A composite node that compares left and right expressions for equality. More...

#include <CompositeEqualityNode.h>

Inheritance diagram for madara::expression::CompositeEqualityNode:

Collaboration diagram for madara::expression::CompositeEqualityNode:

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Public Member Functions
	CompositeEqualityNode (logger::Logger &logger, ComponentNode left, ComponentNode right)
	Constructor. More...

virtual void	accept (Visitor &visitor) const
	Accepts a visitor subclassed from the Visitor class. More...

virtual madara::knowledge::KnowledgeRecord	evaluate (const madara::knowledge::KnowledgeUpdateSettings &settings)
	Evaluates the expression tree. More...

virtual madara::knowledge::KnowledgeRecord	item (void) const
	Returns the printable character of the node. More...

virtual ComponentNode *	left (void) const
	Returns the left expression. More...

virtual madara::knowledge::KnowledgeRecord	prune (bool &can_change)
	Prunes the expression tree of unnecessary nodes. More...

virtual ComponentNode *	right (void) const
	Returns the right expression. More...

void	set_logger (logger::Logger &logger)
	Sets the logger for printing errors and debugging info. More...

Protected Attributes
ComponentNode *	left_
	left expression More...

logger::Logger *	logger_
	handle the context More...

ComponentNode *	right_
	Right expression. More...

Detailed Description

A composite node that compares left and right expressions for equality.

Definition at line 22 of file CompositeEqualityNode.h.

Constructor & Destructor Documentation

madara::expression::CompositeEqualityNode::CompositeEqualityNode	(	logger::Logger &	logger,
		ComponentNode *	left,
		ComponentNode *	right
	)

Constructor.

Parameters

logger	the logger to use for printing
left	left expression
right	right expression

Definition at line 18 of file CompositeEqualityNode.cpp.

Member Function Documentation

void madara::expression::CompositeEqualityNode::accept ( Visitor & visitor ) const

virtual

Accepts a visitor subclassed from the Visitor class.

Parameters

visitor visitor instance to use

Reimplemented from madara::expression::ComponentNode.

Definition at line 97 of file CompositeEqualityNode.cpp.

madara::knowledge::KnowledgeRecord madara::expression::CompositeEqualityNode::evaluate ( const madara::knowledge::KnowledgeUpdateSettings & settings )

virtual

Evaluates the expression tree.

Evaluates the node and its children.

Parameters

settings settings for evaluating the node

Returns: 0 if left expression does not equal right expression and 1 otherwise

This does not prune any of the expression tree, and is much faster than the prune function

Implements madara::expression::ComponentNode.

Definition at line 87 of file CompositeEqualityNode.cpp.

madara::knowledge::KnowledgeRecord madara::expression::CompositeEqualityNode::item ( void ) const

virtual

Returns the printable character of the node.

Returns: value of the node

Reimplemented from madara::expression::ComponentNode.

Definition at line 26 of file CompositeEqualityNode.cpp.

madara::expression::ComponentNode * madara::expression::CompositeBinaryNode::left ( void ) const

virtualinherited

Returns the left expression.

Returns: a pointer to the left expression

Reimplemented from madara::expression::ComponentNode.

Definition at line 27 of file CompositeBinaryNode.cpp.

madara::knowledge::KnowledgeRecord madara::expression::CompositeEqualityNode::prune ( bool & can_change )

virtual

Prunes the expression tree of unnecessary nodes.

Prune the tree of unnecessary nodes.

Parameters

can_change set to true if variable nodes are contained

Returns: 0 if left expression does not equal right expression and 1 otherwise

Returns evaluation of the node and sets can_change appropriately. if this node can be changed, that means it shouldn't be pruned.

Implements madara::expression::ComponentNode.

Definition at line 38 of file CompositeEqualityNode.cpp.

madara::expression::ComponentNode * madara::expression::CompositeUnaryNode::right ( void ) const

virtualinherited

Returns the right expression.

Returns: a pointer to the right expression

Reimplemented from madara::expression::ComponentNode.

Definition at line 24 of file CompositeUnaryNode.cpp.

void madara::expression::ComponentNode::set_logger ( logger::Logger & logger )

inherited

Sets the logger for printing errors and debugging info.

Parameters

logger the logger to use

Definition at line 53 of file ComponentNode.cpp.

Member Data Documentation

ComponentNode* madara::expression::CompositeBinaryNode::left_

protectedinherited

left expression

Definition at line 47 of file CompositeBinaryNode.h.

logger::Logger* madara::expression::ComponentNode::logger_

protectedinherited

handle the context

Definition at line 96 of file ComponentNode.h.

ComponentNode* madara::expression::CompositeUnaryNode::right_

protectedinherited

Right expression.

Definition at line 43 of file CompositeUnaryNode.h.

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

include/madara/expression/CompositeEqualityNode.h
include/madara/expression/CompositeEqualityNode.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation