38         std::unique_lock lk(this->m_mtx);  in wait()
39         wait_(lk);  in wait()
45         std::unique_lock<mutex> lk(m_mtx);  in wait_for()
46 …return m_cv.wait_for(lk, waitTime, [this] { return get_derived().has_value(); }) ? future_status::…  in wait_for()
53         std::unique_lock<mutex> lk(m_mtx);  in wait_until()
54 …return m_cv.wait_until(lk, tp, [this] { return get_derived().has_value(); }) ? future_status::read…  in wait_until()
59     void wait_(std::unique_lock<mutex>& lk) const noexcept  in wait_()
61         m_cv.wait(lk, [this] { return get_derived().has_value(); });  in wait_()
79             std::unique_lock<mutex> lk(this->m_mtx);  in set_value()
88             std::unique_lock<mutex> lk(this->m_mtx);  in set_value()
96         std::unique_lock lk(this->m_mtx);  in get()
97         this->wait_(lk);  in get()
115             std::unique_lock<mutex> lk(this->m_mtx);
123         std::unique_lock lk(this->m_mtx);
124         this->wait_(lk);