#include <qgsexpression.h>

Inheritance diagram for QgsExpression::NodeBinaryOperator:

Public Member Functions
	NodeBinaryOperator (BinaryOperator op, Node opLeft, Node opRight)

	~NodeBinaryOperator ()

virtual void	accept (Visitor &v) const override
	Support the visitor pattern. More...

virtual Node *	clone () const override
	Generate a clone of this node. More...

virtual QString	dump () const override
	Abstract virtual dump method. More...

virtual QVariant	eval (QgsExpression parent, const QgsExpressionContext context) override
	Abstract virtual eval method Errors are reported to the parent. More...

bool	leftAssociative () const

virtual bool	needsGeometry () const override
	Abstract virtual method which returns if the geometry is required to evaluate this expression. More...

virtual NodeType	nodeType () const override
	Abstract virtual that returns the type of this node. More...

BinaryOperator	op () const

Node *	opLeft () const

Node *	opRight () const

int	precedence () const

virtual bool	prepare (QgsExpression parent, const QgsExpressionContext context) override
	Abstract virtual preparation method Errors are reported to the parent. More...

virtual QStringList	referencedColumns () const override
	Abstract virtual method which returns a list of columns required to evaluate this node. More...

Public Member Functions inherited from QgsExpression::Node
virtual	~Node ()

virtual Q_DECL_DEPRECATED QVariant	eval (QgsExpression parent, const QgsFeature f)
	Abstract virtual eval method Errors are reported to the parent. More...

virtual Q_DECL_DEPRECATED bool	prepare (QgsExpression *parent, const QgsFields &fields)
	Abstract virtual preparation method Errors are reported to the parent. More...

Protected Member Functions
bool	compare (double diff)

QDateTime	computeDateTimeFromInterval (const QDateTime &d, QgsInterval *i)
	Computes the result date time calculation from a start datetime and an interval. More...

double	computeDouble (double x, double y)

int	computeInt (int x, int y)

Protected Attributes
BinaryOperator	mOp

Node *	mOpLeft

Node *	mOpRight

Detailed Description

Definition at line 1121 of file qgsexpression.h.

Constructor & Destructor Documentation

◆ NodeBinaryOperator()

QgsExpression::NodeBinaryOperator::NodeBinaryOperator	(	BinaryOperator	op,
		Node *	opLeft,
		Node *	opRight
	)

inline

Definition at line 1124 of file qgsexpression.h.

◆ ~NodeBinaryOperator()

QgsExpression::NodeBinaryOperator::~NodeBinaryOperator ( )

inline

Definition at line 1129 of file qgsexpression.h.

Member Function Documentation

◆ accept()

virtual void QgsExpression::NodeBinaryOperator::accept ( Visitor & v ) const

inlineoverridevirtual

Support the visitor pattern.

For any implementation this should look like

C++:

v.visit( *this );

Python:

v.visit( self)

Parameters

v	A visitor that visits this node.

Implements QgsExpression::Node.

Definition at line 1142 of file qgsexpression.h.

◆ clone()

QgsExpression::Node * QgsExpression::NodeBinaryOperator::clone ( ) const

overridevirtual

Generate a clone of this node.

Make sure that the clone does not contain any information which is generated in prepare and context related. Ownership is transferred to the caller.

Returns: a deep copy of this node.

Implements QgsExpression::Node.

Definition at line 4608 of file qgsexpression.cpp.

◆ compare()

bool QgsExpression::NodeBinaryOperator::compare ( double diff )

protected

Definition at line 4412 of file qgsexpression.cpp.

◆ computeDateTimeFromInterval()

QDateTime QgsExpression::NodeBinaryOperator::computeDateTimeFromInterval	(	const QDateTime &	d,
		QgsInterval *	i
	)

protected

Computes the result date time calculation from a start datetime and an interval.

Parameters

d	start datetime
i	interval to add or subtract (depending on mOp)

Definition at line 4454 of file qgsexpression.cpp.

◆ computeDouble()

double QgsExpression::NodeBinaryOperator::computeDouble	(	double	x,
		double	y
	)

protected

Definition at line 4468 of file qgsexpression.cpp.

◆ computeInt()

int QgsExpression::NodeBinaryOperator::computeInt	(	int	x,
		int	y
	)

protected

Definition at line 4434 of file qgsexpression.cpp.

