#include <qgsexpression.h>

Inheritance diagram for QgsExpression::NodeUnaryOperator:

Public Member Functions
	NodeUnaryOperator (UnaryOperator op, Node *operand)

	~NodeUnaryOperator ()

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

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...

UnaryOperator	op () const

Node *	operand () 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 Attributes
UnaryOperator	mOp

Node *	mOperand

Detailed Description

Definition at line 697 of file qgsexpression.h.

Constructor & Destructor Documentation

QgsExpression::NodeUnaryOperator::NodeUnaryOperator	(	UnaryOperator	op,
		Node *	operand
	)

inline

Definition at line 700 of file qgsexpression.h.

QgsExpression::NodeUnaryOperator::~NodeUnaryOperator ( )

inline

Definition at line 701 of file qgsexpression.h.

Member Function Documentation

virtual void QgsExpression::NodeUnaryOperator::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 713 of file qgsexpression.h.

QString QgsExpression::NodeUnaryOperator::dump ( ) const

overridevirtual

Abstract virtual dump method.

Returns: An expression which represents this node as string

Implements QgsExpression::Node.

Definition at line 2796 of file qgsexpression.cpp.

QVariant QgsExpression::NodeUnaryOperator::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 2763 of file qgsexpression.cpp.

virtual bool QgsExpression::NodeUnaryOperator::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 712 of file qgsexpression.h.

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

inlineoverridevirtual

Abstract virtual that returns the type of this node.

Returns: The type of this node

Implements QgsExpression::Node.

Definition at line 706 of file qgsexpression.h.

UnaryOperator QgsExpression::NodeUnaryOperator::op ( ) const

inline

Definition at line 703 of file qgsexpression.h.

Node* QgsExpression::NodeUnaryOperator::operand ( ) const

inline

Definition at line 704 of file qgsexpression.h.

bool QgsExpression::NodeUnaryOperator::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 2791 of file qgsexpression.cpp.

virtual QStringList QgsExpression::NodeUnaryOperator::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 711 of file qgsexpression.h.

Member Data Documentation

UnaryOperator QgsExpression::NodeUnaryOperator::mOp

protected

Definition at line 716 of file qgsexpression.h.

Node* QgsExpression::NodeUnaryOperator::mOperand

protected

Definition at line 717 of file qgsexpression.h.

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

/tmp/buildd/qgis-2.12.0+99unstable/src/core/qgsexpression.h
/tmp/buildd/qgis-2.12.0+99unstable/src/core/qgsexpression.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation