requires { typename _ITER_CONCEPT<_Ip>; } &&
derived_from<_ITER_CONCEPT<_Ip>, input_iterator_tag>;
+// [iterator.concept.forward]
+template<class _Ip>
+concept forward_iterator =
+ input_iterator<_Ip> &&
+ derived_from<_ITER_CONCEPT<_Ip>, forward_iterator_tag> &&
+ incrementable<_Ip> &&
+ sentinel_for<_Ip, _Ip>;
+
// clang-format on
#endif // !defined(_LIBCPP_HAS_NO_RANGES)
concept input_range = range<_Tp> && input_iterator<iterator_t<_Tp> >;
template <class _Tp>
+ concept forward_range = input_range<_Tp> && forward_iterator<iterator_t<_Tp> >;
+
+ template <class _Tp>
concept common_range = range<_Tp> && same_as<iterator_t<_Tp>, sentinel_t<_Tp> >;
+
} // namespace ranges
#endif // !defined(_LIBCPP_HAS_NO_RANGES)
template<class I>
concept input_iterator = see below; // since C++20
+// [iterator.concept.forward], concept forward_iterator
+template<class I>
+ concept forward_iterator = see below; // since C++20
+
template<class Category, class T, class Distance = ptrdiff_t,
class Pointer = T*, class Reference = T&>
struct iterator
template<class T>
concept input_range = see below;
+ template<class T>
+ concept forward_range = see below;
+
template <class _Tp>
concept common_range = see below;
}
using const_reverse_iterator = std::map<int, int>::const_reverse_iterator;
using value_type = std::pair<const int, int>;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<const_iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::multimap<int, int>::const_reverse_iterator;
using value_type = std::pair<const int, int>;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<const_iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::multiset<int>::const_reverse_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
+static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sentinel_for<const_iterator, const_reverse_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::set<int>::const_reverse_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
using reverse_iterator = std::array<int, 10>::reverse_iterator;
using const_reverse_iterator = std::array<int, 10>::const_reverse_iterator;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, int>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, int>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::deque<int>::const_reverse_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_iterator = std::forward_list<int>::const_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<const_iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::list<int>::const_reverse_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::vector<bool>::const_reverse_iterator;
using value_type = bool;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_reverse_iterator = std::vector<int>::const_reverse_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_local_iterator = std::unordered_map<int, int>::const_local_iterator;
using value_type = std::pair<const int, int>;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_local_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_iterator>);
-static_assert(std::indirectly_readable<local_iterator>);
+static_assert(std::forward_iterator<local_iterator>);
static_assert(!std::indirectly_writable<local_iterator, value_type>);
-static_assert(std::incrementable<local_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(!std::sentinel_for<local_iterator, iterator>);
static_assert(!std::sentinel_for<local_iterator, const_iterator>);
static_assert(std::sentinel_for<local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<local_iterator>);
-static_assert(std::indirectly_readable<const_local_iterator>);
+static_assert(std::forward_iterator<const_local_iterator>);
static_assert(!std::indirectly_writable<const_local_iterator, value_type>);
-static_assert(std::incrementable<const_local_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(!std::sentinel_for<const_local_iterator, iterator>);
static_assert(!std::sentinel_for<const_local_iterator, const_iterator>);
static_assert(std::sentinel_for<const_local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_local_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_local_iterator = std::unordered_multimap<int, int>::const_local_iterator;
