madara::expression::CompositePredecrementNode Class Reference

A composite node that decrements a right expression. More...

#include <CompositePredecrementNode.h>

Inheritance diagram for madara::expression::CompositePredecrementNode:

Collaboration diagram for madara::expression::CompositePredecrementNode:

Public Member Functions
	CompositePredecrementNode (logger::Logger &logger, ComponentNode *right)
	Constructor. More...
virtual	~CompositePredecrementNode (void)
	Destructor. 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 node. 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
logger::Logger *	logger_
	handle the context More...
ComponentNode *	right_
	Right expression. More...

Private Attributes
CompositeArrayReference *	array_
	variable index holder More...
VariableNode *	var_
	variable holder More...

Detailed Description

A composite node that decrements a right expression.

If right expression is a variable, then the variable will be updated with the new value.

Definition at line 25 of file CompositePredecrementNode.h.

Constructor & Destructor Documentation

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

Constructor.

Parameters

logger	the logger to use for printing
right	right expression

Definition at line 16 of file CompositePredecrementNode.cpp.

madara::expression::CompositePredecrementNode::~CompositePredecrementNode ( void  )

virtual

Destructor.

Definition at line 27 of file CompositePredecrementNode.cpp.

Member Function Documentation

void madara::expression::CompositePredecrementNode::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 86 of file CompositePredecrementNode.cpp.

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

virtual

Evaluates the node.

Evaluates the node and its children.

Parameters

settings

settings for evaluating the node

Returns

one subtracted from the value returned by the right expression

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

Implements madara::expression::ComponentNode.

Definition at line 73 of file CompositePredecrementNode.cpp.

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

virtual

Returns the printable character of the node.

Returns

value of the node

Reimplemented from madara::expression::ComponentNode.

Definition at line 32 of file CompositePredecrementNode.cpp.

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

virtualinherited

Returns the left expression.

Returns

a pointer to the left expression

Reimplemented in madara::expression::CompositeBinaryNode.

Definition at line 34 of file ComponentNode.cpp.

madara::knowledge::KnowledgeRecord madara::expression::CompositePredecrementNode::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

one subtracted from the value returned by the right expression

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 43 of file CompositePredecrementNode.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

CompositeArrayReference* madara::expression::CompositePredecrementNode::array_

private

variable index holder

Definition at line 76 of file CompositePredecrementNode.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.

VariableNode* madara::expression::CompositePredecrementNode::var_

private

variable holder

Definition at line 73 of file CompositePredecrementNode.h.

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

• include/madara/expression/CompositePredecrementNode.h
• include/madara/expression/CompositePredecrementNode.cpp