diff options
Diffstat (limited to 'library/core/src/array')
| -rw-r--r-- | library/core/src/array/mod.rs | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs index 73340fda2cb..811850af367 100644 --- a/library/core/src/array/mod.rs +++ b/library/core/src/array/mod.rs @@ -85,14 +85,16 @@ where /// Converts a reference to `T` into a reference to an array of length 1 (without copying). #[stable(feature = "array_from_ref", since = "1.53.0")] -pub fn from_ref<T>(s: &T) -> &[T; 1] { +#[rustc_const_unstable(feature = "const_array_from_ref", issue = "90206")] +pub const fn from_ref<T>(s: &T) -> &[T; 1] { // SAFETY: Converting `&T` to `&[T; 1]` is sound. unsafe { &*(s as *const T).cast::<[T; 1]>() } } /// Converts a mutable reference to `T` into a mutable reference to an array of length 1 (without copying). #[stable(feature = "array_from_ref", since = "1.53.0")] -pub fn from_mut<T>(s: &mut T) -> &mut [T; 1] { +#[rustc_const_unstable(feature = "const_array_from_ref", issue = "90206")] +pub const fn from_mut<T>(s: &mut T) -> &mut [T; 1] { // SAFETY: Converting `&mut T` to `&mut [T; 1]` is sound. unsafe { &mut *(s as *mut T).cast::<[T; 1]>() } } |