namespace cm {
-template <typename T, typename O,
- cm::enable_if_t<
- std::is_pointer<cm::invoke_result_t<decltype(&O::get), O>>::value,
- int> = 0>
+template <
+ typename T, typename O,
+ cm::enable_if_t<std::is_pointer<decltype(std::declval<O>().get())>::value,
+ int> = 0>
T& static_reference_cast(O& item)
{
return *(static_cast<T*>(item.get()));
}
-template <typename T, typename O,
- cm::enable_if_t<
- std::is_pointer<cm::invoke_result_t<decltype(&O::get), O>>::value,
- int> = 0>
+
+template <
+ typename T, typename O,
+ cm::enable_if_t<std::is_pointer<decltype(std::declval<O>().get())>::value,
+ int> = 0>
T& dynamic_reference_cast(O& item)
{
auto p = dynamic_cast<T*>(item.get());