#if _LIBCPP_STD_VER > 17
namespace ranges {
+
+ template <input_range _View, indirect_unary_predicate<iterator_t<_View>> _Pred>
+ requires view<_View> && is_object_v<_Pred>
+ class __filter_view_iterator;
+
+ template <input_range _View, indirect_unary_predicate<iterator_t<_View>> _Pred>
+ requires view<_View> && is_object_v<_Pred>
+ class __filter_view_sentinel;
+
template<input_range _View, indirect_unary_predicate<iterator_t<_View>> _Pred>
requires view<_View> && is_object_v<_Pred>
class filter_view : public view_interface<filter_view<_View, _Pred>> {
using _Cache = _If<_UseCache, __non_propagating_cache<iterator_t<_View>>, __empty_cache>;
_LIBCPP_NO_UNIQUE_ADDRESS _Cache __cached_begin_ = _Cache();
- class __iterator;
- class __sentinel;
+ using __iterator = __filter_view_iterator<_View, _Pred>;
+ using __sentinel = __filter_view_sentinel<_View, _Pred>;
+
+ friend __iterator;
+ friend __sentinel;
public:
_LIBCPP_HIDE_FROM_ABI
template<input_range _View, indirect_unary_predicate<iterator_t<_View>> _Pred>
requires view<_View> && is_object_v<_Pred>
- class filter_view<_View, _Pred>::__iterator : public __filter_iterator_category<_View> {
+ class __filter_view_iterator : public __filter_iterator_category<_View> {
+
+ using __filter_view = filter_view<_View, _Pred>;
+
public:
_LIBCPP_NO_UNIQUE_ADDRESS iterator_t<_View> __current_ = iterator_t<_View>();
- _LIBCPP_NO_UNIQUE_ADDRESS filter_view* __parent_ = nullptr;
+ _LIBCPP_NO_UNIQUE_ADDRESS __filter_view* __parent_ = nullptr;
using iterator_concept =
_If<bidirectional_range<_View>, bidirectional_iterator_tag,
using difference_type = range_difference_t<_View>;
_LIBCPP_HIDE_FROM_ABI
- __iterator() requires default_initializable<iterator_t<_View>> = default;
+ __filter_view_iterator() requires default_initializable<iterator_t<_View>> = default;
_LIBCPP_HIDE_FROM_ABI
- constexpr __iterator(filter_view& __parent, iterator_t<_View> __current)
+ constexpr __filter_view_iterator(__filter_view& __parent, iterator_t<_View> __current)
: __current_(std::move(__current)), __parent_(std::addressof(__parent))
{ }
}
_LIBCPP_HIDE_FROM_ABI
- constexpr __iterator& operator++() {
+ constexpr __filter_view_iterator& operator++() {
__current_ = ranges::find_if(std::move(++__current_), ranges::end(__parent_->__base_),
std::ref(*__parent_->__pred_));
return *this;
_LIBCPP_HIDE_FROM_ABI
constexpr void operator++(int) { ++*this; }
_LIBCPP_HIDE_FROM_ABI
- constexpr __iterator operator++(int) requires forward_range<_View> {
+ constexpr __filter_view_iterator operator++(int) requires forward_range<_View> {
auto __tmp = *this;
++*this;
return __tmp;
}
_LIBCPP_HIDE_FROM_ABI
- constexpr __iterator& operator--() requires bidirectional_range<_View> {
+ constexpr __filter_view_iterator& operator--() requires bidirectional_range<_View> {
do {
--__current_;
} while (!std::invoke(*__parent_->__pred_, *__current_));
return *this;
}
_LIBCPP_HIDE_FROM_ABI
- constexpr __iterator operator--(int) requires bidirectional_range<_View> {
+ constexpr __filter_view_iterator operator--(int) requires bidirectional_range<_View> {
auto tmp = *this;
--*this;
return tmp;
}
_LIBCPP_HIDE_FROM_ABI
- friend constexpr bool operator==(__iterator const& __x, __iterator const& __y)
+ friend constexpr bool operator==(__filter_view_iterator const& __x, __filter_view_iterator const& __y)
requires equality_comparable<iterator_t<_View>>
{
return __x.__current_ == __y.__current_;
}
_LIBCPP_HIDE_FROM_ABI
- friend constexpr range_rvalue_reference_t<_View> iter_move(__iterator const& __it)
+ friend constexpr range_rvalue_reference_t<_View> iter_move(__filter_view_iterator const& __it)
noexcept(noexcept(ranges::iter_move(__it.__current_)))
{
return ranges::iter_move(__it.__current_);
}
_LIBCPP_HIDE_FROM_ABI
- friend constexpr void iter_swap(__iterator const& __x, __iterator const& __y)
+ friend constexpr void iter_swap(__filter_view_iterator const& __x, __filter_view_iterator const& __y)
noexcept(noexcept(ranges::iter_swap(__x.__current_, __y.__current_)))
requires indirectly_swappable<iterator_t<_View>>
{
template<input_range _View, indirect_unary_predicate<iterator_t<_View>> _Pred>
requires view<_View> && is_object_v<_Pred>
- class filter_view<_View, _Pred>::__sentinel {
+ class __filter_view_sentinel {
+ using __filter_view = filter_view<_View, _Pred>;
+
public:
sentinel_t<_View> __end_ = sentinel_t<_View>();
_LIBCPP_HIDE_FROM_ABI
- __sentinel() = default;
+ __filter_view_sentinel() = default;
_LIBCPP_HIDE_FROM_ABI
- constexpr explicit __sentinel(filter_view& __parent)
+ constexpr explicit __filter_view_sentinel(__filter_view& __parent)
: __end_(ranges::end(__parent.__base_))
{ }
_LIBCPP_HIDE_FROM_ABI
constexpr sentinel_t<_View> base() const { return __end_; }
- _LIBCPP_HIDE_FROM_ABI
- friend constexpr bool operator==(__iterator const& __x, __sentinel const& __y) {
+ _LIBCPP_HIDE_FROM_ABI friend constexpr bool
+ operator==(__filter_view_iterator<_View, _Pred> const& __x, __filter_view_sentinel const& __y) {
return __x.__current_ == __y.__end_;
}
};