How do I bridge coroutines with callbacks and futures in C++?

In C++, bridging coroutines with callbacks and futures can be achieved by using the standard library along with coroutine support from C++20. This allows for asynchronous programming where callbacks are executed upon completion of a future, and coroutines provide a clean alternative for managing asynchronous control flow.

Example of Bridging Coroutines with Callbacks and Futures


    #include <iostream>
    #include <future>
    #include <coroutine>
    #include <thread>

    // A simple coroutine that returns a future
    struct MyCoroutine {
        struct promise_type {
            MyCoroutine get_return_object() {
                return {};
            }
            std::suspend_never initial_suspend() { return {}; }
            std::suspend_never final_suspend() noexcept { return {}; }
            void unhandled_exception() {}
            void return_void() {}
        };

        using promise_type = MyCoroutine::promise_type;

        // Simulates some asynchronous operation
        static std::future asyncOperation() {
            return std::async(std::launch::async, [] {
                std::this_thread::sleep_for(std::chrono::seconds(1));
                std::cout << "Asynchronous operation completed" << std::endl;
            });
        }

        static MyCoroutine run() {
            auto future = asyncOperation();
            future.then([](std::future f) {
                f.get();
                std::cout << "Coroutine finally resumed" << std::endl;
            });
            return {};
        }
    };

    int main() {
        MyCoroutine::run();
        std::this_thread::sleep_for(std::chrono::seconds(2)); // wait for the coroutine to finish
        return 0;
    }

coroutines callbacks futures C++20 asynchronous programming promise_type

How do I bridge coroutines with callbacks and futures in C++?

Example of Bridging Coroutines with Callbacks and Futures

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How do I bridge coroutines with callbacks and futures in C++?

Example of Bridging Coroutines with Callbacks and Futures

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