The safe singleton in C++

singleton.hpp

class Singleton {
 public:

  static Singleton& get() {
    static Singleton instance;
    return instance;
  }

  Singleton(Singleton&&) = delete;
  Singleton& operator=(Singleton&&) = delete;
  Singleton(const Singleton&)       = delete;
  void operator=(const Singleton&) = delete;

 private:
  Singleton() {}
  ~Singleton() {}
};