Function parser

Source/external/json.hpp:19306–19315

	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;