So many possibilities!

C++ coroutines: Getting started with awaitable objects

by Raymond Chen

From the article:

Coroutines were added to C++20, and Lewis Baker has a nice introduction to them.

• Coroutine theory.
• Understanding operator co_await.
• Understanding the promise type.

But I’m going to write another one, taking a more practical approach: The least you need to know to accomplish various coroutine tasks...