using value_type = std::pair<const int, int>;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_local_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_iterator>);
-static_assert(std::indirectly_readable<local_iterator>);
+static_assert(std::forward_iterator<local_iterator>);
static_assert(!std::indirectly_writable<local_iterator, value_type>);
-static_assert(std::incrementable<local_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(!std::sentinel_for<local_iterator, iterator>);
static_assert(!std::sentinel_for<local_iterator, const_iterator>);
static_assert(std::sentinel_for<local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<local_iterator>);
-static_assert(std::indirectly_readable<const_local_iterator>);
+static_assert(std::forward_iterator<const_local_iterator>);
static_assert(!std::indirectly_writable<const_local_iterator, value_type>);
-static_assert(std::incrementable<const_local_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(!std::sentinel_for<const_local_iterator, iterator>);
static_assert(!std::sentinel_for<const_local_iterator, const_iterator>);
static_assert(std::sentinel_for<const_local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_local_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_local_iterator = std::unordered_multiset<int>::const_local_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_local_iterator>);
-static_assert(std::input_iterator<iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_iterator>);
-static_assert(std::indirectly_readable<local_iterator>);
+static_assert(std::forward_iterator<local_iterator>);
static_assert(!std::indirectly_writable<local_iterator, value_type>);
-static_assert(std::incrementable<local_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(!std::sentinel_for<local_iterator, iterator>);
static_assert(!std::sentinel_for<local_iterator, const_iterator>);
static_assert(std::sentinel_for<local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<local_iterator>);
-static_assert(std::indirectly_readable<const_local_iterator>);
+static_assert(std::forward_iterator<const_local_iterator>);
static_assert(!std::indirectly_writable<const_local_iterator, value_type>);
-static_assert(std::incrementable<const_local_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(!std::sentinel_for<const_local_iterator, iterator>);
static_assert(!std::sentinel_for<const_local_iterator, const_iterator>);
static_assert(std::sentinel_for<const_local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, local_iterator>);
static_assert(!std::sized_sentinel_for<const_local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_local_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using const_local_iterator = std::unordered_set<int>::const_local_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, local_iterator>);
static_assert(!std::sentinel_for<iterator, const_local_iterator>);
-static_assert(std::input_iterator<iterator>);
+static_assert(!std::sized_sentinel_for<iterator, iterator>);
+static_assert(!std::sized_sentinel_for<iterator, const_iterator>);
+static_assert(!std::sized_sentinel_for<iterator, local_iterator>);
+static_assert(!std::sized_sentinel_for<iterator, const_local_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
+static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, local_iterator>);
static_assert(!std::sentinel_for<const_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_iterator>);
+static_assert(!std::sized_sentinel_for<const_iterator, iterator>);
+static_assert(!std::sized_sentinel_for<const_iterator, const_iterator>);
+static_assert(!std::sized_sentinel_for<const_iterator, local_iterator>);
+static_assert(!std::sized_sentinel_for<const_iterator, const_local_iterator>);
-static_assert(std::indirectly_readable<local_iterator>);
-static_assert(std::incrementable<local_iterator>);
-static_assert(std::input_or_output_iterator<local_iterator>);
+static_assert(std::forward_iterator<local_iterator>);
static_assert(!std::sentinel_for<local_iterator, iterator>);
static_assert(!std::sentinel_for<local_iterator, const_iterator>);
static_assert(std::sentinel_for<local_iterator, local_iterator>);
