tmp/tmpgk2jryrm/{from.md → to.md}
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| 1 |
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#### Class template `reverse_view` <a id="range.reverse.view">[[range.reverse.view]]</a>
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``` cpp
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namespace std::ranges {
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template<view V>
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requires bidirectional_range<V>
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class reverse_view : public view_interface<reverse_view<V>> {
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private:
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V base_ = V(); // exposition only
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public:
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reverse_view() = default;
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constexpr explicit reverse_view(V r);
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constexpr V base() const& requires copy_constructible<V> { return base_; }
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constexpr V base() && { return std::move(base_); }
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constexpr reverse_iterator<iterator_t<V>> begin();
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constexpr reverse_iterator<iterator_t<V>> begin() requires common_range<V>;
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constexpr auto begin() const requires common_range<const V>;
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constexpr reverse_iterator<iterator_t<V>> end();
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constexpr auto end() const requires common_range<const V>;
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constexpr auto size() requires sized_range<V> {
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return ranges::size(base_);
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}
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constexpr auto size() const requires sized_range<const V> {
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return ranges::size(base_);
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}
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};
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template<class R>
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reverse_view(R&&) -> reverse_view<views::all_t<R>>;
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}
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```
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``` cpp
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constexpr explicit reverse_view(V base);
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```
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*Effects:* Initializes *base\_* with `std::move(base)`.
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``` cpp
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constexpr reverse_iterator<iterator_t<V>> begin();
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```
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*Returns:*
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``` cpp
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make_reverse_iterator(ranges::next(ranges::begin(base_), ranges::end(base_)))
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```
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*Remarks:* In order to provide the amortized constant time complexity
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required by the `range` concept, this function caches the result within
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the `reverse_view` for use on subsequent calls.
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``` cpp
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constexpr reverse_iterator<iterator_t<V>> begin() requires common_range<V>;
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constexpr auto begin() const requires common_range<const V>;
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```
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*Effects:* Equivalent to:
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`return make_reverse_iterator(ranges::end(base_));`
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``` cpp
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constexpr reverse_iterator<iterator_t<V>> end();
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constexpr auto end() const requires common_range<const V>;
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```
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*Effects:* Equivalent to:
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`return make_reverse_iterator(ranges::begin(base_));`
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