class Singleton
{
public:
    static Singleton & Instance()
    {
        // Since it's a static variable, if the class has already been created,
        // It won't be created again.
        // And it **is** thread-safe in C++11.

        static Singleton myInstance;

        // Return a reference to our instance.
        return myInstance;
    }

    // delete copy and move constructors and assign operators
    Singleton(Singleton const&) = delete;             // Copy construct
    Singleton(Singleton&&) = delete;                  // Move construct
    Singleton& operator=(Singleton const&) = delete;  // Copy assign
    Singleton& operator=(Singleton &&) = delete;      // Move assign

    // Any other public methods

protected:
    Singleton()
    {
         // Constructor code goes here.
    }

    ~Singleton()
    {
         // Destructor code goes here.
    }

     // And any other protected methods.
}