static_assert(std::sentinel_for<local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<local_iterator>);
+static_assert(!std::sized_sentinel_for<local_iterator, iterator>);
+static_assert(!std::sized_sentinel_for<local_iterator, const_iterator>);
+static_assert(!std::sized_sentinel_for<local_iterator, local_iterator>);
+static_assert(!std::sized_sentinel_for<local_iterator, const_local_iterator>);
-static_assert(std::indirectly_readable<const_local_iterator>);
+static_assert(std::forward_iterator<const_local_iterator>);
static_assert(!std::indirectly_writable<const_local_iterator, value_type>);
-static_assert(std::incrementable<const_local_iterator>);
-static_assert(std::input_or_output_iterator<const_local_iterator>);
static_assert(!std::sentinel_for<const_local_iterator, iterator>);
static_assert(!std::sentinel_for<const_local_iterator, const_iterator>);
static_assert(std::sentinel_for<const_local_iterator, local_iterator>);
static_assert(std::sentinel_for<const_local_iterator, const_local_iterator>);
-static_assert(std::input_iterator<const_local_iterator>);
+static_assert(!std::sized_sentinel_for<const_local_iterator, iterator>);
+static_assert(!std::sized_sentinel_for<const_local_iterator, const_iterator>);
+static_assert(!std::sized_sentinel_for<const_local_iterator, local_iterator>);
+static_assert(!std::sized_sentinel_for<const_local_iterator, const_local_iterator>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::const_iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
static_assert(std::same_as<stdr::iterator_t<range>, range::iterator>);
static_assert(stdr::common_range<range>);
-static_assert(stdr::input_range<range>);
+static_assert(stdr::forward_range<range>);
static_assert(std::same_as<stdr::iterator_t<range const>, range::iterator>);
static_assert(stdr::common_range<range const>);
-static_assert(stdr::input_range<range const>);
+static_assert(stdr::forward_range<range const>);
using reverse_iterator = std::span<int>::reverse_iterator;
using value_type = int;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<iterator, iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
-static_assert(std::input_iterator<iterator>);
using value_type = fs::directory_entry;
-static_assert(std::indirectly_readable<fs::directory_iterator>);
+static_assert(std::input_iterator<fs::directory_iterator>);
+static_assert(!std::forward_iterator<fs::directory_iterator>);
static_assert(!std::indirectly_writable<fs::directory_iterator, value_type>);
-static_assert(std::weakly_incrementable<fs::directory_iterator>);
static_assert(!std::incrementable<fs::directory_iterator>);
-static_assert(std::input_or_output_iterator<fs::directory_iterator>);
static_assert(std::sentinel_for<fs::directory_iterator, fs::directory_iterator>);
static_assert(!std::sized_sentinel_for<fs::directory_iterator, fs::directory_iterator>);
-static_assert(std::input_iterator<fs::directory_iterator>);
-static_assert(std::indirectly_readable<fs::recursive_directory_iterator>);
+static_assert(std::input_iterator<fs::recursive_directory_iterator>);
+static_assert(!std::forward_iterator<fs::recursive_directory_iterator>);
static_assert(!std::indirectly_writable<fs::recursive_directory_iterator, value_type>);
-static_assert(std::weakly_incrementable<fs::recursive_directory_iterator>);
static_assert(!std::incrementable<fs::recursive_directory_iterator>);
-static_assert(std::input_or_output_iterator<fs::recursive_directory_iterator>);
static_assert(std::sentinel_for<fs::recursive_directory_iterator, fs::recursive_directory_iterator>);
static_assert(!std::sized_sentinel_for<fs::recursive_directory_iterator, fs::recursive_directory_iterator>);
-static_assert(std::input_iterator<fs::recursive_directory_iterator>);
static_assert(std::same_as<stdr::iterator_t<fs::path>, fs::path::iterator>);
static_assert(stdr::common_range<fs::path>);
-static_assert(stdr::input_range<fs::path>);
+static_assert(stdr::forward_range<fs::path>);
static_assert(std::same_as<stdr::iterator_t<fs::path const>, fs::path::const_iterator>);
static_assert(stdr::common_range<fs::path const>);
-static_assert(stdr::input_range<fs::path const>);
