Node.h

#ifndef NODE_H
#define	NODE_H

#include <list>
#include <iostream>
#include <fstream>
#include <vector>
#include <unistd.h>
#include <sys/wait.h>

using namespace std;


class Node {
public:
	int id, lineno;
	string type, value;
	list<Node*> children;
	Node(string t, string v, int l) : type(t), value(v), lineno(l){}
	Node()
	{
		type = "uninitialised";
		value = "uninitialised"; }   // Bison needs this.
  
	void print_tree(int depth=0) {
		for(int i=0; i<depth; i++)
		cout << "  ";
		cout << type << ":" << value << endl; //<< " @line: "<< lineno << endl;
		for(auto i=children.begin(); i!=children.end(); i++)
		(*i)->print_tree(depth+1);
	}
  
	void generate_tree() {
		std::ofstream outStream;
		char* filename = "tree.dot";
	  	outStream.open(filename);

		int count = 0;
		outStream << "digraph {" << std::endl;
		generate_tree_content(count, &outStream);
		outStream << "}" << std::endl;
		outStream.close();

		printf("\nBuilt a parse-tree at %s. Use 'make tree' to generate the pdf version.\n", filename);
  	}

  	void generate_tree_content(int &count, ofstream *outStream) {
	  id = count++;
	  *outStream << "n" << id << " [label=\"" << type << ":" << value << "\"];" << endl;

	  for (auto i = children.begin(); i != children.end(); i++)
	  {
		  (*i)->generate_tree_content(count, outStream);
		  *outStream << "n" << id << " -> n" << (*i)->id << endl;
	  }
  }

};

#endif