P2613 Add the missing `empty` to `mdspan`

[wg21bot]

P2613R0 Add the missing empty to mdspan (Yihe Le)

[brycelelbach]

2022-06-28 Library Evolution Telecon

P2613R0: Add the missing empty to mdspan

2022-06-28 Library Evolution Telecon Minutes

Chair: Bryce Adelstein Lelbach

Minute Taker: Ben Craig

Champion: Mark Hoemmen

Start: 2022-06-28 11:10 Eastern

Does this paper have:

• Field experience?
  • No, but Library wasn't worried about that.
• Wording?
  • Yes.
• Feature test macro?
  • Doesn't need one; hopefully it's going in at the same time as mdspan.

POLL: Send P2613R1 (Add the missing empty to mdspan) to Library for C++23 classified as B2 - Improvement, to be confirmed with a Library Evolution electronic poll.

Strongly Favor	Weakly Favor	Neutral	Weakly Against	Strongly Against
13	5	1	0	0

Attendance: 21

# of Authors: 0

Author Position: N/A

Outcome: Strong consensus in favor.

End: 11:16

Summary

We briefly discussed this proposal, which points out that mdspan doesn't have an empty member function. Library Evolution had consensus to add empty to mdspan.

Next Steps

Take an Library Evolution electronic poll to confirm sending P2613R1 (Add the missing empty to mdspan) to Library for C++23 classified as B2 - Improvement, to be confirmed with a Library Evolution electronic poll.__

[JeffGarland]

LWG reviewed and approved on 2022-07-08 Notes: https://wiki.edg.com/bin/view/Wg21telecons2022/P2613-20220708

poll: Put P2613r1 into C++23?

F	A	N
14	0	0

[wg21bot]

P2613R1 Add the missing empty to mdspan (Yihe Le)

[brycelelbach]

2022-07 Library Evolution Electronic Poll Outcomes

Poll 1.14: Send [P2613R1]: Add The Missing empty To mdspan to Library Working Group for C++23, classified as an improvement of an existing feature ([P0592R4] bucket 2 item).

Strongly Favor	Weakly Favor	Neutral	Weakly Against	Strongly Against
16	10	1	1	0

Outcome: Consensus in favor.

[tkoeppe]

This has been applied.