Kona 2019-02 LEWGI Minutes

P0447R6 std::colony

Champion: Jonathan Wakely and Nico Josuttis

Minute Taker: Vincent Reverdy

Start Overview: 15:22

Start Discussion: 15:59

We need a list of the things in the wild like this (prior art).

Eric F will write an implementation before Cologne.

Jonathan Wakely is thinking about putting it into GCC as an extension.

Please come back with something more wording like - we need a class synopsis.

Start Polling: 16:09

POLL: We should promise more committee time to pursuing std::colony, knowing that our time is scarce and this will leave less time for other work.

Attendance: 16

End: 4:15

Author has deferred discussion until Belfast; he hopes to have more usage experience by then.

P0447R8 Introduction of std::colony to the standard library (Matt Bentley)

P0447R9 Introduction of std::colony to the standard library (Matt Bentley)

P0447R10 Introduction of std::colony to the standard library (Matt Bentley)

P0447R11 Introduction of std::colony to the standard library (Matt Bentley)

2023-11-07 Library Evolution Meeting Kona 2023 (First Afternoon Session)

P0447R24: Introduction of std::hive to the standard library

2023-11-07 Library Evolution Kona Minutes (first afternoon session)

Champion: Matthew Bentley

Chair: Inbal Levi / Nevin Liber

Minute Taker: Mark Zeren

Start: 2023-11-07, First Afternoon Session

Summary

We took a poll on continue working on std::hive:

POLL: We would like to devote more LEWG time to P0443 knowing that our time is scarce and this will leave less time for other work.:

Attendance: 28+9

# of Authors: 1

Authors’ position: SF

Outcome: consensus to continue

Next Steps

We had a discussion on the addition of "hive" into the standard library.
We had a consensus in favor at 2:1 ratio.

2023-11-07 Library Evolution Meeting Kona 2023 (Second Afternoon Session)

P0447R24: Introduction of std::hive to the standard library

2023-11-07 Library Evolution Kona Minutes (second afternoon session)

Champion: Matthew Bentley

Chair: Ben Craig / Robert Leahy

Minute Taker: Robert Leahy

Start: 2023-11-07

Summary

POLL: Remove relational operators for hive iterators. Due to ABI, we likely could not add them later

Attendance: 19+5

# of Authors: 1

Author Position: WA

Outcome: No consensus for change

1 abstention

POLL: Support negative std::distance, std::ranges::distance, std::reverse_iterator, std::move_iterator and friends, but not for user supplied adaptors, for hive iterators

Attendance: 19+5

Outcome: Ask for unanimous vote. No objection to unanimous dissent. No one wants this

Next Steps

Change swap specification so that it swaps the size limits
Decide if splice needs to mention that it invalidates end iterators
Add constexpr to block_capacity_limits()?
Work on the exception guarantees of reshape. Strongly consider sticking with the basic exception guarantee.

Next meeting, start at reshape, and cover revisions, but do not start over from the beginning of the wording

2023-11-10 Library Evolution Meeting Kona 2023

D0447R25: Introduction of std::hive to the standard library

2023-11-10 Library Evolution Kona Minutes

Champion: Matthew Bentley

Chair: Ben Craig / Inbal Levi

Minute Taker: Eddie Nolan

Summary

POLL: Remove is_active from std::hive

Attendance: 21+

# of Authors: 1

Author Position: SA

Outcome: Consensus for change

POLL: Add precondition to get_iterator, requiring the pointee to belong to the current hive, which would remove the sentence about returning past-the-end iterator if the item is not found

Attendance: 21+

# of Authors: 1

Author Position: WF

Outcome: Consensus

POLL: Remove get_iterator from std::hive

Attendance: 22+

# of Authors: 1

Author Position: SA

Outcome: No consensus

POLL: Modify D0447R25 (Introduction of std::hive to the standard library) by removing is_active and adding a precondition to get_iterator as described above, and then send the revised paper to LWG for C++26, to be confirmed with a Library Evolution electronic poll.

Attendance: 26+9

# of Authors: 1

Author Position: SF

Outcome: Consensus

Next Steps

Produce a revision with the requested changes. That revision will go in LEWG electronic polling.

P0447R26 was added to LEWG 2023 December electronic poll paper (P30532R0)
(Note: Please make sure to publish it in the Dec 2023 mailing list. Please make sure you also publish P0447R25, which is the revision which we provided feedback on in the discussion above)

P0447R26 was added to LEWG 2023 December electronic poll paper (P30532R0) (Note: Please make sure to publish it in the Dec 2023 mailing list. Please make sure you also publish P0447R25, which is the revision which we provided feedback on in the discussion above)

Hi Inbal,
the version we discussed was the draft version, D0447R25 as noted above, so the new published version will be P0447R25. Please adjust the poll accordingly (I can alter the numbering if there's some problem with doing so).
I will have it ready for the december mailing 👍
Cheers,
Matt

@mattreecebentley - I would prefer having D0447R25 (which was seen on Friday) published as is (as it is what the polls address) and then in the same mailing list, have P0447R26 which applies the changes requested by the Friday polls. In this way, we can keep track of what was requested and when. :) Will that be OK with you?
You can approach @nliber for the technicalities of submitting both R25, R26 to the same ML.

Cool, sounds good- Nevin says there's no issue with any of that :)
M

Done.

P0447R24 Introduction of std::hive to the standard library (Matt Bentley)

P0447R25 Introduction of std::hive to the standard library (Matt Bentley)

P0447R26 was forwarded to LWG on LEWG 2023 December electronic poll (P3054R0)