QVariant::ConstReference< Referred > Class Template Reference

The QVariant::ConstReference acts as a const reference to a QVariant. More...

#include <qvariant.h>

Collaboration diagram for QVariant::ConstReference< Referred >:

Public Member Functions
	ConstReference (const Referred &referred) noexcept(std::is_nothrow_copy_constructible_v< Referred >)
	Creates a QVariant::ConstReference from a referred.
	ConstReference (Referred &&referred) noexcept(std::is_nothrow_move_constructible_v< Referred >)
	Creates a QVariant::ConstReference from a referred.
	ConstReference (const ConstReference &)=default
	ConstReference (ConstReference &&)=default
	~ConstReference ()=default
ConstReference &	operator= (const ConstReference &value)=delete
ConstReference &	operator= (ConstReference &&value)=delete
	operator QVariant () const noexcept(Referred::canNoexceptConvertToQVariant)
	Dereferences the reference to a QVariant.

Detailed Description

template<typename Referred>
class QVariant::ConstReference< Referred >

The QVariant::ConstReference acts as a const reference to a QVariant.

Since

6.11 \inmodule QtCore

As the generic iterators don't actually instantiate a QVariant on each step, they cannot return a reference to one from operator*(). QVariant::ConstReference 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::ConstIterator, QMetaSequence::Iterator, QMetaAssociation::ConstIterator, and QMetaAssociation::Iterator.

Definition at line 245 of file qvariant.h.

Constructor & Destructor Documentation

ConstReference() [1/4]

template<typename Referred>

QVariant::ConstReference< Referred >::ConstReference ( const Referred & referred )

inlineexplicitnoexcept

Creates a QVariant::ConstReference from a referred.

Definition at line 253 of file qvariant.h.

ConstReference() [2/4]

template<typename Referred>

QVariant::ConstReference< Referred >::ConstReference ( Referred && referred )

inlineexplicitnoexcept

Creates a QVariant::ConstReference from a referred.

Definition at line 256 of file qvariant.h.

ConstReference() [3/4]

template<typename Referred>

QVariant::ConstReference< Referred >::ConstReference ( const ConstReference< Referred > & )

default

ConstReference() [4/4]

template<typename Referred>

QVariant::ConstReference< Referred >::ConstReference ( ConstReference< Referred > && )

default

~ConstReference()

template<typename Referred>

QVariant::ConstReference< Referred >::~ConstReference ( )

default

Member Function Documentation

operator QVariant()

template<typename Referred>

QVariant::ConstReference< Referred >::operator QVariant ( ) const

noexcept

Dereferences the reference to a QVariant.

This method needs to be specialized for each Referred type. It is pre-defined for QMetaSequence::ConstIterator, QMetaSequence::Iterator, QMetaAssociation::ConstIterator, and QMetaAssociation::Iterator.

operator=() [1/2]

template<typename Referred>

ConstReference & QVariant::ConstReference< Referred >::operator= ( const ConstReference< Referred > & value )

delete

operator=() [2/2]

template<typename Referred>

ConstReference & QVariant::ConstReference< Referred >::operator= ( ConstReference< Referred > && value )

delete

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The documentation for this class was generated from the following files:

• qtbase/src/corelib/kernel/qvariant.h (aa113acde28292611a4774f6e755dda12c7964d6)
• qtbase/src/corelib/kernel/qvariant.cpp (aa113acde28292611a4774f6e755dda12c7964d6)