#include <utility>

namespace sqlpp
{
  template <char... Cs>
  struct char_sequence
  {
  };
}

template <typename String, typename T>
struct make_string_aux;

template <typename String, std::size_t... Is>
struct make_string_aux<String, std::index_sequence<Is...>>
{
  using type = sqlpp::char_sequence<String::value()[Is]...>;
};

template <typename String, std::size_t length = c_str_length(String::value())>
using make_string =
    typename make_string_aux<String, std::make_index_sequence<length>>::type;

#define MAKE_CHAR_SEQUENCE(name)                  \
  []()                                            \
  {                                               \
    struct _intern                                \
    {                                             \
      static constexpr const char* value()        \
      {                                           \
        return #name;                             \
      }                                           \
    };                                            \
                                                  \
    return make_string<_intern, sizeof(#name)>{}; \
  }()


int main()
{
  auto x = MAKE_CHAR_SEQUENCE(delta);
  static_assert(
      std::is_same<
          decltype(x),
          sqlpp::char_sequence<'d', 'e', 'l', 't', 'a', '\000'>>::value,
      "");
}