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library: Stabilize const_replace

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Depends on stabilizing `const_ptr_write`.

Const-stabilizes:
- `core::mem::replace`
- `core::ptr::replace`
This commit is contained in:
Jubilee Young 2024-09-26 11:49:53 -07:00
parent ddc367ded7
commit 187c8b0ce9
3 changed files with 4 additions and 3 deletions
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1
library/core/src/lib.rs
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@ -138,7 +138,6 @@
#![feature(const_ptr_is_null)] #![feature(const_ptr_is_null)]
#![feature(const_ptr_sub_ptr)] #![feature(const_ptr_sub_ptr)]
#![feature(const_raw_ptr_comparison)] #![feature(const_raw_ptr_comparison)]
#![feature(const_replace)]
#![feature(const_size_of_val)] #![feature(const_size_of_val)]
#![feature(const_size_of_val_raw)] #![feature(const_size_of_val_raw)]
#![feature(const_strict_overflow_ops)] #![feature(const_strict_overflow_ops)]

3
library/core/src/mem/mod.rs
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@ -857,7 +857,8 @@ pub fn take<T: Default>(dest: &mut T) -> T {
#[inline] #[inline]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
#[must_use = "if you don't need the old value, you can just assign the new value directly"] #[must_use = "if you don't need the old value, you can just assign the new value directly"]
#[rustc_const_unstable(feature = "const_replace", issue = "83164")] #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
#[rustc_const_stable(feature = "const_replace", since = "CURRENT_RUSTC_VERSION")]
#[cfg_attr(not(test), rustc_diagnostic_item = "mem_replace")] #[cfg_attr(not(test), rustc_diagnostic_item = "mem_replace")]
pub const fn replace<T>(dest: &mut T, src: T) -> T { pub const fn replace<T>(dest: &mut T, src: T) -> T {
// It may be tempting to use `swap` to avoid `unsafe` here. Don't! // It may be tempting to use `swap` to avoid `unsafe` here. Don't!

3
library/core/src/ptr/mod.rs
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@ -1263,7 +1263,8 @@ macro_rules! attempt_swap_as_chunks {
/// ``` /// ```
#[inline] #[inline]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_replace", issue = "83164")] #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
#[rustc_const_stable(feature = "const_replace", since = "CURRENT_RUSTC_VERSION")]
#[rustc_diagnostic_item = "ptr_replace"] #[rustc_diagnostic_item = "ptr_replace"]
pub const unsafe fn replace<T>(dst: *mut T, src: T) -> T { pub const unsafe fn replace<T>(dst: *mut T, src: T) -> T {
// SAFETY: the caller must guarantee that `dst` is valid to be // SAFETY: the caller must guarantee that `dst` is valid to be