diff options
Diffstat (limited to 'src/liballoc')
| -rw-r--r-- | src/liballoc/btree/map.rs | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/liballoc/btree/map.rs b/src/liballoc/btree/map.rs index 28c42144b2a..9b6f91c039f 100644 --- a/src/liballoc/btree/map.rs +++ b/src/liballoc/btree/map.rs @@ -2369,6 +2369,11 @@ impl<'a, K: Ord, V> OccupiedEntry<'a, K, V> { /// Gets a mutable reference to the value in the entry. /// + /// If you need a reference to the `OccupiedEntry` which may outlive the + /// destruction of the `Entry` value, see [`into_mut`]. + /// + /// [`into_mut`]: #method.into_mut + /// /// # Examples /// /// ``` @@ -2380,9 +2385,13 @@ impl<'a, K: Ord, V> OccupiedEntry<'a, K, V> { /// /// assert_eq!(map["poneyland"], 12); /// if let Entry::Occupied(mut o) = map.entry("poneyland") { - /// *o.get_mut() += 10; + /// *o.get_mut() += 10; + /// assert_eq!(*o.get(), 22); + /// + /// // We can use the same Entry multiple times. + /// *o.get_mut() += 2; /// } - /// assert_eq!(map["poneyland"], 22); + /// assert_eq!(map["poneyland"], 24); /// ``` #[stable(feature = "rust1", since = "1.0.0")] pub fn get_mut(&mut self) -> &mut V { @@ -2391,6 +2400,10 @@ impl<'a, K: Ord, V> OccupiedEntry<'a, K, V> { /// Converts the entry into a mutable reference to its value. /// + /// If you need multiple references to the `OccupiedEntry`, see [`get_mut`]. + /// + /// [`get_mut`]: #method.get_mut + /// /// # Examples /// /// ``` |