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Showing content from https://github.com/rust-lang/rust/issues/133508 below:

Tracking Issue for `slice_as_array` · Issue #133508 · rust-lang/rust · GitHub

Feature gate: #![feature(slice_as_array)]

This is a tracking issue for adding conversion functions from slices to arrays.

impl<T> [T] {
    pub const fn as_array<const N: usize>(&self) -> Option<&[T; N]>;

    pub const fn as_mut_array<const N: usize>(&mut self) -> Option<&mut [T; N]>;
}

impl<T> *const [T] {
    pub const fn as_array<const N: usize>(self) -> Option<*const [T; N]>;
}

impl<T> *mut [T] {
    pub const fn as_mut_array<const N: usize>(self) -> Option<*mut [T; N]>;
}

// alloc::boxed

impl<T> Box<[T]> {
    pub fn into_array<const N: usize>(self) -> Result<Box<[T; N]>, Self>;
}

// alloc::rc

impl<T> Rc<[T]> {
    pub fn into_array<const N: usize>(self) -> Result<Rc<[T; N]>, Self>;
}

// alloc::sync

impl<T> Arc<[T]> {
    pub fn into_array<const N: usize>(self) -> Result<Arc<[T; N]>, Self>;
}

• API change proposal (ACP): #496
• Implementation for [T], *const [T], and *mut [T]: Add as_array and as_mut_array conversion methods to slices. #133512
• Fix docs for <[T]>::as_array: Fix docs for <[T]>::as_array. #133743
• Implementation for Box<[T]>, Rc<[T]>, and Arc<[T]>: Add into_array conversion destructors for Box, Rc, and Arc. #134379
• Reimplementation for using Result
• Final comment period (FCP)
• Stabilization PR

• const-compatible for the non-primitive types?
• Option or Result for the owning conversions?
• Implementations for Mutex and RwLock?
• Vec::into_boxed_array?
• str::as_bytes_array and String::into_boxed_bytes_array?

joseluis, YYMMYB, cxw620, MathiasPius, TheNullicorn and 2 more

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