Summary
This final episode of Jason's five-part Christmas class series provides answers to the questions posed in Chapter 5. Jason explains that lambdas leverage numerous C++ features including structs/classes, templates, value/reference semantics, concepts, return type deduction, trailing return types, operator overloading, and function objects. He clarifies that lambda types are unknowable/unnameable outside of auto, confirms that lambda objects follow normal C++ lifetime rules (enabling RAII patterns), and demonstrates how lambdas can improve efficiency through immediately-invoked expressions for const initialization. Finally, he warns about overusing lambdas in templates, which can cause unnecessary code bloat.