Tracking Issue for const MaybeUninit::as(_mut)_ptr (feature: const_maybe_uninit_as_ptr)

[RalfJung]

This is a tracking issue for const MaybeUninit::as(_mut)_ptr.
The feature gate for the issue is #![feature(const_maybe_uninit_as_ptr)].

About tracking issues

Tracking issues are used to record the overall progress of implementation.
They are also uses as hubs connecting to other relevant issues, e.g., bugs or open design questions.
A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature.
Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.

Steps

• Implement
• Adjust documentation (see instructions on rustc-dev-guide)
• Stabilization PR (see instructions on rustc-dev-guide)
  • Stabilize some MaybeUninit behavior as const #90896
  • Stabilize const MaybeUninit::as_mut_ptr #130542

Unresolved Questions

Implementation history

• Added in make MaybeUninit::as_(mut_)ptr const #75250

[jhpratt]

There doesn't appear to be any blockers for the non-mut version, unless I'm missing something?

[pnkfelix]

Visiting for T-compiler backlog bonanza. This seems likely to be ready to stabilize, but since I'm not certain, I'm tagging with "needs summary"

Also, we think the question of whether to stabilize these methods falls under T-libs domain, so tagging with that team label

@rustbot label: +T-libs +S-tracking-needs-summary

[pnkfelix]

(@m-ou-se pointed out that this is a libs-api team issue, not a libs implementation issue.)

[m-ou-se]

@rfcbot merge

[rfcbot]

Team member @m-ou-se has proposed to merge this. The next step is review by the rest of the tagged team members:

• @Amanieu
• @BurntSushi
• @dtolnay
• @joshtriplett
• @m-ou-se
• @yaahc

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.