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Add rustc_allow_const_fn_unstable annotations to pre-existing Layout methods

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This commit is contained in:
Scott McMurray 2022-09-21 13:43:21 -07:00
parent 585bcc6980
commit e2d7cdcf2b
3 changed files with 7 additions and 1 deletions
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4
library/core/src/ptr/alignment.rs
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@ -24,7 +24,7 @@ impl Alignment {
/// but in an `Alignment` instead of a `usize.
#[unstable(feature = "ptr_alignment_type", issue = "102070")]
#[inline]
pub(crate) fn of<T>() -> Self {
pub const fn of<T>() -> Self {
// SAFETY: rustc ensures that type alignment is always a power of two.
unsafe { Alignment::new_unchecked(mem::align_of::<T>()) }
}
@ -53,6 +53,7 @@ impl Alignment {
/// Equivalently, it must be `1 << exp` for some `exp` in `0..usize::BITS`.
/// It must *not* be zero.
#[unstable(feature = "ptr_alignment_type", issue = "102070")]
#[rustc_const_unstable(feature = "ptr_alignment_type", issue = "102070")]
#[inline]
pub const unsafe fn new_unchecked(align: usize) -> Self {
// SAFETY: Precondition passed to the caller.
@ -65,6 +66,7 @@ impl Alignment {
/// Returns the alignment as a [`NonZeroUsize`]
#[unstable(feature = "ptr_alignment_type", issue = "102070")]
#[rustc_const_unstable(feature = "ptr_alignment_type", issue = "102070")]
#[inline]
pub const fn as_usize(self) -> usize {
self.0 as usize