Feature gate: #![feature(slice_shift)]

This is a tracking issue for the [T]::shift_left and [T]::shift_right methods, which are the safe versions of memmove.

Public API

// in core
impl<T> [T] {
    pub fn shift_left<const N: usize>(&mut self, inserted: [T; N]) -> [T; N];
    pub fn shift_right<const N: usize>(&mut self, inserted: [T; N]) -> [T; N];
}

Steps / History

(Remember to update the S-tracking-* label when checking boxes.)

• ACP: Add [_]::shift_{left,right} libs-team#717
• Implementation: Add shift_{left,right} on slices #151812
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• "Our conclusion from the meeting was: if it's possible to do this without appreciable runtime performance impact, we'd love to avoid a panic. If doing this would add runtime performance impact, we're happy to ship the panicking version." ~ Add [_]::shift_{left,right} libs-team#717 (comment)