[Boost-users] [Boost.MPL]is it possible to generate types with all combinations of template arguments?

I have a templated class template class S { //... implementations }; and some stock type implementations for type U, V and W: typedef boost::mpl::vector u_types; typedef boost::mpl::vector u_types; typedef boost::mpl::vector w_types; I want to test class S with all possible combinations of the template arguments, typedef boost::mpl::vector< S, S, // ... S, > s_types; like this: boost::mpl::for_each(test_func). The only problem is there are 2*5*5 = 50 combinations that I do not wish to type in one by one. Is there a way to generate all the combinations with boost::mpl or Boost.Preprocessor? thanks.