tmp/tmpamaoneqz/{from.md → to.md}
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| 1 |
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#### Class template `adjacent_transform_view` <a id="range.adjacent.transform.view">[[range.adjacent.transform.view]]</a>
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``` cpp
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namespace std::ranges {
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template<forward_range V, move_constructible F, size_t N>
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requires view<V> && (N > 0) && is_object_v<F> &&
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regular_invocable<F&, REPEAT(range_reference_t<V>, N)...> &&
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can-reference<invoke_result_t<F&, REPEAT(range_reference_t<V>, N)...>>
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class adjacent_transform_view : public view_interface<adjacent_transform_view<V, F, N>> {
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movable-box<F> fun_; // exposition only
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adjacent_view<V, N> inner_; // exposition only
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using InnerView = adjacent_view<V, N>; // exposition only
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template<bool Const>
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using inner-iterator = iterator_t<maybe-const<Const, InnerView>>; // exposition only
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template<bool Const>
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using inner-sentinel = sentinel_t<maybe-const<Const, InnerView>>; // exposition only
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// [range.adjacent.transform.iterator], class template adjacent_transform_view::iterator
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template<bool> class iterator; // exposition only
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// [range.adjacent.transform.sentinel], class template adjacent_transform_view::sentinel
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template<bool> class sentinel; // exposition only
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public:
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adjacent_transform_view() = default;
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constexpr explicit adjacent_transform_view(V base, F fun);
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constexpr V base() const & requires copy_constructible<InnerView> { return inner_.base(); }
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constexpr V base() && { return std::move(inner_).base(); }
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constexpr auto begin() {
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return iterator<false>(*this, inner_.begin());
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}
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constexpr auto begin() const
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requires range<const InnerView> &&
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regular_invocable<const F&, REPEAT(range_reference_t<const V>, N)...> {
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return iterator<true>(*this, inner_.begin());
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}
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constexpr auto end() {
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if constexpr (common_range<InnerView>) {
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return iterator<false>(*this, inner_.end());
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} else {
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return sentinel<false>(inner_.end());
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}
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}
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constexpr auto end() const
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requires range<const InnerView> &&
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regular_invocable<const F&, REPEAT(range_reference_t<const V>, N)...> {
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if constexpr (common_range<const InnerView>) {
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return iterator<true>(*this, inner_.end());
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} else {
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return sentinel<true>(inner_.end());
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}
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}
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constexpr auto size() requires sized_range<InnerView> {
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return inner_.size();
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}
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constexpr auto size() const requires sized_range<const InnerView> {
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return inner_.size();
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}
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};
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}
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```
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``` cpp
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constexpr explicit adjacent_transform_view(V base, F fun);
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```
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*Effects:* Initializes *fun\_* with `std::move(fun)` and *inner\_* with
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`std::move(base)`.
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