An article very complete!
by Lewis Baker
From the article:
In the previous post on Coroutine Theory I described the high-level differences between functions and coroutines but without going into any detail on syntax and semantics of coroutines as described by the C++ Coroutines TS (N4680).
The key new facility that the Coroutines TS adds to the C++ language is the ability to suspend a coroutine, allowing it to be later resumed. The mechanism the TS provides for doing this is via the new co_await operator.
Understanding how the co_await operator works can help to demystify the behaviour of coroutines and how they are suspended and resumed. In this post I will be explaining the mechanics of the co_await operator and introduce the related Awaitable and Awaiter type concepts.
But before I dive into co_await I want to give a brief overview of the Coroutines TS to provide some context...