diff options
Diffstat (limited to 'rust/kernel/slice.rs')
| -rw-r--r-- | rust/kernel/slice.rs | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/rust/kernel/slice.rs b/rust/kernel/slice.rs deleted file mode 100644 index ca2cde135061..000000000000 --- a/rust/kernel/slice.rs +++ /dev/null @@ -1,49 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -//! Additional (and temporary) slice helpers. - -/// Extension trait providing a portable version of [`as_flattened`] and -/// [`as_flattened_mut`]. -/// -/// In Rust 1.80, the previously unstable `slice::flatten` family of methods -/// have been stabilized and renamed from `flatten` to `as_flattened`. -/// -/// This creates an issue for as long as the MSRV is < 1.80, as the same functionality is provided -/// by different methods depending on the compiler version. -/// -/// This extension trait solves this by abstracting `as_flatten` and calling the correct method -/// depending on the Rust version. -/// -/// This trait can be removed once the MSRV passes 1.80. -/// -/// [`as_flattened`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_flattened -/// [`as_flattened_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_flattened_mut -#[cfg(not(CONFIG_RUSTC_HAS_SLICE_AS_FLATTENED))] -pub trait AsFlattened<T> { - /// Takes a `&[[T; N]]` and flattens it to a `&[T]`. - /// - /// This is an portable layer on top of [`as_flattened`]; see its documentation for details. - /// - /// [`as_flattened`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_flattened - fn as_flattened(&self) -> &[T]; - - /// Takes a `&mut [[T; N]]` and flattens it to a `&mut [T]`. - /// - /// This is an portable layer on top of [`as_flattened_mut`]; see its documentation for details. - /// - /// [`as_flattened_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_flattened_mut - fn as_flattened_mut(&mut self) -> &mut [T]; -} - -#[cfg(not(CONFIG_RUSTC_HAS_SLICE_AS_FLATTENED))] -impl<T, const N: usize> AsFlattened<T> for [[T; N]] { - #[allow(clippy::incompatible_msrv)] - fn as_flattened(&self) -> &[T] { - self.flatten() - } - - #[allow(clippy::incompatible_msrv)] - fn as_flattened_mut(&mut self) -> &mut [T] { - self.flatten_mut() - } -} |
