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Remove deprecated MaybeUninit slice methods #144111

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Merged
merged 1 commit into from
Jul 20, 2025
+2 −112
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Remove deprecated MaybeUninit slice methods #144111

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114 changes: 2 additions & 112 deletions library/core/src/mem/maybe_uninit.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1005,28 +1005,6 @@ impl<T> MaybeUninit<T> {
}
}

/// Deprecated version of [`slice::assume_init_ref`].
#[unstable(feature = "maybe_uninit_slice", issue = "63569")]
#[deprecated(
note = "replaced by inherent assume_init_ref method; will eventually be removed",
since = "1.83.0"
)]
pub const unsafe fn slice_assume_init_ref(slice: &[Self]) -> &[T] {
// SAFETY: Same for both methods.
unsafe { slice.assume_init_ref() }
}

/// Deprecated version of [`slice::assume_init_mut`].
#[unstable(feature = "maybe_uninit_slice", issue = "63569")]
#[deprecated(
note = "replaced by inherent assume_init_mut method; will eventually be removed",
since = "1.83.0"
)]
pub const unsafe fn slice_assume_init_mut(slice: &mut [Self]) -> &mut [T] {
// SAFETY: Same for both methods.
unsafe { slice.assume_init_mut() }
}

/// Gets a pointer to the first element of the array.
#[unstable(feature = "maybe_uninit_slice", issue = "63569")]
#[inline(always)]
Expand All @@ -1040,94 +1018,6 @@ impl<T> MaybeUninit<T> {
pub const fn slice_as_mut_ptr(this: &mut [MaybeUninit<T>]) -> *mut T {
this.as_mut_ptr() as *mut T
}

/// Deprecated version of [`slice::write_copy_of_slice`].
#[unstable(feature = "maybe_uninit_write_slice", issue = "79995")]
#[deprecated(
note = "replaced by inherent write_copy_of_slice method; will eventually be removed",
since = "1.83.0"
)]
pub fn copy_from_slice<'a>(this: &'a mut [MaybeUninit<T>], src: &[T]) -> &'a mut [T]
where
T: Copy,
{
this.write_copy_of_slice(src)
}

/// Deprecated version of [`slice::write_clone_of_slice`].
#[unstable(feature = "maybe_uninit_write_slice", issue = "79995")]
#[deprecated(
note = "replaced by inherent write_clone_of_slice method; will eventually be removed",
since = "1.83.0"
)]
pub fn clone_from_slice<'a>(this: &'a mut [MaybeUninit<T>], src: &[T]) -> &'a mut [T]
where
T: Clone,
{
this.write_clone_of_slice(src)
}

/// Deprecated version of [`slice::write_filled`].
#[unstable(feature = "maybe_uninit_fill", issue = "117428")]
#[deprecated(
note = "replaced by inherent write_filled method; will eventually be removed",
since = "1.83.0"
)]
pub fn fill<'a>(this: &'a mut [MaybeUninit<T>], value: T) -> &'a mut [T]
where
T: Clone,
{
this.write_filled(value)
}

/// Deprecated version of [`slice::write_with`].
#[unstable(feature = "maybe_uninit_fill", issue = "117428")]
#[deprecated(
note = "replaced by inherent write_with method; will eventually be removed",
since = "1.83.0"
)]
pub fn fill_with<'a, F>(this: &'a mut [MaybeUninit<T>], mut f: F) -> &'a mut [T]
where
F: FnMut() -> T,
{
this.write_with(|_| f())
}

/// Deprecated version of [`slice::write_iter`].
#[unstable(feature = "maybe_uninit_fill", issue = "117428")]
#[deprecated(
note = "replaced by inherent write_iter method; will eventually be removed",
since = "1.83.0"
)]
pub fn fill_from<'a, I>(
this: &'a mut [MaybeUninit<T>],
it: I,
) -> (&'a mut [T], &'a mut [MaybeUninit<T>])
where
I: IntoIterator<Item = T>,
{
this.write_iter(it)
}

/// Deprecated version of [`slice::as_bytes`].
#[unstable(feature = "maybe_uninit_as_bytes", issue = "93092")]
#[deprecated(
note = "replaced by inherent as_bytes method; will eventually be removed",
since = "1.83.0"
)]
pub fn slice_as_bytes(this: &[MaybeUninit<T>]) -> &[MaybeUninit<u8>] {
this.as_bytes()
}

/// Deprecated version of [`slice::as_bytes_mut`].
#[unstable(feature = "maybe_uninit_as_bytes", issue = "93092")]
#[deprecated(
note = "replaced by inherent as_bytes_mut method; will eventually be removed",
since = "1.83.0"
)]
pub fn slice_as_bytes_mut(this: &mut [MaybeUninit<T>]) -> &mut [MaybeUninit<u8>] {
this.as_bytes_mut()
}
}

impl<T> [MaybeUninit<T>] {
Expand Down Expand Up @@ -1304,7 +1194,7 @@ impl<T> [MaybeUninit<T>] {
/// Fills a slice with elements returned by calling a closure for each index.
///
/// This method uses a closure to create new values. If you'd rather `Clone` a given value, use
/// [`MaybeUninit::fill`]. If you want to use the `Default` trait to generate values, you can
/// [slice::write_filled]. If you want to use the `Default` trait to generate values, you can
/// pass [`|_| Default::default()`][Default::default] as the argument.
///
/// # Panics
Expand Down Expand Up @@ -1463,7 +1353,7 @@ impl<T> [MaybeUninit<T>] {
/// use std::mem::MaybeUninit;
///
/// let mut uninit = [MaybeUninit::<u16>::uninit(), MaybeUninit::<u16>::uninit()];
/// let uninit_bytes = MaybeUninit::slice_as_bytes_mut(&mut uninit);
/// let uninit_bytes = uninit.as_bytes_mut();
/// uninit_bytes.write_copy_of_slice(&[0x12, 0x34, 0x56, 0x78]);
/// let vals = unsafe { uninit.assume_init_ref() };
/// if cfg!(target_endian = "little") {
Expand Down
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