24 Ranges library [ranges]

24.7 Range adaptors [range.adaptors]

24.7.5 Filter view [range.filter]

24.7.5.4 Class filter_­view​::​sentinel [range.filter.sentinel]

namespace std::ranges { template<input_­range V, indirect_­unary_­predicate<iterator_t<V>> Pred> requires view<V> && is_object_v<Pred> class filter_view<V, Pred>::sentinel { private: sentinel_t<V> end_ = sentinel_t<V>(); // exposition only public: sentinel() = default; constexpr explicit sentinel(filter_view& parent); constexpr sentinel_t<V> base() const; friend constexpr bool operator==(const iterator& x, const sentinel& y); }; }
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constexpr explicit sentinel(filter_view& parent);
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Effects: Initializes end_­ with ranges​::​end(parent.base_­).
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constexpr sentinel_t<V> base() const;
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Effects: Equivalent to: return end_­;
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friend constexpr bool operator==(const iterator& x, const sentinel& y);
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Effects: Equivalent to: return x.current_­ == y.end_­;