146 if constexpr (std::is_base_of_v<std::string,
147 std::remove_reference_t<decltype(parm)>>) {
148 return std::forward<T>(parm);
152 }
else if constexpr (std::is_array_v<
153 std::remove_reference_t<decltype(parm)>>) {
154 return std::forward<T>(parm);
158 }
else if constexpr (std::is_same_v<std::remove_reference_t<decltype(parm)>,
160 std::is_same_v<std::remove_reference_t<decltype(parm)>,
162 return std::forward<T>(parm);
166 }
else if constexpr (std::is_integral_v<std::remove_reference_t<decltype(parm)>> ||
167 std::is_floating_point_v<
168 std::remove_reference_t<decltype(parm)>>) {
174 static_assert(std::is_base_of_v<
void, decltype(parm)>);
175 return std::string();