Summary
This episode answers viewer questions about the practical applications of inheriting from lambdas, a technique previously demonstrated in episodes 40 and 48. Jason shows how lambda inheritance can be used to elegantly implement the visitor pattern for std::variant types. By creating a single callable object that inherits from multiple lambda expressions, each handling a different variant alternative, developers can craft concise visitors that process heterogeneous collections. The episode demonstrates this with a practical example of summing values from an array of variants containing different numeric types, showcasing how this C++17 technique simplifies type-specific processing.
Related C++ Standard Sections
This episode covers topics found in these sections of the C++ standard:
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[variant]40% match