P2527 R3 std::variant_alternative_index and std::tuple_element_index

[wg21bot]

P2527R0 std::variant_alternative_index and std::variant_alternative_index_v (Alex Christensen)

[brycelelbach]

The current revision does not appear to have wording.

[achristensen07]

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

[achristensen07]

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

[brycelelbach]

@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.