QHashIterator with QMultiHash

beecksche

Hi,
in Qt 6.5, MSVC2019, 64bit (Qt 5.15 works by the way)

QMultiHash<QString, QString> multiHash;
QHashIterator<QString, QString> it(multiHash); // compile error: C2664

No matching constructor for initialization of 'QHashIterator<QString, QString>'
note: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'QMultiHash<QString, QString>' to 'const QHashIterator<QString, QString>' for 1st argument
note: candidate constructor (the implicit move constructor) not viable: no known conversion from 'QMultiHash<QString, QString>' to 'QHashIterator<QString, QString>' for 1st argument
note: candidate constructor not viable: no known conversion from 'QMultiHash<QString, QString>' to 'const QHash<QString, QString>' for 1st argument

Christian Ehrlicher

Looks like a documentation error which was not adjusted from Qt5 to Qt6 as QMultiHash no longer derives from QHash. You have to use QMultiHashIterator now or use c++ style iterators / range-based for loop.
I wonder why these iterators were not removed in Qt6 though...

/edit: https://bugreports.qt.io/browse/QTBUG-119461