Tracking Issue for `const_array`

Feature gate: #![feature(const_array)]

This is a tracking issue for const [T]::map and array::from_fn.

Public API

// core::array
impl<T, const N: usize> [T; N] {
    pub const fn map<F, U>(self, f: F) -> [U; N]
    where
        F: [const] FnMut(T) -> U + [const] Destruct,
        U: [const] Destruct;
}

pub const fn from_fn<T: [const] Destruct, const N: usize, F>(f: F) -> [T; N]
where
    F: [const] FnMut(usize) -> T + [const] Destruct;

Steps / History

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

• Implementation: #147071
• Final comment period (FCP)^1
• Stabilization PR

Unresolved Questions

• Should array::try_map be constified

Start with the public API in core::array and review implementation PR #147071. Follow the feature lifecycle through the final comment period and stabilization PR, while resolving the open question about constifying array::try_map. Done means the tracking checklist reaches stabilization.