tmp/tmpy7c4z31u/{from.md → to.md}
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| 1 |
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#### Class template `owning_view` <a id="range.owning.view">[[range.owning.view]]</a>
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`owning_view` is a move-only view of the elements of some other range.
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``` cpp
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namespace std::ranges {
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template<range R>
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requires movable<R> && (!is-initializer-list<R>) // see [range.refinements]
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class owning_view : public view_interface<owning_view<R>> {
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private:
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R r_ = R(); // exposition only
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public:
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owning_view() requires default_initializable<R> = default;
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constexpr owning_view(R&& t);
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owning_view(owning_view&&) = default;
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owning_view& operator=(owning_view&&) = default;
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constexpr R& base() & noexcept { return r_; }
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constexpr const R& base() const & noexcept { return r_; }
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constexpr R&& base() && noexcept { return std::move(r_); }
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constexpr const R&& base() const && noexcept { return std::move(r_); }
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constexpr iterator_t<R> begin() { return ranges::begin(r_); }
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constexpr sentinel_t<R> end() { return ranges::end(r_); }
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constexpr auto begin() const requires range<const R>
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{ return ranges::begin(r_); }
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constexpr auto end() const requires range<const R>
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{ return ranges::end(r_); }
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constexpr bool empty() requires requires { ranges::empty(r_); }
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{ return ranges::empty(r_); }
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constexpr bool empty() const requires requires { ranges::empty(r_); }
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{ return ranges::empty(r_); }
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constexpr auto size() requires sized_range<R>
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{ return ranges::size(r_); }
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constexpr auto size() const requires sized_range<const R>
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{ return ranges::size(r_); }
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constexpr auto data() requires contiguous_range<R>
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{ return ranges::data(r_); }
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constexpr auto data() const requires contiguous_range<const R>
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{ return ranges::data(r_); }
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};
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}
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```
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``` cpp
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constexpr owning_view(R&& t);
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```
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*Effects:* Initializes *r\_* with `std::move(t)`.
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