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Constify MaybeUninit::assume_init_read

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This commit is contained in:
Albin Hedman 2020-12-26 01:27:13 +01:00
parent d4fd7987b5
commit 1975a6e710
2 changed files with 3 additions and 1 deletions
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1
library/core/src/lib.rs
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@ -94,6 +94,7 @@
#![feature(const_precise_live_drops)]
#![feature(const_ptr_offset)]
#![feature(const_ptr_offset_from)]
#![feature(const_ptr_read)]
#![feature(const_raw_ptr_comparison)]
#![feature(const_raw_ptr_deref)]
#![feature(const_slice_from_raw_parts)]

3
library/core/src/mem/maybe_uninit.rs
View file

@ -575,8 +575,9 @@ impl<T> MaybeUninit<T> {
/// // they both get dropped!
/// ```
#[unstable(feature = "maybe_uninit_extra", issue = "63567")]
#[rustc_const_unstable(feature = "maybe_uninit_extra", issue = "63567")]
#[inline(always)]
pub unsafe fn assume_init_read(&self) -> T {
pub const unsafe fn assume_init_read(&self) -> T {
// SAFETY: the caller must guarantee that `self` is initialized.
// Reading from `self.as_ptr()` is safe since `self` should be initialized.
unsafe {