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  1. Qt
  2. QTBUG-114824

'QMap::operator[](const Key &key) const' should return 'const' value

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    • Icon: Bug Bug
    • Resolution: Won't Do
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    • None
    • 6.3.2
    • Core: Containers and Algorithms
    • None
    • All

      Since Qt 6 (https://codereview.qt-project.org/c/qt/qtbase/+/297563),
      QMap::operator[](const Key &key) const declaration has been changed and
      began to return a non-constant value. This can lead to unexpected bugs in user code,
      which are no longer detected by the compiler (as it was in Qt 5).

      const QVariantMap map;
...
map["someKey"] = someValue; // now it's compiled!
...

      See https://codereview.qt-project.org/c/qt/qtbase/+/297563/comment/0ed12f8d_581ffbc7/

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            thiago Thiago Macieira
            studiosus Vladimir Belyavsky
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              Created:
              Updated:
              Resolved:

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