Closed
Description
Proposal
Problem statement
Allow using <[[T; N]]>::flatten
within const fn
.
Motivation, use-cases
Could be useful for code like this where you have an array containing arrays (for instance from u32::to_be_bytes
) to return an array. For example, Ipv6Addr::new
in standard library could make use of it.
[f(a), f(b), f(c), f(d)].flatten().try_into().unwrap()
Solution sketches
Add const
keyword. The current implementation is already const-compatible, and I don't see a reason why this would change.
Links and related work
What happens now?
This issue is part of the libs-api team API change proposal process. Once this issue is filed the libs-api team will review open proposals in its weekly meeting. You should receive feedback within a week or two.
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