C++ `std::variant` and `std::visit` for Type-Safe Data Structures

Writing robust C++ often requires handling values that can be one of several distinct types, but traditional unions are notoriously type-unsafe and error-prone. This course provides a clear, practical guide to using `std::variant`, the C++17 solution for type-safe discriminated unions. You will learn how to define flexible data structures and process them safely using modern visitation patterns. What you'll learn: * Understand the limitations of traditional C unions and why `std::variant` provides essential type safety. * Configure and initialize `std::variant` objects using direct construction, `std::monostate`, and in-place methods. * Apply `std::visit` with lambda functions and function objects to safely process the active type of a variant. * Practice handling potential runtime errors like `std::bad_variant_access` and managing empty states. * Compare `std::variant` usage against related modern utilities like `std::optional` for contextual data modeling. * Master advanced techniques for recursive variants and custom visitor implementations. The course begins with foundational definitions and setup before moving into practical examples of construction, assignment, and advanced visitation techniques. We reinforce concepts through written explanations and code analysis. This course is designed for beginner to intermediate C++ developers who want to adopt modern C++17 features for building safer and more expressive data structures. No prior experience with C++ unions or advanced metaprogramming is required. Start writing safer, more idiomatic C++ code today.