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stabilize core::array::{from_ref,from_mut}
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WaffleLapkin committed Apr 11, 2021
1 parent 010c236 commit 740b052
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Showing 2 changed files with 2 additions and 3 deletions.
4 changes: 2 additions & 2 deletions library/core/src/array/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -23,14 +23,14 @@ mod iter;
pub use iter::IntoIter;

/// Converts a reference to `T` into a reference to an array of length 1 (without copying).
#[unstable(feature = "array_from_ref", issue = "77101")]
#[stable(feature = "array_from_ref", since = "1.53.0")]
pub 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).
#[unstable(feature = "array_from_ref", issue = "77101")]
#[stable(feature = "array_from_ref", since = "1.53.0")]
pub 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]>() }
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1 change: 0 additions & 1 deletion library/core/tests/lib.rs
Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
#![feature(alloc_layout_extra)]
#![feature(array_chunks)]
#![feature(array_from_ref)]
#![feature(array_methods)]
#![feature(array_map)]
#![feature(array_windows)]
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