syntaxtreenode.cpp

一个上课很好用的课件

#include "SyntaxTreeNode.h"
SyntaxTreeNode::SyntaxTreeNode(){
    type = ERROR;
    value = 0;
    left = right = child3 = NULL;
}
SyntaxTreeNode::SyntaxTreeNode(TokenType t, int val){
    type = t;
    value = val;
    left = right = child3 = NULL;
}
SyntaxTreeNode::~SyntaxTreeNode(){
	if(left != NULL){
		delete left;
	}
	if(right != NULL){
		delete right;
	}
	if(child3 != NULL){
		delete child3;
	}
}
/*===================================================================*/
void SyntaxTreeNode::setType(TokenType t){
	type = t;
}
TokenType SyntaxTreeNode::getType(){
	return type;
}
void SyntaxTreeNode::setValue(int val){
	value = val;
}
int SyntaxTreeNode::getValue(){
	return value;
}
void SyntaxTreeNode::addLeft(TokenType t, int val){
	left = new SyntaxTreeNode(t, val);
}
void SyntaxTreeNode::addLeft(SyntaxTreeNode *n){
	left = n;
}
void SyntaxTreeNode::addRight(TokenType t, int val){
	right = new SyntaxTreeNode(t, val);
}
void SyntaxTreeNode::addRight(SyntaxTreeNode *n){
	right = n;
}
void SyntaxTreeNode::addChild3(TokenType t, int val){
	child3 = new SyntaxTreeNode(t, val);
}
void SyntaxTreeNode::addChild3(SyntaxTreeNode *n){
	child3 = n;
}
SyntaxTreeNode* SyntaxTreeNode::getLeft(){
	return left;
}
SyntaxTreeNode* SyntaxTreeNode::getRight(){
	return right;
}
SyntaxTreeNode* SyntaxTreeNode::getChild3(){
	return child3;
}