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wg21bot opened this issue Dec 19, 2023 · 20 comments · Fixed by cplusplus/draft#7680
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P3074 R7 trivial unions (was std::uninitialized<T>) #1734

wg21bot opened this issue Dec 19, 2023 · 20 comments · Fixed by cplusplus/draft#7680
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C++26 Targeted at C++26 CWG Core IS Ship vehicle: IS LWG Library plenary-approved Papers approved for inclusion in their target vehicle by plenary vote. size - medium paper size estimate straw-poll Straw poll

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wg21bot commented Dec 19, 2023 •
edited by inbal2l
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P3074R0 constexpr union lifetime (Barry Revzin)
@wg21bot wg21bot added the EWG Evolution label Dec 19, 2023
@wg21bot wg21bot added this to the 2024-telecon milestone Dec 19, 2023
@inbal2l inbal2l added IS Ship vehicle: IS C++26 Targeted at C++26 labels Dec 19, 2023
@hanickadot
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EWG telecon 31th January:

P3074R1: We prefer language based solution over library based solution

SF/F/N/A/SA
5/4/4/2/1

Consensus.

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wg21bot commented Feb 16, 2024

P3074R1 std::uninitialized<T> (Barry Revzin)

@wg21bot wg21bot changed the title P3074 R0 constexpr union lifetime P3074 R1 std::uninitialized&lt;T&gt; Feb 16, 2024
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wg21bot commented Feb 16, 2024

P3074R2 std::uninitialized<T> (Barry Revzin)

@wg21bot wg21bot changed the title P3074 R1 std::uninitialized&lt;T&gt; P3074 R2 std::uninitialized&lt;T&gt; Feb 16, 2024
@cor3ntin cor3ntin changed the title P3074 R2 std::uninitialized&lt;T&gt; P3074 R2 std::uninitialized<T> Feb 16, 2024
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hanickadot commented Mar 21, 2024 •
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EWG discussed P3074R2 in Tokyo on Thursday.

P3074 std::uninitialized: EWG is interested in solving presented problem (lazy initialization).

SF F N A SA
9 11 1 1 0

Consensus.

P3074 std::uninitialized: EWG prefers language solution to presented problem over std::uninitialized library type.

SF F N A SA
6 7 3 4 2

Not consensus.

P3074 std::uninitialized: Require to have language feature to appear only in limited context.

SF F N A SA
3 5 9 1 1

Not consensus.

@jfbastien jfbastien added the needs-revision Paper needs changes before it can proceed label Mar 22, 2024
@inbal2l inbal2l added the LEWG Library Evolution label Mar 25, 2024
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wg21bot commented Apr 17, 2024

P3074R3 trivial union (was std::uninitialized<T>) (Barry Revzin)

@wg21bot wg21bot removed the needs-revision Paper needs changes before it can proceed label Apr 17, 2024
@wg21bot wg21bot changed the title P3074 R2 std::uninitialized<T> P3074 R3 trivial union (was std::uninitialized&lt;T&gt;) Apr 17, 2024
@cor3ntin cor3ntin changed the title P3074 R3 trivial union (was std::uninitialized&lt;T&gt;) P3074 R3 trivial union (was std::uninitialized<T>;) Apr 17, 2024
@cor3ntin cor3ntin changed the title P3074 R3 trivial union (was std::uninitialized<T>;) P3074 R3 trivial union (was std::uninitialized<T>) Apr 17, 2024
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As of R3, this no longer impacts library.

@cor3ntin cor3ntin removed the LEWG Library Evolution label Apr 23, 2024
@inbal2l inbal2l added B3 - addition Bucket 3 as described by P0592: material that is not mentioned in P0592 size - medium paper size estimate labels Apr 23, 2024
@brevzin brevzin self-assigned this May 19, 2024
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jfbastien commented Jun 27, 2024 •
edited by brevzin
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Seen in EWG in St Louis:

Poll: P3074R3 — trivial union (was std::uninitialized), we are interested in pursuing solution “trivial union”.

SF F N A SA
0 3 13 4 1

Poll: P3074R3 — trivial union (was std::uninitialized), we are interested in pursuing solution “just make it work”.

SF F N A SA
4 14 3 2 0

Winner!!!

Poll: P3074R3 — trivial union (was std::uninitialized), we would rather have a library solution.

