The current revision does not appear to have wording.

Planning to add wording to R1 if this gets positive feedback.

Also r0 incorrectly says it was published in 2021. It was published in 2022

@achristensen07 I'd add wording now if you can. We can probably fast track it if there's wording and implementation experience.

@inbal2l and @cor3ntin: If we don't have a revision with wording, the initial mailing list review should just be for feedback and sentiment - no motion to forward directly to Library Evolution.

Mailing list review 27-June - 13 July 2022

6 participants

A quick summary:
This feature seems useful as multiple people have expressed interest for it, however there is consensus that the author should,at least, explore more generic solutions, namely

• This facility should arguably work with tuple
• This facility looks like a mp_find in disguise, maybe we should explore that, up to and including restarting the conversation about the mp proposal
• EWG is working on better language support for pack, could and should we leverage that - and maybe P1858 (Generalized pack declaration) could show how it would help with this proposal
• Additionally, the paper should discuss whether the intended facility is intended to support inherited from variant types, as (some, but not all) variant handling functions do currently support that.

We want to see this paper on the mailing list again, with these questions discussed in the paper.

P2527R1 std::variant_alternative_index and std::tuple_element_index (Alex Christensen)

2022-11-09 13:00 to 15:00 UTC-10 Kona Library Evolution Meeting

2022-11-09 13:00 to 15:00 UTC-10 Kona Library Evolution Minutes

Champion: n/a (Fabio Fracassi presenting)

Chair: Fabio Fracassi

Summary

Short discussion

Next Steps

Paper author produces a revision with the help of a library wordsmith. The revised paper can then go to LWG.

2022-11 Library Evolution Electronic Poll Outcomes

Poll 2.5: Send [P2527R1] variant_alternative_index And variant_alternative_index_v to Library Working Group for C++26, classified as an improvement of an existing feature ([P0592R4] bucket 2 item).

Outcome: Consensus in favor.

P2527R2 std::variant_alternative_index and std::tuple_element_index (Alex Christensen)

P2527R3 std::variant_alternative_index and std::tuple_element_index (Alex Christensen)

LWG ended up skipping this paper in Tokyo -- will see it in St. Louis.