Re: [Boost-users] Using an mpl sepquence as a template parameter

Several times I've done something like this: namespace detail { struct none {}; template <typename TSeq> struct strip_none { typedef typename boost::mpl::remove::type type; }; } // namespace detail template < typename T0, typename T1 = detail::none, typename T2 = detail::none, typename T3 = detail::none, typename T4 = detail::none, typename T5 = detail::none, typename T6 = detail::none> class some_class { typedef boost::mpl::vector raw_types; typedef typename detail::strip_none::type types; ... }; Presumably some simple PP magic could make this prettier. -Gabe