is_detected可以使用哪些类型的模板？

template <typename T>
using detect_member_type = typename T::member_type;

template <typename T>
using detect_member_function = decltype(std::declval<T>().member_function());

template <typename T>
using detect_function_template = decltype(function_template(std::declval<T>()));

template <typename T>
using has_member_type = is_detected<detect_member_type, T>;

template <typename T>
using has_member_function = is_detected<detect_member_function, T>;

template <typename T>
using has_function_template = is_detected<detect_function_template, T>;