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JavaCC is a parser/scanner generator for Java.

There is a newer version: 7.0.13

\#ifndef NODE_H
\#define NODE_H

\#include 
\#include "JavaCC.h"
\#include "Token.h"

#if NAMESPACE
namespace ${NAMESPACE_OPEN}
#fi

/* All AST nodes must implement this interface.  It provides basic
   machinery for constructing the parent and child relationships
   between nodes. */

class ${PARSER_NAME};
#if VISITOR
class ${PARSER_NAME}Visitor;
#fi
class Node {

  /** This method is called after the node has been made the current
    node.  It indicates that child nodes can now be added to it. */
  public: virtual void jjtOpen() const = 0;

  /** This method is called after all the child nodes have been
    added. */
  public: virtual void jjtClose() const = 0;

  /** This pair of methods are used to inform the node of its
    parent. */
  public: virtual void jjtSetParent(Node *n) = 0;
  public: virtual Node *jjtGetParent() const = 0;

  /** This method tells the node to add its argument to the node's
    list of children.  */
  public: virtual void jjtAddChild(Node *n, int i) = 0;

  /** This method returns a child node.  The children are numbered
     from zero, left to right. */
  public: virtual Node *jjtGetChild(int i) const = 0;

  /** Return the number of children the node has. */
  public: virtual int jjtGetNumChildren() const = 0;
  public: virtual int getId() const = 0;
#if VISITOR

  /** Accept the visitor. **/
  public: virtual ${VISITOR_RETURN_TYPE:-void} jjtAccept(${PARSER_NAME}Visitor *visitor, ${VISITOR_DATA_TYPE:-void *} data) const = 0;
#fi
  public: virtual ~Node() { }
};

#if NODE_FACTORY
  class ${NODE_FACTORY};
  extern ${NODE_FACTORY} *nodeFactory;
  // Takes ownerhip of the factory
  void setNodeFactory(${NODE_FACTORY} *factory); 
  ${NODE_FACTORY} *getNodeFactory(); 
#fi

#if NAMESPACE
${NAMESPACE_CLOSE}
#fi
\#endif