Creational Design Patterns in Modern C++ - Registry of Singletons - II

The video tutorial explains how to implement lazy instantiation for singletons using callbacks and shared pointers. It covers the transition from eager to lazy instantiation, the use of shared pointers for memory management, and the process of registering and retrieving printer instances. The tutorial also discusses modifying local printers to use shared pointers and tests the implementation. An alternative approach using the Meyers Singleton is briefly explored.

What is lazy instantiation and why is it preferred for singletons in this context?

Explain the role of the callback function in the printer provider implementation.

How does the use of shared pointers improve memory management in this implementation?

What changes were made to the registration process of printers in the new implementation?

Why is it important to register the creator function before invoking the get printer function?

What are the implications of using a static instance in the context of memory management?

Describe the difference between the old implementation and the new lazy instantiation approach.