Summary: Essential Utilities

A summary of what we discussed in the “Essential Utilities” chapter.

In this chapter, you have learned how to use std::optional to represent optional values in your code. You have also seen how to combine std::pair, std::tuple, std::any, and std::variant with standard containers and metaprogramming to store and iterate over elements of different types. You also learned that std::tie() is a conceptually simple yet powerful tool that can be used for projection and reflection.

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