Rollup merge of rust-lang#72876 - TrolledWoods:patch-2, r=Dylan-DPC

Mention that BTreeMap::new() doesn't allocate I think it would be nice to mention this, so you don't have to dig through the src to look at the definition of new().
Manishearth · Jun 23, 2020 · 317a151 · 317a151
2 parents 7d2fba1 + 0c5c644
commit 317a151
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/liballoc/collections/btree/map.rs b/src/liballoc/collections/btree/map.rs
@@ -490,6 +490,8 @@ struct MergeIter<K, V, I: Iterator<Item = (K, V)>> {
 impl<K: Ord, V> BTreeMap<K, V> {
     /// Makes a new empty BTreeMap with a reasonable choice for B.
     ///
+    /// Does not allocate anything on its own.
+    ///
     /// # Examples
     ///
     /// Basic usage: