QtxEvalSetConst Class Reference

Provides different standard constants.

#include <QtxEvalExpr.h>

Inheritance diagram for QtxEvalSetConst:

Public Member Functions
	QtxEvalSetConst ()
virtual	~QtxEvalSetConst ()
	Destructor.
virtual QString	name () const
	Get operations set name.
virtual bool	createValue (const QString &, QVariant &) const
	Create value from its string representation.
virtual void	operationList (QStringList &) const
	Get the list of possible operations.
virtual void	bracketsList (QStringList &, bool open) const
	Get list of brackets.
virtual int	priority (const QString &, bool isBin) const
	Get the operation priority.
virtual QtxEvalExpr::Error	isValid (const QString &, const QVariant::Type, const QVariant::Type) const
	Check operation validity.
virtual QtxEvalExpr::Error	calculate (const QString &, QVariant &, QVariant &) const
	Calculate the operation.
Static Public Member Functions
static QString	Name ()
	Get operations set name.

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Constructor & Destructor Documentation

QtxEvalSetConst::QtxEvalSetConst

(

)

QtxEvalSetConst::~QtxEvalSetConst

(

)

[virtual]

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Member Function Documentation

QString QtxEvalSetConst::Name

(

)

[static]

Returns:

operations set name

QString QtxEvalSetConst::name

(

)

const [virtual]

Returns:

operations set name

Implements QtxEvalSet.

References Name().

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.

void QtxEvalSetConst::operationList

(

QStringList &

)

const [virtual]

Parameters:

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

Implements QtxEvalSet.

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.

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.

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.

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.