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Mark slice::swap_with_slice unstably const #142205

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Mark slice::swap_with_slice unstably const #142205

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3 changes: 2 additions & 1 deletion library/core/src/slice/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3927,8 +3927,9 @@ impl<T> [T] {
///
/// [`split_at_mut`]: slice::split_at_mut
#[stable(feature = "swap_with_slice", since = "1.27.0")]
#[rustc_const_unstable(feature = "const_swap_with_slice", issue = "142204")]
#[track_caller]
pub fn swap_with_slice(&mut self, other: &mut [T]) {
pub const fn swap_with_slice(&mut self, other: &mut [T]) {
assert!(self.len() == other.len(), "destination and source slices have different lengths");
// SAFETY: `self` is valid for `self.len()` elements by definition, and `src` was
// checked to have the same length. The slices cannot overlap because
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