X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Flibcollections%2Fbtree%2Fset.rs;h=e05533aa50e3cf0d7ee3bd955a213d8642bd0eb4;hb=535ee6c7f05e29a6e94edba06b228d64f8ba74ec;hp=9dbb61379379e9177145482ee3267c1c658c25db;hpb=8ae1d444cbd8515289818ee3e6c13bf30a7a227a;p=rust.git

diff --git a/src/libcollections/btree/set.rs b/src/libcollections/btree/set.rs
index 9dbb6137937..e05533aa50e 100644
--- a/src/libcollections/btree/set.rs
+++ b/src/libcollections/btree/set.rs
@@ -74,9 +74,10 @@ pub struct BTreeSet<T> {
     map: BTreeMap<T, ()>,
 }
 
-/// An iterator over a `BTreeSet`'s items.
+/// An iterator over the items of a `BTreeSet`.
 ///
-/// This structure is created by the [`iter`] method on [`BTreeSet`].
+/// This `struct` is created by the [`iter`] method on [`BTreeSet`].
+/// See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
 /// [`iter`]: struct.BTreeSet.html#method.iter
@@ -94,21 +95,23 @@ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
     }
 }
 
-/// An owning iterator over a `BTreeSet`'s items.
+/// An owning iterator over the items of a `BTreeSet`.
 ///
-/// This structure is created by the `into_iter` method on [`BTreeSet`]
-/// [`BTreeSet`] (provided by the `IntoIterator` trait).
+/// This `struct` is created by the [`into_iter`] method on [`BTreeSet`]
+/// (provided by the `IntoIterator` trait). See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
+/// [`into_iter`]: struct.BTreeSet.html#method.into_iter
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(Debug)]
 pub struct IntoIter<T> {
     iter: ::btree_map::IntoIter<T, ()>,
 }
 
-/// An iterator over a sub-range of `BTreeSet`'s items.
+/// An iterator over a sub-range of items in a `BTreeSet`.
 ///
-/// This structure is created by the [`range`] method on [`BTreeSet`].
+/// This `struct` is created by the [`range`] method on [`BTreeSet`].
+/// See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
 /// [`range`]: struct.BTreeSet.html#method.range
@@ -118,9 +121,10 @@ pub struct Range<'a, T: 'a> {
     iter: ::btree_map::Range<'a, T, ()>,
 }
 
-/// A lazy iterator producing elements in the set difference (in-order).
+/// A lazy iterator producing elements in the difference of `BTreeSet`s.
 ///
-/// This structure is created by the [`difference`] method on [`BTreeSet`].
+/// This `struct` is created by the [`difference`] method on [`BTreeSet`].
+/// See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
 /// [`difference`]: struct.BTreeSet.html#method.difference
@@ -134,15 +138,16 @@ pub struct Difference<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Difference<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Difference")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
 
-/// A lazy iterator producing elements in the set symmetric difference (in-order).
+/// A lazy iterator producing elements in the symmetric difference of `BTreeSet`s.
 ///
-/// This structure is created by the [`symmetric_difference`] method on
-/// [`BTreeSet`].
+/// This `struct` is created by the [`symmetric_difference`] method on
+/// [`BTreeSet`]. See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
 /// [`symmetric_difference`]: struct.BTreeSet.html#method.symmetric_difference
@@ -156,14 +161,16 @@ pub struct SymmetricDifference<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for SymmetricDifference<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("SymmetricDifference")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
 
-/// A lazy iterator producing elements in the set intersection (in-order).
+/// A lazy iterator producing elements in the intersection of `BTreeSet`s.
 ///
-/// This structure is created by the [`intersection`] method on [`BTreeSet`].
+/// This `struct` is created by the [`intersection`] method on [`BTreeSet`].
+/// See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
 /// [`intersection`]: struct.BTreeSet.html#method.intersection
@@ -177,14 +184,16 @@ pub struct Intersection<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Intersection<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Intersection")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
 
-/// A lazy iterator producing elements in the set union (in-order).
+/// A lazy iterator producing elements in the union of `BTreeSet`s.
 ///
-/// This structure is created by the [`union`] method on [`BTreeSet`].
+/// This `struct` is created by the [`union`] method on [`BTreeSet`].
+/// See its documentation for more.
 ///
 /// [`BTreeSet`]: struct.BTreeSet.html
 /// [`union`]: struct.BTreeSet.html#method.union
@@ -198,7 +207,8 @@ pub struct Union<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Union<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Union")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
@@ -728,7 +738,7 @@ impl<T> IntoIterator for BTreeSet<T> {
     type Item = T;
     type IntoIter = IntoIter<T>;
 
-    /// Gets an iterator for moving out the BtreeSet's contents.
+    /// Gets an iterator for moving out the `BTreeSet`'s contents.
     ///
     /// # Examples
     ///
@@ -935,11 +945,14 @@ fn len(&self) -> usize { self.iter.len() }
 #[unstable(feature = "fused", issue = "35602")]
 impl<T> FusedIterator for IntoIter<T> {}
 
+#[stable(feature = "btree_range", since = "1.17.0")]
 impl<'a, T> Clone for Range<'a, T> {
     fn clone(&self) -> Range<'a, T> {
         Range { iter: self.iter.clone() }
     }
 }
+
+#[stable(feature = "btree_range", since = "1.17.0")]
 impl<'a, T> Iterator for Range<'a, T> {
     type Item = &'a T;
 
@@ -947,6 +960,8 @@ fn next(&mut self) -> Option<&'a T> {
         self.iter.next().map(|(k, _)| k)
     }
 }
+
+#[stable(feature = "btree_range", since = "1.17.0")]
 impl<'a, T> DoubleEndedIterator for Range<'a, T> {
     fn next_back(&mut self) -> Option<&'a T> {
         self.iter.next_back().map(|(k, _)| k)