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Make from{,_mut}_ptr_range const

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- `from_ptr_range` uses `#![feature(slice_from_ptr_range_const)]`
- `from_mut_ptr_range` uses `#![feature(slice_from_mut_ptr_range_const)]`
This commit is contained in:
Maybe Waffle 2022-05-26 13:06:29 +04:00
parent 855fc022fe
commit 19caa8c89b
1 changed files with 4 additions and 2 deletions
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6
library/core/src/slice/raw.rs
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@ -213,7 +213,8 @@ pub const fn from_mut<T>(s: &mut T) -> &mut [T] {
///
/// [valid]: ptr#safety
#[unstable(feature = "slice_from_ptr_range", issue = "89792")]
pub unsafe fn from_ptr_range<'a, T>(range: Range<*const T>) -> &'a [T] {
#[rustc_const_unstable(feature = "slice_from_ptr_range_const", issue = "89792")]
pub const unsafe fn from_ptr_range<'a, T>(range: Range<*const T>) -> &'a [T] {
// SAFETY: the caller must uphold the safety contract for `from_ptr_range`.
unsafe { from_raw_parts(range.start, range.end.sub_ptr(range.start)) }
}
@ -263,7 +264,8 @@ pub unsafe fn from_ptr_range<'a, T>(range: Range<*const T>) -> &'a [T] {
///
/// [valid]: ptr#safety
#[unstable(feature = "slice_from_ptr_range", issue = "89792")]
pub unsafe fn from_mut_ptr_range<'a, T>(range: Range<*mut T>) -> &'a mut [T] {
#[rustc_const_unstable(feature = "slice_from_mut_ptr_range_const", issue = "89792")]
pub const unsafe fn from_mut_ptr_range<'a, T>(range: Range<*mut T>) -> &'a mut [T] {
// SAFETY: the caller must uphold the safety contract for `from_mut_ptr_range`.
unsafe { from_raw_parts_mut(range.start, range.end.sub_ptr(range.start)) }
}