P2863 R5 Review Annex D for C++26

[brycelelbach]

P2863R0 Review Annex D for C++26 (Alisdair Meredith)

[erichkeane]

This was discussed in EWG on Tuesday afternoon in Varna.

The following poll was taken:

EWG is interested in un-deprecating defining inline constexpr class variables (P2863R0 section 6.6).	SF	F	N	A	SA
2	12	7	3	0

Result: Consensus

A separate paper to do so is expected.

[wg21bot]

P2863R1 Review Annex D for C++26 (Alisdair Meredith)

[wg21bot]

P2863R2 Review Annex D for C++26 (Alisdair Meredith)

[cor3ntin]

Library Evolution Meeting Kona 2023-11-07

P2863R2: Review Annex D for C++26

2023-11-07 Library Evolution Kona Minutes

Champion: Alisdair Meredith.

Chair: Corentin Jabot

Minute Taker: Robert Leahy

Summary

We looked at the library components of this paper and a few items were of particular interest.

• We would like to see a paper to deprecate `rel_ops in the 26 time frame
• We would like to see the deprecation of path::u8pathexplored again (Last time was https://github.com/cplusplus/papers/issues/1415 ) - to this end, we recommend to bring P2863 to SG16 for guidance.
• The removal of move_iterator::operator-> (depr.move.iter.elem) is related to #604 , and as such we suggested the author should reach out to David Stone.

POLL: We would like to see a paper proposing to remove rel_ops

SF	F	N	A	SA
4	14	7	0	0

Attendance: 22 (in person) + 4 (remote) # of Authors: 1 Authors’ position: F Outcome: Strong Consensus in favor

Alisdair is encouraged to write this proposal

Next Steps

This paper does not need to go back to LEWG but we will look at papers addressing each of these individual items if they materialize.

[tahonermann]

We would like to see the deprecation of path::u8path explored again (Last time was https://github.com/cplusplus/papers/issues/1415 ) - to this end, we recommend to bring P2863 to SG16 for guidance.

SG16 has discussed the deprecation and removal of std::filesystem::u8path on several occasions.

During the SG16 2020-07-22 discussion of P2139R2 (Reviewing Deprecated Facilities of C++20 for C++23), a precursor to P2863, the following poll was taken:

• Poll: Does SG16 object to removal of the deprecated filesystem path factory functions in D.23 [depr.fs.path.factory]?

  • Attendees: 9

    Yes	No
    0	9

  • Consensus is no objection.

SG16 also discussed P2863 during its 2023-05-24 meeting, but since no polls were taken the prior consensus stands.

LEWG reconsidered deprecation via LWG3840 earlier this year; see the 2023-01-10 minutes. The following poll was taken then.

• POLL: Send the proposed resolution to LWG3840 (filesystem::u8path should be undeprecated) to Library for C++23 to be confirmed by a Library Evolution electronic poll.

  Strongly Favor	Weakly Favor	Neutral	Weakly Against	Strongly Against
  0	3	2	5	1

  • Attendance: 13
  • Number of Authors: 0
  • Author Position: N/A
  • Outcome: No consensus

[wg21bot]

P2863R3 Review Annex D for C++26 (Alisdair Meredith)

[wg21bot]

P2863R4 Review Annex D for C++26 (Alisdair Meredith)

[wg21bot]

P2863R5 Review Annex D for C++26 (Alisdair Meredith)