Summary
In this episode, Jason Turner introduces the 'Design by Introspection' pattern, which combines C++20's concepts with C++17's if constexpr to create more flexible APIs. This technique allows functions to adapt their behavior based on the capabilities of the types they receive, rather than requiring specific interfaces. Using the example of a function that reports container capacity, Jason demonstrates how to check at compile time if a container has a capacity() method, falling back to size() when unavailable, all without runtime overhead.