QVariant::Private Struct Reference

#include <qvariant.h>

Collaboration diagram for QVariant::Private:

Public Member Functions
constexpr	Private () noexcept
	Private (const QtPrivate::QMetaTypeInterface *iface) noexcept
template<typename T >
	Private (std::piecewise_construct_t, const T &t)
const void *	storage () const
template<typename T >
const T &	get () const
const QtPrivate::QMetaTypeInterface *	typeInterface () const
QMetaType	type () const

Static Public Member Functions
static constexpr bool	canUseInternalSpace (const QtPrivate::QMetaTypeInterface *type)

Public Attributes
union {
uchar   data [MaxInternalSize] = {}
PrivateShared *   shared
double   _forAlignment
}	data
quintptr	is_shared: 1
quintptr	is_null: 1
quintptr	packedType: sizeof(QMetaType) * 8 - 2

Static Public Attributes
static constexpr size_t	MaxInternalSize = 3 * sizeof(void *)
template<size_t S>
static constexpr bool	FitsInInternalSize = S <= MaxInternalSize
template<typename T >
static constexpr bool	CanUseInternalSpace

Detailed Description

Definition at line 97 of file qvariant.h.

Constructor & Destructor Documentation

Private() [1/3]

constexpr QVariant::Private::Private ( )

inlineconstexprnoexcept

Definition at line 120 of file qvariant.h.

Private() [2/3]

QVariant::Private::Private ( const QtPrivate::QMetaTypeInterface * iface )

inlineexplicitnoexcept

Definition at line 76 of file qvariant_p.h.

References Q_ASSERT.

Private() [3/3]

template<typename T >

QVariant::Private::Private ( std::piecewise_construct_t , const T & t )

inlineexplicit

Definition at line 83 of file qvariant_p.h.

References QVariant::QVariant(), customConstructShared(), packedType, and Q_ASSERT.

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Member Function Documentation

canUseInternalSpace()

static constexpr bool QVariant::Private::canUseInternalSpace ( const QtPrivate::QMetaTypeInterface * type )

inlinestaticconstexpr

Definition at line 103 of file qvariant.h.

References Q_ASSERT, and QMetaType::RelocatableType.

Referenced by createVariantData().

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get()

template<typename T >

const T & QVariant::Private::get ( ) const

inline

Definition at line 128 of file qvariant.h.

Referenced by QVariant::isNull(), and QVariant::toBool().

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storage()

const void * QVariant::Private::storage ( ) const

inline

Definition at line 124 of file qvariant.h.

Referenced by QVariant::equals().

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type()

QMetaType QVariant::Private::type ( ) const

inline

Definition at line 136 of file qvariant.h.

Referenced by QVariant::compare(), QVariant::convert(), QVariant::convert(), QVariant::equals(), QVariant::isValid(), QVariant::load(), QVariant::metaType(), QVariant::save(), QVariant::toBool(), QVariant::typeName(), and QVariant::view().

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typeInterface()

const QtPrivate::QMetaTypeInterface * QVariant::Private::typeInterface ( ) const

inline

Definition at line 131 of file qvariant.h.

Referenced by QVariant::detach().

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Member Data Documentation

_forAlignment

double QVariant::Private::_forAlignment

Definition at line 114 of file qvariant.h.

CanUseInternalSpace

template<typename T >

constexpr bool QVariant::Private::CanUseInternalSpace

staticconstexpr

Initial value:

=
                (QTypeInfo<T>::isRelocatable && FitsInInternalSize<sizeof(T)> && alignof(T) <= alignof(double))

Definition at line 101 of file qvariant.h.

data [1/2]

uchar QVariant::Private::data[MaxInternalSize] = {}

Definition at line 112 of file qvariant.h.

Referenced by QVariant::~QVariant(), QVariant::clear(), QV4::coerce(), QVariant::detach(), QVariant::isDetached(), QQmlVMEMetaObject::metaCall(), QV4::ExecutionEngine::metaTypeFromJS(), QV4::ModelObjectOwnPropertyKeyIterator::next(), qtObjectFromJS(), QV4::ModelObject::virtualGet(), and QObjectPointerBinding::write().

[union] [2/2]

union { ... } QVariant::Private::data

FitsInInternalSize

template<size_t S>

constexpr bool QVariant::Private::FitsInInternalSize = S <= MaxInternalSize

staticconstexpr

Definition at line 100 of file qvariant.h.

is_null

quintptr QVariant::Private::is_null

Definition at line 117 of file qvariant.h.

Referenced by QVariant::convert(), QVariant::data(), QVariant::isNull(), QVariant::load(), and QVariant::save().

is_shared

quintptr QVariant::Private::is_shared

Definition at line 116 of file qvariant.h.

Referenced by QVariant::~QVariant(), QVariant::clear(), QVariant::detach(), and QVariant::isDetached().

MaxInternalSize

constexpr size_t QVariant::Private::MaxInternalSize = 3 * sizeof(void *)

staticconstexpr

Definition at line 99 of file qvariant.h.

packedType

quintptr QVariant::Private::packedType

Definition at line 118 of file qvariant.h.

Referenced by Private().

shared

PrivateShared* QVariant::Private::shared

Definition at line 113 of file qvariant.h.

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

• qtbase/src/corelib/kernel/qvariant.h (cdbc76360ae4c12b25923a7cb392355a6485fc70)
• qtbase/src/corelib/kernel/qvariant_p.h (0ecf8a21587e33c5c5b554d5bc059488001c8990)