◆ dump()

QString QgsExpression::NodeBinaryOperator::dump ( ) const

overridevirtual

Abstract virtual dump method.

Returns: An expression which represents this node as string

Implements QgsExpression::Node.

Definition at line 4577 of file qgsexpression.cpp.

◆ eval()

QVariant QgsExpression::NodeBinaryOperator::eval	(	QgsExpression *	parent,
		const QgsExpressionContext *	context
	)

overridevirtual

Abstract virtual eval method Errors are reported to the parent.

Note: added in QGIS 2.12

Reimplemented from QgsExpression::Node.

Definition at line 4133 of file qgsexpression.cpp.

◆ leftAssociative()

bool QgsExpression::NodeBinaryOperator::leftAssociative ( ) const

Definition at line 4541 of file qgsexpression.cpp.

◆ needsGeometry()

virtual bool QgsExpression::NodeBinaryOperator::needsGeometry ( ) const

inlineoverridevirtual

Abstract virtual method which returns if the geometry is required to evaluate this expression.

This needs to call needsGeometry() recursively on any child nodes.

Returns: true if a geometry is required to evaluate this expression

Implements QgsExpression::Node.

Definition at line 1141 of file qgsexpression.h.

◆ nodeType()

virtual NodeType QgsExpression::NodeBinaryOperator::nodeType ( ) const

inlineoverridevirtual

Abstract virtual that returns the type of this node.

Returns: The type of this node

Implements QgsExpression::Node.

Definition at line 1135 of file qgsexpression.h.

◆ op()

BinaryOperator QgsExpression::NodeBinaryOperator::op ( ) const

inline

Definition at line 1131 of file qgsexpression.h.

◆ opLeft()

Node* QgsExpression::NodeBinaryOperator::opLeft ( ) const

inline

Definition at line 1132 of file qgsexpression.h.

◆ opRight()

Node* QgsExpression::NodeBinaryOperator::opRight ( ) const

inline

Definition at line 1133 of file qgsexpression.h.

◆ precedence()

int QgsExpression::NodeBinaryOperator::precedence ( ) const

Definition at line 4495 of file qgsexpression.cpp.

◆ prepare()

bool QgsExpression::NodeBinaryOperator::prepare	(	QgsExpression *	parent,
		const QgsExpressionContext *	context
	)

overridevirtual

Abstract virtual preparation method Errors are reported to the parent.

Note: added in QGIS 2.12

Reimplemented from QgsExpression::Node.

Definition at line 4488 of file qgsexpression.cpp.

◆ referencedColumns()

virtual QStringList QgsExpression::NodeBinaryOperator::referencedColumns ( ) const

inlineoverridevirtual

Abstract virtual method which returns a list of columns required to evaluate this node.

When reimplementing this, you need to return any column that is required to evaluate this node and in addition recursively collect all the columns required to evaluate child nodes.

Returns: A list of columns required to evaluate this expression

Implements QgsExpression::Node.

Definition at line 1140 of file qgsexpression.h.

Member Data Documentation

◆ mOp

BinaryOperator QgsExpression::NodeBinaryOperator::mOp

protected

Definition at line 1159 of file qgsexpression.h.

◆ mOpLeft

Node* QgsExpression::NodeBinaryOperator::mOpLeft

protected

Definition at line 1160 of file qgsexpression.h.

◆ mOpRight

Node* QgsExpression::NodeBinaryOperator::mOpRight

protected

Definition at line 1161 of file qgsexpression.h.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/qgsexpression.h
/tmp/buildd/qgis-2.18.21+99unstable/src/core/qgsexpression.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ NodeBinaryOperator()

◆ ~NodeBinaryOperator()

Member Function Documentation

◆ accept()

◆ clone()

◆ compare()

◆ computeDateTimeFromInterval()

◆ computeDouble()

◆ computeInt()

◆ dump()

◆ eval()

◆ leftAssociative()

◆ needsGeometry()

◆ nodeType()

◆ op()

◆ opLeft()

◆ opRight()

◆ precedence()

◆ prepare()

◆ referencedColumns()

Member Data Documentation

◆ mOp

◆ mOpLeft

◆ mOpRight