Answer by Yuriy for How do you implement the Singleton design pattern?

I did not find a CRTP implementation among the answers, so here it is:

template<typename HeirT>class Singleton{public:    Singleton() = delete;    Singleton(const Singleton &) = delete;    Singleton &operator=(const Singleton &) = delete;    static HeirT &instance()    {        static HeirT instance;        return instance;    }};

To use just inherit your class from this, like: class Test : public Singleton<Test>