Reset the cancellation state associated with the coroutine.

template<
    typename InFilter,
    typename OutFilter>
void reset_cancellation_state(
    InFilter && in_filter,
    OutFilter && out_filter) const;

Let P be the cancellation slot associated with the current coroutine's spawn completion handler. Assigns a new cancellation_state object S, constructed as S(P, std::forward<InFilter>(in_filter), std::forward<OutFilter>(out_filter)), into the current coroutine's cancellation state object.