LWG2899: is_(nothrow_)move_constructible and tuple, optional and unique_ptr #100255

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1. cjdb

   added

   good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

   libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

   c++20

   lwg-issueCanonical version of a Library Working Group issue.Canonical version of a Library Working Group issue.

   on Jul 23, 2024
2. llvmbot commented on Jul 23, 2024

   

   llvmbot

   on Jul 23, 2024

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   Hi!

   This issue may be a good introductory issue for people new to working on LLVM. If you would like to work on this issue, your first steps are:

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3. llvmbot commented on Jul 23, 2024

   

   llvmbot

   on Jul 23, 2024

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   @llvm/issue-subscribers-good-first-issue

   Author: Christopher Di Bella (cjdb)

   Details

   **Link:** https://wg21.link/lwg2899
4. llvmbot commented on Jul 23, 2024

   

   llvmbot

   on Jul 23, 2024

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   @llvm/issue-subscribers-c-20

   Author: Christopher Di Bella (cjdb)

   Details

   **Link:** https://wg21.link/lwg2899
5. ldionne

   added this to libc++ Standards Conformanceon Jul 30, 2024
6. cjdb

   added

   potentially good for outreachConsider this issue as a good first issue for someone that has spoken to an experienced LLVM devConsider this issue as a good first issue for someone that has spoken to an experienced LLVM dev

   and removed

   good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

   on Aug 1, 2024
7. ldionne

   changed the title [-]Apply 'LWG2899 `is_(nothrow_)move_constructible` and `tuple`, `optional` and `unique_ptr`'[/-] [+]LWG2899: `is_(nothrow_)move_constructible` and `tuple`, `optional` and `unique_ptr`[/+] on Aug 1, 2024
8. ldionne

   moved this to Todo in libc++ Standards Conformanceon Aug 21, 2024
9. frederick-vs-ja commented on Nov 8, 2025

   

   frederick-vs-ja

   on Nov 8, 2025

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   optional was excluded from the final resolution. The tuple part is probably naturally implemented (by = default;) but it seems better to add some test cases. The unique_ptr part is not yet implemented.

   I'm working on this now.
10. frederick-vs-ja

    self-assigned this

    on Nov 8, 2025
11. frederick-vs-ja

    closed this as completedin #167211on Aug 6, 2026
12. github-project-automation

    moved this from Todo to Done in libc++ Standards Conformanceon Aug 6, 2026