Replacing QVariant::type() when moving to Qt 6

Perdrix

Is this how it should be done:

#if QT_VERSION >= 0x060000
			switch (static_cast<QMetaType::Type>(value.typeId()))
#else
			switch (value.type())
#endif

Thank you
David

Paul Colby

Hi @Perdrix,

The short version: I would just use QVariant::userType().

Longer version:

The Qt6 cast should work fine, but the Qt5 version is still using the deprecated QVariant::Type. As per the QVariant::type() documentation:

the return value should be interpreted as QMetaType::Type.

So it should probably be more like:

#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
switch (static_cast<QMetaType::Type>(value.typeId()))
#else
switch (static_cast<QMetaType::Type>(value.type()))
#endif

However, once you're (correctly) casting both to QMetaType::Type, you could just use QVariant::userType() instead, since its the same signature on Qt5 and Qt6, eg:

switch (static_cast<QMetaType::Type>(value.userType()))

Cheers.

Perdrix

Many thanks
D.