Class dummy_task

example/6_manual_executor/source/main.cpp:35–39

    });

    struct dummy_task {
        void operator()() const noexcept {
            std::cout << "A dummy task is being executed on thread_id " << std::this_thread::get_id() << std::endl;
        }
    };

    threads.emplace_back([manual_executor] {
        std::vector<dummy_task> tasks(20);