Rollup merge of #68692 - jyn514:vec-from-array, r=LukasKalbertodt

impl From<[T; N]> for Vec<T>

Closes https://github.com/rust-lang/rust/issues/67963

1 files changed, 16 insertions, 0 deletions

diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
index 4769091183a..e171edef736 100644
--- a/src/liballoc/vec.rs
+++ b/src/liballoc/vec.rs
@@ -1,3 +1,4 @@
+// ignore-tidy-filelength
 //! A contiguous growable array type with heap-allocated contents, written
 //! `Vec<T>`.
 //!
@@ -2398,6 +2399,21 @@ impl<T: Clone> From<&mut [T]> for Vec<T> {
     }
 }
 
+#[stable(feature = "vec_from_array", since = "1.44.0")]
+impl<T, const N: usize> From<[T; N]> for Vec<T>
+where
+    [T; N]: LengthAtMost32,
+{
+    #[cfg(not(test))]
+    fn from(s: [T; N]) -> Vec<T> {
+        <[T]>::into_vec(box s)
+    }
+    #[cfg(test)]
+    fn from(s: [T; N]) -> Vec<T> {
+        crate::slice::into_vec(box s)
+    }
+}
+
 #[stable(feature = "vec_from_cow_slice", since = "1.14.0")]
 impl<'a, T> From<Cow<'a, [T]>> for Vec<T>
 where