+static_assert(stdr::forward_range<fs::path const>);
--- /dev/null
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: gcc-10
+
+// std::forward_iterator;
+
+#include <iterator>
+
+#include <concepts>
+
+#include "test_iterators.h"
+
+static_assert(!std::forward_iterator<cpp17_input_iterator<int*> >);
+static_assert(!std::forward_iterator<cpp20_input_iterator<int*> >);
+static_assert(std::forward_iterator<forward_iterator<int*> >);
+static_assert(std::forward_iterator<bidirectional_iterator<int*> >);
+static_assert(std::forward_iterator<random_access_iterator<int*> >);
+static_assert(std::forward_iterator<contiguous_iterator<int*> >);
+
+static_assert(std::forward_iterator<int*>);
+static_assert(std::forward_iterator<int const*>);
+static_assert(std::forward_iterator<int volatile*>);
+static_assert(std::forward_iterator<int const volatile*>);
+
+struct not_input_iterator {
+ // using value_type = int;
+ using difference_type = std::ptrdiff_t;
+ using iterator_concept = std::forward_iterator_tag;
+
+ int operator*() const;
+
+ not_input_iterator& operator++();
+ not_input_iterator operator++(int);
+
+ bool operator==(not_input_iterator const&) const = default;
+};
+static_assert(std::input_or_output_iterator<not_input_iterator>);
+static_assert(!std::input_iterator<not_input_iterator>);
+static_assert(!std::forward_iterator<not_input_iterator>);
+
+struct bad_iterator_tag {
+ using value_type = int;
+ using difference_type = std::ptrdiff_t;
+ using iterator_concept = std::input_iterator_tag;
+
+ int operator*() const;
+
+ bad_iterator_tag& operator++();
+ bad_iterator_tag operator++(int);
+
+ bool operator==(bad_iterator_tag const&) const = default;
+};
+static_assert(!std::forward_iterator<bad_iterator_tag>);
+
+struct not_incrementable {
+ using value_type = int;
+ using difference_type = std::ptrdiff_t;
+ using iterator_concept = std::forward_iterator_tag;
+
+ int operator*() const;
+
+ not_incrementable& operator++();
+ void operator++(int);
+
+ bool operator==(not_incrementable const&) const = default;
+};
+static_assert(!std::forward_iterator<not_incrementable>);
+
+struct not_equality_comparable {
+ using value_type = int;
+ using difference_type = std::ptrdiff_t;
+ using iterator_concept = std::forward_iterator_tag;
+
+ int operator*() const;
+
+ not_equality_comparable& operator++();
+ not_equality_comparable operator++(int);
+
+ bool operator==(not_equality_comparable const&) const = delete;
+};
+static_assert(!std::forward_iterator<not_equality_comparable>);
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
-// template<class T>
-// concept input_iterator;
+// std::forward_iterator;
#include <iterator>
#include <concepts>
// clang-format off
-template<std::input_or_output_iterator I>
-requires std::indirectly_readable<I> &&
- std::derived_from<std::_ITER_CONCEPT<I>, std::input_iterator_tag>
+template<std::input_iterator>
[[nodiscard]] constexpr bool check_subsumption() {
return false;
}
-template<std::input_iterator>
+template<std::forward_iterator>
[[nodiscard]] constexpr bool check_subsumption() {
return true;
}
-// Due to the need to check _ITER_CONCEPT, this test is located in `test/libcxx/iterators/iterator.concepts/iterator.concept.input/subsumption.compile.pass.cpp`.
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: gcc-10
+
+// template<class T>
+// concept input_iterator;
+
+#include <iterator>
+
+#include <concepts>
+
+// clang-format off
+template<std::input_or_output_iterator I>
+requires std::indirectly_readable<I>
+[[nodiscard]] constexpr bool check_subsumption() {
+ return false;
+}
+
+template<std::input_iterator>
+[[nodiscard]] constexpr bool check_subsumption() {
+ return true;
+}
+// clang-format on
+
+static_assert(check_subsumption<int*>());
#include <iterator>
using iterator = std::move_iterator<int*>;
-static_assert(std::indirectly_readable<iterator>);
+
+
+static_assert(std::input_iterator<iterator>);
+static_assert(!std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, int>);
static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sized_sentinel_for<iterator, iterator>);
-static_assert(std::input_iterator<iterator>);
#include <iterator>
-using iterator = std::reverse_iterator<int*>;
