144         struct cursor  struct
147             using IsConst = meta::bool_<IsConst_>;
150             using constify_if = meta::const_if_c<IsConst_, T>;
151             using difference_type =
154             constify_if<cartesian_product_view> * view_;
155             std::tuple<iterator_t<constify_if<Views>>...> its_;
157             void next_(meta::size_t<1>)  in next_()
166             void next_(meta::size_t<N>)  in next_()
178             void prev_(meta::size_t<0>)  in prev_()
183             void prev_(meta::size_t<N>)  in prev_()
197             bool equal_(cursor const &, meta::size_t<0>) const  in equal_()
202             bool equal_(cursor const & that, meta::size_t<N>) const  in equal_()
207             difference_type distance_(cursor const & that, meta::size_t<1>) const  in distance_()
212             difference_type distance_(cursor const & that, meta::size_t<N>) const  in distance_()
219             void advance_(meta::size_t<0>, difference_type)  in advance_()
226             void advance_(meta::size_t<N>, difference_type n)  in advance_()
275             void check_at_end_(meta::size_t<1>, bool at_end = false)  in check_at_end_()
282             void check_at_end_(meta::size_t<N>, bool at_end = false)  in check_at_end_()
289             cursor(end_tag, constify_if<cartesian_product_view> * view,  in cursor()  function
297             cursor(end_tag, constify_if<cartesian_product_view> * view,  in cursor()  argument
308             using value_type = std::tuple<range_value_t<Views>...>;
311             explicit cursor(begin_tag, constify_if<cartesian_product_view> * view)  in cursor()  function
319             explicit cursor(end_tag, constify_if<cartesian_product_view> * view)  in cursor()  argument
328             cursor(cursor<Other> that)  in cursor()  function
336             void next()  in next()
340             bool equal(default_sentinel_t) const  in equal()
344             bool equal(cursor const & that) const  in equal()
349             auto prev() -> CPP_ret(void)(  in prev()
356             auto CPP_fun(distance_to)(cursor const & that)(  in CPP_fun()
362             auto advance(difference_type n) //  in advance()