#namespace std {
class inplace_stop_source {
public:
constexpr inplace_stop_source() noexcept;
inplace_stop_source(inplace_stop_source&&) = delete;
inplace_stop_source(const inplace_stop_source&) = delete;
inplace_stop_source& operator=(inplace_stop_source&&) = delete;
inplace_stop_source& operator=(const inplace_stop_source&) = delete;
~inplace_stop_source();
constexpr inplace_stop_token get_token() const noexcept;
static constexpr bool stop_possible() noexcept { return true; }
bool stop_requested() const noexcept;
bool request_stop() noexcept;
};
}