core: Stabilize FusedIterator

FusedIterator is a marker trait that promises that the implementing
iterator continues to return `None` from `.next()` once it has returned
`None` once (and/or `.next_back()`, if implemented).

The effects of FusedIterator are already widely available through
`.fuse()`, but with stable `FusedIterator`, stable Rust users can
implement this trait for their iterators when appropriate.

2 files changed, 15 insertions, 15 deletions

diff --git a/src/liballoc/btree/map.rs b/src/liballoc/btree/map.rs
index 618ef81fdd9..7b7a6374db9 100644
--- a/src/liballoc/btree/map.rs
+++ b/src/liballoc/btree/map.rs
@@ -1156,7 +1156,7 @@ impl<'a, K: 'a, V: 'a> Iterator for Iter<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for Iter<'a, K, V> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1235,7 +1235,7 @@ impl<'a, K: 'a, V: 'a> ExactSizeIterator for IterMut<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for IterMut<'a, K, V> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1365,7 +1365,7 @@ impl<K, V> ExactSizeIterator for IntoIter<K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<K, V> FusedIterator for IntoIter<K, V> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1395,7 +1395,7 @@ impl<'a, K, V> ExactSizeIterator for Keys<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for Keys<'a, K, V> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1432,7 +1432,7 @@ impl<'a, K, V> ExactSizeIterator for Values<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for Values<'a, K, V> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1482,7 +1482,7 @@ impl<'a, K, V> ExactSizeIterator for ValuesMut<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for ValuesMut<'a, K, V> {}
 
 
@@ -1561,7 +1561,7 @@ impl<'a, K, V> Range<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for Range<'a, K, V> {}
 
 #[stable(feature = "btree_range", since = "1.17.0")]
@@ -1630,7 +1630,7 @@ impl<'a, K, V> DoubleEndedIterator for RangeMut<'a, K, V> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, K, V> FusedIterator for RangeMut<'a, K, V> {}
 
 impl<'a, K, V> RangeMut<'a, K, V> {
diff --git a/src/liballoc/btree/set.rs b/src/liballoc/btree/set.rs
index 327eaaf4651..34cb7a08ed7 100644
--- a/src/liballoc/btree/set.rs
+++ b/src/liballoc/btree/set.rs
@@ -946,7 +946,7 @@ impl<'a, T> ExactSizeIterator for Iter<'a, T> {
     fn len(&self) -> usize { self.iter.len() }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for Iter<'a, T> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -971,7 +971,7 @@ impl<T> ExactSizeIterator for IntoIter<T> {
     fn len(&self) -> usize { self.iter.len() }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<T> FusedIterator for IntoIter<T> {}
 
 #[stable(feature = "btree_range", since = "1.17.0")]
@@ -997,7 +997,7 @@ impl<'a, T> DoubleEndedIterator for Range<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T> FusedIterator for Range<'a, T> {}
 
 /// Compare `x` and `y`, but return `short` if x is None and `long` if y is None
@@ -1044,7 +1044,7 @@ impl<'a, T: Ord> Iterator for Difference<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T: Ord> FusedIterator for Difference<'a, T> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1078,7 +1078,7 @@ impl<'a, T: Ord> Iterator for SymmetricDifference<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T: Ord> FusedIterator for SymmetricDifference<'a, T> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1116,7 +1116,7 @@ impl<'a, T: Ord> Iterator for Intersection<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T: Ord> FusedIterator for Intersection<'a, T> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1150,5 +1150,5 @@ impl<'a, T: Ord> Iterator for Union<'a, T> {
     }
 }
 
-#[unstable(feature = "fused", issue = "35602")]
+#[stable(feature = "fused", since = "1.25.0")]
 impl<'a, T: Ord> FusedIterator for Union<'a, T> {}