Provides different standard constants.

#include <QtxEvalExpr.h>

Inheritance diagram for QtxEvalSetConst:

Public Member Functions
	QtxEvalSetConst ()

virtual	~QtxEvalSetConst ()
	Destructor. More...

virtual QString	name () const
	Get operations set name. More...

virtual bool	createValue (const QString &, QVariant &) const
	Create value from its string representation. More...

virtual void	operationList (QStringList &) const
	Get the list of possible operations. More...

virtual void	bracketsList (QStringList &, bool open) const
	Get list of brackets. More...

virtual int	priority (const QString &, bool isBin) const
	Get the operation priority. More...

virtual QtxEvalExpr::Error	isValid (const QString &, const QVariant::Type, const QVariant::Type) const
	Check operation validity. More...

virtual QtxEvalExpr::Error	calculate (const QString &, QVariant &, QVariant &) const
	Calculate the operation. More...

Public Member Functions inherited from QtxEvalSet
	QtxEvalSet ()
	Constructor. More...

virtual	~QtxEvalSet ()
	Destructor. More...

Static Public Member Functions
static QString	Name ()
	Get operations set name. More...

Constructor & Destructor Documentation

QtxEvalSetConst::QtxEvalSetConst ( )

QtxEvalSetConst::~QtxEvalSetConst ( )

virtual

Member Function Documentation

void QtxEvalSetConst::bracketsList	(	QStringList &	,
		bool	open
	)		const

virtual

Parameters

list	returning list of brackets (not used)
open	if `true`, collect opening brackets, or closing brackets otherwise (not used)

Implements QtxEvalSet.

QtxEvalExpr::Error QtxEvalSetConst::calculate	(	const QString &	,
		QVariant &	,
		QVariant &
	)		const

virtual

Always returns QtxEvalExpr::InvalidOperation.

Parameters

op	operation name (not used)
v1	first argument (not valid for unary prefix operations) (not used)
v2	second argument (not valid for unary postfix operations) (not used)

Returns: error code (QtxEvalExpr::Error)

Implements QtxEvalSet.

References QtxEvalExpr::InvalidOperation.

bool QtxEvalSetConst::createValue	(	const QString &	str,
		QVariant &	val
	)		const

virtual

Convert constant name to its value.

Parameters

str	string representration of the constant
val	returning value

Returns: true if str can be evaluated as custom value and false otherwise (parameter)

Reimplemented from QtxEvalSet.

QtxEvalExpr::Error QtxEvalSetConst::isValid	(	const QString &	,
		const QVariant::Type	,
		const QVariant::Type
	)		const

virtual

Always returns QtxEvalExpr::InvalidOperation.

Parameters

op	operation (not used)
t1	first operand type (not used)
t2	second operand type (not used)

Returns: error code (QtxEvalExpr::Error)

Implements QtxEvalSet.

References QtxEvalExpr::InvalidOperation.

QString QtxEvalSetConst::Name ( )

static

Returns: operations set name

QString QtxEvalSetConst::name ( ) const

virtual

Returns: operations set name

Implements QtxEvalSet.

References Name().

void QtxEvalSetConst::operationList ( QStringList & ) const

virtual

Parameters

list	returning list of operations supported by the class (not used)

Implements QtxEvalSet.

int QtxEvalSetConst::priority	(	const QString &	,
		bool	isBin
	)		const

virtual

Operation priority counts from 1. If the operation is impossible, this function returns value <= 0.

Parameters

op	operation (not used)
isBin	`true` if the operation is binary and `false` if it is unary (not used)

Returns: operation priority

Implements QtxEvalSet.

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

src/Qtx/QtxEvalExpr.h
src/Qtx/QtxEvalExpr.cxx

Public Member Functions

Static Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation