Auto merge of #111278 - EFanZh:implement-from-array-refs-for-vec, r=dtolnay

Implement `From<{&,&mut} [T; N]>` for `Vec<T>` where `T: Clone`

Currently, if `T` implements `Clone`, we can create a `Vec<T>` from an `&[T]` or an `&mut [T]`, can we also support creating a `Vec<T>` from an `&[T; N]` or an `&mut [T; N]`? Also, do I need to add `#[inline]` to the implementation?

ACP: rust-lang/libs-team#220. [Accepted]

Closes #100880.

1 files changed, 10 insertions, 0 deletions

diff --git a/library/alloc/tests/vec.rs b/library/alloc/tests/vec.rs
index 9cb27899f10..d44dcfbf673 100644
--- a/library/alloc/tests/vec.rs
+++ b/library/alloc/tests/vec.rs
@@ -2562,3 +2562,13 @@ fn test_box_zero_allocator() {
     // Ensure all ZSTs have been freed.
     assert!(alloc.state.borrow().0.is_empty());
 }
+
+#[test]
+fn test_vec_from_array_ref() {
+    assert_eq!(Vec::from(&[1, 2, 3]), vec![1, 2, 3]);
+}
+
+#[test]
+fn test_vec_from_array_mut_ref() {
+    assert_eq!(Vec::from(&mut [1, 2, 3]), vec![1, 2, 3]);
+}