std::variant

Imagine you're working on a system that needs to handle various types of user input—some are integers, others are strings, and maybe some are custom objects. Traditionally, you might resort to using a union or polymorphism, but these approaches can introduce their own set of challenges. Here’s where std::variant shines.

It allows you to define a type-safe union, giving you a way to manage multiple types without the pitfalls of manually tracking which type you're currently using.