/************************************************************* file: SyntaxTreeNode.h* date: 2006-04-12* author: wuzuyang* describe: none; SyntaxTreeNode*************************************************************/#include <stdio.h>#include "common.h"class SyntaxTreeNode{private:	TokenType type;	int value;	// identifiers will be given distinguish values.	SyntaxTreeNode *left, *right, *child3;	public:	SyntaxTreeNode();	SyntaxTreeNode(TokenType t, int val);	~SyntaxTreeNode();		void setType(TokenType t);	void setValue(int val);		TokenType getType();	int getValue();		void addLeft(TokenType t, int val);	// add the subtree n to this tree's left	void addLeft(SyntaxTreeNode *n);		void addRight(TokenType t, int val);	// add the subtree n to this tree's right	void addRight(SyntaxTreeNode *n);		void addChild3(TokenType t, int val);	// add the subtree n to this tree's child3	void addChild3(SyntaxTreeNode *n);		SyntaxTreeNode* getRootNode();		SyntaxTreeNode* getLeft();	SyntaxTreeNode* getRight();	SyntaxTreeNode* getChild3();		friend class SyntaxTree;};