QVariant::Reference< Referred > Class Template Reference

The QVariant::Reference acts as a non-const reference to a QVariant. More...

#include <qvariant.h>

Collaboration diagram for QVariant::Reference< Referred >:

Public Member Functions
	Reference (const Referred &referred) noexcept(std::is_nothrow_copy_constructible_v< Referred >)
	Creates a QVariant::Reference from a referred.
	Reference (Referred &&referred) noexcept(std::is_nothrow_move_constructible_v< Referred >)
	Creates a QVariant::Reference from a referred.
	Reference (const Reference &)=default
	Reference (Reference &&)=default
	~Reference ()=default
Reference &	operator= (const Reference &value) noexcept(Referred::canNoexceptAssignQVariant)
	Assigns a new value to the value referred to by this QVariant::Reference.
Reference &	operator= (Reference &&value) noexcept(Referred::canNoexceptAssignQVariant)
	Assigns a new value to the value referred to by this QVariant::Reference.
	operator QVariant () const noexcept(Referred::canNoexceptConvertToQVariant)
	Dereferences the reference to a QVariant.
void	swap (Reference b)
Reference &	operator= (const QVariant &value) noexcept(Referred::canNoexceptAssignQVariant)
	Assigns a new value to the value referred to by this QVariant::Reference.

Friends
void	swap (Reference a, Reference b)

Detailed Description

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

The QVariant::Reference acts as a non-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::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.

Definition at line 270 of file qvariant.h.

Constructor & Destructor Documentation

Reference() [1/4]

template<typename Referred>

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

inlineexplicitnoexcept

Creates a QVariant::Reference from a referred.

Definition at line 280 of file qvariant.h.

Reference() [2/4]

template<typename Referred>

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

inlineexplicitnoexcept

Creates a QVariant::Reference from a referred.

Definition at line 283 of file qvariant.h.

Reference() [3/4]

template<typename Referred>

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

default

Reference() [4/4]

template<typename Referred>

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

default

~Reference()

template<typename Referred>

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

default

Member Function Documentation

operator QVariant()

template<typename Referred>

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

inlinenoexcept

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.

Definition at line 302 of file qvariant.h.

operator=() [1/3]

template<typename Referred>

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

noexcept

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.

operator=() [2/3]

template<typename Referred>

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

inlinenoexcept

Assigns a new value to the value referred to by this QVariant::Reference.

Definition at line 290 of file qvariant.h.

operator=() [3/3]

template<typename Referred>

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

inlinenoexcept

Assigns a new value to the value referred to by this QVariant::Reference.

Definition at line 296 of file qvariant.h.

swap()

template<typename Referred>

void QVariant::Reference< Referred >::swap ( Reference< Referred > b )

inline

Definition at line 307 of file qvariant.h.

Friends And Related Symbol Documentation

swap

template<typename Referred>

void swap ( Reference< Referred > a, Reference< Referred > b )

friend

Definition at line 275 of file qvariant.h.

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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)