#ifndef _SYMBOL_TABLE_H
#define _SYMBOL_TABLE_H

#include <string>
#include <iostream>
#include <map>
#include "gpl_type.h"
class Symbol_table;
#include "expression.h"
using namespace std;

typedef union {
	long t_int;
	double t_double;
	string *t_string;
} Gpl_value;

class Symbol {
	public:
	string *name;
	int type;
	Gpl_value value;
	void print(ostream &target);
};

class Symbol_table {
	public:
	static Symbol_table *m_instance;
	map<string,Symbol> contents;
	void add_symbol(string *name, int type, Expression *init);
        long as_int(string *name);
        double as_float(string *name);
        int type(string *name);
        string *as_string(string *name);
	void del_symbol(string *name);
	bool has_symbol(string *name) {
		return contents.count(*name) != 0;
	};
	void print(ostream &target);
	static Symbol_table *instance();
	Symbol_table() {};
};

#endif