Override `clone_from` for `{BinaryHeap, String}`

CC #28481

1 files changed, 12 insertions, 1 deletions

diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index bb65d7469ab..ba921fed68b 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -30,7 +30,7 @@ use vec::Vec;
 use boxed::Box;
 
 /// A growable string stored as a UTF-8 encoded buffer.
-#[derive(Clone, PartialOrd, Eq, Ord)]
+#[derive(PartialOrd, Eq, Ord)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct String {
     vec: Vec<u8>,
@@ -766,6 +766,17 @@ impl fmt::Display for FromUtf16Error {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
+impl Clone for String {
+    fn clone(&self) -> Self {
+        String { vec: self.vec.clone() }
+    }
+
+    fn clone_from(&mut self, source: &Self) {
+        self.vec.clone_from(&source.vec);
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
 impl FromIterator<char> for String {
     fn from_iter<I: IntoIterator<Item=char>>(iterable: I) -> String {
         let mut buf = String::new();