Function parser

extern/json/json.hpp:19346–19355

    template<typename InputAdapterType>
    static ::nlohmann::detail::parser<basic_json, InputAdapterType> parser(
        InputAdapterType adapter,
        detail::parser_callback_t<basic_json>cb = nullptr,
        const bool allow_exceptions = true,
        const bool ignore_comments = false
                                 )
    {
        return ::nlohmann::detail::parser<basic_json, InputAdapterType>(std::move(adapter),
                std::move(cb), allow_exceptions, ignore_comments);
    }

  private:
    using primitive_iterator_t = ::nlohmann::detail::primitive_iterator_t;