Introduction to Coroutines
This lesson gives an overview of coroutines, predicted to be introduced in C++20.
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Coroutines are functions that can suspend and resume their execution while keeping their state. The evolution of functions goes one step further in C++20.
What I present in this section as a new idea in C++20 is actually quite old. The term coroutine was coined by Melvin Conway; He used it in his publication on compiler construction in 1963. Likewise, Donald Knuth called procedures a special case of coroutines. Sometimes, it just takes a while to get your ideas accepted.
With the new keywords co_await and co_yield, C++20 will extend the execution of a C++ function with two new concepts.
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