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  1. Qt
  2. QTBUG-111926

QFlags doesn't support large (> sizeof(int)) enums

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P2: Important P2: Important
    • 6.9.0 FF
    • 6.5
    • Core: Other
    • None
    • 4bd703450 (dev), da4a6cf78 (dev), a017ee967 (dev), 7971dd213 (6.8), 0d26dc672 (dev), f85a17abe (dev), 21f04d5d2 (dev), 2effeb25c (dev), d41b87e06 (dev), 57a6e671d (dev), 094f7cab5 (dev), 82895a377 (dev), bc6dc807c (dev)

      First caught in https://codereview.qt-project.org/c/qt/qtbase/+/35764, with plans to introduce support in 5.1. Then we removed indications of that plan in https://codereview.qt-project.org/c/qt/qtbase/+/54720 (not sure why, though).

      Unless we need a guarantee that QFlags<T> is the same size for all T, using underlying_type<T> instead of int for sizeof(T) > sizeof(int) seems like an easy way out.

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            thiago Thiago Macieira
            fabiankosmale Fabian Kosmale
            Vladimir Minenko Vladimir Minenko
            Alex Blasche Alex Blasche
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              Created:
              Updated:
              Resolved: