scoped_thread类

#include<iostream>
#include<thread>

class scoped_thread {
	std::thread t;
public:
	explicit scoped_thread(std::thread _t) : t(std::move(_t)) {
		if (!t.joinable()) {
			throw std::logic_error("No thread");
		}
	}

	~scoped_thread() {
		t.join();
	}
	scoped_thread(scoped_thread const&) = delete;
	scoped_thread& operator=(scoped_thread const&) = delete;

};