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const stabilize NonNull::as_ref

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This commit is contained in:
Lukas Markeffsky 2022-09-23 17:52:31 +02:00
parent cda5becc27
commit 3e07965244
1 changed files with 3 additions and 2 deletions
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5
library/core/src/ptr/non_null.rs
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@ -367,13 +367,14 @@ impl<T: ?Sized> NonNull<T> {
///
/// [the module documentation]: crate::ptr#safety
#[stable(feature = "nonnull", since = "1.25.0")]
#[rustc_const_unstable(feature = "const_ptr_as_ref", issue = "91822")]
#[rustc_const_stable(feature = "const_nonnull_as_ref", since = "CURRENT_RUSTC_VERSION")]
#[must_use]
#[inline(always)]
pub const unsafe fn as_ref<'a>(&self) -> &'a T {
// SAFETY: the caller must guarantee that `self` meets all the
// requirements for a reference.
unsafe { &*self.as_ptr() }
// `cast_const` avoids a mutable raw pointer deref.
unsafe { &*self.as_ptr().cast_const() }
}
/// Returns a unique reference to the value. If the value may be uninitialized, [`as_uninit_mut`]