Override Box::<[T]>::clone_from

mendess · mendess · commit a5734ca41748 · 2020-05-23T14:08:53.000+01:00
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
@@ -1090,6 +1090,14 @@ impl<T: Clone> Clone for Box<[T]> {
     fn clone(&self) -> Self {
         self.to_vec().into_boxed_slice()
     }
+
+    fn clone_from(&mut self, other: &Self) {
+        if self.len() == other.len() {
+            self.clone_from_slice(&other);
+        } else {
+            *self = other.clone();
+        }
+    }
 }
 
 #[stable(feature = "box_borrow", since = "1.1.0")]

Original file line number	Diff line number	Diff line change
`@@ -1090,6 +1090,14 @@ impl<T: Clone> Clone for Box<[T]> {`
`1090`	`1090`	`fn clone(&self) -> Self {`
`1091`	`1091`	`self.to_vec().into_boxed_slice()`
`1092`	`1092`	`}`
	`1093`	`+`
	`1094`	`+ fn clone_from(&mut self, other: &Self) {`
	`1095`	`+ if self.len() == other.len() {`
	`1096`	`+ self.clone_from_slice(&other);`
	`1097`	`+ } else {`
	`1098`	`+ *self = other.clone();`
	`1099`	`+ }`
	`1100`	`+ }`
`1093`	`1101`	`}`
`1094`	`1102`
`1095`	`1103`	`#[stable(feature = "box_borrow", since = "1.1.0")]`