How would you implement the Singleton pattern in your code?

The Singleton pattern guarantees that a class has only one instance and provides a global point of access to it. In C++, one common way to implement this is by using a static method with a local static object, which ensures lazy initialization and thread safety starting from C++11:

class Singleton {
public:
    static Singleton& getInstance() {
        static Singleton instance; // created on first call
        return instance;
    }

    // delete copy and assignment
    Singleton(const Singleton&) = delete;
    Singleton& operator=(const Singleton&) = delete;

private:
    Singleton() {} // private constructor
};

// Usage:
// Singleton& s = Singleton::getInstance();

This approach is simple and effective, requires no additional synchronization, and guarantees the uniqueness of the object.