ideas for fix parsing/serializing

fix.cpp

// http://ldionne.com/hana-cppnow-2015/
// http://boostorg.github.io/hana/
// note: re-read the CppCon pres on fusion for parsing

// somehow hold the tag and value type in the field's type?
template <int Tag, typename T>
struct Field { T value; }

template <int Tag, typename T>
constexpr auto get_tag(field<Tag, T>&&) { return Tag; }

// could read ASCII in to struct then pass struct around / serialize bin out
struct Msg {
  BOOST_HANA_DEFINE_STRUCT(Msg,
    (Field<35, int>, ordType),
    (Field<55, std::string>, symbol)
  );
};

// ascii to tuple<Field<>...> using spirit
// Msg(tuple<Field<>...> t) : ordType{get<Field<35, int>>(t)}, // ...
// use some typedefs to make it more readable

auto serialize = [](std::ostream& os, auto const& object) {
  hana::for_each(hana::members(object), [&](auto member) {
    os << get_tag(member) << '=' << member.value << std::endl;
  });
};