SF F N A SA
4 3 6 10 0

@jfbastien jfbastien added the needs-revision Paper needs changes before it can proceed label Jun 27, 2024
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wg21bot commented Sep 21, 2024

P3074R4 trivial unions (was std::uninitialized<T>) (Barry Revzin)

@wg21bot wg21bot removed the needs-revision Paper needs changes before it can proceed label Sep 21, 2024
@wg21bot wg21bot changed the title P3074 R3 trivial union (was std::uninitialized<T>) P3074 R4 trivial unions (was std::uninitialized&lt;T&gt;) Sep 21, 2024
@cor3ntin cor3ntin changed the title P3074 R4 trivial unions (was std::uninitialized&lt;T&gt;) P3074 R4 trivial unions (was std::uninitialized<T>) Sep 22, 2024
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Seen in EWG on Thursday:

Poll: P3074r4 — trivial unions (was std::uninitialized): forward to LEWG and CWG for inclusion in C++26.

SF F N A SA
8 14 0 0 0

Result: consensus in favor

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jwakely commented Dec 19, 2024

P3074R5 trivial unions (was std::uninitialized<T>) (Barry Revzin)

@jensmaurer jensmaurer removed the needs-revision Paper needs changes before it can proceed label Dec 19, 2024
@jensmaurer jensmaurer changed the title P3074R4 trivial unions (was std::uninitialized<T>) P3074 R5 trivial unions (was std::uninitialized<T>) Dec 19, 2024
@cplusplus cplusplus deleted a comment from Dani-Hub Dec 25, 2024
@JeffGarland JeffGarland removed the lwg-pending LWG Chair needs to disposition label Jan 7, 2025
@JeffGarland JeffGarland moved this to Tentatively Ready in 2025 Hagenberg LWG Schedule Jan 19, 2025
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Poll: P3074R5 trivial unions (was std::uninitialized): forward to CWG for inclusion in C++26.

SF F N A SA
4 21 6 5 1

Consensus in favor.

@jfbastien jfbastien added CWG Core and removed EWG Evolution labels Feb 10, 2025
@jensmaurer jensmaurer moved this from Waiting for subgroups to Ready for review in CWG Feb 10, 2025
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jensmaurer commented Feb 11, 2025 •
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CWG 2025-02-11 in Hagenberg: Approved.

@jensmaurer jensmaurer moved this from Ready for review to Approved for plenary vote in CWG Feb 11, 2025
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Late voting record, but LWG did approve the library change in Poland

Poll: LWG is happy with the library wording in P3074r4 for C++26?'

|F|A|N|
|8|0|0|

https://wiki.edg.com/bin/view/Wg21wroclaw2024/LWG20241122-p3074

@jensmaurer jensmaurer added straw-poll Straw poll and removed B3 - addition Bucket 3 as described by P0592: material that is not mentioned in P0592 straw-poll Straw poll labels Feb 12, 2025
@jensmaurer jensmaurer moved this from Approved for plenary vote to Ready for review in CWG Feb 13, 2025
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Issues discovered; needs CWG review of D3074R7.

@jensmaurer jensmaurer moved this from Ready for review to Approved for plenary vote in CWG Feb 14, 2025
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CWG 2025-02-14 in Hagenberg: Approved D3074R7 for the straw polls on Saturday.

@jensmaurer jensmaurer added the straw-poll Straw poll label Feb 14, 2025
@cor3ntin cor3ntin added the plenary-approved Papers approved for inclusion in their target vehicle by plenary vote. label Feb 15, 2025
@jensmaurer jensmaurer mentioned this issue Feb 16, 2025
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wg21bot commented Mar 19, 2025

P3074R6 trivial unions (was std::uninitialized<T>) (Barry Revzin)

@wg21bot wg21bot changed the title P3074 R5 trivial unions (was std::uninitialized<T>) P3074 R6 trivial unions (was std::uninitialized&lt;T&gt;) Mar 19, 2025
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wg21bot commented Mar 19, 2025

P3074R7 trivial unions (was std::uninitialized<T>) (Barry Revzin)

@wg21bot wg21bot changed the title P3074 R6 trivial unions (was std::uninitialized&lt;T&gt;) P3074 R7 trivial unions (was std::uninitialized&lt;T&gt;) Mar 19, 2025
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C++26 Targeted at C++26 CWG Core IS Ship vehicle: IS LWG Library plenary-approved Papers approved for inclusion in their target vehicle by plenary vote. size - medium paper size estimate straw-poll Straw poll
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2024 Poland LWG Schedule
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P3074R7 trivial unions (was std::uninitialized<T>) cplusplus/draft
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@bstamour @jfbastien @jwakely @cor3ntin @JeffGarland @hanickadot @inbal2l @brevzin @jensmaurer @wg21bot