diff options
| -rw-r--r-- | library/alloc/src/vec/cow.rs | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/library/alloc/src/vec/cow.rs b/library/alloc/src/vec/cow.rs index 2c799605b7b..b12910f3690 100644 --- a/library/alloc/src/vec/cow.rs +++ b/library/alloc/src/vec/cow.rs @@ -15,6 +15,19 @@ impl<'a, T: Clone> From<&'a [T]> for Cow<'a, [T]> { } } +#[stable(feature = "cow_from_array_ref", since = "CURRENT_RUSTC_VERSION")] +impl<'a, T: Clone, const N: usize> From<&'a [T; N]> for Cow<'a, [T]> { + /// Creates a [`Borrowed`] variant of [`Cow`] + /// from a reference to an array. + /// + /// This conversion does not allocate or clone the data. + /// + /// [`Borrowed`]: crate::borrow::Cow::Borrowed + fn from(s: &'a [T; N]) -> Cow<'a, [T]> { + Cow::Borrowed(s as &[_]) + } +} + #[stable(feature = "cow_from_vec", since = "1.8.0")] impl<'a, T: Clone> From<Vec<T>> for Cow<'a, [T]> { /// Creates an [`Owned`] variant of [`Cow`] |