3.4 KiB
[range.owning.view]
25 Ranges library [ranges]
25.7 Range adaptors [range.adaptors]
25.7.6 All view [range.all]
25.7.6.3 Class template owning_view [range.owning.view]
owning_view is a move-only view of the elements of some other range.
namespace std::ranges {template<range R>requires movable && (!is-initializer-list) // see [range.refinements]class owning_view : public view_interface<owning_view> {private: R r_ = R(); // exposition onlypublic: owning_view() requires default_initializable = default; constexpr owning_view(R&& t);
owning_view(owning_view&&) = default; owning_view& operator=(owning_view&&) = default; constexpr R& base() & noexcept { return r_; }constexpr const R& base() const & noexcept { return r_; }constexpr R&& base() && noexcept { return std::move(r_); }constexpr const R&& base() const && noexcept { return std::move(r_); }constexpr iterator_t begin() { return ranges::begin(r_); }constexpr sentinel_t end() { return ranges::end(r_); }constexpr auto begin() const requires range{ return ranges::begin(r_); }constexpr auto end() const requires range{ return ranges::end(r_); }constexpr bool empty() requires requires { ranges::empty(r_); }{ return ranges::empty(r_); }constexpr bool empty() const requires requires { ranges::empty(r_); }{ return ranges::empty(r_); }constexpr auto size() requires sized_range{ return ranges::size(r_); }constexpr auto size() const requires sized_range{ return ranges::size(r_); }constexpr auto reserve_hint() requires approximately_sized_range{ return ranges::reserve_hint(r_); }constexpr auto reserve_hint() const requires approximately_sized_range{ return ranges::reserve_hint(r_); }constexpr auto data() requires contiguous_range{ return ranges::data(r_); }constexpr auto data() const requires contiguous_range{ return ranges::data(r_); }};}
constexpr owning_view(R&& t);
Effects: Initializes r_ with std::move(t).