[range.chunk.by.iter]

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namespace std::ranges { template<forward_range V, indirect_binary_predicate<iterator_t<V>, iterator_t<V>> Pred> requires view<V> && is_object_v<Pred> class chunk_by_view<V, Pred>::iterator { chunk_by_view* parent_ = nullptr; / exposition only iterator_t<V> current_ = iterator_t<V>(); / exposition only iterator_t<V> next_ = iterator_t<V>(); / exposition only constexpr iterator(chunk_by_view& parent, iterator_t<V> current, / exposition only iterator_t<V> next); public: using value_type = subrange<iterator_t<V>>; using difference_type = range_difference_t<V>; using iterator_category = input_iterator_tag; using iterator_concept = see below; iterator() = default; constexpr value_type operator*() const; constexpr iterator& operator+(); constexpr iterator operator+(int); constexpr iterator& operator-() requires bidirectional_range<V>; constexpr iterator operator-(int) requires bidirectional_range<V>; friend constexpr bool operator=(const iterator& x, const iterator& y); friend constexpr bool operator=(const iterator& x, default_sentinel_t); }; }

iterator::iterator_concept is defined as follows:

(1.1)
If V models bidirectional_range, then iterator_concept denotes bidirectional_iterator_tag.
(1.2)
Otherwise, iterator_concept denotes forward_iterator_tag.

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constexpr iterator(chunk_by_view& parent, iterator_t<V> current, iterator_t<V> next);

Effects: Initializes parent_ with addressof(parent), current_ with current, and next_ with next.

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constexpr value_type operator*() const;

Returns: subrange(current_, next_).

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constexpr iterator& operator+();

Effects: Equivalent to: current_ = next_; next_ = parent_->find-next(current_); return *this;

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constexpr iterator operator+(int);

Effects: Equivalent to: auto tmp = *this; ++*this; return tmp;

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constexpr iterator& operator-() requires bidirectional_range<V>;

Effects: Equivalent to: next_ = current_; current_ = parent_->find-prev(next_); return *this;

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constexpr iterator operator-(int) requires bidirectional_range<V>;

Effects: Equivalent to: auto tmp = *this; --*this; return tmp;

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friend constexpr bool operator=(const iterator& x, const iterator& y);

Returns: x.current_ == y.current_.

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friend constexpr bool operator=(const iterator& x, default_sentinel_t);

Returns: x.current_ == x.next_.

25 Ranges library [ranges]

25.7 Range adaptors [range.adaptors]

25.7.31 Chunk by view [range.chunk.by]

25.7.31.3 Class chunk_by_view::iterator [range.chunk.by.iter]

25 Ranges library [ranges]

25.7 Range adaptors [range.adaptors]

25.7.31 Chunk by view [range.chunk.by]

25.7.31.3 Class chunk_by_view​::​iterator [range.chunk.by.iter]

25.7.31.3 Class chunk_by_view::iterator [range.chunk.by.iter]