#include
#include
#include
#include
#include
#include
template>
class Queue	//無界隊(duì)列
{
public:
	Queue() = default;
	~Queue() = default;
	//禁止拷貝和移動，編譯器會自動delete
	/*Queue(const Queue&) = delete;
	Queue(Queue&&) = delete;
	Queue& operator=(const Queue&) = delete;
	Queue& operator=(Queue&&) = delete;*/
	void push(const T& val)
	{
		emplace(val);
	}
	void push(T&& val)
	{
		emplace(std::move(val));
	}
	template
	void emplace(Args&&...args)
	{
		std::lock_guard lk{ mtx_ };
		q_.push(std::forward(args)...);
		cv_.notify_one();
	}
	T pop()//阻塞
	{
		std::unique_lock lk{ mtx_ };
		cv_.wait(lk, [this] {return !q_.empty(); });//如果隊(duì)列不為空就繼續(xù)執(zhí)行，否則阻塞
		assert(!q_.empty());
		T ret{ std::move_if_noexcept(q_.front()) };
		q_.pop();
		return ret;
	}
	std::optional try_pop()//非阻塞
	{
		std::unique_lock lk{ mtx_ };
		if (q_.empty())return {};
		std::optional ret{ std::move_if_noexcept(q_.front()) };
		q_.pop();
		return ret;
	}
	bool empty()const
	{
		std::lock_guard lk{ mtx_ };
		return q_.empty();
	}
private:
	Container q_;
	mutable std::mutex mtx_;
	std::condition_variable cv_;
};
#include
int main()
{
	Queueq;
	std::thread t1(
		[&] {
			for (int i = 0; i < 100; ++i)
			{
				q.push(i);
			}
		});
	std::thread t2(
		[&] {
			for (int i = 0; i < 100; ++i)
			{
				//std::cout<