AMDG Larry Evans wrote:
This "optimization" was ineffective. There were 303 instantiations vs. the 297 in the original version :( .
Changing equal to is_same (and making adjustments to where ::type is placed) resulted in just 185 instantiations!
If you really must optimize this to death... #include <boost/mpl/next.hpp> #include <boost/mpl/deref.hpp> #include <boost/mpl/begin.hpp> #include <boost/mpl/end.hpp> #include <boost/mpl/and.hpp> /* Calculate the mpl::and_ of a sequence of nullary logical metafunctions.*/ template<class Begin, class End> struct and_iter : boost::mpl::and_< typename boost::mpl::deref<Begin>::type, and_iter<typename boost::mpl::next<Begin>::type, End>
{};
template<class End> struct and_iter<End, End> : boost::mpl::false_ {}; template <typename Seq> struct and_seq : and_iter<typename boost::mpl::begin<Seq>::type, typename boost::mpl::end<Seq>::type> {}; #include <and_seq_instances.hpp> In Christ, Steven Watanabe