Understanding, Using, and Improving std::generator

Generators are one of the most common uses of C++20 coroutines and the only one directly supported in the standard library (since C++23). In this talk, we will explore the interface and potential applications of std::generator, as well as its performance on current compilers.

We will also explain why, in many cases, you should not use std::generator as-is. Instead, we will show how you can customize its behavior by starting with the source code. Key topics include adding an arbitrary payload to generators alongside the yielded values, and using caching techniques to mitigate performance penalties when working with generators.