-
-static_assert(std::indirectly_readable<iterator>);
-static_assert(std::indirectly_writable<iterator, int>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
-static_assert(std::sentinel_for<iterator, iterator>);
-static_assert(std::sized_sentinel_for<iterator, iterator>);
-static_assert(std::input_iterator<iterator>);
-
-using other_iterator = std::reverse_iterator<float*>;
-static_assert(std::sentinel_for<iterator, other_iterator>);
-static_assert(!std::sized_sentinel_for<iterator, other_iterator>);
+#include "test_iterators.h"
+
+template<class I1>
+[[nodiscard]] consteval bool common_reverse_iterator_checks() {
+ static_assert(std::indirectly_writable<I1, int>);
+ static_assert(std::sentinel_for<I1, I1>);
+ static_assert(std::sentinel_for<I1, std::reverse_iterator<float*>>);
+ static_assert(!std::sized_sentinel_for<I1, std::reverse_iterator<float*>>);
+ return true;
+}
+
+using reverse_bidirectional_iterator = std::reverse_iterator<bidirectional_iterator<int*>>;
+static_assert(common_reverse_iterator_checks<reverse_bidirectional_iterator>());
+static_assert(std::forward_iterator<reverse_bidirectional_iterator>);
+static_assert(!std::sized_sentinel_for<reverse_bidirectional_iterator, reverse_bidirectional_iterator>);
+
+using reverse_random_access_iterator = std::reverse_iterator<random_access_iterator<int*>>;
+static_assert(common_reverse_iterator_checks<reverse_random_access_iterator>());
+static_assert(std::forward_iterator<reverse_random_access_iterator>);
+static_assert(std::sized_sentinel_for<reverse_random_access_iterator, reverse_random_access_iterator>);
+
+using reverse_contiguous_iterator = std::reverse_iterator<contiguous_iterator<int*>>;
+static_assert(common_reverse_iterator_checks<reverse_contiguous_iterator>());
+static_assert(std::forward_iterator<reverse_contiguous_iterator>);
+static_assert(std::sized_sentinel_for<reverse_contiguous_iterator, reverse_contiguous_iterator>);
#include <string>
using iterator = std::istreambuf_iterator<char>;
-static_assert(std::indirectly_readable<iterator>);
+
+static_assert(std::input_iterator<iterator>);
+static_assert(!std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, char>);
-static_assert(std::weakly_incrementable<iterator>);
static_assert(!std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(!std::sized_sentinel_for<iterator, iterator>);
-static_assert(std::input_iterator<iterator>);
--- /dev/null
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: gcc-10
+
+// std::ranges::forward_range;
+
+#include <ranges>
+
+#include "test_iterators.h"
+#include "test_range.h"
+
+namespace stdr = std::ranges;
+
+template <template <class...> class I>
+constexpr bool check_forward_range() {
+ constexpr bool result = stdr::forward_range<test_range<I> >;
+ static_assert(stdr::forward_range<test_range<I> const> == result);
+ static_assert(stdr::forward_range<test_non_const_common_range<I> > == result);
+ static_assert(stdr::forward_range<test_non_const_range<I> > == result);
+ static_assert(stdr::forward_range<test_common_range<I> > == result);
+ static_assert(stdr::forward_range<test_common_range<I> const> == result);
+ static_assert(!stdr::forward_range<test_non_const_common_range<I> const>);
+ static_assert(!stdr::forward_range<test_non_const_range<I> const>);
+ return result;
+}
+
+static_assert(!check_forward_range<cpp17_input_iterator>());
+static_assert(!check_forward_range<cpp20_input_iterator>());
+static_assert(check_forward_range<forward_iterator>());
+static_assert(check_forward_range<bidirectional_iterator>());
+static_assert(check_forward_range<random_access_iterator>());
+static_assert(check_forward_range<contiguous_iterator>());
// template<class T>
// concept input_iterator;
+// std::ranges::forward_range
+
#include <ranges>
#include <iterator>
// clang-format on
static_assert(check_input_range_subsumption<range>());
+
+// clang-format off
+template<std::ranges::input_range R>
+requires std::forward_iterator<std::ranges::iterator_t<R> >
+[[nodiscard]] constexpr bool check_forward_range_subsumption() {
+ return false;
+}
+
+template<std::ranges::forward_range>
+requires true
+[[nodiscard]] constexpr bool check_forward_range_subsumption() {
