#include <exception>
#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("");
    }
  }

  scoped_thread(const scoped_thread&) = delete;
  scoped_thread& operator=(const scoped_thread&) = delete;

  ~scoped_thread() { _t.join(); }
};

void foo() {}

int main() {
  scoped_thread t(std::thread(foo));
  return 0;
}