Variant Class Reference

This class is designed to facilitate the passing of simple type parameters such as qlonglong, double, int, and QString to the CSTL (C++ Server Pages Standard Tags Library). More...

#include <variant.h>

Inheritance diagram for Variant:

Public Slots
int	toInt (bool *ok=nullptr) const noexcept
	Returns the variant as an int if the variant has userType() QMetaType::Int, QMetaType::Bool, QMetaType::QByteArray, QMetaType::QChar, QMetaType::Double, QMetaType::LongLong, QMetaType::QString, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns 0. More...
void	setInt (int value) noexcept
	Constructs a new variant with an int value.
double	toDouble (bool *ok=nullptr) const noexcept
	Returns the variant as a double if the variant has userType() QMetaType::Double, QMetaType::Float, QMetaType::Bool, QMetaType::QByteArray, QMetaType::Int, QMetaType::LongLong, QMetaType::QString, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns 0.0. More...
void	setDouble (double value) noexcept
	Constructs a new variant with an double value.
qlonglong	toLongLong (bool *ok=nullptr) const noexcept
	Returns the variant as a long long int if the variant has userType() QMetaType::LongLong, QMetaType::Bool, QMetaType::QByteArray, QMetaType::QChar, QMetaType::Double, QMetaType::Int, QMetaType::QString, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns 0. More...
void	setLongLong (qlonglong value) noexcept
	Constructs a new variant with an qlonglong value.
QString	toString () const noexcept
	Returns the variant as a QString if the variant has userType() QMetaType::QString, QMetaType::Bool, QMetaType::QByteArray, QMetaType::QChar, QMetaType::QDate, QMetaType::QDateTime, QMetaType::Double, QMetaType::Int, QMetaType::LongLong, QMetaType::QStringList, QMetaType::QTime, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns an empty string.
void	setString (const QString &value) noexcept
	Constructs a new variant with an QString value.

Public Member Functions
	Variant ()=default
	Constructs an invalid variant.
	Variant (int value)
	Constructs a new variant with an integer value.
	Variant (double value)
	Constructs a new variant with an double value.
	Variant (qlonglong value)
	Constructs a new variant with an qlonglong value.
	Variant (const QString &value)
	Constructs a new variant with an QString value.
	Variant (const QByteArray &value)
	Constructs a new variant and converts to QString.

Detailed Description

This class is designed to facilitate the passing of simple type parameters such as qlonglong, double, int, and QString to the CSTL (C++ Server Pages Standard Tags Library).

Member Function Documentation

toDouble

double Variant::toDouble ( bool *  ok = nullptr ) const

inlineslotnoexcept

Returns the variant as a double if the variant has userType() QMetaType::Double, QMetaType::Float, QMetaType::Bool, QMetaType::QByteArray, QMetaType::Int, QMetaType::LongLong, QMetaType::QString, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns 0.0.

Parameters

If	ok is non-null: *ok is set to true if the value could be converted to a double; otherwise *ok is set to false.

toInt

int Variant::toInt ( bool *  ok = nullptr ) const

inlineslotnoexcept

Returns the variant as an int if the variant has userType() QMetaType::Int, QMetaType::Bool, QMetaType::QByteArray, QMetaType::QChar, QMetaType::Double, QMetaType::LongLong, QMetaType::QString, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns 0.

Warning

: If the value is convertible to a QMetaType::LongLong but is too large to be represented in an int, the resulting arithmetic overflow will not be reflected in ok. A simple workaround is to use QString::toInt()

Parameters

If	ok is non-null: *ok is set to true if the value could be converted to an int; otherwise *ok is set to false.

toLongLong

qlonglong Variant::toLongLong ( bool *  ok = nullptr ) const

inlineslotnoexcept

Returns the variant as a long long int if the variant has userType() QMetaType::LongLong, QMetaType::Bool, QMetaType::QByteArray, QMetaType::QChar, QMetaType::Double, QMetaType::Int, QMetaType::QString, QMetaType::UInt, or QMetaType::ULongLong; otherwise returns 0.

Parameters

If	ok is non-null: *ok is set to true if the value could be converted to an int; otherwise *ok is set to false.

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

• /home/herik/CPPWebFramework/CPPWebFramework/cwf/variant.h