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Make transpose const and inline

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Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>
This commit is contained in:
Alex Saveau 2022-10-16 14:53:51 -07:00
parent 8be3ce9056
commit 1a1ebb080f
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GPG key ID: 3F8D5B16EB169D48
2 changed files with 5 additions and 2 deletions
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1
library/core/src/lib.rs
View file

@ -217,6 +217,7 @@
#![feature(unboxed_closures)]
#![feature(unsized_fn_params)]
#![feature(asm_const)]
#![feature(const_transmute_copy)]
//
// Target features:
#![feature(arm_target_feature)]

6
library/core/src/mem/maybe_uninit.rs
View file

@ -1297,7 +1297,8 @@ impl<T, const N: usize> MaybeUninit<[T; N]> {
/// let data: [MaybeUninit<u8>; 1000] = MaybeUninit::uninit().transpose();
/// ```
#[unstable(feature = "maybe_uninit_uninit_array_transpose", issue = "96097")]
pub fn transpose(self) -> [MaybeUninit<T>; N] {
#[inline]
pub const fn transpose(self) -> [MaybeUninit<T>; N] {
// SAFETY: T and MaybeUninit<T> have the same layout
unsafe { super::transmute_copy(&ManuallyDrop::new(self)) }
}
@ -1316,7 +1317,8 @@ impl<T, const N: usize> [MaybeUninit<T>; N] {
/// let data: MaybeUninit<[u8; 1000]> = data.transpose();
/// ```
#[unstable(feature = "maybe_uninit_uninit_array_transpose", issue = "96097")]
pub fn transpose(self) -> MaybeUninit<[T; N]> {
#[inline]
pub const fn transpose(self) -> MaybeUninit<[T; N]> {
// SAFETY: T and MaybeUninit<T> have the same layout
unsafe { super::transmute_copy(&ManuallyDrop::new(self)) }
}