2021-02-09 Library Evolution Telecon

P2278R0: cbegin should always return a constant iterator

2021-02-09 Library Evolution Telecon Minutes

Chair: Nevin Liber

Champion: Barry Revzin

Minute Taker: Ben Craig

POLL: Do we want P2278R0 including adding .cbegin() and .cend() for span?

Attendance: 28

# of Authors: 1

Author Position: WF

Outcome: Consensus

SA: Don’t want .cbegin and .cend in span
WA: It is likely that the German National Body will still want the changes from P2276

Finland will disagree with those changes: does not want the range additions of .cbegin() and .cend()

POLL: Do we want P2278R0 excluding adding .cbegin() and .cend() for span?

Attendance: 28

# of Authors: 1

Author Position: WF

Outcome: Strong consensus (much stronger than the previous poll).

SA: It is likely that the German National Body will still want the changes from P2276

Summary

Strong consensus to move forward with this paper excluding adding .cbegin() and .cend() to span. The room considered the latter to be an orthogonal issue, which will require more motivation than was presented.

Note: P2276 was scheduled to be presented with this paper; however, due to a miscommunication the author was not present. P2276 will be given a chance to be presented.

Outcome

Strong consensus to move forward with the paper, excluding adding .cbegin() and .cend() to span. The paper will need a revision with wording, and won't move out of LEWG w/o giving P2276 a chance to be presented.

P2278R1 cbegin should always return a constant iterator (Barry Revzin)

An updated P2278R1 was seen by LEWG on 2021-11-09. (Full Minutes)

Polls

POLL: Modify “P2278R1 cbegin should always return a constant iterator” by changing the names to “all_const”, and adding const iterator alias, const reference alias, feature test macro, and then send the revised paper to LWG for C++23 with priority level 2 (to be confirmed with library evolution electronic poll).

Attendance: 27

# of Authors: 1

Author Position: SF

Outcome: Strong Consensus In Favor

Outcome

We considered the two solutions proposed at "P2276R0: Fix std::cbegin(), std::ranges::cbegin, and cbegin() for span" and "P2278R1: cbegin should always return a constant iterator", and accepted the second paper (more comprehensive, reviewed by implementer of ranges v3). P2278R1 was moved forward with strong consensus in favor.

Few fixes was requested:

• Add const_iterator_t and const_reference alias.
• Rename of as_const to all_const.
• Fix to 24.7.?.1 Overview [range.const.overview], 2.2.
• Add a feature test macro.

The paper was forwarded (after applying the fixes) to LWG for C++23, priority 2 (fix) (to be confirmed with LEWG electronic poll).

P2278R2 cbegin should always return a constant iterator (Barry Revzin)

2021-12 Library Evolution Electronic Poll Outcomes

POLL: Send [P2278R2] (cbegin Should Always Return A Constant Iterator) to Library Working Group for C++23, classified as an improvement of an existing feature ([P0592R4] bucket 2 item).

Consensus in favor, forwarded to LWG

P2278R3 cbegin should always return a constant iterator (Barry Revzin)

2022-05-31 Library Evolution Telecon

P2278R3: cbegin should always return a constant iterator

2022-05-31 Library Evolution Telecon Minutes

P2446R2: views::as_rvalue

2022-05-31 Library Evolution Telecon Minutes

Chair: Bryce Adelstein Lelbach

Minute Taker: Dietmar Kühl

Champion: Barry Revzin

Start: 2022-05-31 11:45 Eastern

Proposal is to call these adaptors as_const and as_rvalue (previously all_const and all_move).

We seem to be onboard with these names, we will start a mailing list motion to confirm the change.

End: 11:48

Summary

We discussed a solution to the naming of the adaptors previously known as all_const and all_move.
The suggested new names are as_const (which was its original name) and as_rvalue.

Library Evolution had broad support for these names.

Next Steps

• Start a mailing list motion to confirm renaming all_const to as_const (from P2278R3) and all_move to as_rvalue (from P2446R2).
• Assuming the mailing list motion is successful, take an electronic poll to confirm returning them to Library for C++23.

A Library Evolution mailing list motion was started on 2022-06-07 to approve the renaming of all_const to as_const (from P2278R3) and all_move to as_rvalue (from P2446R2). The motion passed.

P2278R4 cbegin should always return a constant iterator (Barry Revzin)

LWG reviewed and approved 2022-06-17 meeting

Notes: https://wiki.edg.com/bin/view/Wg21telecons2022/P2278-20220617

poll: put P2278r4 into C++23?

2022-07 Library Evolution Electronic Poll Outcomes

Poll 1.7: Send [P2278R4] cbegin Should Always Return A Constant Iterator to Library Working Group for C++23, classified as an addition ([P0592R4] bucket 3 item).

Outcome: Unanimous consensus in favor.