Creational Design Patterns in Modern C++ - Lazy Instantiation

The video tutorial explains the concept of singleton instances, focusing on eager and lazy instance creation. It highlights the differences between the two, with eager instances being created at program load and lazy instances only upon method call. The tutorial provides a step-by-step guide to implementing a lazy instance, including necessary code changes and null checks. It also addresses issues with the lazy instance, particularly the lack of destructor invocation, and suggests that solutions will be covered in the next lecture.

What is the main purpose of using a singleton instance in programming?

Explain the difference between eager instance and lazy instance.

What issues can arise from not deleting a singleton instance?

How does a lazy instance ensure that an instance is created only when needed?

What precautions should be taken when deleting a singleton instance?