Class NodeOptional

java.lang.Object

EDU.purdue.jtb.parser.syntaxtree.NodeOptional

All Implemented Interfaces:

INode, Serializable

public class NodeOptional
extends Object
implements INode

Represents a grammar optional node (? or []), e.g. ' ( A )? ' or ' [ A ] '.
The class stores the node.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
INode	node	The node (if null there is no node)

Fields inherited from interface INode

LS

Constructor Summary

Constructors

Constructor	Description
NodeOptional()	Initializes an empty NodeOptional.
NodeOptional(INode n)	Initializes a NodeOptional with a node.

Method Summary

Modifier and Type	Method	Description
int	accept(IIntVisitor vis)	Accepts a IIntVisitor visitor with user return data.
void	accept(IVoidVisitor vis)	Accepts a IVoidVisitor visitor} visitor with user return data.
void	addNode(INode n)	Adds a node to the NodeOptional.
boolean	present()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

node

public INode node

The node (if null there is no node)

Constructor Details

NodeOptional

public NodeOptional()

Initializes an empty NodeOptional.

NodeOptional

public NodeOptional(INode n)

Initializes a NodeOptional with a node.

Parameters:

n - - the node

Method Details

addNode

public void addNode(INode n)

Adds a node to the NodeOptional.

Parameters:

n - - the node to add

present

public boolean present()

Returns:

true if the node exists, false otherwise

accept

public int accept(IIntVisitor vis)

Accepts a IIntVisitor visitor with user return data.

Specified by:

accept in interface INode

Parameters:

vis - - the visitor

Returns:

the user Return data

accept

public void accept(IVoidVisitor vis)

Accepts a IVoidVisitor visitor} visitor with user return data.

Specified by:

accept in interface INode

Parameters:

vis - - the visitor