coroutines_example.cpp

// contrived example
task<int> fun_with_coroutines() {
        auto fd = co_await async_open("/tmp/file.txt", O_RDONLY);

        if (-1 == fd) {
                co_return - 1;
        }

        char buf[16];

        if (const auto res = co_await async_read(fd, buf, sizeof(buf)); res != sizeof(buf)) {
                close(fd);
                co_return - 1;
        }

        close(fd);

        try {
                co_await transmit_junk(co_await async_connect("localhost:5121"), buf, sizeof(buf));
        } catch (...) {
                co_return - 1;
        }

        return 0;
}