Introduction

💡 Did you know?
std::variant and std::optional are called “vocabulary” types because you can leverage them to convey more design information.

Your code can be much more compact and more expressive.

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This chapter will show you one example of how std::optional and std::variant can help with the refactoring of one functi​on. We’ll start with some legacy code, and through several steps, we’ll arrive with a much better solution. To give you a better understanding you’ll see the pros and cons of each step.