Functional programming offers a more declarative way to write code — one that can make programs easier to reason about, compose, and maintain. But thinking functionally in C++ means seeing the language differently. Jonathan will show how modern C++ supports functional ideas through std::ranges, composable error handling with std::optional and std::expected, and algebraic data types like std::tuple and std::variant. He’ll even go as far as explaining the M-word — be there for it!

C++ today provides powerful tools for safety and clarity—ranges, value semantics, concepts, strong types, constexpr — yet unsafe and outdated code is still everywhere. Why? Klaus takes an honest look at what really goes wrong in the C++ world: the knowledge gap between experts and everyday developers, the fascination with dangerous details, and the lagging state of C++ education. This talk is less about language features and more about the mindset that defines how we use them.