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  1. Qt
  2. QTBUG-99122

std::aligned_{storage,union} are deprecated in C++23

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    • 2
    • 277c23956c (qt/qtbase/dev) 277c23956c (qt/tqtc-qtbase/dev) 53173a493b (qt/qtbase/6.3) 53173a493b (qt/tqtc-qtbase/6.3) 6f5d6373c9 (qt/tqtc-qtbase/6.2), a8df9a20a (tqtc/lts-6.2)
    • Team B Foundation Sprint 56

    Description

      See https://github.com/cplusplus/papers/issues/197 and wg21.link/p1413

      Suggested replacements:

      struct { alignas(T) unsigned char data[sizeof(T)]; } x;
// or
union { char dummy; T t; } x;

      Attachments

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-107569 Use of std::aligned_union and std::aligned_union_t deprecated in C++23

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          split to

          Task - A task that needs to be done. QTBUG-103321 Update Catch2 once https://github.com/catchorg/Catch2/issues/2419 is fixed

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed
          For Gerrit Dashboard: QTBUG-99122
          # Subject Branch Project Status CR V
          386420,2 QVarLengthArray: avoid std::aligned_storage (deprecated in C++23) dev qt/qtbase Status: MERGED +2 0
          386463,7 QGlobalStatic: don't use a std::aligned_union if we can be a union dev qt/qtbase Status: MERGED +2 0
          386487,2 QVarLengthArray: avoid std::aligned_storage (deprecated in C++23) 6.3 qt/qtbase Status: MERGED +2 0
          386488,3 QVarLengthArray: avoid std::aligned_storage (deprecated in C++23) 6.2 qt/qtbase Status: MERGED +2 0
          386923,2 QGlobalStatic: don't use a std::aligned_union if we can be a union 6.3 qt/qtbase Status: MERGED +2 0
          388250,2 QRandom: remove dead pre-C++11 code dev qt/qtbase Status: MERGED +2 0
          388533,2 QRandom: remove dead pre-C++11 code 6.3 qt/qtbase Status: MERGED +2 0
          410161,3 qv4string: port away from std::aligned_storage dev qt/qtdeclarative Status: MERGED +2 0
          410162,2 QHash: port away from std::aligned_storage dev qt/qtbase Status: MERGED +2 0
          410163,2 QRandomGenerator: port away from std::aligned_storage dev qt/qtbase Status: MERGED -1 0
          410164,4 tst_qobjectrace: fix potential UB (something with pointers and new) dev qt/qtbase Status: MERGED +2 0
          410165,1 tst_QObjectRace: port away from std::aligned_storage dev qt/qtbase Status: ABANDONED 0 0
          410197,2 QHash: port away from std::aligned_storage 6.3 qt/qtbase Status: MERGED +2 0
          410198,2 QRandomGenerator: port away from std::aligned_storage 6.3 qt/qtbase Status: MERGED +2 0
          410199,2 tst_qobjectrace: fix potential UB (something with pointers and new) 6.3 qt/qtbase Status: MERGED +2 0
          410200,2 QHash: port away from std::aligned_storage tqtc/lts-6.2 qt/tqtc-qtbase Status: MERGED +2 0
          410201,2 QRandomGenerator: port away from std::aligned_storage tqtc/lts-6.2 qt/tqtc-qtbase Status: MERGED +2 0
          410202,2 tst_qobjectrace: fix potential UB (something with pointers and new) tqtc/lts-6.2 qt/tqtc-qtbase Status: MERGED +2 0
          410399,2 qv4string: port away from std::aligned_storage 6.3 qt/qtdeclarative Status: MERGED +2 0
          410402,2 qv4string: port away from std::aligned_storage tqtc/lts-6.2 qt/tqtc-qtdeclarative Status: MERGED +2 0
          438472,2 QV4::Heap::SharedArrayBuffer: avoid std::aligned_storage (deprecated in C++23) dev qt/qtdeclarative Status: MERGED +2 0
          438476,2 Update Catch2 to v2.13.10 dev qt/qtbase Status: MERGED +2 0
          438477,3 Update Catch2 to v2.13.10 dev qt/qttools Status: MERGED +2 0
          438480,4 QApplicationStatic: avoid use of std::aligned_union dev qt/qtbase Status: MERGED +2 0
          438579,2 Update Catch2 to v2.13.10 6.4 qt/qttools Status: MERGED +2 0
          438582,2 QV4::Heap::SharedArrayBuffer: avoid std::aligned_storage (deprecated in C++23) 6.4 qt/qtdeclarative Status: MERGED +2 0
          438584,3 QV4::Heap::SharedArrayBuffer: avoid std::aligned_storage (deprecated in C++23) tqtc/lts-6.2 qt/tqtc-qtdeclarative Status: MERGED +2 0
          438585,2 Update Catch2 to v2.13.10 6.4 qt/qtbase Status: MERGED +2 0
          438586,2 Update Catch2 to v2.13.10 tqtc/lts-6.2 qt/tqtc-qtbase Status: MERGED +2 0
          438729,2 QApplicationStatic: avoid use of std::aligned_union 6.4 qt/qtbase Status: MERGED +2 0

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            People

              mmutz Marc Mutz
              mmutz Marc Mutz
              Vladimir Minenko Vladimir Minenko
              Alex Blasche Alex Blasche
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              Dates

                Created:
                Updated:
                Resolved:

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