namespace boost {
	namespace lambda {
		template <int I> struct placeholder;
		template <class Base> class lambda_functor;
		template<> struct placeholder<1> {};
		typedef const lambda_functor< placeholder<1> > placeholder1_type;
		template <class T> class lambda_functor : public T {
			public:
				typedef T inherited;
				lambda_functor() { }
		};
		boost::lambda::placeholder1_type free1;
		boost::lambda::placeholder1_type& _1 = free1;
		using boost::lambda::_1;
	};
};