一种迭代可变参数基数的方法：

One way to iterate over the variadic bases:

template <typename T, typename ...Args>
class ChildGenerator : public Args...
{
public:
    ChildGenerator(T t) : Args(t)... {}

    void doThings() override {
        int dummy[] = {0, (Args::doThings(), void(), 0)...};
        static_cast<void>(dummy); // avoid warning for unused variable
    }
};

或在C ++ 17中，带有折叠表达式：

or in C++17, with folding expression:

    void doThings() override {
        (static_cast<void>(Args::doThings()), ...);
    }