Registry.hh

#ifndef Registry_hh
#define Registry_hh

#include "Utils.hh"

using namespace std;

class Player;

/**
 * Since the main program does not know how much players will be inherited
 * from the Player class, we use a registration and factory pattern.
 * Quite magic for beginners.
 */

class Registry {

public:

	typedef Player* (*Factory)();

	static int Register(const char* name, Factory fact);

	static Player* new_player(string name);

	static void print_players(ostream& os);
};

#define stringification(s) #s
#define RegisterPlayer(x) static int registration = Registry::Register(stringification(x), x::factory)

#endif