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Fix &mut invalidation in ptr::swap doctest #95617

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Apr 3, 2022
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Fix &mut invalidation in ptr::swap doctest #95617

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5 changes: 3 additions & 2 deletions library/core/src/ptr/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -637,8 +637,9 @@ pub const fn slice_from_raw_parts_mut<T>(data: *mut T, len: usize) -> *mut [T] {
///
/// let mut array = [0, 1, 2, 3];
///
/// let x = array[0..].as_mut_ptr() as *mut [u32; 2]; // this is `array[0..2]`
/// let y = array[2..].as_mut_ptr() as *mut [u32; 2]; // this is `array[2..4]`
/// let (x, y) = array.split_at_mut(2);
/// let x = x.as_mut_ptr().cast::<[u32; 2]>(); // this is `array[0..2]`
/// let y = y.as_mut_ptr().cast::<[u32; 2]>(); // this is `array[2..4]`
///
/// unsafe {
/// ptr::swap(x, y);
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