Hi,

Why 'type' is not same as 'expected' in the example below?

using origin = boost::fusion::map<
    boost::fusion::pair<int, int>
>;
using expected = boost::fusion::map<
     boost::fusion::pair<int, int>
    ,boost::fusion::pair<char, char>
>;

using type = boost::fusion::result_of::push_back<
     origin
    ,boost::fusion::pair<char, char>
>::type;

static_assert(std::is_same<expected, type>::value, "error!");


The second question is, how can I get the same type as 'expected' when
using 'result_of::push_back<>::type' ?