks `PartialEq`, `Eq`, `PartialOrd`, and `Ord` as
`#[stable]`, as well as the majorify of manual implementaitons of these
traits. The traits match the [reform RFC](https://github.com/rust-lang/rfcs/pull/439).

In the future, many of the impls should be generalized; see #20063.
However, there is no problem stabilizing the less general impls, since
generalizing later is not a breaking change.

r? @alexcrichton

1 files changed, 4 insertions, 4 deletions

diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 214fae02ce2..75d4342083b 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -452,7 +452,7 @@ impl<T: Default> Default for Rc<T> {
     }
 }
 
-#[unstable = "PartialEq is unstable."]
+#[stable]
 impl<T: PartialEq> PartialEq for Rc<T> {
     /// Equality for two `Rc<T>`s.
     ///
@@ -487,10 +487,10 @@ impl<T: PartialEq> PartialEq for Rc<T> {
     fn ne(&self, other: &Rc<T>) -> bool { **self != **other }
 }
 
-#[unstable = "Eq is unstable."]
+#[stable]
 impl<T: Eq> Eq for Rc<T> {}
 
-#[unstable = "PartialOrd is unstable."]
+#[stable]
 impl<T: PartialOrd> PartialOrd for Rc<T> {
     /// Partial comparison for two `Rc<T>`s.
     ///
@@ -575,7 +575,7 @@ impl<T: PartialOrd> PartialOrd for Rc<T> {
     fn ge(&self, other: &Rc<T>) -> bool { **self >= **other }
 }
 
-#[unstable = "Ord is unstable."]
+#[stable]
 impl<T: Ord> Ord for Rc<T> {
     /// Comparison for two `Rc<T>`s.
     ///