Method enqueue

source/src/tools/threadpool.h:50–61

	}
	template<class Fn, class... Args>
	std::future<std::invoke_result_t<Fn, Args...>> enqueue(Fn&& fn, Args&&... args)
	{
		if (stop) throw std::runtime_error("ThreadPool::enqueue: this thread-pool is stopped");
		auto task = std::make_shared<std::packaged_task<std::invoke_result_t<Fn, Args...>()>>(std::bind(std::forward<Fn>(fn), std::forward<Args>(args)...));
		std::future<std::invoke_result_t<Fn, Args...>> result = task->get_future();
		{
			std::unique_lock<std::mutex> lock(mutex);
			queue.emplace([task] { (*task)(); });
		}
		condition.notify_one();
		return result;
	}
	bool stopped() const
	{
		return stop;