// boost.cp
#include <iostream>
#include <list>

#define BOOST_NMEMBER_TEMPLATES
#include "smart_ptr.h"

namespace boost
{
template<class T>
bool	operator<(boost::shared_ptr<T> lhs, boost::shared_ptr<T> rhs)
{
	return *lhs < *rhs;
}
}

typedef	int ExpensiveToCopyObject;
typedef boost::shared_ptr<ExpensiveToCopyObject>	ObjectPtr;

int main()
{
	ObjectPtr	one(new int(1));
	ObjectPtr	two(new int(2));
	ObjectPtr	three(new int(3));
	ObjectPtr	four(new int(4));

	{
		std::list<ObjectPtr>	l;
		l.push_back(two);
		l.push_back(four);
		l.push_back(three);
		l.push_back(one);

		l.sort();
		std::list<ObjectPtr>::iterator iter;
		for (iter = l.begin(); iter != l.end(); ++iter)
		{
			std::cout << *(*iter) << ' ';
		}
	}	// line 1
}		// line 2

// 1 2 3 4