#include <vector>
#include <iostream>


using namespace std;

class  Security
{
	protected:
		enum { BASEID = 0};
	public:
		virtual ~Security() {};
		virtual bool isA(int id) {return (id == BASEID);}
};

class Stock : public Security
{
	typedef Security Super;
	protected:
	enum {OFFECT = 1,TYPEID = BASEID+OFFECT};
	public:
	bool isA(int id)
	{
		return id == TYPEID || Super::isA(id);
	}

	static Stock *dynacast(Security *s)
	{
		return (s->isA(TYPEID))? static_cast<Stock *>(s):0;
	}
};

class Bond : public Security
{
	typedef Security Super;
	protected:
	enum {OFFECT = 2,TYPEID = BASEID+OFFECT};
	public:
	bool isA(int id)
	{
		return id == TYPEID || Super::isA(id);
	}

	static Bond *dynacast(Security *s)
	{
		return (s->isA(TYPEID))? static_cast<Bond *>(s):0;
	}
};

class Investment : public Security
{
	typedef Security Super;
	protected:
	enum {OFFECT = 3,TYPEID = BASEID+OFFECT};
	public:
	bool isA(int id)
	{
		return id == TYPEID || Super::isA(id);
	}

	static Investment *dynacast(Security *s)
	{
		return (s->isA(TYPEID))? static_cast<Investment *>(s):0;
	}

	void special()
	{
		cout<<"special Investment function"<<endl;
	}
};

class Metal : public Investment
{
	typedef Security Super;
	protected:
	enum {OFFECT = 4,TYPEID = BASEID+OFFECT};
	public:
	bool isA(int id)
	{
		return id == TYPEID || Super::isA(id);
	}

	static Metal *dynacast(Security *s)
	{
		return (s->isA(TYPEID))? static_cast<Metal *>(s):0;
	}
};

int main(int argc,char *argv[])
{
	vector<Security *> portfolio;

	portfolio.push_back(new Metal);
	portfolio.push_back(new Investment);
	portfolio.push_back(new Bond);
	portfolio.push_back(new Stock);

	for(vector<Security*>::iterator it = portfolio.begin();it !=portfolio.end();++it)
	{
//		Investment *cm = Investment::dynacast(*it);
		Investment *cm = dynamic_cast<Investment *>(*it);
		if(cm)
			cm->special();
		else
			cout<<"not an Investment"<<endl;
	}

	Security *sp = new Metal;
	Investment *cp = Investment::dynacast(sp);
	if(cp)
		cout<<"it's an Investment"<<endl;

	Metal *mp = Metal::dynacast(sp);
	if(mp)
		cout<<"it's a Metal too!"<<endl;

}