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.

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