Package EDU.purdue.jtb.parser.syntaxtree

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:

  • 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