+ return true;
+}
+// clang-format on
+
+static_assert(check_forward_range_subsumption<range>());
#include <iterator>
-static_assert(std::indirectly_readable<std::cregex_iterator>);
+static_assert(std::forward_iterator<std::cregex_iterator>);
static_assert(!std::indirectly_writable<std::cregex_iterator, char>);
-static_assert(std::incrementable<std::cregex_iterator>);
-static_assert(std::input_or_output_iterator<std::cregex_iterator>);
static_assert(std::sentinel_for<std::cregex_iterator, std::cregex_iterator>);
static_assert(!std::sized_sentinel_for<std::cregex_iterator, std::cregex_iterator>);
-static_assert(std::input_iterator<std::cregex_iterator>);
#include <iterator>
-static_assert(std::indirectly_readable<std::cregex_token_iterator>);
+static_assert(std::forward_iterator<std::cregex_token_iterator>);
static_assert(!std::indirectly_writable<std::cregex_token_iterator, char>);
-static_assert(std::incrementable<std::cregex_token_iterator>);
-static_assert(std::input_or_output_iterator<std::cregex_token_iterator>);
static_assert(std::sentinel_for<std::cregex_token_iterator, std::cregex_token_iterator>);
static_assert(!std::sized_sentinel_for<std::cregex_token_iterator, std::cregex_token_iterator>);
-static_assert(std::input_iterator<std::cregex_token_iterator>);
static_assert(std::same_as<stdr::iterator_t<std::cmatch>, std::cmatch::iterator>);
static_assert(stdr::common_range<std::cmatch>);
-static_assert(stdr::input_range<std::cmatch>);
+static_assert(stdr::forward_range<std::cmatch>);
static_assert(std::same_as<stdr::iterator_t<std::cmatch const>, std::cmatch::const_iterator>);
static_assert(stdr::common_range<std::cmatch const>);
-static_assert(stdr::input_range<std::cmatch const>);
+static_assert(stdr::forward_range<std::cmatch const>);
static_assert(std::same_as<stdr::iterator_t<std::string>, std::string::iterator>);
static_assert(stdr::common_range<std::string>);
-static_assert(stdr::input_range<std::string>);
+static_assert(stdr::forward_range<std::string>);
static_assert(std::same_as<stdr::iterator_t<std::string const>, std::string::const_iterator>);
static_assert(stdr::common_range<std::string const>);
-static_assert(stdr::input_range<std::string const>);
+static_assert(stdr::forward_range<std::string const>);
using const_reverse_iterator = std::string::const_reverse_iterator;
using value_type = char;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(std::indirectly_writable<iterator, value_type>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, value_type>);
-static_assert(std::incrementable<const_iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);
static_assert(std::same_as<stdr::iterator_t<std::string_view>, std::string_view::iterator>);
static_assert(stdr::common_range<std::string_view>);
-static_assert(stdr::input_range<std::string_view>);
+static_assert(stdr::forward_range<std::string_view>);
static_assert(std::same_as<stdr::iterator_t<std::string_view const>, std::string_view::const_iterator>);
static_assert(stdr::common_range<std::string_view const>);
-static_assert(stdr::input_range<std::string_view const>);
+static_assert(stdr::forward_range<std::string_view const>);
using reverse_iterator = std::string_view::reverse_iterator;
using const_reverse_iterator = std::string_view::const_reverse_iterator;
-static_assert(std::indirectly_readable<iterator>);
+static_assert(std::forward_iterator<iterator>);
static_assert(!std::indirectly_writable<iterator, char>);
-static_assert(std::incrementable<iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<iterator, iterator>);
static_assert(std::sentinel_for<iterator, const_iterator>);
static_assert(!std::sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
-static_assert(std::indirectly_readable<const_iterator>);
+static_assert(std::forward_iterator<const_iterator>);
static_assert(!std::indirectly_writable<const_iterator, char>);
-static_assert(std::incrementable<const_iterator>);
-static_assert(std::input_or_output_iterator<iterator>);
static_assert(std::sentinel_for<const_iterator, iterator>);
static_assert(std::sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
-static_assert(std::input_iterator<const_iterator>);