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Constify mem::replace and ptr::replace

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This commit is contained in:
Albin Hedman 2021-03-13 20:38:43 +01:00
parent 64e2248794
commit 45988ee438
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2 changed files with 4 additions and 2 deletions
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library/core/src/ptr/mod.rs
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@ -584,7 +584,8 @@ const unsafe fn swap_nonoverlapping_bytes(x: *mut u8, y: *mut u8, len: usize) {
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
pub unsafe fn replace<T>(dst: *mut T, mut src: T) -> T {
#[rustc_const_unstable(feature = "const_replace", issue = "83164")]
pub const unsafe fn replace<T>(dst: *mut T, mut src: T) -> T {
// SAFETY: the caller must guarantee that `dst` is valid to be
// cast to a mutable reference (valid for writes, aligned, initialized),
// and cannot overlap `src` since `dst` must point to a distinct