[ublas] Proposed change: use BOOST_TYPEOF

Subject: [ublas] Proposed change: use BOOST_TYPEOF
From: Neal Becker (ndbecker2_at_[hidden])
Date: 2009-10-09 08:59:51

Since we have BOOST_TYPEOF, use it in type_traits.hpp:

    template<class X, class Y>
    struct promote_traits {
        typedef type_deduction_detail::base_result_of<X, Y> base_type;
        static typename base_type::x_type x;
        static typename base_type::y_type y;
//         static const std::size_t size = sizeof (
//                 type_deduction_detail::test<
//                     typename base_type::x_type
//                   , typename base_type::y_type
//                 >(x + y)     // Use x+y to stand of all the arithmetic 
actions
//             );

//         static const std::size_t index = (size / sizeof (char)) - 1;
//         typedef typename mpl::at_c<
//             typename base_type::types, index>::type id;
      //        typedef typename id::type promote_type;
      //      typedef typeof (X() + Y()) promote_type;
      typedef BOOST_TYPEOF (X() + Y()) promote_type;
    };