QVariant::Reference Class
template <typename Referred> class QVariant::ReferenceThe QVariant::Reference acts as a non-const reference to a QVariant. More...
This class was introduced in Qt 6.11.
Public Functions
| Reference(Referred &&referred) | |
| Reference(const Referred &referred) | |
| QVariant | operator QVariant() const |
| QVariant::Reference<Referred> & | operator=(QVariant::Reference<Referred> &&value) |
| QVariant::Reference<Referred> & | operator=(const QVariant &value) |
| QVariant::Reference<Referred> & | operator=(const QVariant::Reference<Referred> &value) |
Detailed Description
As the generic iterators don't actually instantiate a QVariant on each step, they cannot return a reference to one from operator*(). QVariant::Reference provides the same functionality as an actual reference to a QVariant would, but is backed a referred-to value given as template parameter. The template is implemented for QMetaSequence::Iterator and QMetaAssociation::Iterator.
Member Function Documentation
[explicit noexcept(...)] Reference::Reference(Referred &&referred)
Creates a QVariant::Reference from a referred.
Note: This function is noexcept when std::is_nothrow_move_constructible_v<Referred> is true.
[explicit noexcept(...)] Reference::Reference(const Referred &referred)
Creates a QVariant::Reference from a referred.
Note: This function is noexcept when std::is_nothrow_copy_constructible_v<Referred> is true.
[noexcept(...)] QVariant Reference::operator QVariant() const
Dereferences the reference to a QVariant. By default this instantiates a temporary QVariant::ConstReference and calls dereferences that. In cases where instantiating a temporary ConstReference is expensive, this method should be specialized.
Note: This function is noexcept when Referred::canNoexceptConvertToQVariant is true.
[noexcept(...)] QVariant::Reference<Referred> &Reference::operator=(QVariant::Reference<Referred> &&value)
Assigns a new value to the value referred to by this QVariant::Reference.
Note: This function is noexcept when Referred::canNoexceptAssignQVariant is true.
[noexcept(...)] QVariant::Reference<Referred> &Reference::operator=(const QVariant &value)
Assigns a new value to the value referred to by this QVariant::Reference. This method needs to be specialized for each Referred type. It is pre-defined for QMetaSequence::Iterator and QMetaAssociation::Iterator.
Note: This function is noexcept when Referred::canNoexceptAssignQVariant is true.
[noexcept(...)] QVariant::Reference<Referred> &Reference::operator=(const QVariant::Reference<Referred> &value)
Assigns a new value to the value referred to by this QVariant::Reference.
Note: This function is noexcept when Referred::canNoexceptAssignQVariant is true.
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