#include <boost/preprocessor/repetition/repeat.hpp>

#define DECL(z, n, data) \
struct S##data##_##n\
{\
	template<typename T>\
	static T back(T && t)\
	{\
		return t;\
	}\
\
	template<typename T, typename ...U, typename Impl = S##data##_##n>\
	static auto back(T && t, U &&... u)\
		-> decltype(Impl::back(static_cast<U &&>(u)...))\
	{\
		return Impl::back(static_cast<U &&>(u)...);\
	}\
};\

#define INNER(z, n, data) BOOST_PP_REPEAT(z, DECL, n)
BOOST_PP_REPEAT(256, INNER, "dontcare")

int main()
{
#define USE(z, n, data) int i##data##_##n = S##data##_##n::back(1,2,3);
#define INNER_USE(z, n, data) BOOST_PP_REPEAT(z, USE, n)
BOOST_PP_REPEAT(256, INNER_USE, "dontcare")
}