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P3450R1: Extend std::is_within_lifetime #189610

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#201053
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P3450R1: Extend std::is_within_lifetime#189610
#201053
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frederick-vs-ja
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c++26libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.wg21-paperIssues representing the implementation of a WG21 paper

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@frederick-vs-ja
frederick-vs-ja
opened on Mar 31, 2026

Link: https://wg21.link/P3450R1

Feature-test macro (updated):

#define __cpp_lib_is_within_lifetime                202603L // freestanding, also in <type_traits>

Activity

  1. frederick-vs-ja
    added
    libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.
    c++26
    wg21-paperIssues representing the implementation of a WG21 paper
    on Mar 31, 2026
  2. ldionne
    added this to libc++ Standards Conformanceon Apr 9, 2026
  3. ldionne
    moved this to Todo in libc++ Standards Conformanceon Apr 9, 2026

  4. frederick-vs-ja commented on Jun 2, 2026

    @frederick-vs-ja
    frederick-vs-ja
    on Jun 2, 2026
    ContributorAuthor

    I think I can work on this.

  5. frederick-vs-ja
    self-assigned this
    on Jun 2, 2026
  6. frederick-vs-ja
    closed this as completedin #201053on Sep 22, 2026
  7. github-project-automation
    moved this from Todo to Done in libc++ Standards Conformanceon Sep 22, 2026
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